Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

Conflicts:
	arch/x86/kernel/io_apic.c
	kernel/rcuclassic.c
	kernel/sched.c
	kernel/time/tick-sched.c

Signed-off-by: Mike Travis <travis@sgi.com>
[ mingo@elte.hu: backmerged typo fix for io_apic.c ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1604 insertions, 0 deletions

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
new file mode 100644
index 000000000000..0b9bdb1fb807
--- /dev/null
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -0,0 +1,1604 @@
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+/*
+ * PORT LOCKING NOTES
+ *
+ * These comments only apply to the 'port code' which consists of the lport,
+ * disc and rport blocks.
+ *
+ * MOTIVATION
+ *
+ * The lport, disc and rport blocks all have mutexes that are used to protect
+ * those objects. The main motivation for these locks is to prevent from
+ * having an lport reset just before we send a frame. In that scenario the
+ * lport's FID would get set to zero and then we'd send a frame with an
+ * invalid SID. We also need to ensure that states don't change unexpectedly
+ * while processing another state.
+ *
+ * HEIRARCHY
+ *
+ * The following heirarchy defines the locking rules. A greater lock
+ * may be held before acquiring a lesser lock, but a lesser lock should never
+ * be held while attempting to acquire a greater lock. Here is the heirarchy-
+ *
+ * lport > disc, lport > rport, disc > rport
+ *
+ * CALLBACKS
+ *
+ * The callbacks cause complications with this scheme. There is a callback
+ * from the rport (to either lport or disc) and a callback from disc
+ * (to the lport).
+ *
+ * As rports exit the rport state machine a callback is made to the owner of
+ * the rport to notify success or failure. Since the callback is likely to
+ * cause the lport or disc to grab its lock we cannot hold the rport lock
+ * while making the callback. To ensure that the rport is not free'd while
+ * processing the callback the rport callbacks are serialized through a
+ * single-threaded workqueue. An rport would never be free'd while in a
+ * callback handler becuase no other rport work in this queue can be executed
+ * at the same time.
+ *
+ * When discovery succeeds or fails a callback is made to the lport as
+ * notification. Currently, succesful discovery causes the lport to take no
+ * action. A failure will cause the lport to reset. There is likely a circular
+ * locking problem with this implementation.
+ */
+
+/*
+ * LPORT LOCKING
+ *
+ * The critical sections protected by the lport's mutex are quite broad and
+ * may be improved upon in the future. The lport code and its locking doesn't
+ * influence the I/O path, so excessive locking doesn't penalize I/O
+ * performance.
+ *
+ * The strategy is to lock whenever processing a request or response. Note
+ * that every _enter_* function corresponds to a state change. They generally
+ * change the lports state and then send a request out on the wire. We lock
+ * before calling any of these functions to protect that state change. This
+ * means that the entry points into the lport block manage the locks while
+ * the state machine can transition between states (i.e. _enter_* functions)
+ * while always staying protected.
+ *
+ * When handling responses we also hold the lport mutex broadly. When the
+ * lport receives the response frame it locks the mutex and then calls the
+ * appropriate handler for the particuar response. Generally a response will
+ * trigger a state change and so the lock must already be held.
+ *
+ * Retries also have to consider the locking. The retries occur from a work
+ * context and the work function will lock the lport and then retry the state
+ * (i.e. _enter_* function).
+ */
+
+#include <linux/timer.h>
+#include <asm/unaligned.h>
+
+#include <scsi/fc/fc_gs.h>
+
+#include <scsi/libfc.h>
+#include <scsi/fc_encode.h>
+
+/* Fabric IDs to use for point-to-point mode, chosen on whims. */
+#define FC_LOCAL_PTP_FID_LO   0x010101
+#define FC_LOCAL_PTP_FID_HI   0x010102
+
+#define	DNS_DELAY	      3 /* Discovery delay after RSCN (in seconds)*/
+
+static int fc_lport_debug;
+
+#define FC_DEBUG_LPORT(fmt...)			\
+	do {					\
+		if (fc_lport_debug)		\
+			FC_DBG(fmt);		\
+	} while (0)
+
+static void fc_lport_error(struct fc_lport *, struct fc_frame *);
+
+static void fc_lport_enter_reset(struct fc_lport *);
+static void fc_lport_enter_flogi(struct fc_lport *);
+static void fc_lport_enter_dns(struct fc_lport *);
+static void fc_lport_enter_rpn_id(struct fc_lport *);
+static void fc_lport_enter_rft_id(struct fc_lport *);
+static void fc_lport_enter_scr(struct fc_lport *);
+static void fc_lport_enter_ready(struct fc_lport *);
+static void fc_lport_enter_logo(struct fc_lport *);
+
+static const char *fc_lport_state_names[] = {
+	[LPORT_ST_NONE] =     "none",
+	[LPORT_ST_FLOGI] =    "FLOGI",
+	[LPORT_ST_DNS] =      "dNS",
+	[LPORT_ST_RPN_ID] =   "RPN_ID",
+	[LPORT_ST_RFT_ID] =   "RFT_ID",
+	[LPORT_ST_SCR] =      "SCR",
+	[LPORT_ST_READY] =    "Ready",
+	[LPORT_ST_LOGO] =     "LOGO",
+	[LPORT_ST_RESET] =    "reset",
+};
+
+static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
+{
+	fc_frame_free(fp);
+	return 0;
+}
+
+/**
+ * fc_lport_rport_callback - Event handler for rport events
+ * @lport: The lport which is receiving the event
+ * @rport: The rport which the event has occured on
+ * @event: The event that occured
+ *
+ * Locking Note: The rport lock should not be held when calling
+ *		 this function.
+ */
+static void fc_lport_rport_callback(struct fc_lport *lport,
+				    struct fc_rport *rport,
+				    enum fc_rport_event event)
+{
+	FC_DEBUG_LPORT("Received a %d event for port (%6x)\n", event,
+		       rport->port_id);
+
+	switch (event) {
+	case RPORT_EV_CREATED:
+		if (rport->port_id == FC_FID_DIR_SERV) {
+			mutex_lock(&lport->lp_mutex);
+			if (lport->state == LPORT_ST_DNS) {
+				lport->dns_rp = rport;
+				fc_lport_enter_rpn_id(lport);
+			} else {
+				FC_DEBUG_LPORT("Received an CREATED event on "
+					       "port (%6x) for the directory "
+					       "server, but the lport is not "
+					       "in the DNS state, it's in the "
+					       "%d state", rport->port_id,
+					       lport->state);
+				lport->tt.rport_logoff(rport);
+			}
+			mutex_unlock(&lport->lp_mutex);
+		} else
+			FC_DEBUG_LPORT("Received an event for port (%6x) "
+				       "which is not the directory server\n",
+				       rport->port_id);
+		break;
+	case RPORT_EV_LOGO:
+	case RPORT_EV_FAILED:
+	case RPORT_EV_STOP:
+		if (rport->port_id == FC_FID_DIR_SERV) {
+			mutex_lock(&lport->lp_mutex);
+			lport->dns_rp = NULL;
+			mutex_unlock(&lport->lp_mutex);
+
+		} else
+			FC_DEBUG_LPORT("Received an event for port (%6x) "
+				       "which is not the directory server\n",
+				       rport->port_id);
+		break;
+	case RPORT_EV_NONE:
+		break;
+	}
+}
+
+/**
+ * fc_lport_state - Return a string which represents the lport's state
+ * @lport: The lport whose state is to converted to a string
+ */
+static const char *fc_lport_state(struct fc_lport *lport)
+{
+	const char *cp;
+
+	cp = fc_lport_state_names[lport->state];
+	if (!cp)
+		cp = "unknown";
+	return cp;
+}
+
+/**
+ * fc_lport_ptp_setup - Create an rport for point-to-point mode
+ * @lport: The lport to attach the ptp rport to
+ * @fid: The FID of the ptp rport
+ * @remote_wwpn: The WWPN of the ptp rport
+ * @remote_wwnn: The WWNN of the ptp rport
+ */
+static void fc_lport_ptp_setup(struct fc_lport *lport,
+			       u32 remote_fid, u64 remote_wwpn,
+			       u64 remote_wwnn)
+{
+	struct fc_disc_port dp;
+
+	dp.lp = lport;
+	dp.ids.port_id = remote_fid;
+	dp.ids.port_name = remote_wwpn;
+	dp.ids.node_name = remote_wwnn;
+	dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
+
+	if (lport->ptp_rp) {
+		lport->tt.rport_logoff(lport->ptp_rp);
+		lport->ptp_rp = NULL;
+	}
+
+	lport->ptp_rp = fc_rport_rogue_create(&dp);
+
+	lport->tt.rport_login(lport->ptp_rp);
+
+	fc_lport_enter_ready(lport);
+}
+
+void fc_get_host_port_type(struct Scsi_Host *shost)
+{
+	/* TODO - currently just NPORT */
+	fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
+}
+EXPORT_SYMBOL(fc_get_host_port_type);
+
+void fc_get_host_port_state(struct Scsi_Host *shost)
+{
+	struct fc_lport *lp = shost_priv(shost);
+
+	if ((lp->link_status & FC_LINK_UP) == FC_LINK_UP)
+		fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+	else
+		fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
+}
+EXPORT_SYMBOL(fc_get_host_port_state);
+
+void fc_get_host_speed(struct Scsi_Host *shost)
+{
+	struct fc_lport *lport = shost_priv(shost);
+
+	fc_host_speed(shost) = lport->link_speed;
+}
+EXPORT_SYMBOL(fc_get_host_speed);
+
+struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
+{
+	int i;
+	struct fc_host_statistics *fcoe_stats;
+	struct fc_lport *lp = shost_priv(shost);
+	struct timespec v0, v1;
+
+	fcoe_stats = &lp->host_stats;
+	memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
+
+	jiffies_to_timespec(jiffies, &v0);
+	jiffies_to_timespec(lp->boot_time, &v1);
+	fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
+
+	for_each_online_cpu(i) {
+		struct fcoe_dev_stats *stats = lp->dev_stats[i];
+		if (stats == NULL)
+			continue;
+		fcoe_stats->tx_frames += stats->TxFrames;
+		fcoe_stats->tx_words += stats->TxWords;
+		fcoe_stats->rx_frames += stats->RxFrames;
+		fcoe_stats->rx_words += stats->RxWords;
+		fcoe_stats->error_frames += stats->ErrorFrames;
+		fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
+		fcoe_stats->fcp_input_requests += stats->InputRequests;
+		fcoe_stats->fcp_output_requests += stats->OutputRequests;
+		fcoe_stats->fcp_control_requests += stats->ControlRequests;
+		fcoe_stats->fcp_input_megabytes += stats->InputMegabytes;
+		fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes;
+		fcoe_stats->link_failure_count += stats->LinkFailureCount;
+	}
+	fcoe_stats->lip_count = -1;
+	fcoe_stats->nos_count = -1;
+	fcoe_stats->loss_of_sync_count = -1;
+	fcoe_stats->loss_of_signal_count = -1;
+	fcoe_stats->prim_seq_protocol_err_count = -1;
+	fcoe_stats->dumped_frames = -1;
+	return fcoe_stats;
+}
+EXPORT_SYMBOL(fc_get_host_stats);
+
+/*
+ * Fill in FLOGI command for request.
+ */
+static void
+fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi,
+		    unsigned int op)
+{
+	struct fc_els_csp *sp;
+	struct fc_els_cssp *cp;
+
+	memset(flogi, 0, sizeof(*flogi));
+	flogi->fl_cmd = (u8) op;
+	put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
+	put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
+	sp = &flogi->fl_csp;
+	sp->sp_hi_ver = 0x20;
+	sp->sp_lo_ver = 0x20;
+	sp->sp_bb_cred = htons(10);	/* this gets set by gateway */
+	sp->sp_bb_data = htons((u16) lport->mfs);
+	cp = &flogi->fl_cssp[3 - 1];	/* class 3 parameters */
+	cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
+	if (op != ELS_FLOGI) {
+		sp->sp_features = htons(FC_SP_FT_CIRO);
+		sp->sp_tot_seq = htons(255);	/* seq. we accept */
+		sp->sp_rel_off = htons(0x1f);
+		sp->sp_e_d_tov = htonl(lport->e_d_tov);
+
+		cp->cp_rdfs = htons((u16) lport->mfs);
+		cp->cp_con_seq = htons(255);
+		cp->cp_open_seq = 1;
+	}
+}
+
+/*
+ * Add a supported FC-4 type.
+ */
+static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
+{
+	__be32 *mp;
+
+	mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
+	*mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
+}
+
+/**
+ * fc_lport_recv_rlir_req - Handle received Registered Link Incident Report.
+ * @lport: Fibre Channel local port recieving the RLIR
+ * @sp: current sequence in the RLIR exchange
+ * @fp: RLIR request frame
+ *
+ * Locking Note: The lport lock is exected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
+				   struct fc_lport *lport)
+{
+	FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
+		       fc_lport_state(lport));
+
+	lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
+	fc_frame_free(fp);
+}
+
+/**
+ * fc_lport_recv_echo_req - Handle received ECHO request
+ * @lport: Fibre Channel local port recieving the ECHO
+ * @sp: current sequence in the ECHO exchange
+ * @fp: ECHO request frame
+ *
+ * Locking Note: The lport lock is exected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
+				   struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_exch *ep = fc_seq_exch(sp);
+	unsigned int len;
+	void *pp;
+	void *dp;
+	u32 f_ctl;
+
+	FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
+		       fc_lport_state(lport));
+
+	len = fr_len(in_fp) - sizeof(struct fc_frame_header);
+	pp = fc_frame_payload_get(in_fp, len);
+
+	if (len < sizeof(__be32))
+		len = sizeof(__be32);
+
+	fp = fc_frame_alloc(lport, len);
+	if (fp) {
+		dp = fc_frame_payload_get(fp, len);
+		memcpy(dp, pp, len);
+		*((u32 *)dp) = htonl(ELS_LS_ACC << 24);
+		sp = lport->tt.seq_start_next(sp);
+		f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
+		fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+			       FC_TYPE_ELS, f_ctl, 0);
+		lport->tt.seq_send(lport, sp, fp);
+	}
+	fc_frame_free(in_fp);
+}
+
+/**
+ * fc_lport_recv_echo_req - Handle received Request Node ID data request
+ * @lport: Fibre Channel local port recieving the RNID
+ * @sp: current sequence in the RNID exchange
+ * @fp: RNID request frame
+ *
+ * Locking Note: The lport lock is exected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
+				   struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_exch *ep = fc_seq_exch(sp);
+	struct fc_els_rnid *req;
+	struct {
+		struct fc_els_rnid_resp rnid;
+		struct fc_els_rnid_cid cid;
+		struct fc_els_rnid_gen gen;
+	} *rp;
+	struct fc_seq_els_data rjt_data;
+	u8 fmt;
+	size_t len;
+	u32 f_ctl;
+
+	FC_DEBUG_LPORT("Received RNID request while in state %s\n",
+		       fc_lport_state(lport));
+
+	req = fc_frame_payload_get(in_fp, sizeof(*req));
+	if (!req) {
+		rjt_data.fp = NULL;
+		rjt_data.reason = ELS_RJT_LOGIC;
+		rjt_data.explan = ELS_EXPL_NONE;
+		lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+	} else {
+		fmt = req->rnid_fmt;
+		len = sizeof(*rp);
+		if (fmt != ELS_RNIDF_GEN ||
+		    ntohl(lport->rnid_gen.rnid_atype) == 0) {
+			fmt = ELS_RNIDF_NONE;	/* nothing to provide */
+			len -= sizeof(rp->gen);
+		}
+		fp = fc_frame_alloc(lport, len);
+		if (fp) {
+			rp = fc_frame_payload_get(fp, len);
+			memset(rp, 0, len);
+			rp->rnid.rnid_cmd = ELS_LS_ACC;
+			rp->rnid.rnid_fmt = fmt;
+			rp->rnid.rnid_cid_len = sizeof(rp->cid);
+			rp->cid.rnid_wwpn = htonll(lport->wwpn);
+			rp->cid.rnid_wwnn = htonll(lport->wwnn);
+			if (fmt == ELS_RNIDF_GEN) {
+				rp->rnid.rnid_sid_len = sizeof(rp->gen);
+				memcpy(&rp->gen, &lport->rnid_gen,
+				       sizeof(rp->gen));
+			}
+			sp = lport->tt.seq_start_next(sp);
+			f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
+			f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
+			fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+				       FC_TYPE_ELS, f_ctl, 0);
+			lport->tt.seq_send(lport, sp, fp);
+		}
+	}
+	fc_frame_free(in_fp);
+}
+
+/**
+ * fc_lport_recv_adisc_req - Handle received Address Discovery Request
+ * @lport: Fibre Channel local port recieving the ADISC
+ * @sp: current sequence in the ADISC exchange
+ * @fp: ADISC request frame
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp,
+				    struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_exch *ep = fc_seq_exch(sp);
+	struct fc_els_adisc *req, *rp;
+	struct fc_seq_els_data rjt_data;
+	size_t len;
+	u32 f_ctl;
+
+	FC_DEBUG_LPORT("Received ADISC request while in state %s\n",
+		       fc_lport_state(lport));
+
+	req = fc_frame_payload_get(in_fp, sizeof(*req));
+	if (!req) {
+		rjt_data.fp = NULL;
+		rjt_data.reason = ELS_RJT_LOGIC;
+		rjt_data.explan = ELS_EXPL_NONE;
+		lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+	} else {
+		len = sizeof(*rp);
+		fp = fc_frame_alloc(lport, len);
+		if (fp) {
+			rp = fc_frame_payload_get(fp, len);
+			memset(rp, 0, len);
+			rp->adisc_cmd = ELS_LS_ACC;
+			rp->adisc_wwpn = htonll(lport->wwpn);
+			rp->adisc_wwnn = htonll(lport->wwnn);
+			hton24(rp->adisc_port_id,
+			       fc_host_port_id(lport->host));
+			sp = lport->tt.seq_start_next(sp);
+			f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
+			f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
+			fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+				       FC_TYPE_ELS, f_ctl, 0);
+			lport->tt.seq_send(lport, sp, fp);
+		}
+	}
+	fc_frame_free(in_fp);
+}
+
+/**
+ * fc_lport_recv_logo_req - Handle received fabric LOGO request
+ * @lport: Fibre Channel local port recieving the LOGO
+ * @sp: current sequence in the LOGO exchange
+ * @fp: LOGO request frame
+ *
+ * Locking Note: The lport lock is exected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
+				   struct fc_lport *lport)
+{
+	lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
+	fc_lport_enter_reset(lport);
+	fc_frame_free(fp);
+}
+
+/**
+ * fc_fabric_login - Start the lport state machine
+ * @lport: The lport that should log into the fabric
+ *
+ * Locking Note: This function should not be called
+ *		 with the lport lock held.
+ */
+int fc_fabric_login(struct fc_lport *lport)
+{
+	int rc = -1;
+
+	mutex_lock(&lport->lp_mutex);
+	if (lport->state == LPORT_ST_NONE) {
+		fc_lport_enter_reset(lport);
+		rc = 0;
+	}
+	mutex_unlock(&lport->lp_mutex);
+
+	return rc;
+}
+EXPORT_SYMBOL(fc_fabric_login);
+
+/**
+ * fc_linkup - Handler for transport linkup events
+ * @lport: The lport whose link is up
+ */
+void fc_linkup(struct fc_lport *lport)
+{
+	FC_DEBUG_LPORT("Link is up for port (%6x)\n",
+		       fc_host_port_id(lport->host));
+
+	mutex_lock(&lport->lp_mutex);
+	if ((lport->link_status & FC_LINK_UP) != FC_LINK_UP) {
+		lport->link_status |= FC_LINK_UP;
+
+		if (lport->state == LPORT_ST_RESET)
+			fc_lport_enter_flogi(lport);
+	}
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_linkup);
+
+/**
+ * fc_linkdown - Handler for transport linkdown events
+ * @lport: The lport whose link is down
+ */
+void fc_linkdown(struct fc_lport *lport)
+{
+	mutex_lock(&lport->lp_mutex);
+	FC_DEBUG_LPORT("Link is down for port (%6x)\n",
+		       fc_host_port_id(lport->host));
+
+	if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) {
+		lport->link_status &= ~(FC_LINK_UP);
+		fc_lport_enter_reset(lport);
+		lport->tt.fcp_cleanup(lport);
+	}
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_linkdown);
+
+/**
+ * fc_pause - Pause the flow of frames
+ * @lport: The lport to be paused
+ */
+void fc_pause(struct fc_lport *lport)
+{
+	mutex_lock(&lport->lp_mutex);
+	lport->link_status |= FC_PAUSE;
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_pause);
+
+/**
+ * fc_unpause - Unpause the flow of frames
+ * @lport: The lport to be unpaused
+ */
+void fc_unpause(struct fc_lport *lport)
+{
+	mutex_lock(&lport->lp_mutex);
+	lport->link_status &= ~(FC_PAUSE);
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_unpause);
+
+/**
+ * fc_fabric_logoff - Logout of the fabric
+ * @lport:	      fc_lport pointer to logoff the fabric
+ *
+ * Return value:
+ *	0 for success, -1 for failure
+ **/
+int fc_fabric_logoff(struct fc_lport *lport)
+{
+	lport->tt.disc_stop_final(lport);
+	mutex_lock(&lport->lp_mutex);
+	fc_lport_enter_logo(lport);
+	mutex_unlock(&lport->lp_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(fc_fabric_logoff);
+
+/**
+ * fc_lport_destroy - unregister a fc_lport
+ * @lport:	      fc_lport pointer to unregister
+ *
+ * Return value:
+ *	None
+ * Note:
+ * exit routine for fc_lport instance
+ * clean-up all the allocated memory
+ * and free up other system resources.
+ *
+ **/
+int fc_lport_destroy(struct fc_lport *lport)
+{
+	lport->tt.frame_send = fc_frame_drop;
+	lport->tt.fcp_abort_io(lport);
+	lport->tt.exch_mgr_reset(lport->emp, 0, 0);
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_destroy);
+
+/**
+ * fc_set_mfs - sets up the mfs for the corresponding fc_lport
+ * @lport: fc_lport pointer to unregister
+ * @mfs: the new mfs for fc_lport
+ *
+ * Set mfs for the given fc_lport to the new mfs.
+ *
+ * Return: 0 for success
+ *
+ **/
+int fc_set_mfs(struct fc_lport *lport, u32 mfs)
+{
+	unsigned int old_mfs;
+	int rc = -EINVAL;
+
+	mutex_lock(&lport->lp_mutex);
+
+	old_mfs = lport->mfs;
+
+	if (mfs >= FC_MIN_MAX_FRAME) {
+		mfs &= ~3;
+		if (mfs > FC_MAX_FRAME)
+			mfs = FC_MAX_FRAME;
+		mfs -= sizeof(struct fc_frame_header);
+		lport->mfs = mfs;
+		rc = 0;
+	}
+
+	if (!rc && mfs < old_mfs)
+		fc_lport_enter_reset(lport);
+
+	mutex_unlock(&lport->lp_mutex);
+
+	return rc;
+}
+EXPORT_SYMBOL(fc_set_mfs);
+
+/**
+ * fc_lport_disc_callback - Callback for discovery events
+ * @lport: FC local port
+ * @event: The discovery event
+ */
+void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
+{
+	switch (event) {
+	case DISC_EV_SUCCESS:
+		FC_DEBUG_LPORT("Got a SUCCESS event for port (%6x)\n",
+			       fc_host_port_id(lport->host));
+		break;
+	case DISC_EV_FAILED:
+		FC_DEBUG_LPORT("Got a FAILED event for port (%6x)\n",
+			       fc_host_port_id(lport->host));
+		mutex_lock(&lport->lp_mutex);
+		fc_lport_enter_reset(lport);
+		mutex_unlock(&lport->lp_mutex);
+		break;
+	case DISC_EV_NONE:
+		WARN_ON(1);
+		break;
+	}
+}
+
+/**
+ * fc_rport_enter_ready - Enter the ready state and start discovery
+ * @lport: Fibre Channel local port that is ready
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_ready(struct fc_lport *lport)
+{
+	FC_DEBUG_LPORT("Port (%6x) entered Ready from state %s\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_READY);
+
+	lport->tt.disc_start(fc_lport_disc_callback, lport);
+}
+
+/**
+ * fc_lport_recv_flogi_req - Receive a FLOGI request
+ * @sp_in: The sequence the FLOGI is on
+ * @rx_fp: The frame the FLOGI is in
+ * @lport: The lport that recieved the request
+ *
+ * A received FLOGI request indicates a point-to-point connection.
+ * Accept it with the common service parameters indicating our N port.
+ * Set up to do a PLOGI if we have the higher-number WWPN.
+ *
+ * Locking Note: The lport lock is exected to be held before calling
+ * this function.
+ */
+static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
+				    struct fc_frame *rx_fp,
+				    struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	struct fc_seq *sp;
+	struct fc_exch *ep;
+	struct fc_els_flogi *flp;
+	struct fc_els_flogi *new_flp;
+	u64 remote_wwpn;
+	u32 remote_fid;
+	u32 local_fid;
+	u32 f_ctl;
+
+	FC_DEBUG_LPORT("Received FLOGI request while in state %s\n",
+		       fc_lport_state(lport));
+
+	fh = fc_frame_header_get(rx_fp);
+	remote_fid = ntoh24(fh->fh_s_id);
+	flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
+	if (!flp)
+		goto out;
+	remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
+	if (remote_wwpn == lport->wwpn) {
+		FC_DBG("FLOGI from port with same WWPN %llx "
+		       "possible configuration error\n", remote_wwpn);
+		goto out;
+	}
+	FC_DBG("FLOGI from port WWPN %llx\n", remote_wwpn);
+
+	/*
+	 * XXX what is the right thing to do for FIDs?
+	 * The originator might expect our S_ID to be 0xfffffe.
+	 * But if so, both of us could end up with the same FID.
+	 */
+	local_fid = FC_LOCAL_PTP_FID_LO;
+	if (remote_wwpn < lport->wwpn) {
+		local_fid = FC_LOCAL_PTP_FID_HI;
+		if (!remote_fid || remote_fid == local_fid)
+			remote_fid = FC_LOCAL_PTP_FID_LO;
+	} else if (!remote_fid) {
+		remote_fid = FC_LOCAL_PTP_FID_HI;
+	}
+
+	fc_host_port_id(lport->host) = local_fid;
+
+	fp = fc_frame_alloc(lport, sizeof(*flp));
+	if (fp) {
+		sp = lport->tt.seq_start_next(fr_seq(rx_fp));
+		new_flp = fc_frame_payload_get(fp, sizeof(*flp));
+		fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
+		new_flp->fl_cmd = (u8) ELS_LS_ACC;
+
+		/*
+		 * Send the response.  If this fails, the originator should
+		 * repeat the sequence.
+		 */
+		f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
+		ep = fc_seq_exch(sp);
+		fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+			       FC_TYPE_ELS, f_ctl, 0);
+		lport->tt.seq_send(lport, sp, fp);
+
+	} else {
+		fc_lport_error(lport, fp);
+	}
+	fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
+			   get_unaligned_be64(&flp->fl_wwnn));
+
+	lport->tt.disc_start(fc_lport_disc_callback, lport);
+
+out:
+	sp = fr_seq(rx_fp);
+	fc_frame_free(rx_fp);
+}
+
+/**
+ * fc_lport_recv_req - The generic lport request handler
+ * @lport: The lport that received the request
+ * @sp: The sequence the request is on
+ * @fp: The frame the request is in
+ *
+ * This function will see if the lport handles the request or
+ * if an rport should handle the request.
+ *
+ * Locking Note: This function should not be called with the lport
+ *		 lock held becuase it will grab the lock.
+ */
+static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
+			      struct fc_frame *fp)
+{
+	struct fc_frame_header *fh = fc_frame_header_get(fp);
+	void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
+	struct fc_rport *rport;
+	u32 s_id;
+	u32 d_id;
+	struct fc_seq_els_data rjt_data;
+
+	mutex_lock(&lport->lp_mutex);
+
+	/*
+	 * Handle special ELS cases like FLOGI, LOGO, and
+	 * RSCN here.  These don't require a session.
+	 * Even if we had a session, it might not be ready.
+	 */
+	if (fh->fh_type == FC_TYPE_ELS && fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
+		/*
+		 * Check opcode.
+		 */
+		recv = NULL;
+		switch (fc_frame_payload_op(fp)) {
+		case ELS_FLOGI:
+			recv = fc_lport_recv_flogi_req;
+			break;
+		case ELS_LOGO:
+			fh = fc_frame_header_get(fp);
+			if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
+				recv = fc_lport_recv_logo_req;
+			break;
+		case ELS_RSCN:
+			recv = lport->tt.disc_recv_req;
+			break;
+		case ELS_ECHO:
+			recv = fc_lport_recv_echo_req;
+			break;
+		case ELS_RLIR:
+			recv = fc_lport_recv_rlir_req;
+			break;
+		case ELS_RNID:
+			recv = fc_lport_recv_rnid_req;
+			break;
+		case ELS_ADISC:
+			recv = fc_lport_recv_adisc_req;
+			break;
+		}
+
+		if (recv)
+			recv(sp, fp, lport);
+		else {
+			/*
+			 * Find session.
+			 * If this is a new incoming PLOGI, we won't find it.
+			 */
+			s_id = ntoh24(fh->fh_s_id);
+			d_id = ntoh24(fh->fh_d_id);
+
+			rport = lport->tt.rport_lookup(lport, s_id);
+			if (rport)
+				lport->tt.rport_recv_req(sp, fp, rport);
+			else {
+				rjt_data.fp = NULL;
+				rjt_data.reason = ELS_RJT_UNAB;
+				rjt_data.explan = ELS_EXPL_NONE;
+				lport->tt.seq_els_rsp_send(sp,
+							   ELS_LS_RJT,
+							   &rjt_data);
+				fc_frame_free(fp);
+			}
+		}
+	} else {
+		FC_DBG("dropping invalid frame (eof %x)\n", fr_eof(fp));
+		fc_frame_free(fp);
+	}
+	mutex_unlock(&lport->lp_mutex);
+
+	/*
+	 *  The common exch_done for all request may not be good
+	 *  if any request requires longer hold on exhange. XXX
+	 */
+	lport->tt.exch_done(sp);
+}
+
+/**
+ * fc_lport_reset - Reset an lport
+ * @lport: The lport which should be reset
+ *
+ * Locking Note: This functions should not be called with the
+ *		 lport lock held.
+ */
+int fc_lport_reset(struct fc_lport *lport)
+{
+	mutex_lock(&lport->lp_mutex);
+	fc_lport_enter_reset(lport);
+	mutex_unlock(&lport->lp_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_reset);
+
+/**
+ * fc_rport_enter_reset - Reset the local port
+ * @lport: Fibre Channel local port to be reset
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_reset(struct fc_lport *lport)
+{
+	FC_DEBUG_LPORT("Port (%6x) entered RESET state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RESET);
+
+	if (lport->dns_rp)
+		lport->tt.rport_logoff(lport->dns_rp);
+
+	if (lport->ptp_rp) {
+		lport->tt.rport_logoff(lport->ptp_rp);
+		lport->ptp_rp = NULL;
+	}
+
+	lport->tt.disc_stop(lport);
+
+	lport->tt.exch_mgr_reset(lport->emp, 0, 0);
+	fc_host_fabric_name(lport->host) = 0;
+	fc_host_port_id(lport->host) = 0;
+
+	if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP)
+		fc_lport_enter_flogi(lport);
+}
+
+/**
+ * fc_lport_error - Handler for any errors
+ * @lport: The fc_lport object
+ * @fp: The frame pointer
+ *
+ * If the error was caused by a resource allocation failure
+ * then wait for half a second and retry, otherwise retry
+ * after the e_d_tov time.
+ */
+static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
+{
+	unsigned long delay = 0;
+	FC_DEBUG_LPORT("Error %ld in state %s, retries %d\n",
+		       PTR_ERR(fp), fc_lport_state(lport),
+		       lport->retry_count);
+
+	if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
+		/*
+		 * Memory allocation failure, or the exchange timed out.
+		 *  Retry after delay
+		 */
+		if (lport->retry_count < lport->max_retry_count) {
+			lport->retry_count++;
+			if (!fp)
+				delay = msecs_to_jiffies(500);
+			else
+				delay =	msecs_to_jiffies(lport->e_d_tov);
+
+			schedule_delayed_work(&lport->retry_work, delay);
+		} else {
+			switch (lport->state) {
+			case LPORT_ST_NONE:
+			case LPORT_ST_READY:
+			case LPORT_ST_RESET:
+			case LPORT_ST_RPN_ID:
+			case LPORT_ST_RFT_ID:
+			case LPORT_ST_SCR:
+			case LPORT_ST_DNS:
+			case LPORT_ST_FLOGI:
+			case LPORT_ST_LOGO:
+				fc_lport_enter_reset(lport);
+				break;
+			}
+		}
+	}
+}
+
+/**
+ * fc_lport_rft_id_resp - Handle response to Register Fibre
+ *			  Channel Types by ID (RPN_ID) request
+ * @sp: current sequence in RPN_ID exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel host port instance
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp,
+				 void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_ct_hdr *ct;
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	FC_DEBUG_LPORT("Received a RFT_ID response\n");
+
+	if (lport->state != LPORT_ST_RFT_ID) {
+		FC_DBG("Received a RFT_ID response, but in state %s\n",
+		       fc_lport_state(lport));
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	ct = fc_frame_payload_get(fp, sizeof(*ct));
+
+	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
+	    ct->ct_fs_type == FC_FST_DIR &&
+	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
+	    ntohs(ct->ct_cmd) == FC_FS_ACC)
+		fc_lport_enter_scr(lport);
+	else
+		fc_lport_error(lport, fp);
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_rpn_id_resp - Handle response to Register Port
+ *			  Name by ID (RPN_ID) request
+ * @sp: current sequence in RPN_ID exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel host port instance
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
+				 void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_ct_hdr *ct;
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	FC_DEBUG_LPORT("Received a RPN_ID response\n");
+
+	if (lport->state != LPORT_ST_RPN_ID) {
+		FC_DBG("Received a RPN_ID response, but in state %s\n",
+		       fc_lport_state(lport));
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	ct = fc_frame_payload_get(fp, sizeof(*ct));
+	if (fh && ct && fh->fh_type == FC_TYPE_CT &&
+	    ct->ct_fs_type == FC_FST_DIR &&
+	    ct->ct_fs_subtype == FC_NS_SUBTYPE &&
+	    ntohs(ct->ct_cmd) == FC_FS_ACC)
+		fc_lport_enter_rft_id(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_scr_resp - Handle response to State Change Register (SCR) request
+ * @sp: current sequence in SCR exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel lport port instance that sent the registration request
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
+			      void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	u8 op;
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	FC_DEBUG_LPORT("Received a SCR response\n");
+
+	if (lport->state != LPORT_ST_SCR) {
+		FC_DBG("Received a SCR response, but in state %s\n",
+		       fc_lport_state(lport));
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	op = fc_frame_payload_op(fp);
+	if (op == ELS_LS_ACC)
+		fc_lport_enter_ready(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_enter_scr - Send a State Change Register (SCR) request
+ * @lport: Fibre Channel local port to register for state changes
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_scr(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	FC_DEBUG_LPORT("Port (%6x) entered SCR state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_SCR);
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, NULL, fp, ELS_SCR,
+				  fc_lport_scr_resp, lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
+ * fc_lport_enter_rft_id - Register FC4-types with the name server
+ * @lport: Fibre Channel local port to register
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_rft_id(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_ns_fts *lps;
+	int i;
+
+	FC_DEBUG_LPORT("Port (%6x) entered RFT_ID state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RFT_ID);
+
+	lps = &lport->fcts;
+	i = sizeof(lps->ff_type_map) / sizeof(lps->ff_type_map[0]);
+	while (--i >= 0)
+		if (ntohl(lps->ff_type_map[i]) != 0)
+			break;
+	if (i < 0) {
+		/* nothing to register, move on to SCR */
+		fc_lport_enter_scr(lport);
+		return;
+	}
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rft));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RFT_ID,
+				  fc_lport_rft_id_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
+ * fc_rport_enter_rft_id - Register port name with the name server
+ * @lport: Fibre Channel local port to register
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_rpn_id(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	FC_DEBUG_LPORT("Port (%6x) entered RPN_ID state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_RPN_ID);
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    sizeof(struct fc_ns_rn_id));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RPN_ID,
+				  fc_lport_rpn_id_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+static struct fc_rport_operations fc_lport_rport_ops = {
+	.event_callback = fc_lport_rport_callback,
+};
+
+/**
+ * fc_rport_enter_dns - Create a rport to the name server
+ * @lport: Fibre Channel local port requesting a rport for the name server
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_dns(struct fc_lport *lport)
+{
+	struct fc_rport *rport;
+	struct fc_rport_libfc_priv *rdata;
+	struct fc_disc_port dp;
+
+	dp.ids.port_id = FC_FID_DIR_SERV;
+	dp.ids.port_name = -1;
+	dp.ids.node_name = -1;
+	dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
+	dp.lp = lport;
+
+	FC_DEBUG_LPORT("Port (%6x) entered DNS state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_DNS);
+
+	rport = fc_rport_rogue_create(&dp);
+	if (!rport)
+		goto err;
+
+	rdata = rport->dd_data;
+	rdata->ops = &fc_lport_rport_ops;
+	lport->tt.rport_login(rport);
+	return;
+
+err:
+	fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_timeout - Handler for the retry_work timer.
+ * @work: The work struct of the fc_lport
+ */
+static void fc_lport_timeout(struct work_struct *work)
+{
+	struct fc_lport *lport =
+		container_of(work, struct fc_lport,
+			     retry_work.work);
+
+	mutex_lock(&lport->lp_mutex);
+
+	switch (lport->state) {
+	case LPORT_ST_NONE:
+	case LPORT_ST_READY:
+	case LPORT_ST_RESET:
+		WARN_ON(1);
+		break;
+	case LPORT_ST_FLOGI:
+		fc_lport_enter_flogi(lport);
+		break;
+	case LPORT_ST_DNS:
+		fc_lport_enter_dns(lport);
+		break;
+	case LPORT_ST_RPN_ID:
+		fc_lport_enter_rpn_id(lport);
+		break;
+	case LPORT_ST_RFT_ID:
+		fc_lport_enter_rft_id(lport);
+		break;
+	case LPORT_ST_SCR:
+		fc_lport_enter_scr(lport);
+		break;
+	case LPORT_ST_LOGO:
+		fc_lport_enter_logo(lport);
+		break;
+	}
+
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_logo_resp - Handle response to LOGO request
+ * @sp: current sequence in LOGO exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel lport port instance that sent the LOGO request
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
+			       void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	u8 op;
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	FC_DEBUG_LPORT("Received a LOGO response\n");
+
+	if (lport->state != LPORT_ST_LOGO) {
+		FC_DBG("Received a LOGO response, but in state %s\n",
+		       fc_lport_state(lport));
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	op = fc_frame_payload_op(fp);
+	if (op == ELS_LS_ACC)
+		fc_lport_enter_reset(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_rport_enter_logo - Logout of the fabric
+ * @lport: Fibre Channel local port to be logged out
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_logo(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_els_logo *logo;
+
+	FC_DEBUG_LPORT("Port (%6x) entered LOGO state from %s state\n",
+		       fc_host_port_id(lport->host), fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_LOGO);
+
+	/* DNS session should be closed so we can release it here */
+	if (lport->dns_rp)
+		lport->tt.rport_logoff(lport->dns_rp);
+
+	fp = fc_frame_alloc(lport, sizeof(*logo));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, NULL, fp, ELS_LOGO, fc_lport_logo_resp,
+				  lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
+ * fc_lport_flogi_resp - Handle response to FLOGI request
+ * @sp: current sequence in FLOGI exchange
+ * @fp: response frame
+ * @lp_arg: Fibre Channel lport port instance that sent the FLOGI request
+ *
+ * Locking Note: This function will be called without the lport lock
+ * held, but it will lock, call an _enter_* function or fc_lport_error
+ * and then unlock the lport.
+ */
+static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
+				void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	struct fc_frame_header *fh;
+	struct fc_els_flogi *flp;
+	u32 did;
+	u16 csp_flags;
+	unsigned int r_a_tov;
+	unsigned int e_d_tov;
+	u16 mfs;
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	FC_DEBUG_LPORT("Received a FLOGI response\n");
+
+	if (lport->state != LPORT_ST_FLOGI) {
+		FC_DBG("Received a FLOGI response, but in state %s\n",
+		       fc_lport_state(lport));
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	did = ntoh24(fh->fh_d_id);
+	if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
+
+		FC_DEBUG_LPORT("Assigned fid %x\n", did);
+		fc_host_port_id(lport->host) = did;
+
+		flp = fc_frame_payload_get(fp, sizeof(*flp));
+		if (flp) {
+			mfs = ntohs(flp->fl_csp.sp_bb_data) &
+				FC_SP_BB_DATA_MASK;
+			if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
+			    mfs < lport->mfs)
+				lport->mfs = mfs;
+			csp_flags = ntohs(flp->fl_csp.sp_features);
+			r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
+			e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
+			if (csp_flags & FC_SP_FT_EDTR)
+				e_d_tov /= 1000000;
+			if ((csp_flags & FC_SP_FT_FPORT) == 0) {
+				if (e_d_tov > lport->e_d_tov)
+					lport->e_d_tov = e_d_tov;
+				lport->r_a_tov = 2 * e_d_tov;
+				FC_DBG("Point-to-Point mode\n");
+				fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id),
+						   get_unaligned_be64(
+							   &flp->fl_wwpn),
+						   get_unaligned_be64(
+							   &flp->fl_wwnn));
+			} else {
+				lport->e_d_tov = e_d_tov;
+				lport->r_a_tov = r_a_tov;
+				fc_host_fabric_name(lport->host) =
+					get_unaligned_be64(&flp->fl_wwnn);
+				fc_lport_enter_dns(lport);
+			}
+		}
+
+		if (flp) {
+			csp_flags = ntohs(flp->fl_csp.sp_features);
+			if ((csp_flags & FC_SP_FT_FPORT) == 0) {
+				lport->tt.disc_start(fc_lport_disc_callback,
+						     lport);
+			}
+		}
+	} else {
+		FC_DBG("bad FLOGI response\n");
+	}
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_rport_enter_flogi - Send a FLOGI request to the fabric manager
+ * @lport: Fibre Channel local port to be logged in to the fabric
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+void fc_lport_enter_flogi(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	FC_DEBUG_LPORT("Processing FLOGI state\n");
+
+	fc_lport_state_enter(lport, LPORT_ST_FLOGI);
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
+	if (!fp)
+		return fc_lport_error(lport, fp);
+
+	if (!lport->tt.elsct_send(lport, NULL, fp, ELS_FLOGI,
+				  fc_lport_flogi_resp, lport, lport->e_d_tov))
+		fc_lport_error(lport, fp);
+}
+
+/* Configure a fc_lport */
+int fc_lport_config(struct fc_lport *lport)
+{
+	INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
+	mutex_init(&lport->lp_mutex);
+
+	fc_lport_state_enter(lport, LPORT_ST_NONE);
+
+	fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
+	fc_lport_add_fc4_type(lport, FC_TYPE_CT);
+
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_config);
+
+int fc_lport_init(struct fc_lport *lport)
+{
+	if (!lport->tt.lport_recv)
+		lport->tt.lport_recv = fc_lport_recv_req;
+
+	if (!lport->tt.lport_reset)
+		lport->tt.lport_reset = fc_lport_reset;
+
+	fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
+	fc_host_node_name(lport->host) = lport->wwnn;
+	fc_host_port_name(lport->host) = lport->wwpn;
+	fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
+	memset(fc_host_supported_fc4s(lport->host), 0,
+	       sizeof(fc_host_supported_fc4s(lport->host)));
+	fc_host_supported_fc4s(lport->host)[2] = 1;
+	fc_host_supported_fc4s(lport->host)[7] = 1;
+
+	/* This value is also unchanging */
+	memset(fc_host_active_fc4s(lport->host), 0,
+	       sizeof(fc_host_active_fc4s(lport->host)));
+	fc_host_active_fc4s(lport->host)[2] = 1;
+	fc_host_active_fc4s(lport->host)[7] = 1;
+	fc_host_maxframe_size(lport->host) = lport->mfs;
+	fc_host_supported_speeds(lport->host) = 0;
+	if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
+	if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
+
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_init);