2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
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.
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
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.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
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.
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-
41 * lport > disc, lport > rport, disc > rport
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
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
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.
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
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.
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.
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).
90 #include <linux/timer.h>
91 #include <asm/unaligned.h>
93 #include <scsi/fc/fc_gs.h>
95 #include <scsi/libfc.h>
96 #include <scsi/fc_encode.h>
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
102 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
104 static int fc_lport_debug
;
106 #define FC_DEBUG_LPORT(fmt...) \
108 if (fc_lport_debug) \
112 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
114 static void fc_lport_enter_reset(struct fc_lport
*);
115 static void fc_lport_enter_flogi(struct fc_lport
*);
116 static void fc_lport_enter_dns(struct fc_lport
*);
117 static void fc_lport_enter_rpn_id(struct fc_lport
*);
118 static void fc_lport_enter_rft_id(struct fc_lport
*);
119 static void fc_lport_enter_scr(struct fc_lport
*);
120 static void fc_lport_enter_ready(struct fc_lport
*);
121 static void fc_lport_enter_logo(struct fc_lport
*);
123 static const char *fc_lport_state_names
[] = {
124 [LPORT_ST_NONE
] = "none",
125 [LPORT_ST_FLOGI
] = "FLOGI",
126 [LPORT_ST_DNS
] = "dNS",
127 [LPORT_ST_RPN_ID
] = "RPN_ID",
128 [LPORT_ST_RFT_ID
] = "RFT_ID",
129 [LPORT_ST_SCR
] = "SCR",
130 [LPORT_ST_READY
] = "Ready",
131 [LPORT_ST_LOGO
] = "LOGO",
132 [LPORT_ST_RESET
] = "reset",
135 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
142 * fc_lport_rport_callback - Event handler for rport events
143 * @lport: The lport which is receiving the event
144 * @rport: The rport which the event has occured on
145 * @event: The event that occured
147 * Locking Note: The rport lock should not be held when calling
150 static void fc_lport_rport_callback(struct fc_lport
*lport
,
151 struct fc_rport
*rport
,
152 enum fc_rport_event event
)
154 FC_DEBUG_LPORT("Received a %d event for port (%6x)\n", event
,
158 case RPORT_EV_CREATED
:
159 if (rport
->port_id
== FC_FID_DIR_SERV
) {
160 mutex_lock(&lport
->lp_mutex
);
161 if (lport
->state
== LPORT_ST_DNS
) {
162 lport
->dns_rp
= rport
;
163 fc_lport_enter_rpn_id(lport
);
165 FC_DEBUG_LPORT("Received an CREATED event on "
166 "port (%6x) for the directory "
167 "server, but the lport is not "
168 "in the DNS state, it's in the "
169 "%d state", rport
->port_id
,
171 lport
->tt
.rport_logoff(rport
);
173 mutex_unlock(&lport
->lp_mutex
);
175 FC_DEBUG_LPORT("Received an event for port (%6x) "
176 "which is not the directory server\n",
180 case RPORT_EV_FAILED
:
182 if (rport
->port_id
== FC_FID_DIR_SERV
) {
183 mutex_lock(&lport
->lp_mutex
);
184 lport
->dns_rp
= NULL
;
185 mutex_unlock(&lport
->lp_mutex
);
188 FC_DEBUG_LPORT("Received an event for port (%6x) "
189 "which is not the directory server\n",
198 * fc_lport_state - Return a string which represents the lport's state
199 * @lport: The lport whose state is to converted to a string
201 static const char *fc_lport_state(struct fc_lport
*lport
)
205 cp
= fc_lport_state_names
[lport
->state
];
212 * fc_lport_ptp_setup - Create an rport for point-to-point mode
213 * @lport: The lport to attach the ptp rport to
214 * @fid: The FID of the ptp rport
215 * @remote_wwpn: The WWPN of the ptp rport
216 * @remote_wwnn: The WWNN of the ptp rport
218 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
219 u32 remote_fid
, u64 remote_wwpn
,
222 struct fc_disc_port dp
;
225 dp
.ids
.port_id
= remote_fid
;
226 dp
.ids
.port_name
= remote_wwpn
;
227 dp
.ids
.node_name
= remote_wwnn
;
228 dp
.ids
.roles
= FC_RPORT_ROLE_UNKNOWN
;
231 lport
->tt
.rport_logoff(lport
->ptp_rp
);
232 lport
->ptp_rp
= NULL
;
235 lport
->ptp_rp
= fc_rport_rogue_create(&dp
);
237 lport
->tt
.rport_login(lport
->ptp_rp
);
239 fc_lport_enter_ready(lport
);
242 void fc_get_host_port_type(struct Scsi_Host
*shost
)
244 /* TODO - currently just NPORT */
245 fc_host_port_type(shost
) = FC_PORTTYPE_NPORT
;
247 EXPORT_SYMBOL(fc_get_host_port_type
);
249 void fc_get_host_port_state(struct Scsi_Host
*shost
)
251 struct fc_lport
*lp
= shost_priv(shost
);
253 if ((lp
->link_status
& FC_LINK_UP
) == FC_LINK_UP
)
254 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
256 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
258 EXPORT_SYMBOL(fc_get_host_port_state
);
260 void fc_get_host_speed(struct Scsi_Host
*shost
)
262 struct fc_lport
*lport
= shost_priv(shost
);
264 fc_host_speed(shost
) = lport
->link_speed
;
266 EXPORT_SYMBOL(fc_get_host_speed
);
268 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
271 struct fc_host_statistics
*fcoe_stats
;
272 struct fc_lport
*lp
= shost_priv(shost
);
273 struct timespec v0
, v1
;
275 fcoe_stats
= &lp
->host_stats
;
276 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
278 jiffies_to_timespec(jiffies
, &v0
);
279 jiffies_to_timespec(lp
->boot_time
, &v1
);
280 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
282 for_each_online_cpu(i
) {
283 struct fcoe_dev_stats
*stats
= lp
->dev_stats
[i
];
286 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
287 fcoe_stats
->tx_words
+= stats
->TxWords
;
288 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
289 fcoe_stats
->rx_words
+= stats
->RxWords
;
290 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
291 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
292 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
293 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
294 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
295 fcoe_stats
->fcp_input_megabytes
+= stats
->InputMegabytes
;
296 fcoe_stats
->fcp_output_megabytes
+= stats
->OutputMegabytes
;
297 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
299 fcoe_stats
->lip_count
= -1;
300 fcoe_stats
->nos_count
= -1;
301 fcoe_stats
->loss_of_sync_count
= -1;
302 fcoe_stats
->loss_of_signal_count
= -1;
303 fcoe_stats
->prim_seq_protocol_err_count
= -1;
304 fcoe_stats
->dumped_frames
= -1;
307 EXPORT_SYMBOL(fc_get_host_stats
);
310 * Fill in FLOGI command for request.
313 fc_lport_flogi_fill(struct fc_lport
*lport
, struct fc_els_flogi
*flogi
,
316 struct fc_els_csp
*sp
;
317 struct fc_els_cssp
*cp
;
319 memset(flogi
, 0, sizeof(*flogi
));
320 flogi
->fl_cmd
= (u8
) op
;
321 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
322 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
324 sp
->sp_hi_ver
= 0x20;
325 sp
->sp_lo_ver
= 0x20;
326 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
327 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
328 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
329 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
330 if (op
!= ELS_FLOGI
) {
331 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
332 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
333 sp
->sp_rel_off
= htons(0x1f);
334 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
336 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
337 cp
->cp_con_seq
= htons(255);
343 * Add a supported FC-4 type.
345 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
349 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
350 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
354 * fc_lport_recv_rlir_req - Handle received Registered Link Incident Report.
355 * @lport: Fibre Channel local port recieving the RLIR
356 * @sp: current sequence in the RLIR exchange
357 * @fp: RLIR request frame
359 * Locking Note: The lport lock is exected to be held before calling
362 static void fc_lport_recv_rlir_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
363 struct fc_lport
*lport
)
365 FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
366 fc_lport_state(lport
));
368 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
373 * fc_lport_recv_echo_req - Handle received ECHO request
374 * @lport: Fibre Channel local port recieving the ECHO
375 * @sp: current sequence in the ECHO exchange
376 * @fp: ECHO request frame
378 * Locking Note: The lport lock is exected to be held before calling
381 static void fc_lport_recv_echo_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
382 struct fc_lport
*lport
)
385 struct fc_exch
*ep
= fc_seq_exch(sp
);
391 FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
392 fc_lport_state(lport
));
394 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
395 pp
= fc_frame_payload_get(in_fp
, len
);
397 if (len
< sizeof(__be32
))
398 len
= sizeof(__be32
);
400 fp
= fc_frame_alloc(lport
, len
);
402 dp
= fc_frame_payload_get(fp
, len
);
404 *((u32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
405 sp
= lport
->tt
.seq_start_next(sp
);
406 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
407 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
408 FC_TYPE_ELS
, f_ctl
, 0);
409 lport
->tt
.seq_send(lport
, sp
, fp
);
411 fc_frame_free(in_fp
);
415 * fc_lport_recv_echo_req - Handle received Request Node ID data request
416 * @lport: Fibre Channel local port recieving the RNID
417 * @sp: current sequence in the RNID exchange
418 * @fp: RNID request frame
420 * Locking Note: The lport lock is exected to be held before calling
423 static void fc_lport_recv_rnid_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
424 struct fc_lport
*lport
)
427 struct fc_exch
*ep
= fc_seq_exch(sp
);
428 struct fc_els_rnid
*req
;
430 struct fc_els_rnid_resp rnid
;
431 struct fc_els_rnid_cid cid
;
432 struct fc_els_rnid_gen gen
;
434 struct fc_seq_els_data rjt_data
;
439 FC_DEBUG_LPORT("Received RNID request while in state %s\n",
440 fc_lport_state(lport
));
442 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
445 rjt_data
.reason
= ELS_RJT_LOGIC
;
446 rjt_data
.explan
= ELS_EXPL_NONE
;
447 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
451 if (fmt
!= ELS_RNIDF_GEN
||
452 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
453 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
454 len
-= sizeof(rp
->gen
);
456 fp
= fc_frame_alloc(lport
, len
);
458 rp
= fc_frame_payload_get(fp
, len
);
460 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
461 rp
->rnid
.rnid_fmt
= fmt
;
462 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
463 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
464 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
465 if (fmt
== ELS_RNIDF_GEN
) {
466 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
467 memcpy(&rp
->gen
, &lport
->rnid_gen
,
470 sp
= lport
->tt
.seq_start_next(sp
);
471 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
472 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
473 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
474 FC_TYPE_ELS
, f_ctl
, 0);
475 lport
->tt
.seq_send(lport
, sp
, fp
);
478 fc_frame_free(in_fp
);
482 * fc_lport_recv_adisc_req - Handle received Address Discovery Request
483 * @lport: Fibre Channel local port recieving the ADISC
484 * @sp: current sequence in the ADISC exchange
485 * @fp: ADISC request frame
487 * Locking Note: The lport lock is expected to be held before calling
490 static void fc_lport_recv_adisc_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
491 struct fc_lport
*lport
)
494 struct fc_exch
*ep
= fc_seq_exch(sp
);
495 struct fc_els_adisc
*req
, *rp
;
496 struct fc_seq_els_data rjt_data
;
500 FC_DEBUG_LPORT("Received ADISC request while in state %s\n",
501 fc_lport_state(lport
));
503 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
506 rjt_data
.reason
= ELS_RJT_LOGIC
;
507 rjt_data
.explan
= ELS_EXPL_NONE
;
508 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
511 fp
= fc_frame_alloc(lport
, len
);
513 rp
= fc_frame_payload_get(fp
, len
);
515 rp
->adisc_cmd
= ELS_LS_ACC
;
516 rp
->adisc_wwpn
= htonll(lport
->wwpn
);
517 rp
->adisc_wwnn
= htonll(lport
->wwnn
);
518 hton24(rp
->adisc_port_id
,
519 fc_host_port_id(lport
->host
));
520 sp
= lport
->tt
.seq_start_next(sp
);
521 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
522 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
523 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
524 FC_TYPE_ELS
, f_ctl
, 0);
525 lport
->tt
.seq_send(lport
, sp
, fp
);
528 fc_frame_free(in_fp
);
532 * fc_lport_recv_logo_req - Handle received fabric LOGO request
533 * @lport: Fibre Channel local port recieving the LOGO
534 * @sp: current sequence in the LOGO exchange
535 * @fp: LOGO request frame
537 * Locking Note: The lport lock is exected to be held before calling
540 static void fc_lport_recv_logo_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
541 struct fc_lport
*lport
)
543 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
544 fc_lport_enter_reset(lport
);
549 * fc_fabric_login - Start the lport state machine
550 * @lport: The lport that should log into the fabric
552 * Locking Note: This function should not be called
553 * with the lport lock held.
555 int fc_fabric_login(struct fc_lport
*lport
)
559 mutex_lock(&lport
->lp_mutex
);
560 if (lport
->state
== LPORT_ST_NONE
) {
561 fc_lport_enter_reset(lport
);
564 mutex_unlock(&lport
->lp_mutex
);
568 EXPORT_SYMBOL(fc_fabric_login
);
571 * fc_linkup - Handler for transport linkup events
572 * @lport: The lport whose link is up
574 void fc_linkup(struct fc_lport
*lport
)
576 FC_DEBUG_LPORT("Link is up for port (%6x)\n",
577 fc_host_port_id(lport
->host
));
579 mutex_lock(&lport
->lp_mutex
);
580 if ((lport
->link_status
& FC_LINK_UP
) != FC_LINK_UP
) {
581 lport
->link_status
|= FC_LINK_UP
;
583 if (lport
->state
== LPORT_ST_RESET
)
584 fc_lport_enter_flogi(lport
);
586 mutex_unlock(&lport
->lp_mutex
);
588 EXPORT_SYMBOL(fc_linkup
);
591 * fc_linkdown - Handler for transport linkdown events
592 * @lport: The lport whose link is down
594 void fc_linkdown(struct fc_lport
*lport
)
596 mutex_lock(&lport
->lp_mutex
);
597 FC_DEBUG_LPORT("Link is down for port (%6x)\n",
598 fc_host_port_id(lport
->host
));
600 if ((lport
->link_status
& FC_LINK_UP
) == FC_LINK_UP
) {
601 lport
->link_status
&= ~(FC_LINK_UP
);
602 fc_lport_enter_reset(lport
);
603 lport
->tt
.fcp_cleanup(lport
);
605 mutex_unlock(&lport
->lp_mutex
);
607 EXPORT_SYMBOL(fc_linkdown
);
610 * fc_pause - Pause the flow of frames
611 * @lport: The lport to be paused
613 void fc_pause(struct fc_lport
*lport
)
615 mutex_lock(&lport
->lp_mutex
);
616 lport
->link_status
|= FC_PAUSE
;
617 mutex_unlock(&lport
->lp_mutex
);
619 EXPORT_SYMBOL(fc_pause
);
622 * fc_unpause - Unpause the flow of frames
623 * @lport: The lport to be unpaused
625 void fc_unpause(struct fc_lport
*lport
)
627 mutex_lock(&lport
->lp_mutex
);
628 lport
->link_status
&= ~(FC_PAUSE
);
629 mutex_unlock(&lport
->lp_mutex
);
631 EXPORT_SYMBOL(fc_unpause
);
634 * fc_fabric_logoff - Logout of the fabric
635 * @lport: fc_lport pointer to logoff the fabric
638 * 0 for success, -1 for failure
640 int fc_fabric_logoff(struct fc_lport
*lport
)
642 lport
->tt
.disc_stop_final(lport
);
643 mutex_lock(&lport
->lp_mutex
);
644 fc_lport_enter_logo(lport
);
645 mutex_unlock(&lport
->lp_mutex
);
648 EXPORT_SYMBOL(fc_fabric_logoff
);
651 * fc_lport_destroy - unregister a fc_lport
652 * @lport: fc_lport pointer to unregister
657 * exit routine for fc_lport instance
658 * clean-up all the allocated memory
659 * and free up other system resources.
662 int fc_lport_destroy(struct fc_lport
*lport
)
664 lport
->tt
.frame_send
= fc_frame_drop
;
665 lport
->tt
.fcp_abort_io(lport
);
666 lport
->tt
.exch_mgr_reset(lport
->emp
, 0, 0);
669 EXPORT_SYMBOL(fc_lport_destroy
);
672 * fc_set_mfs - sets up the mfs for the corresponding fc_lport
673 * @lport: fc_lport pointer to unregister
674 * @mfs: the new mfs for fc_lport
676 * Set mfs for the given fc_lport to the new mfs.
678 * Return: 0 for success
681 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
683 unsigned int old_mfs
;
686 mutex_lock(&lport
->lp_mutex
);
688 old_mfs
= lport
->mfs
;
690 if (mfs
>= FC_MIN_MAX_FRAME
) {
692 if (mfs
> FC_MAX_FRAME
)
694 mfs
-= sizeof(struct fc_frame_header
);
699 if (!rc
&& mfs
< old_mfs
)
700 fc_lport_enter_reset(lport
);
702 mutex_unlock(&lport
->lp_mutex
);
706 EXPORT_SYMBOL(fc_set_mfs
);
709 * fc_lport_disc_callback - Callback for discovery events
710 * @lport: FC local port
711 * @event: The discovery event
713 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
716 case DISC_EV_SUCCESS
:
717 FC_DEBUG_LPORT("Got a SUCCESS event for port (%6x)\n",
718 fc_host_port_id(lport
->host
));
721 FC_DEBUG_LPORT("Got a FAILED event for port (%6x)\n",
722 fc_host_port_id(lport
->host
));
723 mutex_lock(&lport
->lp_mutex
);
724 fc_lport_enter_reset(lport
);
725 mutex_unlock(&lport
->lp_mutex
);
734 * fc_rport_enter_ready - Enter the ready state and start discovery
735 * @lport: Fibre Channel local port that is ready
737 * Locking Note: The lport lock is expected to be held before calling
740 static void fc_lport_enter_ready(struct fc_lport
*lport
)
742 FC_DEBUG_LPORT("Port (%6x) entered Ready from state %s\n",
743 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
745 fc_lport_state_enter(lport
, LPORT_ST_READY
);
747 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
751 * fc_lport_recv_flogi_req - Receive a FLOGI request
752 * @sp_in: The sequence the FLOGI is on
753 * @rx_fp: The frame the FLOGI is in
754 * @lport: The lport that recieved the request
756 * A received FLOGI request indicates a point-to-point connection.
757 * Accept it with the common service parameters indicating our N port.
758 * Set up to do a PLOGI if we have the higher-number WWPN.
760 * Locking Note: The lport lock is exected to be held before calling
763 static void fc_lport_recv_flogi_req(struct fc_seq
*sp_in
,
764 struct fc_frame
*rx_fp
,
765 struct fc_lport
*lport
)
768 struct fc_frame_header
*fh
;
771 struct fc_els_flogi
*flp
;
772 struct fc_els_flogi
*new_flp
;
778 FC_DEBUG_LPORT("Received FLOGI request while in state %s\n",
779 fc_lport_state(lport
));
781 fh
= fc_frame_header_get(rx_fp
);
782 remote_fid
= ntoh24(fh
->fh_s_id
);
783 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
786 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
787 if (remote_wwpn
== lport
->wwpn
) {
788 FC_DBG("FLOGI from port with same WWPN %llx "
789 "possible configuration error\n", remote_wwpn
);
792 FC_DBG("FLOGI from port WWPN %llx\n", remote_wwpn
);
795 * XXX what is the right thing to do for FIDs?
796 * The originator might expect our S_ID to be 0xfffffe.
797 * But if so, both of us could end up with the same FID.
799 local_fid
= FC_LOCAL_PTP_FID_LO
;
800 if (remote_wwpn
< lport
->wwpn
) {
801 local_fid
= FC_LOCAL_PTP_FID_HI
;
802 if (!remote_fid
|| remote_fid
== local_fid
)
803 remote_fid
= FC_LOCAL_PTP_FID_LO
;
804 } else if (!remote_fid
) {
805 remote_fid
= FC_LOCAL_PTP_FID_HI
;
808 fc_host_port_id(lport
->host
) = local_fid
;
810 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
812 sp
= lport
->tt
.seq_start_next(fr_seq(rx_fp
));
813 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
814 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
815 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
818 * Send the response. If this fails, the originator should
819 * repeat the sequence.
821 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
822 ep
= fc_seq_exch(sp
);
823 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
824 FC_TYPE_ELS
, f_ctl
, 0);
825 lport
->tt
.seq_send(lport
, sp
, fp
);
828 fc_lport_error(lport
, fp
);
830 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
831 get_unaligned_be64(&flp
->fl_wwnn
));
833 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
837 fc_frame_free(rx_fp
);
841 * fc_lport_recv_req - The generic lport request handler
842 * @lport: The lport that received the request
843 * @sp: The sequence the request is on
844 * @fp: The frame the request is in
846 * This function will see if the lport handles the request or
847 * if an rport should handle the request.
849 * Locking Note: This function should not be called with the lport
850 * lock held becuase it will grab the lock.
852 static void fc_lport_recv_req(struct fc_lport
*lport
, struct fc_seq
*sp
,
855 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
856 void (*recv
) (struct fc_seq
*, struct fc_frame
*, struct fc_lport
*);
857 struct fc_rport
*rport
;
860 struct fc_seq_els_data rjt_data
;
862 mutex_lock(&lport
->lp_mutex
);
865 * Handle special ELS cases like FLOGI, LOGO, and
866 * RSCN here. These don't require a session.
867 * Even if we had a session, it might not be ready.
869 if (fh
->fh_type
== FC_TYPE_ELS
&& fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
874 switch (fc_frame_payload_op(fp
)) {
876 recv
= fc_lport_recv_flogi_req
;
879 fh
= fc_frame_header_get(fp
);
880 if (ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
)
881 recv
= fc_lport_recv_logo_req
;
884 recv
= lport
->tt
.disc_recv_req
;
887 recv
= fc_lport_recv_echo_req
;
890 recv
= fc_lport_recv_rlir_req
;
893 recv
= fc_lport_recv_rnid_req
;
896 recv
= fc_lport_recv_adisc_req
;
905 * If this is a new incoming PLOGI, we won't find it.
907 s_id
= ntoh24(fh
->fh_s_id
);
908 d_id
= ntoh24(fh
->fh_d_id
);
910 rport
= lport
->tt
.rport_lookup(lport
, s_id
);
912 lport
->tt
.rport_recv_req(sp
, fp
, rport
);
915 rjt_data
.reason
= ELS_RJT_UNAB
;
916 rjt_data
.explan
= ELS_EXPL_NONE
;
917 lport
->tt
.seq_els_rsp_send(sp
,
924 FC_DBG("dropping invalid frame (eof %x)\n", fr_eof(fp
));
927 mutex_unlock(&lport
->lp_mutex
);
930 * The common exch_done for all request may not be good
931 * if any request requires longer hold on exhange. XXX
933 lport
->tt
.exch_done(sp
);
937 * fc_lport_reset - Reset an lport
938 * @lport: The lport which should be reset
940 * Locking Note: This functions should not be called with the
943 int fc_lport_reset(struct fc_lport
*lport
)
945 mutex_lock(&lport
->lp_mutex
);
946 fc_lport_enter_reset(lport
);
947 mutex_unlock(&lport
->lp_mutex
);
950 EXPORT_SYMBOL(fc_lport_reset
);
953 * fc_rport_enter_reset - Reset the local port
954 * @lport: Fibre Channel local port to be reset
956 * Locking Note: The lport lock is expected to be held before calling
959 static void fc_lport_enter_reset(struct fc_lport
*lport
)
961 FC_DEBUG_LPORT("Port (%6x) entered RESET state from %s state\n",
962 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
964 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
967 lport
->tt
.rport_logoff(lport
->dns_rp
);
970 lport
->tt
.rport_logoff(lport
->ptp_rp
);
971 lport
->ptp_rp
= NULL
;
974 lport
->tt
.disc_stop(lport
);
976 lport
->tt
.exch_mgr_reset(lport
->emp
, 0, 0);
977 fc_host_fabric_name(lport
->host
) = 0;
978 fc_host_port_id(lport
->host
) = 0;
980 if ((lport
->link_status
& FC_LINK_UP
) == FC_LINK_UP
)
981 fc_lport_enter_flogi(lport
);
985 * fc_lport_error - Handler for any errors
986 * @lport: The fc_lport object
987 * @fp: The frame pointer
989 * If the error was caused by a resource allocation failure
990 * then wait for half a second and retry, otherwise retry
991 * after the e_d_tov time.
993 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
995 unsigned long delay
= 0;
996 FC_DEBUG_LPORT("Error %ld in state %s, retries %d\n",
997 PTR_ERR(fp
), fc_lport_state(lport
),
1000 if (!fp
|| PTR_ERR(fp
) == -FC_EX_TIMEOUT
) {
1002 * Memory allocation failure, or the exchange timed out.
1005 if (lport
->retry_count
< lport
->max_retry_count
) {
1006 lport
->retry_count
++;
1008 delay
= msecs_to_jiffies(500);
1010 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1012 schedule_delayed_work(&lport
->retry_work
, delay
);
1014 switch (lport
->state
) {
1016 case LPORT_ST_READY
:
1017 case LPORT_ST_RESET
:
1018 case LPORT_ST_RPN_ID
:
1019 case LPORT_ST_RFT_ID
:
1022 case LPORT_ST_FLOGI
:
1024 fc_lport_enter_reset(lport
);
1032 * fc_lport_rft_id_resp - Handle response to Register Fibre
1033 * Channel Types by ID (RPN_ID) request
1034 * @sp: current sequence in RPN_ID exchange
1035 * @fp: response frame
1036 * @lp_arg: Fibre Channel host port instance
1038 * Locking Note: This function will be called without the lport lock
1039 * held, but it will lock, call an _enter_* function or fc_lport_error
1040 * and then unlock the lport.
1042 static void fc_lport_rft_id_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1045 struct fc_lport
*lport
= lp_arg
;
1046 struct fc_frame_header
*fh
;
1047 struct fc_ct_hdr
*ct
;
1049 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1052 mutex_lock(&lport
->lp_mutex
);
1054 FC_DEBUG_LPORT("Received a RFT_ID response\n");
1056 if (lport
->state
!= LPORT_ST_RFT_ID
) {
1057 FC_DBG("Received a RFT_ID response, but in state %s\n",
1058 fc_lport_state(lport
));
1063 fc_lport_error(lport
, fp
);
1067 fh
= fc_frame_header_get(fp
);
1068 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1070 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1071 ct
->ct_fs_type
== FC_FST_DIR
&&
1072 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1073 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1074 fc_lport_enter_scr(lport
);
1076 fc_lport_error(lport
, fp
);
1080 mutex_unlock(&lport
->lp_mutex
);
1084 * fc_lport_rpn_id_resp - Handle response to Register Port
1085 * Name by ID (RPN_ID) request
1086 * @sp: current sequence in RPN_ID exchange
1087 * @fp: response frame
1088 * @lp_arg: Fibre Channel host port instance
1090 * Locking Note: This function will be called without the lport lock
1091 * held, but it will lock, call an _enter_* function or fc_lport_error
1092 * and then unlock the lport.
1094 static void fc_lport_rpn_id_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1097 struct fc_lport
*lport
= lp_arg
;
1098 struct fc_frame_header
*fh
;
1099 struct fc_ct_hdr
*ct
;
1101 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1104 mutex_lock(&lport
->lp_mutex
);
1106 FC_DEBUG_LPORT("Received a RPN_ID response\n");
1108 if (lport
->state
!= LPORT_ST_RPN_ID
) {
1109 FC_DBG("Received a RPN_ID response, but in state %s\n",
1110 fc_lport_state(lport
));
1115 fc_lport_error(lport
, fp
);
1119 fh
= fc_frame_header_get(fp
);
1120 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1121 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1122 ct
->ct_fs_type
== FC_FST_DIR
&&
1123 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1124 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1125 fc_lport_enter_rft_id(lport
);
1127 fc_lport_error(lport
, fp
);
1132 mutex_unlock(&lport
->lp_mutex
);
1136 * fc_lport_scr_resp - Handle response to State Change Register (SCR) request
1137 * @sp: current sequence in SCR exchange
1138 * @fp: response frame
1139 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1141 * Locking Note: This function will be called without the lport lock
1142 * held, but it will lock, call an _enter_* function or fc_lport_error
1143 * and then unlock the lport.
1145 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1148 struct fc_lport
*lport
= lp_arg
;
1151 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1154 mutex_lock(&lport
->lp_mutex
);
1156 FC_DEBUG_LPORT("Received a SCR response\n");
1158 if (lport
->state
!= LPORT_ST_SCR
) {
1159 FC_DBG("Received a SCR response, but in state %s\n",
1160 fc_lport_state(lport
));
1165 fc_lport_error(lport
, fp
);
1169 op
= fc_frame_payload_op(fp
);
1170 if (op
== ELS_LS_ACC
)
1171 fc_lport_enter_ready(lport
);
1173 fc_lport_error(lport
, fp
);
1178 mutex_unlock(&lport
->lp_mutex
);
1182 * fc_lport_enter_scr - Send a State Change Register (SCR) request
1183 * @lport: Fibre Channel local port to register for state changes
1185 * Locking Note: The lport lock is expected to be held before calling
1188 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1190 struct fc_frame
*fp
;
1192 FC_DEBUG_LPORT("Port (%6x) entered SCR state from %s state\n",
1193 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
1195 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1197 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1199 fc_lport_error(lport
, fp
);
1203 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_SCR
,
1204 fc_lport_scr_resp
, lport
, lport
->e_d_tov
))
1205 fc_lport_error(lport
, fp
);
1209 * fc_lport_enter_rft_id - Register FC4-types with the name server
1210 * @lport: Fibre Channel local port to register
1212 * Locking Note: The lport lock is expected to be held before calling
1215 static void fc_lport_enter_rft_id(struct fc_lport
*lport
)
1217 struct fc_frame
*fp
;
1218 struct fc_ns_fts
*lps
;
1221 FC_DEBUG_LPORT("Port (%6x) entered RFT_ID state from %s state\n",
1222 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
1224 fc_lport_state_enter(lport
, LPORT_ST_RFT_ID
);
1227 i
= sizeof(lps
->ff_type_map
) / sizeof(lps
->ff_type_map
[0]);
1229 if (ntohl(lps
->ff_type_map
[i
]) != 0)
1232 /* nothing to register, move on to SCR */
1233 fc_lport_enter_scr(lport
);
1237 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1238 sizeof(struct fc_ns_rft
));
1240 fc_lport_error(lport
, fp
);
1244 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, FC_NS_RFT_ID
,
1245 fc_lport_rft_id_resp
,
1246 lport
, lport
->e_d_tov
))
1247 fc_lport_error(lport
, fp
);
1251 * fc_rport_enter_rft_id - Register port name with the name server
1252 * @lport: Fibre Channel local port to register
1254 * Locking Note: The lport lock is expected to be held before calling
1257 static void fc_lport_enter_rpn_id(struct fc_lport
*lport
)
1259 struct fc_frame
*fp
;
1261 FC_DEBUG_LPORT("Port (%6x) entered RPN_ID state from %s state\n",
1262 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
1264 fc_lport_state_enter(lport
, LPORT_ST_RPN_ID
);
1266 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1267 sizeof(struct fc_ns_rn_id
));
1269 fc_lport_error(lport
, fp
);
1273 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, FC_NS_RPN_ID
,
1274 fc_lport_rpn_id_resp
,
1275 lport
, lport
->e_d_tov
))
1276 fc_lport_error(lport
, fp
);
1279 static struct fc_rport_operations fc_lport_rport_ops
= {
1280 .event_callback
= fc_lport_rport_callback
,
1284 * fc_rport_enter_dns - Create a rport to the name server
1285 * @lport: Fibre Channel local port requesting a rport for the name server
1287 * Locking Note: The lport lock is expected to be held before calling
1290 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1292 struct fc_rport
*rport
;
1293 struct fc_rport_libfc_priv
*rdata
;
1294 struct fc_disc_port dp
;
1296 dp
.ids
.port_id
= FC_FID_DIR_SERV
;
1297 dp
.ids
.port_name
= -1;
1298 dp
.ids
.node_name
= -1;
1299 dp
.ids
.roles
= FC_RPORT_ROLE_UNKNOWN
;
1302 FC_DEBUG_LPORT("Port (%6x) entered DNS state from %s state\n",
1303 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
1305 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1307 rport
= fc_rport_rogue_create(&dp
);
1311 rdata
= rport
->dd_data
;
1312 rdata
->ops
= &fc_lport_rport_ops
;
1313 lport
->tt
.rport_login(rport
);
1317 fc_lport_error(lport
, NULL
);
1321 * fc_lport_timeout - Handler for the retry_work timer.
1322 * @work: The work struct of the fc_lport
1324 static void fc_lport_timeout(struct work_struct
*work
)
1326 struct fc_lport
*lport
=
1327 container_of(work
, struct fc_lport
,
1330 mutex_lock(&lport
->lp_mutex
);
1332 switch (lport
->state
) {
1334 case LPORT_ST_READY
:
1335 case LPORT_ST_RESET
:
1338 case LPORT_ST_FLOGI
:
1339 fc_lport_enter_flogi(lport
);
1342 fc_lport_enter_dns(lport
);
1344 case LPORT_ST_RPN_ID
:
1345 fc_lport_enter_rpn_id(lport
);
1347 case LPORT_ST_RFT_ID
:
1348 fc_lport_enter_rft_id(lport
);
1351 fc_lport_enter_scr(lport
);
1354 fc_lport_enter_logo(lport
);
1358 mutex_unlock(&lport
->lp_mutex
);
1362 * fc_lport_logo_resp - Handle response to LOGO request
1363 * @sp: current sequence in LOGO exchange
1364 * @fp: response frame
1365 * @lp_arg: Fibre Channel lport port instance that sent the LOGO request
1367 * Locking Note: This function will be called without the lport lock
1368 * held, but it will lock, call an _enter_* function or fc_lport_error
1369 * and then unlock the lport.
1371 static void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1374 struct fc_lport
*lport
= lp_arg
;
1377 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1380 mutex_lock(&lport
->lp_mutex
);
1382 FC_DEBUG_LPORT("Received a LOGO response\n");
1384 if (lport
->state
!= LPORT_ST_LOGO
) {
1385 FC_DBG("Received a LOGO response, but in state %s\n",
1386 fc_lport_state(lport
));
1391 fc_lport_error(lport
, fp
);
1395 op
= fc_frame_payload_op(fp
);
1396 if (op
== ELS_LS_ACC
)
1397 fc_lport_enter_reset(lport
);
1399 fc_lport_error(lport
, fp
);
1404 mutex_unlock(&lport
->lp_mutex
);
1408 * fc_rport_enter_logo - Logout of the fabric
1409 * @lport: Fibre Channel local port to be logged out
1411 * Locking Note: The lport lock is expected to be held before calling
1414 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1416 struct fc_frame
*fp
;
1417 struct fc_els_logo
*logo
;
1419 FC_DEBUG_LPORT("Port (%6x) entered LOGO state from %s state\n",
1420 fc_host_port_id(lport
->host
), fc_lport_state(lport
));
1422 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1424 /* DNS session should be closed so we can release it here */
1426 lport
->tt
.rport_logoff(lport
->dns_rp
);
1428 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1430 fc_lport_error(lport
, fp
);
1434 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_LOGO
, fc_lport_logo_resp
,
1435 lport
, lport
->e_d_tov
))
1436 fc_lport_error(lport
, fp
);
1440 * fc_lport_flogi_resp - Handle response to FLOGI request
1441 * @sp: current sequence in FLOGI exchange
1442 * @fp: response frame
1443 * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request
1445 * Locking Note: This function will be called without the lport lock
1446 * held, but it will lock, call an _enter_* function or fc_lport_error
1447 * and then unlock the lport.
1449 static void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1452 struct fc_lport
*lport
= lp_arg
;
1453 struct fc_frame_header
*fh
;
1454 struct fc_els_flogi
*flp
;
1457 unsigned int r_a_tov
;
1458 unsigned int e_d_tov
;
1461 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1464 mutex_lock(&lport
->lp_mutex
);
1466 FC_DEBUG_LPORT("Received a FLOGI response\n");
1468 if (lport
->state
!= LPORT_ST_FLOGI
) {
1469 FC_DBG("Received a FLOGI response, but in state %s\n",
1470 fc_lport_state(lport
));
1475 fc_lport_error(lport
, fp
);
1479 fh
= fc_frame_header_get(fp
);
1480 did
= ntoh24(fh
->fh_d_id
);
1481 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
!= 0) {
1483 FC_DEBUG_LPORT("Assigned fid %x\n", did
);
1484 fc_host_port_id(lport
->host
) = did
;
1486 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1488 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1490 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1493 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1494 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1495 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1496 if (csp_flags
& FC_SP_FT_EDTR
)
1498 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1499 if (e_d_tov
> lport
->e_d_tov
)
1500 lport
->e_d_tov
= e_d_tov
;
1501 lport
->r_a_tov
= 2 * e_d_tov
;
1502 FC_DBG("Point-to-Point mode\n");
1503 fc_lport_ptp_setup(lport
, ntoh24(fh
->fh_s_id
),
1509 lport
->e_d_tov
= e_d_tov
;
1510 lport
->r_a_tov
= r_a_tov
;
1511 fc_host_fabric_name(lport
->host
) =
1512 get_unaligned_be64(&flp
->fl_wwnn
);
1513 fc_lport_enter_dns(lport
);
1518 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1519 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1520 lport
->tt
.disc_start(fc_lport_disc_callback
,
1525 FC_DBG("bad FLOGI response\n");
1531 mutex_unlock(&lport
->lp_mutex
);
1535 * fc_rport_enter_flogi - Send a FLOGI request to the fabric manager
1536 * @lport: Fibre Channel local port to be logged in to the fabric
1538 * Locking Note: The lport lock is expected to be held before calling
1541 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1543 struct fc_frame
*fp
;
1545 FC_DEBUG_LPORT("Processing FLOGI state\n");
1547 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1549 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1551 return fc_lport_error(lport
, fp
);
1553 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_FLOGI
,
1554 fc_lport_flogi_resp
, lport
, lport
->e_d_tov
))
1555 fc_lport_error(lport
, fp
);
1558 /* Configure a fc_lport */
1559 int fc_lport_config(struct fc_lport
*lport
)
1561 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1562 mutex_init(&lport
->lp_mutex
);
1564 fc_lport_state_enter(lport
, LPORT_ST_NONE
);
1566 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1567 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1571 EXPORT_SYMBOL(fc_lport_config
);
1573 int fc_lport_init(struct fc_lport
*lport
)
1575 if (!lport
->tt
.lport_recv
)
1576 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1578 if (!lport
->tt
.lport_reset
)
1579 lport
->tt
.lport_reset
= fc_lport_reset
;
1581 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1582 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1583 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1584 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1585 memset(fc_host_supported_fc4s(lport
->host
), 0,
1586 sizeof(fc_host_supported_fc4s(lport
->host
)));
1587 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1588 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1590 /* This value is also unchanging */
1591 memset(fc_host_active_fc4s(lport
->host
), 0,
1592 sizeof(fc_host_active_fc4s(lport
->host
)));
1593 fc_host_active_fc4s(lport
->host
)[2] = 1;
1594 fc_host_active_fc4s(lport
->host
)[7] = 1;
1595 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1596 fc_host_supported_speeds(lport
->host
) = 0;
1597 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1598 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1599 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1600 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1604 EXPORT_SYMBOL(fc_lport_init
);