scsi: fnic: Add support for unsolicited requests and responses

Add support for unsolicited requests and responses. Add support to accept and reject frames. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202409291705.MugERX98-lkp@intel.com/ Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com> Co-developed-by: Gian Carlo Boffa <gcboffa@cisco.com> Signed-off-by: Gian Carlo Boffa <gcboffa@cisco.com> Co-developed-by: Arulprabhu Ponnusamy <arulponn@cisco.com> Signed-off-by: Arulprabhu Ponnusamy <arulponn@cisco.com> Co-developed-by: Arun Easi <aeasi@cisco.com> Signed-off-by: Arun Easi <aeasi@cisco.com> Co-developed-by: Karan Tilak Kumar <kartilak@cisco.com> Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com> Link: https://lore.kernel.org/r/20241212020312.4786-6-kartilak@cisco.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-03-06 20:59:54 +01:00 · 2024-12-11 18:03:02 -08:00 · 2024-12-11 18:03:02 -08:00 · f828af44b8
commit f828af44b8
parent b5a57f153b
1 changed files with 683 additions and 0 deletions
--- a/drivers/scsi/fnic/fdls_disc.c
+++ b/drivers/scsi/fnic/fdls_disc.c
@ -42,6 +42,8 @@ static void fdls_tport_timer_callback(struct timer_list *t);
 static void fdls_start_fabric_timer(struct fnic_iport_s *iport,
 			int timeout);
 static void fdls_init_plogi_frame(uint8_t *frame, struct fnic_iport_s *iport);
+static void fdls_init_els_acc_frame(uint8_t *frame, struct fnic_iport_s *iport);
+static void fdls_init_els_rjt_frame(uint8_t *frame, struct fnic_iport_s *iport);
 static void fdls_init_logo_frame(uint8_t *frame, struct fnic_iport_s *iport);
 static void fdls_init_fabric_abts_frame(uint8_t *frame,
 						struct fnic_iport_s *iport);
@ -447,6 +449,39 @@ void fdls_init_plogi_frame(uint8_t *frame,
 	FNIC_STD_SET_S_ID(pplogi->fchdr, s_id);
 }

+static void fdls_init_els_acc_frame(uint8_t *frame,
+		struct fnic_iport_s *iport)
+{
+	struct fc_std_els_acc_rsp *pels_acc;
+	uint8_t s_id[3];
+
+	pels_acc = (struct fc_std_els_acc_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	*pels_acc = (struct fc_std_els_acc_rsp) {
+		.fchdr = {.fh_r_ctl = FC_RCTL_ELS_REP,
+			  .fh_type = FC_TYPE_ELS, .fh_f_ctl = {FNIC_ELS_REP_FCTL, 0, 0}},
+		.acc.la_cmd = ELS_LS_ACC,
+	};
+
+	hton24(s_id, iport->fcid);
+	FNIC_STD_SET_S_ID(pels_acc->fchdr, s_id);
+	FNIC_STD_SET_RX_ID(pels_acc->fchdr, FNIC_UNASSIGNED_RXID);
+}
+
+static void fdls_init_els_rjt_frame(uint8_t *frame,
+		struct fnic_iport_s *iport)
+{
+	struct fc_std_els_rjt_rsp *pels_rjt;
+
+	pels_rjt = (struct fc_std_els_rjt_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	*pels_rjt = (struct fc_std_els_rjt_rsp) {
+		.fchdr = {.fh_r_ctl = FC_RCTL_ELS_REP, .fh_type = FC_TYPE_ELS,
+			  .fh_f_ctl = {FNIC_ELS_REP_FCTL, 0, 0}},
+		.rej.er_cmd = ELS_LS_RJT,
+	};
+
+	FNIC_STD_SET_RX_ID(pels_rjt->fchdr, FNIC_UNASSIGNED_RXID);
+}
+
 static void fdls_init_logo_frame(uint8_t *frame,
 		struct fnic_iport_s *iport)
 {
@ -484,6 +519,73 @@ static void fdls_init_fabric_abts_frame(uint8_t *frame,
 		.fh_parm_offset = 0x00000000,	/* bit:0 = 0 Abort a exchange */
 	};
 }
+
+static void
+fdls_send_rscn_resp(struct fnic_iport_s *iport,
+		    struct fc_frame_header *rscn_fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_els_acc_rsp *pels_acc;
+	struct fnic *fnic = iport->fnic;
+	uint16_t oxid;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_acc_rsp);
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate frame to send RSCN response");
+		return;
+	}
+
+	pels_acc = (struct fc_std_els_acc_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	fdls_init_els_acc_frame(frame, iport);
+
+	FNIC_STD_SET_D_ID(pels_acc->fchdr, rscn_fchdr->fh_s_id);
+
+	oxid = FNIC_STD_GET_OX_ID(rscn_fchdr);
+	FNIC_STD_SET_OX_ID(pels_acc->fchdr, oxid);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+		 "0x%x: FDLS send RSCN response with oxid: 0x%x",
+		 iport->fcid, oxid);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
+static void
+fdls_send_logo_resp(struct fnic_iport_s *iport,
+		    struct fc_frame_header *req_fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_els_acc_rsp *plogo_resp;
+	struct fnic *fnic = iport->fnic;
+	uint16_t oxid;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_acc_rsp);
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate frame to send LOGO response");
+		return;
+	}
+
+	plogo_resp = (struct fc_std_els_acc_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	fdls_init_els_acc_frame(frame, iport);
+
+	FNIC_STD_SET_D_ID(plogo_resp->fchdr, req_fchdr->fh_s_id);
+
+	oxid = FNIC_STD_GET_OX_ID(req_fchdr);
+	FNIC_STD_SET_OX_ID(plogo_resp->fchdr, oxid);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+		 "0x%x: FDLS send LOGO response with oxid: 0x%x",
+		 iport->fcid, oxid);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
 void
 fdls_send_tport_abts(struct fnic_iport_s *iport,
 					 struct fnic_tport_s *tport)
@ -3118,6 +3220,232 @@ fdls_process_fabric_abts_rsp(struct fnic_iport_s *iport,
 	}
 }

+static void
+fdls_process_abts_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_abts_ba_acc *pba_acc;
+	uint32_t nport_id;
+	uint16_t oxid;
+	struct fnic_tport_s *tport;
+	struct fnic *fnic = iport->fnic;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_abts_ba_acc);
+
+	nport_id = ntoh24(fchdr->fh_s_id);
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Received abort from SID 0x%8x", nport_id);
+
+	tport = fnic_find_tport_by_fcid(iport, nport_id);
+	if (tport) {
+		oxid = FNIC_STD_GET_OX_ID(fchdr);
+		if (tport->active_oxid == oxid) {
+			tport->flags |= FNIC_FDLS_TGT_ABORT_ISSUED;
+			fdls_free_oxid(iport, oxid, &tport->active_oxid);
+		}
+	}
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"0x%x: Failed to allocate frame to send response for ABTS req",
+				iport->fcid);
+		return;
+	}
+
+	pba_acc = (struct fc_std_abts_ba_acc *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	*pba_acc = (struct fc_std_abts_ba_acc) {
+		.fchdr = {.fh_r_ctl = FC_RCTL_BA_ACC,
+				.fh_f_ctl = {FNIC_FCP_RSP_FCTL, 0, 0}},
+		.acc = {.ba_low_seq_cnt = 0, .ba_high_seq_cnt = cpu_to_be16(0xFFFF)}
+	};
+
+	FNIC_STD_SET_S_ID(pba_acc->fchdr, fchdr->fh_d_id);
+	FNIC_STD_SET_D_ID(pba_acc->fchdr, fchdr->fh_s_id);
+	FNIC_STD_SET_OX_ID(pba_acc->fchdr, FNIC_STD_GET_OX_ID(fchdr));
+	FNIC_STD_SET_RX_ID(pba_acc->fchdr, FNIC_STD_GET_RX_ID(fchdr));
+
+	pba_acc->acc.ba_rx_id = cpu_to_be16(FNIC_STD_GET_RX_ID(fchdr));
+	pba_acc->acc.ba_ox_id = cpu_to_be16(FNIC_STD_GET_OX_ID(fchdr));
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+		 "0x%x: FDLS send BA ACC with oxid: 0x%x",
+		 iport->fcid, oxid);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
+static void
+fdls_process_unsupported_els_req(struct fnic_iport_s *iport,
+				 struct fc_frame_header *fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_els_rjt_rsp *pls_rsp;
+	uint16_t oxid;
+	uint32_t d_id = ntoh24(fchdr->fh_d_id);
+	struct fnic *fnic = iport->fnic;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_rjt_rsp);
+
+	if (iport->fcid != d_id) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Dropping unsupported ELS with illegal frame bits 0x%x\n",
+			 d_id);
+		return;
+	}
+
+	if ((iport->state != FNIC_IPORT_STATE_READY)
+		&& (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Dropping unsupported ELS request in iport state: %d",
+			 iport->state);
+		return;
+	}
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			"Failed to allocate frame to send response to unsupported ELS request");
+		return;
+	}
+
+	pls_rsp = (struct fc_std_els_rjt_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	fdls_init_els_rjt_frame(frame, iport);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: Process unsupported ELS request from SID: 0x%x",
+		     iport->fcid, ntoh24(fchdr->fh_s_id));
+
+	/* We don't support this ELS request, send a reject */
+	pls_rsp->rej.er_reason = 0x0B;
+	pls_rsp->rej.er_explan = 0x0;
+	pls_rsp->rej.er_vendor = 0x0;
+
+	FNIC_STD_SET_S_ID(pls_rsp->fchdr, fchdr->fh_d_id);
+	FNIC_STD_SET_D_ID(pls_rsp->fchdr, fchdr->fh_s_id);
+	oxid = FNIC_STD_GET_OX_ID(fchdr);
+	FNIC_STD_SET_OX_ID(pls_rsp->fchdr, oxid);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
+static void
+fdls_process_rls_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_rls_acc *prls_acc_rsp;
+	uint16_t oxid;
+	struct fnic *fnic = iport->fnic;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_rls_acc);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Process RLS request %d", iport->fnic->fnic_num);
+
+	if ((iport->state != FNIC_IPORT_STATE_READY)
+		&& (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received RLS req in iport state: %d. Dropping the frame.",
+			 iport->state);
+		return;
+	}
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate frame to send RLS accept");
+		return;
+	}
+	prls_acc_rsp = (struct fc_std_rls_acc *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+
+	FNIC_STD_SET_S_ID(prls_acc_rsp->fchdr, fchdr->fh_d_id);
+	FNIC_STD_SET_D_ID(prls_acc_rsp->fchdr, fchdr->fh_s_id);
+
+	oxid = FNIC_STD_GET_OX_ID(fchdr);
+	FNIC_STD_SET_OX_ID(prls_acc_rsp->fchdr, oxid);
+	FNIC_STD_SET_RX_ID(prls_acc_rsp->fchdr, FNIC_UNASSIGNED_RXID);
+
+	FNIC_STD_SET_F_CTL(prls_acc_rsp->fchdr, FNIC_ELS_REP_FCTL << 16);
+	FNIC_STD_SET_R_CTL(prls_acc_rsp->fchdr, FC_RCTL_ELS_REP);
+	FNIC_STD_SET_TYPE(prls_acc_rsp->fchdr, FC_TYPE_ELS);
+
+	prls_acc_rsp->els.rls_cmd = ELS_LS_ACC;
+	prls_acc_rsp->els.rls_lesb.lesb_link_fail =
+	    cpu_to_be32(iport->fnic->link_down_cnt);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
+static void
+fdls_process_els_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr,
+					 uint32_t len)
+{
+	uint8_t *frame;
+	struct fc_std_els_acc_rsp *pels_acc;
+	uint16_t oxid;
+	uint8_t *fc_payload;
+	uint8_t type;
+	struct fnic *fnic = iport->fnic;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET;
+
+	fc_payload = (uint8_t *) fchdr + sizeof(struct fc_frame_header);
+	type = *fc_payload;
+
+	if ((iport->state != FNIC_IPORT_STATE_READY)
+		&& (iport->state != FNIC_IPORT_STATE_FABRIC_DISC)) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Dropping ELS frame type: 0x%x in iport state: %d",
+				 type, iport->state);
+		return;
+	}
+	switch (type) {
+	case ELS_ECHO:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "sending LS_ACC for ECHO request %d\n",
+					 iport->fnic->fnic_num);
+		break;
+
+	case ELS_RRQ:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "sending LS_ACC for RRQ request %d\n",
+					 iport->fnic->fnic_num);
+		break;
+
+	default:
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "sending LS_ACC for 0x%x ELS frame\n", type);
+		break;
+	}
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate frame to send ELS response for 0x%x",
+				type);
+		return;
+	}
+
+	if (type == ELS_ECHO) {
+		/* Brocade sends a longer payload, copy all frame back */
+		memcpy(frame, fchdr, len);
+	}
+
+	pels_acc = (struct fc_std_els_acc_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	fdls_init_els_acc_frame(frame, iport);
+
+	FNIC_STD_SET_D_ID(pels_acc->fchdr, fchdr->fh_s_id);
+
+	oxid = FNIC_STD_GET_OX_ID(fchdr);
+	FNIC_STD_SET_OX_ID(pels_acc->fchdr, oxid);
+
+	if (type == ELS_ECHO)
+		frame_size += len;
+	else
+		frame_size += sizeof(struct fc_std_els_acc_rsp);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
 static void
 fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
 			  struct fc_frame_header *fchdr)
@ -3254,6 +3582,336 @@ fdls_process_tgt_abts_rsp(struct fnic_iport_s *iport,
 	}

 }
+
+static void
+fdls_process_plogi_req(struct fnic_iport_s *iport,
+		       struct fc_frame_header *fchdr)
+{
+	uint8_t *frame;
+	struct fc_std_els_rjt_rsp *pplogi_rsp;
+	uint16_t oxid;
+	uint32_t d_id = ntoh24(fchdr->fh_d_id);
+	struct fnic *fnic = iport->fnic;
+	uint16_t frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_rjt_rsp);
+
+	if (iport->fcid != d_id) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received PLOGI with illegal frame bits. Dropping frame from 0x%x",
+			 d_id);
+		return;
+	}
+
+	if (iport->state != FNIC_IPORT_STATE_READY) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "Received PLOGI request in iport state: %d Dropping frame",
+			 iport->state);
+		return;
+	}
+
+	frame = fdls_alloc_frame(iport);
+	if (frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			"Failed to allocate frame to send response to PLOGI request");
+		return;
+	}
+
+	pplogi_rsp = (struct fc_std_els_rjt_rsp *) (frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+	fdls_init_els_rjt_frame(frame, iport);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "0x%x: Process PLOGI request from SID: 0x%x",
+				 iport->fcid, ntoh24(fchdr->fh_s_id));
+
+	/* We don't support PLOGI request, send a reject */
+	pplogi_rsp->rej.er_reason = 0x0B;
+	pplogi_rsp->rej.er_explan = 0x0;
+	pplogi_rsp->rej.er_vendor = 0x0;
+
+	FNIC_STD_SET_S_ID(pplogi_rsp->fchdr, fchdr->fh_d_id);
+	FNIC_STD_SET_D_ID(pplogi_rsp->fchdr, fchdr->fh_s_id);
+	oxid = FNIC_STD_GET_OX_ID(fchdr);
+	FNIC_STD_SET_OX_ID(pplogi_rsp->fchdr, oxid);
+
+	fnic_send_fcoe_frame(iport, frame, frame_size);
+}
+
+static void
+fdls_process_logo_req(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
+{
+	struct fc_std_logo *logo = (struct fc_std_logo *)fchdr;
+	uint32_t nport_id;
+	uint64_t nport_name;
+	struct fnic_tport_s *tport;
+	struct fnic *fnic = iport->fnic;
+	uint16_t oxid;
+
+	nport_id = ntoh24(logo->els.fl_n_port_id);
+	nport_name = be64_to_cpu(logo->els.fl_n_port_wwn);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Process LOGO request from fcid: 0x%x", nport_id);
+
+	if (iport->state != FNIC_IPORT_STATE_READY) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			 "Dropping LOGO req from 0x%x in iport state: %d",
+			 nport_id, iport->state);
+		return;
+	}
+
+	tport = fnic_find_tport_by_fcid(iport, nport_id);
+
+	if (!tport) {
+		/* We are not logged in with the nport, log and drop... */
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			 "Received LOGO from an nport not logged in: 0x%x(0x%llx)",
+			 nport_id, nport_name);
+		return;
+	}
+	if (tport->fcid != nport_id) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+		 "Received LOGO with invalid target port fcid: 0x%x(0x%llx)",
+		 nport_id, nport_name);
+		return;
+	}
+	if (tport->timer_pending) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+					 "tport fcid 0x%x: Canceling disc timer\n",
+					 tport->fcid);
+		fnic_del_tport_timer_sync(fnic, tport);
+		tport->timer_pending = 0;
+	}
+
+	/* got a logo in response to adisc to a target which has logged out */
+	if (tport->state == FDLS_TGT_STATE_ADISC) {
+		tport->retry_counter = 0;
+		oxid = tport->active_oxid;
+		fdls_free_oxid(iport, oxid, &tport->active_oxid);
+		fdls_delete_tport(iport, tport);
+		fdls_send_logo_resp(iport, &logo->fchdr);
+		if ((iport->state == FNIC_IPORT_STATE_READY)
+			&& (fdls_get_state(&iport->fabric) != FDLS_STATE_SEND_GPNFT)
+			&& (fdls_get_state(&iport->fabric) != FDLS_STATE_RSCN_GPN_FT)) {
+			FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+						 "Sending GPNFT in response to LOGO from Target:0x%x",
+						 nport_id);
+			fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT);
+			return;
+		}
+	} else {
+		fdls_delete_tport(iport, tport);
+	}
+	if (iport->state == FNIC_IPORT_STATE_READY) {
+		fdls_send_logo_resp(iport, &logo->fchdr);
+		if ((fdls_get_state(&iport->fabric) != FDLS_STATE_SEND_GPNFT) &&
+			(fdls_get_state(&iport->fabric) != FDLS_STATE_RSCN_GPN_FT)) {
+			FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+						 "Sending GPNFT in response to LOGO from Target:0x%x",
+						 nport_id);
+			fdls_send_gpn_ft(iport, FDLS_STATE_SEND_GPNFT);
+		}
+	}
+}
+
+static void
+fdls_process_rscn(struct fnic_iport_s *iport, struct fc_frame_header *fchdr)
+{
+	struct fc_std_rscn *rscn;
+	struct fc_els_rscn_page *rscn_port = NULL;
+	int num_ports;
+	struct fnic_tport_s *tport, *next;
+	uint32_t nport_id;
+	uint8_t fcid[3];
+	int newports = 0;
+	struct fnic_fdls_fabric_s *fdls = &iport->fabric;
+	struct fnic *fnic = iport->fnic;
+	uint16_t rscn_payload_len;
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "FDLS process RSCN %p", iport);
+
+	if (iport->state != FNIC_IPORT_STATE_READY) {
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "FDLS RSCN received in state(%d). Dropping",
+					 fdls_get_state(fdls));
+		return;
+	}
+
+	rscn = (struct fc_std_rscn *)fchdr;
+	rscn_payload_len = be16_to_cpu(rscn->els.rscn_plen);
+
+	/* frame validation */
+	if ((rscn_payload_len % 4 != 0) || (rscn_payload_len < 8)
+	    || (rscn_payload_len > 1024)
+	    || (rscn->els.rscn_page_len != 4)) {
+		num_ports = 0;
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RSCN payload_len: 0x%x page_len: 0x%x",
+				     rscn_payload_len, rscn->els.rscn_page_len);
+		/* if this happens then we need to send ADISC to all the tports. */
+		list_for_each_entry_safe(tport, next, &iport->tport_list, links) {
+			if (tport->state == FDLS_TGT_STATE_READY)
+				tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
+			FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "RSCN for port id: 0x%x", tport->fcid);
+		}
+	} else {
+		num_ports = (rscn_payload_len - 4) / rscn->els.rscn_page_len;
+		rscn_port = (struct fc_els_rscn_page *)(rscn + 1);
+	}
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+			 "RSCN received for num_ports: %d payload_len: %d page_len: %d ",
+		     num_ports, rscn_payload_len, rscn->els.rscn_page_len);
+
+	/*
+	 * RSCN have at least one Port_ID page , but may not have any port_id
+	 * in it. If no port_id is specified in the Port_ID page , we send
+	 * ADISC to all the tports
+	 */
+
+	while (num_ports) {
+
+		memcpy(fcid, rscn_port->rscn_fid, 3);
+
+		nport_id = ntoh24(fcid);
+		rscn_port++;
+		num_ports--;
+		/* if this happens then we need to send ADISC to all the tports. */
+		if (nport_id == 0) {
+			list_for_each_entry_safe(tport, next, &iport->tport_list,
+									 links) {
+				if (tport->state == FDLS_TGT_STATE_READY)
+					tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
+
+				FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+							 "RSCN for port id: 0x%x", tport->fcid);
+			}
+			break;
+		}
+		tport = fnic_find_tport_by_fcid(iport, nport_id);
+
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+					 "RSCN port id list: 0x%x", nport_id);
+
+		if (!tport) {
+			newports++;
+			continue;
+		}
+		if (tport->state == FDLS_TGT_STATE_READY)
+			tport->flags |= FNIC_FDLS_TPORT_SEND_ADISC;
+	}
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+		 "FDLS process RSCN sending GPN_FT: newports: %d", newports);
+		fdls_send_gpn_ft(iport, FDLS_STATE_RSCN_GPN_FT);
+		fdls_send_rscn_resp(iport, fchdr);
+}
+static void
+fdls_process_adisc_req(struct fnic_iport_s *iport,
+		       struct fc_frame_header *fchdr)
+{
+	struct fc_std_els_adisc *padisc_acc;
+	struct fc_std_els_adisc *adisc_req = (struct fc_std_els_adisc *)fchdr;
+	uint64_t frame_wwnn;
+	uint64_t frame_wwpn;
+	uint32_t tgt_fcid;
+	struct fnic_tport_s *tport;
+	uint8_t *fcid;
+	uint8_t *rjt_frame;
+	uint8_t *acc_frame;
+	struct fc_std_els_rjt_rsp *prjts_rsp;
+	uint16_t oxid;
+	struct fnic *fnic = iport->fnic;
+	uint16_t rjt_frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_rjt_rsp);
+	uint16_t acc_frame_size = FNIC_ETH_FCOE_HDRS_OFFSET +
+			sizeof(struct fc_std_els_adisc);
+
+	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
+				 "Process ADISC request %d", iport->fnic->fnic_num);
+
+	fcid = FNIC_STD_GET_S_ID(fchdr);
+	tgt_fcid = ntoh24(fcid);
+	tport = fnic_find_tport_by_fcid(iport, tgt_fcid);
+	if (!tport) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+					 "tport for fcid: 0x%x not found. Dropping ADISC req.",
+					 tgt_fcid);
+		return;
+	}
+	if (iport->state != FNIC_IPORT_STATE_READY) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			 "Dropping ADISC req from fcid: 0x%x in iport state: %d",
+			 tgt_fcid, iport->state);
+		return;
+	}
+
+	frame_wwnn = be64_to_cpu(adisc_req->els.adisc_wwnn);
+	frame_wwpn = be64_to_cpu(adisc_req->els.adisc_wwpn);
+
+	if ((frame_wwnn != tport->wwnn) || (frame_wwpn != tport->wwpn)) {
+		/* send reject */
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			 "ADISC req from fcid: 0x%x mismatch wwpn: 0x%llx wwnn: 0x%llx",
+			 tgt_fcid, frame_wwpn, frame_wwnn);
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+			 "local tport wwpn: 0x%llx wwnn: 0x%llx. Sending RJT",
+			 tport->wwpn, tport->wwnn);
+
+		rjt_frame = fdls_alloc_frame(iport);
+		if (rjt_frame == NULL) {
+			FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate rjt_frame to send response to ADISC request");
+			return;
+		}
+
+		prjts_rsp = (struct fc_std_els_rjt_rsp *) (rjt_frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+		fdls_init_els_rjt_frame(rjt_frame, iport);
+
+		prjts_rsp->rej.er_reason = 0x03;	/*  logical error */
+		prjts_rsp->rej.er_explan = 0x1E;	/*  N_port login required */
+		prjts_rsp->rej.er_vendor = 0x0;
+
+		FNIC_STD_SET_S_ID(prjts_rsp->fchdr, fchdr->fh_d_id);
+		FNIC_STD_SET_D_ID(prjts_rsp->fchdr, fchdr->fh_s_id);
+		oxid = FNIC_STD_GET_OX_ID(fchdr);
+		FNIC_STD_SET_OX_ID(prjts_rsp->fchdr, oxid);
+
+		fnic_send_fcoe_frame(iport, rjt_frame, rjt_frame_size);
+		return;
+	}
+
+	acc_frame = fdls_alloc_frame(iport);
+	if (acc_frame == NULL) {
+		FNIC_FCS_DBG(KERN_ERR, fnic->lport->host, fnic->fnic_num,
+				"Failed to allocate frame to send ADISC accept");
+		return;
+	}
+
+	padisc_acc = (struct fc_std_els_adisc *) (acc_frame + FNIC_ETH_FCOE_HDRS_OFFSET);
+
+	FNIC_STD_SET_S_ID(padisc_acc->fchdr, fchdr->fh_d_id);
+	FNIC_STD_SET_D_ID(padisc_acc->fchdr, fchdr->fh_s_id);
+
+	FNIC_STD_SET_F_CTL(padisc_acc->fchdr, FNIC_ELS_REP_FCTL << 16);
+	FNIC_STD_SET_R_CTL(padisc_acc->fchdr, FC_RCTL_ELS_REP);
+	FNIC_STD_SET_TYPE(padisc_acc->fchdr, FC_TYPE_ELS);
+
+	oxid = FNIC_STD_GET_OX_ID(fchdr);
+	FNIC_STD_SET_OX_ID(padisc_acc->fchdr, oxid);
+	FNIC_STD_SET_RX_ID(padisc_acc->fchdr, FNIC_UNASSIGNED_RXID);
+
+	padisc_acc->els.adisc_cmd = ELS_LS_ACC;
+
+	FNIC_STD_SET_NPORT_NAME(&padisc_acc->els.adisc_wwpn,
+			iport->wwpn);
+	FNIC_STD_SET_NODE_NAME(&padisc_acc->els.adisc_wwnn,
+			iport->wwnn);
+	memcpy(padisc_acc->els.adisc_port_id, fchdr->fh_d_id, 3);
+
+	fnic_send_fcoe_frame(iport, acc_frame, acc_frame_size);
+}
+
 /*
 * Performs a validation for all FCOE frames and return the frame type
 */
@ -3529,6 +4187,31 @@ void fnic_fdls_recv_frame(struct fnic_iport_s *iport, void *rx_frame,
 	case FNIC_FABRIC_BLS_ABTS_RSP:
 			fdls_process_fabric_abts_rsp(iport, fchdr);
 		break;
+	case FNIC_BLS_ABTS_REQ:
+		fdls_process_abts_req(iport, fchdr);
+		break;
+	case FNIC_ELS_UNSUPPORTED_REQ:
+		fdls_process_unsupported_els_req(iport, fchdr);
+		break;
+	case FNIC_ELS_PLOGI_REQ:
+		fdls_process_plogi_req(iport, fchdr);
+		break;
+	case FNIC_ELS_RSCN_REQ:
+		fdls_process_rscn(iport, fchdr);
+		break;
+	case FNIC_ELS_LOGO_REQ:
+		fdls_process_logo_req(iport, fchdr);
+		break;
+	case FNIC_ELS_RRQ:
+	case FNIC_ELS_ECHO_REQ:
+		fdls_process_els_req(iport, fchdr, len);
+		break;
+	case FNIC_ELS_ADISC:
+		fdls_process_adisc_req(iport, fchdr);
+		break;
+	case FNIC_ELS_RLS:
+		fdls_process_rls_req(iport, fchdr);
+		break;
 	default:
 		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host, fnic->fnic_num,
 			 "s_id: 0x%x d_did: 0x%x", s_id, d_id);