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_SCR] = "SCR",
126 [LPORT_ST_READY] = "Ready",
127 [LPORT_ST_LOGO] = "LOGO",
128 [LPORT_ST_RESET] = "reset",
132 * struct fc_bsg_info - FC Passthrough managemet structure
133 * @job: The passthrough job
134 * @lport: The local port to pass through a command
135 * @rsp_code: The expected response code
136 * @sg: job->reply_payload.sg_list
137 * @nents: job->reply_payload.sg_cnt
138 * @offset: The offset into the response data
141 struct fc_bsg_job *job;
142 struct fc_lport *lport;
144 struct scatterlist *sg;
150 * fc_frame_drop() - Dummy frame handler
151 * @lport: The local port the frame was received on
152 * @fp: The received frame
154 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
161 * fc_lport_rport_callback() - Event handler for rport events
162 * @lport: The lport which is receiving the event
163 * @rdata: private remote port data
164 * @event: The event that occured
166 * Locking Note: The rport lock should not be held when calling
169 static void fc_lport_rport_callback(struct fc_lport *lport,
170 struct fc_rport_priv *rdata,
171 enum fc_rport_event event)
173 FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event,
176 mutex_lock(&lport->lp_mutex);
179 if (lport->state == LPORT_ST_DNS) {
180 lport->dns_rdata = rdata;
181 fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
183 FC_LPORT_DBG(lport, "Received an READY event "
184 "on port (%6x) for the directory "
185 "server, but the lport is not "
186 "in the DNS state, it's in the "
187 "%d state", rdata->ids.port_id,
189 lport->tt.rport_logoff(rdata);
193 case RPORT_EV_FAILED:
195 lport->dns_rdata = NULL;
200 mutex_unlock(&lport->lp_mutex);
204 * fc_lport_state() - Return a string which represents the lport's state
205 * @lport: The lport whose state is to converted to a string
207 static const char *fc_lport_state(struct fc_lport *lport)
211 cp = fc_lport_state_names[lport->state];
218 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
219 * @lport: The lport to attach the ptp rport to
220 * @remote_fid: The FID of the ptp rport
221 * @remote_wwpn: The WWPN of the ptp rport
222 * @remote_wwnn: The WWNN of the ptp rport
224 static void fc_lport_ptp_setup(struct fc_lport *lport,
225 u32 remote_fid, u64 remote_wwpn,
228 mutex_lock(&lport->disc.disc_mutex);
229 if (lport->ptp_rdata)
230 lport->tt.rport_logoff(lport->ptp_rdata);
231 lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
232 lport->ptp_rdata->ids.port_name = remote_wwpn;
233 lport->ptp_rdata->ids.node_name = remote_wwnn;
234 mutex_unlock(&lport->disc.disc_mutex);
236 lport->tt.rport_login(lport->ptp_rdata);
238 fc_lport_enter_ready(lport);
242 * fc_get_host_port_type() - Return the port type of the given Scsi_Host
243 * @shost: The SCSI host whose port type is to be determined
245 void fc_get_host_port_type(struct Scsi_Host *shost)
247 /* TODO - currently just NPORT */
248 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
250 EXPORT_SYMBOL(fc_get_host_port_type);
253 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
254 * @shost: The SCSI host whose port state is to be determined
256 void fc_get_host_port_state(struct Scsi_Host *shost)
258 struct fc_lport *lport = shost_priv(shost);
260 mutex_lock(&lport->lp_mutex);
262 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
264 switch (lport->state) {
266 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
269 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
271 mutex_unlock(&lport->lp_mutex);
273 EXPORT_SYMBOL(fc_get_host_port_state);
276 * fc_get_host_speed() - Return the speed of the given Scsi_Host
277 * @shost: The SCSI host whose port speed is to be determined
279 void fc_get_host_speed(struct Scsi_Host *shost)
281 struct fc_lport *lport = shost_priv(shost);
283 fc_host_speed(shost) = lport->link_speed;
285 EXPORT_SYMBOL(fc_get_host_speed);
288 * fc_get_host_stats() - Return the Scsi_Host's statistics
289 * @shost: The SCSI host whose statistics are to be returned
291 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
293 struct fc_host_statistics *fcoe_stats;
294 struct fc_lport *lport = shost_priv(shost);
295 struct timespec v0, v1;
298 fcoe_stats = &lport->host_stats;
299 memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
301 jiffies_to_timespec(jiffies, &v0);
302 jiffies_to_timespec(lport->boot_time, &v1);
303 fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
305 for_each_possible_cpu(cpu) {
306 struct fcoe_dev_stats *stats;
308 stats = per_cpu_ptr(lport->dev_stats, cpu);
310 fcoe_stats->tx_frames += stats->TxFrames;
311 fcoe_stats->tx_words += stats->TxWords;
312 fcoe_stats->rx_frames += stats->RxFrames;
313 fcoe_stats->rx_words += stats->RxWords;
314 fcoe_stats->error_frames += stats->ErrorFrames;
315 fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
316 fcoe_stats->fcp_input_requests += stats->InputRequests;
317 fcoe_stats->fcp_output_requests += stats->OutputRequests;
318 fcoe_stats->fcp_control_requests += stats->ControlRequests;
319 fcoe_stats->fcp_input_megabytes += stats->InputMegabytes;
320 fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes;
321 fcoe_stats->link_failure_count += stats->LinkFailureCount;
323 fcoe_stats->lip_count = -1;
324 fcoe_stats->nos_count = -1;
325 fcoe_stats->loss_of_sync_count = -1;
326 fcoe_stats->loss_of_signal_count = -1;
327 fcoe_stats->prim_seq_protocol_err_count = -1;
328 fcoe_stats->dumped_frames = -1;
331 EXPORT_SYMBOL(fc_get_host_stats);
334 * fc_lport_flogi_fill() - Fill in FLOGI command for request
335 * @lport: The local port the FLOGI is for
336 * @flogi: The FLOGI command
339 static void fc_lport_flogi_fill(struct fc_lport *lport,
340 struct fc_els_flogi *flogi,
343 struct fc_els_csp *sp;
344 struct fc_els_cssp *cp;
346 memset(flogi, 0, sizeof(*flogi));
347 flogi->fl_cmd = (u8) op;
348 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
349 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
351 sp->sp_hi_ver = 0x20;
352 sp->sp_lo_ver = 0x20;
353 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
354 sp->sp_bb_data = htons((u16) lport->mfs);
355 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
356 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
357 if (op != ELS_FLOGI) {
358 sp->sp_features = htons(FC_SP_FT_CIRO);
359 sp->sp_tot_seq = htons(255); /* seq. we accept */
360 sp->sp_rel_off = htons(0x1f);
361 sp->sp_e_d_tov = htonl(lport->e_d_tov);
363 cp->cp_rdfs = htons((u16) lport->mfs);
364 cp->cp_con_seq = htons(255);
370 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
371 * @lport: The local port to add a new FC-4 type to
372 * @type: The new FC-4 type
374 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
378 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
379 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
383 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
384 * @sp: The sequence in the RLIR exchange
385 * @fp: The RLIR request frame
386 * @lport: Fibre Channel local port recieving the RLIR
388 * Locking Note: The lport lock is expected to be held before calling
391 static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
392 struct fc_lport *lport)
394 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
395 fc_lport_state(lport));
397 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
402 * fc_lport_recv_echo_req() - Handle received ECHO request
403 * @sp: The sequence in the ECHO exchange
404 * @fp: ECHO request frame
405 * @lport: The local port recieving the ECHO
407 * Locking Note: The lport lock is expected to be held before calling
410 static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
411 struct fc_lport *lport)
414 struct fc_exch *ep = fc_seq_exch(sp);
420 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
421 fc_lport_state(lport));
423 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
424 pp = fc_frame_payload_get(in_fp, len);
426 if (len < sizeof(__be32))
427 len = sizeof(__be32);
429 fp = fc_frame_alloc(lport, len);
431 dp = fc_frame_payload_get(fp, len);
433 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
434 sp = lport->tt.seq_start_next(sp);
435 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
436 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
437 FC_TYPE_ELS, f_ctl, 0);
438 lport->tt.seq_send(lport, sp, fp);
440 fc_frame_free(in_fp);
444 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
445 * @sp: The sequence in the RNID exchange
446 * @fp: The RNID request frame
447 * @lport: The local port recieving the RNID
449 * Locking Note: The lport lock is expected to be held before calling
452 static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
453 struct fc_lport *lport)
456 struct fc_exch *ep = fc_seq_exch(sp);
457 struct fc_els_rnid *req;
459 struct fc_els_rnid_resp rnid;
460 struct fc_els_rnid_cid cid;
461 struct fc_els_rnid_gen gen;
463 struct fc_seq_els_data rjt_data;
468 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
469 fc_lport_state(lport));
471 req = fc_frame_payload_get(in_fp, sizeof(*req));
474 rjt_data.reason = ELS_RJT_LOGIC;
475 rjt_data.explan = ELS_EXPL_NONE;
476 lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
480 if (fmt != ELS_RNIDF_GEN ||
481 ntohl(lport->rnid_gen.rnid_atype) == 0) {
482 fmt = ELS_RNIDF_NONE; /* nothing to provide */
483 len -= sizeof(rp->gen);
485 fp = fc_frame_alloc(lport, len);
487 rp = fc_frame_payload_get(fp, len);
489 rp->rnid.rnid_cmd = ELS_LS_ACC;
490 rp->rnid.rnid_fmt = fmt;
491 rp->rnid.rnid_cid_len = sizeof(rp->cid);
492 rp->cid.rnid_wwpn = htonll(lport->wwpn);
493 rp->cid.rnid_wwnn = htonll(lport->wwnn);
494 if (fmt == ELS_RNIDF_GEN) {
495 rp->rnid.rnid_sid_len = sizeof(rp->gen);
496 memcpy(&rp->gen, &lport->rnid_gen,
499 sp = lport->tt.seq_start_next(sp);
500 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
501 f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
502 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
503 FC_TYPE_ELS, f_ctl, 0);
504 lport->tt.seq_send(lport, sp, fp);
507 fc_frame_free(in_fp);
511 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
512 * @sp: The sequence in the LOGO exchange
513 * @fp: The LOGO request frame
514 * @lport: The local port recieving the LOGO
516 * Locking Note: The lport lock is exected to be held before calling
519 static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
520 struct fc_lport *lport)
522 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
523 fc_lport_enter_reset(lport);
528 * fc_fabric_login() - Start the lport state machine
529 * @lport: The local port that should log into the fabric
531 * Locking Note: This function should not be called
532 * with the lport lock held.
534 int fc_fabric_login(struct fc_lport *lport)
538 mutex_lock(&lport->lp_mutex);
539 if (lport->state == LPORT_ST_DISABLED) {
540 fc_lport_enter_reset(lport);
543 mutex_unlock(&lport->lp_mutex);
547 EXPORT_SYMBOL(fc_fabric_login);
550 * __fc_linkup() - Handler for transport linkup events
551 * @lport: The lport whose link is up
553 * Locking: must be called with the lp_mutex held
555 void __fc_linkup(struct fc_lport *lport)
557 if (!lport->link_up) {
560 if (lport->state == LPORT_ST_RESET)
561 fc_lport_enter_flogi(lport);
566 * fc_linkup() - Handler for transport linkup events
567 * @lport: The local port whose link is up
569 void fc_linkup(struct fc_lport *lport)
571 printk(KERN_INFO "host%d: libfc: Link up on port (%6x)\n",
572 lport->host->host_no, fc_host_port_id(lport->host));
574 mutex_lock(&lport->lp_mutex);
576 mutex_unlock(&lport->lp_mutex);
578 EXPORT_SYMBOL(fc_linkup);
581 * __fc_linkdown() - Handler for transport linkdown events
582 * @lport: The lport whose link is down
584 * Locking: must be called with the lp_mutex held
586 void __fc_linkdown(struct fc_lport *lport)
588 if (lport->link_up) {
590 fc_lport_enter_reset(lport);
591 lport->tt.fcp_cleanup(lport);
596 * fc_linkdown() - Handler for transport linkdown events
597 * @lport: The local port whose link is down
599 void fc_linkdown(struct fc_lport *lport)
601 printk(KERN_INFO "host%d: libfc: Link down on port (%6x)\n",
602 lport->host->host_no, fc_host_port_id(lport->host));
604 mutex_lock(&lport->lp_mutex);
605 __fc_linkdown(lport);
606 mutex_unlock(&lport->lp_mutex);
608 EXPORT_SYMBOL(fc_linkdown);
611 * fc_fabric_logoff() - Logout of the fabric
612 * @lport: The local port to logoff the fabric
615 * 0 for success, -1 for failure
617 int fc_fabric_logoff(struct fc_lport *lport)
619 lport->tt.disc_stop_final(lport);
620 mutex_lock(&lport->lp_mutex);
621 if (lport->dns_rdata)
622 lport->tt.rport_logoff(lport->dns_rdata);
623 mutex_unlock(&lport->lp_mutex);
624 lport->tt.rport_flush_queue();
625 mutex_lock(&lport->lp_mutex);
626 fc_lport_enter_logo(lport);
627 mutex_unlock(&lport->lp_mutex);
628 cancel_delayed_work_sync(&lport->retry_work);
631 EXPORT_SYMBOL(fc_fabric_logoff);
634 * fc_lport_destroy() - Unregister a fc_lport
635 * @lport: The local port to unregister
638 * exit routine for fc_lport instance
639 * clean-up all the allocated memory
640 * and free up other system resources.
643 int fc_lport_destroy(struct fc_lport *lport)
645 mutex_lock(&lport->lp_mutex);
646 lport->state = LPORT_ST_DISABLED;
648 lport->tt.frame_send = fc_frame_drop;
649 mutex_unlock(&lport->lp_mutex);
651 lport->tt.fcp_abort_io(lport);
652 lport->tt.disc_stop_final(lport);
653 lport->tt.exch_mgr_reset(lport, 0, 0);
656 EXPORT_SYMBOL(fc_lport_destroy);
659 * fc_set_mfs() - Set the maximum frame size for a local port
660 * @lport: The local port to set the MFS for
663 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
665 unsigned int old_mfs;
668 mutex_lock(&lport->lp_mutex);
670 old_mfs = lport->mfs;
672 if (mfs >= FC_MIN_MAX_FRAME) {
674 if (mfs > FC_MAX_FRAME)
676 mfs -= sizeof(struct fc_frame_header);
681 if (!rc && mfs < old_mfs)
682 fc_lport_enter_reset(lport);
684 mutex_unlock(&lport->lp_mutex);
688 EXPORT_SYMBOL(fc_set_mfs);
691 * fc_lport_disc_callback() - Callback for discovery events
692 * @lport: The local port receiving the event
693 * @event: The discovery event
695 void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
698 case DISC_EV_SUCCESS:
699 FC_LPORT_DBG(lport, "Discovery succeeded\n");
702 printk(KERN_ERR "host%d: libfc: "
703 "Discovery failed for port (%6x)\n",
704 lport->host->host_no, fc_host_port_id(lport->host));
705 mutex_lock(&lport->lp_mutex);
706 fc_lport_enter_reset(lport);
707 mutex_unlock(&lport->lp_mutex);
716 * fc_rport_enter_ready() - Enter the ready state and start discovery
717 * @lport: The local port that is ready
719 * Locking Note: The lport lock is expected to be held before calling
722 static void fc_lport_enter_ready(struct fc_lport *lport)
724 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
725 fc_lport_state(lport));
727 fc_lport_state_enter(lport, LPORT_ST_READY);
729 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
730 fc_vports_linkchange(lport);
732 if (!lport->ptp_rdata)
733 lport->tt.disc_start(fc_lport_disc_callback, lport);
737 * fc_lport_set_port_id() - set the local port Port ID
738 * @lport: The local port which will have its Port ID set.
739 * @port_id: The new port ID.
740 * @fp: The frame containing the incoming request, or NULL.
742 * Locking Note: The lport lock is expected to be held before calling
745 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
749 printk(KERN_INFO "host%d: Assigned Port ID %6x\n",
750 lport->host->host_no, port_id);
752 fc_host_port_id(lport->host) = port_id;
753 if (lport->tt.lport_set_port_id)
754 lport->tt.lport_set_port_id(lport, port_id, fp);
758 * fc_lport_recv_flogi_req() - Receive a FLOGI request
759 * @sp_in: The sequence the FLOGI is on
760 * @rx_fp: The FLOGI frame
761 * @lport: The local port that recieved the request
763 * A received FLOGI request indicates a point-to-point connection.
764 * Accept it with the common service parameters indicating our N port.
765 * Set up to do a PLOGI if we have the higher-number WWPN.
767 * Locking Note: The lport lock is expected to be held before calling
770 static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
771 struct fc_frame *rx_fp,
772 struct fc_lport *lport)
775 struct fc_frame_header *fh;
778 struct fc_els_flogi *flp;
779 struct fc_els_flogi *new_flp;
785 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
786 fc_lport_state(lport));
788 fh = fc_frame_header_get(rx_fp);
789 remote_fid = ntoh24(fh->fh_s_id);
790 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
793 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
794 if (remote_wwpn == lport->wwpn) {
795 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
796 "with same WWPN %llx\n",
797 lport->host->host_no, remote_wwpn);
800 FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn);
803 * XXX what is the right thing to do for FIDs?
804 * The originator might expect our S_ID to be 0xfffffe.
805 * But if so, both of us could end up with the same FID.
807 local_fid = FC_LOCAL_PTP_FID_LO;
808 if (remote_wwpn < lport->wwpn) {
809 local_fid = FC_LOCAL_PTP_FID_HI;
810 if (!remote_fid || remote_fid == local_fid)
811 remote_fid = FC_LOCAL_PTP_FID_LO;
812 } else if (!remote_fid) {
813 remote_fid = FC_LOCAL_PTP_FID_HI;
816 fc_lport_set_port_id(lport, local_fid, rx_fp);
818 fp = fc_frame_alloc(lport, sizeof(*flp));
820 sp = lport->tt.seq_start_next(fr_seq(rx_fp));
821 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
822 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
823 new_flp->fl_cmd = (u8) ELS_LS_ACC;
826 * Send the response. If this fails, the originator should
827 * repeat the sequence.
829 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
830 ep = fc_seq_exch(sp);
831 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
832 FC_TYPE_ELS, f_ctl, 0);
833 lport->tt.seq_send(lport, sp, fp);
836 fc_lport_error(lport, fp);
838 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
839 get_unaligned_be64(&flp->fl_wwnn));
843 fc_frame_free(rx_fp);
847 * fc_lport_recv_req() - The generic lport request handler
848 * @lport: The local port that received the request
849 * @sp: The sequence the request is on
850 * @fp: The request frame
852 * This function will see if the lport handles the request or
853 * if an rport should handle the request.
855 * Locking Note: This function should not be called with the lport
856 * lock held becuase it will grab the lock.
858 static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
861 struct fc_frame_header *fh = fc_frame_header_get(fp);
862 void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
864 mutex_lock(&lport->lp_mutex);
867 * Handle special ELS cases like FLOGI, LOGO, and
868 * RSCN here. These don't require a session.
869 * Even if we had a session, it might not be ready.
873 else if (fh->fh_type == FC_TYPE_ELS &&
874 fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
878 recv = lport->tt.rport_recv_req;
879 switch (fc_frame_payload_op(fp)) {
881 recv = fc_lport_recv_flogi_req;
884 fh = fc_frame_header_get(fp);
885 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
886 recv = fc_lport_recv_logo_req;
889 recv = lport->tt.disc_recv_req;
892 recv = fc_lport_recv_echo_req;
895 recv = fc_lport_recv_rlir_req;
898 recv = fc_lport_recv_rnid_req;
904 FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
908 mutex_unlock(&lport->lp_mutex);
911 * The common exch_done for all request may not be good
912 * if any request requires longer hold on exhange. XXX
914 lport->tt.exch_done(sp);
918 * fc_lport_reset() - Reset a local port
919 * @lport: The local port which should be reset
921 * Locking Note: This functions should not be called with the
924 int fc_lport_reset(struct fc_lport *lport)
926 cancel_delayed_work_sync(&lport->retry_work);
927 mutex_lock(&lport->lp_mutex);
928 fc_lport_enter_reset(lport);
929 mutex_unlock(&lport->lp_mutex);
932 EXPORT_SYMBOL(fc_lport_reset);
935 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
936 * @lport: The local port to be reset
938 * Locking Note: The lport lock is expected to be held before calling
941 static void fc_lport_reset_locked(struct fc_lport *lport)
943 if (lport->dns_rdata)
944 lport->tt.rport_logoff(lport->dns_rdata);
946 lport->ptp_rdata = NULL;
948 lport->tt.disc_stop(lport);
950 lport->tt.exch_mgr_reset(lport, 0, 0);
951 fc_host_fabric_name(lport->host) = 0;
953 if (fc_host_port_id(lport->host))
954 fc_lport_set_port_id(lport, 0, NULL);
958 * fc_lport_enter_reset() - Reset the local port
959 * @lport: The local port to be reset
961 * Locking Note: The lport lock is expected to be held before calling
964 static void fc_lport_enter_reset(struct fc_lport *lport)
966 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
967 fc_lport_state(lport));
971 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
973 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
975 fc_lport_state_enter(lport, LPORT_ST_RESET);
976 fc_vports_linkchange(lport);
977 fc_lport_reset_locked(lport);
979 fc_lport_enter_flogi(lport);
983 * fc_lport_enter_disabled() - Disable the local port
984 * @lport: The local port to be reset
986 * Locking Note: The lport lock is expected to be held before calling
989 static void fc_lport_enter_disabled(struct fc_lport *lport)
991 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
992 fc_lport_state(lport));
994 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
995 fc_vports_linkchange(lport);
996 fc_lport_reset_locked(lport);
1000 * fc_lport_error() - Handler for any errors
1001 * @lport: The local port that the error was on
1002 * @fp: The error code encoded in a frame pointer
1004 * If the error was caused by a resource allocation failure
1005 * then wait for half a second and retry, otherwise retry
1006 * after the e_d_tov time.
1008 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1010 unsigned long delay = 0;
1011 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1012 PTR_ERR(fp), fc_lport_state(lport),
1013 lport->retry_count);
1015 if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
1017 * Memory allocation failure, or the exchange timed out.
1020 if (lport->retry_count < lport->max_retry_count) {
1021 lport->retry_count++;
1023 delay = msecs_to_jiffies(500);
1025 delay = msecs_to_jiffies(lport->e_d_tov);
1027 schedule_delayed_work(&lport->retry_work, delay);
1029 switch (lport->state) {
1030 case LPORT_ST_DISABLED:
1031 case LPORT_ST_READY:
1032 case LPORT_ST_RESET:
1033 case LPORT_ST_RNN_ID:
1034 case LPORT_ST_RSNN_NN:
1035 case LPORT_ST_RSPN_ID:
1036 case LPORT_ST_RFT_ID:
1039 case LPORT_ST_FLOGI:
1041 fc_lport_enter_reset(lport);
1049 * fc_lport_ns_resp() - Handle response to a name server
1050 * registration exchange
1051 * @sp: current sequence in exchange
1052 * @fp: response frame
1053 * @lp_arg: Fibre Channel host port instance
1055 * Locking Note: This function will be called without the lport lock
1056 * held, but it will lock, call an _enter_* function or fc_lport_error()
1057 * and then unlock the lport.
1059 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1062 struct fc_lport *lport = lp_arg;
1063 struct fc_frame_header *fh;
1064 struct fc_ct_hdr *ct;
1066 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1068 if (fp == ERR_PTR(-FC_EX_CLOSED))
1071 mutex_lock(&lport->lp_mutex);
1073 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFT_ID) {
1074 FC_LPORT_DBG(lport, "Received a name server response, "
1075 "but in state %s\n", fc_lport_state(lport));
1082 fc_lport_error(lport, fp);
1086 fh = fc_frame_header_get(fp);
1087 ct = fc_frame_payload_get(fp, sizeof(*ct));
1089 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1090 ct->ct_fs_type == FC_FST_DIR &&
1091 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1092 ntohs(ct->ct_cmd) == FC_FS_ACC)
1093 switch (lport->state) {
1094 case LPORT_ST_RNN_ID:
1095 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1097 case LPORT_ST_RSNN_NN:
1098 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1100 case LPORT_ST_RSPN_ID:
1101 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1103 case LPORT_ST_RFT_ID:
1104 fc_lport_enter_scr(lport);
1107 /* should have already been caught by state checks */
1111 fc_lport_error(lport, fp);
1115 mutex_unlock(&lport->lp_mutex);
1119 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1120 * @sp: current sequence in SCR exchange
1121 * @fp: response frame
1122 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1124 * Locking Note: This function will be called without the lport lock
1125 * held, but it will lock, call an _enter_* function or fc_lport_error
1126 * and then unlock the lport.
1128 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1131 struct fc_lport *lport = lp_arg;
1134 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1136 if (fp == ERR_PTR(-FC_EX_CLOSED))
1139 mutex_lock(&lport->lp_mutex);
1141 if (lport->state != LPORT_ST_SCR) {
1142 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1143 "%s\n", fc_lport_state(lport));
1150 fc_lport_error(lport, fp);
1154 op = fc_frame_payload_op(fp);
1155 if (op == ELS_LS_ACC)
1156 fc_lport_enter_ready(lport);
1158 fc_lport_error(lport, fp);
1163 mutex_unlock(&lport->lp_mutex);
1167 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1168 * @lport: The local port to register for state changes
1170 * Locking Note: The lport lock is expected to be held before calling
1173 static void fc_lport_enter_scr(struct fc_lport *lport)
1175 struct fc_frame *fp;
1177 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1178 fc_lport_state(lport));
1180 fc_lport_state_enter(lport, LPORT_ST_SCR);
1182 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1184 fc_lport_error(lport, fp);
1188 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1189 fc_lport_scr_resp, lport, lport->e_d_tov))
1190 fc_lport_error(lport, NULL);
1194 * fc_lport_enter_ns() - register some object with the name server
1195 * @lport: Fibre Channel local port to register
1197 * Locking Note: The lport lock is expected to be held before calling
1200 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1202 struct fc_frame *fp;
1204 int size = sizeof(struct fc_ct_hdr);
1207 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1208 fc_lport_state_names[state],
1209 fc_lport_state(lport));
1211 fc_lport_state_enter(lport, state);
1214 case LPORT_ST_RNN_ID:
1216 size += sizeof(struct fc_ns_rn_id);
1218 case LPORT_ST_RSNN_NN:
1219 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1220 /* if there is no symbolic name, skip to RFT_ID */
1222 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1223 cmd = FC_NS_RSNN_NN;
1224 size += sizeof(struct fc_ns_rsnn) + len;
1226 case LPORT_ST_RSPN_ID:
1227 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1228 /* if there is no symbolic name, skip to RFT_ID */
1230 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1231 cmd = FC_NS_RSPN_ID;
1232 size += sizeof(struct fc_ns_rspn) + len;
1234 case LPORT_ST_RFT_ID:
1236 size += sizeof(struct fc_ns_rft);
1239 fc_lport_error(lport, NULL);
1243 fp = fc_frame_alloc(lport, size);
1245 fc_lport_error(lport, fp);
1249 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1251 lport, lport->e_d_tov))
1252 fc_lport_error(lport, fp);
1255 static struct fc_rport_operations fc_lport_rport_ops = {
1256 .event_callback = fc_lport_rport_callback,
1260 * fc_rport_enter_dns() - Create a fc_rport for the name server
1261 * @lport: The local port requesting a remote port for the name server
1263 * Locking Note: The lport lock is expected to be held before calling
1266 static void fc_lport_enter_dns(struct fc_lport *lport)
1268 struct fc_rport_priv *rdata;
1270 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1271 fc_lport_state(lport));
1273 fc_lport_state_enter(lport, LPORT_ST_DNS);
1275 mutex_lock(&lport->disc.disc_mutex);
1276 rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1277 mutex_unlock(&lport->disc.disc_mutex);
1281 rdata->ops = &fc_lport_rport_ops;
1282 lport->tt.rport_login(rdata);
1286 fc_lport_error(lport, NULL);
1290 * fc_lport_timeout() - Handler for the retry_work timer
1291 * @work: The work struct of the local port
1293 static void fc_lport_timeout(struct work_struct *work)
1295 struct fc_lport *lport =
1296 container_of(work, struct fc_lport,
1299 mutex_lock(&lport->lp_mutex);
1301 switch (lport->state) {
1302 case LPORT_ST_DISABLED:
1305 case LPORT_ST_READY:
1308 case LPORT_ST_RESET:
1310 case LPORT_ST_FLOGI:
1311 fc_lport_enter_flogi(lport);
1314 fc_lport_enter_dns(lport);
1316 case LPORT_ST_RNN_ID:
1317 case LPORT_ST_RSNN_NN:
1318 case LPORT_ST_RSPN_ID:
1319 case LPORT_ST_RFT_ID:
1320 fc_lport_enter_ns(lport, lport->state);
1323 fc_lport_enter_scr(lport);
1326 fc_lport_enter_logo(lport);
1330 mutex_unlock(&lport->lp_mutex);
1334 * fc_lport_logo_resp() - Handle response to LOGO request
1335 * @sp: The sequence that the LOGO was on
1336 * @fp: The LOGO frame
1337 * @lp_arg: The lport port that received the LOGO request
1339 * Locking Note: This function will be called without the lport lock
1340 * held, but it will lock, call an _enter_* function or fc_lport_error()
1341 * and then unlock the lport.
1343 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1346 struct fc_lport *lport = lp_arg;
1349 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1351 if (fp == ERR_PTR(-FC_EX_CLOSED))
1354 mutex_lock(&lport->lp_mutex);
1356 if (lport->state != LPORT_ST_LOGO) {
1357 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1358 "%s\n", fc_lport_state(lport));
1365 fc_lport_error(lport, fp);
1369 op = fc_frame_payload_op(fp);
1370 if (op == ELS_LS_ACC)
1371 fc_lport_enter_disabled(lport);
1373 fc_lport_error(lport, fp);
1378 mutex_unlock(&lport->lp_mutex);
1380 EXPORT_SYMBOL(fc_lport_logo_resp);
1383 * fc_rport_enter_logo() - Logout of the fabric
1384 * @lport: The local port to be logged out
1386 * Locking Note: The lport lock is expected to be held before calling
1389 static void fc_lport_enter_logo(struct fc_lport *lport)
1391 struct fc_frame *fp;
1392 struct fc_els_logo *logo;
1394 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1395 fc_lport_state(lport));
1397 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1398 fc_vports_linkchange(lport);
1400 fp = fc_frame_alloc(lport, sizeof(*logo));
1402 fc_lport_error(lport, fp);
1406 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1407 fc_lport_logo_resp, lport, lport->e_d_tov))
1408 fc_lport_error(lport, NULL);
1412 * fc_lport_flogi_resp() - Handle response to FLOGI request
1413 * @sp: The sequence that the FLOGI was on
1414 * @fp: The FLOGI response frame
1415 * @lp_arg: The lport port that received the FLOGI response
1417 * Locking Note: This function will be called without the lport lock
1418 * held, but it will lock, call an _enter_* function or fc_lport_error()
1419 * and then unlock the lport.
1421 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1424 struct fc_lport *lport = lp_arg;
1425 struct fc_frame_header *fh;
1426 struct fc_els_flogi *flp;
1429 unsigned int r_a_tov;
1430 unsigned int e_d_tov;
1433 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1435 if (fp == ERR_PTR(-FC_EX_CLOSED))
1438 mutex_lock(&lport->lp_mutex);
1440 if (lport->state != LPORT_ST_FLOGI) {
1441 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1442 "%s\n", fc_lport_state(lport));
1449 fc_lport_error(lport, fp);
1453 fh = fc_frame_header_get(fp);
1454 did = ntoh24(fh->fh_d_id);
1455 if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
1456 flp = fc_frame_payload_get(fp, sizeof(*flp));
1458 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1460 if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
1463 csp_flags = ntohs(flp->fl_csp.sp_features);
1464 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1465 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1466 if (csp_flags & FC_SP_FT_EDTR)
1469 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1471 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1472 if (e_d_tov > lport->e_d_tov)
1473 lport->e_d_tov = e_d_tov;
1474 lport->r_a_tov = 2 * e_d_tov;
1475 fc_lport_set_port_id(lport, did, fp);
1476 printk(KERN_INFO "host%d: libfc: "
1477 "Port (%6x) entered "
1478 "point-to-point mode\n",
1479 lport->host->host_no, did);
1480 fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id),
1486 lport->e_d_tov = e_d_tov;
1487 lport->r_a_tov = r_a_tov;
1488 fc_host_fabric_name(lport->host) =
1489 get_unaligned_be64(&flp->fl_wwnn);
1490 fc_lport_set_port_id(lport, did, fp);
1491 fc_lport_enter_dns(lport);
1495 FC_LPORT_DBG(lport, "Bad FLOGI response\n");
1501 mutex_unlock(&lport->lp_mutex);
1503 EXPORT_SYMBOL(fc_lport_flogi_resp);
1506 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1507 * @lport: Fibre Channel local port to be logged in to the fabric
1509 * Locking Note: The lport lock is expected to be held before calling
1512 void fc_lport_enter_flogi(struct fc_lport *lport)
1514 struct fc_frame *fp;
1516 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1517 fc_lport_state(lport));
1519 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1521 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1523 return fc_lport_error(lport, fp);
1525 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1526 lport->vport ? ELS_FDISC : ELS_FLOGI,
1527 fc_lport_flogi_resp, lport, lport->e_d_tov))
1528 fc_lport_error(lport, NULL);
1532 * fc_lport_config() - Configure a fc_lport
1533 * @lport: The local port to be configured
1535 int fc_lport_config(struct fc_lport *lport)
1537 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1538 mutex_init(&lport->lp_mutex);
1540 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1542 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1543 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1547 EXPORT_SYMBOL(fc_lport_config);
1550 * fc_lport_init() - Initialize the lport layer for a local port
1551 * @lport: The local port to initialize the exchange layer for
1553 int fc_lport_init(struct fc_lport *lport)
1555 if (!lport->tt.lport_recv)
1556 lport->tt.lport_recv = fc_lport_recv_req;
1558 if (!lport->tt.lport_reset)
1559 lport->tt.lport_reset = fc_lport_reset;
1561 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1562 fc_host_node_name(lport->host) = lport->wwnn;
1563 fc_host_port_name(lport->host) = lport->wwpn;
1564 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1565 memset(fc_host_supported_fc4s(lport->host), 0,
1566 sizeof(fc_host_supported_fc4s(lport->host)));
1567 fc_host_supported_fc4s(lport->host)[2] = 1;
1568 fc_host_supported_fc4s(lport->host)[7] = 1;
1570 /* This value is also unchanging */
1571 memset(fc_host_active_fc4s(lport->host), 0,
1572 sizeof(fc_host_active_fc4s(lport->host)));
1573 fc_host_active_fc4s(lport->host)[2] = 1;
1574 fc_host_active_fc4s(lport->host)[7] = 1;
1575 fc_host_maxframe_size(lport->host) = lport->mfs;
1576 fc_host_supported_speeds(lport->host) = 0;
1577 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1578 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1579 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1580 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1584 EXPORT_SYMBOL(fc_lport_init);
1587 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1588 * @sp: The sequence for the FC Passthrough response
1589 * @fp: The response frame
1590 * @info_arg: The BSG info that the response is for
1592 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1595 struct fc_bsg_info *info = info_arg;
1596 struct fc_bsg_job *job = info->job;
1597 struct fc_lport *lport = info->lport;
1598 struct fc_frame_header *fh;
1603 job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1604 -ECONNABORTED : -ETIMEDOUT;
1605 job->reply_len = sizeof(uint32_t);
1606 job->state_flags |= FC_RQST_STATE_DONE;
1612 mutex_lock(&lport->lp_mutex);
1613 fh = fc_frame_header_get(fp);
1614 len = fr_len(fp) - sizeof(*fh);
1615 buf = fc_frame_payload_get(fp, 0);
1617 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1618 /* Get the response code from the first frame payload */
1619 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1620 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1621 (unsigned short)fc_frame_payload_op(fp);
1623 /* Save the reply status of the job */
1624 job->reply->reply_data.ctels_reply.status =
1625 (cmd == info->rsp_code) ?
1626 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1629 job->reply->reply_payload_rcv_len +=
1630 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1631 &info->offset, KM_BIO_SRC_IRQ, NULL);
1633 if (fr_eof(fp) == FC_EOF_T &&
1634 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1635 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1636 if (job->reply->reply_payload_rcv_len >
1637 job->reply_payload.payload_len)
1638 job->reply->reply_payload_rcv_len =
1639 job->reply_payload.payload_len;
1640 job->reply->result = 0;
1641 job->state_flags |= FC_RQST_STATE_DONE;
1646 mutex_unlock(&lport->lp_mutex);
1650 * fc_lport_els_request() - Send ELS passthrough request
1651 * @job: The BSG Passthrough job
1652 * @lport: The local port sending the request
1653 * @did: The destination port id
1655 * Locking Note: The lport lock is expected to be held before calling
1658 static int fc_lport_els_request(struct fc_bsg_job *job,
1659 struct fc_lport *lport,
1662 struct fc_bsg_info *info;
1663 struct fc_frame *fp;
1664 struct fc_frame_header *fh;
1668 fp = fc_frame_alloc(lport, sizeof(struct fc_frame_header) +
1669 job->request_payload.payload_len);
1673 len = job->request_payload.payload_len;
1674 pp = fc_frame_payload_get(fp, len);
1676 sg_copy_to_buffer(job->request_payload.sg_list,
1677 job->request_payload.sg_cnt,
1680 fh = fc_frame_header_get(fp);
1681 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1682 hton24(fh->fh_d_id, did);
1683 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1684 fh->fh_type = FC_TYPE_ELS;
1685 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1686 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1689 fh->fh_parm_offset = 0;
1691 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1698 info->lport = lport;
1699 info->rsp_code = ELS_LS_ACC;
1700 info->nents = job->reply_payload.sg_cnt;
1701 info->sg = job->reply_payload.sg_list;
1703 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1710 * fc_lport_ct_request() - Send CT Passthrough request
1711 * @job: The BSG Passthrough job
1712 * @lport: The local port sending the request
1713 * @did: The destination FC-ID
1714 * @tov: The timeout period to wait for the response
1716 * Locking Note: The lport lock is expected to be held before calling
1719 static int fc_lport_ct_request(struct fc_bsg_job *job,
1720 struct fc_lport *lport, u32 did, u32 tov)
1722 struct fc_bsg_info *info;
1723 struct fc_frame *fp;
1724 struct fc_frame_header *fh;
1725 struct fc_ct_req *ct;
1728 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
1729 job->request_payload.payload_len);
1733 len = job->request_payload.payload_len;
1734 ct = fc_frame_payload_get(fp, len);
1736 sg_copy_to_buffer(job->request_payload.sg_list,
1737 job->request_payload.sg_cnt,
1740 fh = fc_frame_header_get(fp);
1741 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
1742 hton24(fh->fh_d_id, did);
1743 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1744 fh->fh_type = FC_TYPE_CT;
1745 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1746 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1749 fh->fh_parm_offset = 0;
1751 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1758 info->lport = lport;
1759 info->rsp_code = FC_FS_ACC;
1760 info->nents = job->reply_payload.sg_cnt;
1761 info->sg = job->reply_payload.sg_list;
1763 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1770 * fc_lport_bsg_request() - The common entry point for sending
1771 * FC Passthrough requests
1772 * @job: The BSG passthrough job
1774 int fc_lport_bsg_request(struct fc_bsg_job *job)
1776 struct request *rsp = job->req->next_rq;
1777 struct Scsi_Host *shost = job->shost;
1778 struct fc_lport *lport = shost_priv(shost);
1779 struct fc_rport *rport;
1780 struct fc_rport_priv *rdata;
1784 job->reply->reply_payload_rcv_len = 0;
1785 rsp->resid_len = job->reply_payload.payload_len;
1787 mutex_lock(&lport->lp_mutex);
1789 switch (job->request->msgcode) {
1790 case FC_BSG_RPT_ELS:
1795 rdata = rport->dd_data;
1796 rc = fc_lport_els_request(job, lport, rport->port_id,
1805 rdata = rport->dd_data;
1806 rc = fc_lport_ct_request(job, lport, rport->port_id,
1811 did = ntoh24(job->request->rqst_data.h_ct.port_id);
1812 if (did == FC_FID_DIR_SERV)
1813 rdata = lport->dns_rdata;
1815 rdata = lport->tt.rport_lookup(lport, did);
1820 rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
1823 case FC_BSG_HST_ELS_NOLOGIN:
1824 did = ntoh24(job->request->rqst_data.h_els.port_id);
1825 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
1829 mutex_unlock(&lport->lp_mutex);
1832 EXPORT_SYMBOL(fc_lport_bsg_request);