OSCL-LXR linux-6.0.1/​drivers/​scsi/​lpfc/​lpfc_nvme.c	Source navigation Diff markup Identifier search General search
	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /*******************************************************************
  * This file is part of the Emulex Linux Device Driver for         *
  * Fibre Channel Host Bus Adapters.                                *
  * Copyright (C) 2017-2022 Broadcom. All Rights Reserved. The term *
  * “Broadcom” refers to Broadcom Inc. 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 "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_nvme.h"
 #include "lpfc_scsi.h"
 #include "lpfc_logmsg.h"
 #include "lpfc_crtn.h"
 #include "lpfc_vport.h"
 #include "lpfc_debugfs.h"
 
 /* NVME initiator-based functions */
 
 static struct lpfc_io_buf *
 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
           int idx, int expedite);
 
 static void
 lpfc_release_nvme_buf(struct lpfc_hba *, struct lpfc_io_buf *);
 
 static struct nvme_fc_port_template lpfc_nvme_template;
 
 /**
  * lpfc_nvme_create_queue -
  * @pnvme_lport: Transport localport that LS is to be issued from
  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
  * @qsize: Size of the queue in bytes
  * @handle: An opaque driver handle used in follow-up calls.
  *
  * Driver registers this routine to preallocate and initialize any
  * internal data structures to bind the @qidx to its internal IO queues.
  * A hardware queue maps (qidx) to a specific driver MSI-X vector/EQ/CQ/WQ.
  *
  * Return value :
  *   0 - Success
  *   -EINVAL - Unsupported input value.
  *   -ENOMEM - Could not alloc necessary memory
  **/
 static int
 lpfc_nvme_create_queue(struct nvme_fc_local_port *pnvme_lport,
                unsigned int qidx, u16 qsize,
                void **handle)
 {
     struct lpfc_nvme_lport *lport;
     struct lpfc_vport *vport;
     struct lpfc_nvme_qhandle *qhandle;
     char *str;
 
     if (!pnvme_lport->private)
         return -ENOMEM;
 
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     vport = lport->vport;
 
     if (!vport || vport->load_flag & FC_UNLOADING ||
         vport->phba->hba_flag & HBA_IOQ_FLUSH)
         return -ENODEV;
 
     qhandle = kzalloc(sizeof(struct lpfc_nvme_qhandle), GFP_KERNEL);
     if (qhandle == NULL)
         return -ENOMEM;
 
     qhandle->cpu_id = raw_smp_processor_id();
     qhandle->qidx = qidx;
     /*
      * NVME qidx == 0 is the admin queue, so both admin queue
      * and first IO queue will use MSI-X vector and associated
      * EQ/CQ/WQ at index 0. After that they are sequentially assigned.
      */
     if (qidx) {
         str = "IO ";  /* IO queue */
         qhandle->index = ((qidx - 1) %
             lpfc_nvme_template.max_hw_queues);
     } else {
         str = "ADM";  /* Admin queue */
         qhandle->index = qidx;
     }
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
              "6073 Binding %s HdwQueue %d  (cpu %d) to "
              "hdw_queue %d qhandle x%px\n", str,
              qidx, qhandle->cpu_id, qhandle->index, qhandle);
     *handle = (void *)qhandle;
     return 0;
 }
 
 /**
  * lpfc_nvme_delete_queue -
  * @pnvme_lport: Transport localport that LS is to be issued from
  * @qidx: An cpu index used to affinitize IO queues and MSIX vectors.
  * @handle: An opaque driver handle from lpfc_nvme_create_queue
  *
  * Driver registers this routine to free
  * any internal data structures to bind the @qidx to its internal
  * IO queues.
  *
  * Return value :
  *   0 - Success
  *   TODO:  What are the failure codes.
  **/
 static void
 lpfc_nvme_delete_queue(struct nvme_fc_local_port *pnvme_lport,
                unsigned int qidx,
                void *handle)
 {
     struct lpfc_nvme_lport *lport;
     struct lpfc_vport *vport;
 
     if (!pnvme_lport->private)
         return;
 
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     vport = lport->vport;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
             "6001 ENTER.  lpfc_pnvme x%px, qidx x%x qhandle x%px\n",
             lport, qidx, handle);
     kfree(handle);
 }
 
 static void
 lpfc_nvme_localport_delete(struct nvme_fc_local_port *localport)
 {
     struct lpfc_nvme_lport *lport = localport->private;
 
     lpfc_printf_vlog(lport->vport, KERN_INFO, LOG_NVME,
              "6173 localport x%px delete complete\n",
              lport);
 
     /* release any threads waiting for the unreg to complete */
     if (lport->vport->localport)
         complete(lport->lport_unreg_cmp);
 }
 
 /* lpfc_nvme_remoteport_delete
  *
  * @remoteport: Pointer to an nvme transport remoteport instance.
  *
  * This is a template downcall.  NVME transport calls this function
  * when it has completed the unregistration of a previously
  * registered remoteport.
  *
  * Return value :
  * None
  */
 static void
 lpfc_nvme_remoteport_delete(struct nvme_fc_remote_port *remoteport)
 {
     struct lpfc_nvme_rport *rport = remoteport->private;
     struct lpfc_vport *vport;
     struct lpfc_nodelist *ndlp;
     u32 fc4_xpt_flags;
 
     ndlp = rport->ndlp;
     if (!ndlp) {
         pr_err("**** %s: NULL ndlp on rport x%px remoteport x%px\n",
                __func__, rport, remoteport);
         goto rport_err;
     }
 
     vport = ndlp->vport;
     if (!vport) {
         pr_err("**** %s: Null vport on ndlp x%px, ste x%x rport x%px\n",
                __func__, ndlp, ndlp->nlp_state, rport);
         goto rport_err;
     }
 
     fc4_xpt_flags = NVME_XPT_REGD | SCSI_XPT_REGD;
 
     /* Remove this rport from the lport's list - memory is owned by the
      * transport. Remove the ndlp reference for the NVME transport before
      * calling state machine to remove the node.
      */
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6146 remoteport delete of remoteport x%px, ndlp x%px "
              "DID x%x xflags x%x\n",
              remoteport, ndlp, ndlp->nlp_DID, ndlp->fc4_xpt_flags);
     spin_lock_irq(&ndlp->lock);
 
     /* The register rebind might have occurred before the delete
      * downcall.  Guard against this race.
      */
     if (ndlp->fc4_xpt_flags & NVME_XPT_UNREG_WAIT)
         ndlp->fc4_xpt_flags &= ~(NVME_XPT_UNREG_WAIT | NVME_XPT_REGD);
 
     spin_unlock_irq(&ndlp->lock);
 
     /* On a devloss timeout event, one more put is executed provided the
      * NVME and SCSI rport unregister requests are complete.  If the vport
      * is unloading, this extra put is executed by lpfc_drop_node.
      */
     if (!(ndlp->fc4_xpt_flags & fc4_xpt_flags))
         lpfc_disc_state_machine(vport, ndlp, NULL, NLP_EVT_DEVICE_RM);
 
  rport_err:
     return;
 }
 
 /**
  * lpfc_nvme_handle_lsreq - Process an unsolicited NVME LS request
  * @phba: pointer to lpfc hba data structure.
  * @axchg: pointer to exchange context for the NVME LS request
  *
  * This routine is used for processing an asychronously received NVME LS
  * request. Any remaining validation is done and the LS is then forwarded
  * to the nvme-fc transport via nvme_fc_rcv_ls_req().
  *
  * The calling sequence should be: nvme_fc_rcv_ls_req() -> (processing)
  * -> lpfc_nvme_xmt_ls_rsp/cmp -> req->done.
  * __lpfc_nvme_xmt_ls_rsp_cmp should free the allocated axchg.
  *
  * Returns 0 if LS was handled and delivered to the transport
  * Returns 1 if LS failed to be handled and should be dropped
  */
 int
 lpfc_nvme_handle_lsreq(struct lpfc_hba *phba,
             struct lpfc_async_xchg_ctx *axchg)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     struct lpfc_vport *vport;
     struct lpfc_nvme_rport *lpfc_rport;
     struct nvme_fc_remote_port *remoteport;
     struct lpfc_nvme_lport *lport;
     uint32_t *payload = axchg->payload;
     int rc;
 
     vport = axchg->ndlp->vport;
     lpfc_rport = axchg->ndlp->nrport;
     if (!lpfc_rport)
         return -EINVAL;
 
     remoteport = lpfc_rport->remoteport;
     if (!vport->localport ||
         vport->phba->hba_flag & HBA_IOQ_FLUSH)
         return -EINVAL;
 
     lport = vport->localport->private;
     if (!lport)
         return -EINVAL;
 
     rc = nvme_fc_rcv_ls_req(remoteport, &axchg->ls_rsp, axchg->payload,
                 axchg->size);
 
     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_DISC,
             "6205 NVME Unsol rcv: sz %d rc %d: %08x %08x %08x "
             "%08x %08x %08x\n",
             axchg->size, rc,
             *payload, *(payload+1), *(payload+2),
             *(payload+3), *(payload+4), *(payload+5));
 
     if (!rc)
         return 0;
 #endif
     return 1;
 }
 
 /**
  * __lpfc_nvme_ls_req_cmp - Generic completion handler for a NVME
  *        LS request.
  * @phba: Pointer to HBA context object
  * @vport: The local port that issued the LS
  * @cmdwqe: Pointer to driver command WQE object.
  * @wcqe: Pointer to driver response CQE object.
  *
  * This function is the generic completion handler for NVME LS requests.
  * The function updates any states and statistics, calls the transport
  * ls_req done() routine, then tears down the command and buffers used
  * for the LS request.
  **/
 void
 __lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba,  struct lpfc_vport *vport,
             struct lpfc_iocbq *cmdwqe,
             struct lpfc_wcqe_complete *wcqe)
 {
     struct nvmefc_ls_req *pnvme_lsreq;
     struct lpfc_dmabuf *buf_ptr;
     struct lpfc_nodelist *ndlp;
     uint32_t status;
 
     pnvme_lsreq = cmdwqe->context_un.nvme_lsreq;
     ndlp = cmdwqe->ndlp;
     buf_ptr = cmdwqe->bpl_dmabuf;
 
     status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6047 NVMEx LS REQ x%px cmpl DID %x Xri: %x "
              "status %x reason x%x cmd:x%px lsreg:x%px bmp:x%px "
              "ndlp:x%px\n",
              pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
              cmdwqe->sli4_xritag, status,
              (wcqe->parameter & 0xffff),
              cmdwqe, pnvme_lsreq, cmdwqe->bpl_dmabuf,
              ndlp);
 
     lpfc_nvmeio_data(phba, "NVMEx LS CMPL: xri x%x stat x%x parm x%x\n",
              cmdwqe->sli4_xritag, status, wcqe->parameter);
 
     if (buf_ptr) {
         lpfc_mbuf_free(phba, buf_ptr->virt, buf_ptr->phys);
         kfree(buf_ptr);
         cmdwqe->bpl_dmabuf = NULL;
     }
     if (pnvme_lsreq->done)
         pnvme_lsreq->done(pnvme_lsreq, status);
     else
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6046 NVMEx cmpl without done call back? "
                  "Data x%px DID %x Xri: %x status %x\n",
                 pnvme_lsreq, ndlp ? ndlp->nlp_DID : 0,
                 cmdwqe->sli4_xritag, status);
     if (ndlp) {
         lpfc_nlp_put(ndlp);
         cmdwqe->ndlp = NULL;
     }
     lpfc_sli_release_iocbq(phba, cmdwqe);
 }
 
 static void
 lpfc_nvme_ls_req_cmp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdwqe,
              struct lpfc_iocbq *rspwqe)
 {
     struct lpfc_vport *vport = cmdwqe->vport;
     struct lpfc_nvme_lport *lport;
     uint32_t status;
     struct lpfc_wcqe_complete *wcqe = &rspwqe->wcqe_cmpl;
 
     status = bf_get(lpfc_wcqe_c_status, wcqe) & LPFC_IOCB_STATUS_MASK;
 
     if (vport->localport) {
         lport = (struct lpfc_nvme_lport *)vport->localport->private;
         if (lport) {
             atomic_inc(&lport->fc4NvmeLsCmpls);
             if (status) {
                 if (bf_get(lpfc_wcqe_c_xb, wcqe))
                     atomic_inc(&lport->cmpl_ls_xb);
                 atomic_inc(&lport->cmpl_ls_err);
             }
         }
     }
 
     __lpfc_nvme_ls_req_cmp(phba, vport, cmdwqe, wcqe);
 }
 
 static int
 lpfc_nvme_gen_req(struct lpfc_vport *vport, struct lpfc_dmabuf *bmp,
           struct lpfc_dmabuf *inp,
           struct nvmefc_ls_req *pnvme_lsreq,
           void (*cmpl)(struct lpfc_hba *, struct lpfc_iocbq *,
                    struct lpfc_iocbq *),
           struct lpfc_nodelist *ndlp, uint32_t num_entry,
           uint32_t tmo, uint8_t retry)
 {
     struct lpfc_hba *phba = vport->phba;
     union lpfc_wqe128 *wqe;
     struct lpfc_iocbq *genwqe;
     struct ulp_bde64 *bpl;
     struct ulp_bde64 bde;
     int i, rc, xmit_len, first_len;
 
     /* Allocate buffer for  command WQE */
     genwqe = lpfc_sli_get_iocbq(phba);
     if (genwqe == NULL)
         return 1;
 
     wqe = &genwqe->wqe;
     /* Initialize only 64 bytes */
     memset(wqe, 0, sizeof(union lpfc_wqe));
 
     genwqe->bpl_dmabuf = bmp;
     genwqe->cmd_flag |= LPFC_IO_NVME_LS;
 
     /* Save for completion so we can release these resources */
     genwqe->ndlp = lpfc_nlp_get(ndlp);
     if (!genwqe->ndlp) {
         dev_warn(&phba->pcidev->dev,
              "Warning: Failed node ref, not sending LS_REQ\n");
         lpfc_sli_release_iocbq(phba, genwqe);
         return 1;
     }
 
     genwqe->context_un.nvme_lsreq = pnvme_lsreq;
     /* Fill in payload, bp points to frame payload */
 
     if (!tmo)
         /* FC spec states we need 3 * ratov for CT requests */
         tmo = (3 * phba->fc_ratov);
 
     /* For this command calculate the xmit length of the request bde. */
     xmit_len = 0;
     first_len = 0;
     bpl = (struct ulp_bde64 *)bmp->virt;
     for (i = 0; i < num_entry; i++) {
         bde.tus.w = bpl[i].tus.w;
         if (bde.tus.f.bdeFlags != BUFF_TYPE_BDE_64)
             break;
         xmit_len += bde.tus.f.bdeSize;
         if (i == 0)
             first_len = xmit_len;
     }
 
     genwqe->num_bdes = num_entry;
     genwqe->hba_wqidx = 0;
 
     /* Words 0 - 2 */
     wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_64;
     wqe->generic.bde.tus.f.bdeSize = first_len;
     wqe->generic.bde.addrLow = bpl[0].addrLow;
     wqe->generic.bde.addrHigh = bpl[0].addrHigh;
 
     /* Word 3 */
     wqe->gen_req.request_payload_len = first_len;
 
     /* Word 4 */
 
     /* Word 5 */
     bf_set(wqe_dfctl, &wqe->gen_req.wge_ctl, 0);
     bf_set(wqe_si, &wqe->gen_req.wge_ctl, 1);
     bf_set(wqe_la, &wqe->gen_req.wge_ctl, 1);
     bf_set(wqe_rctl, &wqe->gen_req.wge_ctl, FC_RCTL_ELS4_REQ);
     bf_set(wqe_type, &wqe->gen_req.wge_ctl, FC_TYPE_NVME);
 
     /* Word 6 */
     bf_set(wqe_ctxt_tag, &wqe->gen_req.wqe_com,
            phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
     bf_set(wqe_xri_tag, &wqe->gen_req.wqe_com, genwqe->sli4_xritag);
 
     /* Word 7 */
     bf_set(wqe_tmo, &wqe->gen_req.wqe_com, tmo);
     bf_set(wqe_class, &wqe->gen_req.wqe_com, CLASS3);
     bf_set(wqe_cmnd, &wqe->gen_req.wqe_com, CMD_GEN_REQUEST64_WQE);
     bf_set(wqe_ct, &wqe->gen_req.wqe_com, SLI4_CT_RPI);
 
     /* Word 8 */
     wqe->gen_req.wqe_com.abort_tag = genwqe->iotag;
 
     /* Word 9 */
     bf_set(wqe_reqtag, &wqe->gen_req.wqe_com, genwqe->iotag);
 
     /* Word 10 */
     bf_set(wqe_dbde, &wqe->gen_req.wqe_com, 1);
     bf_set(wqe_iod, &wqe->gen_req.wqe_com, LPFC_WQE_IOD_READ);
     bf_set(wqe_qosd, &wqe->gen_req.wqe_com, 1);
     bf_set(wqe_lenloc, &wqe->gen_req.wqe_com, LPFC_WQE_LENLOC_NONE);
     bf_set(wqe_ebde_cnt, &wqe->gen_req.wqe_com, 0);
 
     /* Word 11 */
     bf_set(wqe_cqid, &wqe->gen_req.wqe_com, LPFC_WQE_CQ_ID_DEFAULT);
     bf_set(wqe_cmd_type, &wqe->gen_req.wqe_com, OTHER_COMMAND);
 
 
     /* Issue GEN REQ WQE for NPORT <did> */
     genwqe->cmd_cmpl = cmpl;
     genwqe->drvrTimeout = tmo + LPFC_DRVR_TIMEOUT;
     genwqe->vport = vport;
     genwqe->retry = retry;
 
     lpfc_nvmeio_data(phba, "NVME LS  XMIT: xri x%x iotag x%x to x%06x\n",
              genwqe->sli4_xritag, genwqe->iotag, ndlp->nlp_DID);
 
     rc = lpfc_sli4_issue_wqe(phba, &phba->sli4_hba.hdwq[0], genwqe);
     if (rc) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6045 Issue GEN REQ WQE to NPORT x%x "
                  "Data: x%x x%x  rc x%x\n",
                  ndlp->nlp_DID, genwqe->iotag,
                  vport->port_state, rc);
         lpfc_nlp_put(ndlp);
         lpfc_sli_release_iocbq(phba, genwqe);
         return 1;
     }
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_ELS,
              "6050 Issue GEN REQ WQE to NPORT x%x "
              "Data: oxid: x%x state: x%x wq:x%px lsreq:x%px "
              "bmp:x%px xmit:%d 1st:%d\n",
              ndlp->nlp_DID, genwqe->sli4_xritag,
              vport->port_state,
              genwqe, pnvme_lsreq, bmp, xmit_len, first_len);
     return 0;
 }
 
 
 /**
  * __lpfc_nvme_ls_req - Generic service routine to issue an NVME LS request
  * @vport: The local port issuing the LS
  * @ndlp: The remote port to send the LS to
  * @pnvme_lsreq: Pointer to LS request structure from the transport
  * @gen_req_cmp: Completion call-back
  *
  * Routine validates the ndlp, builds buffers and sends a GEN_REQUEST
  * WQE to perform the LS operation.
  *
  * Return value :
  *   0 - Success
  *   non-zero: various error codes, in form of -Exxx
  **/
 int
 __lpfc_nvme_ls_req(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
               struct nvmefc_ls_req *pnvme_lsreq,
               void (*gen_req_cmp)(struct lpfc_hba *phba,
                 struct lpfc_iocbq *cmdwqe,
                 struct lpfc_iocbq *rspwqe))
 {
     struct lpfc_dmabuf *bmp;
     struct ulp_bde64 *bpl;
     int ret;
     uint16_t ntype, nstate;
 
     if (!ndlp) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6051 NVMEx LS REQ: Bad NDLP x%px, Failing "
                  "LS Req\n",
                  ndlp);
         return -ENODEV;
     }
 
     ntype = ndlp->nlp_type;
     nstate = ndlp->nlp_state;
     if ((ntype & NLP_NVME_TARGET && nstate != NLP_STE_MAPPED_NODE) ||
         (ntype & NLP_NVME_INITIATOR && nstate != NLP_STE_UNMAPPED_NODE)) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6088 NVMEx LS REQ: Fail DID x%06x not "
                  "ready for IO. Type x%x, State x%x\n",
                  ndlp->nlp_DID, ntype, nstate);
         return -ENODEV;
     }
     if (vport->phba->hba_flag & HBA_IOQ_FLUSH)
         return -ENODEV;
 
     if (!vport->phba->sli4_hba.nvmels_wq)
         return -ENOMEM;
 
     /*
      * there are two dma buf in the request, actually there is one and
      * the second one is just the start address + cmd size.
      * Before calling lpfc_nvme_gen_req these buffers need to be wrapped
      * in a lpfc_dmabuf struct. When freeing we just free the wrapper
      * because the nvem layer owns the data bufs.
      * We do not have to break these packets open, we don't care what is
      * in them. And we do not have to look at the resonse data, we only
      * care that we got a response. All of the caring is going to happen
      * in the nvme-fc layer.
      */
 
     bmp = kmalloc(sizeof(*bmp), GFP_KERNEL);
     if (!bmp) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6044 NVMEx LS REQ: Could not alloc LS buf "
                  "for DID %x\n",
                  ndlp->nlp_DID);
         return -ENOMEM;
     }
 
     bmp->virt = lpfc_mbuf_alloc(vport->phba, MEM_PRI, &(bmp->phys));
     if (!bmp->virt) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6042 NVMEx LS REQ: Could not alloc mbuf "
                  "for DID %x\n",
                  ndlp->nlp_DID);
         kfree(bmp);
         return -ENOMEM;
     }
 
     INIT_LIST_HEAD(&bmp->list);
 
     bpl = (struct ulp_bde64 *)bmp->virt;
     bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rqstdma));
     bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rqstdma));
     bpl->tus.f.bdeFlags = 0;
     bpl->tus.f.bdeSize = pnvme_lsreq->rqstlen;
     bpl->tus.w = le32_to_cpu(bpl->tus.w);
     bpl++;
 
     bpl->addrHigh = le32_to_cpu(putPaddrHigh(pnvme_lsreq->rspdma));
     bpl->addrLow = le32_to_cpu(putPaddrLow(pnvme_lsreq->rspdma));
     bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
     bpl->tus.f.bdeSize = pnvme_lsreq->rsplen;
     bpl->tus.w = le32_to_cpu(bpl->tus.w);
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
             "6149 NVMEx LS REQ: Issue to DID 0x%06x lsreq x%px, "
             "rqstlen:%d rsplen:%d %pad %pad\n",
             ndlp->nlp_DID, pnvme_lsreq, pnvme_lsreq->rqstlen,
             pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
             &pnvme_lsreq->rspdma);
 
     ret = lpfc_nvme_gen_req(vport, bmp, pnvme_lsreq->rqstaddr,
                 pnvme_lsreq, gen_req_cmp, ndlp, 2,
                 pnvme_lsreq->timeout, 0);
     if (ret != WQE_SUCCESS) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6052 NVMEx REQ: EXIT. issue ls wqe failed "
                  "lsreq x%px Status %x DID %x\n",
                  pnvme_lsreq, ret, ndlp->nlp_DID);
         lpfc_mbuf_free(vport->phba, bmp->virt, bmp->phys);
         kfree(bmp);
         return -EIO;
     }
 
     return 0;
 }
 
 /**
  * lpfc_nvme_ls_req - Issue an NVME Link Service request
  * @pnvme_lport: Transport localport that LS is to be issued from.
  * @pnvme_rport: Transport remoteport that LS is to be sent to.
  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
  *
  * Driver registers this routine to handle any link service request
  * from the nvme_fc transport to a remote nvme-aware port.
  *
  * Return value :
  *   0 - Success
  *   non-zero: various error codes, in form of -Exxx
  **/
 static int
 lpfc_nvme_ls_req(struct nvme_fc_local_port *pnvme_lport,
          struct nvme_fc_remote_port *pnvme_rport,
          struct nvmefc_ls_req *pnvme_lsreq)
 {
     struct lpfc_nvme_lport *lport;
     struct lpfc_nvme_rport *rport;
     struct lpfc_vport *vport;
     int ret;
 
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
     if (unlikely(!lport) || unlikely(!rport))
         return -EINVAL;
 
     vport = lport->vport;
     if (vport->load_flag & FC_UNLOADING ||
         vport->phba->hba_flag & HBA_IOQ_FLUSH)
         return -ENODEV;
 
     atomic_inc(&lport->fc4NvmeLsRequests);
 
     ret = __lpfc_nvme_ls_req(vport, rport->ndlp, pnvme_lsreq,
                  lpfc_nvme_ls_req_cmp);
     if (ret)
         atomic_inc(&lport->xmt_ls_err);
 
     return ret;
 }
 
 /**
  * __lpfc_nvme_ls_abort - Generic service routine to abort a prior
  *         NVME LS request
  * @vport: The local port that issued the LS
  * @ndlp: The remote port the LS was sent to
  * @pnvme_lsreq: Pointer to LS request structure from the transport
  *
  * The driver validates the ndlp, looks for the LS, and aborts the
  * LS if found.
  *
  * Returns:
  * 0 : if LS found and aborted
  * non-zero: various error conditions in form -Exxx
  **/
 int
 __lpfc_nvme_ls_abort(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
             struct nvmefc_ls_req *pnvme_lsreq)
 {
     struct lpfc_hba *phba = vport->phba;
     struct lpfc_sli_ring *pring;
     struct lpfc_iocbq *wqe, *next_wqe;
     bool foundit = false;
 
     if (!ndlp) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                 "6049 NVMEx LS REQ Abort: Bad NDLP x%px DID "
                 "x%06x, Failing LS Req\n",
                 ndlp, ndlp ? ndlp->nlp_DID : 0);
         return -EINVAL;
     }
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
              "6040 NVMEx LS REQ Abort: Issue LS_ABORT for lsreq "
              "x%px rqstlen:%d rsplen:%d %pad %pad\n",
              pnvme_lsreq, pnvme_lsreq->rqstlen,
              pnvme_lsreq->rsplen, &pnvme_lsreq->rqstdma,
              &pnvme_lsreq->rspdma);
 
     /*
      * Lock the ELS ring txcmplq and look for the wqe that matches
      * this ELS. If found, issue an abort on the wqe.
      */
     pring = phba->sli4_hba.nvmels_wq->pring;
     spin_lock_irq(&phba->hbalock);
     spin_lock(&pring->ring_lock);
     list_for_each_entry_safe(wqe, next_wqe, &pring->txcmplq, list) {
         if (wqe->context_un.nvme_lsreq == pnvme_lsreq) {
             wqe->cmd_flag |= LPFC_DRIVER_ABORTED;
             foundit = true;
             break;
         }
     }
     spin_unlock(&pring->ring_lock);
 
     if (foundit)
         lpfc_sli_issue_abort_iotag(phba, pring, wqe, NULL);
     spin_unlock_irq(&phba->hbalock);
 
     if (foundit)
         return 0;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC | LOG_NVME_ABTS,
              "6213 NVMEx LS REQ Abort: Unable to locate req x%px\n",
              pnvme_lsreq);
     return -EINVAL;
 }
 
 static int
 lpfc_nvme_xmt_ls_rsp(struct nvme_fc_local_port *localport,
              struct nvme_fc_remote_port *remoteport,
              struct nvmefc_ls_rsp *ls_rsp)
 {
     struct lpfc_async_xchg_ctx *axchg =
         container_of(ls_rsp, struct lpfc_async_xchg_ctx, ls_rsp);
     struct lpfc_nvme_lport *lport;
     int rc;
 
     if (axchg->phba->pport->load_flag & FC_UNLOADING)
         return -ENODEV;
 
     lport = (struct lpfc_nvme_lport *)localport->private;
 
     rc = __lpfc_nvme_xmt_ls_rsp(axchg, ls_rsp, __lpfc_nvme_xmt_ls_rsp_cmp);
 
     if (rc) {
         /*
          * unless the failure is due to having already sent
          * the response, an abort will be generated for the
          * exchange if the rsp can't be sent.
          */
         if (rc != -EALREADY)
             atomic_inc(&lport->xmt_ls_abort);
         return rc;
     }
 
     return 0;
 }
 
 /**
  * lpfc_nvme_ls_abort - Abort a prior NVME LS request
  * @pnvme_lport: Transport localport that LS is to be issued from.
  * @pnvme_rport: Transport remoteport that LS is to be sent to.
  * @pnvme_lsreq: the transport nvme_ls_req structure for the LS
  *
  * Driver registers this routine to abort a NVME LS request that is
  * in progress (from the transports perspective).
  **/
 static void
 lpfc_nvme_ls_abort(struct nvme_fc_local_port *pnvme_lport,
            struct nvme_fc_remote_port *pnvme_rport,
            struct nvmefc_ls_req *pnvme_lsreq)
 {
     struct lpfc_nvme_lport *lport;
     struct lpfc_vport *vport;
     struct lpfc_nodelist *ndlp;
     int ret;
 
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     if (unlikely(!lport))
         return;
     vport = lport->vport;
 
     if (vport->load_flag & FC_UNLOADING)
         return;
 
     ndlp = lpfc_findnode_did(vport, pnvme_rport->port_id);
 
     ret = __lpfc_nvme_ls_abort(vport, ndlp, pnvme_lsreq);
     if (!ret)
         atomic_inc(&lport->xmt_ls_abort);
 }
 
 /* Fix up the existing sgls for NVME IO. */
 static inline void
 lpfc_nvme_adj_fcp_sgls(struct lpfc_vport *vport,
                struct lpfc_io_buf *lpfc_ncmd,
                struct nvmefc_fcp_req *nCmd)
 {
     struct lpfc_hba  *phba = vport->phba;
     struct sli4_sge *sgl;
     union lpfc_wqe128 *wqe;
     uint32_t *wptr, *dptr;
 
     /*
      * Get a local pointer to the built-in wqe and correct
      * the cmd size to match NVME's 96 bytes and fix
      * the dma address.
      */
 
     wqe = &lpfc_ncmd->cur_iocbq.wqe;
 
     /*
      * Adjust the FCP_CMD and FCP_RSP DMA data and sge_len to
      * match NVME.  NVME sends 96 bytes. Also, use the
      * nvme commands command and response dma addresses
      * rather than the virtual memory to ease the restore
      * operation.
      */
     sgl = lpfc_ncmd->dma_sgl;
     sgl->sge_len = cpu_to_le32(nCmd->cmdlen);
     if (phba->cfg_nvme_embed_cmd) {
         sgl->addr_hi = 0;
         sgl->addr_lo = 0;
 
         /* Word 0-2 - NVME CMND IU (embedded payload) */
         wqe->generic.bde.tus.f.bdeFlags = BUFF_TYPE_BDE_IMMED;
         wqe->generic.bde.tus.f.bdeSize = 56;
         wqe->generic.bde.addrHigh = 0;
         wqe->generic.bde.addrLow =  64;  /* Word 16 */
 
         /* Word 10  - dbde is 0, wqes is 1 in template */
 
         /*
          * Embed the payload in the last half of the WQE
          * WQE words 16-30 get the NVME CMD IU payload
          *
          * WQE words 16-19 get payload Words 1-4
          * WQE words 20-21 get payload Words 6-7
          * WQE words 22-29 get payload Words 16-23
          */
         wptr = &wqe->words[16];  /* WQE ptr */
         dptr = (uint32_t *)nCmd->cmdaddr;  /* payload ptr */
         dptr++;         /* Skip Word 0 in payload */
 
         *wptr++ = *dptr++;  /* Word 1 */
         *wptr++ = *dptr++;  /* Word 2 */
         *wptr++ = *dptr++;  /* Word 3 */
         *wptr++ = *dptr++;  /* Word 4 */
         dptr++;         /* Skip Word 5 in payload */
         *wptr++ = *dptr++;  /* Word 6 */
         *wptr++ = *dptr++;  /* Word 7 */
         dptr += 8;      /* Skip Words 8-15 in payload */
         *wptr++ = *dptr++;  /* Word 16 */
         *wptr++ = *dptr++;  /* Word 17 */
         *wptr++ = *dptr++;  /* Word 18 */
         *wptr++ = *dptr++;  /* Word 19 */
         *wptr++ = *dptr++;  /* Word 20 */
         *wptr++ = *dptr++;  /* Word 21 */
         *wptr++ = *dptr++;  /* Word 22 */
         *wptr   = *dptr;    /* Word 23 */
     } else {
         sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->cmddma));
         sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->cmddma));
 
         /* Word 0-2 - NVME CMND IU Inline BDE */
         wqe->generic.bde.tus.f.bdeFlags =  BUFF_TYPE_BDE_64;
         wqe->generic.bde.tus.f.bdeSize = nCmd->cmdlen;
         wqe->generic.bde.addrHigh = sgl->addr_hi;
         wqe->generic.bde.addrLow =  sgl->addr_lo;
 
         /* Word 10 */
         bf_set(wqe_dbde, &wqe->generic.wqe_com, 1);
         bf_set(wqe_wqes, &wqe->generic.wqe_com, 0);
     }
 
     sgl++;
 
     /* Setup the physical region for the FCP RSP */
     sgl->addr_hi = cpu_to_le32(putPaddrHigh(nCmd->rspdma));
     sgl->addr_lo = cpu_to_le32(putPaddrLow(nCmd->rspdma));
     sgl->word2 = le32_to_cpu(sgl->word2);
     if (nCmd->sg_cnt)
         bf_set(lpfc_sli4_sge_last, sgl, 0);
     else
         bf_set(lpfc_sli4_sge_last, sgl, 1);
     sgl->word2 = cpu_to_le32(sgl->word2);
     sgl->sge_len = cpu_to_le32(nCmd->rsplen);
 }
 
 
 /*
  * lpfc_nvme_io_cmd_cmpl - Complete an NVME-over-FCP IO
  *
  * Driver registers this routine as it io request handler.  This
  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
  * data structure to the rport indicated in @lpfc_nvme_rport.
  *
  * Return value :
  *   0 - Success
  *   TODO: What are the failure codes.
  **/
 static void
 lpfc_nvme_io_cmd_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
               struct lpfc_iocbq *pwqeOut)
 {
     struct lpfc_io_buf *lpfc_ncmd = pwqeIn->io_buf;
     struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl;
     struct lpfc_vport *vport = pwqeIn->vport;
     struct nvmefc_fcp_req *nCmd;
     struct nvme_fc_ersp_iu *ep;
     struct nvme_fc_cmd_iu *cp;
     struct lpfc_nodelist *ndlp;
     struct lpfc_nvme_fcpreq_priv *freqpriv;
     struct lpfc_nvme_lport *lport;
     uint32_t code, status, idx;
     uint16_t cid, sqhd, data;
     uint32_t *ptr;
     uint32_t lat;
     bool call_done = false;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     int cpu;
 #endif
     int offline = 0;
 
     /* Sanity check on return of outstanding command */
     if (!lpfc_ncmd) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6071 Null lpfc_ncmd pointer. No "
                  "release, skip completion\n");
         return;
     }
 
     /* Guard against abort handler being called at same time */
     spin_lock(&lpfc_ncmd->buf_lock);
 
     if (!lpfc_ncmd->nvmeCmd) {
         spin_unlock(&lpfc_ncmd->buf_lock);
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6066 Missing cmpl ptrs: lpfc_ncmd x%px, "
                  "nvmeCmd x%px\n",
                  lpfc_ncmd, lpfc_ncmd->nvmeCmd);
 
         /* Release the lpfc_ncmd regardless of the missing elements. */
         lpfc_release_nvme_buf(phba, lpfc_ncmd);
         return;
     }
     nCmd = lpfc_ncmd->nvmeCmd;
     status = bf_get(lpfc_wcqe_c_status, wcqe);
 
     idx = lpfc_ncmd->cur_iocbq.hba_wqidx;
     phba->sli4_hba.hdwq[idx].nvme_cstat.io_cmpls++;
 
     if (unlikely(status && vport->localport)) {
         lport = (struct lpfc_nvme_lport *)vport->localport->private;
         if (lport) {
             if (bf_get(lpfc_wcqe_c_xb, wcqe))
                 atomic_inc(&lport->cmpl_fcp_xb);
             atomic_inc(&lport->cmpl_fcp_err);
         }
     }
 
     lpfc_nvmeio_data(phba, "NVME FCP CMPL: xri x%x stat x%x parm x%x\n",
              lpfc_ncmd->cur_iocbq.sli4_xritag,
              status, wcqe->parameter);
     /*
      * Catch race where our node has transitioned, but the
      * transport is still transitioning.
      */
     ndlp = lpfc_ncmd->ndlp;
     if (!ndlp) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6062 Ignoring NVME cmpl.  No ndlp\n");
         goto out_err;
     }
 
     code = bf_get(lpfc_wcqe_c_code, wcqe);
     if (code == CQE_CODE_NVME_ERSP) {
         /* For this type of CQE, we need to rebuild the rsp */
         ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
 
         /*
          * Get Command Id from cmd to plug into response. This
          * code is not needed in the next NVME Transport drop.
          */
         cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
         cid = cp->sqe.common.command_id;
 
         /*
          * RSN is in CQE word 2
          * SQHD is in CQE Word 3 bits 15:0
          * Cmd Specific info is in CQE Word 1
          * and in CQE Word 0 bits 15:0
          */
         sqhd = bf_get(lpfc_wcqe_c_sqhead, wcqe);
 
         /* Now lets build the NVME ERSP IU */
         ep->iu_len = cpu_to_be16(8);
         ep->rsn = wcqe->parameter;
         ep->xfrd_len = cpu_to_be32(nCmd->payload_length);
         ep->rsvd12 = 0;
         ptr = (uint32_t *)&ep->cqe.result.u64;
         *ptr++ = wcqe->total_data_placed;
         data = bf_get(lpfc_wcqe_c_ersp0, wcqe);
         *ptr = (uint32_t)data;
         ep->cqe.sq_head = sqhd;
         ep->cqe.sq_id =  nCmd->sqid;
         ep->cqe.command_id = cid;
         ep->cqe.status = 0;
 
         lpfc_ncmd->status = IOSTAT_SUCCESS;
         lpfc_ncmd->result = 0;
         nCmd->rcv_rsplen = LPFC_NVME_ERSP_LEN;
         nCmd->transferred_length = nCmd->payload_length;
     } else {
         lpfc_ncmd->status = (status & LPFC_IOCB_STATUS_MASK);
         lpfc_ncmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
 
         /* For NVME, the only failure path that results in an
          * IO error is when the adapter rejects it.  All other
          * conditions are a success case and resolved by the
          * transport.
          * IOSTAT_FCP_RSP_ERROR means:
          * 1. Length of data received doesn't match total
          *    transfer length in WQE
          * 2. If the RSP payload does NOT match these cases:
          *    a. RSP length 12/24 bytes and all zeros
          *    b. NVME ERSP
          */
         switch (lpfc_ncmd->status) {
         case IOSTAT_SUCCESS:
             nCmd->transferred_length = wcqe->total_data_placed;
             nCmd->rcv_rsplen = 0;
             nCmd->status = 0;
             break;
         case IOSTAT_FCP_RSP_ERROR:
             nCmd->transferred_length = wcqe->total_data_placed;
             nCmd->rcv_rsplen = wcqe->parameter;
             nCmd->status = 0;
 
             /* Get the NVME cmd details for this unique error. */
             cp = (struct nvme_fc_cmd_iu *)nCmd->cmdaddr;
             ep = (struct nvme_fc_ersp_iu *)nCmd->rspaddr;
 
             /* Check if this is really an ERSP */
             if (nCmd->rcv_rsplen == LPFC_NVME_ERSP_LEN) {
                 lpfc_ncmd->status = IOSTAT_SUCCESS;
                 lpfc_ncmd->result = 0;
 
                 lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
                     "6084 NVME FCP_ERR ERSP: "
                     "xri %x placed x%x opcode x%x cmd_id "
                     "x%x cqe_status x%x\n",
                     lpfc_ncmd->cur_iocbq.sli4_xritag,
                     wcqe->total_data_placed,
                     cp->sqe.common.opcode,
                     cp->sqe.common.command_id,
                     ep->cqe.status);
                 break;
             }
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "6081 NVME Completion Protocol Error: "
                      "xri %x status x%x result x%x "
                      "placed x%x opcode x%x cmd_id x%x, "
                      "cqe_status x%x\n",
                      lpfc_ncmd->cur_iocbq.sli4_xritag,
                      lpfc_ncmd->status, lpfc_ncmd->result,
                      wcqe->total_data_placed,
                      cp->sqe.common.opcode,
                      cp->sqe.common.command_id,
                      ep->cqe.status);
             break;
         case IOSTAT_LOCAL_REJECT:
             /* Let fall through to set command final state. */
             if (lpfc_ncmd->result == IOERR_ABORT_REQUESTED)
                 lpfc_printf_vlog(vport, KERN_INFO,
                      LOG_NVME_IOERR,
                      "6032 Delay Aborted cmd x%px "
                      "nvme cmd x%px, xri x%x, "
                      "xb %d\n",
                      lpfc_ncmd, nCmd,
                      lpfc_ncmd->cur_iocbq.sli4_xritag,
                      bf_get(lpfc_wcqe_c_xb, wcqe));
             fallthrough;
         default:
 out_err:
             lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                      "6072 NVME Completion Error: xri %x "
                      "status x%x result x%x [x%x] "
                      "placed x%x\n",
                      lpfc_ncmd->cur_iocbq.sli4_xritag,
                      lpfc_ncmd->status, lpfc_ncmd->result,
                      wcqe->parameter,
                      wcqe->total_data_placed);
             nCmd->transferred_length = 0;
             nCmd->rcv_rsplen = 0;
             nCmd->status = NVME_SC_INTERNAL;
             offline = pci_channel_offline(vport->phba->pcidev);
         }
     }
 
     /* pick up SLI4 exhange busy condition */
     if (bf_get(lpfc_wcqe_c_xb, wcqe) && !offline)
         lpfc_ncmd->flags |= LPFC_SBUF_XBUSY;
     else
         lpfc_ncmd->flags &= ~LPFC_SBUF_XBUSY;
 
     /* Update stats and complete the IO.  There is
      * no need for dma unprep because the nvme_transport
      * owns the dma address.
      */
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_ncmd->ts_cmd_start) {
         lpfc_ncmd->ts_isr_cmpl = pwqeIn->isr_timestamp;
         lpfc_ncmd->ts_data_io = ktime_get_ns();
         phba->ktime_last_cmd = lpfc_ncmd->ts_data_io;
         lpfc_io_ktime(phba, lpfc_ncmd);
     }
     if (unlikely(phba->hdwqstat_on & LPFC_CHECK_NVME_IO)) {
         cpu = raw_smp_processor_id();
         this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
         if (lpfc_ncmd->cpu != cpu)
             lpfc_printf_vlog(vport,
                      KERN_INFO, LOG_NVME_IOERR,
                      "6701 CPU Check cmpl: "
                      "cpu %d expect %d\n",
                      cpu, lpfc_ncmd->cpu);
     }
 #endif
 
     /* NVME targets need completion held off until the abort exchange
      * completes unless the NVME Rport is getting unregistered.
      */
 
     if (!(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
         freqpriv = nCmd->private;
         freqpriv->nvme_buf = NULL;
         lpfc_ncmd->nvmeCmd = NULL;
         call_done = true;
     }
     spin_unlock(&lpfc_ncmd->buf_lock);
 
     /* Check if IO qualified for CMF */
     if (phba->cmf_active_mode != LPFC_CFG_OFF &&
         nCmd->io_dir == NVMEFC_FCP_READ &&
         nCmd->payload_length) {
         /* Used when calculating average latency */
         lat = ktime_get_ns() - lpfc_ncmd->rx_cmd_start;
         lpfc_update_cmf_cmpl(phba, lat, nCmd->payload_length, NULL);
     }
 
     if (call_done)
         nCmd->done(nCmd);
 
     /* Call release with XB=1 to queue the IO into the abort list. */
     lpfc_release_nvme_buf(phba, lpfc_ncmd);
 }
 
 
 /**
  * lpfc_nvme_prep_io_cmd - Issue an NVME-over-FCP IO
  * @vport: pointer to a host virtual N_Port data structure
  * @lpfc_ncmd: Pointer to lpfc scsi command
  * @pnode: pointer to a node-list data structure
  * @cstat: pointer to the control status structure
  *
  * Driver registers this routine as it io request handler.  This
  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
  * data structure to the rport indicated in @lpfc_nvme_rport.
  *
  * Return value :
  *   0 - Success
  *   TODO: What are the failure codes.
  **/
 static int
 lpfc_nvme_prep_io_cmd(struct lpfc_vport *vport,
               struct lpfc_io_buf *lpfc_ncmd,
               struct lpfc_nodelist *pnode,
               struct lpfc_fc4_ctrl_stat *cstat)
 {
     struct lpfc_hba *phba = vport->phba;
     struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
     struct nvme_common_command *sqe;
     struct lpfc_iocbq *pwqeq = &lpfc_ncmd->cur_iocbq;
     union lpfc_wqe128 *wqe = &pwqeq->wqe;
     uint32_t req_len;
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.
      */
     if (nCmd->sg_cnt) {
         if (nCmd->io_dir == NVMEFC_FCP_WRITE) {
             /* From the iwrite template, initialize words 7 - 11 */
             memcpy(&wqe->words[7],
                    &lpfc_iwrite_cmd_template.words[7],
                    sizeof(uint32_t) * 5);
 
             /* Word 4 */
             wqe->fcp_iwrite.total_xfer_len = nCmd->payload_length;
 
             /* Word 5 */
             if ((phba->cfg_nvme_enable_fb) &&
                 (pnode->nlp_flag & NLP_FIRSTBURST)) {
                 req_len = lpfc_ncmd->nvmeCmd->payload_length;
                 if (req_len < pnode->nvme_fb_size)
                     wqe->fcp_iwrite.initial_xfer_len =
                         req_len;
                 else
                     wqe->fcp_iwrite.initial_xfer_len =
                         pnode->nvme_fb_size;
             } else {
                 wqe->fcp_iwrite.initial_xfer_len = 0;
             }
             cstat->output_requests++;
         } else {
             /* From the iread template, initialize words 7 - 11 */
             memcpy(&wqe->words[7],
                    &lpfc_iread_cmd_template.words[7],
                    sizeof(uint32_t) * 5);
 
             /* Word 4 */
             wqe->fcp_iread.total_xfer_len = nCmd->payload_length;
 
             /* Word 5 */
             wqe->fcp_iread.rsrvd5 = 0;
 
             /* For a CMF Managed port, iod must be zero'ed */
             if (phba->cmf_active_mode == LPFC_CFG_MANAGED)
                 bf_set(wqe_iod, &wqe->fcp_iread.wqe_com,
                        LPFC_WQE_IOD_NONE);
             cstat->input_requests++;
         }
     } else {
         /* From the icmnd template, initialize words 4 - 11 */
         memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
                sizeof(uint32_t) * 8);
         cstat->control_requests++;
     }
 
     if (pnode->nlp_nvme_info & NLP_NVME_NSLER) {
         bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
         sqe = &((struct nvme_fc_cmd_iu *)
             nCmd->cmdaddr)->sqe.common;
         if (sqe->opcode == nvme_admin_async_event)
             bf_set(wqe_ffrq, &wqe->generic.wqe_com, 1);
     }
 
     /*
      * Finish initializing those WQE fields that are independent
      * of the nvme_cmnd request_buffer
      */
 
     /* Word 3 */
     bf_set(payload_offset_len, &wqe->fcp_icmd,
            (nCmd->rsplen + nCmd->cmdlen));
 
     /* Word 6 */
     bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,
            phba->sli4_hba.rpi_ids[pnode->nlp_rpi]);
     bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
 
     /* Word 8 */
     wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
 
     /* Word 9 */
     bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
 
     /* Word 10 */
     bf_set(wqe_xchg, &wqe->fcp_iwrite.wqe_com, LPFC_NVME_XCHG);
 
     /* Words 13 14 15 are for PBDE support */
 
     /* add the VMID tags as per switch response */
     if (unlikely(lpfc_ncmd->cur_iocbq.cmd_flag & LPFC_IO_VMID)) {
         if (phba->pport->vmid_priority_tagging) {
             bf_set(wqe_ccpe, &wqe->fcp_iwrite.wqe_com, 1);
             bf_set(wqe_ccp, &wqe->fcp_iwrite.wqe_com,
                    lpfc_ncmd->cur_iocbq.vmid_tag.cs_ctl_vmid);
         } else {
             bf_set(wqe_appid, &wqe->fcp_iwrite.wqe_com, 1);
             bf_set(wqe_wqes, &wqe->fcp_iwrite.wqe_com, 1);
             wqe->words[31] = lpfc_ncmd->cur_iocbq.vmid_tag.app_id;
         }
     }
 
     pwqeq->vport = vport;
     return 0;
 }
 
 
 /**
  * lpfc_nvme_prep_io_dma - Issue an NVME-over-FCP IO
  * @vport: pointer to a host virtual N_Port data structure
  * @lpfc_ncmd: Pointer to lpfc scsi command
  *
  * Driver registers this routine as it io request handler.  This
  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
  * data structure to the rport indicated in @lpfc_nvme_rport.
  *
  * Return value :
  *   0 - Success
  *   TODO: What are the failure codes.
  **/
 static int
 lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
               struct lpfc_io_buf *lpfc_ncmd)
 {
     struct lpfc_hba *phba = vport->phba;
     struct nvmefc_fcp_req *nCmd = lpfc_ncmd->nvmeCmd;
     union lpfc_wqe128 *wqe = &lpfc_ncmd->cur_iocbq.wqe;
     struct sli4_sge *sgl = lpfc_ncmd->dma_sgl;
     struct sli4_hybrid_sgl *sgl_xtra = NULL;
     struct scatterlist *data_sg;
     struct sli4_sge *first_data_sgl;
     struct ulp_bde64 *bde;
     dma_addr_t physaddr = 0;
     uint32_t dma_len = 0;
     uint32_t dma_offset = 0;
     int nseg, i, j;
     bool lsp_just_set = false;
 
     /* Fix up the command and response DMA stuff. */
     lpfc_nvme_adj_fcp_sgls(vport, lpfc_ncmd, nCmd);
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.
      */
     if (nCmd->sg_cnt) {
         /*
          * Jump over the cmd and rsp SGEs.  The fix routine
          * has already adjusted for this.
          */
         sgl += 2;
 
         first_data_sgl = sgl;
         lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
         if (lpfc_ncmd->seg_cnt > lpfc_nvme_template.max_sgl_segments) {
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "6058 Too many sg segments from "
                     "NVME Transport.  Max %d, "
                     "nvmeIO sg_cnt %d\n",
                     phba->cfg_nvme_seg_cnt + 1,
                     lpfc_ncmd->seg_cnt);
             lpfc_ncmd->seg_cnt = 0;
             return 1;
         }
 
         /*
          * The driver established a maximum scatter-gather segment count
          * during probe that limits the number of sg elements in any
          * single nvme command.  Just run through the seg_cnt and format
          * the sge's.
          */
         nseg = nCmd->sg_cnt;
         data_sg = nCmd->first_sgl;
 
         /* for tracking the segment boundaries */
         j = 2;
         for (i = 0; i < nseg; i++) {
             if (data_sg == NULL) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                         "6059 dptr err %d, nseg %d\n",
                         i, nseg);
                 lpfc_ncmd->seg_cnt = 0;
                 return 1;
             }
 
             sgl->word2 = 0;
             if (nseg == 1) {
                 bf_set(lpfc_sli4_sge_last, sgl, 1);
                 bf_set(lpfc_sli4_sge_type, sgl,
                        LPFC_SGE_TYPE_DATA);
             } else {
                 bf_set(lpfc_sli4_sge_last, sgl, 0);
 
                 /* expand the segment */
                 if (!lsp_just_set &&
                     !((j + 1) % phba->border_sge_num) &&
                     ((nseg - 1) != i)) {
                     /* set LSP type */
                     bf_set(lpfc_sli4_sge_type, sgl,
                            LPFC_SGE_TYPE_LSP);
 
                     sgl_xtra = lpfc_get_sgl_per_hdwq(
                             phba, lpfc_ncmd);
 
                     if (unlikely(!sgl_xtra)) {
                         lpfc_ncmd->seg_cnt = 0;
                         return 1;
                     }
                     sgl->addr_lo = cpu_to_le32(putPaddrLow(
                                sgl_xtra->dma_phys_sgl));
                     sgl->addr_hi = cpu_to_le32(putPaddrHigh(
                                sgl_xtra->dma_phys_sgl));
 
                 } else {
                     bf_set(lpfc_sli4_sge_type, sgl,
                            LPFC_SGE_TYPE_DATA);
                 }
             }
 
             if (!(bf_get(lpfc_sli4_sge_type, sgl) &
                      LPFC_SGE_TYPE_LSP)) {
                 if ((nseg - 1) == i)
                     bf_set(lpfc_sli4_sge_last, sgl, 1);
 
                 physaddr = sg_dma_address(data_sg);
                 dma_len = sg_dma_len(data_sg);
                 sgl->addr_lo = cpu_to_le32(
                              putPaddrLow(physaddr));
                 sgl->addr_hi = cpu_to_le32(
                             putPaddrHigh(physaddr));
 
                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
                 sgl->word2 = cpu_to_le32(sgl->word2);
                 sgl->sge_len = cpu_to_le32(dma_len);
 
                 dma_offset += dma_len;
                 data_sg = sg_next(data_sg);
 
                 sgl++;
 
                 lsp_just_set = false;
             } else {
                 sgl->word2 = cpu_to_le32(sgl->word2);
 
                 sgl->sge_len = cpu_to_le32(
                              phba->cfg_sg_dma_buf_size);
 
                 sgl = (struct sli4_sge *)sgl_xtra->dma_sgl;
                 i = i - 1;
 
                 lsp_just_set = true;
             }
 
             j++;
         }
 
         /* PBDE support for first data SGE only */
         if (nseg == 1 && phba->cfg_enable_pbde) {
             /* Words 13-15 */
             bde = (struct ulp_bde64 *)
                 &wqe->words[13];
             bde->addrLow = first_data_sgl->addr_lo;
             bde->addrHigh = first_data_sgl->addr_hi;
             bde->tus.f.bdeSize =
                 le32_to_cpu(first_data_sgl->sge_len);
             bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
             bde->tus.w = cpu_to_le32(bde->tus.w);
 
             /* Word 11 - set PBDE bit */
             bf_set(wqe_pbde, &wqe->generic.wqe_com, 1);
         } else {
             memset(&wqe->words[13], 0, (sizeof(uint32_t) * 3));
             /* Word 11 - PBDE bit disabled by default template */
         }
 
     } else {
         lpfc_ncmd->seg_cnt = 0;
 
         /* For this clause to be valid, the payload_length
          * and sg_cnt must zero.
          */
         if (nCmd->payload_length != 0) {
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "6063 NVME DMA Prep Err: sg_cnt %d "
                     "payload_length x%x\n",
                     nCmd->sg_cnt, nCmd->payload_length);
             return 1;
         }
     }
     return 0;
 }
 
 /**
  * lpfc_nvme_fcp_io_submit - Issue an NVME-over-FCP IO
  * @pnvme_lport: Pointer to the driver's local port data
  * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
  * @pnvme_fcreq: IO request from nvme fc to driver.
  *
  * Driver registers this routine as it io request handler.  This
  * routine issues an fcp WQE with data from the @lpfc_nvme_fcpreq
  * data structure to the rport indicated in @lpfc_nvme_rport.
  *
  * Return value :
  *   0 - Success
  *   TODO: What are the failure codes.
  **/
 static int
 lpfc_nvme_fcp_io_submit(struct nvme_fc_local_port *pnvme_lport,
             struct nvme_fc_remote_port *pnvme_rport,
             void *hw_queue_handle,
             struct nvmefc_fcp_req *pnvme_fcreq)
 {
     int ret = 0;
     int expedite = 0;
     int idx, cpu;
     struct lpfc_nvme_lport *lport;
     struct lpfc_fc4_ctrl_stat *cstat;
     struct lpfc_vport *vport;
     struct lpfc_hba *phba;
     struct lpfc_nodelist *ndlp;
     struct lpfc_io_buf *lpfc_ncmd;
     struct lpfc_nvme_rport *rport;
     struct lpfc_nvme_qhandle *lpfc_queue_info;
     struct lpfc_nvme_fcpreq_priv *freqpriv;
     struct nvme_common_command *sqe;
     uint64_t start = 0;
 #if (IS_ENABLED(CONFIG_NVME_FC))
     u8 *uuid = NULL;
     int err;
     enum dma_data_direction iodir;
 #endif
 
     /* Validate pointers. LLDD fault handling with transport does
      * have timing races.
      */
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     if (unlikely(!lport)) {
         ret = -EINVAL;
         goto out_fail;
     }
 
     vport = lport->vport;
 
     if (unlikely(!hw_queue_handle)) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6117 Fail IO, NULL hw_queue_handle\n");
         atomic_inc(&lport->xmt_fcp_err);
         ret = -EBUSY;
         goto out_fail;
     }
 
     phba = vport->phba;
 
     if ((unlikely(vport->load_flag & FC_UNLOADING)) ||
         phba->hba_flag & HBA_IOQ_FLUSH) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6124 Fail IO, Driver unload\n");
         atomic_inc(&lport->xmt_fcp_err);
         ret = -ENODEV;
         goto out_fail;
     }
 
     freqpriv = pnvme_fcreq->private;
     if (unlikely(!freqpriv)) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6158 Fail IO, NULL request data\n");
         atomic_inc(&lport->xmt_fcp_err);
         ret = -EINVAL;
         goto out_fail;
     }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (phba->ktime_on)
         start = ktime_get_ns();
 #endif
     rport = (struct lpfc_nvme_rport *)pnvme_rport->private;
     lpfc_queue_info = (struct lpfc_nvme_qhandle *)hw_queue_handle;
 
     /*
      * Catch race where our node has transitioned, but the
      * transport is still transitioning.
      */
     ndlp = rport->ndlp;
     if (!ndlp) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
                  "6053 Busy IO, ndlp not ready: rport x%px "
                   "ndlp x%px, DID x%06x\n",
                  rport, ndlp, pnvme_rport->port_id);
         atomic_inc(&lport->xmt_fcp_err);
         ret = -EBUSY;
         goto out_fail;
     }
 
     /* The remote node has to be a mapped target or it's an error. */
     if ((ndlp->nlp_type & NLP_NVME_TARGET) &&
         (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NODE | LOG_NVME_IOERR,
                  "6036 Fail IO, DID x%06x not ready for "
                  "IO. State x%x, Type x%x Flg x%x\n",
                  pnvme_rport->port_id,
                  ndlp->nlp_state, ndlp->nlp_type,
                  ndlp->fc4_xpt_flags);
         atomic_inc(&lport->xmt_fcp_bad_ndlp);
         ret = -EBUSY;
         goto out_fail;
 
     }
 
     /* Currently only NVME Keep alive commands should be expedited
      * if the driver runs out of a resource. These should only be
      * issued on the admin queue, qidx 0
      */
     if (!lpfc_queue_info->qidx && !pnvme_fcreq->sg_cnt) {
         sqe = &((struct nvme_fc_cmd_iu *)
             pnvme_fcreq->cmdaddr)->sqe.common;
         if (sqe->opcode == nvme_admin_keep_alive)
             expedite = 1;
     }
 
     /* Check if IO qualifies for CMF */
     if (phba->cmf_active_mode != LPFC_CFG_OFF &&
         pnvme_fcreq->io_dir == NVMEFC_FCP_READ &&
         pnvme_fcreq->payload_length) {
         ret = lpfc_update_cmf_cmd(phba, pnvme_fcreq->payload_length);
         if (ret) {
             ret = -EBUSY;
             goto out_fail;
         }
         /* Get start time for IO latency */
         start = ktime_get_ns();
     }
 
     /* The node is shared with FCP IO, make sure the IO pending count does
      * not exceed the programmed depth.
      */
     if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
         if ((atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) &&
             !expedite) {
             lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                      "6174 Fail IO, ndlp qdepth exceeded: "
                      "idx %d DID %x pend %d qdepth %d\n",
                      lpfc_queue_info->index, ndlp->nlp_DID,
                      atomic_read(&ndlp->cmd_pending),
                      ndlp->cmd_qdepth);
             atomic_inc(&lport->xmt_fcp_qdepth);
             ret = -EBUSY;
             goto out_fail1;
         }
     }
 
     /* Lookup Hardware Queue index based on fcp_io_sched module parameter */
     if (phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
         idx = lpfc_queue_info->index;
     } else {
         cpu = raw_smp_processor_id();
         idx = phba->sli4_hba.cpu_map[cpu].hdwq;
     }
 
     lpfc_ncmd = lpfc_get_nvme_buf(phba, ndlp, idx, expedite);
     if (lpfc_ncmd == NULL) {
         atomic_inc(&lport->xmt_fcp_noxri);
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6065 Fail IO, driver buffer pool is empty: "
                  "idx %d DID %x\n",
                  lpfc_queue_info->index, ndlp->nlp_DID);
         ret = -EBUSY;
         goto out_fail1;
     }
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (start) {
         lpfc_ncmd->ts_cmd_start = start;
         lpfc_ncmd->ts_last_cmd = phba->ktime_last_cmd;
     } else {
         lpfc_ncmd->ts_cmd_start = 0;
     }
 #endif
     lpfc_ncmd->rx_cmd_start = start;
 
     /*
      * Store the data needed by the driver to issue, abort, and complete
      * an IO.
      * Do not let the IO hang out forever.  There is no midlayer issuing
      * an abort so inform the FW of the maximum IO pending time.
      */
     freqpriv->nvme_buf = lpfc_ncmd;
     lpfc_ncmd->nvmeCmd = pnvme_fcreq;
     lpfc_ncmd->ndlp = ndlp;
     lpfc_ncmd->qidx = lpfc_queue_info->qidx;
 
 #if (IS_ENABLED(CONFIG_NVME_FC))
     /* check the necessary and sufficient condition to support VMID */
     if (lpfc_is_vmid_enabled(phba) &&
         (ndlp->vmid_support ||
          phba->pport->vmid_priority_tagging ==
          LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
         /* is the I/O generated by a VM, get the associated virtual */
         /* entity id */
         uuid = nvme_fc_io_getuuid(pnvme_fcreq);
 
         if (uuid) {
             if (pnvme_fcreq->io_dir == NVMEFC_FCP_WRITE)
                 iodir = DMA_TO_DEVICE;
             else if (pnvme_fcreq->io_dir == NVMEFC_FCP_READ)
                 iodir = DMA_FROM_DEVICE;
             else
                 iodir = DMA_NONE;
 
             err = lpfc_vmid_get_appid(vport, uuid, iodir,
                     (union lpfc_vmid_io_tag *)
                         &lpfc_ncmd->cur_iocbq.vmid_tag);
             if (!err)
                 lpfc_ncmd->cur_iocbq.cmd_flag |= LPFC_IO_VMID;
         }
     }
 #endif
 
     /*
      * Issue the IO on the WQ indicated by index in the hw_queue_handle.
      * This identfier was create in our hardware queue create callback
      * routine. The driver now is dependent on the IO queue steering from
      * the transport.  We are trusting the upper NVME layers know which
      * index to use and that they have affinitized a CPU to this hardware
      * queue. A hardware queue maps to a driver MSI-X vector/EQ/CQ/WQ.
      */
     lpfc_ncmd->cur_iocbq.hba_wqidx = idx;
     cstat = &phba->sli4_hba.hdwq[idx].nvme_cstat;
 
     lpfc_nvme_prep_io_cmd(vport, lpfc_ncmd, ndlp, cstat);
     ret = lpfc_nvme_prep_io_dma(vport, lpfc_ncmd);
     if (ret) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6175 Fail IO, Prep DMA: "
                  "idx %d DID %x\n",
                  lpfc_queue_info->index, ndlp->nlp_DID);
         atomic_inc(&lport->xmt_fcp_err);
         ret = -ENOMEM;
         goto out_free_nvme_buf;
     }
 
     lpfc_nvmeio_data(phba, "NVME FCP XMIT: xri x%x idx %d to %06x\n",
              lpfc_ncmd->cur_iocbq.sli4_xritag,
              lpfc_queue_info->index, ndlp->nlp_DID);
 
     ret = lpfc_sli4_issue_wqe(phba, lpfc_ncmd->hdwq, &lpfc_ncmd->cur_iocbq);
     if (ret) {
         atomic_inc(&lport->xmt_fcp_wqerr);
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "6113 Fail IO, Could not issue WQE err %x "
                  "sid: x%x did: x%x oxid: x%x\n",
                  ret, vport->fc_myDID, ndlp->nlp_DID,
                  lpfc_ncmd->cur_iocbq.sli4_xritag);
         goto out_free_nvme_buf;
     }
 
     if (phba->cfg_xri_rebalancing)
         lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_ncmd->hdwq_no);
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_ncmd->ts_cmd_start)
         lpfc_ncmd->ts_cmd_wqput = ktime_get_ns();
 
     if (phba->hdwqstat_on & LPFC_CHECK_NVME_IO) {
         cpu = raw_smp_processor_id();
         this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
         lpfc_ncmd->cpu = cpu;
         if (idx != cpu)
             lpfc_printf_vlog(vport,
                      KERN_INFO, LOG_NVME_IOERR,
                     "6702 CPU Check cmd: "
                     "cpu %d wq %d\n",
                     lpfc_ncmd->cpu,
                     lpfc_queue_info->index);
     }
 #endif
     return 0;
 
  out_free_nvme_buf:
     if (lpfc_ncmd->nvmeCmd->sg_cnt) {
         if (lpfc_ncmd->nvmeCmd->io_dir == NVMEFC_FCP_WRITE)
             cstat->output_requests--;
         else
             cstat->input_requests--;
     } else
         cstat->control_requests--;
     lpfc_release_nvme_buf(phba, lpfc_ncmd);
  out_fail1:
     lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT,
                  pnvme_fcreq->payload_length, NULL);
  out_fail:
     return ret;
 }
 
 /**
  * lpfc_nvme_abort_fcreq_cmpl - Complete an NVME FCP abort request.
  * @phba: Pointer to HBA context object
  * @cmdiocb: Pointer to command iocb object.
  * @rspiocb: Pointer to response iocb object.
  *
  * This is the callback function for any NVME FCP IO that was aborted.
  *
  * Return value:
  *   None
  **/
 void
 lpfc_nvme_abort_fcreq_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
                struct lpfc_iocbq *rspiocb)
 {
     struct lpfc_wcqe_complete *abts_cmpl = &rspiocb->wcqe_cmpl;
 
     lpfc_printf_log(phba, KERN_INFO, LOG_NVME,
             "6145 ABORT_XRI_CN completing on rpi x%x "
             "original iotag x%x, abort cmd iotag x%x "
             "req_tag x%x, status x%x, hwstatus x%x\n",
             bf_get(wqe_ctxt_tag, &cmdiocb->wqe.generic.wqe_com),
             get_job_abtsiotag(phba, cmdiocb), cmdiocb->iotag,
             bf_get(lpfc_wcqe_c_request_tag, abts_cmpl),
             bf_get(lpfc_wcqe_c_status, abts_cmpl),
             bf_get(lpfc_wcqe_c_hw_status, abts_cmpl));
     lpfc_sli_release_iocbq(phba, cmdiocb);
 }
 
 /**
  * lpfc_nvme_fcp_abort - Issue an NVME-over-FCP ABTS
  * @pnvme_lport: Pointer to the driver's local port data
  * @pnvme_rport: Pointer to the rport getting the @lpfc_nvme_ereq
  * @hw_queue_handle: Driver-returned handle in lpfc_nvme_create_queue
  * @pnvme_fcreq: IO request from nvme fc to driver.
  *
  * Driver registers this routine as its nvme request io abort handler.  This
  * routine issues an fcp Abort WQE with data from the @lpfc_nvme_fcpreq
  * data structure to the rport indicated in @lpfc_nvme_rport.  This routine
  * is executed asynchronously - one the target is validated as "MAPPED" and
  * ready for IO, the driver issues the abort request and returns.
  *
  * Return value:
  *   None
  **/
 static void
 lpfc_nvme_fcp_abort(struct nvme_fc_local_port *pnvme_lport,
             struct nvme_fc_remote_port *pnvme_rport,
             void *hw_queue_handle,
             struct nvmefc_fcp_req *pnvme_fcreq)
 {
     struct lpfc_nvme_lport *lport;
     struct lpfc_vport *vport;
     struct lpfc_hba *phba;
     struct lpfc_io_buf *lpfc_nbuf;
     struct lpfc_iocbq *nvmereq_wqe;
     struct lpfc_nvme_fcpreq_priv *freqpriv;
     unsigned long flags;
     int ret_val;
     struct nvme_fc_cmd_iu *cp;
 
     /* Validate pointers. LLDD fault handling with transport does
      * have timing races.
      */
     lport = (struct lpfc_nvme_lport *)pnvme_lport->private;
     if (unlikely(!lport))
         return;
 
     vport = lport->vport;
 
     if (unlikely(!hw_queue_handle)) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
                  "6129 Fail Abort, HW Queue Handle NULL.\n");
         return;
     }
 
     phba = vport->phba;
     freqpriv = pnvme_fcreq->private;
 
     if (unlikely(!freqpriv))
         return;
     if (vport->load_flag & FC_UNLOADING)
         return;
 
     /* Announce entry to new IO submit field. */
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
              "6002 Abort Request to rport DID x%06x "
              "for nvme_fc_req x%px\n",
              pnvme_rport->port_id,
              pnvme_fcreq);
 
     /* 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_IOQ_FLUSH) {
         spin_unlock_irqrestore(&phba->hbalock, flags);
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6139 Driver in reset cleanup - flushing "
                  "NVME Req now.  hba_flag x%x\n",
                  phba->hba_flag);
         return;
     }
 
     lpfc_nbuf = freqpriv->nvme_buf;
     if (!lpfc_nbuf) {
         spin_unlock_irqrestore(&phba->hbalock, flags);
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6140 NVME IO req has no matching lpfc nvme "
                  "io buffer.  Skipping abort req.\n");
         return;
     } else if (!lpfc_nbuf->nvmeCmd) {
         spin_unlock_irqrestore(&phba->hbalock, flags);
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6141 lpfc NVME IO req has no nvme_fcreq "
                  "io buffer.  Skipping abort req.\n");
         return;
     }
     nvmereq_wqe = &lpfc_nbuf->cur_iocbq;
 
     /* Guard against IO completion being called at same time */
     spin_lock(&lpfc_nbuf->buf_lock);
 
     /*
      * The lpfc_nbuf and the mapped nvme_fcreq in the driver's
      * state must match the nvme_fcreq passed by the nvme
      * transport.  If they don't match, it is likely the driver
      * has already completed the NVME IO and the nvme transport
      * has not seen it yet.
      */
     if (lpfc_nbuf->nvmeCmd != pnvme_fcreq) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6143 NVME req mismatch: "
                  "lpfc_nbuf x%px nvmeCmd x%px, "
                  "pnvme_fcreq x%px.  Skipping Abort xri x%x\n",
                  lpfc_nbuf, lpfc_nbuf->nvmeCmd,
                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
         goto out_unlock;
     }
 
     /* Don't abort IOs no longer on the pending queue. */
     if (!(nvmereq_wqe->cmd_flag & LPFC_IO_ON_TXCMPLQ)) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6142 NVME IO req x%px not queued - skipping "
                  "abort req xri x%x\n",
                  pnvme_fcreq, nvmereq_wqe->sli4_xritag);
         goto out_unlock;
     }
 
     atomic_inc(&lport->xmt_fcp_abort);
     lpfc_nvmeio_data(phba, "NVME FCP ABORT: xri x%x idx %d to %06x\n",
              nvmereq_wqe->sli4_xritag,
              nvmereq_wqe->hba_wqidx, pnvme_rport->port_id);
 
     /* Outstanding abort is in progress */
     if (nvmereq_wqe->cmd_flag & LPFC_DRIVER_ABORTED) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6144 Outstanding NVME I/O Abort Request "
                  "still pending on nvme_fcreq x%px, "
                  "lpfc_ncmd x%px xri x%x\n",
                  pnvme_fcreq, lpfc_nbuf,
                  nvmereq_wqe->sli4_xritag);
         goto out_unlock;
     }
 
     ret_val = lpfc_sli4_issue_abort_iotag(phba, nvmereq_wqe,
                           lpfc_nvme_abort_fcreq_cmpl);
 
     spin_unlock(&lpfc_nbuf->buf_lock);
     spin_unlock_irqrestore(&phba->hbalock, flags);
 
     /* Make sure HBA is alive */
     lpfc_issue_hb_tmo(phba);
 
     if (ret_val != WQE_SUCCESS) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "6137 Failed abts issue_wqe with status x%x "
                  "for nvme_fcreq x%px.\n",
                  ret_val, pnvme_fcreq);
         return;
     }
 
     /*
      * Get Command Id from cmd to plug into response. This
      * code is not needed in the next NVME Transport drop.
      */
     cp = (struct nvme_fc_cmd_iu *)lpfc_nbuf->nvmeCmd->cmdaddr;
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_ABTS,
              "6138 Transport Abort NVME Request Issued for "
              "ox_id x%x nvme opcode x%x nvme cmd_id x%x\n",
              nvmereq_wqe->sli4_xritag, cp->sqe.common.opcode,
              cp->sqe.common.command_id);
     return;
 
 out_unlock:
     spin_unlock(&lpfc_nbuf->buf_lock);
     spin_unlock_irqrestore(&phba->hbalock, flags);
     return;
 }
 
 /* Declare and initialization an instance of the FC NVME template. */
 static struct nvme_fc_port_template lpfc_nvme_template = {
     /* initiator-based functions */
     .localport_delete  = lpfc_nvme_localport_delete,
     .remoteport_delete = lpfc_nvme_remoteport_delete,
     .create_queue = lpfc_nvme_create_queue,
     .delete_queue = lpfc_nvme_delete_queue,
     .ls_req       = lpfc_nvme_ls_req,
     .fcp_io       = lpfc_nvme_fcp_io_submit,
     .ls_abort     = lpfc_nvme_ls_abort,
     .fcp_abort    = lpfc_nvme_fcp_abort,
     .xmt_ls_rsp   = lpfc_nvme_xmt_ls_rsp,
 
     .max_hw_queues = 1,
     .max_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
     .max_dif_sgl_segments = LPFC_NVME_DEFAULT_SEGS,
     .dma_boundary = 0xFFFFFFFF,
 
     /* Sizes of additional private data for data structures.
      * No use for the last two sizes at this time.
      */
     .local_priv_sz = sizeof(struct lpfc_nvme_lport),
     .remote_priv_sz = sizeof(struct lpfc_nvme_rport),
     .lsrqst_priv_sz = 0,
     .fcprqst_priv_sz = sizeof(struct lpfc_nvme_fcpreq_priv),
 };
 
 /*
  * lpfc_get_nvme_buf - Get a nvme buffer from io_buf_list of the HBA
  *
  * This routine removes a nvme buffer from head of @hdwq io_buf_list
  * and returns to caller.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_nvme_buf - Success
  **/
 static struct lpfc_io_buf *
 lpfc_get_nvme_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
           int idx, int expedite)
 {
     struct lpfc_io_buf *lpfc_ncmd;
     struct lpfc_sli4_hdw_queue *qp;
     struct sli4_sge *sgl;
     struct lpfc_iocbq *pwqeq;
     union lpfc_wqe128 *wqe;
 
     lpfc_ncmd = lpfc_get_io_buf(phba, NULL, idx, expedite);
 
     if (lpfc_ncmd) {
         pwqeq = &(lpfc_ncmd->cur_iocbq);
         wqe = &pwqeq->wqe;
 
         /* Setup key fields in buffer that may have been changed
          * if other protocols used this buffer.
          */
         pwqeq->cmd_flag = LPFC_IO_NVME;
         pwqeq->cmd_cmpl = lpfc_nvme_io_cmd_cmpl;
         lpfc_ncmd->start_time = jiffies;
         lpfc_ncmd->flags = 0;
 
         /* Rsp SGE will be filled in when we rcv an IO
          * from the NVME Layer to be sent.
          * The cmd is going to be embedded so we need a SKIP SGE.
          */
         sgl = lpfc_ncmd->dma_sgl;
         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_SKIP);
         bf_set(lpfc_sli4_sge_last, sgl, 0);
         sgl->word2 = cpu_to_le32(sgl->word2);
         /* Fill in word 3 / sgl_len during cmd submission */
 
         /* Initialize 64 bytes only */
         memset(wqe, 0, sizeof(union lpfc_wqe));
 
         if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
             atomic_inc(&ndlp->cmd_pending);
             lpfc_ncmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
         }
 
     } else {
         qp = &phba->sli4_hba.hdwq[idx];
         qp->empty_io_bufs++;
     }
 
     return  lpfc_ncmd;
 }
 
 /**
  * lpfc_release_nvme_buf: Return a nvme buffer back to hba nvme buf list.
  * @phba: The Hba for which this call is being executed.
  * @lpfc_ncmd: The nvme buffer which is being released.
  *
  * This routine releases @lpfc_ncmd nvme buffer by adding it to tail of @phba
  * lpfc_io_buf_list list. For SLI4 XRI's are tied to the nvme buffer
  * and cannot be reused for at least RA_TOV amount of time if it was
  * aborted.
  **/
 static void
 lpfc_release_nvme_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_ncmd)
 {
     struct lpfc_sli4_hdw_queue *qp;
     unsigned long iflag = 0;
 
     if ((lpfc_ncmd->flags & LPFC_SBUF_BUMP_QDEPTH) && lpfc_ncmd->ndlp)
         atomic_dec(&lpfc_ncmd->ndlp->cmd_pending);
 
     lpfc_ncmd->ndlp = NULL;
     lpfc_ncmd->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
 
     qp = lpfc_ncmd->hdwq;
     if (unlikely(lpfc_ncmd->flags & LPFC_SBUF_XBUSY)) {
         lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
                 "6310 XB release deferred for "
                 "ox_id x%x on reqtag x%x\n",
                 lpfc_ncmd->cur_iocbq.sli4_xritag,
                 lpfc_ncmd->cur_iocbq.iotag);
 
         spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
         list_add_tail(&lpfc_ncmd->list,
             &qp->lpfc_abts_io_buf_list);
         qp->abts_nvme_io_bufs++;
         spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
     } else
         lpfc_release_io_buf(phba, (struct lpfc_io_buf *)lpfc_ncmd, qp);
 }
 
 /**
  * lpfc_nvme_create_localport - Create/Bind an nvme localport instance.
  * @vport: the lpfc_vport instance requesting a localport.
  *
  * This routine is invoked to create an nvme localport instance to bind
  * to the nvme_fc_transport.  It is called once during driver load
  * like lpfc_create_shost after all other services are initialized.
  * It requires a vport, vpi, and wwns at call time.  Other localport
  * parameters are modified as the driver's FCID and the Fabric WWN
  * are established.
  *
  * Return codes
  *      0 - successful
  *      -ENOMEM - no heap memory available
  *      other values - from nvme registration upcall
  **/
 int
 lpfc_nvme_create_localport(struct lpfc_vport *vport)
 {
     int ret = 0;
     struct lpfc_hba  *phba = vport->phba;
     struct nvme_fc_port_info nfcp_info;
     struct nvme_fc_local_port *localport;
     struct lpfc_nvme_lport *lport;
 
     /* Initialize this localport instance.  The vport wwn usage ensures
      * that NPIV is accounted for.
      */
     memset(&nfcp_info, 0, sizeof(struct nvme_fc_port_info));
     nfcp_info.port_role = FC_PORT_ROLE_NVME_INITIATOR;
     nfcp_info.node_name = wwn_to_u64(vport->fc_nodename.u.wwn);
     nfcp_info.port_name = wwn_to_u64(vport->fc_portname.u.wwn);
 
     /* We need to tell the transport layer + 1 because it takes page
      * alignment into account. When space for the SGL is allocated we
      * allocate + 3, one for cmd, one for rsp and one for this alignment
      */
     lpfc_nvme_template.max_sgl_segments = phba->cfg_nvme_seg_cnt + 1;
 
     /* Advertise how many hw queues we support based on cfg_hdw_queue,
      * which will not exceed cpu count.
      */
     lpfc_nvme_template.max_hw_queues = phba->cfg_hdw_queue;
 
     if (!IS_ENABLED(CONFIG_NVME_FC))
         return ret;
 
     /* localport is allocated from the stack, but the registration
      * call allocates heap memory as well as the private area.
      */
 
     ret = nvme_fc_register_localport(&nfcp_info, &lpfc_nvme_template,
                      &vport->phba->pcidev->dev, &localport);
     if (!ret) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME | LOG_NVME_DISC,
                  "6005 Successfully registered local "
                  "NVME port num %d, localP x%px, private "
                  "x%px, sg_seg %d\n",
                  localport->port_num, localport,
                  localport->private,
                  lpfc_nvme_template.max_sgl_segments);
 
         /* Private is our lport size declared in the template. */
         lport = (struct lpfc_nvme_lport *)localport->private;
         vport->localport = localport;
         lport->vport = vport;
         vport->nvmei_support = 1;
 
         atomic_set(&lport->xmt_fcp_noxri, 0);
         atomic_set(&lport->xmt_fcp_bad_ndlp, 0);
         atomic_set(&lport->xmt_fcp_qdepth, 0);
         atomic_set(&lport->xmt_fcp_err, 0);
         atomic_set(&lport->xmt_fcp_wqerr, 0);
         atomic_set(&lport->xmt_fcp_abort, 0);
         atomic_set(&lport->xmt_ls_abort, 0);
         atomic_set(&lport->xmt_ls_err, 0);
         atomic_set(&lport->cmpl_fcp_xb, 0);
         atomic_set(&lport->cmpl_fcp_err, 0);
         atomic_set(&lport->cmpl_ls_xb, 0);
         atomic_set(&lport->cmpl_ls_err, 0);
 
         atomic_set(&lport->fc4NvmeLsRequests, 0);
         atomic_set(&lport->fc4NvmeLsCmpls, 0);
     }
 
     return ret;
 }
 
 #if (IS_ENABLED(CONFIG_NVME_FC))
 /* lpfc_nvme_lport_unreg_wait - Wait for the host to complete an lport unreg.
  *
  * The driver has to wait for the host nvme transport to callback
  * indicating the localport has successfully unregistered all
  * resources.  Since this is an uninterruptible wait, loop every ten
  * seconds and print a message indicating no progress.
  *
  * An uninterruptible wait is used because of the risk of transport-to-
  * driver state mismatch.
  */
 static void
 lpfc_nvme_lport_unreg_wait(struct lpfc_vport *vport,
                struct lpfc_nvme_lport *lport,
                struct completion *lport_unreg_cmp)
 {
     u32 wait_tmo;
     int ret, i, pending = 0;
     struct lpfc_sli_ring  *pring;
     struct lpfc_hba  *phba = vport->phba;
     struct lpfc_sli4_hdw_queue *qp;
     int abts_scsi, abts_nvme;
 
     /* Host transport has to clean up and confirm requiring an indefinite
      * wait. Print a message if a 10 second wait expires and renew the
      * wait. This is unexpected.
      */
     wait_tmo = msecs_to_jiffies(LPFC_NVME_WAIT_TMO * 1000);
     while (true) {
         ret = wait_for_completion_timeout(lport_unreg_cmp, wait_tmo);
         if (unlikely(!ret)) {
             pending = 0;
             abts_scsi = 0;
             abts_nvme = 0;
             for (i = 0; i < phba->cfg_hdw_queue; i++) {
                 qp = &phba->sli4_hba.hdwq[i];
                 if (!vport->localport || !qp || !qp->io_wq)
                     return;
 
                 pring = qp->io_wq->pring;
                 if (!pring)
                     continue;
                 pending += pring->txcmplq_cnt;
                 abts_scsi += qp->abts_scsi_io_bufs;
                 abts_nvme += qp->abts_nvme_io_bufs;
             }
             if (!vport->localport ||
                 test_bit(HBA_PCI_ERR, &vport->phba->bit_flags) ||
                 vport->load_flag & FC_UNLOADING)
                 return;
 
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "6176 Lport x%px Localport x%px wait "
                      "timed out. Pending %d [%d:%d]. "
                      "Renewing.\n",
                      lport, vport->localport, pending,
                      abts_scsi, abts_nvme);
             continue;
         }
         break;
     }
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
              "6177 Lport x%px Localport x%px Complete Success\n",
              lport, vport->localport);
 }
 #endif
 
 /**
  * lpfc_nvme_destroy_localport - Destroy lpfc_nvme bound to nvme transport.
  * @vport: pointer to a host virtual N_Port data structure
  *
  * This routine is invoked to destroy all lports bound to the phba.
  * The lport memory was allocated by the nvme fc transport and is
  * released there.  This routine ensures all rports bound to the
  * lport have been disconnected.
  *
  **/
 void
 lpfc_nvme_destroy_localport(struct lpfc_vport *vport)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     struct nvme_fc_local_port *localport;
     struct lpfc_nvme_lport *lport;
     int ret;
     DECLARE_COMPLETION_ONSTACK(lport_unreg_cmp);
 
     if (vport->nvmei_support == 0)
         return;
 
     localport = vport->localport;
     if (!localport)
         return;
     lport = (struct lpfc_nvme_lport *)localport->private;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
              "6011 Destroying NVME localport x%px\n",
              localport);
 
     /* lport's rport list is clear.  Unregister
      * lport and release resources.
      */
     lport->lport_unreg_cmp = &lport_unreg_cmp;
     ret = nvme_fc_unregister_localport(localport);
 
     /* Wait for completion.  This either blocks
      * indefinitely or succeeds
      */
     lpfc_nvme_lport_unreg_wait(vport, lport, &lport_unreg_cmp);
     vport->localport = NULL;
 
     /* Regardless of the unregister upcall response, clear
      * nvmei_support.  All rports are unregistered and the
      * driver will clean up.
      */
     vport->nvmei_support = 0;
     if (ret == 0) {
         lpfc_printf_vlog(vport,
                  KERN_INFO, LOG_NVME_DISC,
                  "6009 Unregistered lport Success\n");
     } else {
         lpfc_printf_vlog(vport,
                  KERN_INFO, LOG_NVME_DISC,
                  "6010 Unregistered lport "
                  "Failed, status x%x\n",
                  ret);
     }
 #endif
 }
 
 void
 lpfc_nvme_update_localport(struct lpfc_vport *vport)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     struct nvme_fc_local_port *localport;
     struct lpfc_nvme_lport *lport;
 
     localport = vport->localport;
     if (!localport) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
                  "6710 Update NVME fail. No localport\n");
         return;
     }
     lport = (struct lpfc_nvme_lport *)localport->private;
     if (!lport) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_NVME,
                  "6171 Update NVME fail. localP x%px, No lport\n",
                  localport);
         return;
     }
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME,
              "6012 Update NVME lport x%px did x%x\n",
              localport, vport->fc_myDID);
 
     localport->port_id = vport->fc_myDID;
     if (localport->port_id == 0)
         localport->port_role = FC_PORT_ROLE_NVME_DISCOVERY;
     else
         localport->port_role = FC_PORT_ROLE_NVME_INITIATOR;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6030 bound lport x%px to DID x%06x\n",
              lport, localport->port_id);
 #endif
 }
 
 int
 lpfc_nvme_register_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     int ret = 0;
     struct nvme_fc_local_port *localport;
     struct lpfc_nvme_lport *lport;
     struct lpfc_nvme_rport *rport;
     struct lpfc_nvme_rport *oldrport;
     struct nvme_fc_remote_port *remote_port;
     struct nvme_fc_port_info rpinfo;
     struct lpfc_nodelist *prev_ndlp = NULL;
     struct fc_rport *srport = ndlp->rport;
 
     lpfc_printf_vlog(ndlp->vport, KERN_INFO, LOG_NVME_DISC,
              "6006 Register NVME PORT. DID x%06x nlptype x%x\n",
              ndlp->nlp_DID, ndlp->nlp_type);
 
     localport = vport->localport;
     if (!localport)
         return 0;
 
     lport = (struct lpfc_nvme_lport *)localport->private;
 
     /* NVME rports are not preserved across devloss.
      * Just register this instance.  Note, rpinfo->dev_loss_tmo
      * is left 0 to indicate accept transport defaults.  The
      * driver communicates port role capabilities consistent
      * with the PRLI response data.
      */
     memset(&rpinfo, 0, sizeof(struct nvme_fc_port_info));
     rpinfo.port_id = ndlp->nlp_DID;
     if (ndlp->nlp_type & NLP_NVME_TARGET)
         rpinfo.port_role |= FC_PORT_ROLE_NVME_TARGET;
     if (ndlp->nlp_type & NLP_NVME_INITIATOR)
         rpinfo.port_role |= FC_PORT_ROLE_NVME_INITIATOR;
 
     if (ndlp->nlp_type & NLP_NVME_DISCOVERY)
         rpinfo.port_role |= FC_PORT_ROLE_NVME_DISCOVERY;
 
     rpinfo.port_name = wwn_to_u64(ndlp->nlp_portname.u.wwn);
     rpinfo.node_name = wwn_to_u64(ndlp->nlp_nodename.u.wwn);
     if (srport)
         rpinfo.dev_loss_tmo = srport->dev_loss_tmo;
     else
         rpinfo.dev_loss_tmo = vport->cfg_devloss_tmo;
 
     spin_lock_irq(&ndlp->lock);
 
     /* If an oldrport exists, so does the ndlp reference.  If not
      * a new reference is needed because either the node has never
      * been registered or it's been unregistered and getting deleted.
      */
     oldrport = lpfc_ndlp_get_nrport(ndlp);
     if (oldrport) {
         prev_ndlp = oldrport->ndlp;
         spin_unlock_irq(&ndlp->lock);
     } else {
         spin_unlock_irq(&ndlp->lock);
         if (!lpfc_nlp_get(ndlp)) {
             dev_warn(&vport->phba->pcidev->dev,
                  "Warning - No node ref - exit register\n");
             return 0;
         }
     }
 
     ret = nvme_fc_register_remoteport(localport, &rpinfo, &remote_port);
     if (!ret) {
         /* If the ndlp already has an nrport, this is just
          * a resume of the existing rport.  Else this is a
          * new rport.
          */
         /* Guard against an unregister/reregister
          * race that leaves the WAIT flag set.
          */
         spin_lock_irq(&ndlp->lock);
         ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
         ndlp->fc4_xpt_flags |= NVME_XPT_REGD;
         spin_unlock_irq(&ndlp->lock);
         rport = remote_port->private;
         if (oldrport) {
 
             /* Sever the ndlp<->rport association
              * before dropping the ndlp ref from
              * register.
              */
             spin_lock_irq(&ndlp->lock);
             ndlp->nrport = NULL;
             ndlp->fc4_xpt_flags &= ~NVME_XPT_UNREG_WAIT;
             spin_unlock_irq(&ndlp->lock);
             rport->ndlp = NULL;
             rport->remoteport = NULL;
 
             /* Reference only removed if previous NDLP is no longer
              * active. It might be just a swap and removing the
              * reference would cause a premature cleanup.
              */
             if (prev_ndlp && prev_ndlp != ndlp) {
                 if (!prev_ndlp->nrport)
                     lpfc_nlp_put(prev_ndlp);
             }
         }
 
         /* Clean bind the rport to the ndlp. */
         rport->remoteport = remote_port;
         rport->lport = lport;
         rport->ndlp = ndlp;
         spin_lock_irq(&ndlp->lock);
         ndlp->nrport = rport;
         spin_unlock_irq(&ndlp->lock);
         lpfc_printf_vlog(vport, KERN_INFO,
                  LOG_NVME_DISC | LOG_NODE,
                  "6022 Bind lport x%px to remoteport x%px "
                  "rport x%px WWNN 0x%llx, "
                  "Rport WWPN 0x%llx DID "
                  "x%06x Role x%x, ndlp %p prev_ndlp x%px\n",
                  lport, remote_port, rport,
                  rpinfo.node_name, rpinfo.port_name,
                  rpinfo.port_id, rpinfo.port_role,
                  ndlp, prev_ndlp);
     } else {
         lpfc_printf_vlog(vport, KERN_ERR,
                  LOG_TRACE_EVENT,
                  "6031 RemotePort Registration failed "
                  "err: %d, DID x%06x\n",
                  ret, ndlp->nlp_DID);
     }
 
     return ret;
 #else
     return 0;
 #endif
 }
 
 /*
  * lpfc_nvme_rescan_port - Check to see if we should rescan this remoteport
  *
  * If the ndlp represents an NVME Target, that we are logged into,
  * ping the NVME FC Transport layer to initiate a device rescan
  * on this remote NPort.
  */
 void
 lpfc_nvme_rescan_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     struct lpfc_nvme_rport *nrport;
     struct nvme_fc_remote_port *remoteport = NULL;
 
     spin_lock_irq(&ndlp->lock);
     nrport = lpfc_ndlp_get_nrport(ndlp);
     if (nrport)
         remoteport = nrport->remoteport;
     spin_unlock_irq(&ndlp->lock);
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6170 Rescan NPort DID x%06x type x%x "
              "state x%x nrport x%px remoteport x%px\n",
              ndlp->nlp_DID, ndlp->nlp_type, ndlp->nlp_state,
              nrport, remoteport);
 
     if (!nrport || !remoteport)
         goto rescan_exit;
 
     /* Rescan an NVME target in MAPPED state with DISCOVERY role set */
     if (remoteport->port_role & FC_PORT_ROLE_NVME_DISCOVERY &&
         ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
         nvme_fc_rescan_remoteport(remoteport);
 
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
                  "6172 NVME rescanned DID x%06x "
                  "port_state x%x\n",
                  ndlp->nlp_DID, remoteport->port_state);
     }
     return;
  rescan_exit:
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6169 Skip NVME Rport Rescan, NVME remoteport "
              "unregistered\n");
 #endif
 }
 
 /* lpfc_nvme_unregister_port - unbind the DID and port_role from this rport.
  *
  * There is no notion of Devloss or rport recovery from the current
  * nvme_transport perspective.  Loss of an rport just means IO cannot
  * be sent and recovery is completely up to the initator.
  * For now, the driver just unbinds the DID and port_role so that
  * no further IO can be issued.  Changes are planned for later.
  *
  * Notes - the ndlp reference count is not decremented here since
  * since there is no nvme_transport api for devloss.  Node ref count
  * is only adjusted in driver unload.
  */
 void
 lpfc_nvme_unregister_port(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     int ret;
     struct nvme_fc_local_port *localport;
     struct lpfc_nvme_lport *lport;
     struct lpfc_nvme_rport *rport;
     struct nvme_fc_remote_port *remoteport = NULL;
 
     localport = vport->localport;
 
     /* This is fundamental error.  The localport is always
      * available until driver unload.  Just exit.
      */
     if (!localport)
         return;
 
     lport = (struct lpfc_nvme_lport *)localport->private;
     if (!lport)
         goto input_err;
 
     spin_lock_irq(&ndlp->lock);
     rport = lpfc_ndlp_get_nrport(ndlp);
     if (rport)
         remoteport = rport->remoteport;
     spin_unlock_irq(&ndlp->lock);
     if (!remoteport)
         goto input_err;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_DISC,
              "6033 Unreg nvme remoteport x%px, portname x%llx, "
              "port_id x%06x, portstate x%x port type x%x "
              "refcnt %d\n",
              remoteport, remoteport->port_name,
              remoteport->port_id, remoteport->port_state,
              ndlp->nlp_type, kref_read(&ndlp->kref));
 
     /* Sanity check ndlp type.  Only call for NVME ports. Don't
      * clear any rport state until the transport calls back.
      */
 
     if (ndlp->nlp_type & NLP_NVME_TARGET) {
         /* No concern about the role change on the nvme remoteport.
          * The transport will update it.
          */
         spin_lock_irq(&vport->phba->hbalock);
         ndlp->fc4_xpt_flags |= NVME_XPT_UNREG_WAIT;
         spin_unlock_irq(&vport->phba->hbalock);
 
         /* Don't let the host nvme transport keep sending keep-alives
          * on this remoteport. Vport is unloading, no recovery. The
          * return values is ignored.  The upcall is a courtesy to the
          * transport.
          */
         if (vport->load_flag & FC_UNLOADING)
             (void)nvme_fc_set_remoteport_devloss(remoteport, 0);
 
         ret = nvme_fc_unregister_remoteport(remoteport);
 
         /* The driver no longer knows if the nrport memory is valid.
          * because the controller teardown process has begun and
          * is asynchronous.  Break the binding in the ndlp. Also
          * remove the register ndlp reference to setup node release.
          */
         ndlp->nrport = NULL;
         lpfc_nlp_put(ndlp);
         if (ret != 0) {
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "6167 NVME unregister failed %d "
                      "port_state x%x\n",
                      ret, remoteport->port_state);
         }
     }
     return;
 
  input_err:
 #endif
     lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
              "6168 State error: lport x%px, rport x%px FCID x%06x\n",
              vport->localport, ndlp->rport, ndlp->nlp_DID);
 }
 
 /**
  * lpfc_sli4_nvme_pci_offline_aborted - Fast-path process of NVME xri abort
  * @phba: pointer to lpfc hba data structure.
  * @lpfc_ncmd: The nvme job structure for the request being aborted.
  *
  * This routine is invoked by the worker thread to process a SLI4 fast-path
  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
  * here.
  **/
 void
 lpfc_sli4_nvme_pci_offline_aborted(struct lpfc_hba *phba,
                    struct lpfc_io_buf *lpfc_ncmd)
 {
     struct nvmefc_fcp_req *nvme_cmd = NULL;
 
     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
             "6533 %s nvme_cmd %p tag x%x abort complete and "
             "xri released\n", __func__,
             lpfc_ncmd->nvmeCmd,
             lpfc_ncmd->cur_iocbq.iotag);
 
     /* Aborted NVME commands are required to not complete
      * before the abort exchange command fully completes.
      * Once completed, it is available via the put list.
      */
     if (lpfc_ncmd->nvmeCmd) {
         nvme_cmd = lpfc_ncmd->nvmeCmd;
         nvme_cmd->transferred_length = 0;
         nvme_cmd->rcv_rsplen = 0;
         nvme_cmd->status = NVME_SC_INTERNAL;
         nvme_cmd->done(nvme_cmd);
         lpfc_ncmd->nvmeCmd = NULL;
     }
     lpfc_release_nvme_buf(phba, lpfc_ncmd);
 }
 
 /**
  * lpfc_sli4_nvme_xri_aborted - Fast-path process of NVME xri abort
  * @phba: pointer to lpfc hba data structure.
  * @axri: pointer to the fcp xri abort wcqe structure.
  * @lpfc_ncmd: The nvme job structure for the request being aborted.
  *
  * This routine is invoked by the worker thread to process a SLI4 fast-path
  * NVME aborted xri.  Aborted NVME IO commands are completed to the transport
  * here.
  **/
 void
 lpfc_sli4_nvme_xri_aborted(struct lpfc_hba *phba,
                struct sli4_wcqe_xri_aborted *axri,
                struct lpfc_io_buf *lpfc_ncmd)
 {
     uint16_t xri = bf_get(lpfc_wcqe_xa_xri, axri);
     struct nvmefc_fcp_req *nvme_cmd = NULL;
     struct lpfc_nodelist *ndlp = lpfc_ncmd->ndlp;
 
 
     if (ndlp)
         lpfc_sli4_abts_err_handler(phba, ndlp, axri);
 
     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_ABTS,
             "6311 nvme_cmd %p xri x%x tag x%x abort complete and "
             "xri released\n",
             lpfc_ncmd->nvmeCmd, xri,
             lpfc_ncmd->cur_iocbq.iotag);
 
     /* Aborted NVME commands are required to not complete
      * before the abort exchange command fully completes.
      * Once completed, it is available via the put list.
      */
     if (lpfc_ncmd->nvmeCmd) {
         nvme_cmd = lpfc_ncmd->nvmeCmd;
         nvme_cmd->done(nvme_cmd);
         lpfc_ncmd->nvmeCmd = NULL;
     }
     lpfc_release_nvme_buf(phba, lpfc_ncmd);
 }
 
 /**
  * lpfc_nvme_wait_for_io_drain - Wait for all NVME wqes to complete
  * @phba: Pointer to HBA context object.
  *
  * This function flushes all wqes in the nvme rings and frees all resources
  * in the txcmplq. This function does not issue abort wqes for the IO
  * commands in txcmplq, they will just be returned with
  * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
  * slot has been permanently disabled.
  **/
 void
 lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
 {
     struct lpfc_sli_ring  *pring;
     u32 i, wait_cnt = 0;
 
     if (phba->sli_rev < LPFC_SLI_REV4 || !phba->sli4_hba.hdwq)
         return;
 
     /* Cycle through all IO rings and make sure all outstanding
      * WQEs have been removed from the txcmplqs.
      */
     for (i = 0; i < phba->cfg_hdw_queue; i++) {
         if (!phba->sli4_hba.hdwq[i].io_wq)
             continue;
         pring = phba->sli4_hba.hdwq[i].io_wq->pring;
 
         if (!pring)
             continue;
 
         /* Retrieve everything on the txcmplq */
         while (!list_empty(&pring->txcmplq)) {
             msleep(LPFC_XRI_EXCH_BUSY_WAIT_T1);
             wait_cnt++;
 
             /* The sleep is 10mS.  Every ten seconds,
              * dump a message.  Something is wrong.
              */
             if ((wait_cnt % 1000) == 0) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                         "6178 NVME IO not empty, "
                         "cnt %d\n", wait_cnt);
             }
         }
     }
 
     /* Make sure HBA is alive */
     lpfc_issue_hb_tmo(phba);
 
 }
 
 void
 lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
               uint32_t stat, uint32_t param)
 {
 #if (IS_ENABLED(CONFIG_NVME_FC))
     struct lpfc_io_buf *lpfc_ncmd;
     struct nvmefc_fcp_req *nCmd;
     struct lpfc_wcqe_complete wcqe;
     struct lpfc_wcqe_complete *wcqep = &wcqe;
 
     lpfc_ncmd = pwqeIn->io_buf;
     if (!lpfc_ncmd) {
         lpfc_sli_release_iocbq(phba, pwqeIn);
         return;
     }
     /* For abort iocb just return, IO iocb will do a done call */
     if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) ==
         CMD_ABORT_XRI_CX) {
         lpfc_sli_release_iocbq(phba, pwqeIn);
         return;
     }
 
     spin_lock(&lpfc_ncmd->buf_lock);
     nCmd = lpfc_ncmd->nvmeCmd;
     if (!nCmd) {
         spin_unlock(&lpfc_ncmd->buf_lock);
         lpfc_release_nvme_buf(phba, lpfc_ncmd);
         return;
     }
     spin_unlock(&lpfc_ncmd->buf_lock);
 
     lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
             "6194 NVME Cancel xri %x\n",
             lpfc_ncmd->cur_iocbq.sli4_xritag);
 
     wcqep->word0 = 0;
     bf_set(lpfc_wcqe_c_status, wcqep, stat);
     wcqep->parameter = param;
     wcqep->total_data_placed = 0;
     wcqep->word3 = 0; /* xb is 0 */
 
     /* Call release with XB=1 to queue the IO into the abort list. */
     if (phba->sli.sli_flag & LPFC_SLI_ACTIVE)
         bf_set(lpfc_wcqe_c_xb, wcqep, 1);
 
     memcpy(&pwqeIn->wcqe_cmpl, wcqep, sizeof(*wcqep));
     (pwqeIn->cmd_cmpl)(phba, pwqeIn, pwqeIn);
 #endif
 }