Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2200 insertions, 0 deletions

diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
new file mode 100644
index 000000000..ab06e9aeb
--- /dev/null
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -0,0 +1,2200 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright(c) 2007 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ *
+ * HIERARCHY
+ *
+ * The following hierarchy 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 hierarchy-
+ *
+ * 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 because 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, successful 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 <linux/delay.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+
+#include <scsi/fc/fc_gs.h>
+
+#include <scsi/libfc.h>
+#include <linux/scatterlist.h>
+
+#include "fc_encode.h"
+#include "fc_libfc.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)*/
+#define	MAX_CT_PAYLOAD		2048
+#define	DISCOVERED_PORTS	4
+#define	NUMBER_OF_PORTS		1
+
+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_ns(struct fc_lport *, enum fc_lport_state);
+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 void fc_lport_enter_fdmi(struct fc_lport *lport);
+static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state);
+
+static const char *fc_lport_state_names[] = {
+	[LPORT_ST_DISABLED] = "disabled",
+	[LPORT_ST_FLOGI] =    "FLOGI",
+	[LPORT_ST_DNS] =      "dNS",
+	[LPORT_ST_RNN_ID] =   "RNN_ID",
+	[LPORT_ST_RSNN_NN] =  "RSNN_NN",
+	[LPORT_ST_RSPN_ID] =  "RSPN_ID",
+	[LPORT_ST_RFT_ID] =   "RFT_ID",
+	[LPORT_ST_RFF_ID] =   "RFF_ID",
+	[LPORT_ST_FDMI] =     "FDMI",
+	[LPORT_ST_RHBA] =     "RHBA",
+	[LPORT_ST_RPA] =      "RPA",
+	[LPORT_ST_DHBA] =     "DHBA",
+	[LPORT_ST_DPRT] =     "DPRT",
+	[LPORT_ST_SCR] =      "SCR",
+	[LPORT_ST_READY] =    "Ready",
+	[LPORT_ST_LOGO] =     "LOGO",
+	[LPORT_ST_RESET] =    "reset",
+};
+
+/**
+ * struct fc_bsg_info - FC Passthrough managemet structure
+ * @job:      The passthrough job
+ * @lport:    The local port to pass through a command
+ * @rsp_code: The expected response code
+ * @sg:	      job->reply_payload.sg_list
+ * @nents:    job->reply_payload.sg_cnt
+ * @offset:   The offset into the response data
+ */
+struct fc_bsg_info {
+	struct bsg_job *job;
+	struct fc_lport *lport;
+	u16 rsp_code;
+	struct scatterlist *sg;
+	u32 nents;
+	size_t offset;
+};
+
+/**
+ * fc_frame_drop() - Dummy frame handler
+ * @lport: The local port the frame was received on
+ * @fp:	   The received frame
+ */
+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
+ * @rdata: private remote port data
+ * @event: The event that occurred
+ *
+ * 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_priv *rdata,
+				    enum fc_rport_event event)
+{
+	FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
+		     rdata->ids.port_id);
+
+	mutex_lock(&lport->lp_mutex);
+	switch (event) {
+	case RPORT_EV_READY:
+		if (lport->state == LPORT_ST_DNS) {
+			lport->dns_rdata = rdata;
+			fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
+		} else if (lport->state == LPORT_ST_FDMI) {
+			lport->ms_rdata = rdata;
+			fc_lport_enter_ms(lport, LPORT_ST_DHBA);
+		} else {
+			FC_LPORT_DBG(lport, "Received an READY event "
+				     "on port (%6.6x) for the directory "
+				     "server, but the lport is not "
+				     "in the DNS or FDMI state, it's in the "
+				     "%d state", rdata->ids.port_id,
+				     lport->state);
+			fc_rport_logoff(rdata);
+		}
+		break;
+	case RPORT_EV_LOGO:
+	case RPORT_EV_FAILED:
+	case RPORT_EV_STOP:
+		if (rdata->ids.port_id == FC_FID_DIR_SERV)
+			lport->dns_rdata = NULL;
+		else if (rdata->ids.port_id == FC_FID_MGMT_SERV)
+			lport->ms_rdata = NULL;
+		break;
+	case RPORT_EV_NONE:
+		break;
+	}
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * 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
+ * @remote_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)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	if (lport->ptp_rdata) {
+		fc_rport_logoff(lport->ptp_rdata);
+		kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
+	}
+	mutex_lock(&lport->disc.disc_mutex);
+	lport->ptp_rdata = fc_rport_create(lport, remote_fid);
+	if (!lport->ptp_rdata) {
+		printk(KERN_WARNING "libfc: Failed to setup lport 0x%x\n",
+			lport->port_id);
+		mutex_unlock(&lport->disc.disc_mutex);
+		return;
+	}
+	kref_get(&lport->ptp_rdata->kref);
+	lport->ptp_rdata->ids.port_name = remote_wwpn;
+	lport->ptp_rdata->ids.node_name = remote_wwnn;
+	mutex_unlock(&lport->disc.disc_mutex);
+
+	fc_rport_login(lport->ptp_rdata);
+
+	fc_lport_enter_ready(lport);
+}
+
+/**
+ * fc_get_host_port_state() - Return the port state of the given Scsi_Host
+ * @shost:  The SCSI host whose port state is to be determined
+ */
+void fc_get_host_port_state(struct Scsi_Host *shost)
+{
+	struct fc_lport *lport = shost_priv(shost);
+
+	mutex_lock(&lport->lp_mutex);
+	if (!lport->link_up)
+		fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
+	else
+		switch (lport->state) {
+		case LPORT_ST_READY:
+			fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
+			break;
+		default:
+			fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
+		}
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_get_host_port_state);
+
+/**
+ * fc_get_host_speed() - Return the speed of the given Scsi_Host
+ * @shost: The SCSI host whose port speed is to be determined
+ */
+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);
+
+/**
+ * fc_get_host_stats() - Return the Scsi_Host's statistics
+ * @shost: The SCSI host whose statistics are to be returned
+ */
+struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
+{
+	struct fc_host_statistics *fc_stats;
+	struct fc_lport *lport = shost_priv(shost);
+	unsigned int cpu;
+	u64 fcp_in_bytes = 0;
+	u64 fcp_out_bytes = 0;
+
+	fc_stats = &lport->host_stats;
+	memset(fc_stats, 0, sizeof(struct fc_host_statistics));
+
+	fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ;
+
+	for_each_possible_cpu(cpu) {
+		struct fc_stats *stats;
+
+		stats = per_cpu_ptr(lport->stats, cpu);
+
+		fc_stats->tx_frames += READ_ONCE(stats->TxFrames);
+		fc_stats->tx_words += READ_ONCE(stats->TxWords);
+		fc_stats->rx_frames += READ_ONCE(stats->RxFrames);
+		fc_stats->rx_words += READ_ONCE(stats->RxWords);
+		fc_stats->error_frames += READ_ONCE(stats->ErrorFrames);
+		fc_stats->invalid_crc_count += READ_ONCE(stats->InvalidCRCCount);
+		fc_stats->fcp_input_requests += READ_ONCE(stats->InputRequests);
+		fc_stats->fcp_output_requests += READ_ONCE(stats->OutputRequests);
+		fc_stats->fcp_control_requests += READ_ONCE(stats->ControlRequests);
+		fcp_in_bytes += READ_ONCE(stats->InputBytes);
+		fcp_out_bytes += READ_ONCE(stats->OutputBytes);
+		fc_stats->fcp_packet_alloc_failures += READ_ONCE(stats->FcpPktAllocFails);
+		fc_stats->fcp_packet_aborts += READ_ONCE(stats->FcpPktAborts);
+		fc_stats->fcp_frame_alloc_failures += READ_ONCE(stats->FcpFrameAllocFails);
+		fc_stats->link_failure_count += READ_ONCE(stats->LinkFailureCount);
+	}
+	fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
+	fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
+	fc_stats->lip_count = -1;
+	fc_stats->nos_count = -1;
+	fc_stats->loss_of_sync_count = -1;
+	fc_stats->loss_of_signal_count = -1;
+	fc_stats->prim_seq_protocol_err_count = -1;
+	fc_stats->dumped_frames = -1;
+
+	/* update exches stats */
+	fc_exch_update_stats(lport);
+
+	return fc_stats;
+}
+EXPORT_SYMBOL(fc_get_host_stats);
+
+/**
+ * fc_lport_flogi_fill() - Fill in FLOGI command for request
+ * @lport: The local port the FLOGI is for
+ * @flogi: The FLOGI command
+ * @op:	   The opcode
+ */
+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;
+	}
+}
+
+/**
+ * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
+ * @lport: The local port to add a new FC-4 type to
+ * @type:  The new 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 receiving the RLIR
+ * @fp:	   The RLIR request frame
+ */
+static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
+		     fc_lport_state(lport));
+
+	fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
+	fc_frame_free(fp);
+}
+
+/**
+ * fc_lport_recv_echo_req() - Handle received ECHO request
+ * @lport: The local port receiving the ECHO
+ * @in_fp: ECHO request frame
+ */
+static void fc_lport_recv_echo_req(struct fc_lport *lport,
+				   struct fc_frame *in_fp)
+{
+	struct fc_frame *fp;
+	unsigned int len;
+	void *pp;
+	void *dp;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Received ECHO 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);
+		*((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
+		fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
+		lport->tt.frame_send(lport, fp);
+	}
+	fc_frame_free(in_fp);
+}
+
+/**
+ * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
+ * @lport: The local port receiving the RNID
+ * @in_fp: The RNID request frame
+ */
+static void fc_lport_recv_rnid_req(struct fc_lport *lport,
+				   struct fc_frame *in_fp)
+{
+	struct fc_frame *fp;
+	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;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(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.reason = ELS_RJT_LOGIC;
+		rjt_data.explan = ELS_EXPL_NONE;
+		fc_seq_els_rsp_send(in_fp, 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));
+			}
+			fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
+			lport->tt.frame_send(lport, fp);
+		}
+	}
+	fc_frame_free(in_fp);
+}
+
+/**
+ * fc_lport_recv_logo_req() - Handle received fabric LOGO request
+ * @lport: The local port receiving the LOGO
+ * @fp:	   The LOGO request frame
+ */
+static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
+	fc_lport_enter_reset(lport);
+	fc_frame_free(fp);
+}
+
+/**
+ * fc_fabric_login() - Start the lport state machine
+ * @lport: The local port 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_DISABLED ||
+	    lport->state == LPORT_ST_LOGO) {
+		fc_lport_state_enter(lport, LPORT_ST_RESET);
+		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)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	if (!lport->link_up) {
+		lport->link_up = 1;
+
+		if (lport->state == LPORT_ST_RESET)
+			fc_lport_enter_flogi(lport);
+	}
+}
+
+/**
+ * fc_linkup() - Handler for transport linkup events
+ * @lport: The local port whose link is up
+ */
+void fc_linkup(struct fc_lport *lport)
+{
+	printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
+	       lport->host->host_no, lport->port_id);
+
+	mutex_lock(&lport->lp_mutex);
+	__fc_linkup(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)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	if (lport->link_up) {
+		lport->link_up = 0;
+		fc_lport_enter_reset(lport);
+		lport->tt.fcp_cleanup(lport);
+	}
+}
+
+/**
+ * fc_linkdown() - Handler for transport linkdown events
+ * @lport: The local port whose link is down
+ */
+void fc_linkdown(struct fc_lport *lport)
+{
+	printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
+	       lport->host->host_no, lport->port_id);
+
+	mutex_lock(&lport->lp_mutex);
+	__fc_linkdown(lport);
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_linkdown);
+
+/**
+ * fc_fabric_logoff() - Logout of the fabric
+ * @lport: The local port 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);
+	if (lport->dns_rdata)
+		fc_rport_logoff(lport->dns_rdata);
+	mutex_unlock(&lport->lp_mutex);
+	fc_rport_flush_queue();
+	mutex_lock(&lport->lp_mutex);
+	fc_lport_enter_logo(lport);
+	mutex_unlock(&lport->lp_mutex);
+	cancel_delayed_work_sync(&lport->retry_work);
+	return 0;
+}
+EXPORT_SYMBOL(fc_fabric_logoff);
+
+/**
+ * fc_lport_destroy() - Unregister a fc_lport
+ * @lport: The local port to unregister
+ *
+ * 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)
+{
+	mutex_lock(&lport->lp_mutex);
+	lport->state = LPORT_ST_DISABLED;
+	lport->link_up = 0;
+	lport->tt.frame_send = fc_frame_drop;
+	mutex_unlock(&lport->lp_mutex);
+
+	lport->tt.fcp_abort_io(lport);
+	lport->tt.disc_stop_final(lport);
+	lport->tt.exch_mgr_reset(lport, 0, 0);
+	cancel_delayed_work_sync(&lport->retry_work);
+	fc_fc4_del_lport(lport);
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_destroy);
+
+/**
+ * fc_set_mfs() - Set the maximum frame size for a local port
+ * @lport: The local port to set the MFS for
+ * @mfs:   The new MFS
+ */
+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: The local port receiving the event
+ * @event: The discovery event
+ */
+static void fc_lport_disc_callback(struct fc_lport *lport,
+				   enum fc_disc_event event)
+{
+	switch (event) {
+	case DISC_EV_SUCCESS:
+		FC_LPORT_DBG(lport, "Discovery succeeded\n");
+		break;
+	case DISC_EV_FAILED:
+		printk(KERN_ERR "host%d: libfc: "
+		       "Discovery failed for port (%6.6x)\n",
+		       lport->host->host_no, lport->port_id);
+		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_lport_enter_ready() - Enter the ready state and start discovery
+ * @lport: The local port that is ready
+ */
+static void fc_lport_enter_ready(struct fc_lport *lport)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered READY from state %s\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_READY);
+	if (lport->vport)
+		fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
+	fc_vports_linkchange(lport);
+
+	if (!lport->ptp_rdata)
+		lport->tt.disc_start(fc_lport_disc_callback, lport);
+}
+
+/**
+ * fc_lport_set_port_id() - set the local port Port ID
+ * @lport: The local port which will have its Port ID set.
+ * @port_id: The new port ID.
+ * @fp: The frame containing the incoming request, or NULL.
+ */
+static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
+				 struct fc_frame *fp)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	if (port_id)
+		printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
+		       lport->host->host_no, port_id);
+
+	lport->port_id = port_id;
+
+	/* Update the fc_host */
+	fc_host_port_id(lport->host) = port_id;
+
+	if (lport->tt.lport_set_port_id)
+		lport->tt.lport_set_port_id(lport, port_id, fp);
+}
+
+/**
+ * fc_lport_set_local_id() - set the local port Port ID for point-to-multipoint
+ * @lport: The local port which will have its Port ID set.
+ * @port_id: The new port ID.
+ *
+ * Called by the lower-level driver when transport sets the local port_id.
+ * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
+ * discovery to be skipped.
+ */
+void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
+{
+	mutex_lock(&lport->lp_mutex);
+
+	fc_lport_set_port_id(lport, port_id, NULL);
+
+	switch (lport->state) {
+	case LPORT_ST_RESET:
+	case LPORT_ST_FLOGI:
+		if (port_id)
+			fc_lport_enter_ready(lport);
+		break;
+	default:
+		break;
+	}
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_lport_set_local_id);
+
+/**
+ * fc_lport_recv_flogi_req() - Receive a FLOGI request
+ * @lport: The local port that received the request
+ * @rx_fp: The FLOGI frame
+ *
+ * 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.
+ */
+static void fc_lport_recv_flogi_req(struct fc_lport *lport,
+				    struct fc_frame *rx_fp)
+{
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	struct fc_els_flogi *flp;
+	struct fc_els_flogi *new_flp;
+	u64 remote_wwpn;
+	u32 remote_fid;
+	u32 local_fid;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
+		     fc_lport_state(lport));
+
+	remote_fid = fc_frame_sid(rx_fp);
+	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) {
+		printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
+		       "with same WWPN %16.16llx\n",
+		       lport->host->host_no, remote_wwpn);
+		goto out;
+	}
+	FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\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_lport_set_port_id(lport, local_fid, rx_fp);
+
+	fp = fc_frame_alloc(lport, sizeof(*flp));
+	if (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.
+		 */
+		fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+		fh = fc_frame_header_get(fp);
+		hton24(fh->fh_s_id, local_fid);
+		hton24(fh->fh_d_id, remote_fid);
+		lport->tt.frame_send(lport, fp);
+
+	} else {
+		fc_lport_error(lport, fp);
+	}
+	fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
+			   get_unaligned_be64(&flp->fl_wwnn));
+out:
+	fc_frame_free(rx_fp);
+}
+
+/**
+ * fc_lport_recv_els_req() - The generic lport ELS request handler
+ * @lport: The local port that received the request
+ * @fp:	   The request frame
+ *
+ * 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 because it will grab the lock.
+ */
+static void fc_lport_recv_els_req(struct fc_lport *lport,
+				  struct fc_frame *fp)
+{
+	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 (!lport->link_up)
+		fc_frame_free(fp);
+	else {
+		/*
+		 * Check opcode.
+		 */
+		switch (fc_frame_payload_op(fp)) {
+		case ELS_FLOGI:
+			if (!lport->point_to_multipoint)
+				fc_lport_recv_flogi_req(lport, fp);
+			else
+				fc_rport_recv_req(lport, fp);
+			break;
+		case ELS_LOGO:
+			if (fc_frame_sid(fp) == FC_FID_FLOGI)
+				fc_lport_recv_logo_req(lport, fp);
+			else
+				fc_rport_recv_req(lport, fp);
+			break;
+		case ELS_RSCN:
+			lport->tt.disc_recv_req(lport, fp);
+			break;
+		case ELS_ECHO:
+			fc_lport_recv_echo_req(lport, fp);
+			break;
+		case ELS_RLIR:
+			fc_lport_recv_rlir_req(lport, fp);
+			break;
+		case ELS_RNID:
+			fc_lport_recv_rnid_req(lport, fp);
+			break;
+		default:
+			fc_rport_recv_req(lport, fp);
+			break;
+		}
+	}
+	mutex_unlock(&lport->lp_mutex);
+}
+
+static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
+			     const struct fc_els_spp *spp_in,
+			     struct fc_els_spp *spp_out)
+{
+	return FC_SPP_RESP_INVL;
+}
+
+struct fc4_prov fc_lport_els_prov = {
+	.prli = fc_lport_els_prli,
+	.recv = fc_lport_recv_els_req,
+};
+
+/**
+ * fc_lport_recv() - The generic lport request handler
+ * @lport: The lport that received the request
+ * @fp: The frame the request is in
+ *
+ * Locking Note: This function should not be called with the lport
+ *		 lock held because it may grab the lock.
+ */
+void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp)
+{
+	struct fc_frame_header *fh = fc_frame_header_get(fp);
+	struct fc_seq *sp = fr_seq(fp);
+	struct fc4_prov *prov;
+
+	/*
+	 * Use RCU read lock and module_lock to be sure module doesn't
+	 * deregister and get unloaded while we're calling it.
+	 * try_module_get() is inlined and accepts a NULL parameter.
+	 * Only ELSes and FCP target ops should come through here.
+	 * The locking is unfortunate, and a better scheme is being sought.
+	 */
+
+	rcu_read_lock();
+	if (fh->fh_type >= FC_FC4_PROV_SIZE)
+		goto drop;
+	prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
+	if (!prov || !try_module_get(prov->module))
+		goto drop;
+	rcu_read_unlock();
+	prov->recv(lport, fp);
+	module_put(prov->module);
+	return;
+drop:
+	rcu_read_unlock();
+	FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
+	fc_frame_free(fp);
+	if (sp)
+		fc_exch_done(sp);
+}
+EXPORT_SYMBOL(fc_lport_recv);
+
+/**
+ * fc_lport_reset() - Reset a local port
+ * @lport: The local port 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)
+{
+	cancel_delayed_work_sync(&lport->retry_work);
+	mutex_lock(&lport->lp_mutex);
+	fc_lport_enter_reset(lport);
+	mutex_unlock(&lport->lp_mutex);
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_reset);
+
+/**
+ * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
+ * @lport: The local port to be reset
+ */
+static void fc_lport_reset_locked(struct fc_lport *lport)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	if (lport->dns_rdata) {
+		fc_rport_logoff(lport->dns_rdata);
+		lport->dns_rdata = NULL;
+	}
+
+	if (lport->ptp_rdata) {
+		fc_rport_logoff(lport->ptp_rdata);
+		kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
+		lport->ptp_rdata = NULL;
+	}
+
+	lport->tt.disc_stop(lport);
+
+	lport->tt.exch_mgr_reset(lport, 0, 0);
+	fc_host_fabric_name(lport->host) = 0;
+
+	if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
+		fc_lport_set_port_id(lport, 0, NULL);
+}
+
+/**
+ * fc_lport_enter_reset() - Reset the local port
+ * @lport: The local port to be reset
+ */
+static void fc_lport_enter_reset(struct fc_lport *lport)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
+		     fc_lport_state(lport));
+
+	if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
+		return;
+
+	if (lport->vport) {
+		if (lport->link_up)
+			fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
+		else
+			fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
+	}
+	fc_lport_state_enter(lport, LPORT_ST_RESET);
+	fc_host_post_event(lport->host, fc_get_event_number(),
+			   FCH_EVT_LIPRESET, 0);
+	fc_vports_linkchange(lport);
+	fc_lport_reset_locked(lport);
+	if (lport->link_up)
+		fc_lport_enter_flogi(lport);
+}
+
+/**
+ * fc_lport_enter_disabled() - Disable the local port
+ * @lport: The local port to be reset
+ */
+static void fc_lport_enter_disabled(struct fc_lport *lport)
+{
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_DISABLED);
+	fc_vports_linkchange(lport);
+	fc_lport_reset_locked(lport);
+}
+
+/**
+ * fc_lport_error() - Handler for any errors
+ * @lport: The local port that the error was on
+ * @fp:	   The error code encoded in a 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_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
+		     IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport),
+		     lport->retry_count);
+
+	if (PTR_ERR(fp) == -FC_EX_CLOSED)
+		return;
+
+	/*
+	 * Memory allocation failure, or the exchange timed out
+	 * or we received LS_RJT.
+	 * 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
+		fc_lport_enter_reset(lport);
+}
+
+/**
+ * fc_lport_ns_resp() - Handle response to a name server
+ *			registration exchange
+ * @sp:	    current sequence in 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_ns_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;
+
+	FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
+		FC_LPORT_DBG(lport, "Received a name server response, "
+			     "but in state %s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		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)
+		switch (lport->state) {
+		case LPORT_ST_RNN_ID:
+			fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
+			break;
+		case LPORT_ST_RSNN_NN:
+			fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
+			break;
+		case LPORT_ST_RSPN_ID:
+			fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
+			break;
+		case LPORT_ST_RFT_ID:
+			fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
+			break;
+		case LPORT_ST_RFF_ID:
+			if (lport->fdmi_enabled)
+				fc_lport_enter_fdmi(lport);
+			else
+				fc_lport_enter_scr(lport);
+			break;
+		default:
+			/* should have already been caught by state checks */
+			break;
+		}
+	else
+		fc_lport_error(lport, fp);
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_ms_resp() - Handle response to a management server
+ *			exchange
+ * @sp:	    current sequence in 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_ms_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;
+	struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
+	FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) {
+		FC_LPORT_DBG(lport, "Received a management server response, "
+			     "but in state %s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		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_MGMT &&
+	    ct->ct_fs_subtype == FC_FDMI_SUBTYPE) {
+		FC_LPORT_DBG(lport, "Received a management server response, "
+				    "reason=%d explain=%d\n",
+				    ct->ct_reason,
+				    ct->ct_explan);
+
+		switch (lport->state) {
+		case LPORT_ST_RHBA:
+			if ((ntohs(ct->ct_cmd) == FC_FS_RJT) && fc_host->fdmi_version == FDMI_V2) {
+				FC_LPORT_DBG(lport, "Error for FDMI-V2, fall back to FDMI-V1\n");
+				fc_host->fdmi_version = FDMI_V1;
+
+				fc_lport_enter_ms(lport, LPORT_ST_RHBA);
+
+			} else if (ntohs(ct->ct_cmd) == FC_FS_ACC)
+				fc_lport_enter_ms(lport, LPORT_ST_RPA);
+			else /* Error Skip RPA */
+				fc_lport_enter_scr(lport);
+			break;
+		case LPORT_ST_RPA:
+			fc_lport_enter_scr(lport);
+			break;
+		case LPORT_ST_DPRT:
+			fc_lport_enter_ms(lport, LPORT_ST_RHBA);
+			break;
+		case LPORT_ST_DHBA:
+			fc_lport_enter_ms(lport, LPORT_ST_DPRT);
+			break;
+		default:
+			/* should have already been caught by state checks */
+			break;
+		}
+	} else {
+		/* Invalid Frame? */
+		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;
+
+	FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_SCR) {
+		FC_LPORT_DBG(lport, "Received a SCR response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		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 SCR (State Change Register) request
+ * @lport: The local port to register for state changes
+ */
+static void fc_lport_enter_scr(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
+		     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, FC_FID_FCTRL, fp, ELS_SCR,
+				  fc_lport_scr_resp, lport,
+				  2 * lport->r_a_tov))
+		fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_enter_ns() - register some object with the name server
+ * @lport: Fibre Channel local port to register
+ * @state: Local port state
+ */
+static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
+{
+	struct fc_frame *fp;
+	enum fc_ns_req cmd;
+	int size = sizeof(struct fc_ct_hdr);
+	size_t len;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
+		     fc_lport_state_names[state],
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, state);
+
+	switch (state) {
+	case LPORT_ST_RNN_ID:
+		cmd = FC_NS_RNN_ID;
+		size += sizeof(struct fc_ns_rn_id);
+		break;
+	case LPORT_ST_RSNN_NN:
+		len = strnlen(fc_host_symbolic_name(lport->host), 255);
+		/* if there is no symbolic name, skip to RFT_ID */
+		if (!len)
+			return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
+		cmd = FC_NS_RSNN_NN;
+		size += sizeof(struct fc_ns_rsnn) + len;
+		break;
+	case LPORT_ST_RSPN_ID:
+		len = strnlen(fc_host_symbolic_name(lport->host), 255);
+		/* if there is no symbolic name, skip to RFT_ID */
+		if (!len)
+			return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
+		cmd = FC_NS_RSPN_ID;
+		size += sizeof(struct fc_ns_rspn) + len;
+		break;
+	case LPORT_ST_RFT_ID:
+		cmd = FC_NS_RFT_ID;
+		size += sizeof(struct fc_ns_rft);
+		break;
+	case LPORT_ST_RFF_ID:
+		cmd = FC_NS_RFF_ID;
+		size += sizeof(struct fc_ns_rff_id);
+		break;
+	default:
+		fc_lport_error(lport, NULL);
+		return;
+	}
+
+	fp = fc_frame_alloc(lport, size);
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
+				  fc_lport_ns_resp,
+				  lport, 3 * lport->r_a_tov))
+		fc_lport_error(lport, fp);
+}
+
+static struct fc_rport_operations fc_lport_rport_ops = {
+	.event_callback = fc_lport_rport_callback,
+};
+
+/**
+ * fc_lport_enter_dns() - Create a fc_rport for the name server
+ * @lport: The local port requesting a remote port for the name server
+ */
+static void fc_lport_enter_dns(struct fc_lport *lport)
+{
+	struct fc_rport_priv *rdata;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_DNS);
+
+	mutex_lock(&lport->disc.disc_mutex);
+	rdata = fc_rport_create(lport, FC_FID_DIR_SERV);
+	mutex_unlock(&lport->disc.disc_mutex);
+	if (!rdata)
+		goto err;
+
+	rdata->ops = &fc_lport_rport_ops;
+	fc_rport_login(rdata);
+	return;
+
+err:
+	fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_enter_ms() - management server commands
+ * @lport: Fibre Channel local port to register
+ * @state: Local port state
+ */
+static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state)
+{
+	struct fc_frame *fp;
+	enum fc_fdmi_req cmd;
+	int size = sizeof(struct fc_ct_hdr);
+	size_t len;
+	int numattrs;
+	struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
+		     fc_lport_state_names[state],
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, state);
+
+	switch (state) {
+	case LPORT_ST_RHBA:
+		cmd = FC_FDMI_RHBA;
+		/* Number of HBA Attributes */
+		numattrs = 11;
+		len = sizeof(struct fc_fdmi_rhba);
+		len -= sizeof(struct fc_fdmi_attr_entry);
+
+		len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
+		len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
+		len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
+		len += FC_FDMI_HBA_ATTR_MODEL_LEN;
+		len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
+		len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
+		len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
+		len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
+		len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
+		len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
+		len += FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN;
+
+
+		if (fc_host->fdmi_version == FDMI_V2) {
+			numattrs += 7;
+			len += FC_FDMI_HBA_ATTR_NODESYMBLNAME_LEN;
+			len += FC_FDMI_HBA_ATTR_VENDORSPECIFICINFO_LEN;
+			len += FC_FDMI_HBA_ATTR_NUMBEROFPORTS_LEN;
+			len += FC_FDMI_HBA_ATTR_FABRICNAME_LEN;
+			len += FC_FDMI_HBA_ATTR_BIOSVERSION_LEN;
+			len += FC_FDMI_HBA_ATTR_BIOSSTATE_LEN;
+			len += FC_FDMI_HBA_ATTR_VENDORIDENTIFIER_LEN;
+		}
+
+		len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
+
+		size += len;
+		break;
+	case LPORT_ST_RPA:
+		cmd = FC_FDMI_RPA;
+		/* Number of Port Attributes */
+		numattrs = 6;
+		len = sizeof(struct fc_fdmi_rpa);
+		len -= sizeof(struct fc_fdmi_attr_entry);
+		len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
+		len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
+		len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
+		len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
+		len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
+		len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
+
+		if (fc_host->fdmi_version == FDMI_V2) {
+			numattrs += 10;
+			len += FC_FDMI_PORT_ATTR_NODENAME_LEN;
+			len += FC_FDMI_PORT_ATTR_PORTNAME_LEN;
+			len += FC_FDMI_PORT_ATTR_SYMBOLICNAME_LEN;
+			len += FC_FDMI_PORT_ATTR_PORTTYPE_LEN;
+			len += FC_FDMI_PORT_ATTR_SUPPORTEDCLASSSRVC_LEN;
+			len += FC_FDMI_PORT_ATTR_FABRICNAME_LEN;
+			len += FC_FDMI_PORT_ATTR_CURRENTFC4TYPE_LEN;
+			len += FC_FDMI_PORT_ATTR_PORTSTATE_LEN;
+			len += FC_FDMI_PORT_ATTR_DISCOVEREDPORTS_LEN;
+			len += FC_FDMI_PORT_ATTR_PORTID_LEN;
+		}
+
+		len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
+
+		size += len;
+		break;
+	case LPORT_ST_DPRT:
+		cmd = FC_FDMI_DPRT;
+		len = sizeof(struct fc_fdmi_dprt);
+		size += len;
+		break;
+	case LPORT_ST_DHBA:
+		cmd = FC_FDMI_DHBA;
+		len = sizeof(struct fc_fdmi_dhba);
+		size += len;
+		break;
+	default:
+		fc_lport_error(lport, NULL);
+		return;
+	}
+
+	FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n",
+			     cmd, (int)len, size);
+	fp = fc_frame_alloc(lport, size);
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd,
+				  fc_lport_ms_resp,
+				  lport, 3 * lport->r_a_tov))
+		fc_lport_error(lport, fp);
+}
+
+/**
+ * fc_lport_enter_fdmi() - Create a fc_rport for the management server
+ * @lport: The local port requesting a remote port for the management server
+ */
+static void fc_lport_enter_fdmi(struct fc_lport *lport)
+{
+	struct fc_rport_priv *rdata;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_FDMI);
+
+	mutex_lock(&lport->disc.disc_mutex);
+	rdata = fc_rport_create(lport, FC_FID_MGMT_SERV);
+	mutex_unlock(&lport->disc.disc_mutex);
+	if (!rdata)
+		goto err;
+
+	rdata->ops = &fc_lport_rport_ops;
+	fc_rport_login(rdata);
+	return;
+
+err:
+	fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_timeout() - Handler for the retry_work timer
+ * @work: The work struct of the local port
+ */
+static void fc_lport_timeout(struct work_struct *work)
+{
+	struct fc_lport *lport =
+		container_of(work, struct fc_lport,
+			     retry_work.work);
+	struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
+
+	mutex_lock(&lport->lp_mutex);
+
+	switch (lport->state) {
+	case LPORT_ST_DISABLED:
+		break;
+	case LPORT_ST_READY:
+		break;
+	case LPORT_ST_RESET:
+		break;
+	case LPORT_ST_FLOGI:
+		fc_lport_enter_flogi(lport);
+		break;
+	case LPORT_ST_DNS:
+		fc_lport_enter_dns(lport);
+		break;
+	case LPORT_ST_RNN_ID:
+	case LPORT_ST_RSNN_NN:
+	case LPORT_ST_RSPN_ID:
+	case LPORT_ST_RFT_ID:
+	case LPORT_ST_RFF_ID:
+		fc_lport_enter_ns(lport, lport->state);
+		break;
+	case LPORT_ST_FDMI:
+		fc_lport_enter_fdmi(lport);
+		break;
+	case LPORT_ST_RHBA:
+		if (fc_host->fdmi_version == FDMI_V2) {
+			FC_LPORT_DBG(lport, "timeout for FDMI-V2 RHBA,fall back to FDMI-V1\n");
+			fc_host->fdmi_version = FDMI_V1;
+			fc_lport_enter_ms(lport, LPORT_ST_RHBA);
+			break;
+		}
+		fallthrough;
+	case LPORT_ST_RPA:
+	case LPORT_ST_DHBA:
+	case LPORT_ST_DPRT:
+		FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n",
+			     fc_lport_state(lport));
+		fallthrough;
+	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:	    The sequence that the LOGO was on
+ * @fp:	    The LOGO frame
+ * @lp_arg: The lport port that received 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.
+ */
+void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
+			void *lp_arg)
+{
+	struct fc_lport *lport = lp_arg;
+	u8 op;
+
+	FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_LOGO) {
+		FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		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_disabled(lport);
+	else
+		fc_lport_error(lport, fp);
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_lport_logo_resp);
+
+/**
+ * fc_lport_enter_logo() - Logout of the fabric
+ * @lport: The local port to be logged out
+ */
+static void fc_lport_enter_logo(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+	struct fc_els_logo *logo;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_LOGO);
+	fc_vports_linkchange(lport);
+
+	fp = fc_frame_alloc(lport, sizeof(*logo));
+	if (!fp) {
+		fc_lport_error(lport, fp);
+		return;
+	}
+
+	if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
+				  fc_lport_logo_resp, lport,
+				  2 * lport->r_a_tov))
+		fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_flogi_resp() - Handle response to FLOGI request
+ * @sp:	    The sequence that the FLOGI was on
+ * @fp:	    The FLOGI response frame
+ * @lp_arg: The lport port that received the FLOGI response
+ *
+ * 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.
+ */
+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;
+
+	FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
+
+	if (fp == ERR_PTR(-FC_EX_CLOSED))
+		return;
+
+	mutex_lock(&lport->lp_mutex);
+
+	if (lport->state != LPORT_ST_FLOGI) {
+		FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
+			     "%s\n", fc_lport_state(lport));
+		if (IS_ERR(fp))
+			goto err;
+		goto out;
+	}
+
+	if (IS_ERR(fp)) {
+		fc_lport_error(lport, fp);
+		goto err;
+	}
+
+	fh = fc_frame_header_get(fp);
+	did = fc_frame_did(fp);
+	if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 ||
+	    fc_frame_payload_op(fp) != ELS_LS_ACC) {
+		FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n");
+		fc_lport_error(lport, fp);
+		goto out;
+	}
+
+	flp = fc_frame_payload_get(fp, sizeof(*flp));
+	if (!flp) {
+		FC_LPORT_DBG(lport, "FLOGI bad response\n");
+		fc_lport_error(lport, fp);
+		goto out;
+	}
+
+	mfs = ntohs(flp->fl_csp.sp_bb_data) &
+		FC_SP_BB_DATA_MASK;
+
+	if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) {
+		FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
+			     "lport->mfs:%u\n", mfs, lport->mfs);
+		fc_lport_error(lport, fp);
+		goto out;
+	}
+
+	if (mfs <= lport->mfs) {
+		lport->mfs = mfs;
+		fc_host_maxframe_size(lport->host) = 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;
+
+	lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
+
+	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 * lport->e_d_tov;
+		fc_lport_set_port_id(lport, did, fp);
+		printk(KERN_INFO "host%d: libfc: "
+		       "Port (%6.6x) entered "
+		       "point-to-point mode\n",
+		       lport->host->host_no, did);
+		fc_lport_ptp_setup(lport, fc_frame_sid(fp),
+				   get_unaligned_be64(
+					   &flp->fl_wwpn),
+				   get_unaligned_be64(
+					   &flp->fl_wwnn));
+	} else {
+		if (e_d_tov > lport->e_d_tov)
+			lport->e_d_tov = e_d_tov;
+		if (r_a_tov > lport->r_a_tov)
+			lport->r_a_tov = r_a_tov;
+		fc_host_fabric_name(lport->host) =
+			get_unaligned_be64(&flp->fl_wwnn);
+		fc_lport_set_port_id(lport, did, fp);
+		fc_lport_enter_dns(lport);
+	}
+
+out:
+	fc_frame_free(fp);
+err:
+	mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_lport_flogi_resp);
+
+/**
+ * fc_lport_enter_flogi() - Send a FLOGI request to the fabric manager
+ * @lport: Fibre Channel local port to be logged in to the fabric
+ */
+static void fc_lport_enter_flogi(struct fc_lport *lport)
+{
+	struct fc_frame *fp;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
+		     fc_lport_state(lport));
+
+	fc_lport_state_enter(lport, LPORT_ST_FLOGI);
+
+	if (lport->point_to_multipoint) {
+		if (lport->port_id)
+			fc_lport_enter_ready(lport);
+		return;
+	}
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
+	if (!fp)
+		return fc_lport_error(lport, fp);
+
+	if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
+				  lport->vport ? ELS_FDISC : ELS_FLOGI,
+				  fc_lport_flogi_resp, lport,
+				  lport->vport ? 2 * lport->r_a_tov :
+				  lport->e_d_tov))
+		fc_lport_error(lport, NULL);
+}
+
+/**
+ * fc_lport_config() - Configure a fc_lport
+ * @lport: The local port to be configured
+ */
+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_DISABLED);
+
+	fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
+	fc_lport_add_fc4_type(lport, FC_TYPE_CT);
+	fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
+
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_config);
+
+/**
+ * fc_lport_init() - Initialize the lport layer for a local port
+ * @lport: The local port to initialize the exchange layer for
+ */
+int fc_lport_init(struct fc_lport *lport)
+{
+	struct fc_host_attrs *fc_host;
+
+	fc_host = shost_to_fc_host(lport->host);
+
+	/* Set FDMI version to FDMI-2 specification*/
+	fc_host->fdmi_version = FDMI_V2;
+
+	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;
+	fc_host_num_discovered_ports(lport->host) = 4;
+
+	/* 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;
+	if (lport->link_supported_speeds & FC_PORTSPEED_40GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_40GBIT;
+	if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT;
+	if (lport->link_supported_speeds & FC_PORTSPEED_25GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_25GBIT;
+	if (lport->link_supported_speeds & FC_PORTSPEED_50GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_50GBIT;
+	if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT)
+		fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT;
+
+	fc_fc4_add_lport(lport);
+
+	fc_host_num_discovered_ports(lport->host) = DISCOVERED_PORTS;
+	fc_host_port_state(lport->host) = FC_PORTSTATE_ONLINE;
+	fc_host_max_ct_payload(lport->host) = MAX_CT_PAYLOAD;
+	fc_host_num_ports(lport->host) = NUMBER_OF_PORTS;
+	fc_host_bootbios_state(lport->host) = 0X00000000;
+	snprintf(fc_host_bootbios_version(lport->host),
+		FC_SYMBOLIC_NAME_SIZE, "%s", "Unknown");
+
+	return 0;
+}
+EXPORT_SYMBOL(fc_lport_init);
+
+/**
+ * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
+ * @sp:	      The sequence for the FC Passthrough response
+ * @fp:	      The response frame
+ * @info_arg: The BSG info that the response is for
+ */
+static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
+			      void *info_arg)
+{
+	struct fc_bsg_info *info = info_arg;
+	struct bsg_job *job = info->job;
+	struct fc_bsg_reply *bsg_reply = job->reply;
+	struct fc_lport *lport = info->lport;
+	struct fc_frame_header *fh;
+	size_t len;
+	void *buf;
+
+	if (IS_ERR(fp)) {
+		bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
+			-ECONNABORTED : -ETIMEDOUT;
+		job->reply_len = sizeof(uint32_t);
+		bsg_job_done(job, bsg_reply->result,
+			       bsg_reply->reply_payload_rcv_len);
+		kfree(info);
+		return;
+	}
+
+	mutex_lock(&lport->lp_mutex);
+	fh = fc_frame_header_get(fp);
+	len = fr_len(fp) - sizeof(*fh);
+	buf = fc_frame_payload_get(fp, 0);
+
+	if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
+		/* Get the response code from the first frame payload */
+		unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
+			ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
+			(unsigned short)fc_frame_payload_op(fp);
+
+		/* Save the reply status of the job */
+		bsg_reply->reply_data.ctels_reply.status =
+			(cmd == info->rsp_code) ?
+			FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
+	}
+
+	bsg_reply->reply_payload_rcv_len +=
+		fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
+					 &info->offset, NULL);
+
+	if (fr_eof(fp) == FC_EOF_T &&
+	    (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
+	    (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
+		if (bsg_reply->reply_payload_rcv_len >
+		    job->reply_payload.payload_len)
+			bsg_reply->reply_payload_rcv_len =
+				job->reply_payload.payload_len;
+		bsg_reply->result = 0;
+		bsg_job_done(job, bsg_reply->result,
+			       bsg_reply->reply_payload_rcv_len);
+		kfree(info);
+	}
+	fc_frame_free(fp);
+	mutex_unlock(&lport->lp_mutex);
+}
+
+/**
+ * fc_lport_els_request() - Send ELS passthrough request
+ * @job:   The BSG Passthrough job
+ * @lport: The local port sending the request
+ * @did:   The destination port id
+ * @tov:   The timeout period (in ms)
+ */
+static int fc_lport_els_request(struct bsg_job *job,
+				struct fc_lport *lport,
+				u32 did, u32 tov)
+{
+	struct fc_bsg_info *info;
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	char *pp;
+	int len;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	fp = fc_frame_alloc(lport, job->request_payload.payload_len);
+	if (!fp)
+		return -ENOMEM;
+
+	len = job->request_payload.payload_len;
+	pp = fc_frame_payload_get(fp, len);
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  pp, len);
+
+	fh = fc_frame_header_get(fp);
+	fh->fh_r_ctl = FC_RCTL_ELS_REQ;
+	hton24(fh->fh_d_id, did);
+	hton24(fh->fh_s_id, lport->port_id);
+	fh->fh_type = FC_TYPE_ELS;
+	hton24(fh->fh_f_ctl, FC_FCTL_REQ);
+	fh->fh_cs_ctl = 0;
+	fh->fh_df_ctl = 0;
+	fh->fh_parm_offset = 0;
+
+	info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
+	if (!info) {
+		fc_frame_free(fp);
+		return -ENOMEM;
+	}
+
+	info->job = job;
+	info->lport = lport;
+	info->rsp_code = ELS_LS_ACC;
+	info->nents = job->reply_payload.sg_cnt;
+	info->sg = job->reply_payload.sg_list;
+
+	if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
+			      NULL, info, tov)) {
+		kfree(info);
+		return -ECOMM;
+	}
+	return 0;
+}
+
+/**
+ * fc_lport_ct_request() - Send CT Passthrough request
+ * @job:   The BSG Passthrough job
+ * @lport: The local port sending the request
+ * @did:   The destination FC-ID
+ * @tov:   The timeout period to wait for the response
+ */
+static int fc_lport_ct_request(struct bsg_job *job,
+			       struct fc_lport *lport, u32 did, u32 tov)
+{
+	struct fc_bsg_info *info;
+	struct fc_frame *fp;
+	struct fc_frame_header *fh;
+	struct fc_ct_req *ct;
+	size_t len;
+
+	lockdep_assert_held(&lport->lp_mutex);
+
+	fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+			    job->request_payload.payload_len);
+	if (!fp)
+		return -ENOMEM;
+
+	len = job->request_payload.payload_len;
+	ct = fc_frame_payload_get(fp, len);
+
+	sg_copy_to_buffer(job->request_payload.sg_list,
+			  job->request_payload.sg_cnt,
+			  ct, len);
+
+	fh = fc_frame_header_get(fp);
+	fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
+	hton24(fh->fh_d_id, did);
+	hton24(fh->fh_s_id, lport->port_id);
+	fh->fh_type = FC_TYPE_CT;
+	hton24(fh->fh_f_ctl, FC_FCTL_REQ);
+	fh->fh_cs_ctl = 0;
+	fh->fh_df_ctl = 0;
+	fh->fh_parm_offset = 0;
+
+	info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
+	if (!info) {
+		fc_frame_free(fp);
+		return -ENOMEM;
+	}
+
+	info->job = job;
+	info->lport = lport;
+	info->rsp_code = FC_FS_ACC;
+	info->nents = job->reply_payload.sg_cnt;
+	info->sg = job->reply_payload.sg_list;
+
+	if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
+			      NULL, info, tov)) {
+		kfree(info);
+		return -ECOMM;
+	}
+	return 0;
+}
+
+/**
+ * fc_lport_bsg_request() - The common entry point for sending
+ *			    FC Passthrough requests
+ * @job: The BSG passthrough job
+ */
+int fc_lport_bsg_request(struct bsg_job *job)
+{
+	struct fc_bsg_request *bsg_request = job->request;
+	struct fc_bsg_reply *bsg_reply = job->reply;
+	struct Scsi_Host *shost = fc_bsg_to_shost(job);
+	struct fc_lport *lport = shost_priv(shost);
+	struct fc_rport *rport;
+	struct fc_rport_priv *rdata;
+	int rc = -EINVAL;
+	u32 did, tov;
+
+	bsg_reply->reply_payload_rcv_len = 0;
+
+	mutex_lock(&lport->lp_mutex);
+
+	switch (bsg_request->msgcode) {
+	case FC_BSG_RPT_ELS:
+		rport = fc_bsg_to_rport(job);
+		if (!rport)
+			break;
+
+		rdata = rport->dd_data;
+		rc = fc_lport_els_request(job, lport, rport->port_id,
+					  rdata->e_d_tov);
+		break;
+
+	case FC_BSG_RPT_CT:
+		rport = fc_bsg_to_rport(job);
+		if (!rport)
+			break;
+
+		rdata = rport->dd_data;
+		rc = fc_lport_ct_request(job, lport, rport->port_id,
+					 rdata->e_d_tov);
+		break;
+
+	case FC_BSG_HST_CT:
+		did = ntoh24(bsg_request->rqst_data.h_ct.port_id);
+		if (did == FC_FID_DIR_SERV) {
+			rdata = lport->dns_rdata;
+			if (!rdata)
+				break;
+			tov = rdata->e_d_tov;
+		} else {
+			rdata = fc_rport_lookup(lport, did);
+			if (!rdata)
+				break;
+			tov = rdata->e_d_tov;
+			kref_put(&rdata->kref, fc_rport_destroy);
+		}
+
+		rc = fc_lport_ct_request(job, lport, did, tov);
+		break;
+
+	case FC_BSG_HST_ELS_NOLOGIN:
+		did = ntoh24(bsg_request->rqst_data.h_els.port_id);
+		rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
+		break;
+	}
+
+	mutex_unlock(&lport->lp_mutex);
+	return rc;
+}
+EXPORT_SYMBOL(fc_lport_bsg_request);