scsi: lpfc: NVME Target: bind to nvmet_fc api

NVME Target: Tie in to NVME Fabrics nvmet_fc LLDD target api

Adds the routines to:
- register and deregister the FC port as a nvmet-fc targetport
- binding of nvme queues to adapter WQs
- receipt and passing of NVME LS's to transport, sending transport response
- receipt of NVME FCP CMD IUs, processing FCP target io data transmission
  commands; transmission of FCP io response
- Abort operations for tgt io exchanges

[mkp: fixed space at end of file warning]

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/Makefile

@@ -31,4 +31,4 @@ obj-$(CONFIG_SCSI_LPFC) := lpfc.o
 lpfc-objs := lpfc_mem.o lpfc_sli.o lpfc_ct.o lpfc_els.o \
 	lpfc_hbadisc.o	lpfc_init.o lpfc_mbox.o lpfc_nportdisc.o   \
 	lpfc_scsi.o lpfc_attr.o lpfc_vport.o lpfc_debugfs.o lpfc_bsg.o \
-	lpfc_nvme.o
+	lpfc_nvme.o lpfc_nvmet.o

drivers/scsi/lpfc/lpfc_crtn.h

@@ -363,6 +363,8 @@ void *lpfc_nvmet_buf_alloc(struct lpfc_hba *phba, int flags,
 void lpfc_nvmet_buf_free(struct lpfc_hba *phba, void *virtp, dma_addr_t dma);
 
 void lpfc_in_buf_free(struct lpfc_hba *, struct lpfc_dmabuf *);
+void lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp);
+
 /* Function prototypes. */
 const char* lpfc_info(struct Scsi_Host *);
 int lpfc_scan_finished(struct Scsi_Host *, unsigned long);
@@ -536,6 +538,14 @@ int lpfc_nvme_register_port(struct lpfc_vport *vport,
 int lpfc_nvme_create_localport(struct lpfc_vport *vport);
 void lpfc_nvme_destroy_localport(struct lpfc_vport *vport);
 void lpfc_nvme_update_localport(struct lpfc_vport *vport);
+int lpfc_nvmet_create_targetport(struct lpfc_hba *phba);
+int lpfc_nvmet_update_targetport(struct lpfc_hba *phba);
+void lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba);
+void lpfc_nvmet_unsol_ls_event(struct lpfc_hba *phba,
+			struct lpfc_sli_ring *pring, struct lpfc_iocbq *piocb);
+void lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
+			struct lpfc_sli_ring *pring,
+			struct rqb_dmabuf *nvmebuf, uint64_t isr_ts);
 void lpfc_nvme_mod_param_dep(struct lpfc_hba *phba);
 void lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba,
 				struct lpfc_iocbq *cmdiocb,

drivers/scsi/lpfc/lpfc_ct.c

@@ -1436,7 +1436,7 @@ lpfc_ns_cmd(struct lpfc_vport *vport, int cmdcode,
 			if ((vport == phba->pport) && phba->nvmet_support) {
 				CtReq->un.rff.fbits = (FC4_FEATURE_TARGET |
 					FC4_FEATURE_NVME_DISC);
-				/* todo: update targetport attributes */
+				lpfc_nvmet_update_targetport(phba);
 			} else {
 				lpfc_nvme_update_localport(vport);
 			}

drivers/scsi/lpfc/lpfc_els.c

@@ -2636,9 +2636,10 @@ out:
 
 		if ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
 		    (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
-			if (!phba->nvmet_support)
+			if (phba->nvmet_support)
+				lpfc_nvmet_update_targetport(phba);
+			else
 				lpfc_nvme_update_localport(phba->pport);
-			/* todo: tgt: update targetport attributes */
 		}
 
 		mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);

drivers/scsi/lpfc/lpfc_hbadisc.c

@@ -911,9 +911,10 @@ lpfc_linkdown(struct lpfc_hba *phba)
 
 			if ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
 			    (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
-				if (!phba->nvmet_support)
+				if (phba->nvmet_support)
+					lpfc_nvmet_update_targetport(phba);
+				else
 					lpfc_nvme_update_localport(vports[i]);
-				/* todo: tgt: update targetport attributes */
 			}
 		}
 	}
@@ -3587,9 +3588,10 @@ lpfc_mbx_cmpl_reg_vpi(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 
 		if ((phba->cfg_enable_fc4_type == LPFC_ENABLE_BOTH) ||
 		    (phba->cfg_enable_fc4_type == LPFC_ENABLE_NVME)) {
-			if (!phba->nvmet_support)
+			if (phba->nvmet_support)
+				lpfc_nvmet_update_targetport(phba);
+			else
 				lpfc_nvme_update_localport(vport);
-			/* todo: update targetport attributes */
 		}
 		goto out;
 	}

drivers/scsi/lpfc/lpfc_init.c

@@ -10397,7 +10397,13 @@ lpfc_pci_remove_one_s3(struct pci_dev *pdev)
 	/* Remove FC host and then SCSI host with the physical port */
 	fc_remove_host(shost);
 	scsi_remove_host(shost);
+
+	/* Perform ndlp cleanup on the physical port.  The nvme and nvmet
+	 * localports are destroyed after to cleanup all transport memory.
+	 */
 	lpfc_cleanup(vport);
+	lpfc_nvmet_destroy_targetport(phba);
+	lpfc_nvme_destroy_localport(vport);
 
 	/*
 	 * Bring down the SLI Layer. This step disable all interrupts,
@@ -11203,13 +11209,13 @@ lpfc_pci_remove_one_s4(struct pci_dev *pdev)
 	/* Remove FC host and then SCSI host with the physical port */
 	fc_remove_host(shost);
 	scsi_remove_host(shost);
-	/* todo: tgt: remove targetport */
 
-	/* Perform ndlp cleanup on the physical port.  The nvme localport
-	 * is destroyed after to ensure all rports are io-disabled.
+	/* Perform ndlp cleanup on the physical port.  The nvme and nvmet
+	 * localports are destroyed after to cleanup all transport memory.
 	 */
-	lpfc_nvme_destroy_localport(vport);
 	lpfc_cleanup(vport);
+	lpfc_nvmet_destroy_targetport(phba);
+	lpfc_nvme_destroy_localport(vport);
 
 	/*
 	 * Bring down the SLI Layer. This step disables all interrupts,

drivers/scsi/lpfc/lpfc_mem.c

@@ -763,3 +763,48 @@ lpfc_in_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
 	}
 	return;
 }
+
+/**
+ * lpfc_rq_buf_free - Free a RQ DMA buffer
+ * @phba: HBA buffer is associated with
+ * @mp: Buffer to free
+ *
+ * Description: Frees the given DMA buffer in the appropriate way given by
+ * reposting it to its associated RQ so it can be reused.
+ *
+ * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
+ *
+ * Returns: None
+ **/
+void
+lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
+{
+	struct lpfc_rqb *rqbp;
+	struct lpfc_rqe hrqe;
+	struct lpfc_rqe drqe;
+	struct rqb_dmabuf *rqb_entry;
+	unsigned long flags;
+	int rc;
+
+	if (!mp)
+		return;
+
+	rqb_entry = container_of(mp, struct rqb_dmabuf, hbuf);
+	rqbp = rqb_entry->hrq->rqbp;
+
+	spin_lock_irqsave(&phba->hbalock, flags);
+	list_del(&rqb_entry->hbuf.list);
+	hrqe.address_lo = putPaddrLow(rqb_entry->hbuf.phys);
+	hrqe.address_hi = putPaddrHigh(rqb_entry->hbuf.phys);
+	drqe.address_lo = putPaddrLow(rqb_entry->dbuf.phys);
+	drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
+	rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
+	if (rc < 0) {
+		(rqbp->rqb_free_buffer)(phba, rqb_entry);
+	} else {
+		list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
+		rqbp->buffer_count++;
+	}
+
+	spin_unlock_irqrestore(&phba->hbalock, flags);
+}

drivers/scsi/lpfc/lpfc_nvmet.c

@@ -0,0 +1,1671 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Fibre Channsel Host Bus Adapters.                                *
+ * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ ********************************************************************/
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <asm/unaligned.h>
+#include <linux/crc-t10dif.h>
+#include <net/checksum.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/fc/fc_fs.h>
+
+#include <../drivers/nvme/host/nvme.h>
+#include <linux/nvme-fc-driver.h>
+
+#include "lpfc_version.h"
+#include "lpfc_hw4.h"
+#include "lpfc_hw.h"
+#include "lpfc_sli.h"
+#include "lpfc_sli4.h"
+#include "lpfc_nl.h"
+#include "lpfc_disc.h"
+#include "lpfc.h"
+#include "lpfc_scsi.h"
+#include "lpfc_nvme.h"
+#include "lpfc_nvmet.h"
+#include "lpfc_logmsg.h"
+#include "lpfc_crtn.h"
+#include "lpfc_vport.h"
+
+static struct lpfc_iocbq *lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *,
+						 struct lpfc_nvmet_rcv_ctx *,
+						 dma_addr_t rspbuf,
+						 uint16_t rspsize);
+static struct lpfc_iocbq *lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *,
+						  struct lpfc_nvmet_rcv_ctx *);
+static int lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *,
+					  struct lpfc_nvmet_rcv_ctx *,
+					  uint32_t, uint16_t);
+static int lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *,
+					    struct lpfc_nvmet_rcv_ctx *,
+					    uint32_t, uint16_t);
+static int lpfc_nvmet_unsol_ls_issue_abort(struct lpfc_hba *,
+					   struct lpfc_nvmet_rcv_ctx *,
+					   uint32_t, uint16_t);
+
+/**
+ * lpfc_nvmet_xmt_ls_rsp_cmp - Completion handler for LS Response
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. This function is the completion handler for NVME LS commands
+ * The function frees memory resources used for the NVME commands.
+ **/
+static void
+lpfc_nvmet_xmt_ls_rsp_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+			  struct lpfc_wcqe_complete *wcqe)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct nvmefc_tgt_ls_req *rsp;
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	uint32_t status, result;
+
+	status = bf_get(lpfc_wcqe_c_status, wcqe);
+	result = wcqe->parameter;
+	if (!phba->targetport)
+		goto out;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+
+	if (status)
+		atomic_inc(&tgtp->xmt_ls_rsp_error);
+	else
+		atomic_inc(&tgtp->xmt_ls_rsp_cmpl);
+
+out:
+	ctxp = cmdwqe->context2;
+	rsp = &ctxp->ctx.ls_req;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+			"6038 %s: Entrypoint: ctx %p status %x/%x\n", __func__,
+			ctxp, status, result);
+
+	lpfc_nlp_put(cmdwqe->context1);
+	cmdwqe->context2 = NULL;
+	cmdwqe->context3 = NULL;
+	lpfc_sli_release_iocbq(phba, cmdwqe);
+	rsp->done(rsp);
+	kfree(ctxp);
+}
+
+/**
+ * lpfc_nvmet_rq_post - Repost a NVMET RQ DMA buffer and clean up context
+ * @phba: HBA buffer is associated with
+ * @ctxp: context to clean up
+ * @mp: Buffer to free
+ *
+ * Description: Frees the given DMA buffer in the appropriate way given by
+ * reposting it to its associated RQ so it can be reused.
+ *
+ * Notes: Takes phba->hbalock.  Can be called with or without other locks held.
+ *
+ * Returns: None
+ **/
+void
+lpfc_nvmet_rq_post(struct lpfc_hba *phba, struct lpfc_nvmet_rcv_ctx *ctxp,
+		   struct lpfc_dmabuf *mp)
+{
+	if (ctxp) {
+		if (ctxp->txrdy) {
+			pci_pool_free(phba->txrdy_payload_pool, ctxp->txrdy,
+				      ctxp->txrdy_phys);
+			ctxp->txrdy = NULL;
+			ctxp->txrdy_phys = 0;
+		}
+		ctxp->state = LPFC_NVMET_STE_FREE;
+	}
+	lpfc_rq_buf_free(phba, mp);
+}
+
+/**
+ * lpfc_nvmet_xmt_fcp_op_cmp - Completion handler for FCP Response
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. This function is the completion handler for NVME FCP commands
+ * The function frees memory resources used for the NVME commands.
+ **/
+static void
+lpfc_nvmet_xmt_fcp_op_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+			  struct lpfc_wcqe_complete *wcqe)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct nvmefc_tgt_fcp_req *rsp;
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	uint32_t status, result, op, start_clean;
+
+	ctxp = cmdwqe->context2;
+	rsp = &ctxp->ctx.fcp_req;
+	op = rsp->op;
+	ctxp->flag &= ~LPFC_NVMET_IO_INP;
+
+	status = bf_get(lpfc_wcqe_c_status, wcqe);
+	result = wcqe->parameter;
+
+	if (!phba->targetport)
+		goto out;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	if (status) {
+		rsp->fcp_error = NVME_SC_DATA_XFER_ERROR;
+		rsp->transferred_length = 0;
+		atomic_inc(&tgtp->xmt_fcp_rsp_error);
+	} else {
+		rsp->fcp_error = NVME_SC_SUCCESS;
+		if (op == NVMET_FCOP_RSP)
+			rsp->transferred_length = rsp->rsplen;
+		else
+			rsp->transferred_length = rsp->transfer_length;
+		atomic_inc(&tgtp->xmt_fcp_rsp_cmpl);
+	}
+
+out:
+	if ((op == NVMET_FCOP_READDATA_RSP) ||
+	    (op == NVMET_FCOP_RSP)) {
+		/* Sanity check */
+		ctxp->state = LPFC_NVMET_STE_DONE;
+		ctxp->entry_cnt++;
+		rsp->done(rsp);
+		/* Let Abort cmpl repost the context */
+		if (!(ctxp->flag & LPFC_NVMET_ABORT_OP))
+			lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+	} else {
+		ctxp->entry_cnt++;
+		start_clean = offsetof(struct lpfc_iocbq, wqe);
+		memset(((char *)cmdwqe) + start_clean, 0,
+		       (sizeof(struct lpfc_iocbq) - start_clean));
+		rsp->done(rsp);
+	}
+}
+
+static int
+lpfc_nvmet_xmt_ls_rsp(struct nvmet_fc_target_port *tgtport,
+		      struct nvmefc_tgt_ls_req *rsp)
+{
+	struct lpfc_nvmet_rcv_ctx *ctxp =
+		container_of(rsp, struct lpfc_nvmet_rcv_ctx, ctx.ls_req);
+	struct lpfc_hba *phba = ctxp->phba;
+	struct hbq_dmabuf *nvmebuf =
+		(struct hbq_dmabuf *)ctxp->rqb_buffer;
+	struct lpfc_iocbq *nvmewqeq;
+	struct lpfc_nvmet_tgtport *nvmep = tgtport->private;
+	struct lpfc_dmabuf dmabuf;
+	struct ulp_bde64 bpl;
+	int rc;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+			"6023 %s: Entrypoint ctx %p %p\n", __func__,
+			ctxp, tgtport);
+
+	nvmewqeq = lpfc_nvmet_prep_ls_wqe(phba, ctxp, rsp->rspdma,
+				      rsp->rsplen);
+	if (nvmewqeq == NULL) {
+		atomic_inc(&nvmep->xmt_ls_drop);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6150 LS Drop IO x%x: Prep\n",
+				ctxp->oxid);
+		lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+		lpfc_nvmet_unsol_ls_issue_abort(phba, ctxp,
+						ctxp->sid, ctxp->oxid);
+		return -ENOMEM;
+	}
+
+	/* Save numBdes for bpl2sgl */
+	nvmewqeq->rsvd2 = 1;
+	nvmewqeq->hba_wqidx = 0;
+	nvmewqeq->context3 = &dmabuf;
+	dmabuf.virt = &bpl;
+	bpl.addrLow = nvmewqeq->wqe.xmit_sequence.bde.addrLow;
+	bpl.addrHigh = nvmewqeq->wqe.xmit_sequence.bde.addrHigh;
+	bpl.tus.f.bdeSize = rsp->rsplen;
+	bpl.tus.f.bdeFlags = 0;
+	bpl.tus.w = le32_to_cpu(bpl.tus.w);
+
+	nvmewqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_rsp_cmp;
+	nvmewqeq->iocb_cmpl = NULL;
+	nvmewqeq->context2 = ctxp;
+
+	rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, nvmewqeq);
+	if (rc == WQE_SUCCESS) {
+		/*
+		 * Okay to repost buffer here, but wait till cmpl
+		 * before freeing ctxp and iocbq.
+		 */
+		lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+		ctxp->rqb_buffer = 0;
+		atomic_inc(&nvmep->xmt_ls_rsp);
+		return 0;
+	}
+	/* Give back resources */
+	atomic_inc(&nvmep->xmt_ls_drop);
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+			"6151 LS Drop IO x%x: Issue %d\n",
+			ctxp->oxid, rc);
+
+	lpfc_nlp_put(nvmewqeq->context1);
+
+	lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+	lpfc_nvmet_unsol_ls_issue_abort(phba, ctxp, ctxp->sid, ctxp->oxid);
+	return -ENXIO;
+}
+
+static int
+lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
+		      struct nvmefc_tgt_fcp_req *rsp)
+{
+	struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
+	struct lpfc_nvmet_rcv_ctx *ctxp =
+		container_of(rsp, struct lpfc_nvmet_rcv_ctx, ctx.fcp_req);
+	struct lpfc_hba *phba = ctxp->phba;
+	struct lpfc_iocbq *nvmewqeq;
+	unsigned long iflags;
+	int rc;
+
+	if (rsp->op == NVMET_FCOP_ABORT) {
+		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+				"6103 Abort op: oxri x%x %d cnt %d\n",
+				ctxp->oxid, ctxp->state, ctxp->entry_cnt);
+		atomic_inc(&lpfc_nvmep->xmt_fcp_abort);
+		ctxp->entry_cnt++;
+		ctxp->flag |= LPFC_NVMET_ABORT_OP;
+		if (ctxp->flag & LPFC_NVMET_IO_INP)
+			lpfc_nvmet_sol_fcp_issue_abort(phba, ctxp, ctxp->sid,
+						       ctxp->oxid);
+		else
+			lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, ctxp->sid,
+							 ctxp->oxid);
+		return 0;
+	}
+
+	/* Sanity check */
+	if (ctxp->state == LPFC_NVMET_STE_ABORT) {
+		atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6102 Bad state IO x%x aborted\n",
+				ctxp->oxid);
+		goto aerr;
+	}
+
+	nvmewqeq = lpfc_nvmet_prep_fcp_wqe(phba, ctxp);
+	if (nvmewqeq == NULL) {
+		atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6152 FCP Drop IO x%x: Prep\n",
+				ctxp->oxid);
+		goto aerr;
+	}
+
+	nvmewqeq->wqe_cmpl = lpfc_nvmet_xmt_fcp_op_cmp;
+	nvmewqeq->iocb_cmpl = NULL;
+	nvmewqeq->context2 = ctxp;
+	nvmewqeq->iocb_flag |=  LPFC_IO_NVMET;
+	ctxp->wqeq->hba_wqidx = rsp->hwqid;
+
+	/* For now we take hbalock */
+	spin_lock_irqsave(&phba->hbalock, iflags);
+	rc = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, nvmewqeq);
+	spin_unlock_irqrestore(&phba->hbalock, iflags);
+	if (rc == WQE_SUCCESS) {
+		ctxp->flag |= LPFC_NVMET_IO_INP;
+		return 0;
+	}
+
+	/* Give back resources */
+	atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+			"6153 FCP Drop IO x%x: Issue: %d\n",
+			ctxp->oxid, rc);
+
+	ctxp->wqeq->hba_wqidx = 0;
+	nvmewqeq->context2 = NULL;
+	nvmewqeq->context3 = NULL;
+aerr:
+	return -ENXIO;
+}
+
+static void
+lpfc_nvmet_targetport_delete(struct nvmet_fc_target_port *targetport)
+{
+	struct lpfc_nvmet_tgtport *tport = targetport->private;
+
+	/* release any threads waiting for the unreg to complete */
+	complete(&tport->tport_unreg_done);
+}
+
+static struct nvmet_fc_target_template lpfc_tgttemplate = {
+	.targetport_delete = lpfc_nvmet_targetport_delete,
+	.xmt_ls_rsp     = lpfc_nvmet_xmt_ls_rsp,
+	.fcp_op         = lpfc_nvmet_xmt_fcp_op,
+
+	.max_hw_queues  = 1,
+	.max_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
+	.max_dif_sgl_segments = LPFC_NVMET_DEFAULT_SEGS,
+	.dma_boundary = 0xFFFFFFFF,
+
+	/* optional features */
+	.target_features = 0,
+	/* sizes of additional private data for data structures */
+	.target_priv_sz = sizeof(struct lpfc_nvmet_tgtport),
+};
+
+int
+lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
+{
+	struct lpfc_vport  *vport = phba->pport;
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct nvmet_fc_port_info pinfo;
+	int error = 0;
+
+	if (phba->targetport)
+		return 0;
+
+	memset(&pinfo, 0, sizeof(struct nvmet_fc_port_info));
+	pinfo.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
+	pinfo.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
+	pinfo.port_id = vport->fc_myDID;
+
+	lpfc_tgttemplate.max_hw_queues = phba->cfg_nvme_io_channel;
+	lpfc_tgttemplate.max_sgl_segments = phba->cfg_sg_seg_cnt;
+	lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP |
+					   NVMET_FCTGTFEAT_NEEDS_CMD_CPUSCHED;
+
+	error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
+					     &phba->pcidev->dev,
+					     &phba->targetport);
+	if (error) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
+				"6025 Cannot register NVME targetport "
+				"x%x\n", error);
+		phba->targetport = NULL;
+	} else {
+		tgtp = (struct lpfc_nvmet_tgtport *)
+			phba->targetport->private;
+		tgtp->phba = phba;
+
+		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+				"6026 Registered NVME "
+				"targetport: %p, private %p "
+				"portnm %llx nodenm %llx\n",
+				phba->targetport, tgtp,
+				pinfo.port_name, pinfo.node_name);
+
+		atomic_set(&tgtp->rcv_ls_req_in, 0);
+		atomic_set(&tgtp->rcv_ls_req_out, 0);
+		atomic_set(&tgtp->rcv_ls_req_drop, 0);
+		atomic_set(&tgtp->xmt_ls_abort, 0);
+		atomic_set(&tgtp->xmt_ls_rsp, 0);
+		atomic_set(&tgtp->xmt_ls_drop, 0);
+		atomic_set(&tgtp->xmt_ls_rsp_error, 0);
+		atomic_set(&tgtp->xmt_ls_rsp_cmpl, 0);
+		atomic_set(&tgtp->rcv_fcp_cmd_in, 0);
+		atomic_set(&tgtp->rcv_fcp_cmd_out, 0);
+		atomic_set(&tgtp->rcv_fcp_cmd_drop, 0);
+		atomic_set(&tgtp->xmt_fcp_abort, 0);
+		atomic_set(&tgtp->xmt_fcp_drop, 0);
+		atomic_set(&tgtp->xmt_fcp_read_rsp, 0);
+		atomic_set(&tgtp->xmt_fcp_read, 0);
+		atomic_set(&tgtp->xmt_fcp_write, 0);
+		atomic_set(&tgtp->xmt_fcp_rsp, 0);
+		atomic_set(&tgtp->xmt_fcp_rsp_cmpl, 0);
+		atomic_set(&tgtp->xmt_fcp_rsp_error, 0);
+		atomic_set(&tgtp->xmt_fcp_rsp_drop, 0);
+		atomic_set(&tgtp->xmt_abort_rsp, 0);
+		atomic_set(&tgtp->xmt_abort_rsp_error, 0);
+		atomic_set(&tgtp->xmt_abort_cmpl, 0);
+	}
+	return error;
+}
+
+int
+lpfc_nvmet_update_targetport(struct lpfc_hba *phba)
+{
+	struct lpfc_vport  *vport = phba->pport;
+
+	if (!phba->targetport)
+		return 0;
+
+	lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
+			 "6007 Update NVMET port %p did x%x\n",
+			 phba->targetport, vport->fc_myDID);
+
+	phba->targetport->port_id = vport->fc_myDID;
+	return 0;
+}
+
+void
+lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+
+	if (phba->nvmet_support == 0)
+		return;
+	if (phba->targetport) {
+		tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+		init_completion(&tgtp->tport_unreg_done);
+		nvmet_fc_unregister_targetport(phba->targetport);
+		wait_for_completion_timeout(&tgtp->tport_unreg_done, 5);
+	}
+	phba->targetport = NULL;
+}
+
+/**
+ * lpfc_nvmet_unsol_ls_buffer - Process an unsolicited event data buffer
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
+ *
+ * This routine is used for processing the WQE associated with a unsolicited
+ * event. It first determines whether there is an existing ndlp that matches
+ * the DID from the unsolicited WQE. If not, it will create a new one with
+ * the DID from the unsolicited WQE. The ELS command from the unsolicited
+ * WQE is then used to invoke the proper routine and to set up proper state
+ * of the discovery state machine.
+ **/
+static void
+lpfc_nvmet_unsol_ls_buffer(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
+			   struct hbq_dmabuf *nvmebuf)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct fc_frame_header *fc_hdr;
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	uint32_t *payload;
+	uint32_t size, oxid, sid, rc;
+
+	if (!nvmebuf || !phba->targetport) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6154 LS Drop IO\n");
+		goto dropit;
+	}
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	payload = (uint32_t *)(nvmebuf->dbuf.virt);
+	fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
+	size = bf_get(lpfc_rcqe_length,  &nvmebuf->cq_event.cqe.rcqe_cmpl);
+	oxid = be16_to_cpu(fc_hdr->fh_ox_id);
+	sid = sli4_sid_from_fc_hdr(fc_hdr);
+
+	ctxp = kzalloc(sizeof(struct lpfc_nvmet_rcv_ctx), GFP_ATOMIC);
+	if (ctxp == NULL) {
+		atomic_inc(&tgtp->rcv_ls_req_drop);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6155 LS Drop IO x%x: Alloc\n",
+				oxid);
+dropit:
+		if (nvmebuf)
+			lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+		return;
+	}
+	ctxp->phba = phba;
+	ctxp->size = size;
+	ctxp->oxid = oxid;
+	ctxp->sid = sid;
+	ctxp->wqeq = NULL;
+	ctxp->state = LPFC_NVMET_STE_RCV;
+	ctxp->rqb_buffer = (void *)nvmebuf;
+	/*
+	 * The calling sequence should be:
+	 * nvmet_fc_rcv_ls_req -> lpfc_nvmet_xmt_ls_rsp/cmp ->_req->done
+	 * lpfc_nvmet_xmt_ls_rsp_cmp should free the allocated ctxp.
+	 */
+	atomic_inc(&tgtp->rcv_ls_req_in);
+	rc = nvmet_fc_rcv_ls_req(phba->targetport, &ctxp->ctx.ls_req,
+				 payload, size);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+			"6037 %s: ctx %p sz %d rc %d: %08x %08x %08x "
+			"%08x %08x %08x\n", __func__, ctxp, size, rc,
+			*payload, *(payload+1), *(payload+2),
+			*(payload+3), *(payload+4), *(payload+5));
+	if (rc == 0) {
+		atomic_inc(&tgtp->rcv_ls_req_out);
+		return;
+	}
+	atomic_inc(&tgtp->rcv_ls_req_drop);
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+			"6156 LS Drop IO x%x: nvmet_fc_rcv_ls_req %d\n",
+			ctxp->oxid, rc);
+
+	/* We assume a rcv'ed cmd ALWAYs fits into 1 buffer */
+	if (nvmebuf)
+		lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+
+	atomic_inc(&tgtp->xmt_ls_abort);
+	lpfc_nvmet_unsol_ls_issue_abort(phba, ctxp, sid, oxid);
+}
+
+/**
+ * lpfc_nvmet_unsol_fcp_buffer - Process an unsolicited event data buffer
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @nvmebuf: pointer to lpfc nvme command HBQ data structure.
+ *
+ * This routine is used for processing the WQE associated with a unsolicited
+ * event. It first determines whether there is an existing ndlp that matches
+ * the DID from the unsolicited WQE. If not, it will create a new one with
+ * the DID from the unsolicited WQE. The ELS command from the unsolicited
+ * WQE is then used to invoke the proper routine and to set up proper state
+ * of the discovery state machine.
+ **/
+static void
+lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
+			    struct lpfc_sli_ring *pring,
+			    struct rqb_dmabuf *nvmebuf,
+			    uint64_t isr_timestamp)
+{
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct fc_frame_header *fc_hdr;
+	uint32_t *payload;
+	uint32_t size, oxid, sid, rc;
+
+	oxid = 0;
+	if (!nvmebuf || !phba->targetport) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6157 FCP Drop IO\n");
+		goto dropit;
+	}
+
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	payload = (uint32_t *)(nvmebuf->dbuf.virt);
+	fc_hdr = (struct fc_frame_header *)(nvmebuf->hbuf.virt);
+	size = nvmebuf->bytes_recv;
+	oxid = be16_to_cpu(fc_hdr->fh_ox_id);
+	sid = sli4_sid_from_fc_hdr(fc_hdr);
+
+	ctxp = (struct lpfc_nvmet_rcv_ctx *)nvmebuf->context;
+	if (ctxp == NULL) {
+		atomic_inc(&tgtp->rcv_fcp_cmd_drop);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6158 FCP Drop IO x%x: Alloc\n",
+				oxid);
+		lpfc_nvmet_rq_post(phba, NULL, &nvmebuf->hbuf);
+		/* Cannot send ABTS without context */
+		return;
+	}
+	memset(ctxp, 0, sizeof(ctxp->ctx));
+	ctxp->wqeq = NULL;
+	ctxp->txrdy = NULL;
+	ctxp->offset = 0;
+	ctxp->phba = phba;
+	ctxp->size = size;
+	ctxp->oxid = oxid;
+	ctxp->sid = sid;
+	ctxp->state = LPFC_NVMET_STE_RCV;
+	ctxp->rqb_buffer = nvmebuf;
+	ctxp->entry_cnt = 1;
+	ctxp->flag = 0;
+
+	atomic_inc(&tgtp->rcv_fcp_cmd_in);
+	/*
+	 * The calling sequence should be:
+	 * nvmet_fc_rcv_fcp_req -> lpfc_nvmet_xmt_fcp_op/cmp -> req->done
+	 * lpfc_nvmet_xmt_fcp_op_cmp should free the allocated ctxp.
+	 */
+	rc = nvmet_fc_rcv_fcp_req(phba->targetport, &ctxp->ctx.fcp_req,
+				  payload, size);
+
+	/* Process FCP command */
+	if (rc == 0) {
+		atomic_inc(&tgtp->rcv_fcp_cmd_out);
+		return;
+	}
+
+	atomic_inc(&tgtp->rcv_fcp_cmd_drop);
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+			"6159 FCP Drop IO x%x: nvmet_fc_rcv_fcp_req x%x\n",
+			ctxp->oxid, rc);
+dropit:
+	if (oxid) {
+		lpfc_nvmet_unsol_fcp_issue_abort(phba, ctxp, sid, oxid);
+		return;
+	}
+
+	if (nvmebuf) {
+		nvmebuf->iocbq->hba_wqidx = 0;
+		/* We assume a rcv'ed cmd ALWAYs fits into 1 buffer */
+		lpfc_nvmet_rq_post(phba, NULL, &nvmebuf->hbuf);
+	}
+}
+
+/**
+ * lpfc_nvmet_unsol_ls_event - Process an unsolicited event from an nvme nport
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @nvmebuf: pointer to received nvme data structure.
+ *
+ * This routine is used to process an unsolicited event received from a SLI
+ * (Service Level Interface) ring. The actual processing of the data buffer
+ * associated with the unsolicited event is done by invoking the routine
+ * lpfc_nvmet_unsol_ls_buffer() after properly set up the buffer from the
+ * SLI RQ on which the unsolicited event was received.
+ **/
+void
+lpfc_nvmet_unsol_ls_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
+			  struct lpfc_iocbq *piocb)
+{
+	struct lpfc_dmabuf *d_buf;
+	struct hbq_dmabuf *nvmebuf;
+
+	d_buf = piocb->context2;
+	nvmebuf = container_of(d_buf, struct hbq_dmabuf, dbuf);
+
+	if (phba->nvmet_support == 0) {
+		lpfc_in_buf_free(phba, &nvmebuf->dbuf);
+		return;
+	}
+	lpfc_nvmet_unsol_ls_buffer(phba, pring, nvmebuf);
+}
+
+/**
+ * lpfc_nvmet_unsol_fcp_event - Process an unsolicited event from an nvme nport
+ * @phba: pointer to lpfc hba data structure.
+ * @pring: pointer to a SLI ring.
+ * @nvmebuf: pointer to received nvme data structure.
+ *
+ * This routine is used to process an unsolicited event received from a SLI
+ * (Service Level Interface) ring. The actual processing of the data buffer
+ * associated with the unsolicited event is done by invoking the routine
+ * lpfc_nvmet_unsol_fcp_buffer() after properly set up the buffer from the
+ * SLI RQ on which the unsolicited event was received.
+ **/
+void
+lpfc_nvmet_unsol_fcp_event(struct lpfc_hba *phba,
+			   struct lpfc_sli_ring *pring,
+			   struct rqb_dmabuf *nvmebuf,
+			   uint64_t isr_timestamp)
+{
+	if (phba->nvmet_support == 0) {
+		lpfc_nvmet_rq_post(phba, NULL, &nvmebuf->hbuf);
+		return;
+	}
+	lpfc_nvmet_unsol_fcp_buffer(phba, pring, nvmebuf,
+				    isr_timestamp);
+}
+
+/**
+ * lpfc_nvmet_prep_ls_wqe - Allocate and prepare a lpfc wqe data structure
+ * @phba: pointer to a host N_Port data structure.
+ * @ctxp: Context info for NVME LS Request
+ * @rspbuf: DMA buffer of NVME command.
+ * @rspsize: size of the NVME command.
+ *
+ * This routine is used for allocating a lpfc-WQE data structure from
+ * the driver lpfc-WQE free-list and prepare the WQE with the parameters
+ * passed into the routine for discovery state machine to issue an Extended
+ * Link Service (NVME) commands. It is a generic lpfc-WQE allocation
+ * and preparation routine that is used by all the discovery state machine
+ * routines and the NVME command-specific fields will be later set up by
+ * the individual discovery machine routines after calling this routine
+ * allocating and preparing a generic WQE data structure. It fills in the
+ * Buffer Descriptor Entries (BDEs), allocates buffers for both command
+ * payload and response payload (if expected). The reference count on the
+ * ndlp is incremented by 1 and the reference to the ndlp is put into
+ * context1 of the WQE data structure for this WQE to hold the ndlp
+ * reference for the command's callback function to access later.
+ *
+ * Return code
+ *   Pointer to the newly allocated/prepared nvme wqe data structure
+ *   NULL - when nvme wqe data structure allocation/preparation failed
+ **/
+static struct lpfc_iocbq *
+lpfc_nvmet_prep_ls_wqe(struct lpfc_hba *phba,
+		       struct lpfc_nvmet_rcv_ctx *ctxp,
+		       dma_addr_t rspbuf, uint16_t rspsize)
+{
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *nvmewqe;
+	union lpfc_wqe *wqe;
+
+	if (!lpfc_is_link_up(phba)) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
+				"6104 lpfc_nvmet_prep_ls_wqe: link err: "
+				"NPORT x%x oxid:x%x\n",
+				ctxp->sid, ctxp->oxid);
+		return NULL;
+	}
+
+	/* Allocate buffer for  command wqe */
+	nvmewqe = lpfc_sli_get_iocbq(phba);
+	if (nvmewqe == NULL) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
+				"6105 lpfc_nvmet_prep_ls_wqe: No WQE: "
+				"NPORT x%x oxid:x%x\n",
+				ctxp->sid, ctxp->oxid);
+		return NULL;
+	}
+
+	ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
+	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_DISC,
+				"6106 lpfc_nvmet_prep_ls_wqe: No ndlp: "
+				"NPORT x%x oxid:x%x\n",
+				ctxp->sid, ctxp->oxid);
+		goto nvme_wqe_free_wqeq_exit;
+	}
+	ctxp->wqeq = nvmewqe;
+
+	/* prevent preparing wqe with NULL ndlp reference */
+	nvmewqe->context1 = lpfc_nlp_get(ndlp);
+	if (nvmewqe->context1 == NULL)
+		goto nvme_wqe_free_wqeq_exit;
+	nvmewqe->context2 = ctxp;
+
+	wqe = &nvmewqe->wqe;
+	memset(wqe, 0, sizeof(union lpfc_wqe));
+
+	/* Words 0 - 2 */
+	wqe->xmit_sequence.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+	wqe->xmit_sequence.bde.tus.f.bdeSize = rspsize;
+	wqe->xmit_sequence.bde.addrLow = le32_to_cpu(putPaddrLow(rspbuf));
+	wqe->xmit_sequence.bde.addrHigh = le32_to_cpu(putPaddrHigh(rspbuf));
+
+	/* Word 3 */
+
+	/* Word 4 */
+
+	/* Word 5 */
+	bf_set(wqe_dfctl, &wqe->xmit_sequence.wge_ctl, 0);
+	bf_set(wqe_ls, &wqe->xmit_sequence.wge_ctl, 1);
+	bf_set(wqe_la, &wqe->xmit_sequence.wge_ctl, 0);
+	bf_set(wqe_rctl, &wqe->xmit_sequence.wge_ctl, FC_RCTL_DD_SOL_CTL);
+	bf_set(wqe_type, &wqe->xmit_sequence.wge_ctl, FC_TYPE_NVME);
+
+	/* Word 6 */
+	bf_set(wqe_ctxt_tag, &wqe->xmit_sequence.wqe_com,
+	       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
+	bf_set(wqe_xri_tag, &wqe->xmit_sequence.wqe_com, nvmewqe->sli4_xritag);
+
+	/* Word 7 */
+	bf_set(wqe_cmnd, &wqe->xmit_sequence.wqe_com,
+	       CMD_XMIT_SEQUENCE64_WQE);
+	bf_set(wqe_ct, &wqe->xmit_sequence.wqe_com, SLI4_CT_RPI);
+	bf_set(wqe_class, &wqe->xmit_sequence.wqe_com, CLASS3);
+	bf_set(wqe_pu, &wqe->xmit_sequence.wqe_com, 0);
+
+	/* Word 8 */
+	wqe->xmit_sequence.wqe_com.abort_tag = nvmewqe->iotag;
+
+	/* Word 9 */
+	bf_set(wqe_reqtag, &wqe->xmit_sequence.wqe_com, nvmewqe->iotag);
+	/* Needs to be set by caller */
+	bf_set(wqe_rcvoxid, &wqe->xmit_sequence.wqe_com, ctxp->oxid);
+
+	/* Word 10 */
+	bf_set(wqe_dbde, &wqe->xmit_sequence.wqe_com, 1);
+	bf_set(wqe_iod, &wqe->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
+	bf_set(wqe_lenloc, &wqe->xmit_sequence.wqe_com,
+	       LPFC_WQE_LENLOC_WORD12);
+	bf_set(wqe_ebde_cnt, &wqe->xmit_sequence.wqe_com, 0);
+
+	/* Word 11 */
+	bf_set(wqe_cqid, &wqe->xmit_sequence.wqe_com,
+	       LPFC_WQE_CQ_ID_DEFAULT);
+	bf_set(wqe_cmd_type, &wqe->xmit_sequence.wqe_com,
+	       OTHER_COMMAND);
+
+	/* Word 12 */
+	wqe->xmit_sequence.xmit_len = rspsize;
+
+	nvmewqe->retry = 1;
+	nvmewqe->vport = phba->pport;
+	nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
+	nvmewqe->iocb_flag |= LPFC_IO_NVME_LS;
+
+	/* Xmit NVME response to remote NPORT <did> */
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
+			"6039 Xmit NVME LS response to remote "
+			"NPORT x%x iotag:x%x oxid:x%x size:x%x\n",
+			ndlp->nlp_DID, nvmewqe->iotag, ctxp->oxid,
+			rspsize);
+	return nvmewqe;
+
+nvme_wqe_free_wqeq_exit:
+	nvmewqe->context2 = NULL;
+	nvmewqe->context3 = NULL;
+	lpfc_sli_release_iocbq(phba, nvmewqe);
+	return NULL;
+}
+
+
+static struct lpfc_iocbq *
+lpfc_nvmet_prep_fcp_wqe(struct lpfc_hba *phba,
+			struct lpfc_nvmet_rcv_ctx *ctxp)
+{
+	struct nvmefc_tgt_fcp_req *rsp = &ctxp->ctx.fcp_req;
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct sli4_sge *sgl;
+	struct lpfc_nodelist *ndlp;
+	struct lpfc_iocbq *nvmewqe;
+	struct scatterlist *sgel;
+	union lpfc_wqe128 *wqe;
+	uint32_t *txrdy;
+	dma_addr_t physaddr;
+	int i, cnt;
+	int xc = 1;
+
+	if (!lpfc_is_link_up(phba)) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6107 lpfc_nvmet_prep_fcp_wqe: link err:"
+				"NPORT x%x oxid:x%x\n", ctxp->sid,
+				ctxp->oxid);
+		return NULL;
+	}
+
+	ndlp = lpfc_findnode_did(phba->pport, ctxp->sid);
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
+	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	     (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6108 lpfc_nvmet_prep_fcp_wqe: no ndlp: "
+				"NPORT x%x oxid:x%x\n",
+				ctxp->sid, ctxp->oxid);
+		return NULL;
+	}
+
+	if (rsp->sg_cnt > phba->cfg_sg_seg_cnt) {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6109 lpfc_nvmet_prep_fcp_wqe: seg cnt err: "
+				"NPORT x%x oxid:x%x\n",
+				ctxp->sid, ctxp->oxid);
+		return NULL;
+	}
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	nvmewqe = ctxp->wqeq;
+	if (nvmewqe == NULL) {
+		/* Allocate buffer for  command wqe */
+		nvmewqe = ctxp->rqb_buffer->iocbq;
+		if (nvmewqe == NULL) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+					"6110 lpfc_nvmet_prep_fcp_wqe: No "
+					"WQE: NPORT x%x oxid:x%x\n",
+					ctxp->sid, ctxp->oxid);
+			return NULL;
+		}
+		ctxp->wqeq = nvmewqe;
+		xc = 0; /* create new XRI */
+		nvmewqe->sli4_lxritag = NO_XRI;
+		nvmewqe->sli4_xritag = NO_XRI;
+	}
+
+	/* Sanity check */
+	if (((ctxp->state == LPFC_NVMET_STE_RCV) &&
+	    (ctxp->entry_cnt == 1)) ||
+	    ((ctxp->state == LPFC_NVMET_STE_DATA) &&
+	    (ctxp->entry_cnt > 1))) {
+		wqe = (union lpfc_wqe128 *)&nvmewqe->wqe;
+	} else {
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+				"6111 Wrong state %s: %d  cnt %d\n",
+				__func__, ctxp->state, ctxp->entry_cnt);
+		return NULL;
+	}
+
+	sgl  = (struct sli4_sge *)ctxp->rqb_buffer->sglq->sgl;
+	switch (rsp->op) {
+	case NVMET_FCOP_READDATA:
+	case NVMET_FCOP_READDATA_RSP:
+		/* Words 0 - 2 : The first sg segment */
+		sgel = &rsp->sg[0];
+		physaddr = sg_dma_address(sgel);
+		wqe->fcp_tsend.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+		wqe->fcp_tsend.bde.tus.f.bdeSize = sg_dma_len(sgel);
+		wqe->fcp_tsend.bde.addrLow = cpu_to_le32(putPaddrLow(physaddr));
+		wqe->fcp_tsend.bde.addrHigh =
+			cpu_to_le32(putPaddrHigh(physaddr));
+
+		/* Word 3 */
+		wqe->fcp_tsend.payload_offset_len = 0;
+
+		/* Word 4 */
+		wqe->fcp_tsend.relative_offset = ctxp->offset;
+
+		/* Word 5 */
+
+		/* Word 6 */
+		bf_set(wqe_ctxt_tag, &wqe->fcp_tsend.wqe_com,
+		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
+		bf_set(wqe_xri_tag, &wqe->fcp_tsend.wqe_com,
+		       nvmewqe->sli4_xritag);
+
+		/* Word 7 */
+		bf_set(wqe_cmnd, &wqe->fcp_tsend.wqe_com, CMD_FCP_TSEND64_WQE);
+
+		/* Word 8 */
+		wqe->fcp_tsend.wqe_com.abort_tag = nvmewqe->iotag;
+
+		/* Word 9 */
+		bf_set(wqe_reqtag, &wqe->fcp_tsend.wqe_com, nvmewqe->iotag);
+		bf_set(wqe_rcvoxid, &wqe->fcp_tsend.wqe_com, ctxp->oxid);
+
+		/* Word 10 */
+		bf_set(wqe_nvme, &wqe->fcp_tsend.wqe_com, 1);
+		bf_set(wqe_dbde, &wqe->fcp_tsend.wqe_com, 1);
+		bf_set(wqe_iod, &wqe->fcp_tsend.wqe_com, LPFC_WQE_IOD_WRITE);
+		bf_set(wqe_lenloc, &wqe->fcp_tsend.wqe_com,
+		       LPFC_WQE_LENLOC_WORD12);
+		bf_set(wqe_ebde_cnt, &wqe->fcp_tsend.wqe_com, 0);
+		bf_set(wqe_xc, &wqe->fcp_tsend.wqe_com, xc);
+		bf_set(wqe_nvme, &wqe->fcp_tsend.wqe_com, 1);
+		if (phba->cfg_nvme_oas)
+			bf_set(wqe_oas, &wqe->fcp_tsend.wqe_com, 1);
+
+		/* Word 11 */
+		bf_set(wqe_cqid, &wqe->fcp_tsend.wqe_com,
+		       LPFC_WQE_CQ_ID_DEFAULT);
+		bf_set(wqe_cmd_type, &wqe->fcp_tsend.wqe_com,
+		       FCP_COMMAND_TSEND);
+
+		/* Word 12 */
+		wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
+
+		/* Setup 2 SKIP SGEs */
+		sgl->addr_hi = 0;
+		sgl->addr_lo = 0;
+		sgl->word2 = 0;
+		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
+		sgl->word2 = cpu_to_le32(sgl->word2);
+		sgl->sge_len = 0;
+		sgl++;
+		sgl->addr_hi = 0;
+		sgl->addr_lo = 0;
+		sgl->word2 = 0;
+		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
+		sgl->word2 = cpu_to_le32(sgl->word2);
+		sgl->sge_len = 0;
+		sgl++;
+		if (rsp->op == NVMET_FCOP_READDATA_RSP) {
+			atomic_inc(&tgtp->xmt_fcp_read_rsp);
+			bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 1);
+			if ((ndlp->nlp_flag & NLP_SUPPRESS_RSP) &&
+			    (rsp->rsplen == 12)) {
+				bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 1);
+				bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
+				bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
+				bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
+			} else {
+				bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
+				bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 1);
+				bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 1);
+				bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com,
+				       ((rsp->rsplen >> 2) - 1));
+				memcpy(&wqe->words[16], rsp->rspaddr,
+				       rsp->rsplen);
+			}
+		} else {
+			atomic_inc(&tgtp->xmt_fcp_read);
+
+			bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
+			bf_set(wqe_wqes, &wqe->fcp_tsend.wqe_com, 0);
+			bf_set(wqe_irsp, &wqe->fcp_tsend.wqe_com, 0);
+			bf_set(wqe_ar, &wqe->fcp_tsend.wqe_com, 0);
+			bf_set(wqe_irsplen, &wqe->fcp_tsend.wqe_com, 0);
+		}
+		ctxp->state = LPFC_NVMET_STE_DATA;
+		break;
+
+	case NVMET_FCOP_WRITEDATA:
+		/* Words 0 - 2 : The first sg segment */
+		txrdy = pci_pool_alloc(phba->txrdy_payload_pool,
+				       GFP_KERNEL, &physaddr);
+		if (!txrdy) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
+					"6041 Bad txrdy buffer: oxid x%x\n",
+					ctxp->oxid);
+			return NULL;
+		}
+		ctxp->txrdy = txrdy;
+		ctxp->txrdy_phys = physaddr;
+		wqe->fcp_treceive.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+		wqe->fcp_treceive.bde.tus.f.bdeSize = TXRDY_PAYLOAD_LEN;
+		wqe->fcp_treceive.bde.addrLow =
+			cpu_to_le32(putPaddrLow(physaddr));
+		wqe->fcp_treceive.bde.addrHigh =
+			cpu_to_le32(putPaddrHigh(physaddr));
+
+		/* Word 3 */
+		wqe->fcp_treceive.payload_offset_len = TXRDY_PAYLOAD_LEN;
+
+		/* Word 4 */
+		wqe->fcp_treceive.relative_offset = ctxp->offset;
+
+		/* Word 5 */
+
+		/* Word 6 */
+		bf_set(wqe_ctxt_tag, &wqe->fcp_treceive.wqe_com,
+		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
+		bf_set(wqe_xri_tag, &wqe->fcp_treceive.wqe_com,
+		       nvmewqe->sli4_xritag);
+
+		/* Word 7 */
+		bf_set(wqe_ar, &wqe->fcp_treceive.wqe_com, 0);
+		bf_set(wqe_cmnd, &wqe->fcp_treceive.wqe_com,
+		       CMD_FCP_TRECEIVE64_WQE);
+
+		/* Word 8 */
+		wqe->fcp_treceive.wqe_com.abort_tag = nvmewqe->iotag;
+
+		/* Word 9 */
+		bf_set(wqe_reqtag, &wqe->fcp_treceive.wqe_com, nvmewqe->iotag);
+		bf_set(wqe_rcvoxid, &wqe->fcp_treceive.wqe_com, ctxp->oxid);
+
+		/* Word 10 */
+		bf_set(wqe_nvme, &wqe->fcp_treceive.wqe_com, 1);
+		bf_set(wqe_dbde, &wqe->fcp_treceive.wqe_com, 1);
+		bf_set(wqe_iod, &wqe->fcp_treceive.wqe_com, LPFC_WQE_IOD_READ);
+		bf_set(wqe_lenloc, &wqe->fcp_treceive.wqe_com,
+		       LPFC_WQE_LENLOC_WORD12);
+		bf_set(wqe_xc, &wqe->fcp_treceive.wqe_com, xc);
+		bf_set(wqe_wqes, &wqe->fcp_treceive.wqe_com, 0);
+		bf_set(wqe_irsp, &wqe->fcp_treceive.wqe_com, 0);
+		bf_set(wqe_irsplen, &wqe->fcp_treceive.wqe_com, 0);
+		bf_set(wqe_nvme, &wqe->fcp_treceive.wqe_com, 1);
+		if (phba->cfg_nvme_oas)
+			bf_set(wqe_oas, &wqe->fcp_treceive.wqe_com, 1);
+
+		/* Word 11 */
+		bf_set(wqe_cqid, &wqe->fcp_treceive.wqe_com,
+		       LPFC_WQE_CQ_ID_DEFAULT);
+		bf_set(wqe_cmd_type, &wqe->fcp_treceive.wqe_com,
+		       FCP_COMMAND_TRECEIVE);
+		bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
+
+		/* Word 12 */
+		wqe->fcp_tsend.fcp_data_len = rsp->transfer_length;
+
+		/* Setup 1 TXRDY and 1 SKIP SGE */
+		txrdy[0] = 0;
+		txrdy[1] = cpu_to_be32(rsp->transfer_length);
+		txrdy[2] = 0;
+
+		sgl->addr_hi = putPaddrHigh(physaddr);
+		sgl->addr_lo = putPaddrLow(physaddr);
+		sgl->word2 = 0;
+		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
+		sgl->word2 = cpu_to_le32(sgl->word2);
+		sgl->sge_len = cpu_to_le32(TXRDY_PAYLOAD_LEN);
+		sgl++;
+		sgl->addr_hi = 0;
+		sgl->addr_lo = 0;
+		sgl->word2 = 0;
+		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
+		sgl->word2 = cpu_to_le32(sgl->word2);
+		sgl->sge_len = 0;
+		sgl++;
+		ctxp->state = LPFC_NVMET_STE_DATA;
+		atomic_inc(&tgtp->xmt_fcp_write);
+		break;
+
+	case NVMET_FCOP_RSP:
+		/* Words 0 - 2 */
+		sgel = &rsp->sg[0];
+		physaddr = rsp->rspdma;
+		wqe->fcp_trsp.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+		wqe->fcp_trsp.bde.tus.f.bdeSize = rsp->rsplen;
+		wqe->fcp_trsp.bde.addrLow =
+			cpu_to_le32(putPaddrLow(physaddr));
+		wqe->fcp_trsp.bde.addrHigh =
+			cpu_to_le32(putPaddrHigh(physaddr));
+
+		/* Word 3 */
+		wqe->fcp_trsp.response_len = rsp->rsplen;
+
+		/* Word 4 */
+		wqe->fcp_trsp.rsvd_4_5[0] = 0;
+
+
+		/* Word 5 */
+
+		/* Word 6 */
+		bf_set(wqe_ctxt_tag, &wqe->fcp_trsp.wqe_com,
+		       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
+		bf_set(wqe_xri_tag, &wqe->fcp_trsp.wqe_com,
+		       nvmewqe->sli4_xritag);
+
+		/* Word 7 */
+		bf_set(wqe_ag, &wqe->fcp_trsp.wqe_com, 1);
+		bf_set(wqe_cmnd, &wqe->fcp_trsp.wqe_com, CMD_FCP_TRSP64_WQE);
+
+		/* Word 8 */
+		wqe->fcp_trsp.wqe_com.abort_tag = nvmewqe->iotag;
+
+		/* Word 9 */
+		bf_set(wqe_reqtag, &wqe->fcp_trsp.wqe_com, nvmewqe->iotag);
+		bf_set(wqe_rcvoxid, &wqe->fcp_trsp.wqe_com, ctxp->oxid);
+
+		/* Word 10 */
+		bf_set(wqe_nvme, &wqe->fcp_trsp.wqe_com, 1);
+		bf_set(wqe_dbde, &wqe->fcp_trsp.wqe_com, 0);
+		bf_set(wqe_iod, &wqe->fcp_trsp.wqe_com, LPFC_WQE_IOD_WRITE);
+		bf_set(wqe_lenloc, &wqe->fcp_trsp.wqe_com,
+		       LPFC_WQE_LENLOC_WORD3);
+		bf_set(wqe_xc, &wqe->fcp_trsp.wqe_com, xc);
+		bf_set(wqe_nvme, &wqe->fcp_trsp.wqe_com, 1);
+		if (phba->cfg_nvme_oas)
+			bf_set(wqe_oas, &wqe->fcp_trsp.wqe_com, 1);
+
+		/* Word 11 */
+		bf_set(wqe_cqid, &wqe->fcp_trsp.wqe_com,
+		       LPFC_WQE_CQ_ID_DEFAULT);
+		bf_set(wqe_cmd_type, &wqe->fcp_trsp.wqe_com,
+		       FCP_COMMAND_TRSP);
+		bf_set(wqe_sup, &wqe->fcp_tsend.wqe_com, 0);
+		ctxp->state = LPFC_NVMET_STE_RSP;
+
+		if (rsp->rsplen == LPFC_NVMET_SUCCESS_LEN) {
+			/* Good response - all zero's on wire */
+			bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 0);
+			bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 0);
+			bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com, 0);
+		} else {
+			bf_set(wqe_wqes, &wqe->fcp_trsp.wqe_com, 1);
+			bf_set(wqe_irsp, &wqe->fcp_trsp.wqe_com, 1);
+			bf_set(wqe_irsplen, &wqe->fcp_trsp.wqe_com,
+			       ((rsp->rsplen >> 2) - 1));
+			memcpy(&wqe->words[16], rsp->rspaddr, rsp->rsplen);
+		}
+
+		/* Use rspbuf, NOT sg list */
+		rsp->sg_cnt = 0;
+		sgl->word2 = 0;
+		atomic_inc(&tgtp->xmt_fcp_rsp);
+		break;
+
+	default:
+		lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
+				"6064 Unknown Rsp Op %d\n",
+				rsp->op);
+		return NULL;
+	}
+
+	nvmewqe->retry = 1;
+	nvmewqe->vport = phba->pport;
+	nvmewqe->drvrTimeout = (phba->fc_ratov * 3) + LPFC_DRVR_TIMEOUT;
+	nvmewqe->context1 = ndlp;
+
+	for (i = 0; i < rsp->sg_cnt; i++) {
+		sgel = &rsp->sg[i];
+		physaddr = sg_dma_address(sgel);
+		cnt = sg_dma_len(sgel);
+		sgl->addr_hi = putPaddrHigh(physaddr);
+		sgl->addr_lo = putPaddrLow(physaddr);
+		sgl->word2 = 0;
+		bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DATA);
+		bf_set(lpfc_sli4_sge_offset, sgl, ctxp->offset);
+		if ((i+1) == rsp->sg_cnt)
+			bf_set(lpfc_sli4_sge_last, sgl, 1);
+		sgl->word2 = cpu_to_le32(sgl->word2);
+		sgl->sge_len = cpu_to_le32(cnt);
+		sgl++;
+		ctxp->offset += cnt;
+	}
+	return nvmewqe;
+}
+
+/**
+ * lpfc_nvmet_sol_fcp_abort_cmp - Completion handler for ABTS
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. This function is the completion handler for NVME ABTS for FCP cmds
+ * The function frees memory resources used for the NVME commands.
+ **/
+static void
+lpfc_nvmet_sol_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+			     struct lpfc_wcqe_complete *wcqe)
+{
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	struct lpfc_nvmet_tgtport *tgtp;
+	uint32_t status, result;
+
+	ctxp = cmdwqe->context2;
+	status = bf_get(lpfc_wcqe_c_status, wcqe);
+	result = wcqe->parameter;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	atomic_inc(&tgtp->xmt_abort_cmpl);
+
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_ABTS,
+			"6165 Abort cmpl: xri x%x WCQE: %08x %08x %08x %08x\n",
+			ctxp->oxid, wcqe->word0, wcqe->total_data_placed,
+			result, wcqe->word3);
+
+	ctxp->state = LPFC_NVMET_STE_DONE;
+	lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+
+	cmdwqe->context2 = NULL;
+	cmdwqe->context3 = NULL;
+	lpfc_sli_release_iocbq(phba, cmdwqe);
+}
+
+/**
+ * lpfc_nvmet_xmt_fcp_abort_cmp - Completion handler for ABTS
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. This function is the completion handler for NVME ABTS for FCP cmds
+ * The function frees memory resources used for the NVME commands.
+ **/
+static void
+lpfc_nvmet_xmt_fcp_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+			     struct lpfc_wcqe_complete *wcqe)
+{
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	struct lpfc_nvmet_tgtport *tgtp;
+	uint32_t status, result;
+
+	ctxp = cmdwqe->context2;
+	status = bf_get(lpfc_wcqe_c_status, wcqe);
+	result = wcqe->parameter;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	atomic_inc(&tgtp->xmt_abort_cmpl);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+			"6070 Abort cmpl: ctx %p WCQE: %08x %08x %08x %08x\n",
+			ctxp, wcqe->word0, wcqe->total_data_placed,
+			result, wcqe->word3);
+
+	if (ctxp) {
+		/* Sanity check */
+		if (ctxp->state != LPFC_NVMET_STE_ABORT) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_NVME_ABTS,
+					"6112 ABORT Wrong state:%d oxid x%x\n",
+					ctxp->state, ctxp->oxid);
+		}
+		ctxp->state = LPFC_NVMET_STE_DONE;
+		lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+		cmdwqe->context2 = NULL;
+		cmdwqe->context3 = NULL;
+	}
+}
+
+/**
+ * lpfc_nvmet_xmt_ls_abort_cmp - Completion handler for ABTS
+ * @phba: Pointer to HBA context object.
+ * @cmdwqe: Pointer to driver command WQE object.
+ * @wcqe: Pointer to driver response CQE object.
+ *
+ * The function is called from SLI ring event handler with no
+ * lock held. This function is the completion handler for NVME ABTS for LS cmds
+ * The function frees memory resources used for the NVME commands.
+ **/
+static void
+lpfc_nvmet_xmt_ls_abort_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
+			    struct lpfc_wcqe_complete *wcqe)
+{
+	struct lpfc_nvmet_rcv_ctx *ctxp;
+	struct lpfc_nvmet_tgtport *tgtp;
+	uint32_t status, result;
+
+	ctxp = cmdwqe->context2;
+	status = bf_get(lpfc_wcqe_c_status, wcqe);
+	result = wcqe->parameter;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	atomic_inc(&tgtp->xmt_abort_cmpl);
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+			"6083 Abort cmpl: ctx %p WCQE: %08x %08x %08x %08x\n",
+			ctxp, wcqe->word0, wcqe->total_data_placed,
+			result, wcqe->word3);
+
+	if (ctxp) {
+		cmdwqe->context2 = NULL;
+		cmdwqe->context3 = NULL;
+		lpfc_sli_release_iocbq(phba, cmdwqe);
+		kfree(ctxp);
+	} else
+		lpfc_sli_release_iocbq(phba, cmdwqe);
+}
+
+static int
+lpfc_nvmet_unsol_issue_abort(struct lpfc_hba *phba,
+			     struct lpfc_nvmet_rcv_ctx *ctxp,
+			     uint32_t sid, uint16_t xri)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct lpfc_iocbq *abts_wqeq;
+	union lpfc_wqe *wqe_abts;
+	struct lpfc_nodelist *ndlp;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+			"6067 %s: Entrypoint: sid %x xri %x\n", __func__,
+			sid, xri);
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+
+	ndlp = lpfc_findnode_did(phba->pport, sid);
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
+	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
+		atomic_inc(&tgtp->xmt_abort_rsp_error);
+		lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+				"6134 Drop ABTS - wrong NDLP state x%x.\n",
+				ndlp->nlp_state);
+
+		/* No failure to an ABTS request. */
+		return 0;
+	}
+
+	abts_wqeq = ctxp->wqeq;
+	wqe_abts = &abts_wqeq->wqe;
+	ctxp->state = LPFC_NVMET_STE_ABORT;
+
+	/*
+	 * Since we zero the whole WQE, we need to ensure we set the WQE fields
+	 * that were initialized in lpfc_sli4_nvmet_alloc.
+	 */
+	memset(wqe_abts, 0, sizeof(union lpfc_wqe));
+
+	/* Word 5 */
+	bf_set(wqe_dfctl, &wqe_abts->xmit_sequence.wge_ctl, 0);
+	bf_set(wqe_ls, &wqe_abts->xmit_sequence.wge_ctl, 1);
+	bf_set(wqe_la, &wqe_abts->xmit_sequence.wge_ctl, 0);
+	bf_set(wqe_rctl, &wqe_abts->xmit_sequence.wge_ctl, FC_RCTL_BA_ABTS);
+	bf_set(wqe_type, &wqe_abts->xmit_sequence.wge_ctl, FC_TYPE_BLS);
+
+	/* Word 6 */
+	bf_set(wqe_ctxt_tag, &wqe_abts->xmit_sequence.wqe_com,
+	       phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
+	bf_set(wqe_xri_tag, &wqe_abts->xmit_sequence.wqe_com,
+	       abts_wqeq->sli4_xritag);
+
+	/* Word 7 */
+	bf_set(wqe_cmnd, &wqe_abts->xmit_sequence.wqe_com,
+	       CMD_XMIT_SEQUENCE64_WQE);
+	bf_set(wqe_ct, &wqe_abts->xmit_sequence.wqe_com, SLI4_CT_RPI);
+	bf_set(wqe_class, &wqe_abts->xmit_sequence.wqe_com, CLASS3);
+	bf_set(wqe_pu, &wqe_abts->xmit_sequence.wqe_com, 0);
+
+	/* Word 8 */
+	wqe_abts->xmit_sequence.wqe_com.abort_tag = abts_wqeq->iotag;
+
+	/* Word 9 */
+	bf_set(wqe_reqtag, &wqe_abts->xmit_sequence.wqe_com, abts_wqeq->iotag);
+	/* Needs to be set by caller */
+	bf_set(wqe_rcvoxid, &wqe_abts->xmit_sequence.wqe_com, xri);
+
+	/* Word 10 */
+	bf_set(wqe_dbde, &wqe_abts->xmit_sequence.wqe_com, 1);
+	bf_set(wqe_iod, &wqe_abts->xmit_sequence.wqe_com, LPFC_WQE_IOD_WRITE);
+	bf_set(wqe_lenloc, &wqe_abts->xmit_sequence.wqe_com,
+	       LPFC_WQE_LENLOC_WORD12);
+	bf_set(wqe_ebde_cnt, &wqe_abts->xmit_sequence.wqe_com, 0);
+	bf_set(wqe_qosd, &wqe_abts->xmit_sequence.wqe_com, 0);
+
+	/* Word 11 */
+	bf_set(wqe_cqid, &wqe_abts->xmit_sequence.wqe_com,
+	       LPFC_WQE_CQ_ID_DEFAULT);
+	bf_set(wqe_cmd_type, &wqe_abts->xmit_sequence.wqe_com,
+	       OTHER_COMMAND);
+
+	abts_wqeq->vport = phba->pport;
+	abts_wqeq->context1 = ndlp;
+	abts_wqeq->context2 = ctxp;
+	abts_wqeq->context3 = NULL;
+	abts_wqeq->rsvd2 = 0;
+	/* hba_wqidx should already be setup from command we are aborting */
+	abts_wqeq->iocb.ulpCommand = CMD_XMIT_SEQUENCE64_CR;
+	abts_wqeq->iocb.ulpLe = 1;
+
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
+			"6069 Issue ABTS to xri x%x reqtag x%x\n",
+			xri, abts_wqeq->iotag);
+	return 1;
+}
+
+static int
+lpfc_nvmet_sol_fcp_issue_abort(struct lpfc_hba *phba,
+			       struct lpfc_nvmet_rcv_ctx *ctxp,
+			       uint32_t sid, uint16_t xri)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct lpfc_iocbq *abts_wqeq;
+	union lpfc_wqe *abts_wqe;
+	struct lpfc_nodelist *ndlp;
+	unsigned long flags;
+	int rc;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	if (!ctxp->wqeq) {
+		ctxp->wqeq = ctxp->rqb_buffer->iocbq;
+		ctxp->wqeq->hba_wqidx = 0;
+	}
+
+	ndlp = lpfc_findnode_did(phba->pport, sid);
+	if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
+	    ((ndlp->nlp_state != NLP_STE_UNMAPPED_NODE) &&
+	    (ndlp->nlp_state != NLP_STE_MAPPED_NODE))) {
+		atomic_inc(&tgtp->xmt_abort_rsp_error);
+		lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+				"6160 Drop ABTS - wrong NDLP state x%x.\n",
+				ndlp->nlp_state);
+
+		/* No failure to an ABTS request. */
+		return 0;
+	}
+
+	/* Issue ABTS for this WQE based on iotag */
+	ctxp->abort_wqeq = lpfc_sli_get_iocbq(phba);
+	if (!ctxp->abort_wqeq) {
+		lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+				"6161 Abort failed: No wqeqs: "
+				"xri: x%x\n", ctxp->oxid);
+		/* No failure to an ABTS request. */
+		return 0;
+	}
+	abts_wqeq = ctxp->abort_wqeq;
+	abts_wqe = &abts_wqeq->wqe;
+	ctxp->state = LPFC_NVMET_STE_ABORT;
+
+	/* Announce entry to new IO submit field. */
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME_ABTS,
+			"6162 Abort Request to rport DID x%06x "
+			"for xri x%x x%x\n",
+			ctxp->sid, ctxp->oxid, ctxp->wqeq->sli4_xritag);
+
+	/* If the hba is getting reset, this flag is set.  It is
+	 * cleared when the reset is complete and rings reestablished.
+	 */
+	spin_lock_irqsave(&phba->hbalock, flags);
+	/* driver queued commands are in process of being flushed */
+	if (phba->hba_flag & HBA_NVME_IOQ_FLUSH) {
+		spin_unlock_irqrestore(&phba->hbalock, flags);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+				"6163 Driver in reset cleanup - flushing "
+				"NVME Req now. hba_flag x%x oxid x%x\n",
+				phba->hba_flag, ctxp->oxid);
+		lpfc_sli_release_iocbq(phba, abts_wqeq);
+		return 0;
+	}
+
+	/* Outstanding abort is in progress */
+	if (abts_wqeq->iocb_flag & LPFC_DRIVER_ABORTED) {
+		spin_unlock_irqrestore(&phba->hbalock, flags);
+		lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+				"6164 Outstanding NVME I/O Abort Request "
+				"still pending on oxid x%x\n",
+				ctxp->oxid);
+		lpfc_sli_release_iocbq(phba, abts_wqeq);
+		return 0;
+	}
+
+	/* Ready - mark outstanding as aborted by driver. */
+	abts_wqeq->iocb_flag |= LPFC_DRIVER_ABORTED;
+
+	/* WQEs are reused.  Clear stale data and set key fields to
+	 * zero like ia, iaab, iaar, xri_tag, and ctxt_tag.
+	 */
+	memset(abts_wqe, 0, sizeof(union lpfc_wqe));
+
+	/* word 3 */
+	bf_set(abort_cmd_criteria, &abts_wqe->abort_cmd, T_XRI_TAG);
+
+	/* word 7 */
+	bf_set(wqe_ct, &abts_wqe->abort_cmd.wqe_com, 0);
+	bf_set(wqe_cmnd, &abts_wqe->abort_cmd.wqe_com, CMD_ABORT_XRI_CX);
+
+	/* word 8 - tell the FW to abort the IO associated with this
+	 * outstanding exchange ID.
+	 */
+	abts_wqe->abort_cmd.wqe_com.abort_tag = ctxp->wqeq->sli4_xritag;
+
+	/* word 9 - this is the iotag for the abts_wqe completion. */
+	bf_set(wqe_reqtag, &abts_wqe->abort_cmd.wqe_com,
+	       abts_wqeq->iotag);
+
+	/* word 10 */
+	bf_set(wqe_qosd, &abts_wqe->abort_cmd.wqe_com, 1);
+	bf_set(wqe_lenloc, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_LENLOC_NONE);
+
+	/* word 11 */
+	bf_set(wqe_cmd_type, &abts_wqe->abort_cmd.wqe_com, OTHER_COMMAND);
+	bf_set(wqe_wqec, &abts_wqe->abort_cmd.wqe_com, 1);
+	bf_set(wqe_cqid, &abts_wqe->abort_cmd.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
+
+	/* ABTS WQE must go to the same WQ as the WQE to be aborted */
+	abts_wqeq->hba_wqidx = ctxp->wqeq->hba_wqidx;
+	abts_wqeq->wqe_cmpl = lpfc_nvmet_sol_fcp_abort_cmp;
+	abts_wqeq->iocb_cmpl = 0;
+	abts_wqeq->iocb_flag |= LPFC_IO_NVME;
+	abts_wqeq->context2 = ctxp;
+	rc = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_wqeq);
+	spin_unlock_irqrestore(&phba->hbalock, flags);
+	if (rc == WQE_SUCCESS)
+		return 0;
+
+	lpfc_sli_release_iocbq(phba, abts_wqeq);
+	lpfc_printf_log(phba, KERN_ERR, LOG_NVME,
+			"6166 Failed abts issue_wqe with status x%x "
+			"for oxid x%x.\n",
+			rc, ctxp->oxid);
+	return 1;
+}
+
+
+static int
+lpfc_nvmet_unsol_fcp_issue_abort(struct lpfc_hba *phba,
+				 struct lpfc_nvmet_rcv_ctx *ctxp,
+				 uint32_t sid, uint16_t xri)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct lpfc_iocbq *abts_wqeq;
+	unsigned long flags;
+	int rc;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	if (!ctxp->wqeq) {
+		ctxp->wqeq = ctxp->rqb_buffer->iocbq;
+		ctxp->wqeq->hba_wqidx = 0;
+	}
+
+	rc = lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
+	if (rc == 0)
+		goto aerr;
+
+	spin_lock_irqsave(&phba->hbalock, flags);
+	abts_wqeq = ctxp->wqeq;
+	abts_wqeq->wqe_cmpl = lpfc_nvmet_xmt_fcp_abort_cmp;
+	abts_wqeq->iocb_cmpl = 0;
+	abts_wqeq->iocb_flag |= LPFC_IO_NVMET;
+	rc = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, abts_wqeq);
+	spin_unlock_irqrestore(&phba->hbalock, flags);
+	if (rc == WQE_SUCCESS) {
+		atomic_inc(&tgtp->xmt_abort_rsp);
+		return 0;
+	}
+
+aerr:
+	lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
+	atomic_inc(&tgtp->xmt_abort_rsp_error);
+	lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+			"6135 Failed to Issue ABTS for oxid x%x. Status x%x\n",
+			ctxp->oxid, rc);
+	return 1;
+}
+
+static int
+lpfc_nvmet_unsol_ls_issue_abort(struct lpfc_hba *phba,
+				struct lpfc_nvmet_rcv_ctx *ctxp,
+				uint32_t sid, uint16_t xri)
+{
+	struct lpfc_nvmet_tgtport *tgtp;
+	struct lpfc_iocbq *abts_wqeq;
+	union lpfc_wqe *wqe_abts;
+	unsigned long flags;
+	int rc;
+
+	tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
+	if (!ctxp->wqeq) {
+		/* Issue ABTS for this WQE based on iotag */
+		ctxp->wqeq = lpfc_sli_get_iocbq(phba);
+		if (!ctxp->wqeq) {
+			lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+					"6068 Abort failed: No wqeqs: "
+					"xri: x%x\n", xri);
+			/* No failure to an ABTS request. */
+			kfree(ctxp);
+			return 0;
+		}
+	}
+	abts_wqeq = ctxp->wqeq;
+	wqe_abts = &abts_wqeq->wqe;
+	lpfc_nvmet_unsol_issue_abort(phba, ctxp, sid, xri);
+
+	spin_lock_irqsave(&phba->hbalock, flags);
+	abts_wqeq->wqe_cmpl = lpfc_nvmet_xmt_ls_abort_cmp;
+	abts_wqeq->iocb_cmpl = 0;
+	abts_wqeq->iocb_flag |=  LPFC_IO_NVME_LS;
+	rc = lpfc_sli4_issue_wqe(phba, LPFC_ELS_RING, abts_wqeq);
+	spin_unlock_irqrestore(&phba->hbalock, flags);
+	if (rc == WQE_SUCCESS) {
+		atomic_inc(&tgtp->xmt_abort_rsp);
+		return 0;
+	}
+
+	atomic_inc(&tgtp->xmt_abort_rsp_error);
+	abts_wqeq->context2 = NULL;
+	abts_wqeq->context3 = NULL;
+	lpfc_sli_release_iocbq(phba, abts_wqeq);
+	kfree(ctxp);
+	lpfc_printf_log(phba, KERN_WARNING, LOG_NVME_ABTS,
+			"6056 Failed to Issue ABTS. Status x%x\n", rc);
+	return 0;
+}

drivers/scsi/lpfc/lpfc_sli.c

@@ -2518,7 +2518,7 @@ lpfc_complete_unsol_iocb(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
 
 	switch (fch_type) {
 	case FC_TYPE_NVME:
-		/* todo: tgt: forward NVME LS to transport */
+		lpfc_nvmet_unsol_ls_event(phba, pring, saveq);
 		return 1;
 	default:
 		break;
@@ -6867,7 +6867,7 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
 			goto out_destroy_queue;
 		}
 		phba->sli4_hba.nvmet_xri_cnt = rc;
-		/* todo: tgt: create targetport */
+		lpfc_nvmet_create_targetport(phba);
 	} else {
 		/* update host scsi xri-sgl sizes and mappings */
 		rc = lpfc_sli4_scsi_sgl_update(phba);
@@ -13137,7 +13137,9 @@ lpfc_sli4_nvmet_handle_rcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
 
 		if (fc_hdr->fh_type == FC_TYPE_FCP) {
 			dma_buf->bytes_recv = bf_get(lpfc_rcqe_length,  rcqe);
-			/* todo: tgt: forward cmd iu to transport */
+			lpfc_nvmet_unsol_fcp_event(
+				phba, phba->sli4_hba.els_wq->pring, dma_buf,
+				cq->assoc_qp->isr_timestamp);
 			return false;
 		}
 drop: