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 void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
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
*);
115 static const char *fc_lport_state_names
[] = {
116 [LPORT_ST_DISABLED
] = "disabled",
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",
127 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
134 * fc_lport_rport_callback() - Event handler for rport events
135 * @lport: The lport which is receiving the event
136 * @rport: The rport which the event has occured on
137 * @event: The event that occured
139 * Locking Note: The rport lock should not be held when calling
142 static void fc_lport_rport_callback(struct fc_lport
*lport
,
143 struct fc_rport
*rport
,
144 enum fc_rport_event event
)
146 FC_LPORT_DBG(lport
, "Received a %d event for port (%6x)\n", event
,
150 case RPORT_EV_CREATED
:
151 if (rport
->port_id
== FC_FID_DIR_SERV
) {
152 mutex_lock(&lport
->lp_mutex
);
153 if (lport
->state
== LPORT_ST_DNS
) {
154 lport
->dns_rp
= rport
;
155 fc_lport_enter_rpn_id(lport
);
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 "
161 "%d state", rport
->port_id
,
163 lport
->tt
.rport_logoff(rport
);
165 mutex_unlock(&lport
->lp_mutex
);
167 FC_LPORT_DBG(lport
, "Received an event for port (%6x) "
168 "which is not the directory server\n",
172 case RPORT_EV_FAILED
:
174 if (rport
->port_id
== FC_FID_DIR_SERV
) {
175 mutex_lock(&lport
->lp_mutex
);
176 lport
->dns_rp
= NULL
;
177 mutex_unlock(&lport
->lp_mutex
);
180 FC_LPORT_DBG(lport
, "Received an event for port (%6x) "
181 "which is not the directory server\n",
190 * fc_lport_state() - Return a string which represents the lport's state
191 * @lport: The lport whose state is to converted to a string
193 static const char *fc_lport_state(struct fc_lport
*lport
)
197 cp
= fc_lport_state_names
[lport
->state
];
204 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
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
210 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
211 u32 remote_fid
, u64 remote_wwpn
,
214 struct fc_disc_port dp
;
217 dp
.ids
.port_id
= remote_fid
;
218 dp
.ids
.port_name
= remote_wwpn
;
219 dp
.ids
.node_name
= remote_wwnn
;
220 dp
.ids
.roles
= FC_RPORT_ROLE_UNKNOWN
;
223 lport
->tt
.rport_logoff(lport
->ptp_rp
);
224 lport
->ptp_rp
= NULL
;
227 lport
->ptp_rp
= lport
->tt
.rport_create(&dp
);
229 lport
->tt
.rport_login(lport
->ptp_rp
);
231 fc_lport_enter_ready(lport
);
234 void fc_get_host_port_type(struct Scsi_Host
*shost
)
236 /* TODO - currently just NPORT */
237 fc_host_port_type(shost
) = FC_PORTTYPE_NPORT
;
239 EXPORT_SYMBOL(fc_get_host_port_type
);
241 void fc_get_host_port_state(struct Scsi_Host
*shost
)
243 struct fc_lport
*lp
= shost_priv(shost
);
246 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
248 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
250 EXPORT_SYMBOL(fc_get_host_port_state
);
252 void fc_get_host_speed(struct Scsi_Host
*shost
)
254 struct fc_lport
*lport
= shost_priv(shost
);
256 fc_host_speed(shost
) = lport
->link_speed
;
258 EXPORT_SYMBOL(fc_get_host_speed
);
260 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
262 struct fc_host_statistics
*fcoe_stats
;
263 struct fc_lport
*lp
= shost_priv(shost
);
264 struct timespec v0
, v1
;
267 fcoe_stats
= &lp
->host_stats
;
268 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
270 jiffies_to_timespec(jiffies
, &v0
);
271 jiffies_to_timespec(lp
->boot_time
, &v1
);
272 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
274 for_each_possible_cpu(cpu
) {
275 struct fcoe_dev_stats
*stats
;
277 stats
= per_cpu_ptr(lp
->dev_stats
, cpu
);
279 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
280 fcoe_stats
->tx_words
+= stats
->TxWords
;
281 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
282 fcoe_stats
->rx_words
+= stats
->RxWords
;
283 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
284 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
285 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
286 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
287 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
288 fcoe_stats
->fcp_input_megabytes
+= stats
->InputMegabytes
;
289 fcoe_stats
->fcp_output_megabytes
+= stats
->OutputMegabytes
;
290 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
292 fcoe_stats
->lip_count
= -1;
293 fcoe_stats
->nos_count
= -1;
294 fcoe_stats
->loss_of_sync_count
= -1;
295 fcoe_stats
->loss_of_signal_count
= -1;
296 fcoe_stats
->prim_seq_protocol_err_count
= -1;
297 fcoe_stats
->dumped_frames
= -1;
300 EXPORT_SYMBOL(fc_get_host_stats
);
303 * Fill in FLOGI command for request.
306 fc_lport_flogi_fill(struct fc_lport
*lport
, struct fc_els_flogi
*flogi
,
309 struct fc_els_csp
*sp
;
310 struct fc_els_cssp
*cp
;
312 memset(flogi
, 0, sizeof(*flogi
));
313 flogi
->fl_cmd
= (u8
) op
;
314 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
315 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
317 sp
->sp_hi_ver
= 0x20;
318 sp
->sp_lo_ver
= 0x20;
319 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
320 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
321 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
322 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
323 if (op
!= ELS_FLOGI
) {
324 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
325 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
326 sp
->sp_rel_off
= htons(0x1f);
327 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
329 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
330 cp
->cp_con_seq
= htons(255);
336 * Add a supported FC-4 type.
338 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
342 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
343 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
347 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
348 * @lport: Fibre Channel local port recieving the RLIR
349 * @sp: current sequence in the RLIR exchange
350 * @fp: RLIR request frame
352 * Locking Note: The lport lock is exected to be held before calling
355 static void fc_lport_recv_rlir_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
356 struct fc_lport
*lport
)
358 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
359 fc_lport_state(lport
));
361 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
366 * fc_lport_recv_echo_req() - Handle received ECHO request
367 * @lport: Fibre Channel local port recieving the ECHO
368 * @sp: current sequence in the ECHO exchange
369 * @fp: ECHO request frame
371 * Locking Note: The lport lock is exected to be held before calling
374 static void fc_lport_recv_echo_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
375 struct fc_lport
*lport
)
378 struct fc_exch
*ep
= fc_seq_exch(sp
);
384 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
385 fc_lport_state(lport
));
387 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
388 pp
= fc_frame_payload_get(in_fp
, len
);
390 if (len
< sizeof(__be32
))
391 len
= sizeof(__be32
);
393 fp
= fc_frame_alloc(lport
, len
);
395 dp
= fc_frame_payload_get(fp
, len
);
397 *((u32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
398 sp
= lport
->tt
.seq_start_next(sp
);
399 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
400 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
401 FC_TYPE_ELS
, f_ctl
, 0);
402 lport
->tt
.seq_send(lport
, sp
, fp
);
404 fc_frame_free(in_fp
);
408 * fc_lport_recv_echo_req() - Handle received Request Node ID data request
409 * @lport: Fibre Channel local port recieving the RNID
410 * @sp: current sequence in the RNID exchange
411 * @fp: RNID request frame
413 * Locking Note: The lport lock is exected to be held before calling
416 static void fc_lport_recv_rnid_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
417 struct fc_lport
*lport
)
420 struct fc_exch
*ep
= fc_seq_exch(sp
);
421 struct fc_els_rnid
*req
;
423 struct fc_els_rnid_resp rnid
;
424 struct fc_els_rnid_cid cid
;
425 struct fc_els_rnid_gen gen
;
427 struct fc_seq_els_data rjt_data
;
432 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
433 fc_lport_state(lport
));
435 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
438 rjt_data
.reason
= ELS_RJT_LOGIC
;
439 rjt_data
.explan
= ELS_EXPL_NONE
;
440 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
444 if (fmt
!= ELS_RNIDF_GEN
||
445 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
446 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
447 len
-= sizeof(rp
->gen
);
449 fp
= fc_frame_alloc(lport
, len
);
451 rp
= fc_frame_payload_get(fp
, len
);
453 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
454 rp
->rnid
.rnid_fmt
= fmt
;
455 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
456 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
457 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
458 if (fmt
== ELS_RNIDF_GEN
) {
459 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
460 memcpy(&rp
->gen
, &lport
->rnid_gen
,
463 sp
= lport
->tt
.seq_start_next(sp
);
464 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
465 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
466 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
467 FC_TYPE_ELS
, f_ctl
, 0);
468 lport
->tt
.seq_send(lport
, sp
, fp
);
471 fc_frame_free(in_fp
);
475 * fc_lport_recv_adisc_req() - Handle received Address Discovery Request
476 * @lport: Fibre Channel local port recieving the ADISC
477 * @sp: current sequence in the ADISC exchange
478 * @fp: ADISC request frame
480 * Locking Note: The lport lock is expected to be held before calling
483 static void fc_lport_recv_adisc_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
484 struct fc_lport
*lport
)
487 struct fc_exch
*ep
= fc_seq_exch(sp
);
488 struct fc_els_adisc
*req
, *rp
;
489 struct fc_seq_els_data rjt_data
;
493 FC_LPORT_DBG(lport
, "Received ADISC request while in state %s\n",
494 fc_lport_state(lport
));
496 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
499 rjt_data
.reason
= ELS_RJT_LOGIC
;
500 rjt_data
.explan
= ELS_EXPL_NONE
;
501 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
504 fp
= fc_frame_alloc(lport
, len
);
506 rp
= fc_frame_payload_get(fp
, len
);
508 rp
->adisc_cmd
= ELS_LS_ACC
;
509 rp
->adisc_wwpn
= htonll(lport
->wwpn
);
510 rp
->adisc_wwnn
= htonll(lport
->wwnn
);
511 hton24(rp
->adisc_port_id
,
512 fc_host_port_id(lport
->host
));
513 sp
= lport
->tt
.seq_start_next(sp
);
514 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
515 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
516 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
517 FC_TYPE_ELS
, f_ctl
, 0);
518 lport
->tt
.seq_send(lport
, sp
, fp
);
521 fc_frame_free(in_fp
);
525 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
526 * @lport: Fibre Channel local port recieving the LOGO
527 * @sp: current sequence in the LOGO exchange
528 * @fp: LOGO request frame
530 * Locking Note: The lport lock is exected to be held before calling
533 static void fc_lport_recv_logo_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
534 struct fc_lport
*lport
)
536 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
537 fc_lport_enter_reset(lport
);
542 * fc_fabric_login() - Start the lport state machine
543 * @lport: The lport that should log into the fabric
545 * Locking Note: This function should not be called
546 * with the lport lock held.
548 int fc_fabric_login(struct fc_lport
*lport
)
552 mutex_lock(&lport
->lp_mutex
);
553 if (lport
->state
== LPORT_ST_DISABLED
) {
554 fc_lport_enter_reset(lport
);
557 mutex_unlock(&lport
->lp_mutex
);
561 EXPORT_SYMBOL(fc_fabric_login
);
564 * fc_linkup() - Handler for transport linkup events
565 * @lport: The lport whose link is up
567 void fc_linkup(struct fc_lport
*lport
)
569 printk(KERN_INFO
"libfc: Link up on port (%6x)\n",
570 fc_host_port_id(lport
->host
));
572 mutex_lock(&lport
->lp_mutex
);
573 if (!lport
->link_up
) {
576 if (lport
->state
== LPORT_ST_RESET
)
577 fc_lport_enter_flogi(lport
);
579 mutex_unlock(&lport
->lp_mutex
);
581 EXPORT_SYMBOL(fc_linkup
);
584 * fc_linkdown() - Handler for transport linkdown events
585 * @lport: The lport whose link is down
587 void fc_linkdown(struct fc_lport
*lport
)
589 mutex_lock(&lport
->lp_mutex
);
590 printk(KERN_INFO
"libfc: Link down on port (%6x)\n",
591 fc_host_port_id(lport
->host
));
593 if (lport
->link_up
) {
595 fc_lport_enter_reset(lport
);
596 lport
->tt
.fcp_cleanup(lport
);
598 mutex_unlock(&lport
->lp_mutex
);
600 EXPORT_SYMBOL(fc_linkdown
);
603 * fc_fabric_logoff() - Logout of the fabric
604 * @lport: fc_lport pointer to logoff the fabric
607 * 0 for success, -1 for failure
609 int fc_fabric_logoff(struct fc_lport
*lport
)
611 lport
->tt
.disc_stop_final(lport
);
612 mutex_lock(&lport
->lp_mutex
);
614 lport
->tt
.rport_logoff(lport
->dns_rp
);
615 mutex_unlock(&lport
->lp_mutex
);
616 lport
->tt
.rport_flush_queue();
617 mutex_lock(&lport
->lp_mutex
);
618 fc_lport_enter_logo(lport
);
619 mutex_unlock(&lport
->lp_mutex
);
620 cancel_delayed_work_sync(&lport
->retry_work
);
623 EXPORT_SYMBOL(fc_fabric_logoff
);
626 * fc_lport_destroy() - unregister a fc_lport
627 * @lport: fc_lport pointer to unregister
632 * exit routine for fc_lport instance
633 * clean-up all the allocated memory
634 * and free up other system resources.
637 int fc_lport_destroy(struct fc_lport
*lport
)
639 mutex_lock(&lport
->lp_mutex
);
640 lport
->state
= LPORT_ST_DISABLED
;
642 lport
->tt
.frame_send
= fc_frame_drop
;
643 mutex_unlock(&lport
->lp_mutex
);
645 lport
->tt
.fcp_abort_io(lport
);
646 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
649 EXPORT_SYMBOL(fc_lport_destroy
);
652 * fc_set_mfs() - sets up the mfs for the corresponding fc_lport
653 * @lport: fc_lport pointer to unregister
654 * @mfs: the new mfs for fc_lport
656 * Set mfs for the given fc_lport to the new mfs.
658 * Return: 0 for success
660 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
662 unsigned int old_mfs
;
665 mutex_lock(&lport
->lp_mutex
);
667 old_mfs
= lport
->mfs
;
669 if (mfs
>= FC_MIN_MAX_FRAME
) {
671 if (mfs
> FC_MAX_FRAME
)
673 mfs
-= sizeof(struct fc_frame_header
);
678 if (!rc
&& mfs
< old_mfs
)
679 fc_lport_enter_reset(lport
);
681 mutex_unlock(&lport
->lp_mutex
);
685 EXPORT_SYMBOL(fc_set_mfs
);
688 * fc_lport_disc_callback() - Callback for discovery events
689 * @lport: FC local port
690 * @event: The discovery event
692 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
695 case DISC_EV_SUCCESS
:
696 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
699 printk(KERN_ERR
"libfc: Discovery failed for port (%6x)\n",
700 fc_host_port_id(lport
->host
));
701 mutex_lock(&lport
->lp_mutex
);
702 fc_lport_enter_reset(lport
);
703 mutex_unlock(&lport
->lp_mutex
);
712 * fc_rport_enter_ready() - Enter the ready state and start discovery
713 * @lport: Fibre Channel local port that is ready
715 * Locking Note: The lport lock is expected to be held before calling
718 static void fc_lport_enter_ready(struct fc_lport
*lport
)
720 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
721 fc_lport_state(lport
));
723 fc_lport_state_enter(lport
, LPORT_ST_READY
);
725 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
729 * fc_lport_recv_flogi_req() - Receive a FLOGI request
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
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.
738 * Locking Note: The lport lock is exected to be held before calling
741 static void fc_lport_recv_flogi_req(struct fc_seq
*sp_in
,
742 struct fc_frame
*rx_fp
,
743 struct fc_lport
*lport
)
746 struct fc_frame_header
*fh
;
749 struct fc_els_flogi
*flp
;
750 struct fc_els_flogi
*new_flp
;
756 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
757 fc_lport_state(lport
));
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
));
764 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
765 if (remote_wwpn
== lport
->wwpn
) {
766 printk(KERN_WARNING
"libfc: Received FLOGI from port "
767 "with same WWPN %llx\n", remote_wwpn
);
770 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %llx\n", remote_wwpn
);
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.
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
;
786 fc_host_port_id(lport
->host
) = local_fid
;
788 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
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
;
796 * Send the response. If this fails, the originator should
797 * repeat the sequence.
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
);
806 fc_lport_error(lport
, fp
);
808 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
809 get_unaligned_be64(&flp
->fl_wwnn
));
811 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
815 fc_frame_free(rx_fp
);
819 * fc_lport_recv_req() - The generic lport request handler
820 * @lport: The lport that received the request
821 * @sp: The sequence the request is on
822 * @fp: The frame the request is in
824 * This function will see if the lport handles the request or
825 * if an rport should handle the request.
827 * Locking Note: This function should not be called with the lport
828 * lock held becuase it will grab the lock.
830 static void fc_lport_recv_req(struct fc_lport
*lport
, struct fc_seq
*sp
,
833 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
834 void (*recv
) (struct fc_seq
*, struct fc_frame
*, struct fc_lport
*);
835 struct fc_rport
*rport
;
838 struct fc_seq_els_data rjt_data
;
840 mutex_lock(&lport
->lp_mutex
);
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.
847 if (fh
->fh_type
== FC_TYPE_ELS
&& fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
852 switch (fc_frame_payload_op(fp
)) {
854 recv
= fc_lport_recv_flogi_req
;
857 fh
= fc_frame_header_get(fp
);
858 if (ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
)
859 recv
= fc_lport_recv_logo_req
;
862 recv
= lport
->tt
.disc_recv_req
;
865 recv
= fc_lport_recv_echo_req
;
868 recv
= fc_lport_recv_rlir_req
;
871 recv
= fc_lport_recv_rnid_req
;
874 recv
= fc_lport_recv_adisc_req
;
883 * If this is a new incoming PLOGI, we won't find it.
885 s_id
= ntoh24(fh
->fh_s_id
);
886 d_id
= ntoh24(fh
->fh_d_id
);
888 rport
= lport
->tt
.rport_lookup(lport
, s_id
);
890 lport
->tt
.rport_recv_req(sp
, fp
, rport
);
893 rjt_data
.reason
= ELS_RJT_UNAB
;
894 rjt_data
.explan
= ELS_EXPL_NONE
;
895 lport
->tt
.seq_els_rsp_send(sp
,
902 FC_LPORT_DBG(lport
, "dropping invalid frame (eof %x)\n",
906 mutex_unlock(&lport
->lp_mutex
);
909 * The common exch_done for all request may not be good
910 * if any request requires longer hold on exhange. XXX
912 lport
->tt
.exch_done(sp
);
916 * fc_lport_reset() - Reset an lport
917 * @lport: The lport which should be reset
919 * Locking Note: This functions should not be called with the
922 int fc_lport_reset(struct fc_lport
*lport
)
924 cancel_delayed_work_sync(&lport
->retry_work
);
925 mutex_lock(&lport
->lp_mutex
);
926 fc_lport_enter_reset(lport
);
927 mutex_unlock(&lport
->lp_mutex
);
930 EXPORT_SYMBOL(fc_lport_reset
);
933 * fc_rport_enter_reset() - Reset the local port
934 * @lport: Fibre Channel local port to be reset
936 * Locking Note: The lport lock is expected to be held before calling
939 static void fc_lport_enter_reset(struct fc_lport
*lport
)
941 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
942 fc_lport_state(lport
));
944 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
947 lport
->tt
.rport_logoff(lport
->dns_rp
);
950 lport
->tt
.rport_logoff(lport
->ptp_rp
);
951 lport
->ptp_rp
= NULL
;
954 lport
->tt
.disc_stop(lport
);
956 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
957 fc_host_fabric_name(lport
->host
) = 0;
958 fc_host_port_id(lport
->host
) = 0;
961 fc_lport_enter_flogi(lport
);
965 * fc_lport_error() - Handler for any errors
966 * @lport: The fc_lport object
967 * @fp: The frame pointer
969 * If the error was caused by a resource allocation failure
970 * then wait for half a second and retry, otherwise retry
971 * after the e_d_tov time.
973 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
975 unsigned long delay
= 0;
976 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
977 PTR_ERR(fp
), fc_lport_state(lport
),
980 if (!fp
|| PTR_ERR(fp
) == -FC_EX_TIMEOUT
) {
982 * Memory allocation failure, or the exchange timed out.
985 if (lport
->retry_count
< lport
->max_retry_count
) {
986 lport
->retry_count
++;
988 delay
= msecs_to_jiffies(500);
990 delay
= msecs_to_jiffies(lport
->e_d_tov
);
992 schedule_delayed_work(&lport
->retry_work
, delay
);
994 switch (lport
->state
) {
995 case LPORT_ST_DISABLED
:
998 case LPORT_ST_RPN_ID
:
999 case LPORT_ST_RFT_ID
:
1002 case LPORT_ST_FLOGI
:
1004 fc_lport_enter_reset(lport
);
1012 * fc_lport_rft_id_resp() - Handle response to Register Fibre
1013 * Channel Types by ID (RPN_ID) request
1014 * @sp: current sequence in RPN_ID exchange
1015 * @fp: response frame
1016 * @lp_arg: Fibre Channel host port instance
1018 * Locking Note: This function will be called without the lport lock
1019 * held, but it will lock, call an _enter_* function or fc_lport_error
1020 * and then unlock the lport.
1022 static void fc_lport_rft_id_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1025 struct fc_lport
*lport
= lp_arg
;
1026 struct fc_frame_header
*fh
;
1027 struct fc_ct_hdr
*ct
;
1029 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1032 mutex_lock(&lport
->lp_mutex
);
1034 FC_LPORT_DBG(lport
, "Received a RFT_ID response\n");
1036 if (lport
->state
!= LPORT_ST_RFT_ID
) {
1037 FC_LPORT_DBG(lport
, "Received a RFT_ID response, but in state "
1038 "%s\n", fc_lport_state(lport
));
1045 fc_lport_error(lport
, fp
);
1049 fh
= fc_frame_header_get(fp
);
1050 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1052 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1053 ct
->ct_fs_type
== FC_FST_DIR
&&
1054 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1055 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1056 fc_lport_enter_scr(lport
);
1058 fc_lport_error(lport
, fp
);
1062 mutex_unlock(&lport
->lp_mutex
);
1066 * fc_lport_rpn_id_resp() - Handle response to Register Port
1067 * Name by ID (RPN_ID) request
1068 * @sp: current sequence in RPN_ID exchange
1069 * @fp: response frame
1070 * @lp_arg: Fibre Channel host port instance
1072 * Locking Note: This function will be called without the lport lock
1073 * held, but it will lock, call an _enter_* function or fc_lport_error
1074 * and then unlock the lport.
1076 static void fc_lport_rpn_id_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1079 struct fc_lport
*lport
= lp_arg
;
1080 struct fc_frame_header
*fh
;
1081 struct fc_ct_hdr
*ct
;
1083 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1086 mutex_lock(&lport
->lp_mutex
);
1088 FC_LPORT_DBG(lport
, "Received a RPN_ID response\n");
1090 if (lport
->state
!= LPORT_ST_RPN_ID
) {
1091 FC_LPORT_DBG(lport
, "Received a RPN_ID response, but in state "
1092 "%s\n", fc_lport_state(lport
));
1099 fc_lport_error(lport
, fp
);
1103 fh
= fc_frame_header_get(fp
);
1104 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1105 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1106 ct
->ct_fs_type
== FC_FST_DIR
&&
1107 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1108 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1109 fc_lport_enter_rft_id(lport
);
1111 fc_lport_error(lport
, fp
);
1116 mutex_unlock(&lport
->lp_mutex
);
1120 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1121 * @sp: current sequence in SCR exchange
1122 * @fp: response frame
1123 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1125 * Locking Note: This function will be called without the lport lock
1126 * held, but it will lock, call an _enter_* function or fc_lport_error
1127 * and then unlock the lport.
1129 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1132 struct fc_lport
*lport
= lp_arg
;
1135 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1138 mutex_lock(&lport
->lp_mutex
);
1140 FC_LPORT_DBG(lport
, "Received a SCR response\n");
1142 if (lport
->state
!= LPORT_ST_SCR
) {
1143 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1144 "%s\n", fc_lport_state(lport
));
1151 fc_lport_error(lport
, fp
);
1155 op
= fc_frame_payload_op(fp
);
1156 if (op
== ELS_LS_ACC
)
1157 fc_lport_enter_ready(lport
);
1159 fc_lport_error(lport
, fp
);
1164 mutex_unlock(&lport
->lp_mutex
);
1168 * fc_lport_enter_scr() - Send a State Change Register (SCR) request
1169 * @lport: Fibre Channel local port to register for state changes
1171 * Locking Note: The lport lock is expected to be held before calling
1174 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1176 struct fc_frame
*fp
;
1178 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1179 fc_lport_state(lport
));
1181 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1183 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1185 fc_lport_error(lport
, fp
);
1189 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_SCR
,
1190 fc_lport_scr_resp
, lport
, lport
->e_d_tov
))
1191 fc_lport_error(lport
, fp
);
1195 * fc_lport_enter_rft_id() - Register FC4-types with the name server
1196 * @lport: Fibre Channel local port to register
1198 * Locking Note: The lport lock is expected to be held before calling
1201 static void fc_lport_enter_rft_id(struct fc_lport
*lport
)
1203 struct fc_frame
*fp
;
1204 struct fc_ns_fts
*lps
;
1207 FC_LPORT_DBG(lport
, "Entered RFT_ID state from %s state\n",
1208 fc_lport_state(lport
));
1210 fc_lport_state_enter(lport
, LPORT_ST_RFT_ID
);
1213 i
= sizeof(lps
->ff_type_map
) / sizeof(lps
->ff_type_map
[0]);
1215 if (ntohl(lps
->ff_type_map
[i
]) != 0)
1218 /* nothing to register, move on to SCR */
1219 fc_lport_enter_scr(lport
);
1223 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1224 sizeof(struct fc_ns_rft
));
1226 fc_lport_error(lport
, fp
);
1230 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, FC_NS_RFT_ID
,
1231 fc_lport_rft_id_resp
,
1232 lport
, lport
->e_d_tov
))
1233 fc_lport_error(lport
, fp
);
1237 * fc_rport_enter_rft_id() - Register port name with the name server
1238 * @lport: Fibre Channel local port to register
1240 * Locking Note: The lport lock is expected to be held before calling
1243 static void fc_lport_enter_rpn_id(struct fc_lport
*lport
)
1245 struct fc_frame
*fp
;
1247 FC_LPORT_DBG(lport
, "Entered RPN_ID state from %s state\n",
1248 fc_lport_state(lport
));
1250 fc_lport_state_enter(lport
, LPORT_ST_RPN_ID
);
1252 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1253 sizeof(struct fc_ns_rn_id
));
1255 fc_lport_error(lport
, fp
);
1259 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, FC_NS_RPN_ID
,
1260 fc_lport_rpn_id_resp
,
1261 lport
, lport
->e_d_tov
))
1262 fc_lport_error(lport
, fp
);
1265 static struct fc_rport_operations fc_lport_rport_ops
= {
1266 .event_callback
= fc_lport_rport_callback
,
1270 * fc_rport_enter_dns() - Create a rport to the name server
1271 * @lport: Fibre Channel local port requesting a rport for the name server
1273 * Locking Note: The lport lock is expected to be held before calling
1276 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1278 struct fc_rport
*rport
;
1279 struct fc_rport_libfc_priv
*rdata
;
1280 struct fc_disc_port dp
;
1282 dp
.ids
.port_id
= FC_FID_DIR_SERV
;
1283 dp
.ids
.port_name
= -1;
1284 dp
.ids
.node_name
= -1;
1285 dp
.ids
.roles
= FC_RPORT_ROLE_UNKNOWN
;
1288 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1289 fc_lport_state(lport
));
1291 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1293 rport
= lport
->tt
.rport_create(&dp
);
1297 rdata
= rport
->dd_data
;
1298 rdata
->ops
= &fc_lport_rport_ops
;
1299 lport
->tt
.rport_login(rport
);
1303 fc_lport_error(lport
, NULL
);
1307 * fc_lport_timeout() - Handler for the retry_work timer.
1308 * @work: The work struct of the fc_lport
1310 static void fc_lport_timeout(struct work_struct
*work
)
1312 struct fc_lport
*lport
=
1313 container_of(work
, struct fc_lport
,
1316 mutex_lock(&lport
->lp_mutex
);
1318 switch (lport
->state
) {
1319 case LPORT_ST_DISABLED
:
1320 case LPORT_ST_READY
:
1321 case LPORT_ST_RESET
:
1324 case LPORT_ST_FLOGI
:
1325 fc_lport_enter_flogi(lport
);
1328 fc_lport_enter_dns(lport
);
1330 case LPORT_ST_RPN_ID
:
1331 fc_lport_enter_rpn_id(lport
);
1333 case LPORT_ST_RFT_ID
:
1334 fc_lport_enter_rft_id(lport
);
1337 fc_lport_enter_scr(lport
);
1340 fc_lport_enter_logo(lport
);
1344 mutex_unlock(&lport
->lp_mutex
);
1348 * fc_lport_logo_resp() - Handle response to LOGO request
1349 * @sp: current sequence in LOGO exchange
1350 * @fp: response frame
1351 * @lp_arg: Fibre Channel lport port instance that sent the LOGO request
1353 * Locking Note: This function will be called without the lport lock
1354 * held, but it will lock, call an _enter_* function or fc_lport_error
1355 * and then unlock the lport.
1357 static void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1360 struct fc_lport
*lport
= lp_arg
;
1363 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1366 mutex_lock(&lport
->lp_mutex
);
1368 FC_LPORT_DBG(lport
, "Received a LOGO response\n");
1370 if (lport
->state
!= LPORT_ST_LOGO
) {
1371 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1372 "%s\n", fc_lport_state(lport
));
1379 fc_lport_error(lport
, fp
);
1383 op
= fc_frame_payload_op(fp
);
1384 if (op
== ELS_LS_ACC
)
1385 fc_lport_enter_reset(lport
);
1387 fc_lport_error(lport
, fp
);
1392 mutex_unlock(&lport
->lp_mutex
);
1396 * fc_rport_enter_logo() - Logout of the fabric
1397 * @lport: Fibre Channel local port to be logged out
1399 * Locking Note: The lport lock is expected to be held before calling
1402 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1404 struct fc_frame
*fp
;
1405 struct fc_els_logo
*logo
;
1407 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1408 fc_lport_state(lport
));
1410 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1412 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1414 fc_lport_error(lport
, fp
);
1418 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_LOGO
, fc_lport_logo_resp
,
1419 lport
, lport
->e_d_tov
))
1420 fc_lport_error(lport
, fp
);
1424 * fc_lport_flogi_resp() - Handle response to FLOGI request
1425 * @sp: current sequence in FLOGI exchange
1426 * @fp: response frame
1427 * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request
1429 * Locking Note: This function will be called without the lport lock
1430 * held, but it will lock, call an _enter_* function or fc_lport_error
1431 * and then unlock the lport.
1433 static void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1436 struct fc_lport
*lport
= lp_arg
;
1437 struct fc_frame_header
*fh
;
1438 struct fc_els_flogi
*flp
;
1441 unsigned int r_a_tov
;
1442 unsigned int e_d_tov
;
1445 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1448 mutex_lock(&lport
->lp_mutex
);
1450 FC_LPORT_DBG(lport
, "Received a FLOGI response\n");
1452 if (lport
->state
!= LPORT_ST_FLOGI
) {
1453 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1454 "%s\n", fc_lport_state(lport
));
1461 fc_lport_error(lport
, fp
);
1465 fh
= fc_frame_header_get(fp
);
1466 did
= ntoh24(fh
->fh_d_id
);
1467 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
!= 0) {
1469 printk(KERN_INFO
"libfc: Assigned FID (%6x) in FLOGI response\n",
1471 fc_host_port_id(lport
->host
) = did
;
1473 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1475 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1477 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1480 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1481 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1482 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1483 if (csp_flags
& FC_SP_FT_EDTR
)
1485 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1486 if (e_d_tov
> lport
->e_d_tov
)
1487 lport
->e_d_tov
= e_d_tov
;
1488 lport
->r_a_tov
= 2 * e_d_tov
;
1489 printk(KERN_INFO
"libfc: Port (%6x) entered "
1490 "point to point mode\n", did
);
1491 fc_lport_ptp_setup(lport
, ntoh24(fh
->fh_s_id
),
1497 lport
->e_d_tov
= e_d_tov
;
1498 lport
->r_a_tov
= r_a_tov
;
1499 fc_host_fabric_name(lport
->host
) =
1500 get_unaligned_be64(&flp
->fl_wwnn
);
1501 fc_lport_enter_dns(lport
);
1506 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1507 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1508 lport
->tt
.disc_start(fc_lport_disc_callback
,
1513 FC_LPORT_DBG(lport
, "Bad FLOGI response\n");
1519 mutex_unlock(&lport
->lp_mutex
);
1523 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1524 * @lport: Fibre Channel local port to be logged in to the fabric
1526 * Locking Note: The lport lock is expected to be held before calling
1529 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1531 struct fc_frame
*fp
;
1533 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1534 fc_lport_state(lport
));
1536 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1538 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1540 return fc_lport_error(lport
, fp
);
1542 if (!lport
->tt
.elsct_send(lport
, NULL
, fp
, ELS_FLOGI
,
1543 fc_lport_flogi_resp
, lport
, lport
->e_d_tov
))
1544 fc_lport_error(lport
, fp
);
1547 /* Configure a fc_lport */
1548 int fc_lport_config(struct fc_lport
*lport
)
1550 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1551 mutex_init(&lport
->lp_mutex
);
1553 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1555 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1556 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1560 EXPORT_SYMBOL(fc_lport_config
);
1562 int fc_lport_init(struct fc_lport
*lport
)
1564 if (!lport
->tt
.lport_recv
)
1565 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1567 if (!lport
->tt
.lport_reset
)
1568 lport
->tt
.lport_reset
= fc_lport_reset
;
1570 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1571 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1572 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1573 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1574 memset(fc_host_supported_fc4s(lport
->host
), 0,
1575 sizeof(fc_host_supported_fc4s(lport
->host
)));
1576 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1577 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1579 /* This value is also unchanging */
1580 memset(fc_host_active_fc4s(lport
->host
), 0,
1581 sizeof(fc_host_active_fc4s(lport
->host
)));
1582 fc_host_active_fc4s(lport
->host
)[2] = 1;
1583 fc_host_active_fc4s(lport
->host
)[7] = 1;
1584 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1585 fc_host_supported_speeds(lport
->host
) = 0;
1586 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1587 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1588 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1589 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1593 EXPORT_SYMBOL(fc_lport_init
);