linux/drivers/scsi/lpfc/lpfc_nvmet.c

/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
 * Fibre Channsel Host Bus Adapters.                               *
 * Copyright (C) 2017 Broadcom. All Rights Reserved. The term      *
 * “Broadcom” refers to Broadcom Limited and/or its subsidiaries.  *
 * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
 * EMULEX and SLI are trademarks of Emulex.                        *
 * www.broadcom.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"
#include "lpfc_debugfs.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_nvmeio_data(phba, "NVMET LS  CMPL: xri x%x stat x%x result x%x\n",
			 ctxp->oxid, status, result);

	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);
}

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
static void
lpfc_nvmet_ktime(struct lpfc_hba *phba,
		 struct lpfc_nvmet_rcv_ctx *ctxp)
{
	uint64_t seg1, seg2, seg3, seg4, seg5;
	uint64_t seg6, seg7, seg8, seg9, seg10;

	if (!phba->ktime_on)
		return;

	if (!ctxp->ts_isr_cmd || !ctxp->ts_cmd_nvme ||
	    !ctxp->ts_nvme_data || !ctxp->ts_data_wqput ||
	    !ctxp->ts_isr_data || !ctxp->ts_data_nvme ||
	    !ctxp->ts_nvme_status || !ctxp->ts_status_wqput ||
	    !ctxp->ts_isr_status || !ctxp->ts_status_nvme)
		return;

	if (ctxp->ts_isr_cmd  > ctxp->ts_cmd_nvme)
		return;
	if (ctxp->ts_cmd_nvme > ctxp->ts_nvme_data)
		return;
	if (ctxp->ts_nvme_data > ctxp->ts_data_wqput)
		return;
	if (ctxp->ts_data_wqput > ctxp->ts_isr_data)
		return;
	if (ctxp->ts_isr_data > ctxp->ts_data_nvme)
		return;
	if (ctxp->ts_data_nvme > ctxp->ts_nvme_status)
		return;
	if (ctxp->ts_nvme_status > ctxp->ts_status_wqput)
		return;
	if (ctxp->ts_status_wqput > ctxp->ts_isr_status)
		return;
	if (ctxp->ts_isr_status > ctxp->ts_status_nvme)
		return;
	/*
	 * Segment 1 - Time from FCP command received by MSI-X ISR
	 * to FCP command is passed to NVME Layer.
	 * Segment 2 - Time from FCP command payload handed
	 * off to NVME Layer to Driver receives a Command op
	 * from NVME Layer.
	 * Segment 3 - Time from Driver receives a Command op
	 * from NVME Layer to Command is put on WQ.
	 * Segment 4 - Time from Driver WQ put is done
	 * to MSI-X ISR for Command cmpl.
	 * Segment 5 - Time from MSI-X ISR for Command cmpl to
	 * Command cmpl is passed to NVME Layer.
	 * Segment 6 - Time from Command cmpl is passed to NVME
	 * Layer to Driver receives a RSP op from NVME Layer.
	 * Segment 7 - Time from Driver receives a RSP op from
	 * NVME Layer to WQ put is done on TRSP FCP Status.
	 * Segment 8 - Time from Driver WQ put is done on TRSP
	 * FCP Status to MSI-X ISR for TRSP cmpl.
	 * Segment 9 - Time from MSI-X ISR for TRSP cmpl to
	 * TRSP cmpl is passed to NVME Layer.
	 * Segment 10 - Time from FCP command received by
	 * MSI-X ISR to command is completed on wire.
	 * (Segments 1 thru 8) for READDATA / WRITEDATA
	 * (Segments 1 thru 4) for READDATA_RSP
	 */
	seg1 = ctxp->ts_cmd_nvme - ctxp->ts_isr_cmd;
	seg2 = (ctxp->ts_nvme_data - ctxp->ts_isr_cmd) - seg1;
	seg3 = (ctxp->ts_data_wqput - ctxp->ts_isr_cmd) -
		seg1 - seg2;
	seg4 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd) -
		seg1 - seg2 - seg3;
	seg5 = (ctxp->ts_data_nvme - ctxp->ts_isr_cmd) -
		seg1 - seg2 - seg3 - seg4;

	/* For auto rsp commands seg6 thru seg10 will be 0 */
	if (ctxp->ts_nvme_status > ctxp->ts_data_nvme) {
		seg6 = (ctxp->ts_nvme_status -
			ctxp->ts_isr_cmd) -
			seg1 - seg2 - seg3 - seg4 - seg5;
		seg7 = (ctxp->ts_status_wqput -
			ctxp->ts_isr_cmd) -
			seg1 - seg2 - seg3 -
			seg4 - seg5 - seg6;
		seg8 = (ctxp->ts_isr_status -
			ctxp->ts_isr_cmd) -
			seg1 - seg2 - seg3 - seg4 -
			seg5 - seg6 - seg7;
		seg9 = (ctxp->ts_status_nvme -
			ctxp->ts_isr_cmd) -
			seg1 - seg2 - seg3 - seg4 -
			seg5 - seg6 - seg7 - seg8;
		seg10 = (ctxp->ts_isr_status -
			ctxp->ts_isr_cmd);
	} else {
		seg6 =  0;
		seg7 =  0;
		seg8 =  0;
		seg9 =  0;
		seg10 = (ctxp->ts_isr_data - ctxp->ts_isr_cmd);
	}

	phba->ktime_seg1_total += seg1;
	if (seg1 < phba->ktime_seg1_min)
		phba->ktime_seg1_min = seg1;
	else if (seg1 > phba->ktime_seg1_max)
		phba->ktime_seg1_max = seg1;

	phba->ktime_seg2_total += seg2;
	if (seg2 < phba->ktime_seg2_min)
		phba->ktime_seg2_min = seg2;
	else if (seg2 > phba->ktime_seg2_max)
		phba->ktime_seg2_max = seg2;

	phba->ktime_seg3_total += seg3;
	if (seg3 < phba->ktime_seg3_min)
		phba->ktime_seg3_min = seg3;
	else if (seg3 > phba->ktime_seg3_max)
		phba->ktime_seg3_max = seg3;

	phba->ktime_seg4_total += seg4;
	if (seg4 < phba->ktime_seg4_min)
		phba->ktime_seg4_min = seg4;
	else if (seg4 > phba->ktime_seg4_max)
		phba->ktime_seg4_max = seg4;

	phba->ktime_seg5_total += seg5;
	if (seg5 < phba->ktime_seg5_min)
		phba->ktime_seg5_min = seg5;
	else if (seg5 > phba->ktime_seg5_max)
		phba->ktime_seg5_max = seg5;

	phba->ktime_data_samples++;
	if (!seg6)
		goto out;

	phba->ktime_seg6_total += seg6;
	if (seg6 < phba->ktime_seg6_min)
		phba->ktime_seg6_min = seg6;
	else if (seg6 > phba->ktime_seg6_max)
		phba->ktime_seg6_max = seg6;

	phba->ktime_seg7_total += seg7;
	if (seg7 < phba->ktime_seg7_min)
		phba->ktime_seg7_min = seg7;
	else if (seg7 > phba->ktime_seg7_max)
		phba->ktime_seg7_max = seg7;

	phba->ktime_seg8_total += seg8;
	if (seg8 < phba->ktime_seg8_min)
		phba->ktime_seg8_min = seg8;
	else if (seg8 > phba->ktime_seg8_max)
		phba->ktime_seg8_max = seg8;

	phba->ktime_seg9_total += seg9;
	if (seg9 < phba->ktime_seg9_min)
		phba->ktime_seg9_min = seg9;
	else if (seg9 > phba->ktime_seg9_max)
		phba->ktime_seg9_max = seg9;
out:
	phba->ktime_seg10_total += seg10;
	if (seg10 < phba->ktime_seg10_min)
		phba->ktime_seg10_min = seg10;
	else if (seg10 > phba->ktime_seg10_max)
		phba->ktime_seg10_max = seg10;
	phba->ktime_status_samples++;
}
#endif

/**
 * 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;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	uint32_t id;
#endif

	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;

	lpfc_nvmeio_data(phba, "NVMET FCP CMPL: xri x%x op x%x status x%x\n",
			 ctxp->oxid, op, status);

	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++;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
		if (phba->ktime_on) {
			if (rsp->op == NVMET_FCOP_READDATA_RSP) {
				ctxp->ts_isr_data =
					cmdwqe->isr_timestamp;
				ctxp->ts_data_nvme =
					ktime_get_ns();
				ctxp->ts_nvme_status =
					ctxp->ts_data_nvme;
				ctxp->ts_status_wqput =
					ctxp->ts_data_nvme;
				ctxp->ts_isr_status =
					ctxp->ts_data_nvme;
				ctxp->ts_status_nvme =
					ctxp->ts_data_nvme;
			} else {
				ctxp->ts_isr_status =
					cmdwqe->isr_timestamp;
				ctxp->ts_status_nvme =
					ktime_get_ns();
			}
		}
		if (phba->cpucheck_on & LPFC_CHECK_NVMET_IO) {
			id = smp_processor_id();
			if (ctxp->cpu != id)
				lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
						"6703 CPU Check cmpl: "
						"cpu %d expect %d\n",
						id, ctxp->cpu);
			if (ctxp->cpu < LPFC_CHECK_CPU_CNT)
				phba->cpucheck_cmpl_io[id]++;
		}
#endif
		rsp->done(rsp);
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
		if (phba->ktime_on)
			lpfc_nvmet_ktime(phba, ctxp);
#endif
		/* lpfc_nvmet_xmt_fcp_release() will recycle the context */
	} else {
		ctxp->entry_cnt++;
		start_clean = offsetof(struct lpfc_iocbq, wqe);
		memset(((char *)cmdwqe) + start_clean, 0,
		       (sizeof(struct lpfc_iocbq) - start_clean));
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
		if (phba->ktime_on) {
			ctxp->ts_isr_data = cmdwqe->isr_timestamp;
			ctxp->ts_data_nvme = ktime_get_ns();
		}
		if (phba->cpucheck_on & LPFC_CHECK_NVMET_IO) {
			id = smp_processor_id();
			if (ctxp->cpu != id)
				lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
						"6704 CPU Check cmdcmpl: "
						"cpu %d expect %d\n",
						id, ctxp->cpu);
			if (ctxp->cpu < LPFC_CHECK_CPU_CNT)
				phba->cpucheck_ccmpl_io[id]++;
		}
#endif
		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;

	lpfc_nvmeio_data(phba, "NVMET LS  RESP: xri x%x wqidx x%x len x%x\n",
			 ctxp->oxid, nvmewqeq->hba_wqidx, rsp->rsplen);

	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;
	int rc, id;

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (phba->ktime_on) {
		if (rsp->op == NVMET_FCOP_RSP)
			ctxp->ts_nvme_status = ktime_get_ns();
		else
			ctxp->ts_nvme_data = ktime_get_ns();
	}
	if (phba->cpucheck_on & LPFC_CHECK_NVMET_IO) {
		id = smp_processor_id();
		ctxp->cpu = id;
		if (id < LPFC_CHECK_CPU_CNT)
			phba->cpucheck_xmt_io[id]++;
		if (rsp->hwqid != id) {
			lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
					"6705 CPU Check OP: "
					"cpu %d expect %d\n",
					id, rsp->hwqid);
			ctxp->cpu = rsp->hwqid;
		}
	}
#endif

	/* 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);
		rc = -ENXIO;
		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);
		rc = -ENXIO;
		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;

	lpfc_nvmeio_data(phba, "NVMET FCP CMND: xri x%x op x%x len x%x\n",
			 ctxp->oxid, rsp->op, rsp->rsplen);

	rc = lpfc_sli4_issue_wqe(phba, LPFC_FCP_RING, nvmewqeq);
	if (rc == WQE_SUCCESS) {
		ctxp->flag |= LPFC_NVMET_IO_INP;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
		if (!phba->ktime_on)
			return 0;
		if (rsp->op == NVMET_FCOP_RSP)
			ctxp->ts_status_wqput = ktime_get_ns();
		else
			ctxp->ts_data_wqput = ktime_get_ns();
#endif
		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;
	rc = -EBUSY;
aerr:
	return rc;
}

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 void
lpfc_nvmet_xmt_fcp_abort(struct nvmet_fc_target_port *tgtport,
			 struct nvmefc_tgt_fcp_req *req)
{
	struct lpfc_nvmet_tgtport *lpfc_nvmep = tgtport->private;
	struct lpfc_nvmet_rcv_ctx *ctxp =
		container_of(req, struct lpfc_nvmet_rcv_ctx, ctx.fcp_req);
	struct lpfc_hba *phba = ctxp->phba;

	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);

	lpfc_nvmeio_data(phba, "NVMET FCP ABRT: xri x%x state x%x cnt x%x\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);
}

static void
lpfc_nvmet_xmt_fcp_release(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;
	unsigned long flags;
	bool aborting = false;

	spin_lock_irqsave(&ctxp->ctxlock, flags);
	if (ctxp->flag & LPFC_NVMET_ABORT_OP) {
		aborting = true;
		ctxp->flag |= LPFC_NVMET_CTX_RLS;
	}
	spin_unlock_irqrestore(&ctxp->ctxlock, flags);

	if (aborting)
		/* let the abort path do the real release */
		return;

	/* Sanity check */
	if (ctxp->state != LPFC_NVMET_STE_DONE) {
		atomic_inc(&lpfc_nvmep->xmt_fcp_drop);
		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
				"6117 Bad state IO x%x aborted\n",
				ctxp->oxid);
	}

	lpfc_nvmeio_data(phba, "NVMET FCP FREE: xri x%x ste %d\n", ctxp->oxid,
			 ctxp->state, 0);

	lpfc_nvmet_rq_post(phba, ctxp, &ctxp->rqb_buffer->hbuf);
}

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,
	.fcp_abort      = lpfc_nvmet_xmt_fcp_abort,
	.fcp_req_release = lpfc_nvmet_xmt_fcp_release,

	.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 + 1;
	lpfc_tgttemplate.target_features = NVMET_FCTGTFEAT_READDATA_RSP |
					   NVMET_FCTGTFEAT_NEEDS_CMD_CPUSCHED |
					   NVMET_FCTGTFEAT_CMD_IN_ISR |
					   NVMET_FCTGTFEAT_OPDONE_IN_ISR;

#if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
	error = nvmet_fc_register_targetport(&pinfo, &lpfc_tgttemplate,
					     &phba->pcidev->dev,
					     &phba->targetport);
#else
	error = -ENOMEM;
#endif
	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;
}

/**
 * lpfc_sli4_nvmet_xri_aborted - Fast-path process of nvmet xri abort
 * @phba: pointer to lpfc hba data structure.
 * @axri: pointer to the nvmet xri abort wcqe structure.
 *
 * This routine is invoked by the worker thread to process a SLI4 fast-path
 * NVMET aborted xri.
 **/
void
lpfc_sli4_nvmet_xri_aborted(struct lpfc_hba *phba,
			    struct sli4_wcqe_xri_aborted *axri)
{
	/* TODO: work in progress */
}

void
lpfc_nvmet_destroy_targetport(struct lpfc_hba *phba)
{
#if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
	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;
#endif
}

/**
 * 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)
{
#if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
	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");
		oxid = 0;
		size = 0;
		sid = 0;
		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:
		lpfc_nvmeio_data(phba, "NVMET LS  DROP: "
				 "xri x%x sz %d from %06x\n",
				 oxid, size, sid);
		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;

	lpfc_nvmeio_data(phba, "NVMET LS   RCV: xri x%x sz %d from %06x\n",
			 oxid, size, sid);
	/*
	 * 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;
	}

	lpfc_nvmeio_data(phba, "NVMET LS  DROP: xri x%x sz %d from %06x\n",
			 oxid, size, sid);

	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);
#endif
}

/**
 * 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)
{
#if (IS_ENABLED(CONFIG_NVME_TARGET_FC))
	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;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	uint32_t id;
#endif

	if (!nvmebuf || !phba->targetport) {
		lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
				"6157 FCP Drop IO\n");
		oxid = 0;
		size = 0;
		sid = 0;
		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;
	spin_lock_init(&ctxp->ctxlock);

#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
	if (phba->ktime_on) {
		ctxp->ts_isr_cmd = isr_timestamp;
		ctxp->ts_cmd_nvme = ktime_get_ns();
		ctxp->ts_nvme_data = 0;
		ctxp->ts_data_wqput = 0;
		ctxp->ts_isr_data = 0;
		ctxp->ts_data_nvme = 0;
		ctxp->ts_nvme_status = 0;
		ctxp->ts_status_wqput = 0;
		ctxp->ts_isr_status = 0;
		ctxp->ts_status_nvme = 0;
	}

	if (phba->cpucheck_on & LPFC_CHECK_NVMET_RCV) {
		id = smp_processor_id();
		if (id < LPFC_CHECK_CPU_CNT)
			phba->cpucheck_rcv_io[id]++;
	}
#endif

	lpfc_nvmeio_data(phba, "NVMET FCP  RCV: xri x%x sz %d CPU %02x\n",
			 oxid, size, smp_processor_id());

	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: err x%x\n",
			ctxp->oxid, rc);
dropit:
	lpfc_nvmeio_data(phba, "NVMET FCP DROP: xri x%x sz %d from %06x\n",
			 oxid, size, sid);
	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);
	}
#endif
}

/**
 * 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_ELS4_REP);
	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 */
		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;
	unsigned long flags;
	bool released = false;

	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;
	spin_lock_irqsave(&ctxp->ctxlock, flags);
	if (ctxp->flag & LPFC_NVMET_CTX_RLS)
		released = true;
	ctxp->flag &= ~LPFC_NVMET_ABORT_OP;
	spin_unlock_irqrestore(&ctxp->ctxlock, flags);

	/*
	 * if transport has released ctx, then can reuse it. Otherwise,
	 * will be recycled by transport release call.
	 */
	if (released)
		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;
	unsigned long flags;
	uint32_t status, result;
	bool released = false;

	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;
		spin_lock_irqsave(&ctxp->ctxlock, flags);
		if (ctxp->flag & LPFC_NVMET_CTX_RLS)
			released = true;
		ctxp->flag &= ~LPFC_NVMET_ABORT_OP;
		spin_unlock_irqrestore(&ctxp->ctxlock, flags);

		/*
		 * if transport has released ctx, then can reuse it. Otherwise,
		 * will be recycled by transport release call.
		 */
		if (released)
			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 Abort: sid %x xri x%x/x%x\n",
			sid, xri, ctxp->wqeq->sli4_xritag);

	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) ? ndlp->nlp_state : NLP_STE_MAX_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) ? ndlp->nlp_state : NLP_STE_MAX_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;
}