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>
97 #include <linux/scatterlist.h>
101 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
102 #define FC_LOCAL_PTP_FID_LO 0x010101
103 #define FC_LOCAL_PTP_FID_HI 0x010102
105 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
107 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
109 static void fc_lport_enter_reset(struct fc_lport
*);
110 static void fc_lport_enter_flogi(struct fc_lport
*);
111 static void fc_lport_enter_dns(struct fc_lport
*);
112 static void fc_lport_enter_ns(struct fc_lport
*, enum fc_lport_state
);
113 static void fc_lport_enter_scr(struct fc_lport
*);
114 static void fc_lport_enter_ready(struct fc_lport
*);
115 static void fc_lport_enter_logo(struct fc_lport
*);
117 static const char *fc_lport_state_names
[] = {
118 [LPORT_ST_DISABLED
] = "disabled",
119 [LPORT_ST_FLOGI
] = "FLOGI",
120 [LPORT_ST_DNS
] = "dNS",
121 [LPORT_ST_RNN_ID
] = "RNN_ID",
122 [LPORT_ST_RSNN_NN
] = "RSNN_NN",
123 [LPORT_ST_RSPN_ID
] = "RSPN_ID",
124 [LPORT_ST_RFT_ID
] = "RFT_ID",
125 [LPORT_ST_RFF_ID
] = "RFF_ID",
126 [LPORT_ST_SCR
] = "SCR",
127 [LPORT_ST_READY
] = "Ready",
128 [LPORT_ST_LOGO
] = "LOGO",
129 [LPORT_ST_RESET
] = "reset",
133 * struct fc_bsg_info - FC Passthrough managemet structure
134 * @job: The passthrough job
135 * @lport: The local port to pass through a command
136 * @rsp_code: The expected response code
137 * @sg: job->reply_payload.sg_list
138 * @nents: job->reply_payload.sg_cnt
139 * @offset: The offset into the response data
142 struct fc_bsg_job
*job
;
143 struct fc_lport
*lport
;
145 struct scatterlist
*sg
;
151 * fc_frame_drop() - Dummy frame handler
152 * @lport: The local port the frame was received on
153 * @fp: The received frame
155 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
162 * fc_lport_rport_callback() - Event handler for rport events
163 * @lport: The lport which is receiving the event
164 * @rdata: private remote port data
165 * @event: The event that occured
167 * Locking Note: The rport lock should not be held when calling
170 static void fc_lport_rport_callback(struct fc_lport
*lport
,
171 struct fc_rport_priv
*rdata
,
172 enum fc_rport_event event
)
174 FC_LPORT_DBG(lport
, "Received a %d event for port (%6x)\n", event
,
177 mutex_lock(&lport
->lp_mutex
);
180 if (lport
->state
== LPORT_ST_DNS
) {
181 lport
->dns_rdata
= rdata
;
182 fc_lport_enter_ns(lport
, LPORT_ST_RNN_ID
);
184 FC_LPORT_DBG(lport
, "Received an READY event "
185 "on port (%6x) for the directory "
186 "server, but the lport is not "
187 "in the DNS state, it's in the "
188 "%d state", rdata
->ids
.port_id
,
190 lport
->tt
.rport_logoff(rdata
);
194 case RPORT_EV_FAILED
:
196 lport
->dns_rdata
= NULL
;
201 mutex_unlock(&lport
->lp_mutex
);
205 * fc_lport_state() - Return a string which represents the lport's state
206 * @lport: The lport whose state is to converted to a string
208 static const char *fc_lport_state(struct fc_lport
*lport
)
212 cp
= fc_lport_state_names
[lport
->state
];
219 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
220 * @lport: The lport to attach the ptp rport to
221 * @remote_fid: The FID of the ptp rport
222 * @remote_wwpn: The WWPN of the ptp rport
223 * @remote_wwnn: The WWNN of the ptp rport
225 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
226 u32 remote_fid
, u64 remote_wwpn
,
229 mutex_lock(&lport
->disc
.disc_mutex
);
230 if (lport
->ptp_rdata
)
231 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
232 lport
->ptp_rdata
= lport
->tt
.rport_create(lport
, remote_fid
);
233 lport
->ptp_rdata
->ids
.port_name
= remote_wwpn
;
234 lport
->ptp_rdata
->ids
.node_name
= remote_wwnn
;
235 mutex_unlock(&lport
->disc
.disc_mutex
);
237 lport
->tt
.rport_login(lport
->ptp_rdata
);
239 fc_lport_enter_ready(lport
);
243 * fc_get_host_port_type() - Return the port type of the given Scsi_Host
244 * @shost: The SCSI host whose port type is to be determined
246 void fc_get_host_port_type(struct Scsi_Host
*shost
)
248 /* TODO - currently just NPORT */
249 fc_host_port_type(shost
) = FC_PORTTYPE_NPORT
;
251 EXPORT_SYMBOL(fc_get_host_port_type
);
254 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
255 * @shost: The SCSI host whose port state is to be determined
257 void fc_get_host_port_state(struct Scsi_Host
*shost
)
259 struct fc_lport
*lport
= shost_priv(shost
);
261 mutex_lock(&lport
->lp_mutex
);
263 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
265 switch (lport
->state
) {
267 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
270 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
272 mutex_unlock(&lport
->lp_mutex
);
274 EXPORT_SYMBOL(fc_get_host_port_state
);
277 * fc_get_host_speed() - Return the speed of the given Scsi_Host
278 * @shost: The SCSI host whose port speed is to be determined
280 void fc_get_host_speed(struct Scsi_Host
*shost
)
282 struct fc_lport
*lport
= shost_priv(shost
);
284 fc_host_speed(shost
) = lport
->link_speed
;
286 EXPORT_SYMBOL(fc_get_host_speed
);
289 * fc_get_host_stats() - Return the Scsi_Host's statistics
290 * @shost: The SCSI host whose statistics are to be returned
292 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
294 struct fc_host_statistics
*fcoe_stats
;
295 struct fc_lport
*lport
= shost_priv(shost
);
296 struct timespec v0
, v1
;
299 fcoe_stats
= &lport
->host_stats
;
300 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
302 jiffies_to_timespec(jiffies
, &v0
);
303 jiffies_to_timespec(lport
->boot_time
, &v1
);
304 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
306 for_each_possible_cpu(cpu
) {
307 struct fcoe_dev_stats
*stats
;
309 stats
= per_cpu_ptr(lport
->dev_stats
, cpu
);
311 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
312 fcoe_stats
->tx_words
+= stats
->TxWords
;
313 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
314 fcoe_stats
->rx_words
+= stats
->RxWords
;
315 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
316 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
317 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
318 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
319 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
320 fcoe_stats
->fcp_input_megabytes
+= stats
->InputMegabytes
;
321 fcoe_stats
->fcp_output_megabytes
+= stats
->OutputMegabytes
;
322 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
324 fcoe_stats
->lip_count
= -1;
325 fcoe_stats
->nos_count
= -1;
326 fcoe_stats
->loss_of_sync_count
= -1;
327 fcoe_stats
->loss_of_signal_count
= -1;
328 fcoe_stats
->prim_seq_protocol_err_count
= -1;
329 fcoe_stats
->dumped_frames
= -1;
332 EXPORT_SYMBOL(fc_get_host_stats
);
335 * fc_lport_flogi_fill() - Fill in FLOGI command for request
336 * @lport: The local port the FLOGI is for
337 * @flogi: The FLOGI command
340 static void fc_lport_flogi_fill(struct fc_lport
*lport
,
341 struct fc_els_flogi
*flogi
,
344 struct fc_els_csp
*sp
;
345 struct fc_els_cssp
*cp
;
347 memset(flogi
, 0, sizeof(*flogi
));
348 flogi
->fl_cmd
= (u8
) op
;
349 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
350 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
352 sp
->sp_hi_ver
= 0x20;
353 sp
->sp_lo_ver
= 0x20;
354 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
355 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
356 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
357 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
358 if (op
!= ELS_FLOGI
) {
359 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
360 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
361 sp
->sp_rel_off
= htons(0x1f);
362 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
364 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
365 cp
->cp_con_seq
= htons(255);
371 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
372 * @lport: The local port to add a new FC-4 type to
373 * @type: The new FC-4 type
375 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
379 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
380 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
384 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
385 * @sp: The sequence in the RLIR exchange
386 * @fp: The RLIR request frame
387 * @lport: Fibre Channel local port recieving the RLIR
389 * Locking Note: The lport lock is expected to be held before calling
392 static void fc_lport_recv_rlir_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
393 struct fc_lport
*lport
)
395 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
396 fc_lport_state(lport
));
398 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
403 * fc_lport_recv_echo_req() - Handle received ECHO request
404 * @sp: The sequence in the ECHO exchange
405 * @fp: ECHO request frame
406 * @lport: The local port recieving the ECHO
408 * Locking Note: The lport lock is expected to be held before calling
411 static void fc_lport_recv_echo_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
412 struct fc_lport
*lport
)
415 struct fc_exch
*ep
= fc_seq_exch(sp
);
421 FC_LPORT_DBG(lport
, "Received ECHO request while in state %s\n",
422 fc_lport_state(lport
));
424 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
425 pp
= fc_frame_payload_get(in_fp
, len
);
427 if (len
< sizeof(__be32
))
428 len
= sizeof(__be32
);
430 fp
= fc_frame_alloc(lport
, len
);
432 dp
= fc_frame_payload_get(fp
, len
);
434 *((__be32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
435 sp
= lport
->tt
.seq_start_next(sp
);
436 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
437 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
438 FC_TYPE_ELS
, f_ctl
, 0);
439 lport
->tt
.seq_send(lport
, sp
, fp
);
441 fc_frame_free(in_fp
);
445 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
446 * @sp: The sequence in the RNID exchange
447 * @fp: The RNID request frame
448 * @lport: The local port recieving the RNID
450 * Locking Note: The lport lock is expected to be held before calling
453 static void fc_lport_recv_rnid_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
454 struct fc_lport
*lport
)
457 struct fc_exch
*ep
= fc_seq_exch(sp
);
458 struct fc_els_rnid
*req
;
460 struct fc_els_rnid_resp rnid
;
461 struct fc_els_rnid_cid cid
;
462 struct fc_els_rnid_gen gen
;
464 struct fc_seq_els_data rjt_data
;
469 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
470 fc_lport_state(lport
));
472 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
475 rjt_data
.reason
= ELS_RJT_LOGIC
;
476 rjt_data
.explan
= ELS_EXPL_NONE
;
477 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
481 if (fmt
!= ELS_RNIDF_GEN
||
482 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
483 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
484 len
-= sizeof(rp
->gen
);
486 fp
= fc_frame_alloc(lport
, len
);
488 rp
= fc_frame_payload_get(fp
, len
);
490 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
491 rp
->rnid
.rnid_fmt
= fmt
;
492 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
493 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
494 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
495 if (fmt
== ELS_RNIDF_GEN
) {
496 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
497 memcpy(&rp
->gen
, &lport
->rnid_gen
,
500 sp
= lport
->tt
.seq_start_next(sp
);
501 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
502 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
503 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
504 FC_TYPE_ELS
, f_ctl
, 0);
505 lport
->tt
.seq_send(lport
, sp
, fp
);
508 fc_frame_free(in_fp
);
512 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
513 * @sp: The sequence in the LOGO exchange
514 * @fp: The LOGO request frame
515 * @lport: The local port recieving the LOGO
517 * Locking Note: The lport lock is exected to be held before calling
520 static void fc_lport_recv_logo_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
521 struct fc_lport
*lport
)
523 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
524 fc_lport_enter_reset(lport
);
529 * fc_fabric_login() - Start the lport state machine
530 * @lport: The local port that should log into the fabric
532 * Locking Note: This function should not be called
533 * with the lport lock held.
535 int fc_fabric_login(struct fc_lport
*lport
)
539 mutex_lock(&lport
->lp_mutex
);
540 if (lport
->state
== LPORT_ST_DISABLED
) {
541 fc_lport_enter_reset(lport
);
544 mutex_unlock(&lport
->lp_mutex
);
548 EXPORT_SYMBOL(fc_fabric_login
);
551 * __fc_linkup() - Handler for transport linkup events
552 * @lport: The lport whose link is up
554 * Locking: must be called with the lp_mutex held
556 void __fc_linkup(struct fc_lport
*lport
)
558 if (!lport
->link_up
) {
561 if (lport
->state
== LPORT_ST_RESET
)
562 fc_lport_enter_flogi(lport
);
567 * fc_linkup() - Handler for transport linkup events
568 * @lport: The local port whose link is up
570 void fc_linkup(struct fc_lport
*lport
)
572 printk(KERN_INFO
"host%d: libfc: Link up on port (%6x)\n",
573 lport
->host
->host_no
, fc_host_port_id(lport
->host
));
575 mutex_lock(&lport
->lp_mutex
);
577 mutex_unlock(&lport
->lp_mutex
);
579 EXPORT_SYMBOL(fc_linkup
);
582 * __fc_linkdown() - Handler for transport linkdown events
583 * @lport: The lport whose link is down
585 * Locking: must be called with the lp_mutex held
587 void __fc_linkdown(struct fc_lport
*lport
)
589 if (lport
->link_up
) {
591 fc_lport_enter_reset(lport
);
592 lport
->tt
.fcp_cleanup(lport
);
597 * fc_linkdown() - Handler for transport linkdown events
598 * @lport: The local port whose link is down
600 void fc_linkdown(struct fc_lport
*lport
)
602 printk(KERN_INFO
"host%d: libfc: Link down on port (%6x)\n",
603 lport
->host
->host_no
, fc_host_port_id(lport
->host
));
605 mutex_lock(&lport
->lp_mutex
);
606 __fc_linkdown(lport
);
607 mutex_unlock(&lport
->lp_mutex
);
609 EXPORT_SYMBOL(fc_linkdown
);
612 * fc_fabric_logoff() - Logout of the fabric
613 * @lport: The local port to logoff the fabric
616 * 0 for success, -1 for failure
618 int fc_fabric_logoff(struct fc_lport
*lport
)
620 lport
->tt
.disc_stop_final(lport
);
621 mutex_lock(&lport
->lp_mutex
);
622 if (lport
->dns_rdata
)
623 lport
->tt
.rport_logoff(lport
->dns_rdata
);
624 mutex_unlock(&lport
->lp_mutex
);
625 lport
->tt
.rport_flush_queue();
626 mutex_lock(&lport
->lp_mutex
);
627 fc_lport_enter_logo(lport
);
628 mutex_unlock(&lport
->lp_mutex
);
629 cancel_delayed_work_sync(&lport
->retry_work
);
632 EXPORT_SYMBOL(fc_fabric_logoff
);
635 * fc_lport_destroy() - Unregister a fc_lport
636 * @lport: The local port to unregister
639 * exit routine for fc_lport instance
640 * clean-up all the allocated memory
641 * and free up other system resources.
644 int fc_lport_destroy(struct fc_lport
*lport
)
646 mutex_lock(&lport
->lp_mutex
);
647 lport
->state
= LPORT_ST_DISABLED
;
649 lport
->tt
.frame_send
= fc_frame_drop
;
650 mutex_unlock(&lport
->lp_mutex
);
652 lport
->tt
.fcp_abort_io(lport
);
653 lport
->tt
.disc_stop_final(lport
);
654 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
657 EXPORT_SYMBOL(fc_lport_destroy
);
660 * fc_set_mfs() - Set the maximum frame size for a local port
661 * @lport: The local port to set the MFS for
664 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
666 unsigned int old_mfs
;
669 mutex_lock(&lport
->lp_mutex
);
671 old_mfs
= lport
->mfs
;
673 if (mfs
>= FC_MIN_MAX_FRAME
) {
675 if (mfs
> FC_MAX_FRAME
)
677 mfs
-= sizeof(struct fc_frame_header
);
682 if (!rc
&& mfs
< old_mfs
)
683 fc_lport_enter_reset(lport
);
685 mutex_unlock(&lport
->lp_mutex
);
689 EXPORT_SYMBOL(fc_set_mfs
);
692 * fc_lport_disc_callback() - Callback for discovery events
693 * @lport: The local port receiving the event
694 * @event: The discovery event
696 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
699 case DISC_EV_SUCCESS
:
700 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
703 printk(KERN_ERR
"host%d: libfc: "
704 "Discovery failed for port (%6x)\n",
705 lport
->host
->host_no
, fc_host_port_id(lport
->host
));
706 mutex_lock(&lport
->lp_mutex
);
707 fc_lport_enter_reset(lport
);
708 mutex_unlock(&lport
->lp_mutex
);
717 * fc_rport_enter_ready() - Enter the ready state and start discovery
718 * @lport: The local port that is ready
720 * Locking Note: The lport lock is expected to be held before calling
723 static void fc_lport_enter_ready(struct fc_lport
*lport
)
725 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
726 fc_lport_state(lport
));
728 fc_lport_state_enter(lport
, LPORT_ST_READY
);
730 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
731 fc_vports_linkchange(lport
);
733 if (!lport
->ptp_rdata
)
734 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
738 * fc_lport_set_port_id() - set the local port Port ID
739 * @lport: The local port which will have its Port ID set.
740 * @port_id: The new port ID.
741 * @fp: The frame containing the incoming request, or NULL.
743 * Locking Note: The lport lock is expected to be held before calling
746 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
750 printk(KERN_INFO
"host%d: Assigned Port ID %6x\n",
751 lport
->host
->host_no
, port_id
);
753 fc_host_port_id(lport
->host
) = port_id
;
754 if (lport
->tt
.lport_set_port_id
)
755 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
759 * fc_lport_recv_flogi_req() - Receive a FLOGI request
760 * @sp_in: The sequence the FLOGI is on
761 * @rx_fp: The FLOGI frame
762 * @lport: The local port that recieved the request
764 * A received FLOGI request indicates a point-to-point connection.
765 * Accept it with the common service parameters indicating our N port.
766 * Set up to do a PLOGI if we have the higher-number WWPN.
768 * Locking Note: The lport lock is expected to be held before calling
771 static void fc_lport_recv_flogi_req(struct fc_seq
*sp_in
,
772 struct fc_frame
*rx_fp
,
773 struct fc_lport
*lport
)
776 struct fc_frame_header
*fh
;
779 struct fc_els_flogi
*flp
;
780 struct fc_els_flogi
*new_flp
;
786 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
787 fc_lport_state(lport
));
789 fh
= fc_frame_header_get(rx_fp
);
790 remote_fid
= ntoh24(fh
->fh_s_id
);
791 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
794 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
795 if (remote_wwpn
== lport
->wwpn
) {
796 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
797 "with same WWPN %llx\n",
798 lport
->host
->host_no
, remote_wwpn
);
801 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %llx\n", remote_wwpn
);
804 * XXX what is the right thing to do for FIDs?
805 * The originator might expect our S_ID to be 0xfffffe.
806 * But if so, both of us could end up with the same FID.
808 local_fid
= FC_LOCAL_PTP_FID_LO
;
809 if (remote_wwpn
< lport
->wwpn
) {
810 local_fid
= FC_LOCAL_PTP_FID_HI
;
811 if (!remote_fid
|| remote_fid
== local_fid
)
812 remote_fid
= FC_LOCAL_PTP_FID_LO
;
813 } else if (!remote_fid
) {
814 remote_fid
= FC_LOCAL_PTP_FID_HI
;
817 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
819 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
821 sp
= lport
->tt
.seq_start_next(fr_seq(rx_fp
));
822 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
823 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
824 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
827 * Send the response. If this fails, the originator should
828 * repeat the sequence.
830 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
831 ep
= fc_seq_exch(sp
);
832 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
833 FC_TYPE_ELS
, f_ctl
, 0);
834 lport
->tt
.seq_send(lport
, sp
, fp
);
837 fc_lport_error(lport
, fp
);
839 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
840 get_unaligned_be64(&flp
->fl_wwnn
));
844 fc_frame_free(rx_fp
);
848 * fc_lport_recv_req() - The generic lport request handler
849 * @lport: The local port that received the request
850 * @sp: The sequence the request is on
851 * @fp: The request frame
853 * This function will see if the lport handles the request or
854 * if an rport should handle the request.
856 * Locking Note: This function should not be called with the lport
857 * lock held becuase it will grab the lock.
859 static void fc_lport_recv_req(struct fc_lport
*lport
, struct fc_seq
*sp
,
862 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
863 void (*recv
) (struct fc_seq
*, struct fc_frame
*, struct fc_lport
*);
865 mutex_lock(&lport
->lp_mutex
);
868 * Handle special ELS cases like FLOGI, LOGO, and
869 * RSCN here. These don't require a session.
870 * Even if we had a session, it might not be ready.
874 else if (fh
->fh_type
== FC_TYPE_ELS
&&
875 fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
879 recv
= lport
->tt
.rport_recv_req
;
880 switch (fc_frame_payload_op(fp
)) {
882 recv
= fc_lport_recv_flogi_req
;
885 fh
= fc_frame_header_get(fp
);
886 if (ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
)
887 recv
= fc_lport_recv_logo_req
;
890 recv
= lport
->tt
.disc_recv_req
;
893 recv
= fc_lport_recv_echo_req
;
896 recv
= fc_lport_recv_rlir_req
;
899 recv
= fc_lport_recv_rnid_req
;
905 FC_LPORT_DBG(lport
, "dropping invalid frame (eof %x)\n",
909 mutex_unlock(&lport
->lp_mutex
);
912 * The common exch_done for all request may not be good
913 * if any request requires longer hold on exhange. XXX
915 lport
->tt
.exch_done(sp
);
919 * fc_lport_reset() - Reset a local port
920 * @lport: The local port which should be reset
922 * Locking Note: This functions should not be called with the
925 int fc_lport_reset(struct fc_lport
*lport
)
927 cancel_delayed_work_sync(&lport
->retry_work
);
928 mutex_lock(&lport
->lp_mutex
);
929 fc_lport_enter_reset(lport
);
930 mutex_unlock(&lport
->lp_mutex
);
933 EXPORT_SYMBOL(fc_lport_reset
);
936 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
937 * @lport: The local port to be reset
939 * Locking Note: The lport lock is expected to be held before calling
942 static void fc_lport_reset_locked(struct fc_lport
*lport
)
944 if (lport
->dns_rdata
)
945 lport
->tt
.rport_logoff(lport
->dns_rdata
);
947 lport
->ptp_rdata
= NULL
;
949 lport
->tt
.disc_stop(lport
);
951 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
952 fc_host_fabric_name(lport
->host
) = 0;
954 if (fc_host_port_id(lport
->host
))
955 fc_lport_set_port_id(lport
, 0, NULL
);
959 * fc_lport_enter_reset() - Reset the local port
960 * @lport: The local port to be reset
962 * Locking Note: The lport lock is expected to be held before calling
965 static void fc_lport_enter_reset(struct fc_lport
*lport
)
967 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
968 fc_lport_state(lport
));
972 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
974 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
976 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
977 fc_vports_linkchange(lport
);
978 fc_lport_reset_locked(lport
);
980 fc_lport_enter_flogi(lport
);
984 * fc_lport_enter_disabled() - Disable the local port
985 * @lport: The local port to be reset
987 * Locking Note: The lport lock is expected to be held before calling
990 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
992 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
993 fc_lport_state(lport
));
995 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
996 fc_vports_linkchange(lport
);
997 fc_lport_reset_locked(lport
);
1001 * fc_lport_error() - Handler for any errors
1002 * @lport: The local port that the error was on
1003 * @fp: The error code encoded in a frame pointer
1005 * If the error was caused by a resource allocation failure
1006 * then wait for half a second and retry, otherwise retry
1007 * after the e_d_tov time.
1009 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1011 unsigned long delay
= 0;
1012 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1013 PTR_ERR(fp
), fc_lport_state(lport
),
1014 lport
->retry_count
);
1016 if (!fp
|| PTR_ERR(fp
) == -FC_EX_TIMEOUT
) {
1018 * Memory allocation failure, or the exchange timed out.
1021 if (lport
->retry_count
< lport
->max_retry_count
) {
1022 lport
->retry_count
++;
1024 delay
= msecs_to_jiffies(500);
1026 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1028 schedule_delayed_work(&lport
->retry_work
, delay
);
1030 switch (lport
->state
) {
1031 case LPORT_ST_DISABLED
:
1032 case LPORT_ST_READY
:
1033 case LPORT_ST_RESET
:
1034 case LPORT_ST_RNN_ID
:
1035 case LPORT_ST_RSNN_NN
:
1036 case LPORT_ST_RSPN_ID
:
1037 case LPORT_ST_RFT_ID
:
1038 case LPORT_ST_RFF_ID
:
1041 case LPORT_ST_FLOGI
:
1043 fc_lport_enter_reset(lport
);
1051 * fc_lport_ns_resp() - Handle response to a name server
1052 * registration exchange
1053 * @sp: current sequence in exchange
1054 * @fp: response frame
1055 * @lp_arg: Fibre Channel host port instance
1057 * Locking Note: This function will be called without the lport lock
1058 * held, but it will lock, call an _enter_* function or fc_lport_error()
1059 * and then unlock the lport.
1061 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1064 struct fc_lport
*lport
= lp_arg
;
1065 struct fc_frame_header
*fh
;
1066 struct fc_ct_hdr
*ct
;
1068 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1070 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1073 mutex_lock(&lport
->lp_mutex
);
1075 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1076 FC_LPORT_DBG(lport
, "Received a name server response, "
1077 "but in state %s\n", fc_lport_state(lport
));
1084 fc_lport_error(lport
, fp
);
1088 fh
= fc_frame_header_get(fp
);
1089 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1091 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1092 ct
->ct_fs_type
== FC_FST_DIR
&&
1093 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1094 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1095 switch (lport
->state
) {
1096 case LPORT_ST_RNN_ID
:
1097 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1099 case LPORT_ST_RSNN_NN
:
1100 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1102 case LPORT_ST_RSPN_ID
:
1103 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1105 case LPORT_ST_RFT_ID
:
1106 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1108 case LPORT_ST_RFF_ID
:
1109 fc_lport_enter_scr(lport
);
1112 /* should have already been caught by state checks */
1116 fc_lport_error(lport
, fp
);
1120 mutex_unlock(&lport
->lp_mutex
);
1124 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1125 * @sp: current sequence in SCR exchange
1126 * @fp: response frame
1127 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1129 * Locking Note: This function will be called without the lport lock
1130 * held, but it will lock, call an _enter_* function or fc_lport_error
1131 * and then unlock the lport.
1133 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1136 struct fc_lport
*lport
= lp_arg
;
1139 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1141 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1144 mutex_lock(&lport
->lp_mutex
);
1146 if (lport
->state
!= LPORT_ST_SCR
) {
1147 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1148 "%s\n", fc_lport_state(lport
));
1155 fc_lport_error(lport
, fp
);
1159 op
= fc_frame_payload_op(fp
);
1160 if (op
== ELS_LS_ACC
)
1161 fc_lport_enter_ready(lport
);
1163 fc_lport_error(lport
, fp
);
1168 mutex_unlock(&lport
->lp_mutex
);
1172 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1173 * @lport: The local port to register for state changes
1175 * Locking Note: The lport lock is expected to be held before calling
1178 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1180 struct fc_frame
*fp
;
1182 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1183 fc_lport_state(lport
));
1185 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1187 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1189 fc_lport_error(lport
, fp
);
1193 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1194 fc_lport_scr_resp
, lport
,
1195 2 * lport
->r_a_tov
))
1196 fc_lport_error(lport
, NULL
);
1200 * fc_lport_enter_ns() - register some object with the name server
1201 * @lport: Fibre Channel local port to register
1203 * Locking Note: The lport lock is expected to be held before calling
1206 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1208 struct fc_frame
*fp
;
1210 int size
= sizeof(struct fc_ct_hdr
);
1213 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1214 fc_lport_state_names
[state
],
1215 fc_lport_state(lport
));
1217 fc_lport_state_enter(lport
, state
);
1220 case LPORT_ST_RNN_ID
:
1222 size
+= sizeof(struct fc_ns_rn_id
);
1224 case LPORT_ST_RSNN_NN
:
1225 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1226 /* if there is no symbolic name, skip to RFT_ID */
1228 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1229 cmd
= FC_NS_RSNN_NN
;
1230 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1232 case LPORT_ST_RSPN_ID
:
1233 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1234 /* if there is no symbolic name, skip to RFT_ID */
1236 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1237 cmd
= FC_NS_RSPN_ID
;
1238 size
+= sizeof(struct fc_ns_rspn
) + len
;
1240 case LPORT_ST_RFT_ID
:
1242 size
+= sizeof(struct fc_ns_rft
);
1244 case LPORT_ST_RFF_ID
:
1246 size
+= sizeof(struct fc_ns_rff_id
);
1249 fc_lport_error(lport
, NULL
);
1253 fp
= fc_frame_alloc(lport
, size
);
1255 fc_lport_error(lport
, fp
);
1259 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1261 lport
, 3 * lport
->r_a_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 fc_rport for the name server
1271 * @lport: The local port requesting a remote port 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_priv
*rdata
;
1280 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1281 fc_lport_state(lport
));
1283 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1285 mutex_lock(&lport
->disc
.disc_mutex
);
1286 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1287 mutex_unlock(&lport
->disc
.disc_mutex
);
1291 rdata
->ops
= &fc_lport_rport_ops
;
1292 lport
->tt
.rport_login(rdata
);
1296 fc_lport_error(lport
, NULL
);
1300 * fc_lport_timeout() - Handler for the retry_work timer
1301 * @work: The work struct of the local port
1303 static void fc_lport_timeout(struct work_struct
*work
)
1305 struct fc_lport
*lport
=
1306 container_of(work
, struct fc_lport
,
1309 mutex_lock(&lport
->lp_mutex
);
1311 switch (lport
->state
) {
1312 case LPORT_ST_DISABLED
:
1315 case LPORT_ST_READY
:
1318 case LPORT_ST_RESET
:
1320 case LPORT_ST_FLOGI
:
1321 fc_lport_enter_flogi(lport
);
1324 fc_lport_enter_dns(lport
);
1326 case LPORT_ST_RNN_ID
:
1327 case LPORT_ST_RSNN_NN
:
1328 case LPORT_ST_RSPN_ID
:
1329 case LPORT_ST_RFT_ID
:
1330 case LPORT_ST_RFF_ID
:
1331 fc_lport_enter_ns(lport
, lport
->state
);
1334 fc_lport_enter_scr(lport
);
1337 fc_lport_enter_logo(lport
);
1341 mutex_unlock(&lport
->lp_mutex
);
1345 * fc_lport_logo_resp() - Handle response to LOGO request
1346 * @sp: The sequence that the LOGO was on
1347 * @fp: The LOGO frame
1348 * @lp_arg: The lport port that received the LOGO request
1350 * Locking Note: This function will be called without the lport lock
1351 * held, but it will lock, call an _enter_* function or fc_lport_error()
1352 * and then unlock the lport.
1354 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1357 struct fc_lport
*lport
= lp_arg
;
1360 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1362 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1365 mutex_lock(&lport
->lp_mutex
);
1367 if (lport
->state
!= LPORT_ST_LOGO
) {
1368 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1369 "%s\n", fc_lport_state(lport
));
1376 fc_lport_error(lport
, fp
);
1380 op
= fc_frame_payload_op(fp
);
1381 if (op
== ELS_LS_ACC
)
1382 fc_lport_enter_disabled(lport
);
1384 fc_lport_error(lport
, fp
);
1389 mutex_unlock(&lport
->lp_mutex
);
1391 EXPORT_SYMBOL(fc_lport_logo_resp
);
1394 * fc_rport_enter_logo() - Logout of the fabric
1395 * @lport: The local port to be logged out
1397 * Locking Note: The lport lock is expected to be held before calling
1400 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1402 struct fc_frame
*fp
;
1403 struct fc_els_logo
*logo
;
1405 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1406 fc_lport_state(lport
));
1408 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1409 fc_vports_linkchange(lport
);
1411 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1413 fc_lport_error(lport
, fp
);
1417 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1418 fc_lport_logo_resp
, lport
,
1419 2 * lport
->r_a_tov
))
1420 fc_lport_error(lport
, NULL
);
1424 * fc_lport_flogi_resp() - Handle response to FLOGI request
1425 * @sp: The sequence that the FLOGI was on
1426 * @fp: The FLOGI response frame
1427 * @lp_arg: The lport port that received the FLOGI response
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 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 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1447 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1450 mutex_lock(&lport
->lp_mutex
);
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) {
1468 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1470 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1472 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1475 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1476 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1477 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1478 if (csp_flags
& FC_SP_FT_EDTR
)
1481 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1483 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1484 if (e_d_tov
> lport
->e_d_tov
)
1485 lport
->e_d_tov
= e_d_tov
;
1486 lport
->r_a_tov
= 2 * e_d_tov
;
1487 fc_lport_set_port_id(lport
, did
, fp
);
1488 printk(KERN_INFO
"host%d: libfc: "
1489 "Port (%6x) entered "
1490 "point-to-point mode\n",
1491 lport
->host
->host_no
, did
);
1492 fc_lport_ptp_setup(lport
, ntoh24(fh
->fh_s_id
),
1498 lport
->e_d_tov
= e_d_tov
;
1499 lport
->r_a_tov
= r_a_tov
;
1500 fc_host_fabric_name(lport
->host
) =
1501 get_unaligned_be64(&flp
->fl_wwnn
);
1502 fc_lport_set_port_id(lport
, did
, fp
);
1503 fc_lport_enter_dns(lport
);
1507 FC_LPORT_DBG(lport
, "Bad FLOGI response\n");
1513 mutex_unlock(&lport
->lp_mutex
);
1515 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1518 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1519 * @lport: Fibre Channel local port to be logged in to the fabric
1521 * Locking Note: The lport lock is expected to be held before calling
1524 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1526 struct fc_frame
*fp
;
1528 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1529 fc_lport_state(lport
));
1531 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1533 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1535 return fc_lport_error(lport
, fp
);
1537 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1538 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1539 fc_lport_flogi_resp
, lport
,
1540 lport
->vport
? 2 * lport
->r_a_tov
:
1542 fc_lport_error(lport
, NULL
);
1546 * fc_lport_config() - Configure a fc_lport
1547 * @lport: The local port to be configured
1549 int fc_lport_config(struct fc_lport
*lport
)
1551 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1552 mutex_init(&lport
->lp_mutex
);
1554 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1556 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1557 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1561 EXPORT_SYMBOL(fc_lport_config
);
1564 * fc_lport_init() - Initialize the lport layer for a local port
1565 * @lport: The local port to initialize the exchange layer for
1567 int fc_lport_init(struct fc_lport
*lport
)
1569 if (!lport
->tt
.lport_recv
)
1570 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1572 if (!lport
->tt
.lport_reset
)
1573 lport
->tt
.lport_reset
= fc_lport_reset
;
1575 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1576 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1577 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1578 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1579 memset(fc_host_supported_fc4s(lport
->host
), 0,
1580 sizeof(fc_host_supported_fc4s(lport
->host
)));
1581 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1582 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1584 /* This value is also unchanging */
1585 memset(fc_host_active_fc4s(lport
->host
), 0,
1586 sizeof(fc_host_active_fc4s(lport
->host
)));
1587 fc_host_active_fc4s(lport
->host
)[2] = 1;
1588 fc_host_active_fc4s(lport
->host
)[7] = 1;
1589 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1590 fc_host_supported_speeds(lport
->host
) = 0;
1591 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1592 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1593 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1594 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1598 EXPORT_SYMBOL(fc_lport_init
);
1601 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1602 * @sp: The sequence for the FC Passthrough response
1603 * @fp: The response frame
1604 * @info_arg: The BSG info that the response is for
1606 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1609 struct fc_bsg_info
*info
= info_arg
;
1610 struct fc_bsg_job
*job
= info
->job
;
1611 struct fc_lport
*lport
= info
->lport
;
1612 struct fc_frame_header
*fh
;
1617 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1618 -ECONNABORTED
: -ETIMEDOUT
;
1619 job
->reply_len
= sizeof(uint32_t);
1620 job
->state_flags
|= FC_RQST_STATE_DONE
;
1626 mutex_lock(&lport
->lp_mutex
);
1627 fh
= fc_frame_header_get(fp
);
1628 len
= fr_len(fp
) - sizeof(*fh
);
1629 buf
= fc_frame_payload_get(fp
, 0);
1631 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1632 /* Get the response code from the first frame payload */
1633 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1634 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1635 (unsigned short)fc_frame_payload_op(fp
);
1637 /* Save the reply status of the job */
1638 job
->reply
->reply_data
.ctels_reply
.status
=
1639 (cmd
== info
->rsp_code
) ?
1640 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1643 job
->reply
->reply_payload_rcv_len
+=
1644 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1645 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1647 if (fr_eof(fp
) == FC_EOF_T
&&
1648 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1649 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1650 if (job
->reply
->reply_payload_rcv_len
>
1651 job
->reply_payload
.payload_len
)
1652 job
->reply
->reply_payload_rcv_len
=
1653 job
->reply_payload
.payload_len
;
1654 job
->reply
->result
= 0;
1655 job
->state_flags
|= FC_RQST_STATE_DONE
;
1660 mutex_unlock(&lport
->lp_mutex
);
1664 * fc_lport_els_request() - Send ELS passthrough request
1665 * @job: The BSG Passthrough job
1666 * @lport: The local port sending the request
1667 * @did: The destination port id
1669 * Locking Note: The lport lock is expected to be held before calling
1672 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1673 struct fc_lport
*lport
,
1676 struct fc_bsg_info
*info
;
1677 struct fc_frame
*fp
;
1678 struct fc_frame_header
*fh
;
1682 fp
= fc_frame_alloc(lport
, sizeof(struct fc_frame_header
) +
1683 job
->request_payload
.payload_len
);
1687 len
= job
->request_payload
.payload_len
;
1688 pp
= fc_frame_payload_get(fp
, len
);
1690 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1691 job
->request_payload
.sg_cnt
,
1694 fh
= fc_frame_header_get(fp
);
1695 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1696 hton24(fh
->fh_d_id
, did
);
1697 hton24(fh
->fh_s_id
, fc_host_port_id(lport
->host
));
1698 fh
->fh_type
= FC_TYPE_ELS
;
1699 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1700 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1703 fh
->fh_parm_offset
= 0;
1705 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1712 info
->lport
= lport
;
1713 info
->rsp_code
= ELS_LS_ACC
;
1714 info
->nents
= job
->reply_payload
.sg_cnt
;
1715 info
->sg
= job
->reply_payload
.sg_list
;
1717 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1724 * fc_lport_ct_request() - Send CT Passthrough request
1725 * @job: The BSG Passthrough job
1726 * @lport: The local port sending the request
1727 * @did: The destination FC-ID
1728 * @tov: The timeout period to wait for the response
1730 * Locking Note: The lport lock is expected to be held before calling
1733 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1734 struct fc_lport
*lport
, u32 did
, u32 tov
)
1736 struct fc_bsg_info
*info
;
1737 struct fc_frame
*fp
;
1738 struct fc_frame_header
*fh
;
1739 struct fc_ct_req
*ct
;
1742 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1743 job
->request_payload
.payload_len
);
1747 len
= job
->request_payload
.payload_len
;
1748 ct
= fc_frame_payload_get(fp
, len
);
1750 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1751 job
->request_payload
.sg_cnt
,
1754 fh
= fc_frame_header_get(fp
);
1755 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1756 hton24(fh
->fh_d_id
, did
);
1757 hton24(fh
->fh_s_id
, fc_host_port_id(lport
->host
));
1758 fh
->fh_type
= FC_TYPE_CT
;
1759 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1760 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1763 fh
->fh_parm_offset
= 0;
1765 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1772 info
->lport
= lport
;
1773 info
->rsp_code
= FC_FS_ACC
;
1774 info
->nents
= job
->reply_payload
.sg_cnt
;
1775 info
->sg
= job
->reply_payload
.sg_list
;
1777 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1784 * fc_lport_bsg_request() - The common entry point for sending
1785 * FC Passthrough requests
1786 * @job: The BSG passthrough job
1788 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1790 struct request
*rsp
= job
->req
->next_rq
;
1791 struct Scsi_Host
*shost
= job
->shost
;
1792 struct fc_lport
*lport
= shost_priv(shost
);
1793 struct fc_rport
*rport
;
1794 struct fc_rport_priv
*rdata
;
1798 job
->reply
->reply_payload_rcv_len
= 0;
1799 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1801 mutex_lock(&lport
->lp_mutex
);
1803 switch (job
->request
->msgcode
) {
1804 case FC_BSG_RPT_ELS
:
1809 rdata
= rport
->dd_data
;
1810 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1819 rdata
= rport
->dd_data
;
1820 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1825 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1826 if (did
== FC_FID_DIR_SERV
)
1827 rdata
= lport
->dns_rdata
;
1829 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1834 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1837 case FC_BSG_HST_ELS_NOLOGIN
:
1838 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1839 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1843 mutex_unlock(&lport
->lp_mutex
);
1846 EXPORT_SYMBOL(fc_lport_bsg_request
);