OSCL-LXR linux-6.0.1/​drivers/​scsi/​lpfc/​lpfc_scsi.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/export.h>
 #include <linux/delay.h>
 #include <asm/unaligned.h>
 #include <linux/t10-pi.h>
 #include <linux/crc-t10dif.h>
 #include <linux/blk-cgroup.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 "lpfc_version.h"
 #include "lpfc_hw4.h"
 #include "lpfc_hw.h"
 #include "lpfc_sli.h"
 #include "lpfc_sli4.h"
 #include "lpfc_nl.h"
 #include "lpfc_disc.h"
 #include "lpfc.h"
 #include "lpfc_scsi.h"
 #include "lpfc_logmsg.h"
 #include "lpfc_crtn.h"
 #include "lpfc_vport.h"
 
 #define LPFC_RESET_WAIT  2
 #define LPFC_ABORT_WAIT  2
 
 static char *dif_op_str[] = {
     "PROT_NORMAL",
     "PROT_READ_INSERT",
     "PROT_WRITE_STRIP",
     "PROT_READ_STRIP",
     "PROT_WRITE_INSERT",
     "PROT_READ_PASS",
     "PROT_WRITE_PASS",
 };
 
 struct scsi_dif_tuple {
     __be16 guard_tag;       /* Checksum */
     __be16 app_tag;         /* Opaque storage */
     __be32 ref_tag;         /* Target LBA or indirect LBA */
 };
 
 static struct lpfc_rport_data *
 lpfc_rport_data_from_scsi_device(struct scsi_device *sdev)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *)sdev->host->hostdata;
 
     if (vport->phba->cfg_fof)
         return ((struct lpfc_device_data *)sdev->hostdata)->rport_data;
     else
         return (struct lpfc_rport_data *)sdev->hostdata;
 }
 
 static void
 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
 static void
 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb);
 static int
 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
 
 /**
  * lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
  * @phba: Pointer to HBA object.
  * @lpfc_cmd: lpfc scsi command object pointer.
  *
  * This function is called from the lpfc_prep_task_mgmt_cmd function to
  * set the last bit in the response sge entry.
  **/
 static void
 lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
                 struct lpfc_io_buf *lpfc_cmd)
 {
     struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
     if (sgl) {
         sgl += 1;
         sgl->word2 = le32_to_cpu(sgl->word2);
         bf_set(lpfc_sli4_sge_last, sgl, 1);
         sgl->word2 = cpu_to_le32(sgl->word2);
     }
 }
 
 #define LPFC_INVALID_REFTAG ((u32)-1)
 
 /**
  * lpfc_update_stats - Update statistical data for the command completion
  * @vport: The virtual port on which this call is executing.
  * @lpfc_cmd: lpfc scsi command object pointer.
  *
  * This function is called when there is a command completion and this
  * function updates the statistical data for the command completion.
  **/
 static void
 lpfc_update_stats(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
 {
     struct lpfc_hba *phba = vport->phba;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *pnode;
     struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
     unsigned long flags;
     struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
     unsigned long latency;
     int i;
 
     if (!vport->stat_data_enabled ||
         vport->stat_data_blocked ||
         (cmd->result))
         return;
 
     latency = jiffies_to_msecs((long)jiffies - (long)lpfc_cmd->start_time);
     rdata = lpfc_cmd->rdata;
     pnode = rdata->pnode;
 
     spin_lock_irqsave(shost->host_lock, flags);
     if (!pnode ||
         !pnode->lat_data ||
         (phba->bucket_type == LPFC_NO_BUCKET)) {
         spin_unlock_irqrestore(shost->host_lock, flags);
         return;
     }
 
     if (phba->bucket_type == LPFC_LINEAR_BUCKET) {
         i = (latency + phba->bucket_step - 1 - phba->bucket_base)/
             phba->bucket_step;
         /* check array subscript bounds */
         if (i < 0)
             i = 0;
         else if (i >= LPFC_MAX_BUCKET_COUNT)
             i = LPFC_MAX_BUCKET_COUNT - 1;
     } else {
         for (i = 0; i < LPFC_MAX_BUCKET_COUNT-1; i++)
             if (latency <= (phba->bucket_base +
                 ((1<<i)*phba->bucket_step)))
                 break;
     }
 
     pnode->lat_data[i].cmd_count++;
     spin_unlock_irqrestore(shost->host_lock, flags);
 }
 
 /**
  * lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
  * @phba: The Hba for which this call is being executed.
  *
  * This routine is called when there is resource error in driver or firmware.
  * This routine posts WORKER_RAMP_DOWN_QUEUE event for @phba. This routine
  * posts at most 1 event each second. This routine wakes up worker thread of
  * @phba to process WORKER_RAM_DOWN_EVENT event.
  *
  * This routine should be called with no lock held.
  **/
 void
 lpfc_rampdown_queue_depth(struct lpfc_hba *phba)
 {
     unsigned long flags;
     uint32_t evt_posted;
     unsigned long expires;
 
     spin_lock_irqsave(&phba->hbalock, flags);
     atomic_inc(&phba->num_rsrc_err);
     phba->last_rsrc_error_time = jiffies;
 
     expires = phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL;
     if (time_after(expires, jiffies)) {
         spin_unlock_irqrestore(&phba->hbalock, flags);
         return;
     }
 
     phba->last_ramp_down_time = jiffies;
 
     spin_unlock_irqrestore(&phba->hbalock, flags);
 
     spin_lock_irqsave(&phba->pport->work_port_lock, flags);
     evt_posted = phba->pport->work_port_events & WORKER_RAMP_DOWN_QUEUE;
     if (!evt_posted)
         phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
     spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
 
     if (!evt_posted)
         lpfc_worker_wake_up(phba);
     return;
 }
 
 /**
  * lpfc_ramp_down_queue_handler - WORKER_RAMP_DOWN_QUEUE event handler
  * @phba: The Hba for which this call is being executed.
  *
  * This routine is called to  process WORKER_RAMP_DOWN_QUEUE event for worker
  * thread.This routine reduces queue depth for all scsi device on each vport
  * associated with @phba.
  **/
 void
 lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
 {
     struct lpfc_vport **vports;
     struct Scsi_Host  *shost;
     struct scsi_device *sdev;
     unsigned long new_queue_depth;
     unsigned long num_rsrc_err, num_cmd_success;
     int i;
 
     num_rsrc_err = atomic_read(&phba->num_rsrc_err);
     num_cmd_success = atomic_read(&phba->num_cmd_success);
 
     /*
      * The error and success command counters are global per
      * driver instance.  If another handler has already
      * operated on this error event, just exit.
      */
     if (num_rsrc_err == 0)
         return;
 
     vports = lpfc_create_vport_work_array(phba);
     if (vports != NULL)
         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
             shost = lpfc_shost_from_vport(vports[i]);
             shost_for_each_device(sdev, shost) {
                 new_queue_depth =
                     sdev->queue_depth * num_rsrc_err /
                     (num_rsrc_err + num_cmd_success);
                 if (!new_queue_depth)
                     new_queue_depth = sdev->queue_depth - 1;
                 else
                     new_queue_depth = sdev->queue_depth -
                                 new_queue_depth;
                 scsi_change_queue_depth(sdev, new_queue_depth);
             }
         }
     lpfc_destroy_vport_work_array(phba, vports);
     atomic_set(&phba->num_rsrc_err, 0);
     atomic_set(&phba->num_cmd_success, 0);
 }
 
 /**
  * lpfc_scsi_dev_block - set all scsi hosts to block state
  * @phba: Pointer to HBA context object.
  *
  * This function walks vport list and set each SCSI host to block state
  * by invoking fc_remote_port_delete() routine. This function is invoked
  * with EEH when device's PCI slot has been permanently disabled.
  **/
 void
 lpfc_scsi_dev_block(struct lpfc_hba *phba)
 {
     struct lpfc_vport **vports;
     struct Scsi_Host  *shost;
     struct scsi_device *sdev;
     struct fc_rport *rport;
     int i;
 
     vports = lpfc_create_vport_work_array(phba);
     if (vports != NULL)
         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
             shost = lpfc_shost_from_vport(vports[i]);
             shost_for_each_device(sdev, shost) {
                 rport = starget_to_rport(scsi_target(sdev));
                 fc_remote_port_delete(rport);
             }
         }
     lpfc_destroy_vport_work_array(phba, vports);
 }
 
 /**
  * lpfc_new_scsi_buf_s3 - Scsi buffer allocator for HBA with SLI3 IF spec
  * @vport: The virtual port for which this call being executed.
  * @num_to_alloc: The requested number of buffers to allocate.
  *
  * This routine allocates a scsi buffer for device with SLI-3 interface spec,
  * the scsi buffer contains all the necessary information needed to initiate
  * a SCSI I/O. The non-DMAable buffer region contains information to build
  * the IOCB. The DMAable region contains memory for the FCP CMND, FCP RSP,
  * and the initial BPL. In addition to allocating memory, the FCP CMND and
  * FCP RSP BDEs are setup in the BPL and the BPL BDE is setup in the IOCB.
  *
  * Return codes:
  *   int - number of scsi buffers that were allocated.
  *   0 = failure, less than num_to_alloc is a partial failure.
  **/
 static int
 lpfc_new_scsi_buf_s3(struct lpfc_vport *vport, int num_to_alloc)
 {
     struct lpfc_hba *phba = vport->phba;
     struct lpfc_io_buf *psb;
     struct ulp_bde64 *bpl;
     IOCB_t *iocb;
     dma_addr_t pdma_phys_fcp_cmd;
     dma_addr_t pdma_phys_fcp_rsp;
     dma_addr_t pdma_phys_sgl;
     uint16_t iotag;
     int bcnt, bpl_size;
 
     bpl_size = phba->cfg_sg_dma_buf_size -
         (sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
              "9067 ALLOC %d scsi_bufs: %d (%d + %d + %d)\n",
              num_to_alloc, phba->cfg_sg_dma_buf_size,
              (int)sizeof(struct fcp_cmnd),
              (int)sizeof(struct fcp_rsp), bpl_size);
 
     for (bcnt = 0; bcnt < num_to_alloc; bcnt++) {
         psb = kzalloc(sizeof(struct lpfc_io_buf), GFP_KERNEL);
         if (!psb)
             break;
 
         /*
          * Get memory from the pci pool to map the virt space to pci
          * bus space for an I/O.  The DMA buffer includes space for the
          * struct fcp_cmnd, struct fcp_rsp and the number of bde's
          * necessary to support the sg_tablesize.
          */
         psb->data = dma_pool_zalloc(phba->lpfc_sg_dma_buf_pool,
                     GFP_KERNEL, &psb->dma_handle);
         if (!psb->data) {
             kfree(psb);
             break;
         }
 
 
         /* Allocate iotag for psb->cur_iocbq. */
         iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
         if (iotag == 0) {
             dma_pool_free(phba->lpfc_sg_dma_buf_pool,
                       psb->data, psb->dma_handle);
             kfree(psb);
             break;
         }
         psb->cur_iocbq.cmd_flag |= LPFC_IO_FCP;
 
         psb->fcp_cmnd = psb->data;
         psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
         psb->dma_sgl = psb->data + sizeof(struct fcp_cmnd) +
             sizeof(struct fcp_rsp);
 
         /* Initialize local short-hand pointers. */
         bpl = (struct ulp_bde64 *)psb->dma_sgl;
         pdma_phys_fcp_cmd = psb->dma_handle;
         pdma_phys_fcp_rsp = psb->dma_handle + sizeof(struct fcp_cmnd);
         pdma_phys_sgl = psb->dma_handle + sizeof(struct fcp_cmnd) +
             sizeof(struct fcp_rsp);
 
         /*
          * The first two bdes are the FCP_CMD and FCP_RSP. The balance
          * are sg list bdes.  Initialize the first two and leave the
          * rest for queuecommand.
          */
         bpl[0].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_cmd));
         bpl[0].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_cmd));
         bpl[0].tus.f.bdeSize = sizeof(struct fcp_cmnd);
         bpl[0].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
         bpl[0].tus.w = le32_to_cpu(bpl[0].tus.w);
 
         /* Setup the physical region for the FCP RSP */
         bpl[1].addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys_fcp_rsp));
         bpl[1].addrLow = le32_to_cpu(putPaddrLow(pdma_phys_fcp_rsp));
         bpl[1].tus.f.bdeSize = sizeof(struct fcp_rsp);
         bpl[1].tus.f.bdeFlags = BUFF_TYPE_BDE_64;
         bpl[1].tus.w = le32_to_cpu(bpl[1].tus.w);
 
         /*
          * Since the IOCB for the FCP I/O is built into this
          * lpfc_scsi_buf, initialize it with all known data now.
          */
         iocb = &psb->cur_iocbq.iocb;
         iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
         if ((phba->sli_rev == 3) &&
                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED)) {
             /* fill in immediate fcp command BDE */
             iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDE_IMMED;
             iocb->un.fcpi64.bdl.bdeSize = sizeof(struct fcp_cmnd);
             iocb->un.fcpi64.bdl.addrLow = offsetof(IOCB_t,
                     unsli3.fcp_ext.icd);
             iocb->un.fcpi64.bdl.addrHigh = 0;
             iocb->ulpBdeCount = 0;
             iocb->ulpLe = 0;
             /* fill in response BDE */
             iocb->unsli3.fcp_ext.rbde.tus.f.bdeFlags =
                             BUFF_TYPE_BDE_64;
             iocb->unsli3.fcp_ext.rbde.tus.f.bdeSize =
                 sizeof(struct fcp_rsp);
             iocb->unsli3.fcp_ext.rbde.addrLow =
                 putPaddrLow(pdma_phys_fcp_rsp);
             iocb->unsli3.fcp_ext.rbde.addrHigh =
                 putPaddrHigh(pdma_phys_fcp_rsp);
         } else {
             iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
             iocb->un.fcpi64.bdl.bdeSize =
                     (2 * sizeof(struct ulp_bde64));
             iocb->un.fcpi64.bdl.addrLow =
                     putPaddrLow(pdma_phys_sgl);
             iocb->un.fcpi64.bdl.addrHigh =
                     putPaddrHigh(pdma_phys_sgl);
             iocb->ulpBdeCount = 1;
             iocb->ulpLe = 1;
         }
         iocb->ulpClass = CLASS3;
         psb->status = IOSTAT_SUCCESS;
         /* Put it back into the SCSI buffer list */
         psb->cur_iocbq.io_buf = psb;
         spin_lock_init(&psb->buf_lock);
         lpfc_release_scsi_buf_s3(phba, psb);
 
     }
 
     return bcnt;
 }
 
 /**
  * lpfc_sli4_vport_delete_fcp_xri_aborted -Remove all ndlp references for vport
  * @vport: pointer to lpfc vport data structure.
  *
  * This routine is invoked by the vport cleanup for deletions and the cleanup
  * for an ndlp on removal.
  **/
 void
 lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 {
     struct lpfc_hba *phba = vport->phba;
     struct lpfc_io_buf *psb, *next_psb;
     struct lpfc_sli4_hdw_queue *qp;
     unsigned long iflag = 0;
     int idx;
 
     if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
         return;
 
     spin_lock_irqsave(&phba->hbalock, iflag);
     for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
         qp = &phba->sli4_hba.hdwq[idx];
 
         spin_lock(&qp->abts_io_buf_list_lock);
         list_for_each_entry_safe(psb, next_psb,
                      &qp->lpfc_abts_io_buf_list, list) {
             if (psb->cur_iocbq.cmd_flag & LPFC_IO_NVME)
                 continue;
 
             if (psb->rdata && psb->rdata->pnode &&
                 psb->rdata->pnode->vport == vport)
                 psb->rdata = NULL;
         }
         spin_unlock(&qp->abts_io_buf_list_lock);
     }
     spin_unlock_irqrestore(&phba->hbalock, iflag);
 }
 
 /**
  * lpfc_sli4_io_xri_aborted - Fast-path process of fcp xri abort
  * @phba: pointer to lpfc hba data structure.
  * @axri: pointer to the fcp xri abort wcqe structure.
  * @idx: index into hdwq
  *
  * This routine is invoked by the worker thread to process a SLI4 fast-path
  * FCP or NVME aborted xri.
  **/
 void
 lpfc_sli4_io_xri_aborted(struct lpfc_hba *phba,
              struct sli4_wcqe_xri_aborted *axri, int idx)
 {
     u16 xri = 0;
     u16 rxid = 0;
     struct lpfc_io_buf *psb, *next_psb;
     struct lpfc_sli4_hdw_queue *qp;
     unsigned long iflag = 0;
     struct lpfc_iocbq *iocbq;
     int i;
     struct lpfc_nodelist *ndlp;
     int rrq_empty = 0;
     struct lpfc_sli_ring *pring = phba->sli4_hba.els_wq->pring;
     struct scsi_cmnd *cmd;
     int offline = 0;
 
     if (!(phba->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
         return;
     offline = pci_channel_offline(phba->pcidev);
     if (!offline) {
         xri = bf_get(lpfc_wcqe_xa_xri, axri);
         rxid = bf_get(lpfc_wcqe_xa_remote_xid, axri);
     }
     qp = &phba->sli4_hba.hdwq[idx];
     spin_lock_irqsave(&phba->hbalock, iflag);
     spin_lock(&qp->abts_io_buf_list_lock);
     list_for_each_entry_safe(psb, next_psb,
         &qp->lpfc_abts_io_buf_list, list) {
         if (offline)
             xri = psb->cur_iocbq.sli4_xritag;
         if (psb->cur_iocbq.sli4_xritag == xri) {
             list_del_init(&psb->list);
             psb->flags &= ~LPFC_SBUF_XBUSY;
             psb->status = IOSTAT_SUCCESS;
             if (psb->cur_iocbq.cmd_flag & LPFC_IO_NVME) {
                 qp->abts_nvme_io_bufs--;
                 spin_unlock(&qp->abts_io_buf_list_lock);
                 spin_unlock_irqrestore(&phba->hbalock, iflag);
                 if (!offline) {
                     lpfc_sli4_nvme_xri_aborted(phba, axri,
                                    psb);
                     return;
                 }
                 lpfc_sli4_nvme_pci_offline_aborted(phba, psb);
                 spin_lock_irqsave(&phba->hbalock, iflag);
                 spin_lock(&qp->abts_io_buf_list_lock);
                 continue;
             }
             qp->abts_scsi_io_bufs--;
             spin_unlock(&qp->abts_io_buf_list_lock);
 
             if (psb->rdata && psb->rdata->pnode)
                 ndlp = psb->rdata->pnode;
             else
                 ndlp = NULL;
 
             rrq_empty = list_empty(&phba->active_rrq_list);
             spin_unlock_irqrestore(&phba->hbalock, iflag);
             if (ndlp && !offline) {
                 lpfc_set_rrq_active(phba, ndlp,
                     psb->cur_iocbq.sli4_lxritag, rxid, 1);
                 lpfc_sli4_abts_err_handler(phba, ndlp, axri);
             }
 
             if (phba->cfg_fcp_wait_abts_rsp || offline) {
                 spin_lock_irqsave(&psb->buf_lock, iflag);
                 cmd = psb->pCmd;
                 psb->pCmd = NULL;
                 spin_unlock_irqrestore(&psb->buf_lock, iflag);
 
                 /* The sdev is not guaranteed to be valid post
                  * scsi_done upcall.
                  */
                 if (cmd)
                     scsi_done(cmd);
 
                 /*
                  * We expect there is an abort thread waiting
                  * for command completion wake up the thread.
                  */
                 spin_lock_irqsave(&psb->buf_lock, iflag);
                 psb->cur_iocbq.cmd_flag &=
                     ~LPFC_DRIVER_ABORTED;
                 if (psb->waitq)
                     wake_up(psb->waitq);
                 spin_unlock_irqrestore(&psb->buf_lock, iflag);
             }
 
             lpfc_release_scsi_buf_s4(phba, psb);
             if (rrq_empty)
                 lpfc_worker_wake_up(phba);
             if (!offline)
                 return;
             spin_lock_irqsave(&phba->hbalock, iflag);
             spin_lock(&qp->abts_io_buf_list_lock);
             continue;
         }
     }
     spin_unlock(&qp->abts_io_buf_list_lock);
     if (!offline) {
         for (i = 1; i <= phba->sli.last_iotag; i++) {
             iocbq = phba->sli.iocbq_lookup[i];
 
             if (!(iocbq->cmd_flag & LPFC_IO_FCP) ||
                 (iocbq->cmd_flag & LPFC_IO_LIBDFC))
                 continue;
             if (iocbq->sli4_xritag != xri)
                 continue;
             psb = container_of(iocbq, struct lpfc_io_buf, cur_iocbq);
             psb->flags &= ~LPFC_SBUF_XBUSY;
             spin_unlock_irqrestore(&phba->hbalock, iflag);
             if (!list_empty(&pring->txq))
                 lpfc_worker_wake_up(phba);
             return;
         }
     }
     spin_unlock_irqrestore(&phba->hbalock, iflag);
 }
 
 /**
  * lpfc_get_scsi_buf_s3 - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
  * @phba: The HBA for which this call is being executed.
  * @ndlp: pointer to a node-list data structure.
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
  * and returns to caller.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_scsi_buf - Success
  **/
 static struct lpfc_io_buf *
 lpfc_get_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
              struct scsi_cmnd *cmnd)
 {
     struct lpfc_io_buf *lpfc_cmd = NULL;
     struct list_head *scsi_buf_list_get = &phba->lpfc_scsi_buf_list_get;
     unsigned long iflag = 0;
 
     spin_lock_irqsave(&phba->scsi_buf_list_get_lock, iflag);
     list_remove_head(scsi_buf_list_get, lpfc_cmd, struct lpfc_io_buf,
              list);
     if (!lpfc_cmd) {
         spin_lock(&phba->scsi_buf_list_put_lock);
         list_splice(&phba->lpfc_scsi_buf_list_put,
                 &phba->lpfc_scsi_buf_list_get);
         INIT_LIST_HEAD(&phba->lpfc_scsi_buf_list_put);
         list_remove_head(scsi_buf_list_get, lpfc_cmd,
                  struct lpfc_io_buf, list);
         spin_unlock(&phba->scsi_buf_list_put_lock);
     }
     spin_unlock_irqrestore(&phba->scsi_buf_list_get_lock, iflag);
 
     if (lpfc_ndlp_check_qdepth(phba, ndlp) && lpfc_cmd) {
         atomic_inc(&ndlp->cmd_pending);
         lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
     }
     return  lpfc_cmd;
 }
 /**
  * lpfc_get_scsi_buf_s4 - Get a scsi buffer from io_buf_list of the HBA
  * @phba: The HBA for which this call is being executed.
  * @ndlp: pointer to a node-list data structure.
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine removes a scsi buffer from head of @hdwq io_buf_list
  * and returns to caller.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_scsi_buf - Success
  **/
 static struct lpfc_io_buf *
 lpfc_get_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
              struct scsi_cmnd *cmnd)
 {
     struct lpfc_io_buf *lpfc_cmd;
     struct lpfc_sli4_hdw_queue *qp;
     struct sli4_sge *sgl;
     dma_addr_t pdma_phys_fcp_rsp;
     dma_addr_t pdma_phys_fcp_cmd;
     uint32_t cpu, idx;
     int tag;
     struct fcp_cmd_rsp_buf *tmp = NULL;
 
     cpu = raw_smp_processor_id();
     if (cmnd && phba->cfg_fcp_io_sched == LPFC_FCP_SCHED_BY_HDWQ) {
         tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
         idx = blk_mq_unique_tag_to_hwq(tag);
     } else {
         idx = phba->sli4_hba.cpu_map[cpu].hdwq;
     }
 
     lpfc_cmd = lpfc_get_io_buf(phba, ndlp, idx,
                    !phba->cfg_xri_rebalancing);
     if (!lpfc_cmd) {
         qp = &phba->sli4_hba.hdwq[idx];
         qp->empty_io_bufs++;
         return NULL;
     }
 
     /* Setup key fields in buffer that may have been changed
      * if other protocols used this buffer.
      */
     lpfc_cmd->cur_iocbq.cmd_flag = LPFC_IO_FCP;
     lpfc_cmd->prot_seg_cnt = 0;
     lpfc_cmd->seg_cnt = 0;
     lpfc_cmd->timeout = 0;
     lpfc_cmd->flags = 0;
     lpfc_cmd->start_time = jiffies;
     lpfc_cmd->waitq = NULL;
     lpfc_cmd->cpu = cpu;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     lpfc_cmd->prot_data_type = 0;
 #endif
     tmp = lpfc_get_cmd_rsp_buf_per_hdwq(phba, lpfc_cmd);
     if (!tmp) {
         lpfc_release_io_buf(phba, lpfc_cmd, lpfc_cmd->hdwq);
         return NULL;
     }
 
     lpfc_cmd->fcp_cmnd = tmp->fcp_cmnd;
     lpfc_cmd->fcp_rsp = tmp->fcp_rsp;
 
     /*
      * The first two SGEs are the FCP_CMD and FCP_RSP.
      * The balance are sg list bdes. Initialize the
      * first two and leave the rest for queuecommand.
      */
     sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
     pdma_phys_fcp_cmd = tmp->fcp_cmd_rsp_dma_handle;
     sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_cmd));
     sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_cmd));
     sgl->word2 = le32_to_cpu(sgl->word2);
     bf_set(lpfc_sli4_sge_last, sgl, 0);
     sgl->word2 = cpu_to_le32(sgl->word2);
     sgl->sge_len = cpu_to_le32(sizeof(struct fcp_cmnd));
     sgl++;
 
     /* Setup the physical region for the FCP RSP */
     pdma_phys_fcp_rsp = pdma_phys_fcp_cmd + sizeof(struct fcp_cmnd);
     sgl->addr_hi = cpu_to_le32(putPaddrHigh(pdma_phys_fcp_rsp));
     sgl->addr_lo = cpu_to_le32(putPaddrLow(pdma_phys_fcp_rsp));
     sgl->word2 = le32_to_cpu(sgl->word2);
     bf_set(lpfc_sli4_sge_last, sgl, 1);
     sgl->word2 = cpu_to_le32(sgl->word2);
     sgl->sge_len = cpu_to_le32(sizeof(struct fcp_rsp));
 
     if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
         atomic_inc(&ndlp->cmd_pending);
         lpfc_cmd->flags |= LPFC_SBUF_BUMP_QDEPTH;
     }
     return  lpfc_cmd;
 }
 /**
  * lpfc_get_scsi_buf - Get a scsi buffer from lpfc_scsi_buf_list of the HBA
  * @phba: The HBA for which this call is being executed.
  * @ndlp: pointer to a node-list data structure.
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine removes a scsi buffer from head of @phba lpfc_scsi_buf_list list
  * and returns to caller.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_scsi_buf - Success
  **/
 static struct lpfc_io_buf*
 lpfc_get_scsi_buf(struct lpfc_hba *phba, struct lpfc_nodelist *ndlp,
           struct scsi_cmnd *cmnd)
 {
     return  phba->lpfc_get_scsi_buf(phba, ndlp, cmnd);
 }
 
 /**
  * lpfc_release_scsi_buf_s3 - Return a scsi buffer back to hba scsi buf list
  * @phba: The Hba for which this call is being executed.
  * @psb: The scsi buffer which is being released.
  *
  * This routine releases @psb scsi buffer by adding it to tail of @phba
  * lpfc_scsi_buf_list list.
  **/
 static void
 lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 {
     unsigned long iflag = 0;
 
     psb->seg_cnt = 0;
     psb->prot_seg_cnt = 0;
 
     spin_lock_irqsave(&phba->scsi_buf_list_put_lock, iflag);
     psb->pCmd = NULL;
     psb->cur_iocbq.cmd_flag = LPFC_IO_FCP;
     list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list_put);
     spin_unlock_irqrestore(&phba->scsi_buf_list_put_lock, iflag);
 }
 
 /**
  * lpfc_release_scsi_buf_s4: Return a scsi buffer back to hba scsi buf list.
  * @phba: The Hba for which this call is being executed.
  * @psb: The scsi buffer which is being released.
  *
  * This routine releases @psb scsi buffer by adding it to tail of @hdwq
  * io_buf_list list. For SLI4 XRI's are tied to the scsi buffer
  * and cannot be reused for at least RA_TOV amount of time if it was
  * aborted.
  **/
 static void
 lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 {
     struct lpfc_sli4_hdw_queue *qp;
     unsigned long iflag = 0;
 
     psb->seg_cnt = 0;
     psb->prot_seg_cnt = 0;
 
     qp = psb->hdwq;
     if (psb->flags & LPFC_SBUF_XBUSY) {
         spin_lock_irqsave(&qp->abts_io_buf_list_lock, iflag);
         if (!phba->cfg_fcp_wait_abts_rsp)
             psb->pCmd = NULL;
         list_add_tail(&psb->list, &qp->lpfc_abts_io_buf_list);
         qp->abts_scsi_io_bufs++;
         spin_unlock_irqrestore(&qp->abts_io_buf_list_lock, iflag);
     } else {
         lpfc_release_io_buf(phba, (struct lpfc_io_buf *)psb, qp);
     }
 }
 
 /**
  * lpfc_release_scsi_buf: Return a scsi buffer back to hba scsi buf list.
  * @phba: The Hba for which this call is being executed.
  * @psb: The scsi buffer which is being released.
  *
  * This routine releases @psb scsi buffer by adding it to tail of @phba
  * lpfc_scsi_buf_list list.
  **/
 static void
 lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 {
     if ((psb->flags & LPFC_SBUF_BUMP_QDEPTH) && psb->ndlp)
         atomic_dec(&psb->ndlp->cmd_pending);
 
     psb->flags &= ~LPFC_SBUF_BUMP_QDEPTH;
     phba->lpfc_release_scsi_buf(phba, psb);
 }
 
 /**
  * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
  * @data: A pointer to the immediate command data portion of the IOCB.
  * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
  *
  * The routine copies the entire FCP command from @fcp_cmnd to @data while
  * byte swapping the data to big endian format for transmission on the wire.
  **/
 static void
 lpfc_fcpcmd_to_iocb(u8 *data, struct fcp_cmnd *fcp_cmnd)
 {
     int i, j;
 
     for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
          i += sizeof(uint32_t), j++) {
         ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
     }
 }
 
 /**
  * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  *
  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
  * field of @lpfc_cmd for device with SLI-3 interface spec. This routine scans
  * through sg elements and format the bde. This routine also initializes all
  * IOCB fields which are dependent on scsi command request buffer.
  *
  * Return codes:
  *   1 - Error
  *   0 - Success
  **/
 static int
 lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 {
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct scatterlist *sgel = NULL;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
     struct lpfc_iocbq *iocbq = &lpfc_cmd->cur_iocbq;
     IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
     struct ulp_bde64 *data_bde = iocb_cmd->unsli3.fcp_ext.dbde;
     dma_addr_t physaddr;
     uint32_t num_bde = 0;
     int nseg, datadir = scsi_cmnd->sc_data_direction;
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.  Start the lpfc command prep by
      * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
      * data bde entry.
      */
     bpl += 2;
     if (scsi_sg_count(scsi_cmnd)) {
         /*
          * The driver stores the segment count returned from dma_map_sg
          * because this a count of dma-mappings used to map the use_sg
          * pages.  They are not guaranteed to be the same for those
          * architectures that implement an IOMMU.
          */
 
         nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
                   scsi_sg_count(scsi_cmnd), datadir);
         if (unlikely(!nseg))
             return 1;
 
         lpfc_cmd->seg_cnt = nseg;
         if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9064 BLKGRD: %s: Too many sg segments"
                     " from dma_map_sg.  Config %d, seg_cnt"
                     " %d\n", __func__, phba->cfg_sg_seg_cnt,
                     lpfc_cmd->seg_cnt);
             WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
             lpfc_cmd->seg_cnt = 0;
             scsi_dma_unmap(scsi_cmnd);
             return 2;
         }
 
         /*
          * The driver established a maximum scatter-gather segment count
          * during probe that limits the number of sg elements in any
          * single scsi command.  Just run through the seg_cnt and format
          * the bde's.
          * When using SLI-3 the driver will try to fit all the BDEs into
          * the IOCB. If it can't then the BDEs get added to a BPL as it
          * does for SLI-2 mode.
          */
         scsi_for_each_sg(scsi_cmnd, sgel, nseg, num_bde) {
             physaddr = sg_dma_address(sgel);
             if (phba->sli_rev == 3 &&
                 !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
                 !(iocbq->cmd_flag & DSS_SECURITY_OP) &&
                 nseg <= LPFC_EXT_DATA_BDE_COUNT) {
                 data_bde->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
                 data_bde->tus.f.bdeSize = sg_dma_len(sgel);
                 data_bde->addrLow = putPaddrLow(physaddr);
                 data_bde->addrHigh = putPaddrHigh(physaddr);
                 data_bde++;
             } else {
                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
                 bpl->tus.f.bdeSize = sg_dma_len(sgel);
                 bpl->tus.w = le32_to_cpu(bpl->tus.w);
                 bpl->addrLow =
                     le32_to_cpu(putPaddrLow(physaddr));
                 bpl->addrHigh =
                     le32_to_cpu(putPaddrHigh(physaddr));
                 bpl++;
             }
         }
     }
 
     /*
      * Finish initializing those IOCB fields that are dependent on the
      * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
      * explicitly reinitialized and for SLI-3 the extended bde count is
      * explicitly reinitialized since all iocb memory resources are reused.
      */
     if (phba->sli_rev == 3 &&
         !(phba->sli3_options & LPFC_SLI3_BG_ENABLED) &&
         !(iocbq->cmd_flag & DSS_SECURITY_OP)) {
         if (num_bde > LPFC_EXT_DATA_BDE_COUNT) {
             /*
              * The extended IOCB format can only fit 3 BDE or a BPL.
              * This I/O has more than 3 BDE so the 1st data bde will
              * be a BPL that is filled in here.
              */
             physaddr = lpfc_cmd->dma_handle;
             data_bde->tus.f.bdeFlags = BUFF_TYPE_BLP_64;
             data_bde->tus.f.bdeSize = (num_bde *
                            sizeof(struct ulp_bde64));
             physaddr += (sizeof(struct fcp_cmnd) +
                      sizeof(struct fcp_rsp) +
                      (2 * sizeof(struct ulp_bde64)));
             data_bde->addrHigh = putPaddrHigh(physaddr);
             data_bde->addrLow = putPaddrLow(physaddr);
             /* ebde count includes the response bde and data bpl */
             iocb_cmd->unsli3.fcp_ext.ebde_count = 2;
         } else {
             /* ebde count includes the response bde and data bdes */
             iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
         }
     } else {
         iocb_cmd->un.fcpi64.bdl.bdeSize =
             ((num_bde + 2) * sizeof(struct ulp_bde64));
         iocb_cmd->unsli3.fcp_ext.ebde_count = (num_bde + 1);
     }
     fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
 
     /*
      * Due to difference in data length between DIF/non-DIF paths,
      * we need to set word 4 of IOCB here
      */
     iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
     lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
     return 0;
 }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 
 /* Return BG_ERR_INIT if error injection is detected by Initiator */
 #define BG_ERR_INIT 0x1
 /* Return BG_ERR_TGT if error injection is detected by Target */
 #define BG_ERR_TGT  0x2
 /* Return BG_ERR_SWAP if swapping CSUM<-->CRC is required for error injection */
 #define BG_ERR_SWAP 0x10
 /*
  * Return BG_ERR_CHECK if disabling Guard/Ref/App checking is required for
  * error injection
  */
 #define BG_ERR_CHECK    0x20
 
 /**
  * lpfc_bg_err_inject - Determine if we should inject an error
  * @phba: The Hba for which this call is being executed.
  * @sc: The SCSI command to examine
  * @reftag: (out) BlockGuard reference tag for transmitted data
  * @apptag: (out) BlockGuard application tag for transmitted data
  * @new_guard: (in) Value to replace CRC with if needed
  *
  * Returns BG_ERR_* bit mask or 0 if request ignored
  **/
 static int
 lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         uint32_t *reftag, uint16_t *apptag, uint32_t new_guard)
 {
     struct scatterlist *sgpe; /* s/g prot entry */
     struct lpfc_io_buf *lpfc_cmd = NULL;
     struct scsi_dif_tuple *src = NULL;
     struct lpfc_nodelist *ndlp;
     struct lpfc_rport_data *rdata;
     uint32_t op = scsi_get_prot_op(sc);
     uint32_t blksize;
     uint32_t numblks;
     u32 lba;
     int rc = 0;
     int blockoff = 0;
 
     if (op == SCSI_PROT_NORMAL)
         return 0;
 
     sgpe = scsi_prot_sglist(sc);
     lba = scsi_prot_ref_tag(sc);
     if (lba == LPFC_INVALID_REFTAG)
         return 0;
 
     /* First check if we need to match the LBA */
     if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
         blksize = scsi_prot_interval(sc);
         numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
 
         /* Make sure we have the right LBA if one is specified */
         if (phba->lpfc_injerr_lba < (u64)lba ||
             (phba->lpfc_injerr_lba >= (u64)(lba + numblks)))
             return 0;
         if (sgpe) {
             blockoff = phba->lpfc_injerr_lba - (u64)lba;
             numblks = sg_dma_len(sgpe) /
                 sizeof(struct scsi_dif_tuple);
             if (numblks < blockoff)
                 blockoff = numblks;
         }
     }
 
     /* Next check if we need to match the remote NPortID or WWPN */
     rdata = lpfc_rport_data_from_scsi_device(sc->device);
     if (rdata && rdata->pnode) {
         ndlp = rdata->pnode;
 
         /* Make sure we have the right NPortID if one is specified */
         if (phba->lpfc_injerr_nportid  &&
             (phba->lpfc_injerr_nportid != ndlp->nlp_DID))
             return 0;
 
         /*
          * Make sure we have the right WWPN if one is specified.
          * wwn[0] should be a non-zero NAA in a good WWPN.
          */
         if (phba->lpfc_injerr_wwpn.u.wwn[0]  &&
             (memcmp(&ndlp->nlp_portname, &phba->lpfc_injerr_wwpn,
                 sizeof(struct lpfc_name)) != 0))
             return 0;
     }
 
     /* Setup a ptr to the protection data if the SCSI host provides it */
     if (sgpe) {
         src = (struct scsi_dif_tuple *)sg_virt(sgpe);
         src += blockoff;
         lpfc_cmd = (struct lpfc_io_buf *)sc->host_scribble;
     }
 
     /* Should we change the Reference Tag */
     if (reftag) {
         if (phba->lpfc_injerr_wref_cnt) {
             switch (op) {
             case SCSI_PROT_WRITE_PASS:
                 if (src) {
                     /*
                      * For WRITE_PASS, force the error
                      * to be sent on the wire. It should
                      * be detected by the Target.
                      * If blockoff != 0 error will be
                      * inserted in middle of the IO.
                      */
 
                     lpfc_printf_log(phba, KERN_ERR,
                             LOG_TRACE_EVENT,
                     "9076 BLKGRD: Injecting reftag error: "
                     "write lba x%lx + x%x oldrefTag x%x\n",
                     (unsigned long)lba, blockoff,
                     be32_to_cpu(src->ref_tag));
 
                     /*
                      * Save the old ref_tag so we can
                      * restore it on completion.
                      */
                     if (lpfc_cmd) {
                         lpfc_cmd->prot_data_type =
                             LPFC_INJERR_REFTAG;
                         lpfc_cmd->prot_data_segment =
                             src;
                         lpfc_cmd->prot_data =
                             src->ref_tag;
                     }
                     src->ref_tag = cpu_to_be32(0xDEADBEEF);
                     phba->lpfc_injerr_wref_cnt--;
                     if (phba->lpfc_injerr_wref_cnt == 0) {
                         phba->lpfc_injerr_nportid = 0;
                         phba->lpfc_injerr_lba =
                             LPFC_INJERR_LBA_OFF;
                         memset(&phba->lpfc_injerr_wwpn,
                           0, sizeof(struct lpfc_name));
                     }
                     rc = BG_ERR_TGT | BG_ERR_CHECK;
 
                     break;
                 }
                 fallthrough;
             case SCSI_PROT_WRITE_INSERT:
                 /*
                  * For WRITE_INSERT, force the error
                  * to be sent on the wire. It should be
                  * detected by the Target.
                  */
                 /* DEADBEEF will be the reftag on the wire */
                 *reftag = 0xDEADBEEF;
                 phba->lpfc_injerr_wref_cnt--;
                 if (phba->lpfc_injerr_wref_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                     LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_TGT | BG_ERR_CHECK;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9078 BLKGRD: Injecting reftag error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             case SCSI_PROT_WRITE_STRIP:
                 /*
                  * For WRITE_STRIP and WRITE_PASS,
                  * force the error on data
                  * being copied from SLI-Host to SLI-Port.
                  */
                 *reftag = 0xDEADBEEF;
                 phba->lpfc_injerr_wref_cnt--;
                 if (phba->lpfc_injerr_wref_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_INIT;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9077 BLKGRD: Injecting reftag error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             }
         }
         if (phba->lpfc_injerr_rref_cnt) {
             switch (op) {
             case SCSI_PROT_READ_INSERT:
             case SCSI_PROT_READ_STRIP:
             case SCSI_PROT_READ_PASS:
                 /*
                  * For READ_STRIP and READ_PASS, force the
                  * error on data being read off the wire. It
                  * should force an IO error to the driver.
                  */
                 *reftag = 0xDEADBEEF;
                 phba->lpfc_injerr_rref_cnt--;
                 if (phba->lpfc_injerr_rref_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_INIT;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9079 BLKGRD: Injecting reftag error: "
                     "read lba x%lx\n", (unsigned long)lba);
                 break;
             }
         }
     }
 
     /* Should we change the Application Tag */
     if (apptag) {
         if (phba->lpfc_injerr_wapp_cnt) {
             switch (op) {
             case SCSI_PROT_WRITE_PASS:
                 if (src) {
                     /*
                      * For WRITE_PASS, force the error
                      * to be sent on the wire. It should
                      * be detected by the Target.
                      * If blockoff != 0 error will be
                      * inserted in middle of the IO.
                      */
 
                     lpfc_printf_log(phba, KERN_ERR,
                             LOG_TRACE_EVENT,
                     "9080 BLKGRD: Injecting apptag error: "
                     "write lba x%lx + x%x oldappTag x%x\n",
                     (unsigned long)lba, blockoff,
                     be16_to_cpu(src->app_tag));
 
                     /*
                      * Save the old app_tag so we can
                      * restore it on completion.
                      */
                     if (lpfc_cmd) {
                         lpfc_cmd->prot_data_type =
                             LPFC_INJERR_APPTAG;
                         lpfc_cmd->prot_data_segment =
                             src;
                         lpfc_cmd->prot_data =
                             src->app_tag;
                     }
                     src->app_tag = cpu_to_be16(0xDEAD);
                     phba->lpfc_injerr_wapp_cnt--;
                     if (phba->lpfc_injerr_wapp_cnt == 0) {
                         phba->lpfc_injerr_nportid = 0;
                         phba->lpfc_injerr_lba =
                             LPFC_INJERR_LBA_OFF;
                         memset(&phba->lpfc_injerr_wwpn,
                           0, sizeof(struct lpfc_name));
                     }
                     rc = BG_ERR_TGT | BG_ERR_CHECK;
                     break;
                 }
                 fallthrough;
             case SCSI_PROT_WRITE_INSERT:
                 /*
                  * For WRITE_INSERT, force the
                  * error to be sent on the wire. It should be
                  * detected by the Target.
                  */
                 /* DEAD will be the apptag on the wire */
                 *apptag = 0xDEAD;
                 phba->lpfc_injerr_wapp_cnt--;
                 if (phba->lpfc_injerr_wapp_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_TGT | BG_ERR_CHECK;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0813 BLKGRD: Injecting apptag error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             case SCSI_PROT_WRITE_STRIP:
                 /*
                  * For WRITE_STRIP and WRITE_PASS,
                  * force the error on data
                  * being copied from SLI-Host to SLI-Port.
                  */
                 *apptag = 0xDEAD;
                 phba->lpfc_injerr_wapp_cnt--;
                 if (phba->lpfc_injerr_wapp_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_INIT;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0812 BLKGRD: Injecting apptag error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             }
         }
         if (phba->lpfc_injerr_rapp_cnt) {
             switch (op) {
             case SCSI_PROT_READ_INSERT:
             case SCSI_PROT_READ_STRIP:
             case SCSI_PROT_READ_PASS:
                 /*
                  * For READ_STRIP and READ_PASS, force the
                  * error on data being read off the wire. It
                  * should force an IO error to the driver.
                  */
                 *apptag = 0xDEAD;
                 phba->lpfc_injerr_rapp_cnt--;
                 if (phba->lpfc_injerr_rapp_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
                 rc = BG_ERR_INIT;
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0814 BLKGRD: Injecting apptag error: "
                     "read lba x%lx\n", (unsigned long)lba);
                 break;
             }
         }
     }
 
 
     /* Should we change the Guard Tag */
     if (new_guard) {
         if (phba->lpfc_injerr_wgrd_cnt) {
             switch (op) {
             case SCSI_PROT_WRITE_PASS:
                 rc = BG_ERR_CHECK;
                 fallthrough;
 
             case SCSI_PROT_WRITE_INSERT:
                 /*
                  * For WRITE_INSERT, force the
                  * error to be sent on the wire. It should be
                  * detected by the Target.
                  */
                 phba->lpfc_injerr_wgrd_cnt--;
                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
 
                 rc |= BG_ERR_TGT | BG_ERR_SWAP;
                 /* Signals the caller to swap CRC->CSUM */
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0817 BLKGRD: Injecting guard error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             case SCSI_PROT_WRITE_STRIP:
                 /*
                  * For WRITE_STRIP and WRITE_PASS,
                  * force the error on data
                  * being copied from SLI-Host to SLI-Port.
                  */
                 phba->lpfc_injerr_wgrd_cnt--;
                 if (phba->lpfc_injerr_wgrd_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
 
                 rc = BG_ERR_INIT | BG_ERR_SWAP;
                 /* Signals the caller to swap CRC->CSUM */
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0816 BLKGRD: Injecting guard error: "
                     "write lba x%lx\n", (unsigned long)lba);
                 break;
             }
         }
         if (phba->lpfc_injerr_rgrd_cnt) {
             switch (op) {
             case SCSI_PROT_READ_INSERT:
             case SCSI_PROT_READ_STRIP:
             case SCSI_PROT_READ_PASS:
                 /*
                  * For READ_STRIP and READ_PASS, force the
                  * error on data being read off the wire. It
                  * should force an IO error to the driver.
                  */
                 phba->lpfc_injerr_rgrd_cnt--;
                 if (phba->lpfc_injerr_rgrd_cnt == 0) {
                     phba->lpfc_injerr_nportid = 0;
                     phba->lpfc_injerr_lba =
                         LPFC_INJERR_LBA_OFF;
                     memset(&phba->lpfc_injerr_wwpn,
                         0, sizeof(struct lpfc_name));
                 }
 
                 rc = BG_ERR_INIT | BG_ERR_SWAP;
                 /* Signals the caller to swap CRC->CSUM */
 
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "0818 BLKGRD: Injecting guard error: "
                     "read lba x%lx\n", (unsigned long)lba);
             }
         }
     }
 
     return rc;
 }
 #endif
 
 /**
  * lpfc_sc_to_bg_opcodes - Determine the BlockGuard opcodes to be used with
  * the specified SCSI command.
  * @phba: The Hba for which this call is being executed.
  * @sc: The SCSI command to examine
  * @txop: (out) BlockGuard operation for transmitted data
  * @rxop: (out) BlockGuard operation for received data
  *
  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
  *
  **/
 static int
 lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         uint8_t *txop, uint8_t *rxop)
 {
     uint8_t ret = 0;
 
     if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) {
         switch (scsi_get_prot_op(sc)) {
         case SCSI_PROT_READ_INSERT:
         case SCSI_PROT_WRITE_STRIP:
             *rxop = BG_OP_IN_NODIF_OUT_CSUM;
             *txop = BG_OP_IN_CSUM_OUT_NODIF;
             break;
 
         case SCSI_PROT_READ_STRIP:
         case SCSI_PROT_WRITE_INSERT:
             *rxop = BG_OP_IN_CRC_OUT_NODIF;
             *txop = BG_OP_IN_NODIF_OUT_CRC;
             break;
 
         case SCSI_PROT_READ_PASS:
         case SCSI_PROT_WRITE_PASS:
             *rxop = BG_OP_IN_CRC_OUT_CSUM;
             *txop = BG_OP_IN_CSUM_OUT_CRC;
             break;
 
         case SCSI_PROT_NORMAL:
         default:
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                 "9063 BLKGRD: Bad op/guard:%d/IP combination\n",
                     scsi_get_prot_op(sc));
             ret = 1;
             break;
 
         }
     } else {
         switch (scsi_get_prot_op(sc)) {
         case SCSI_PROT_READ_STRIP:
         case SCSI_PROT_WRITE_INSERT:
             *rxop = BG_OP_IN_CRC_OUT_NODIF;
             *txop = BG_OP_IN_NODIF_OUT_CRC;
             break;
 
         case SCSI_PROT_READ_PASS:
         case SCSI_PROT_WRITE_PASS:
             *rxop = BG_OP_IN_CRC_OUT_CRC;
             *txop = BG_OP_IN_CRC_OUT_CRC;
             break;
 
         case SCSI_PROT_READ_INSERT:
         case SCSI_PROT_WRITE_STRIP:
             *rxop = BG_OP_IN_NODIF_OUT_CRC;
             *txop = BG_OP_IN_CRC_OUT_NODIF;
             break;
 
         case SCSI_PROT_NORMAL:
         default:
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                 "9075 BLKGRD: Bad op/guard:%d/CRC combination\n",
                     scsi_get_prot_op(sc));
             ret = 1;
             break;
         }
     }
 
     return ret;
 }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 /**
  * lpfc_bg_err_opcodes - reDetermine the BlockGuard opcodes to be used with
  * the specified SCSI command in order to force a guard tag error.
  * @phba: The Hba for which this call is being executed.
  * @sc: The SCSI command to examine
  * @txop: (out) BlockGuard operation for transmitted data
  * @rxop: (out) BlockGuard operation for received data
  *
  * Returns: zero on success; non-zero if tx and/or rx op cannot be determined
  *
  **/
 static int
 lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         uint8_t *txop, uint8_t *rxop)
 {
 
     if (sc->prot_flags & SCSI_PROT_IP_CHECKSUM) {
         switch (scsi_get_prot_op(sc)) {
         case SCSI_PROT_READ_INSERT:
         case SCSI_PROT_WRITE_STRIP:
             *rxop = BG_OP_IN_NODIF_OUT_CRC;
             *txop = BG_OP_IN_CRC_OUT_NODIF;
             break;
 
         case SCSI_PROT_READ_STRIP:
         case SCSI_PROT_WRITE_INSERT:
             *rxop = BG_OP_IN_CSUM_OUT_NODIF;
             *txop = BG_OP_IN_NODIF_OUT_CSUM;
             break;
 
         case SCSI_PROT_READ_PASS:
         case SCSI_PROT_WRITE_PASS:
             *rxop = BG_OP_IN_CSUM_OUT_CRC;
             *txop = BG_OP_IN_CRC_OUT_CSUM;
             break;
 
         case SCSI_PROT_NORMAL:
         default:
             break;
 
         }
     } else {
         switch (scsi_get_prot_op(sc)) {
         case SCSI_PROT_READ_STRIP:
         case SCSI_PROT_WRITE_INSERT:
             *rxop = BG_OP_IN_CSUM_OUT_NODIF;
             *txop = BG_OP_IN_NODIF_OUT_CSUM;
             break;
 
         case SCSI_PROT_READ_PASS:
         case SCSI_PROT_WRITE_PASS:
             *rxop = BG_OP_IN_CSUM_OUT_CSUM;
             *txop = BG_OP_IN_CSUM_OUT_CSUM;
             break;
 
         case SCSI_PROT_READ_INSERT:
         case SCSI_PROT_WRITE_STRIP:
             *rxop = BG_OP_IN_NODIF_OUT_CSUM;
             *txop = BG_OP_IN_CSUM_OUT_NODIF;
             break;
 
         case SCSI_PROT_NORMAL:
         default:
             break;
         }
     }
 
     return 0;
 }
 #endif
 
 /**
  * lpfc_bg_setup_bpl - Setup BlockGuard BPL with no protection data
  * @phba: The Hba for which this call is being executed.
  * @sc: pointer to scsi command we're working on
  * @bpl: pointer to buffer list for protection groups
  * @datasegcnt: number of segments of data that have been dma mapped
  *
  * This function sets up BPL buffer list for protection groups of
  * type LPFC_PG_TYPE_NO_DIF
  *
  * This is usually used when the HBA is instructed to generate
  * DIFs and insert them into data stream (or strip DIF from
  * incoming data stream)
  *
  * The buffer list consists of just one protection group described
  * below:
  *                                +-------------------------+
  *   start of prot group  -->     |          PDE_5          |
  *                                +-------------------------+
  *                                |          PDE_6          |
  *                                +-------------------------+
  *                                |         Data BDE        |
  *                                +-------------------------+
  *                                |more Data BDE's ... (opt)|
  *                                +-------------------------+
  *
  *
  * Note: Data s/g buffers have been dma mapped
  *
  * Returns the number of BDEs added to the BPL.
  **/
 static int
 lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         struct ulp_bde64 *bpl, int datasegcnt)
 {
     struct scatterlist *sgde = NULL; /* s/g data entry */
     struct lpfc_pde5 *pde5 = NULL;
     struct lpfc_pde6 *pde6 = NULL;
     dma_addr_t physaddr;
     int i = 0, num_bde = 0, status;
     int datadir = sc->sc_data_direction;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     uint32_t rc;
 #endif
     uint32_t checking = 1;
     uint32_t reftag;
     uint8_t txop, rxop;
 
     status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
     if (status)
         goto out;
 
     /* extract some info from the scsi command for pde*/
     reftag = scsi_prot_ref_tag(sc);
     if (reftag == LPFC_INVALID_REFTAG)
         goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
     if (rc) {
         if (rc & BG_ERR_SWAP)
             lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
         if (rc & BG_ERR_CHECK)
             checking = 0;
     }
 #endif
 
     /* setup PDE5 with what we have */
     pde5 = (struct lpfc_pde5 *) bpl;
     memset(pde5, 0, sizeof(struct lpfc_pde5));
     bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
 
     /* Endianness conversion if necessary for PDE5 */
     pde5->word0 = cpu_to_le32(pde5->word0);
     pde5->reftag = cpu_to_le32(reftag);
 
     /* advance bpl and increment bde count */
     num_bde++;
     bpl++;
     pde6 = (struct lpfc_pde6 *) bpl;
 
     /* setup PDE6 with the rest of the info */
     memset(pde6, 0, sizeof(struct lpfc_pde6));
     bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
     bf_set(pde6_optx, pde6, txop);
     bf_set(pde6_oprx, pde6, rxop);
 
     /*
      * We only need to check the data on READs, for WRITEs
      * protection data is automatically generated, not checked.
      */
     if (datadir == DMA_FROM_DEVICE) {
         if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
             bf_set(pde6_ce, pde6, checking);
         else
             bf_set(pde6_ce, pde6, 0);
 
         if (sc->prot_flags & SCSI_PROT_REF_CHECK)
             bf_set(pde6_re, pde6, checking);
         else
             bf_set(pde6_re, pde6, 0);
     }
     bf_set(pde6_ai, pde6, 1);
     bf_set(pde6_ae, pde6, 0);
     bf_set(pde6_apptagval, pde6, 0);
 
     /* Endianness conversion if necessary for PDE6 */
     pde6->word0 = cpu_to_le32(pde6->word0);
     pde6->word1 = cpu_to_le32(pde6->word1);
     pde6->word2 = cpu_to_le32(pde6->word2);
 
     /* advance bpl and increment bde count */
     num_bde++;
     bpl++;
 
     /* assumption: caller has already run dma_map_sg on command data */
     scsi_for_each_sg(sc, sgde, datasegcnt, i) {
         physaddr = sg_dma_address(sgde);
         bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
         bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
         bpl->tus.f.bdeSize = sg_dma_len(sgde);
         if (datadir == DMA_TO_DEVICE)
             bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
         else
             bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
         bpl->tus.w = le32_to_cpu(bpl->tus.w);
         bpl++;
         num_bde++;
     }
 
 out:
     return num_bde;
 }
 
 /**
  * lpfc_bg_setup_bpl_prot - Setup BlockGuard BPL with protection data
  * @phba: The Hba for which this call is being executed.
  * @sc: pointer to scsi command we're working on
  * @bpl: pointer to buffer list for protection groups
  * @datacnt: number of segments of data that have been dma mapped
  * @protcnt: number of segment of protection data that have been dma mapped
  *
  * This function sets up BPL buffer list for protection groups of
  * type LPFC_PG_TYPE_DIF
  *
  * This is usually used when DIFs are in their own buffers,
  * separate from the data. The HBA can then by instructed
  * to place the DIFs in the outgoing stream.  For read operations,
  * The HBA could extract the DIFs and place it in DIF buffers.
  *
  * The buffer list for this type consists of one or more of the
  * protection groups described below:
  *                                    +-------------------------+
  *   start of first prot group  -->   |          PDE_5          |
  *                                    +-------------------------+
  *                                    |          PDE_6          |
  *                                    +-------------------------+
  *                                    |      PDE_7 (Prot BDE)   |
  *                                    +-------------------------+
  *                                    |        Data BDE         |
  *                                    +-------------------------+
  *                                    |more Data BDE's ... (opt)|
  *                                    +-------------------------+
  *   start of new  prot group  -->    |          PDE_5          |
  *                                    +-------------------------+
  *                                    |          ...            |
  *                                    +-------------------------+
  *
  * Note: It is assumed that both data and protection s/g buffers have been
  *       mapped for DMA
  *
  * Returns the number of BDEs added to the BPL.
  **/
 static int
 lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         struct ulp_bde64 *bpl, int datacnt, int protcnt)
 {
     struct scatterlist *sgde = NULL; /* s/g data entry */
     struct scatterlist *sgpe = NULL; /* s/g prot entry */
     struct lpfc_pde5 *pde5 = NULL;
     struct lpfc_pde6 *pde6 = NULL;
     struct lpfc_pde7 *pde7 = NULL;
     dma_addr_t dataphysaddr, protphysaddr;
     unsigned short curr_data = 0, curr_prot = 0;
     unsigned int split_offset;
     unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
     unsigned int protgrp_blks, protgrp_bytes;
     unsigned int remainder, subtotal;
     int status;
     int datadir = sc->sc_data_direction;
     unsigned char pgdone = 0, alldone = 0;
     unsigned blksize;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     uint32_t rc;
 #endif
     uint32_t checking = 1;
     uint32_t reftag;
     uint8_t txop, rxop;
     int num_bde = 0;
 
     sgpe = scsi_prot_sglist(sc);
     sgde = scsi_sglist(sc);
 
     if (!sgpe || !sgde) {
         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                 "9020 Invalid s/g entry: data=x%px prot=x%px\n",
                 sgpe, sgde);
         return 0;
     }
 
     status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
     if (status)
         goto out;
 
     /* extract some info from the scsi command */
     blksize = scsi_prot_interval(sc);
     reftag = scsi_prot_ref_tag(sc);
     if (reftag == LPFC_INVALID_REFTAG)
         goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
     if (rc) {
         if (rc & BG_ERR_SWAP)
             lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
         if (rc & BG_ERR_CHECK)
             checking = 0;
     }
 #endif
 
     split_offset = 0;
     do {
         /* Check to see if we ran out of space */
         if (num_bde >= (phba->cfg_total_seg_cnt - 2))
             return num_bde + 3;
 
         /* setup PDE5 with what we have */
         pde5 = (struct lpfc_pde5 *) bpl;
         memset(pde5, 0, sizeof(struct lpfc_pde5));
         bf_set(pde5_type, pde5, LPFC_PDE5_DESCRIPTOR);
 
         /* Endianness conversion if necessary for PDE5 */
         pde5->word0 = cpu_to_le32(pde5->word0);
         pde5->reftag = cpu_to_le32(reftag);
 
         /* advance bpl and increment bde count */
         num_bde++;
         bpl++;
         pde6 = (struct lpfc_pde6 *) bpl;
 
         /* setup PDE6 with the rest of the info */
         memset(pde6, 0, sizeof(struct lpfc_pde6));
         bf_set(pde6_type, pde6, LPFC_PDE6_DESCRIPTOR);
         bf_set(pde6_optx, pde6, txop);
         bf_set(pde6_oprx, pde6, rxop);
 
         if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
             bf_set(pde6_ce, pde6, checking);
         else
             bf_set(pde6_ce, pde6, 0);
 
         if (sc->prot_flags & SCSI_PROT_REF_CHECK)
             bf_set(pde6_re, pde6, checking);
         else
             bf_set(pde6_re, pde6, 0);
 
         bf_set(pde6_ai, pde6, 1);
         bf_set(pde6_ae, pde6, 0);
         bf_set(pde6_apptagval, pde6, 0);
 
         /* Endianness conversion if necessary for PDE6 */
         pde6->word0 = cpu_to_le32(pde6->word0);
         pde6->word1 = cpu_to_le32(pde6->word1);
         pde6->word2 = cpu_to_le32(pde6->word2);
 
         /* advance bpl and increment bde count */
         num_bde++;
         bpl++;
 
         /* setup the first BDE that points to protection buffer */
         protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
         protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
 
         /* must be integer multiple of the DIF block length */
         BUG_ON(protgroup_len % 8);
 
         pde7 = (struct lpfc_pde7 *) bpl;
         memset(pde7, 0, sizeof(struct lpfc_pde7));
         bf_set(pde7_type, pde7, LPFC_PDE7_DESCRIPTOR);
 
         pde7->addrHigh = le32_to_cpu(putPaddrHigh(protphysaddr));
         pde7->addrLow = le32_to_cpu(putPaddrLow(protphysaddr));
 
         protgrp_blks = protgroup_len / 8;
         protgrp_bytes = protgrp_blks * blksize;
 
         /* check if this pde is crossing the 4K boundary; if so split */
         if ((pde7->addrLow & 0xfff) + protgroup_len > 0x1000) {
             protgroup_remainder = 0x1000 - (pde7->addrLow & 0xfff);
             protgroup_offset += protgroup_remainder;
             protgrp_blks = protgroup_remainder / 8;
             protgrp_bytes = protgrp_blks * blksize;
         } else {
             protgroup_offset = 0;
             curr_prot++;
         }
 
         num_bde++;
 
         /* setup BDE's for data blocks associated with DIF data */
         pgdone = 0;
         subtotal = 0; /* total bytes processed for current prot grp */
         while (!pgdone) {
             /* Check to see if we ran out of space */
             if (num_bde >= phba->cfg_total_seg_cnt)
                 return num_bde + 1;
 
             if (!sgde) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9065 BLKGRD:%s Invalid data segment\n",
                         __func__);
                 return 0;
             }
             bpl++;
             dataphysaddr = sg_dma_address(sgde) + split_offset;
             bpl->addrLow = le32_to_cpu(putPaddrLow(dataphysaddr));
             bpl->addrHigh = le32_to_cpu(putPaddrHigh(dataphysaddr));
 
             remainder = sg_dma_len(sgde) - split_offset;
 
             if ((subtotal + remainder) <= protgrp_bytes) {
                 /* we can use this whole buffer */
                 bpl->tus.f.bdeSize = remainder;
                 split_offset = 0;
 
                 if ((subtotal + remainder) == protgrp_bytes)
                     pgdone = 1;
             } else {
                 /* must split this buffer with next prot grp */
                 bpl->tus.f.bdeSize = protgrp_bytes - subtotal;
                 split_offset += bpl->tus.f.bdeSize;
             }
 
             subtotal += bpl->tus.f.bdeSize;
 
             if (datadir == DMA_TO_DEVICE)
                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
             else
                 bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
             bpl->tus.w = le32_to_cpu(bpl->tus.w);
 
             num_bde++;
             curr_data++;
 
             if (split_offset)
                 break;
 
             /* Move to the next s/g segment if possible */
             sgde = sg_next(sgde);
 
         }
 
         if (protgroup_offset) {
             /* update the reference tag */
             reftag += protgrp_blks;
             bpl++;
             continue;
         }
 
         /* are we done ? */
         if (curr_prot == protcnt) {
             alldone = 1;
         } else if (curr_prot < protcnt) {
             /* advance to next prot buffer */
             sgpe = sg_next(sgpe);
             bpl++;
 
             /* update the reference tag */
             reftag += protgrp_blks;
         } else {
             /* if we're here, we have a bug */
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9054 BLKGRD: bug in %s\n", __func__);
         }
 
     } while (!alldone);
 out:
 
     return num_bde;
 }
 
 /**
  * lpfc_bg_setup_sgl - Setup BlockGuard SGL with no protection data
  * @phba: The Hba for which this call is being executed.
  * @sc: pointer to scsi command we're working on
  * @sgl: pointer to buffer list for protection groups
  * @datasegcnt: number of segments of data that have been dma mapped
  * @lpfc_cmd: lpfc scsi command object pointer.
  *
  * This function sets up SGL buffer list for protection groups of
  * type LPFC_PG_TYPE_NO_DIF
  *
  * This is usually used when the HBA is instructed to generate
  * DIFs and insert them into data stream (or strip DIF from
  * incoming data stream)
  *
  * The buffer list consists of just one protection group described
  * below:
  *                                +-------------------------+
  *   start of prot group  -->     |         DI_SEED         |
  *                                +-------------------------+
  *                                |         Data SGE        |
  *                                +-------------------------+
  *                                |more Data SGE's ... (opt)|
  *                                +-------------------------+
  *
  *
  * Note: Data s/g buffers have been dma mapped
  *
  * Returns the number of SGEs added to the SGL.
  **/
 static int
 lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         struct sli4_sge *sgl, int datasegcnt,
         struct lpfc_io_buf *lpfc_cmd)
 {
     struct scatterlist *sgde = NULL; /* s/g data entry */
     struct sli4_sge_diseed *diseed = NULL;
     dma_addr_t physaddr;
     int i = 0, num_sge = 0, status;
     uint32_t reftag;
     uint8_t txop, rxop;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     uint32_t rc;
 #endif
     uint32_t checking = 1;
     uint32_t dma_len;
     uint32_t dma_offset = 0;
     struct sli4_hybrid_sgl *sgl_xtra = NULL;
     int j;
     bool lsp_just_set = false;
 
     status  = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
     if (status)
         goto out;
 
     /* extract some info from the scsi command for pde*/
     reftag = scsi_prot_ref_tag(sc);
     if (reftag == LPFC_INVALID_REFTAG)
         goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
     if (rc) {
         if (rc & BG_ERR_SWAP)
             lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
         if (rc & BG_ERR_CHECK)
             checking = 0;
     }
 #endif
 
     /* setup DISEED with what we have */
     diseed = (struct sli4_sge_diseed *) sgl;
     memset(diseed, 0, sizeof(struct sli4_sge_diseed));
     bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
 
     /* Endianness conversion if necessary */
     diseed->ref_tag = cpu_to_le32(reftag);
     diseed->ref_tag_tran = diseed->ref_tag;
 
     /*
      * We only need to check the data on READs, for WRITEs
      * protection data is automatically generated, not checked.
      */
     if (sc->sc_data_direction == DMA_FROM_DEVICE) {
         if (sc->prot_flags & SCSI_PROT_GUARD_CHECK)
             bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
         else
             bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
 
         if (sc->prot_flags & SCSI_PROT_REF_CHECK)
             bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
         else
             bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
     }
 
     /* setup DISEED with the rest of the info */
     bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
     bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
 
     bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
     bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
 
     /* Endianness conversion if necessary for DISEED */
     diseed->word2 = cpu_to_le32(diseed->word2);
     diseed->word3 = cpu_to_le32(diseed->word3);
 
     /* advance bpl and increment sge count */
     num_sge++;
     sgl++;
 
     /* assumption: caller has already run dma_map_sg on command data */
     sgde = scsi_sglist(sc);
     j = 3;
     for (i = 0; i < datasegcnt; i++) {
         /* clear it */
         sgl->word2 = 0;
 
         /* do we need to expand the segment */
         if (!lsp_just_set && !((j + 1) % phba->border_sge_num) &&
             ((datasegcnt - 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_cmd);
 
             if (unlikely(!sgl_xtra)) {
                 lpfc_cmd->seg_cnt = 0;
                 return 0;
             }
             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 ((datasegcnt - 1) == i)
                 bf_set(lpfc_sli4_sge_last, sgl, 1);
             physaddr = sg_dma_address(sgde);
             dma_len = sg_dma_len(sgde);
             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;
             sgde = sg_next(sgde);
 
             sgl++;
             num_sge++;
             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++;
 
     }
 
 out:
     return num_sge;
 }
 
 /**
  * lpfc_bg_setup_sgl_prot - Setup BlockGuard SGL with protection data
  * @phba: The Hba for which this call is being executed.
  * @sc: pointer to scsi command we're working on
  * @sgl: pointer to buffer list for protection groups
  * @datacnt: number of segments of data that have been dma mapped
  * @protcnt: number of segment of protection data that have been dma mapped
  * @lpfc_cmd: lpfc scsi command object pointer.
  *
  * This function sets up SGL buffer list for protection groups of
  * type LPFC_PG_TYPE_DIF
  *
  * This is usually used when DIFs are in their own buffers,
  * separate from the data. The HBA can then by instructed
  * to place the DIFs in the outgoing stream.  For read operations,
  * The HBA could extract the DIFs and place it in DIF buffers.
  *
  * The buffer list for this type consists of one or more of the
  * protection groups described below:
  *                                    +-------------------------+
  *   start of first prot group  -->   |         DISEED          |
  *                                    +-------------------------+
  *                                    |      DIF (Prot SGE)     |
  *                                    +-------------------------+
  *                                    |        Data SGE         |
  *                                    +-------------------------+
  *                                    |more Data SGE's ... (opt)|
  *                                    +-------------------------+
  *   start of new  prot group  -->    |         DISEED          |
  *                                    +-------------------------+
  *                                    |          ...            |
  *                                    +-------------------------+
  *
  * Note: It is assumed that both data and protection s/g buffers have been
  *       mapped for DMA
  *
  * Returns the number of SGEs added to the SGL.
  **/
 static int
 lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
         struct sli4_sge *sgl, int datacnt, int protcnt,
         struct lpfc_io_buf *lpfc_cmd)
 {
     struct scatterlist *sgde = NULL; /* s/g data entry */
     struct scatterlist *sgpe = NULL; /* s/g prot entry */
     struct sli4_sge_diseed *diseed = NULL;
     dma_addr_t dataphysaddr, protphysaddr;
     unsigned short curr_data = 0, curr_prot = 0;
     unsigned int split_offset;
     unsigned int protgroup_len, protgroup_offset = 0, protgroup_remainder;
     unsigned int protgrp_blks, protgrp_bytes;
     unsigned int remainder, subtotal;
     int status;
     unsigned char pgdone = 0, alldone = 0;
     unsigned blksize;
     uint32_t reftag;
     uint8_t txop, rxop;
     uint32_t dma_len;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     uint32_t rc;
 #endif
     uint32_t checking = 1;
     uint32_t dma_offset = 0;
     int num_sge = 0, j = 2;
     struct sli4_hybrid_sgl *sgl_xtra = NULL;
 
     sgpe = scsi_prot_sglist(sc);
     sgde = scsi_sglist(sc);
 
     if (!sgpe || !sgde) {
         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                 "9082 Invalid s/g entry: data=x%px prot=x%px\n",
                 sgpe, sgde);
         return 0;
     }
 
     status = lpfc_sc_to_bg_opcodes(phba, sc, &txop, &rxop);
     if (status)
         goto out;
 
     /* extract some info from the scsi command */
     blksize = scsi_prot_interval(sc);
     reftag = scsi_prot_ref_tag(sc);
     if (reftag == LPFC_INVALID_REFTAG)
         goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
     if (rc) {
         if (rc & BG_ERR_SWAP)
             lpfc_bg_err_opcodes(phba, sc, &txop, &rxop);
         if (rc & BG_ERR_CHECK)
             checking = 0;
     }
 #endif
 
     split_offset = 0;
     do {
         /* Check to see if we ran out of space */
         if ((num_sge >= (phba->cfg_total_seg_cnt - 2)) &&
             !(phba->cfg_xpsgl))
             return num_sge + 3;
 
         /* DISEED and DIF have to be together */
         if (!((j + 1) % phba->border_sge_num) ||
             !((j + 2) % phba->border_sge_num) ||
             !((j + 3) % phba->border_sge_num)) {
             sgl->word2 = 0;
 
             /* set LSP type */
             bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_LSP);
 
             sgl_xtra = lpfc_get_sgl_per_hdwq(phba, lpfc_cmd);
 
             if (unlikely(!sgl_xtra)) {
                 goto out;
             } else {
                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
                         sgl_xtra->dma_phys_sgl));
                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
                                sgl_xtra->dma_phys_sgl));
             }
 
             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;
             j = 0;
         }
 
         /* setup DISEED with what we have */
         diseed = (struct sli4_sge_diseed *) sgl;
         memset(diseed, 0, sizeof(struct sli4_sge_diseed));
         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DISEED);
 
         /* Endianness conversion if necessary */
         diseed->ref_tag = cpu_to_le32(reftag);
         diseed->ref_tag_tran = diseed->ref_tag;
 
         if (sc->prot_flags & SCSI_PROT_GUARD_CHECK) {
             bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
         } else {
             bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
             /*
              * When in this mode, the hardware will replace
              * the guard tag from the host with a
              * newly generated good CRC for the wire.
              * Switch to raw mode here to avoid this
              * behavior. What the host sends gets put on the wire.
              */
             if (txop == BG_OP_IN_CRC_OUT_CRC) {
                 txop = BG_OP_RAW_MODE;
                 rxop = BG_OP_RAW_MODE;
             }
         }
 
 
         if (sc->prot_flags & SCSI_PROT_REF_CHECK)
             bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
         else
             bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
 
         /* setup DISEED with the rest of the info */
         bf_set(lpfc_sli4_sge_dif_optx, diseed, txop);
         bf_set(lpfc_sli4_sge_dif_oprx, diseed, rxop);
 
         bf_set(lpfc_sli4_sge_dif_ai, diseed, 1);
         bf_set(lpfc_sli4_sge_dif_me, diseed, 0);
 
         /* Endianness conversion if necessary for DISEED */
         diseed->word2 = cpu_to_le32(diseed->word2);
         diseed->word3 = cpu_to_le32(diseed->word3);
 
         /* advance sgl and increment bde count */
         num_sge++;
 
         sgl++;
         j++;
 
         /* setup the first BDE that points to protection buffer */
         protphysaddr = sg_dma_address(sgpe) + protgroup_offset;
         protgroup_len = sg_dma_len(sgpe) - protgroup_offset;
 
         /* must be integer multiple of the DIF block length */
         BUG_ON(protgroup_len % 8);
 
         /* Now setup DIF SGE */
         sgl->word2 = 0;
         bf_set(lpfc_sli4_sge_type, sgl, LPFC_SGE_TYPE_DIF);
         sgl->addr_hi = le32_to_cpu(putPaddrHigh(protphysaddr));
         sgl->addr_lo = le32_to_cpu(putPaddrLow(protphysaddr));
         sgl->word2 = cpu_to_le32(sgl->word2);
         sgl->sge_len = 0;
 
         protgrp_blks = protgroup_len / 8;
         protgrp_bytes = protgrp_blks * blksize;
 
         /* check if DIF SGE is crossing the 4K boundary; if so split */
         if ((sgl->addr_lo & 0xfff) + protgroup_len > 0x1000) {
             protgroup_remainder = 0x1000 - (sgl->addr_lo & 0xfff);
             protgroup_offset += protgroup_remainder;
             protgrp_blks = protgroup_remainder / 8;
             protgrp_bytes = protgrp_blks * blksize;
         } else {
             protgroup_offset = 0;
             curr_prot++;
         }
 
         num_sge++;
 
         /* setup SGE's for data blocks associated with DIF data */
         pgdone = 0;
         subtotal = 0; /* total bytes processed for current prot grp */
 
         sgl++;
         j++;
 
         while (!pgdone) {
             /* Check to see if we ran out of space */
             if ((num_sge >= phba->cfg_total_seg_cnt) &&
                 !phba->cfg_xpsgl)
                 return num_sge + 1;
 
             if (!sgde) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9086 BLKGRD:%s Invalid data segment\n",
                         __func__);
                 return 0;
             }
 
             if (!((j + 1) % phba->border_sge_num)) {
                 sgl->word2 = 0;
 
                 /* set LSP type */
                 bf_set(lpfc_sli4_sge_type, sgl,
                        LPFC_SGE_TYPE_LSP);
 
                 sgl_xtra = lpfc_get_sgl_per_hdwq(phba,
                                  lpfc_cmd);
 
                 if (unlikely(!sgl_xtra)) {
                     goto out;
                 } else {
                     sgl->addr_lo = cpu_to_le32(
                       putPaddrLow(sgl_xtra->dma_phys_sgl));
                     sgl->addr_hi = cpu_to_le32(
                       putPaddrHigh(sgl_xtra->dma_phys_sgl));
                 }
 
                 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;
             } else {
                 dataphysaddr = sg_dma_address(sgde) +
                                    split_offset;
 
                 remainder = sg_dma_len(sgde) - split_offset;
 
                 if ((subtotal + remainder) <= protgrp_bytes) {
                     /* we can use this whole buffer */
                     dma_len = remainder;
                     split_offset = 0;
 
                     if ((subtotal + remainder) ==
                                   protgrp_bytes)
                         pgdone = 1;
                 } else {
                     /* must split this buffer with next
                      * prot grp
                      */
                     dma_len = protgrp_bytes - subtotal;
                     split_offset += dma_len;
                 }
 
                 subtotal += dma_len;
 
                 sgl->word2 = 0;
                 sgl->addr_lo = cpu_to_le32(putPaddrLow(
                                  dataphysaddr));
                 sgl->addr_hi = cpu_to_le32(putPaddrHigh(
                                  dataphysaddr));
                 bf_set(lpfc_sli4_sge_last, sgl, 0);
                 bf_set(lpfc_sli4_sge_offset, sgl, dma_offset);
                 bf_set(lpfc_sli4_sge_type, sgl,
                        LPFC_SGE_TYPE_DATA);
 
                 sgl->sge_len = cpu_to_le32(dma_len);
                 dma_offset += dma_len;
 
                 num_sge++;
                 curr_data++;
 
                 if (split_offset) {
                     sgl++;
                     j++;
                     break;
                 }
 
                 /* Move to the next s/g segment if possible */
                 sgde = sg_next(sgde);
 
                 sgl++;
             }
 
             j++;
         }
 
         if (protgroup_offset) {
             /* update the reference tag */
             reftag += protgrp_blks;
             continue;
         }
 
         /* are we done ? */
         if (curr_prot == protcnt) {
             /* mark the last SGL */
             sgl--;
             bf_set(lpfc_sli4_sge_last, sgl, 1);
             alldone = 1;
         } else if (curr_prot < protcnt) {
             /* advance to next prot buffer */
             sgpe = sg_next(sgpe);
 
             /* update the reference tag */
             reftag += protgrp_blks;
         } else {
             /* if we're here, we have a bug */
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9085 BLKGRD: bug in %s\n", __func__);
         }
 
     } while (!alldone);
 
 out:
 
     return num_sge;
 }
 
 /**
  * lpfc_prot_group_type - Get prtotection group type of SCSI command
  * @phba: The Hba for which this call is being executed.
  * @sc: pointer to scsi command we're working on
  *
  * Given a SCSI command that supports DIF, determine composition of protection
  * groups involved in setting up buffer lists
  *
  * Returns: Protection group type (with or without DIF)
  *
  **/
 static int
 lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc)
 {
     int ret = LPFC_PG_TYPE_INVALID;
     unsigned char op = scsi_get_prot_op(sc);
 
     switch (op) {
     case SCSI_PROT_READ_STRIP:
     case SCSI_PROT_WRITE_INSERT:
         ret = LPFC_PG_TYPE_NO_DIF;
         break;
     case SCSI_PROT_READ_INSERT:
     case SCSI_PROT_WRITE_STRIP:
     case SCSI_PROT_READ_PASS:
     case SCSI_PROT_WRITE_PASS:
         ret = LPFC_PG_TYPE_DIF_BUF;
         break;
     default:
         if (phba)
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9021 Unsupported protection op:%d\n",
                     op);
         break;
     }
     return ret;
 }
 
 /**
  * lpfc_bg_scsi_adjust_dl - Adjust SCSI data length for BlockGuard
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be adjusted.
  *
  * Adjust the data length to account for how much data
  * is actually on the wire.
  *
  * returns the adjusted data length
  **/
 static int
 lpfc_bg_scsi_adjust_dl(struct lpfc_hba *phba,
                struct lpfc_io_buf *lpfc_cmd)
 {
     struct scsi_cmnd *sc = lpfc_cmd->pCmd;
     int fcpdl;
 
     fcpdl = scsi_bufflen(sc);
 
     /* Check if there is protection data on the wire */
     if (sc->sc_data_direction == DMA_FROM_DEVICE) {
         /* Read check for protection data */
         if (scsi_get_prot_op(sc) ==  SCSI_PROT_READ_INSERT)
             return fcpdl;
 
     } else {
         /* Write check for protection data */
         if (scsi_get_prot_op(sc) ==  SCSI_PROT_WRITE_STRIP)
             return fcpdl;
     }
 
     /*
      * If we are in DIF Type 1 mode every data block has a 8 byte
      * DIF (trailer) attached to it. Must ajust FCP data length
      * to account for the protection data.
      */
     fcpdl += (fcpdl / scsi_prot_interval(sc)) * 8;
 
     return fcpdl;
 }
 
 /**
  * lpfc_bg_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
  *
  * This is the protection/DIF aware version of
  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
  * two functions eventually, but for now, it's here.
  * RETURNS 0 - SUCCESS,
  *         1 - Failed DMA map, retry.
  *         2 - Invalid scsi cmd or prot-type. Do not rety.
  **/
 static int
 lpfc_bg_scsi_prep_dma_buf_s3(struct lpfc_hba *phba,
         struct lpfc_io_buf *lpfc_cmd)
 {
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct ulp_bde64 *bpl = (struct ulp_bde64 *)lpfc_cmd->dma_sgl;
     IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
     uint32_t num_bde = 0;
     int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
     int prot_group_type = 0;
     int fcpdl;
     int ret = 1;
     struct lpfc_vport *vport = phba->pport;
 
     /*
      * Start the lpfc command prep by bumping the bpl beyond fcp_cmnd
      *  fcp_rsp regions to the first data bde entry
      */
     bpl += 2;
     if (scsi_sg_count(scsi_cmnd)) {
         /*
          * The driver stores the segment count returned from dma_map_sg
          * because this a count of dma-mappings used to map the use_sg
          * pages.  They are not guaranteed to be the same for those
          * architectures that implement an IOMMU.
          */
         datasegcnt = dma_map_sg(&phba->pcidev->dev,
                     scsi_sglist(scsi_cmnd),
                     scsi_sg_count(scsi_cmnd), datadir);
         if (unlikely(!datasegcnt))
             return 1;
 
         lpfc_cmd->seg_cnt = datasegcnt;
 
         /* First check if data segment count from SCSI Layer is good */
         if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
             WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
             ret = 2;
             goto err;
         }
 
         prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
 
         switch (prot_group_type) {
         case LPFC_PG_TYPE_NO_DIF:
 
             /* Here we need to add a PDE5 and PDE6 to the count */
             if ((lpfc_cmd->seg_cnt + 2) > phba->cfg_total_seg_cnt) {
                 ret = 2;
                 goto err;
             }
 
             num_bde = lpfc_bg_setup_bpl(phba, scsi_cmnd, bpl,
                     datasegcnt);
             /* we should have 2 or more entries in buffer list */
             if (num_bde < 2) {
                 ret = 2;
                 goto err;
             }
             break;
 
         case LPFC_PG_TYPE_DIF_BUF:
             /*
              * This type indicates that protection buffers are
              * passed to the driver, so that needs to be prepared
              * for DMA
              */
             protsegcnt = dma_map_sg(&phba->pcidev->dev,
                     scsi_prot_sglist(scsi_cmnd),
                     scsi_prot_sg_count(scsi_cmnd), datadir);
             if (unlikely(!protsegcnt)) {
                 scsi_dma_unmap(scsi_cmnd);
                 return 1;
             }
 
             lpfc_cmd->prot_seg_cnt = protsegcnt;
 
             /*
              * There is a minimun of 4 BPLs used for every
              * protection data segment.
              */
             if ((lpfc_cmd->prot_seg_cnt * 4) >
                 (phba->cfg_total_seg_cnt - 2)) {
                 ret = 2;
                 goto err;
             }
 
             num_bde = lpfc_bg_setup_bpl_prot(phba, scsi_cmnd, bpl,
                     datasegcnt, protsegcnt);
             /* we should have 3 or more entries in buffer list */
             if ((num_bde < 3) ||
                 (num_bde > phba->cfg_total_seg_cnt)) {
                 ret = 2;
                 goto err;
             }
             break;
 
         case LPFC_PG_TYPE_INVALID:
         default:
             scsi_dma_unmap(scsi_cmnd);
             lpfc_cmd->seg_cnt = 0;
 
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9022 Unexpected protection group %i\n",
                     prot_group_type);
             return 2;
         }
     }
 
     /*
      * Finish initializing those IOCB fields that are dependent on the
      * scsi_cmnd request_buffer.  Note that the bdeSize is explicitly
      * reinitialized since all iocb memory resources are used many times
      * for transmit, receive, and continuation bpl's.
      */
     iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof(struct ulp_bde64));
     iocb_cmd->un.fcpi64.bdl.bdeSize += (num_bde * sizeof(struct ulp_bde64));
     iocb_cmd->ulpBdeCount = 1;
     iocb_cmd->ulpLe = 1;
 
     fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
     fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
 
     /*
      * Due to difference in data length between DIF/non-DIF paths,
      * we need to set word 4 of IOCB here
      */
     iocb_cmd->un.fcpi.fcpi_parm = fcpdl;
 
     /*
      * For First burst, we may need to adjust the initial transfer
      * length for DIF
      */
     if (iocb_cmd->un.fcpi.fcpi_XRdy &&
         (fcpdl < vport->cfg_first_burst_size))
         iocb_cmd->un.fcpi.fcpi_XRdy = fcpdl;
 
     return 0;
 err:
     if (lpfc_cmd->seg_cnt)
         scsi_dma_unmap(scsi_cmnd);
     if (lpfc_cmd->prot_seg_cnt)
         dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
                  scsi_prot_sg_count(scsi_cmnd),
                  scsi_cmnd->sc_data_direction);
 
     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
             "9023 Cannot setup S/G List for HBA"
             "IO segs %d/%d BPL %d SCSI %d: %d %d\n",
             lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
             phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
             prot_group_type, num_bde);
 
     lpfc_cmd->seg_cnt = 0;
     lpfc_cmd->prot_seg_cnt = 0;
     return ret;
 }
 
 /*
  * This function calcuates the T10 DIF guard tag
  * on the specified data using a CRC algorithmn
  * using crc_t10dif.
  */
 static uint16_t
 lpfc_bg_crc(uint8_t *data, int count)
 {
     uint16_t crc = 0;
     uint16_t x;
 
     crc = crc_t10dif(data, count);
     x = cpu_to_be16(crc);
     return x;
 }
 
 /*
  * This function calcuates the T10 DIF guard tag
  * on the specified data using a CSUM algorithmn
  * using ip_compute_csum.
  */
 static uint16_t
 lpfc_bg_csum(uint8_t *data, int count)
 {
     uint16_t ret;
 
     ret = ip_compute_csum(data, count);
     return ret;
 }
 
 /*
  * This function examines the protection data to try to determine
  * what type of T10-DIF error occurred.
  */
 static void
 lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 {
     struct scatterlist *sgpe; /* s/g prot entry */
     struct scatterlist *sgde; /* s/g data entry */
     struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
     struct scsi_dif_tuple *src = NULL;
     uint8_t *data_src = NULL;
     uint16_t guard_tag;
     uint16_t start_app_tag, app_tag;
     uint32_t start_ref_tag, ref_tag;
     int prot, protsegcnt;
     int err_type, len, data_len;
     int chk_ref, chk_app, chk_guard;
     uint16_t sum;
     unsigned blksize;
 
     err_type = BGS_GUARD_ERR_MASK;
     sum = 0;
     guard_tag = 0;
 
     /* First check to see if there is protection data to examine */
     prot = scsi_get_prot_op(cmd);
     if ((prot == SCSI_PROT_READ_STRIP) ||
         (prot == SCSI_PROT_WRITE_INSERT) ||
         (prot == SCSI_PROT_NORMAL))
         goto out;
 
     /* Currently the driver just supports ref_tag and guard_tag checking */
     chk_ref = 1;
     chk_app = 0;
     chk_guard = 0;
 
     /* Setup a ptr to the protection data provided by the SCSI host */
     sgpe = scsi_prot_sglist(cmd);
     protsegcnt = lpfc_cmd->prot_seg_cnt;
 
     if (sgpe && protsegcnt) {
 
         /*
          * We will only try to verify guard tag if the segment
          * data length is a multiple of the blksize.
          */
         sgde = scsi_sglist(cmd);
         blksize = scsi_prot_interval(cmd);
         data_src = (uint8_t *)sg_virt(sgde);
         data_len = sgde->length;
         if ((data_len & (blksize - 1)) == 0)
             chk_guard = 1;
 
         src = (struct scsi_dif_tuple *)sg_virt(sgpe);
         start_ref_tag = scsi_prot_ref_tag(cmd);
         if (start_ref_tag == LPFC_INVALID_REFTAG)
             goto out;
         start_app_tag = src->app_tag;
         len = sgpe->length;
         while (src && protsegcnt) {
             while (len) {
 
                 /*
                  * First check to see if a protection data
                  * check is valid
                  */
                 if ((src->ref_tag == T10_PI_REF_ESCAPE) ||
                     (src->app_tag == T10_PI_APP_ESCAPE)) {
                     start_ref_tag++;
                     goto skipit;
                 }
 
                 /* First Guard Tag checking */
                 if (chk_guard) {
                     guard_tag = src->guard_tag;
                     if (cmd->prot_flags
                         & SCSI_PROT_IP_CHECKSUM)
                         sum = lpfc_bg_csum(data_src,
                                    blksize);
                     else
                         sum = lpfc_bg_crc(data_src,
                                   blksize);
                     if ((guard_tag != sum)) {
                         err_type = BGS_GUARD_ERR_MASK;
                         goto out;
                     }
                 }
 
                 /* Reference Tag checking */
                 ref_tag = be32_to_cpu(src->ref_tag);
                 if (chk_ref && (ref_tag != start_ref_tag)) {
                     err_type = BGS_REFTAG_ERR_MASK;
                     goto out;
                 }
                 start_ref_tag++;
 
                 /* App Tag checking */
                 app_tag = src->app_tag;
                 if (chk_app && (app_tag != start_app_tag)) {
                     err_type = BGS_APPTAG_ERR_MASK;
                     goto out;
                 }
 skipit:
                 len -= sizeof(struct scsi_dif_tuple);
                 if (len < 0)
                     len = 0;
                 src++;
 
                 data_src += blksize;
                 data_len -= blksize;
 
                 /*
                  * Are we at the end of the Data segment?
                  * The data segment is only used for Guard
                  * tag checking.
                  */
                 if (chk_guard && (data_len == 0)) {
                     chk_guard = 0;
                     sgde = sg_next(sgde);
                     if (!sgde)
                         goto out;
 
                     data_src = (uint8_t *)sg_virt(sgde);
                     data_len = sgde->length;
                     if ((data_len & (blksize - 1)) == 0)
                         chk_guard = 1;
                 }
             }
 
             /* Goto the next Protection data segment */
             sgpe = sg_next(sgpe);
             if (sgpe) {
                 src = (struct scsi_dif_tuple *)sg_virt(sgpe);
                 len = sgpe->length;
             } else {
                 src = NULL;
             }
             protsegcnt--;
         }
     }
 out:
     if (err_type == BGS_GUARD_ERR_MASK) {
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1);
         set_host_byte(cmd, DID_ABORT);
         phba->bg_guard_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9069 BLKGRD: reftag %x grd_tag err %x != %x\n",
                 scsi_prot_ref_tag(cmd),
                 sum, guard_tag);
 
     } else if (err_type == BGS_REFTAG_ERR_MASK) {
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3);
         set_host_byte(cmd, DID_ABORT);
 
         phba->bg_reftag_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9066 BLKGRD: reftag %x ref_tag err %x != %x\n",
                 scsi_prot_ref_tag(cmd),
                 ref_tag, start_ref_tag);
 
     } else if (err_type == BGS_APPTAG_ERR_MASK) {
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2);
         set_host_byte(cmd, DID_ABORT);
 
         phba->bg_apptag_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9041 BLKGRD: reftag %x app_tag err %x != %x\n",
                 scsi_prot_ref_tag(cmd),
                 app_tag, start_app_tag);
     }
 }
 
 /*
  * This function checks for BlockGuard errors detected by
  * the HBA.  In case of errors, the ASC/ASCQ fields in the
  * sense buffer will be set accordingly, paired with
  * ILLEGAL_REQUEST to signal to the kernel that the HBA
  * detected corruption.
  *
  * Returns:
  *  0 - No error found
  *  1 - BlockGuard error found
  * -1 - Internal error (bad profile, ...etc)
  */
 static int
 lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
           struct lpfc_iocbq *pIocbOut)
 {
     struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
     struct sli3_bg_fields *bgf;
     int ret = 0;
     struct lpfc_wcqe_complete *wcqe;
     u32 status;
     u32 bghm = 0;
     u32 bgstat = 0;
     u64 failing_sector = 0;
 
     if (phba->sli_rev == LPFC_SLI_REV4) {
         wcqe = &pIocbOut->wcqe_cmpl;
         status = bf_get(lpfc_wcqe_c_status, wcqe);
 
         if (status == CQE_STATUS_DI_ERROR) {
             /* Guard Check failed */
             if (bf_get(lpfc_wcqe_c_bg_ge, wcqe))
                 bgstat |= BGS_GUARD_ERR_MASK;
 
             /* AppTag Check failed */
             if (bf_get(lpfc_wcqe_c_bg_ae, wcqe))
                 bgstat |= BGS_APPTAG_ERR_MASK;
 
             /* RefTag Check failed */
             if (bf_get(lpfc_wcqe_c_bg_re, wcqe))
                 bgstat |= BGS_REFTAG_ERR_MASK;
 
             /* Check to see if there was any good data before the
              * error
              */
             if (bf_get(lpfc_wcqe_c_bg_tdpv, wcqe)) {
                 bgstat |= BGS_HI_WATER_MARK_PRESENT_MASK;
                 bghm = wcqe->total_data_placed;
             }
 
             /*
              * Set ALL the error bits to indicate we don't know what
              * type of error it is.
              */
             if (!bgstat)
                 bgstat |= (BGS_REFTAG_ERR_MASK |
                        BGS_APPTAG_ERR_MASK |
                        BGS_GUARD_ERR_MASK);
         }
 
     } else {
         bgf = &pIocbOut->iocb.unsli3.sli3_bg;
         bghm = bgf->bghm;
         bgstat = bgf->bgstat;
     }
 
     if (lpfc_bgs_get_invalid_prof(bgstat)) {
         cmd->result = DID_ERROR << 16;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9072 BLKGRD: Invalid BG Profile in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
         ret = (-1);
         goto out;
     }
 
     if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
         cmd->result = DID_ERROR << 16;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9073 BLKGRD: Invalid BG PDIF Block in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
         ret = (-1);
         goto out;
     }
 
     if (lpfc_bgs_get_guard_err(bgstat)) {
         ret = 1;
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x1);
         set_host_byte(cmd, DID_ABORT);
         phba->bg_guard_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9055 BLKGRD: Guard Tag error in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
     }
 
     if (lpfc_bgs_get_reftag_err(bgstat)) {
         ret = 1;
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x3);
         set_host_byte(cmd, DID_ABORT);
         phba->bg_reftag_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9056 BLKGRD: Ref Tag error in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
     }
 
     if (lpfc_bgs_get_apptag_err(bgstat)) {
         ret = 1;
         scsi_build_sense(cmd, 1, ILLEGAL_REQUEST, 0x10, 0x2);
         set_host_byte(cmd, DID_ABORT);
         phba->bg_apptag_err_cnt++;
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9061 BLKGRD: App Tag error in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
     }
 
     if (lpfc_bgs_get_hi_water_mark_present(bgstat)) {
         /*
          * setup sense data descriptor 0 per SPC-4 as an information
          * field, and put the failing LBA in it.
          * This code assumes there was also a guard/app/ref tag error
          * indication.
          */
         cmd->sense_buffer[7] = 0xc;   /* Additional sense length */
         cmd->sense_buffer[8] = 0;     /* Information descriptor type */
         cmd->sense_buffer[9] = 0xa;   /* Additional descriptor length */
         cmd->sense_buffer[10] = 0x80; /* Validity bit */
 
         /* bghm is a "on the wire" FC frame based count */
         switch (scsi_get_prot_op(cmd)) {
         case SCSI_PROT_READ_INSERT:
         case SCSI_PROT_WRITE_STRIP:
             bghm /= cmd->device->sector_size;
             break;
         case SCSI_PROT_READ_STRIP:
         case SCSI_PROT_WRITE_INSERT:
         case SCSI_PROT_READ_PASS:
         case SCSI_PROT_WRITE_PASS:
             bghm /= (cmd->device->sector_size +
                 sizeof(struct scsi_dif_tuple));
             break;
         }
 
         failing_sector = scsi_get_lba(cmd);
         failing_sector += bghm;
 
         /* Descriptor Information */
         put_unaligned_be64(failing_sector, &cmd->sense_buffer[12]);
     }
 
     if (!ret) {
         /* No error was reported - problem in FW? */
         lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
                 "9057 BLKGRD: Unknown error in cmd "
                 "0x%x reftag 0x%x blk cnt 0x%x "
                 "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
                 scsi_prot_ref_tag(cmd),
                 scsi_logical_block_count(cmd), bgstat, bghm);
 
         /* Calculate what type of error it was */
         lpfc_calc_bg_err(phba, lpfc_cmd);
     }
 out:
     return ret;
 }
 
 /**
  * lpfc_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  *
  * This routine does the pci dma mapping for scatter-gather list of scsi cmnd
  * field of @lpfc_cmd for device with SLI-4 interface spec.
  *
  * Return codes:
  *  2 - Error - Do not retry
  *  1 - Error - Retry
  *  0 - Success
  **/
 static int
 lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 {
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct scatterlist *sgel = NULL;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct sli4_sge *sgl = (struct sli4_sge *)lpfc_cmd->dma_sgl;
     struct sli4_sge *first_data_sgl;
     struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
     struct lpfc_vport *vport = phba->pport;
     union lpfc_wqe128 *wqe = &pwqeq->wqe;
     dma_addr_t physaddr;
     uint32_t dma_len;
     uint32_t dma_offset = 0;
     int nseg, i, j;
     struct ulp_bde64 *bde;
     bool lsp_just_set = false;
     struct sli4_hybrid_sgl *sgl_xtra = NULL;
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.  Start the lpfc command prep by
      * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
      * data bde entry.
      */
     if (scsi_sg_count(scsi_cmnd)) {
         /*
          * The driver stores the segment count returned from dma_map_sg
          * because this a count of dma-mappings used to map the use_sg
          * pages.  They are not guaranteed to be the same for those
          * architectures that implement an IOMMU.
          */
 
         nseg = scsi_dma_map(scsi_cmnd);
         if (unlikely(nseg <= 0))
             return 1;
         sgl += 1;
         /* clear the last flag in the fcp_rsp map entry */
         sgl->word2 = le32_to_cpu(sgl->word2);
         bf_set(lpfc_sli4_sge_last, sgl, 0);
         sgl->word2 = cpu_to_le32(sgl->word2);
         sgl += 1;
         first_data_sgl = sgl;
         lpfc_cmd->seg_cnt = nseg;
         if (!phba->cfg_xpsgl &&
             lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9074 BLKGRD:"
                     " %s: Too many sg segments from "
                     "dma_map_sg.  Config %d, seg_cnt %d\n",
                     __func__, phba->cfg_sg_seg_cnt,
                     lpfc_cmd->seg_cnt);
             WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
             lpfc_cmd->seg_cnt = 0;
             scsi_dma_unmap(scsi_cmnd);
             return 2;
         }
 
         /*
          * The driver established a maximum scatter-gather segment count
          * during probe that limits the number of sg elements in any
          * single scsi command.  Just run through the seg_cnt and format
          * the sge's.
          * When using SLI-3 the driver will try to fit all the BDEs into
          * the IOCB. If it can't then the BDEs get added to a BPL as it
          * does for SLI-2 mode.
          */
 
         /* for tracking segment boundaries */
         sgel = scsi_sglist(scsi_cmnd);
         j = 2;
         for (i = 0; i < nseg; i++) {
             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);
 
                 /* do we need to 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_cmd);
 
                     if (unlikely(!sgl_xtra)) {
                         lpfc_cmd->seg_cnt = 0;
                         scsi_dma_unmap(scsi_cmnd);
                         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(sgel);
                 dma_len = sg_dma_len(sgel);
                 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;
                 sgel = sg_next(sgel);
 
                 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.
          * For FCoE, we key off Performance Hints.
          * For FC, we key off lpfc_enable_pbde.
          */
         if (nseg == 1 &&
             ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
              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 {
         sgl += 1;
         /* set the last flag in the fcp_rsp map entry */
         sgl->word2 = le32_to_cpu(sgl->word2);
         bf_set(lpfc_sli4_sge_last, sgl, 1);
         sgl->word2 = cpu_to_le32(sgl->word2);
 
         if ((phba->sli3_options & LPFC_SLI4_PERFH_ENABLED) ||
             phba->cfg_enable_pbde) {
             bde = (struct ulp_bde64 *)
                 &wqe->words[13];
             memset(bde, 0, (sizeof(uint32_t) * 3));
         }
     }
 
     /*
      * Finish initializing those IOCB fields that are dependent on the
      * scsi_cmnd request_buffer.  Note that for SLI-2 the bdeSize is
      * explicitly reinitialized.
      * all iocb memory resources are reused.
      */
     fcp_cmnd->fcpDl = cpu_to_be32(scsi_bufflen(scsi_cmnd));
     /* Set first-burst provided it was successfully negotiated */
     if (!(phba->hba_flag & HBA_FCOE_MODE) &&
         vport->cfg_first_burst_size &&
         scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
         u32 init_len, total_len;
 
         total_len = be32_to_cpu(fcp_cmnd->fcpDl);
         init_len = min(total_len, vport->cfg_first_burst_size);
 
         /* Word 4 & 5 */
         wqe->fcp_iwrite.initial_xfer_len = init_len;
         wqe->fcp_iwrite.total_xfer_len = total_len;
     } else {
         /* Word 4 */
         wqe->fcp_iwrite.total_xfer_len =
             be32_to_cpu(fcp_cmnd->fcpDl);
     }
 
     /*
      * If the OAS driver feature is enabled and the lun is enabled for
      * OAS, set the oas iocb related flags.
      */
     if ((phba->cfg_fof) && ((struct lpfc_device_data *)
         scsi_cmnd->device->hostdata)->oas_enabled) {
         lpfc_cmd->cur_iocbq.cmd_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
         lpfc_cmd->cur_iocbq.priority = ((struct lpfc_device_data *)
             scsi_cmnd->device->hostdata)->priority;
 
         /* Word 10 */
         bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
         bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);
 
         if (lpfc_cmd->cur_iocbq.priority)
             bf_set(wqe_ccp, &wqe->generic.wqe_com,
                    (lpfc_cmd->cur_iocbq.priority << 1));
         else
             bf_set(wqe_ccp, &wqe->generic.wqe_com,
                    (phba->cfg_XLanePriority << 1));
     }
 
     return 0;
 }
 
 /**
  * lpfc_bg_scsi_prep_dma_buf_s4 - DMA mapping for scsi buffer to SLI4 IF spec
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  *
  * This is the protection/DIF aware version of
  * lpfc_scsi_prep_dma_buf(). It may be a good idea to combine the
  * two functions eventually, but for now, it's here
  * Return codes:
  *  2 - Error - Do not retry
  *  1 - Error - Retry
  *  0 - Success
  **/
 static int
 lpfc_bg_scsi_prep_dma_buf_s4(struct lpfc_hba *phba,
         struct lpfc_io_buf *lpfc_cmd)
 {
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct sli4_sge *sgl = (struct sli4_sge *)(lpfc_cmd->dma_sgl);
     struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
     union lpfc_wqe128 *wqe = &pwqeq->wqe;
     uint32_t num_sge = 0;
     int datasegcnt, protsegcnt, datadir = scsi_cmnd->sc_data_direction;
     int prot_group_type = 0;
     int fcpdl;
     int ret = 1;
     struct lpfc_vport *vport = phba->pport;
 
     /*
      * Start the lpfc command prep by bumping the sgl beyond fcp_cmnd
      *  fcp_rsp regions to the first data sge entry
      */
     if (scsi_sg_count(scsi_cmnd)) {
         /*
          * The driver stores the segment count returned from dma_map_sg
          * because this a count of dma-mappings used to map the use_sg
          * pages.  They are not guaranteed to be the same for those
          * architectures that implement an IOMMU.
          */
         datasegcnt = dma_map_sg(&phba->pcidev->dev,
                     scsi_sglist(scsi_cmnd),
                     scsi_sg_count(scsi_cmnd), datadir);
         if (unlikely(!datasegcnt))
             return 1;
 
         sgl += 1;
         /* clear the last flag in the fcp_rsp map entry */
         sgl->word2 = le32_to_cpu(sgl->word2);
         bf_set(lpfc_sli4_sge_last, sgl, 0);
         sgl->word2 = cpu_to_le32(sgl->word2);
 
         sgl += 1;
         lpfc_cmd->seg_cnt = datasegcnt;
 
         /* First check if data segment count from SCSI Layer is good */
         if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt &&
             !phba->cfg_xpsgl) {
             WARN_ON_ONCE(lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt);
             ret = 2;
             goto err;
         }
 
         prot_group_type = lpfc_prot_group_type(phba, scsi_cmnd);
 
         switch (prot_group_type) {
         case LPFC_PG_TYPE_NO_DIF:
             /* Here we need to add a DISEED to the count */
             if (((lpfc_cmd->seg_cnt + 1) >
                     phba->cfg_total_seg_cnt) &&
                 !phba->cfg_xpsgl) {
                 ret = 2;
                 goto err;
             }
 
             num_sge = lpfc_bg_setup_sgl(phba, scsi_cmnd, sgl,
                     datasegcnt, lpfc_cmd);
 
             /* we should have 2 or more entries in buffer list */
             if (num_sge < 2) {
                 ret = 2;
                 goto err;
             }
             break;
 
         case LPFC_PG_TYPE_DIF_BUF:
             /*
              * This type indicates that protection buffers are
              * passed to the driver, so that needs to be prepared
              * for DMA
              */
             protsegcnt = dma_map_sg(&phba->pcidev->dev,
                     scsi_prot_sglist(scsi_cmnd),
                     scsi_prot_sg_count(scsi_cmnd), datadir);
             if (unlikely(!protsegcnt)) {
                 scsi_dma_unmap(scsi_cmnd);
                 return 1;
             }
 
             lpfc_cmd->prot_seg_cnt = protsegcnt;
             /*
              * There is a minimun of 3 SGEs used for every
              * protection data segment.
              */
             if (((lpfc_cmd->prot_seg_cnt * 3) >
                     (phba->cfg_total_seg_cnt - 2)) &&
                 !phba->cfg_xpsgl) {
                 ret = 2;
                 goto err;
             }
 
             num_sge = lpfc_bg_setup_sgl_prot(phba, scsi_cmnd, sgl,
                     datasegcnt, protsegcnt, lpfc_cmd);
 
             /* we should have 3 or more entries in buffer list */
             if (num_sge < 3 ||
                 (num_sge > phba->cfg_total_seg_cnt &&
                  !phba->cfg_xpsgl)) {
                 ret = 2;
                 goto err;
             }
             break;
 
         case LPFC_PG_TYPE_INVALID:
         default:
             scsi_dma_unmap(scsi_cmnd);
             lpfc_cmd->seg_cnt = 0;
 
             lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                     "9083 Unexpected protection group %i\n",
                     prot_group_type);
             return 2;
         }
     }
 
     switch (scsi_get_prot_op(scsi_cmnd)) {
     case SCSI_PROT_WRITE_STRIP:
     case SCSI_PROT_READ_STRIP:
         lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_STRIP;
         break;
     case SCSI_PROT_WRITE_INSERT:
     case SCSI_PROT_READ_INSERT:
         lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_INSERT;
         break;
     case SCSI_PROT_WRITE_PASS:
     case SCSI_PROT_READ_PASS:
         lpfc_cmd->cur_iocbq.cmd_flag |= LPFC_IO_DIF_PASS;
         break;
     }
 
     fcpdl = lpfc_bg_scsi_adjust_dl(phba, lpfc_cmd);
     fcp_cmnd->fcpDl = be32_to_cpu(fcpdl);
 
     /* Set first-burst provided it was successfully negotiated */
     if (!(phba->hba_flag & HBA_FCOE_MODE) &&
         vport->cfg_first_burst_size &&
         scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) {
         u32 init_len, total_len;
 
         total_len = be32_to_cpu(fcp_cmnd->fcpDl);
         init_len = min(total_len, vport->cfg_first_burst_size);
 
         /* Word 4 & 5 */
         wqe->fcp_iwrite.initial_xfer_len = init_len;
         wqe->fcp_iwrite.total_xfer_len = total_len;
     } else {
         /* Word 4 */
         wqe->fcp_iwrite.total_xfer_len =
             be32_to_cpu(fcp_cmnd->fcpDl);
     }
 
     /*
      * If the OAS driver feature is enabled and the lun is enabled for
      * OAS, set the oas iocb related flags.
      */
     if ((phba->cfg_fof) && ((struct lpfc_device_data *)
         scsi_cmnd->device->hostdata)->oas_enabled) {
         lpfc_cmd->cur_iocbq.cmd_flag |= (LPFC_IO_OAS | LPFC_IO_FOF);
 
         /* Word 10 */
         bf_set(wqe_oas, &wqe->generic.wqe_com, 1);
         bf_set(wqe_ccpe, &wqe->generic.wqe_com, 1);
         bf_set(wqe_ccp, &wqe->generic.wqe_com,
                (phba->cfg_XLanePriority << 1));
     }
 
     /* Word 7. DIF Flags */
     if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_PASS)
         bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_PASSTHRU);
     else if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_STRIP)
         bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_STRIP);
     else if (lpfc_cmd->cur_iocbq.cmd_flag & LPFC_IO_DIF_INSERT)
         bf_set(wqe_dif, &wqe->generic.wqe_com, LPFC_WQE_DIF_INSERT);
 
     lpfc_cmd->cur_iocbq.cmd_flag &= ~(LPFC_IO_DIF_PASS |
                  LPFC_IO_DIF_STRIP | LPFC_IO_DIF_INSERT);
 
     return 0;
 err:
     if (lpfc_cmd->seg_cnt)
         scsi_dma_unmap(scsi_cmnd);
     if (lpfc_cmd->prot_seg_cnt)
         dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(scsi_cmnd),
                  scsi_prot_sg_count(scsi_cmnd),
                  scsi_cmnd->sc_data_direction);
 
     lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
             "9084 Cannot setup S/G List for HBA"
             "IO segs %d/%d SGL %d SCSI %d: %d %d\n",
             lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
             phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
             prot_group_type, num_sge);
 
     lpfc_cmd->seg_cnt = 0;
     lpfc_cmd->prot_seg_cnt = 0;
     return ret;
 }
 
 /**
  * lpfc_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  *
  * This routine wraps the actual DMA mapping function pointer from the
  * lpfc_hba struct.
  *
  * Return codes:
  *  1 - Error
  *  0 - Success
  **/
 static inline int
 lpfc_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 {
     return phba->lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
 }
 
 /**
  * lpfc_bg_scsi_prep_dma_buf - Wrapper function for DMA mapping of scsi buffer
  * using BlockGuard.
  * @phba: The Hba for which this call is being executed.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  *
  * This routine wraps the actual DMA mapping function pointer from the
  * lpfc_hba struct.
  *
  * Return codes:
  *  1 - Error
  *  0 - Success
  **/
 static inline int
 lpfc_bg_scsi_prep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
 {
     return phba->lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
 }
 
 /**
  * lpfc_scsi_prep_cmnd_buf - Wrapper function for IOCB/WQE mapping of scsi
  * buffer
  * @vport: Pointer to vport object.
  * @lpfc_cmd: The scsi buffer which is going to be mapped.
  * @tmo: Timeout value for IO
  *
  * This routine initializes IOCB/WQE data structure from scsi command
  *
  * Return codes:
  *  1 - Error
  *  0 - Success
  **/
 static inline int
 lpfc_scsi_prep_cmnd_buf(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
             uint8_t tmo)
 {
     return vport->phba->lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, tmo);
 }
 
 /**
  * lpfc_send_scsi_error_event - Posts an event when there is SCSI error
  * @phba: Pointer to hba context object.
  * @vport: Pointer to vport object.
  * @lpfc_cmd: Pointer to lpfc scsi command which reported the error.
  * @fcpi_parm: FCP Initiator parameter.
  *
  * This function posts an event when there is a SCSI command reporting
  * error from the scsi device.
  **/
 static void
 lpfc_send_scsi_error_event(struct lpfc_hba *phba, struct lpfc_vport *vport,
         struct lpfc_io_buf *lpfc_cmd, uint32_t fcpi_parm) {
     struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
     struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
     uint32_t resp_info = fcprsp->rspStatus2;
     uint32_t scsi_status = fcprsp->rspStatus3;
     struct lpfc_fast_path_event *fast_path_evt = NULL;
     struct lpfc_nodelist *pnode = lpfc_cmd->rdata->pnode;
     unsigned long flags;
 
     if (!pnode)
         return;
 
     /* If there is queuefull or busy condition send a scsi event */
     if ((cmnd->result == SAM_STAT_TASK_SET_FULL) ||
         (cmnd->result == SAM_STAT_BUSY)) {
         fast_path_evt = lpfc_alloc_fast_evt(phba);
         if (!fast_path_evt)
             return;
         fast_path_evt->un.scsi_evt.event_type =
             FC_REG_SCSI_EVENT;
         fast_path_evt->un.scsi_evt.subcategory =
         (cmnd->result == SAM_STAT_TASK_SET_FULL) ?
         LPFC_EVENT_QFULL : LPFC_EVENT_DEVBSY;
         fast_path_evt->un.scsi_evt.lun = cmnd->device->lun;
         memcpy(&fast_path_evt->un.scsi_evt.wwpn,
             &pnode->nlp_portname, sizeof(struct lpfc_name));
         memcpy(&fast_path_evt->un.scsi_evt.wwnn,
             &pnode->nlp_nodename, sizeof(struct lpfc_name));
     } else if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen &&
         ((cmnd->cmnd[0] == READ_10) || (cmnd->cmnd[0] == WRITE_10))) {
         fast_path_evt = lpfc_alloc_fast_evt(phba);
         if (!fast_path_evt)
             return;
         fast_path_evt->un.check_cond_evt.scsi_event.event_type =
             FC_REG_SCSI_EVENT;
         fast_path_evt->un.check_cond_evt.scsi_event.subcategory =
             LPFC_EVENT_CHECK_COND;
         fast_path_evt->un.check_cond_evt.scsi_event.lun =
             cmnd->device->lun;
         memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwpn,
             &pnode->nlp_portname, sizeof(struct lpfc_name));
         memcpy(&fast_path_evt->un.check_cond_evt.scsi_event.wwnn,
             &pnode->nlp_nodename, sizeof(struct lpfc_name));
         fast_path_evt->un.check_cond_evt.sense_key =
             cmnd->sense_buffer[2] & 0xf;
         fast_path_evt->un.check_cond_evt.asc = cmnd->sense_buffer[12];
         fast_path_evt->un.check_cond_evt.ascq = cmnd->sense_buffer[13];
     } else if ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
              fcpi_parm &&
              ((be32_to_cpu(fcprsp->rspResId) != fcpi_parm) ||
             ((scsi_status == SAM_STAT_GOOD) &&
             !(resp_info & (RESID_UNDER | RESID_OVER))))) {
         /*
          * If status is good or resid does not match with fcp_param and
          * there is valid fcpi_parm, then there is a read_check error
          */
         fast_path_evt = lpfc_alloc_fast_evt(phba);
         if (!fast_path_evt)
             return;
         fast_path_evt->un.read_check_error.header.event_type =
             FC_REG_FABRIC_EVENT;
         fast_path_evt->un.read_check_error.header.subcategory =
             LPFC_EVENT_FCPRDCHKERR;
         memcpy(&fast_path_evt->un.read_check_error.header.wwpn,
             &pnode->nlp_portname, sizeof(struct lpfc_name));
         memcpy(&fast_path_evt->un.read_check_error.header.wwnn,
             &pnode->nlp_nodename, sizeof(struct lpfc_name));
         fast_path_evt->un.read_check_error.lun = cmnd->device->lun;
         fast_path_evt->un.read_check_error.opcode = cmnd->cmnd[0];
         fast_path_evt->un.read_check_error.fcpiparam =
             fcpi_parm;
     } else
         return;
 
     fast_path_evt->vport = vport;
     spin_lock_irqsave(&phba->hbalock, flags);
     list_add_tail(&fast_path_evt->work_evt.evt_listp, &phba->work_list);
     spin_unlock_irqrestore(&phba->hbalock, flags);
     lpfc_worker_wake_up(phba);
     return;
 }
 
 /**
  * lpfc_scsi_unprep_dma_buf - Un-map DMA mapping of SG-list for dev
  * @phba: The HBA for which this call is being executed.
  * @psb: The scsi buffer which is going to be un-mapped.
  *
  * This routine does DMA un-mapping of scatter gather list of scsi command
  * field of @lpfc_cmd for device with SLI-3 interface spec.
  **/
 static void
 lpfc_scsi_unprep_dma_buf(struct lpfc_hba *phba, struct lpfc_io_buf *psb)
 {
     /*
      * There are only two special cases to consider.  (1) the scsi command
      * requested scatter-gather usage or (2) the scsi command allocated
      * a request buffer, but did not request use_sg.  There is a third
      * case, but it does not require resource deallocation.
      */
     if (psb->seg_cnt > 0)
         scsi_dma_unmap(psb->pCmd);
     if (psb->prot_seg_cnt > 0)
         dma_unmap_sg(&phba->pcidev->dev, scsi_prot_sglist(psb->pCmd),
                 scsi_prot_sg_count(psb->pCmd),
                 psb->pCmd->sc_data_direction);
 }
 
 /**
  * lpfc_unblock_requests - allow further commands to be queued.
  * @phba: pointer to phba object
  *
  * For single vport, just call scsi_unblock_requests on physical port.
  * For multiple vports, send scsi_unblock_requests for all the vports.
  */
 void
 lpfc_unblock_requests(struct lpfc_hba *phba)
 {
     struct lpfc_vport **vports;
     struct Scsi_Host  *shost;
     int i;
 
     if (phba->sli_rev == LPFC_SLI_REV4 &&
         !phba->sli4_hba.max_cfg_param.vpi_used) {
         shost = lpfc_shost_from_vport(phba->pport);
         scsi_unblock_requests(shost);
         return;
     }
 
     vports = lpfc_create_vport_work_array(phba);
     if (vports != NULL)
         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
             shost = lpfc_shost_from_vport(vports[i]);
             scsi_unblock_requests(shost);
         }
     lpfc_destroy_vport_work_array(phba, vports);
 }
 
 /**
  * lpfc_block_requests - prevent further commands from being queued.
  * @phba: pointer to phba object
  *
  * For single vport, just call scsi_block_requests on physical port.
  * For multiple vports, send scsi_block_requests for all the vports.
  */
 void
 lpfc_block_requests(struct lpfc_hba *phba)
 {
     struct lpfc_vport **vports;
     struct Scsi_Host  *shost;
     int i;
 
     if (atomic_read(&phba->cmf_stop_io))
         return;
 
     if (phba->sli_rev == LPFC_SLI_REV4 &&
         !phba->sli4_hba.max_cfg_param.vpi_used) {
         shost = lpfc_shost_from_vport(phba->pport);
         scsi_block_requests(shost);
         return;
     }
 
     vports = lpfc_create_vport_work_array(phba);
     if (vports != NULL)
         for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) {
             shost = lpfc_shost_from_vport(vports[i]);
             scsi_block_requests(shost);
         }
     lpfc_destroy_vport_work_array(phba, vports);
 }
 
 /**
  * lpfc_update_cmf_cmpl - Adjust CMF counters for IO completion
  * @phba: The HBA for which this call is being executed.
  * @time: The latency of the IO that completed (in ns)
  * @size: The size of the IO that completed
  * @shost: SCSI host the IO completed on (NULL for a NVME IO)
  *
  * The routine adjusts the various Burst and Bandwidth counters used in
  * Congestion management and E2E. If time is set to LPFC_CGN_NOT_SENT,
  * that means the IO was never issued to the HBA, so this routine is
  * just being called to cleanup the counter from a previous
  * lpfc_update_cmf_cmd call.
  */
 int
 lpfc_update_cmf_cmpl(struct lpfc_hba *phba,
              uint64_t time, uint32_t size, struct Scsi_Host *shost)
 {
     struct lpfc_cgn_stat *cgs;
 
     if (time != LPFC_CGN_NOT_SENT) {
         /* lat is ns coming in, save latency in us */
         if (time < 1000)
             time = 1;
         else
             time = div_u64(time + 500, 1000); /* round it */
 
         cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id());
         atomic64_add(size, &cgs->rcv_bytes);
         atomic64_add(time, &cgs->rx_latency);
         atomic_inc(&cgs->rx_io_cnt);
     }
     return 0;
 }
 
 /**
  * lpfc_update_cmf_cmd - Adjust CMF counters for IO submission
  * @phba: The HBA for which this call is being executed.
  * @size: The size of the IO that will be issued
  *
  * The routine adjusts the various Burst and Bandwidth counters used in
  * Congestion management and E2E.
  */
 int
 lpfc_update_cmf_cmd(struct lpfc_hba *phba, uint32_t size)
 {
     uint64_t total;
     struct lpfc_cgn_stat *cgs;
     int cpu;
 
     /* At this point we are either LPFC_CFG_MANAGED or LPFC_CFG_MONITOR */
     if (phba->cmf_active_mode == LPFC_CFG_MANAGED &&
         phba->cmf_max_bytes_per_interval) {
         total = 0;
         for_each_present_cpu(cpu) {
             cgs = per_cpu_ptr(phba->cmf_stat, cpu);
             total += atomic64_read(&cgs->total_bytes);
         }
         if (total >= phba->cmf_max_bytes_per_interval) {
             if (!atomic_xchg(&phba->cmf_bw_wait, 1)) {
                 lpfc_block_requests(phba);
                 phba->cmf_last_ts =
                     lpfc_calc_cmf_latency(phba);
             }
             atomic_inc(&phba->cmf_busy);
             return -EBUSY;
         }
         if (size > atomic_read(&phba->rx_max_read_cnt))
             atomic_set(&phba->rx_max_read_cnt, size);
     }
 
     cgs = per_cpu_ptr(phba->cmf_stat, raw_smp_processor_id());
     atomic64_add(size, &cgs->total_bytes);
     return 0;
 }
 
 /**
  * lpfc_handle_fcp_err - FCP response handler
  * @vport: The virtual port for which this call is being executed.
  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
  * @fcpi_parm: FCP Initiator parameter.
  *
  * This routine is called to process response IOCB with status field
  * IOSTAT_FCP_RSP_ERROR. This routine sets result field of scsi command
  * based upon SCSI and FCP error.
  **/
 static void
 lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
             uint32_t fcpi_parm)
 {
     struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
     struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
     uint32_t resp_info = fcprsp->rspStatus2;
     uint32_t scsi_status = fcprsp->rspStatus3;
     uint32_t *lp;
     uint32_t host_status = DID_OK;
     uint32_t rsplen = 0;
     uint32_t fcpDl;
     uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
 
 
     /*
      *  If this is a task management command, there is no
      *  scsi packet associated with this lpfc_cmd.  The driver
      *  consumes it.
      */
     if (fcpcmd->fcpCntl2) {
         scsi_status = 0;
         goto out;
     }
 
     if (resp_info & RSP_LEN_VALID) {
         rsplen = be32_to_cpu(fcprsp->rspRspLen);
         if (rsplen != 0 && rsplen != 4 && rsplen != 8) {
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "2719 Invalid response length: "
                      "tgt x%x lun x%llx cmnd x%x rsplen "
                      "x%x\n", cmnd->device->id,
                      cmnd->device->lun, cmnd->cmnd[0],
                      rsplen);
             host_status = DID_ERROR;
             goto out;
         }
         if (fcprsp->rspInfo3 != RSP_NO_FAILURE) {
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "2757 Protocol failure detected during "
                  "processing of FCP I/O op: "
                  "tgt x%x lun x%llx cmnd x%x rspInfo3 x%x\n",
                  cmnd->device->id,
                  cmnd->device->lun, cmnd->cmnd[0],
                  fcprsp->rspInfo3);
             host_status = DID_ERROR;
             goto out;
         }
     }
 
     if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
         uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
         if (snslen > SCSI_SENSE_BUFFERSIZE)
             snslen = SCSI_SENSE_BUFFERSIZE;
 
         if (resp_info & RSP_LEN_VALID)
           rsplen = be32_to_cpu(fcprsp->rspRspLen);
         memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
     }
     lp = (uint32_t *)cmnd->sense_buffer;
 
     /* special handling for under run conditions */
     if (!scsi_status && (resp_info & RESID_UNDER)) {
         /* don't log under runs if fcp set... */
         if (vport->cfg_log_verbose & LOG_FCP)
             logit = LOG_FCP_ERROR;
         /* unless operator says so */
         if (vport->cfg_log_verbose & LOG_FCP_UNDER)
             logit = LOG_FCP_UNDER;
     }
 
     lpfc_printf_vlog(vport, KERN_WARNING, logit,
              "9024 FCP command x%x failed: x%x SNS x%x x%x "
              "Data: x%x x%x x%x x%x x%x\n",
              cmnd->cmnd[0], scsi_status,
              be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
              be32_to_cpu(fcprsp->rspResId),
              be32_to_cpu(fcprsp->rspSnsLen),
              be32_to_cpu(fcprsp->rspRspLen),
              fcprsp->rspInfo3);
 
     scsi_set_resid(cmnd, 0);
     fcpDl = be32_to_cpu(fcpcmd->fcpDl);
     if (resp_info & RESID_UNDER) {
         scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
 
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_UNDER,
                  "9025 FCP Underrun, expected %d, "
                  "residual %d Data: x%x x%x x%x\n",
                  fcpDl,
                  scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
                  cmnd->underflow);
 
         /*
          * If there is an under run, check if under run reported by
          * storage array is same as the under run reported by HBA.
          * If this is not same, there is a dropped frame.
          */
         if (fcpi_parm && (scsi_get_resid(cmnd) != fcpi_parm)) {
             lpfc_printf_vlog(vport, KERN_WARNING,
                      LOG_FCP | LOG_FCP_ERROR,
                      "9026 FCP Read Check Error "
                      "and Underrun Data: x%x x%x x%x x%x\n",
                      fcpDl,
                      scsi_get_resid(cmnd), fcpi_parm,
                      cmnd->cmnd[0]);
             scsi_set_resid(cmnd, scsi_bufflen(cmnd));
             host_status = DID_ERROR;
         }
         /*
          * The cmnd->underflow is the minimum number of bytes that must
          * be transferred for this command.  Provided a sense condition
          * is not present, make sure the actual amount transferred is at
          * least the underflow value or fail.
          */
         if (!(resp_info & SNS_LEN_VALID) &&
             (scsi_status == SAM_STAT_GOOD) &&
             (scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
              < cmnd->underflow)) {
             lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                      "9027 FCP command x%x residual "
                      "underrun converted to error "
                      "Data: x%x x%x x%x\n",
                      cmnd->cmnd[0], scsi_bufflen(cmnd),
                      scsi_get_resid(cmnd), cmnd->underflow);
             host_status = DID_ERROR;
         }
     } else if (resp_info & RESID_OVER) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
                  "9028 FCP command x%x residual overrun error. "
                  "Data: x%x x%x\n", cmnd->cmnd[0],
                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
         host_status = DID_ERROR;
 
     /*
      * Check SLI validation that all the transfer was actually done
      * (fcpi_parm should be zero). Apply check only to reads.
      */
     } else if (fcpi_parm) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
                  "9029 FCP %s Check Error Data: "
                  "x%x x%x x%x x%x x%x\n",
                  ((cmnd->sc_data_direction == DMA_FROM_DEVICE) ?
                  "Read" : "Write"),
                  fcpDl, be32_to_cpu(fcprsp->rspResId),
                  fcpi_parm, cmnd->cmnd[0], scsi_status);
 
         /* There is some issue with the LPe12000 that causes it
          * to miscalculate the fcpi_parm and falsely trip this
          * recovery logic.  Detect this case and don't error when true.
          */
         if (fcpi_parm > fcpDl)
             goto out;
 
         switch (scsi_status) {
         case SAM_STAT_GOOD:
         case SAM_STAT_CHECK_CONDITION:
             /* Fabric dropped a data frame. Fail any successful
              * command in which we detected dropped frames.
              * A status of good or some check conditions could
              * be considered a successful command.
              */
             host_status = DID_ERROR;
             break;
         }
         scsi_set_resid(cmnd, scsi_bufflen(cmnd));
     }
 
  out:
     cmnd->result = host_status << 16 | scsi_status;
     lpfc_send_scsi_error_event(vport->phba, vport, lpfc_cmd, fcpi_parm);
 }
 
 /**
  * lpfc_fcp_io_cmd_wqe_cmpl - Complete a FCP IO
  * @phba: The hba for which this call is being executed.
  * @pwqeIn: The command WQE for the scsi cmnd.
  * @pwqeOut: Pointer to driver response WQE object.
  *
  * This routine assigns scsi command result by looking into response WQE
  * status field appropriately. This routine handles QUEUE FULL condition as
  * well by ramping down device queue depth.
  **/
 static void
 lpfc_fcp_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
              struct lpfc_iocbq *pwqeOut)
 {
     struct lpfc_io_buf *lpfc_cmd = pwqeIn->io_buf;
     struct lpfc_wcqe_complete *wcqe = &pwqeOut->wcqe_cmpl;
     struct lpfc_vport *vport = pwqeIn->vport;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *ndlp;
     struct scsi_cmnd *cmd;
     unsigned long flags;
     struct lpfc_fast_path_event *fast_path_evt;
     struct Scsi_Host *shost;
     u32 logit = LOG_FCP;
     u32 status, idx;
     u32 lat;
     u8 wait_xb_clr = 0;
 
     /* Sanity check on return of outstanding command */
     if (!lpfc_cmd) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "9032 Null lpfc_cmd pointer. No "
                  "release, skip completion\n");
         return;
     }
 
     rdata = lpfc_cmd->rdata;
     ndlp = rdata->pnode;
 
     /* Sanity check on return of outstanding command */
     cmd = lpfc_cmd->pCmd;
     if (!cmd) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "9042 I/O completion: Not an active IO\n");
         lpfc_release_scsi_buf(phba, lpfc_cmd);
         return;
     }
     /* Guard against abort handler being called at same time */
     spin_lock(&lpfc_cmd->buf_lock);
     idx = lpfc_cmd->cur_iocbq.hba_wqidx;
     if (phba->sli4_hba.hdwq)
         phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
         this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 #endif
     shost = cmd->device->host;
 
     status = bf_get(lpfc_wcqe_c_status, wcqe);
     lpfc_cmd->status = (status & LPFC_IOCB_STATUS_MASK);
     lpfc_cmd->result = (wcqe->parameter & IOERR_PARAM_MASK);
 
     lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
     if (bf_get(lpfc_wcqe_c_xb, wcqe)) {
         lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
         if (phba->cfg_fcp_wait_abts_rsp)
             wait_xb_clr = 1;
     }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_cmd->prot_data_type) {
         struct scsi_dif_tuple *src = NULL;
 
         src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
         /*
          * Used to restore any changes to protection
          * data for error injection.
          */
         switch (lpfc_cmd->prot_data_type) {
         case LPFC_INJERR_REFTAG:
             src->ref_tag =
                 lpfc_cmd->prot_data;
             break;
         case LPFC_INJERR_APPTAG:
             src->app_tag =
                 (uint16_t)lpfc_cmd->prot_data;
             break;
         case LPFC_INJERR_GUARD:
             src->guard_tag =
                 (uint16_t)lpfc_cmd->prot_data;
             break;
         default:
             break;
         }
 
         lpfc_cmd->prot_data = 0;
         lpfc_cmd->prot_data_type = 0;
         lpfc_cmd->prot_data_segment = NULL;
     }
 #endif
     if (unlikely(lpfc_cmd->status)) {
         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
             (lpfc_cmd->result & IOERR_DRVR_MASK))
             lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
         else if (lpfc_cmd->status >= IOSTAT_CNT)
             lpfc_cmd->status = IOSTAT_DEFAULT;
         if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
             !lpfc_cmd->fcp_rsp->rspStatus3 &&
             (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
             !(vport->cfg_log_verbose & LOG_FCP_UNDER))
             logit = 0;
         else
             logit = LOG_FCP | LOG_FCP_UNDER;
         lpfc_printf_vlog(vport, KERN_WARNING, logit,
                  "9034 FCP cmd x%x failed <%d/%lld> "
                  "status: x%x result: x%x "
                  "sid: x%x did: x%x oxid: x%x "
                  "Data: x%x x%x x%x\n",
                  cmd->cmnd[0],
                  cmd->device ? cmd->device->id : 0xffff,
                  cmd->device ? cmd->device->lun : 0xffff,
                  lpfc_cmd->status, lpfc_cmd->result,
                  vport->fc_myDID,
                  (ndlp) ? ndlp->nlp_DID : 0,
                  lpfc_cmd->cur_iocbq.sli4_xritag,
                  wcqe->parameter, wcqe->total_data_placed,
                  lpfc_cmd->cur_iocbq.iotag);
     }
 
     switch (lpfc_cmd->status) {
     case IOSTAT_SUCCESS:
         cmd->result = DID_OK << 16;
         break;
     case IOSTAT_FCP_RSP_ERROR:
         lpfc_handle_fcp_err(vport, lpfc_cmd,
                     pwqeIn->wqe.fcp_iread.total_xfer_len -
                     wcqe->total_data_placed);
         break;
     case IOSTAT_NPORT_BSY:
     case IOSTAT_FABRIC_BSY:
         cmd->result = DID_TRANSPORT_DISRUPTED << 16;
         fast_path_evt = lpfc_alloc_fast_evt(phba);
         if (!fast_path_evt)
             break;
         fast_path_evt->un.fabric_evt.event_type =
             FC_REG_FABRIC_EVENT;
         fast_path_evt->un.fabric_evt.subcategory =
             (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
             LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
         if (ndlp) {
             memcpy(&fast_path_evt->un.fabric_evt.wwpn,
                    &ndlp->nlp_portname,
                 sizeof(struct lpfc_name));
             memcpy(&fast_path_evt->un.fabric_evt.wwnn,
                    &ndlp->nlp_nodename,
                 sizeof(struct lpfc_name));
         }
         fast_path_evt->vport = vport;
         fast_path_evt->work_evt.evt =
             LPFC_EVT_FASTPATH_MGMT_EVT;
         spin_lock_irqsave(&phba->hbalock, flags);
         list_add_tail(&fast_path_evt->work_evt.evt_listp,
                   &phba->work_list);
         spin_unlock_irqrestore(&phba->hbalock, flags);
         lpfc_worker_wake_up(phba);
         lpfc_printf_vlog(vport, KERN_WARNING, logit,
                  "9035 Fabric/Node busy FCP cmd x%x failed"
                  " <%d/%lld> "
                  "status: x%x result: x%x "
                  "sid: x%x did: x%x oxid: x%x "
                  "Data: x%x x%x x%x\n",
                  cmd->cmnd[0],
                  cmd->device ? cmd->device->id : 0xffff,
                  cmd->device ? cmd->device->lun : 0xffff,
                  lpfc_cmd->status, lpfc_cmd->result,
                  vport->fc_myDID,
                  (ndlp) ? ndlp->nlp_DID : 0,
                  lpfc_cmd->cur_iocbq.sli4_xritag,
                  wcqe->parameter,
                  wcqe->total_data_placed,
                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
         break;
     case IOSTAT_REMOTE_STOP:
         if (ndlp) {
             /* This I/O was aborted by the target, we don't
              * know the rxid and because we did not send the
              * ABTS we cannot generate and RRQ.
              */
             lpfc_set_rrq_active(phba, ndlp,
                         lpfc_cmd->cur_iocbq.sli4_lxritag,
                         0, 0);
         }
         fallthrough;
     case IOSTAT_LOCAL_REJECT:
         if (lpfc_cmd->result & IOERR_DRVR_MASK)
             lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
         if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
             lpfc_cmd->result ==
             IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
             lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
             lpfc_cmd->result ==
             IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
             cmd->result = DID_NO_CONNECT << 16;
             break;
         }
         if (lpfc_cmd->result == IOERR_INVALID_RPI ||
             lpfc_cmd->result == IOERR_LINK_DOWN ||
             lpfc_cmd->result == IOERR_NO_RESOURCES ||
             lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
             lpfc_cmd->result == IOERR_RPI_SUSPENDED ||
             lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
             cmd->result = DID_TRANSPORT_DISRUPTED << 16;
             break;
         }
         if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
              lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
              status == CQE_STATUS_DI_ERROR) {
             if (scsi_get_prot_op(cmd) !=
                 SCSI_PROT_NORMAL) {
                 /*
                  * This is a response for a BG enabled
                  * cmd. Parse BG error
                  */
                 lpfc_parse_bg_err(phba, lpfc_cmd, pwqeOut);
                 break;
             } else {
                 lpfc_printf_vlog(vport, KERN_WARNING,
                          LOG_BG,
                          "9040 non-zero BGSTAT "
                          "on unprotected cmd\n");
             }
         }
         lpfc_printf_vlog(vport, KERN_WARNING, logit,
                  "9036 Local Reject FCP cmd x%x failed"
                  " <%d/%lld> "
                  "status: x%x result: x%x "
                  "sid: x%x did: x%x oxid: x%x "
                  "Data: x%x x%x x%x\n",
                  cmd->cmnd[0],
                  cmd->device ? cmd->device->id : 0xffff,
                  cmd->device ? cmd->device->lun : 0xffff,
                  lpfc_cmd->status, lpfc_cmd->result,
                  vport->fc_myDID,
                  (ndlp) ? ndlp->nlp_DID : 0,
                  lpfc_cmd->cur_iocbq.sli4_xritag,
                  wcqe->parameter,
                  wcqe->total_data_placed,
                  lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
         fallthrough;
     default:
         if (lpfc_cmd->status >= IOSTAT_CNT)
             lpfc_cmd->status = IOSTAT_DEFAULT;
         cmd->result = DID_ERROR << 16;
         lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
                  "9037 FCP Completion Error: xri %x "
                  "status x%x result x%x [x%x] "
                  "placed x%x\n",
                  lpfc_cmd->cur_iocbq.sli4_xritag,
                  lpfc_cmd->status, lpfc_cmd->result,
                  wcqe->parameter,
                  wcqe->total_data_placed);
     }
     if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
         u32 *lp = (u32 *)cmd->sense_buffer;
 
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                  "9039 Iodone <%d/%llu> cmd x%px, error "
                  "x%x SNS x%x x%x LBA x%llx Data: x%x x%x\n",
                  cmd->device->id, cmd->device->lun, cmd,
                  cmd->result, *lp, *(lp + 3),
                  (u64)scsi_get_lba(cmd),
                  cmd->retries, scsi_get_resid(cmd));
     }
 
     lpfc_update_stats(vport, lpfc_cmd);
 
     if (vport->cfg_max_scsicmpl_time &&
         time_after(jiffies, lpfc_cmd->start_time +
         msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
         spin_lock_irqsave(shost->host_lock, flags);
         if (ndlp) {
             if (ndlp->cmd_qdepth >
                 atomic_read(&ndlp->cmd_pending) &&
                 (atomic_read(&ndlp->cmd_pending) >
                 LPFC_MIN_TGT_QDEPTH) &&
                 (cmd->cmnd[0] == READ_10 ||
                 cmd->cmnd[0] == WRITE_10))
                 ndlp->cmd_qdepth =
                     atomic_read(&ndlp->cmd_pending);
 
             ndlp->last_change_time = jiffies;
         }
         spin_unlock_irqrestore(shost->host_lock, flags);
     }
     lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_cmd->ts_cmd_start) {
         lpfc_cmd->ts_isr_cmpl = lpfc_cmd->cur_iocbq.isr_timestamp;
         lpfc_cmd->ts_data_io = ktime_get_ns();
         phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
         lpfc_io_ktime(phba, lpfc_cmd);
     }
 #endif
     if (likely(!wait_xb_clr))
         lpfc_cmd->pCmd = NULL;
     spin_unlock(&lpfc_cmd->buf_lock);
 
     /* Check if IO qualified for CMF */
     if (phba->cmf_active_mode != LPFC_CFG_OFF &&
         cmd->sc_data_direction == DMA_FROM_DEVICE &&
         (scsi_sg_count(cmd))) {
         /* Used when calculating average latency */
         lat = ktime_get_ns() - lpfc_cmd->rx_cmd_start;
         lpfc_update_cmf_cmpl(phba, lat, scsi_bufflen(cmd), shost);
     }
 
     if (wait_xb_clr)
         goto out;
 
     /* The sdev is not guaranteed to be valid post scsi_done upcall. */
     scsi_done(cmd);
 
     /*
      * If there is an abort thread waiting for command completion
      * wake up the thread.
      */
     spin_lock(&lpfc_cmd->buf_lock);
     lpfc_cmd->cur_iocbq.cmd_flag &= ~LPFC_DRIVER_ABORTED;
     if (lpfc_cmd->waitq)
         wake_up(lpfc_cmd->waitq);
     spin_unlock(&lpfc_cmd->buf_lock);
 out:
     lpfc_release_scsi_buf(phba, lpfc_cmd);
 }
 
 /**
  * lpfc_scsi_cmd_iocb_cmpl - Scsi cmnd IOCB completion routine
  * @phba: The Hba for which this call is being executed.
  * @pIocbIn: The command IOCBQ for the scsi cmnd.
  * @pIocbOut: The response IOCBQ for the scsi cmnd.
  *
  * This routine assigns scsi command result by looking into response IOCB
  * status field appropriately. This routine handles QUEUE FULL condition as
  * well by ramping down device queue depth.
  **/
 static void
 lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
             struct lpfc_iocbq *pIocbOut)
 {
     struct lpfc_io_buf *lpfc_cmd =
         (struct lpfc_io_buf *) pIocbIn->io_buf;
     struct lpfc_vport      *vport = pIocbIn->vport;
     struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
     struct lpfc_nodelist *pnode = rdata->pnode;
     struct scsi_cmnd *cmd;
     unsigned long flags;
     struct lpfc_fast_path_event *fast_path_evt;
     struct Scsi_Host *shost;
     int idx;
     uint32_t logit = LOG_FCP;
 
     /* Guard against abort handler being called at same time */
     spin_lock(&lpfc_cmd->buf_lock);
 
     /* Sanity check on return of outstanding command */
     cmd = lpfc_cmd->pCmd;
     if (!cmd || !phba) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "2621 IO completion: Not an active IO\n");
         spin_unlock(&lpfc_cmd->buf_lock);
         return;
     }
 
     idx = lpfc_cmd->cur_iocbq.hba_wqidx;
     if (phba->sli4_hba.hdwq)
         phba->sli4_hba.hdwq[idx].scsi_cstat.io_cmpls++;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
         this_cpu_inc(phba->sli4_hba.c_stat->cmpl_io);
 #endif
     shost = cmd->device->host;
 
     lpfc_cmd->result = (pIocbOut->iocb.un.ulpWord[4] & IOERR_PARAM_MASK);
     lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
     /* pick up SLI4 exchange busy status from HBA */
     lpfc_cmd->flags &= ~LPFC_SBUF_XBUSY;
     if (pIocbOut->cmd_flag & LPFC_EXCHANGE_BUSY)
         lpfc_cmd->flags |= LPFC_SBUF_XBUSY;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_cmd->prot_data_type) {
         struct scsi_dif_tuple *src = NULL;
 
         src =  (struct scsi_dif_tuple *)lpfc_cmd->prot_data_segment;
         /*
          * Used to restore any changes to protection
          * data for error injection.
          */
         switch (lpfc_cmd->prot_data_type) {
         case LPFC_INJERR_REFTAG:
             src->ref_tag =
                 lpfc_cmd->prot_data;
             break;
         case LPFC_INJERR_APPTAG:
             src->app_tag =
                 (uint16_t)lpfc_cmd->prot_data;
             break;
         case LPFC_INJERR_GUARD:
             src->guard_tag =
                 (uint16_t)lpfc_cmd->prot_data;
             break;
         default:
             break;
         }
 
         lpfc_cmd->prot_data = 0;
         lpfc_cmd->prot_data_type = 0;
         lpfc_cmd->prot_data_segment = NULL;
     }
 #endif
 
     if (unlikely(lpfc_cmd->status)) {
         if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
             (lpfc_cmd->result & IOERR_DRVR_MASK))
             lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
         else if (lpfc_cmd->status >= IOSTAT_CNT)
             lpfc_cmd->status = IOSTAT_DEFAULT;
         if (lpfc_cmd->status == IOSTAT_FCP_RSP_ERROR &&
             !lpfc_cmd->fcp_rsp->rspStatus3 &&
             (lpfc_cmd->fcp_rsp->rspStatus2 & RESID_UNDER) &&
             !(vport->cfg_log_verbose & LOG_FCP_UNDER))
             logit = 0;
         else
             logit = LOG_FCP | LOG_FCP_UNDER;
         lpfc_printf_vlog(vport, KERN_WARNING, logit,
              "9030 FCP cmd x%x failed <%d/%lld> "
              "status: x%x result: x%x "
              "sid: x%x did: x%x oxid: x%x "
              "Data: x%x x%x\n",
              cmd->cmnd[0],
              cmd->device ? cmd->device->id : 0xffff,
              cmd->device ? cmd->device->lun : 0xffff,
              lpfc_cmd->status, lpfc_cmd->result,
              vport->fc_myDID,
              (pnode) ? pnode->nlp_DID : 0,
              phba->sli_rev == LPFC_SLI_REV4 ?
                  lpfc_cmd->cur_iocbq.sli4_xritag : 0xffff,
              pIocbOut->iocb.ulpContext,
              lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
 
         switch (lpfc_cmd->status) {
         case IOSTAT_FCP_RSP_ERROR:
             /* Call FCP RSP handler to determine result */
             lpfc_handle_fcp_err(vport, lpfc_cmd,
                         pIocbOut->iocb.un.fcpi.fcpi_parm);
             break;
         case IOSTAT_NPORT_BSY:
         case IOSTAT_FABRIC_BSY:
             cmd->result = DID_TRANSPORT_DISRUPTED << 16;
             fast_path_evt = lpfc_alloc_fast_evt(phba);
             if (!fast_path_evt)
                 break;
             fast_path_evt->un.fabric_evt.event_type =
                 FC_REG_FABRIC_EVENT;
             fast_path_evt->un.fabric_evt.subcategory =
                 (lpfc_cmd->status == IOSTAT_NPORT_BSY) ?
                 LPFC_EVENT_PORT_BUSY : LPFC_EVENT_FABRIC_BUSY;
             if (pnode) {
                 memcpy(&fast_path_evt->un.fabric_evt.wwpn,
                     &pnode->nlp_portname,
                     sizeof(struct lpfc_name));
                 memcpy(&fast_path_evt->un.fabric_evt.wwnn,
                     &pnode->nlp_nodename,
                     sizeof(struct lpfc_name));
             }
             fast_path_evt->vport = vport;
             fast_path_evt->work_evt.evt =
                 LPFC_EVT_FASTPATH_MGMT_EVT;
             spin_lock_irqsave(&phba->hbalock, flags);
             list_add_tail(&fast_path_evt->work_evt.evt_listp,
                 &phba->work_list);
             spin_unlock_irqrestore(&phba->hbalock, flags);
             lpfc_worker_wake_up(phba);
             break;
         case IOSTAT_LOCAL_REJECT:
         case IOSTAT_REMOTE_STOP:
             if (lpfc_cmd->result == IOERR_ELXSEC_KEY_UNWRAP_ERROR ||
                 lpfc_cmd->result ==
                     IOERR_ELXSEC_KEY_UNWRAP_COMPARE_ERROR ||
                 lpfc_cmd->result == IOERR_ELXSEC_CRYPTO_ERROR ||
                 lpfc_cmd->result ==
                     IOERR_ELXSEC_CRYPTO_COMPARE_ERROR) {
                 cmd->result = DID_NO_CONNECT << 16;
                 break;
             }
             if (lpfc_cmd->result == IOERR_INVALID_RPI ||
                 lpfc_cmd->result == IOERR_NO_RESOURCES ||
                 lpfc_cmd->result == IOERR_ABORT_REQUESTED ||
                 lpfc_cmd->result == IOERR_SLER_CMD_RCV_FAILURE) {
                 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
                 break;
             }
             if ((lpfc_cmd->result == IOERR_RX_DMA_FAILED ||
                  lpfc_cmd->result == IOERR_TX_DMA_FAILED) &&
                  pIocbOut->iocb.unsli3.sli3_bg.bgstat) {
                 if (scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL) {
                     /*
                      * This is a response for a BG enabled
                      * cmd. Parse BG error
                      */
                     lpfc_parse_bg_err(phba, lpfc_cmd,
                             pIocbOut);
                     break;
                 } else {
                     lpfc_printf_vlog(vport, KERN_WARNING,
                             LOG_BG,
                             "9031 non-zero BGSTAT "
                             "on unprotected cmd\n");
                 }
             }
             if ((lpfc_cmd->status == IOSTAT_REMOTE_STOP)
                 && (phba->sli_rev == LPFC_SLI_REV4)
                 && pnode) {
                 /* This IO was aborted by the target, we don't
                  * know the rxid and because we did not send the
                  * ABTS we cannot generate and RRQ.
                  */
                 lpfc_set_rrq_active(phba, pnode,
                     lpfc_cmd->cur_iocbq.sli4_lxritag,
                     0, 0);
             }
             fallthrough;
         default:
             cmd->result = DID_ERROR << 16;
             break;
         }
 
         if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
             cmd->result = DID_TRANSPORT_DISRUPTED << 16 |
                       SAM_STAT_BUSY;
     } else
         cmd->result = DID_OK << 16;
 
     if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
         uint32_t *lp = (uint32_t *)cmd->sense_buffer;
 
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                  "0710 Iodone <%d/%llu> cmd x%px, error "
                  "x%x SNS x%x x%x Data: x%x x%x\n",
                  cmd->device->id, cmd->device->lun, cmd,
                  cmd->result, *lp, *(lp + 3), cmd->retries,
                  scsi_get_resid(cmd));
     }
 
     lpfc_update_stats(vport, lpfc_cmd);
     if (vport->cfg_max_scsicmpl_time &&
        time_after(jiffies, lpfc_cmd->start_time +
         msecs_to_jiffies(vport->cfg_max_scsicmpl_time))) {
         spin_lock_irqsave(shost->host_lock, flags);
         if (pnode) {
             if (pnode->cmd_qdepth >
                 atomic_read(&pnode->cmd_pending) &&
                 (atomic_read(&pnode->cmd_pending) >
                 LPFC_MIN_TGT_QDEPTH) &&
                 ((cmd->cmnd[0] == READ_10) ||
                 (cmd->cmnd[0] == WRITE_10)))
                 pnode->cmd_qdepth =
                     atomic_read(&pnode->cmd_pending);
 
             pnode->last_change_time = jiffies;
         }
         spin_unlock_irqrestore(shost->host_lock, flags);
     }
     lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
 
     lpfc_cmd->pCmd = NULL;
     spin_unlock(&lpfc_cmd->buf_lock);
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (lpfc_cmd->ts_cmd_start) {
         lpfc_cmd->ts_isr_cmpl = pIocbIn->isr_timestamp;
         lpfc_cmd->ts_data_io = ktime_get_ns();
         phba->ktime_last_cmd = lpfc_cmd->ts_data_io;
         lpfc_io_ktime(phba, lpfc_cmd);
     }
 #endif
 
     /* The sdev is not guaranteed to be valid post scsi_done upcall. */
     scsi_done(cmd);
 
     /*
      * If there is an abort thread waiting for command completion
      * wake up the thread.
      */
     spin_lock(&lpfc_cmd->buf_lock);
     lpfc_cmd->cur_iocbq.cmd_flag &= ~LPFC_DRIVER_ABORTED;
     if (lpfc_cmd->waitq)
         wake_up(lpfc_cmd->waitq);
     spin_unlock(&lpfc_cmd->buf_lock);
 
     lpfc_release_scsi_buf(phba, lpfc_cmd);
 }
 
 /**
  * lpfc_scsi_prep_cmnd_buf_s3 - SLI-3 IOCB init for the IO
  * @vport: Pointer to vport object.
  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
  * @tmo: timeout value for the IO
  *
  * Based on the data-direction of the command, initialize IOCB
  * in the I/O buffer. Fill in the IOCB fields which are independent
  * of the scsi buffer
  *
  * RETURNS 0 - SUCCESS,
  **/
 static int lpfc_scsi_prep_cmnd_buf_s3(struct lpfc_vport *vport,
                       struct lpfc_io_buf *lpfc_cmd,
                       uint8_t tmo)
 {
     IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
     struct lpfc_iocbq *piocbq = &lpfc_cmd->cur_iocbq;
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
     int datadir = scsi_cmnd->sc_data_direction;
     u32 fcpdl;
 
     piocbq->iocb.un.fcpi.fcpi_XRdy = 0;
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.  Start the lpfc command prep by
      * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
      * data bde entry.
      */
     if (scsi_sg_count(scsi_cmnd)) {
         if (datadir == DMA_TO_DEVICE) {
             iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
             iocb_cmd->ulpPU = PARM_READ_CHECK;
             if (vport->cfg_first_burst_size &&
                 (pnode->nlp_flag & NLP_FIRSTBURST)) {
                 u32 xrdy_len;
 
                 fcpdl = scsi_bufflen(scsi_cmnd);
                 xrdy_len = min(fcpdl,
                            vport->cfg_first_burst_size);
                 piocbq->iocb.un.fcpi.fcpi_XRdy = xrdy_len;
             }
             fcp_cmnd->fcpCntl3 = WRITE_DATA;
         } else {
             iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
             iocb_cmd->ulpPU = PARM_READ_CHECK;
             fcp_cmnd->fcpCntl3 = READ_DATA;
         }
     } else {
         iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
         iocb_cmd->un.fcpi.fcpi_parm = 0;
         iocb_cmd->ulpPU = 0;
         fcp_cmnd->fcpCntl3 = 0;
     }
 
     /*
      * Finish initializing those IOCB fields that are independent
      * of the scsi_cmnd request_buffer
      */
     piocbq->iocb.ulpContext = pnode->nlp_rpi;
     if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
         piocbq->iocb.ulpFCP2Rcvy = 1;
     else
         piocbq->iocb.ulpFCP2Rcvy = 0;
 
     piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
     piocbq->io_buf  = lpfc_cmd;
     if (!piocbq->cmd_cmpl)
         piocbq->cmd_cmpl = lpfc_scsi_cmd_iocb_cmpl;
     piocbq->iocb.ulpTimeout = tmo;
     piocbq->vport = vport;
     return 0;
 }
 
 /**
  * lpfc_scsi_prep_cmnd_buf_s4 - SLI-4 WQE init for the IO
  * @vport: Pointer to vport object.
  * @lpfc_cmd: The scsi buffer which is going to be prep'ed.
  * @tmo: timeout value for the IO
  *
  * Based on the data-direction of the command copy WQE template
  * to I/O buffer WQE. Fill in the WQE fields which are independent
  * of the scsi buffer
  *
  * RETURNS 0 - SUCCESS,
  **/
 static int lpfc_scsi_prep_cmnd_buf_s4(struct lpfc_vport *vport,
                       struct lpfc_io_buf *lpfc_cmd,
                       uint8_t tmo)
 {
     struct lpfc_hba *phba = vport->phba;
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     struct lpfc_sli4_hdw_queue *hdwq = NULL;
     struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
     struct lpfc_nodelist *pnode = lpfc_cmd->ndlp;
     union lpfc_wqe128 *wqe = &pwqeq->wqe;
     u16 idx = lpfc_cmd->hdwq_no;
     int datadir = scsi_cmnd->sc_data_direction;
 
     hdwq = &phba->sli4_hba.hdwq[idx];
 
     /* Initialize 64 bytes only */
     memset(wqe, 0, sizeof(union lpfc_wqe128));
 
     /*
      * There are three possibilities here - use scatter-gather segment, use
      * the single mapping, or neither.
      */
     if (scsi_sg_count(scsi_cmnd)) {
         if (datadir == DMA_TO_DEVICE) {
             /* From the iwrite template, initialize words 7 -  11 */
             memcpy(&wqe->words[7],
                    &lpfc_iwrite_cmd_template.words[7],
                    sizeof(uint32_t) * 5);
 
             fcp_cmnd->fcpCntl3 = WRITE_DATA;
             if (hdwq)
                 hdwq->scsi_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 7 */
             bf_set(wqe_tmo, &wqe->fcp_iread.wqe_com, tmo);
 
             fcp_cmnd->fcpCntl3 = READ_DATA;
             if (hdwq)
                 hdwq->scsi_cstat.input_requests++;
 
             /* 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);
         }
     } else {
         /* From the icmnd template, initialize words 4 - 11 */
         memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
                sizeof(uint32_t) * 8);
 
         /* Word 7 */
         bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, tmo);
 
         fcp_cmnd->fcpCntl3 = 0;
         if (hdwq)
             hdwq->scsi_cstat.control_requests++;
     }
 
     /*
      * Finish initializing those WQE fields that are independent
      * of the request_buffer
      */
 
      /* Word 3 */
     bf_set(payload_offset_len, &wqe->fcp_icmd,
            sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
 
     /* 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 7*/
     if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
         bf_set(wqe_erp, &wqe->generic.wqe_com, 1);
 
     bf_set(wqe_class, &wqe->generic.wqe_com,
            (pnode->nlp_fcp_info & 0x0f));
 
      /* Word 8 */
     wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
 
     /* Word 9 */
     bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
 
     pwqeq->vport = vport;
     pwqeq->io_buf = lpfc_cmd;
     pwqeq->hba_wqidx = lpfc_cmd->hdwq_no;
     pwqeq->cmd_cmpl = lpfc_fcp_io_cmd_wqe_cmpl;
 
     return 0;
 }
 
 /**
  * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
  * @vport: The virtual port for which this call is being executed.
  * @lpfc_cmd: The scsi command which needs to send.
  * @pnode: Pointer to lpfc_nodelist.
  *
  * This routine initializes fcp_cmnd and iocb data structure from scsi command
  * to transfer for device with SLI3 interface spec.
  **/
 static int
 lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd,
             struct lpfc_nodelist *pnode)
 {
     struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
     struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
     u8 *ptr;
 
     if (!pnode)
         return 0;
 
     lpfc_cmd->fcp_rsp->rspSnsLen = 0;
     /* clear task management bits */
     lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
 
     int_to_scsilun(lpfc_cmd->pCmd->device->lun,
                &lpfc_cmd->fcp_cmnd->fcp_lun);
 
     ptr = &fcp_cmnd->fcpCdb[0];
     memcpy(ptr, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
     if (scsi_cmnd->cmd_len < LPFC_FCP_CDB_LEN) {
         ptr += scsi_cmnd->cmd_len;
         memset(ptr, 0, (LPFC_FCP_CDB_LEN - scsi_cmnd->cmd_len));
     }
 
     fcp_cmnd->fcpCntl1 = SIMPLE_Q;
 
     lpfc_scsi_prep_cmnd_buf(vport, lpfc_cmd, lpfc_cmd->timeout);
 
     return 0;
 }
 
 /**
  * lpfc_scsi_prep_task_mgmt_cmd_s3 - Convert SLI3 scsi TM cmd to FCP info unit
  * @vport: The virtual port for which this call is being executed.
  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
  * @lun: Logical unit number.
  * @task_mgmt_cmd: SCSI task management command.
  *
  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
  * for device with SLI-3 interface spec.
  *
  * Return codes:
  *   0 - Error
  *   1 - Success
  **/
 static int
 lpfc_scsi_prep_task_mgmt_cmd_s3(struct lpfc_vport *vport,
                 struct lpfc_io_buf *lpfc_cmd,
                 u64 lun, u8 task_mgmt_cmd)
 {
     struct lpfc_iocbq *piocbq;
     IOCB_t *piocb;
     struct fcp_cmnd *fcp_cmnd;
     struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
     struct lpfc_nodelist *ndlp = rdata->pnode;
 
     if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE)
         return 0;
 
     piocbq = &(lpfc_cmd->cur_iocbq);
     piocbq->vport = vport;
 
     piocb = &piocbq->iocb;
 
     fcp_cmnd = lpfc_cmd->fcp_cmnd;
     /* Clear out any old data in the FCP command area */
     memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
     int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
     fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
     if (!(vport->phba->sli3_options & LPFC_SLI3_BG_ENABLED))
         lpfc_fcpcmd_to_iocb(piocb->unsli3.fcp_ext.icd, fcp_cmnd);
     piocb->ulpCommand = CMD_FCP_ICMND64_CR;
     piocb->ulpContext = ndlp->nlp_rpi;
     piocb->ulpFCP2Rcvy = (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0;
     piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
     piocb->ulpPU = 0;
     piocb->un.fcpi.fcpi_parm = 0;
 
     /* ulpTimeout is only one byte */
     if (lpfc_cmd->timeout > 0xff) {
         /*
          * Do not timeout the command at the firmware level.
          * The driver will provide the timeout mechanism.
          */
         piocb->ulpTimeout = 0;
     } else
         piocb->ulpTimeout = lpfc_cmd->timeout;
 
     return 1;
 }
 
 /**
  * lpfc_scsi_prep_task_mgmt_cmd_s4 - Convert SLI4 scsi TM cmd to FCP info unit
  * @vport: The virtual port for which this call is being executed.
  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
  * @lun: Logical unit number.
  * @task_mgmt_cmd: SCSI task management command.
  *
  * This routine creates FCP information unit corresponding to @task_mgmt_cmd
  * for device with SLI-4 interface spec.
  *
  * Return codes:
  *   0 - Error
  *   1 - Success
  **/
 static int
 lpfc_scsi_prep_task_mgmt_cmd_s4(struct lpfc_vport *vport,
                 struct lpfc_io_buf *lpfc_cmd,
                 u64 lun, u8 task_mgmt_cmd)
 {
     struct lpfc_iocbq *pwqeq = &lpfc_cmd->cur_iocbq;
     union lpfc_wqe128 *wqe = &pwqeq->wqe;
     struct fcp_cmnd *fcp_cmnd;
     struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
     struct lpfc_nodelist *ndlp = rdata->pnode;
 
     if (!ndlp || ndlp->nlp_state != NLP_STE_MAPPED_NODE)
         return 0;
 
     pwqeq->vport = vport;
     /* Initialize 64 bytes only */
     memset(wqe, 0, sizeof(union lpfc_wqe128));
 
     /* From the icmnd template, initialize words 4 - 11 */
     memcpy(&wqe->words[4], &lpfc_icmnd_cmd_template.words[4],
            sizeof(uint32_t) * 8);
 
     fcp_cmnd = lpfc_cmd->fcp_cmnd;
     /* Clear out any old data in the FCP command area */
     memset(fcp_cmnd, 0, sizeof(struct fcp_cmnd));
     int_to_scsilun(lun, &fcp_cmnd->fcp_lun);
     fcp_cmnd->fcpCntl3 = 0;
     fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
 
     bf_set(payload_offset_len, &wqe->fcp_icmd,
            sizeof(struct fcp_cmnd) + sizeof(struct fcp_rsp));
     bf_set(cmd_buff_len, &wqe->fcp_icmd, 0);
     bf_set(wqe_ctxt_tag, &wqe->generic.wqe_com,  /* ulpContext */
            vport->phba->sli4_hba.rpi_ids[ndlp->nlp_rpi]);
     bf_set(wqe_erp, &wqe->fcp_icmd.wqe_com,
            ((ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) ? 1 : 0));
     bf_set(wqe_class, &wqe->fcp_icmd.wqe_com,
            (ndlp->nlp_fcp_info & 0x0f));
 
     /* ulpTimeout is only one byte */
     if (lpfc_cmd->timeout > 0xff) {
         /*
          * Do not timeout the command at the firmware level.
          * The driver will provide the timeout mechanism.
          */
         bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, 0);
     } else {
         bf_set(wqe_tmo, &wqe->fcp_icmd.wqe_com, lpfc_cmd->timeout);
     }
 
     lpfc_prep_embed_io(vport->phba, lpfc_cmd);
     bf_set(wqe_xri_tag, &wqe->generic.wqe_com, pwqeq->sli4_xritag);
     wqe->generic.wqe_com.abort_tag = pwqeq->iotag;
     bf_set(wqe_reqtag, &wqe->generic.wqe_com, pwqeq->iotag);
 
     lpfc_sli4_set_rsp_sgl_last(vport->phba, lpfc_cmd);
 
     return 1;
 }
 
 /**
  * lpfc_scsi_api_table_setup - Set up scsi api function jump table
  * @phba: The hba struct for which this call is being executed.
  * @dev_grp: The HBA PCI-Device group number.
  *
  * This routine sets up the SCSI interface API function jump table in @phba
  * struct.
  * Returns: 0 - success, -ENODEV - failure.
  **/
 int
 lpfc_scsi_api_table_setup(struct lpfc_hba *phba, uint8_t dev_grp)
 {
 
     phba->lpfc_scsi_unprep_dma_buf = lpfc_scsi_unprep_dma_buf;
 
     switch (dev_grp) {
     case LPFC_PCI_DEV_LP:
         phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s3;
         phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s3;
         phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s3;
         phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s3;
         phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s3;
         phba->lpfc_scsi_prep_task_mgmt_cmd =
                     lpfc_scsi_prep_task_mgmt_cmd_s3;
         break;
     case LPFC_PCI_DEV_OC:
         phba->lpfc_scsi_prep_dma_buf = lpfc_scsi_prep_dma_buf_s4;
         phba->lpfc_bg_scsi_prep_dma_buf = lpfc_bg_scsi_prep_dma_buf_s4;
         phba->lpfc_release_scsi_buf = lpfc_release_scsi_buf_s4;
         phba->lpfc_get_scsi_buf = lpfc_get_scsi_buf_s4;
         phba->lpfc_scsi_prep_cmnd_buf = lpfc_scsi_prep_cmnd_buf_s4;
         phba->lpfc_scsi_prep_task_mgmt_cmd =
                     lpfc_scsi_prep_task_mgmt_cmd_s4;
         break;
     default:
         lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                 "1418 Invalid HBA PCI-device group: 0x%x\n",
                 dev_grp);
         return -ENODEV;
     }
     phba->lpfc_rampdown_queue_depth = lpfc_rampdown_queue_depth;
     phba->lpfc_scsi_cmd_iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
     return 0;
 }
 
 /**
  * lpfc_tskmgmt_def_cmpl - IOCB completion routine for task management command
  * @phba: The Hba for which this call is being executed.
  * @cmdiocbq: Pointer to lpfc_iocbq data structure.
  * @rspiocbq: Pointer to lpfc_iocbq data structure.
  *
  * This routine is IOCB completion routine for device reset and target reset
  * routine. This routine release scsi buffer associated with lpfc_cmd.
  **/
 static void
 lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
             struct lpfc_iocbq *cmdiocbq,
             struct lpfc_iocbq *rspiocbq)
 {
     struct lpfc_io_buf *lpfc_cmd = cmdiocbq->io_buf;
     if (lpfc_cmd)
         lpfc_release_scsi_buf(phba, lpfc_cmd);
     return;
 }
 
 /**
  * lpfc_check_pci_resettable - Walks list of devices on pci_dev's bus to check
  *                             if issuing a pci_bus_reset is possibly unsafe
  * @phba: lpfc_hba pointer.
  *
  * Description:
  * Walks the bus_list to ensure only PCI devices with Emulex
  * vendor id, device ids that support hot reset, and only one occurrence
  * of function 0.
  *
  * Returns:
  * -EBADSLT,  detected invalid device
  *      0,    successful
  */
 int
 lpfc_check_pci_resettable(struct lpfc_hba *phba)
 {
     const struct pci_dev *pdev = phba->pcidev;
     struct pci_dev *ptr = NULL;
     u8 counter = 0;
 
     /* Walk the list of devices on the pci_dev's bus */
     list_for_each_entry(ptr, &pdev->bus->devices, bus_list) {
         /* Check for Emulex Vendor ID */
         if (ptr->vendor != PCI_VENDOR_ID_EMULEX) {
             lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                     "8346 Non-Emulex vendor found: "
                     "0x%04x\n", ptr->vendor);
             return -EBADSLT;
         }
 
         /* Check for valid Emulex Device ID */
         if (phba->sli_rev != LPFC_SLI_REV4 ||
             phba->hba_flag & HBA_FCOE_MODE) {
             lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                     "8347 Incapable PCI reset device: "
                     "0x%04x\n", ptr->device);
             return -EBADSLT;
         }
 
         /* Check for only one function 0 ID to ensure only one HBA on
          * secondary bus
          */
         if (ptr->devfn == 0) {
             if (++counter > 1) {
                 lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
                         "8348 More than one device on "
                         "secondary bus found\n");
                 return -EBADSLT;
             }
         }
     }
 
     return 0;
 }
 
 /**
  * lpfc_info - Info entry point of scsi_host_template data structure
  * @host: The scsi host for which this call is being executed.
  *
  * This routine provides module information about hba.
  *
  * Reutrn code:
  *   Pointer to char - Success.
  **/
 const char *
 lpfc_info(struct Scsi_Host *host)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
     struct lpfc_hba   *phba = vport->phba;
     int link_speed = 0;
     static char lpfcinfobuf[384];
     char tmp[384] = {0};
 
     memset(lpfcinfobuf, 0, sizeof(lpfcinfobuf));
     if (phba && phba->pcidev){
         /* Model Description */
         scnprintf(tmp, sizeof(tmp), phba->ModelDesc);
         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
             sizeof(lpfcinfobuf))
             goto buffer_done;
 
         /* PCI Info */
         scnprintf(tmp, sizeof(tmp),
               " on PCI bus %02x device %02x irq %d",
               phba->pcidev->bus->number, phba->pcidev->devfn,
               phba->pcidev->irq);
         if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
             sizeof(lpfcinfobuf))
             goto buffer_done;
 
         /* Port Number */
         if (phba->Port[0]) {
             scnprintf(tmp, sizeof(tmp), " port %s", phba->Port);
             if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
                 sizeof(lpfcinfobuf))
                 goto buffer_done;
         }
 
         /* Link Speed */
         link_speed = lpfc_sli_port_speed_get(phba);
         if (link_speed != 0) {
             scnprintf(tmp, sizeof(tmp),
                   " Logical Link Speed: %d Mbps", link_speed);
             if (strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf)) >=
                 sizeof(lpfcinfobuf))
                 goto buffer_done;
         }
 
         /* PCI resettable */
         if (!lpfc_check_pci_resettable(phba)) {
             scnprintf(tmp, sizeof(tmp), " PCI resettable");
             strlcat(lpfcinfobuf, tmp, sizeof(lpfcinfobuf));
         }
     }
 
 buffer_done:
     return lpfcinfobuf;
 }
 
 /**
  * lpfc_poll_rearm_timer - Routine to modify fcp_poll timer of hba
  * @phba: The Hba for which this call is being executed.
  *
  * This routine modifies fcp_poll_timer  field of @phba by cfg_poll_tmo.
  * The default value of cfg_poll_tmo is 10 milliseconds.
  **/
 static __inline__ void lpfc_poll_rearm_timer(struct lpfc_hba * phba)
 {
     unsigned long  poll_tmo_expires =
         (jiffies + msecs_to_jiffies(phba->cfg_poll_tmo));
 
     if (!list_empty(&phba->sli.sli3_ring[LPFC_FCP_RING].txcmplq))
         mod_timer(&phba->fcp_poll_timer,
               poll_tmo_expires);
 }
 
 /**
  * lpfc_poll_start_timer - Routine to start fcp_poll_timer of HBA
  * @phba: The Hba for which this call is being executed.
  *
  * This routine starts the fcp_poll_timer of @phba.
  **/
 void lpfc_poll_start_timer(struct lpfc_hba * phba)
 {
     lpfc_poll_rearm_timer(phba);
 }
 
 /**
  * lpfc_poll_timeout - Restart polling timer
  * @t: Timer construct where lpfc_hba data structure pointer is obtained.
  *
  * This routine restarts fcp_poll timer, when FCP ring  polling is enable
  * and FCP Ring interrupt is disable.
  **/
 void lpfc_poll_timeout(struct timer_list *t)
 {
     struct lpfc_hba *phba = from_timer(phba, t, fcp_poll_timer);
 
     if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
         lpfc_sli_handle_fast_ring_event(phba,
             &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
 
         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
             lpfc_poll_rearm_timer(phba);
     }
 }
 
 /*
  * lpfc_is_command_vm_io - get the UUID from blk cgroup
  * @cmd: Pointer to scsi_cmnd data structure
  * Returns UUID if present, otherwise NULL
  */
 static char *lpfc_is_command_vm_io(struct scsi_cmnd *cmd)
 {
     struct bio *bio = scsi_cmd_to_rq(cmd)->bio;
 
     if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !bio)
         return NULL;
     return blkcg_get_fc_appid(bio);
 }
 
 /**
  * lpfc_queuecommand - scsi_host_template queuecommand entry point
  * @shost: kernel scsi host pointer.
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * Driver registers this routine to scsi midlayer to submit a @cmd to process.
  * This routine prepares an IOCB from scsi command and provides to firmware.
  * The @done callback is invoked after driver finished processing the command.
  *
  * Return value :
  *   0 - Success
  *   SCSI_MLQUEUE_HOST_BUSY - Block all devices served by this host temporarily.
  **/
 static int
 lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
     struct lpfc_hba   *phba = vport->phba;
     struct lpfc_iocbq *cur_iocbq = NULL;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *ndlp;
     struct lpfc_io_buf *lpfc_cmd;
     struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
     int err, idx;
     u8 *uuid = NULL;
     uint64_t start;
 
     start = ktime_get_ns();
     rdata = lpfc_rport_data_from_scsi_device(cmnd->device);
 
     /* sanity check on references */
     if (unlikely(!rdata) || unlikely(!rport))
         goto out_fail_command;
 
     err = fc_remote_port_chkready(rport);
     if (err) {
         cmnd->result = err;
         goto out_fail_command;
     }
     ndlp = rdata->pnode;
 
     if ((scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) &&
         (!(phba->sli3_options & LPFC_SLI3_BG_ENABLED))) {
 
         lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
                 "9058 BLKGRD: ERROR: rcvd protected cmd:%02x"
                 " op:%02x str=%s without registering for"
                 " BlockGuard - Rejecting command\n",
                 cmnd->cmnd[0], scsi_get_prot_op(cmnd),
                 dif_op_str[scsi_get_prot_op(cmnd)]);
         goto out_fail_command;
     }
 
     /*
      * Catch race where our node has transitioned, but the
      * transport is still transitioning.
      */
     if (!ndlp)
         goto out_tgt_busy1;
 
     /* Check if IO qualifies for CMF */
     if (phba->cmf_active_mode != LPFC_CFG_OFF &&
         cmnd->sc_data_direction == DMA_FROM_DEVICE &&
         (scsi_sg_count(cmnd))) {
         /* Latency start time saved in rx_cmd_start later in routine */
         err = lpfc_update_cmf_cmd(phba, scsi_bufflen(cmnd));
         if (err)
             goto out_tgt_busy1;
     }
 
     if (lpfc_ndlp_check_qdepth(phba, ndlp)) {
         if (atomic_read(&ndlp->cmd_pending) >= ndlp->cmd_qdepth) {
             lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
                      "3377 Target Queue Full, scsi Id:%d "
                      "Qdepth:%d Pending command:%d"
                      " WWNN:%02x:%02x:%02x:%02x:"
                      "%02x:%02x:%02x:%02x, "
                      " WWPN:%02x:%02x:%02x:%02x:"
                      "%02x:%02x:%02x:%02x",
                      ndlp->nlp_sid, ndlp->cmd_qdepth,
                      atomic_read(&ndlp->cmd_pending),
                      ndlp->nlp_nodename.u.wwn[0],
                      ndlp->nlp_nodename.u.wwn[1],
                      ndlp->nlp_nodename.u.wwn[2],
                      ndlp->nlp_nodename.u.wwn[3],
                      ndlp->nlp_nodename.u.wwn[4],
                      ndlp->nlp_nodename.u.wwn[5],
                      ndlp->nlp_nodename.u.wwn[6],
                      ndlp->nlp_nodename.u.wwn[7],
                      ndlp->nlp_portname.u.wwn[0],
                      ndlp->nlp_portname.u.wwn[1],
                      ndlp->nlp_portname.u.wwn[2],
                      ndlp->nlp_portname.u.wwn[3],
                      ndlp->nlp_portname.u.wwn[4],
                      ndlp->nlp_portname.u.wwn[5],
                      ndlp->nlp_portname.u.wwn[6],
                      ndlp->nlp_portname.u.wwn[7]);
             goto out_tgt_busy2;
         }
     }
 
     lpfc_cmd = lpfc_get_scsi_buf(phba, ndlp, cmnd);
     if (lpfc_cmd == NULL) {
         lpfc_rampdown_queue_depth(phba);
 
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP_ERROR,
                  "0707 driver's buffer pool is empty, "
                  "IO busied\n");
         goto out_host_busy;
     }
     lpfc_cmd->rx_cmd_start = start;
 
     cur_iocbq = &lpfc_cmd->cur_iocbq;
     /*
      * Store the midlayer's command structure for the completion phase
      * and complete the command initialization.
      */
     lpfc_cmd->pCmd  = cmnd;
     lpfc_cmd->rdata = rdata;
     lpfc_cmd->ndlp = ndlp;
     cur_iocbq->cmd_cmpl = NULL;
     cmnd->host_scribble = (unsigned char *)lpfc_cmd;
 
     err = lpfc_scsi_prep_cmnd(vport, lpfc_cmd, ndlp);
     if (err)
         goto out_host_busy_release_buf;
 
     if (scsi_get_prot_op(cmnd) != SCSI_PROT_NORMAL) {
         if (vport->phba->cfg_enable_bg) {
             lpfc_printf_vlog(vport,
                      KERN_INFO, LOG_SCSI_CMD,
                      "9033 BLKGRD: rcvd %s cmd:x%x "
                      "reftag x%x cnt %u pt %x\n",
                      dif_op_str[scsi_get_prot_op(cmnd)],
                      cmnd->cmnd[0],
                      scsi_prot_ref_tag(cmnd),
                      scsi_logical_block_count(cmnd),
                      (cmnd->cmnd[1]>>5));
         }
         err = lpfc_bg_scsi_prep_dma_buf(phba, lpfc_cmd);
     } else {
         if (vport->phba->cfg_enable_bg) {
             lpfc_printf_vlog(vport,
                      KERN_INFO, LOG_SCSI_CMD,
                      "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
                      "x%x reftag x%x cnt %u pt %x\n",
                      cmnd->cmnd[0],
                      scsi_prot_ref_tag(cmnd),
                      scsi_logical_block_count(cmnd),
                      (cmnd->cmnd[1]>>5));
         }
         err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
     }
 
     if (unlikely(err)) {
         if (err == 2) {
             cmnd->result = DID_ERROR << 16;
             goto out_fail_command_release_buf;
         }
         goto out_host_busy_free_buf;
     }
 
     /* 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 = lpfc_is_command_vm_io(cmnd);
 
         if (uuid) {
             err = lpfc_vmid_get_appid(vport, uuid,
                     cmnd->sc_data_direction,
                     (union lpfc_vmid_io_tag *)
                         &cur_iocbq->vmid_tag);
             if (!err)
                 cur_iocbq->cmd_flag |= LPFC_IO_VMID;
         }
     }
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (unlikely(phba->hdwqstat_on & LPFC_CHECK_SCSI_IO))
         this_cpu_inc(phba->sli4_hba.c_stat->xmt_io);
 #endif
     /* Issue I/O to adapter */
     err = lpfc_sli_issue_fcp_io(phba, LPFC_FCP_RING, cur_iocbq,
                     SLI_IOCB_RET_IOCB);
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
     if (start) {
         lpfc_cmd->ts_cmd_start = start;
         lpfc_cmd->ts_last_cmd = phba->ktime_last_cmd;
         lpfc_cmd->ts_cmd_wqput = ktime_get_ns();
     } else {
         lpfc_cmd->ts_cmd_start = 0;
     }
 #endif
     if (err) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                  "3376 FCP could not issue iocb err %x "
                  "FCP cmd x%x <%d/%llu> "
                  "sid: x%x did: x%x oxid: x%x "
                  "Data: x%x x%x x%x x%x\n",
                  err, cmnd->cmnd[0],
                  cmnd->device ? cmnd->device->id : 0xffff,
                  cmnd->device ? cmnd->device->lun : (u64)-1,
                  vport->fc_myDID, ndlp->nlp_DID,
                  phba->sli_rev == LPFC_SLI_REV4 ?
                  cur_iocbq->sli4_xritag : 0xffff,
                  phba->sli_rev == LPFC_SLI_REV4 ?
                  phba->sli4_hba.rpi_ids[ndlp->nlp_rpi] :
                  cur_iocbq->iocb.ulpContext,
                  cur_iocbq->iotag,
                  phba->sli_rev == LPFC_SLI_REV4 ?
                  bf_get(wqe_tmo,
                     &cur_iocbq->wqe.generic.wqe_com) :
                  cur_iocbq->iocb.ulpTimeout,
                  (uint32_t)(scsi_cmd_to_rq(cmnd)->timeout / 1000));
 
         goto out_host_busy_free_buf;
     }
 
     if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
         lpfc_sli_handle_fast_ring_event(phba,
             &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
 
         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
             lpfc_poll_rearm_timer(phba);
     }
 
     if (phba->cfg_xri_rebalancing)
         lpfc_keep_pvt_pool_above_lowwm(phba, lpfc_cmd->hdwq_no);
 
     return 0;
 
  out_host_busy_free_buf:
     idx = lpfc_cmd->hdwq_no;
     lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
     if (phba->sli4_hba.hdwq) {
         switch (lpfc_cmd->fcp_cmnd->fcpCntl3) {
         case WRITE_DATA:
             phba->sli4_hba.hdwq[idx].scsi_cstat.output_requests--;
             break;
         case READ_DATA:
             phba->sli4_hba.hdwq[idx].scsi_cstat.input_requests--;
             break;
         default:
             phba->sli4_hba.hdwq[idx].scsi_cstat.control_requests--;
         }
     }
  out_host_busy_release_buf:
     lpfc_release_scsi_buf(phba, lpfc_cmd);
  out_host_busy:
     lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
                  shost);
     return SCSI_MLQUEUE_HOST_BUSY;
 
  out_tgt_busy2:
     lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
                  shost);
  out_tgt_busy1:
     return SCSI_MLQUEUE_TARGET_BUSY;
 
  out_fail_command_release_buf:
     lpfc_release_scsi_buf(phba, lpfc_cmd);
     lpfc_update_cmf_cmpl(phba, LPFC_CGN_NOT_SENT, scsi_bufflen(cmnd),
                  shost);
 
  out_fail_command:
     scsi_done(cmnd);
     return 0;
 }
 
 /*
  * lpfc_vmid_vport_cleanup - cleans up the resources associated with a vport
  * @vport: The virtual port for which this call is being executed.
  */
 void lpfc_vmid_vport_cleanup(struct lpfc_vport *vport)
 {
     u32 bucket;
     struct lpfc_vmid *cur;
 
     if (vport->port_type == LPFC_PHYSICAL_PORT)
         del_timer_sync(&vport->phba->inactive_vmid_poll);
 
     kfree(vport->qfpa_res);
     kfree(vport->vmid_priority.vmid_range);
     kfree(vport->vmid);
 
     if (!hash_empty(vport->hash_table))
         hash_for_each(vport->hash_table, bucket, cur, hnode)
             hash_del(&cur->hnode);
 
     vport->qfpa_res = NULL;
     vport->vmid_priority.vmid_range = NULL;
     vport->vmid = NULL;
     vport->cur_vmid_cnt = 0;
 }
 
 /**
  * lpfc_abort_handler - scsi_host_template eh_abort_handler entry point
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine aborts @cmnd pending in base driver.
  *
  * Return code :
  *   0x2003 - Error
  *   0x2002 - Success
  **/
 static int
 lpfc_abort_handler(struct scsi_cmnd *cmnd)
 {
     struct Scsi_Host  *shost = cmnd->device->host;
     struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
     struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
     struct lpfc_hba   *phba = vport->phba;
     struct lpfc_iocbq *iocb;
     struct lpfc_io_buf *lpfc_cmd;
     int ret = SUCCESS, status = 0;
     struct lpfc_sli_ring *pring_s4 = NULL;
     struct lpfc_sli_ring *pring = NULL;
     int ret_val;
     unsigned long flags;
     DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
 
     status = fc_block_rport(rport);
     if (status != 0 && status != SUCCESS)
         return status;
 
     lpfc_cmd = (struct lpfc_io_buf *)cmnd->host_scribble;
     if (!lpfc_cmd)
         return ret;
 
     /* Guard against IO completion being called at same time */
     spin_lock_irqsave(&lpfc_cmd->buf_lock, flags);
 
     spin_lock(&phba->hbalock);
     /* driver queued commands are in process of being flushed */
     if (phba->hba_flag & HBA_IOQ_FLUSH) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
             "3168 SCSI Layer abort requested I/O has been "
             "flushed by LLD.\n");
         ret = FAILED;
         goto out_unlock_hba;
     }
 
     if (!lpfc_cmd->pCmd) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
              "2873 SCSI Layer I/O Abort Request IO CMPL Status "
              "x%x ID %d LUN %llu\n",
              SUCCESS, cmnd->device->id, cmnd->device->lun);
         goto out_unlock_hba;
     }
 
     iocb = &lpfc_cmd->cur_iocbq;
     if (phba->sli_rev == LPFC_SLI_REV4) {
         pring_s4 = phba->sli4_hba.hdwq[iocb->hba_wqidx].io_wq->pring;
         if (!pring_s4) {
             ret = FAILED;
             goto out_unlock_hba;
         }
         spin_lock(&pring_s4->ring_lock);
     }
     /* the command is in process of being cancelled */
     if (!(iocb->cmd_flag & LPFC_IO_ON_TXCMPLQ)) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
             "3169 SCSI Layer abort requested I/O has been "
             "cancelled by LLD.\n");
         ret = FAILED;
         goto out_unlock_ring;
     }
     /*
      * If pCmd field of the corresponding lpfc_io_buf structure
      * points to a different SCSI command, then the driver has
      * already completed this command, but the midlayer did not
      * see the completion before the eh fired. Just return SUCCESS.
      */
     if (lpfc_cmd->pCmd != cmnd) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
             "3170 SCSI Layer abort requested I/O has been "
             "completed by LLD.\n");
         goto out_unlock_ring;
     }
 
     WARN_ON(iocb->io_buf != lpfc_cmd);
 
     /* abort issued in recovery is still in progress */
     if (iocb->cmd_flag & LPFC_DRIVER_ABORTED) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
              "3389 SCSI Layer I/O Abort Request is pending\n");
         if (phba->sli_rev == LPFC_SLI_REV4)
             spin_unlock(&pring_s4->ring_lock);
         spin_unlock(&phba->hbalock);
         spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
         goto wait_for_cmpl;
     }
 
     lpfc_cmd->waitq = &waitq;
     if (phba->sli_rev == LPFC_SLI_REV4) {
         spin_unlock(&pring_s4->ring_lock);
         ret_val = lpfc_sli4_issue_abort_iotag(phba, iocb,
                               lpfc_sli_abort_fcp_cmpl);
     } else {
         pring = &phba->sli.sli3_ring[LPFC_FCP_RING];
         ret_val = lpfc_sli_issue_abort_iotag(phba, pring, iocb,
                              lpfc_sli_abort_fcp_cmpl);
     }
 
     /* Make sure HBA is alive */
     lpfc_issue_hb_tmo(phba);
 
     if (ret_val != IOCB_SUCCESS) {
         /* Indicate the IO is not being aborted by the driver. */
         lpfc_cmd->waitq = NULL;
         ret = FAILED;
         goto out_unlock_hba;
     }
 
     /* no longer need the lock after this point */
     spin_unlock(&phba->hbalock);
     spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
 
     if (phba->cfg_poll & DISABLE_FCP_RING_INT)
         lpfc_sli_handle_fast_ring_event(phba,
             &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
 
 wait_for_cmpl:
     /*
      * cmd_flag is set to LPFC_DRIVER_ABORTED before we wait
      * for abort to complete.
      */
     wait_event_timeout(waitq,
               (lpfc_cmd->pCmd != cmnd),
                msecs_to_jiffies(2*vport->cfg_devloss_tmo*1000));
 
     spin_lock(&lpfc_cmd->buf_lock);
 
     if (lpfc_cmd->pCmd == cmnd) {
         ret = FAILED;
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "0748 abort handler timed out waiting "
                  "for aborting I/O (xri:x%x) to complete: "
                  "ret %#x, ID %d, LUN %llu\n",
                  iocb->sli4_xritag, ret,
                  cmnd->device->id, cmnd->device->lun);
     }
 
     lpfc_cmd->waitq = NULL;
 
     spin_unlock(&lpfc_cmd->buf_lock);
     goto out;
 
 out_unlock_ring:
     if (phba->sli_rev == LPFC_SLI_REV4)
         spin_unlock(&pring_s4->ring_lock);
 out_unlock_hba:
     spin_unlock(&phba->hbalock);
     spin_unlock_irqrestore(&lpfc_cmd->buf_lock, flags);
 out:
     lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
              "0749 SCSI Layer I/O Abort Request Status x%x ID %d "
              "LUN %llu\n", ret, cmnd->device->id,
              cmnd->device->lun);
     return ret;
 }
 
 static char *
 lpfc_taskmgmt_name(uint8_t task_mgmt_cmd)
 {
     switch (task_mgmt_cmd) {
     case FCP_ABORT_TASK_SET:
         return "ABORT_TASK_SET";
     case FCP_CLEAR_TASK_SET:
         return "FCP_CLEAR_TASK_SET";
     case FCP_BUS_RESET:
         return "FCP_BUS_RESET";
     case FCP_LUN_RESET:
         return "FCP_LUN_RESET";
     case FCP_TARGET_RESET:
         return "FCP_TARGET_RESET";
     case FCP_CLEAR_ACA:
         return "FCP_CLEAR_ACA";
     case FCP_TERMINATE_TASK:
         return "FCP_TERMINATE_TASK";
     default:
         return "unknown";
     }
 }
 
 
 /**
  * lpfc_check_fcp_rsp - check the returned fcp_rsp to see if task failed
  * @vport: The virtual port for which this call is being executed.
  * @lpfc_cmd: Pointer to lpfc_io_buf data structure.
  *
  * This routine checks the FCP RSP INFO to see if the tsk mgmt command succeded
  *
  * Return code :
  *   0x2003 - Error
  *   0x2002 - Success
  **/
 static int
 lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd)
 {
     struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
     uint32_t rsp_info;
     uint32_t rsp_len;
     uint8_t  rsp_info_code;
     int ret = FAILED;
 
 
     if (fcprsp == NULL)
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                  "0703 fcp_rsp is missing\n");
     else {
         rsp_info = fcprsp->rspStatus2;
         rsp_len = be32_to_cpu(fcprsp->rspRspLen);
         rsp_info_code = fcprsp->rspInfo3;
 
 
         lpfc_printf_vlog(vport, KERN_INFO,
                  LOG_FCP,
                  "0706 fcp_rsp valid 0x%x,"
                  " rsp len=%d code 0x%x\n",
                  rsp_info,
                  rsp_len, rsp_info_code);
 
         /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN
          * field specifies the number of valid bytes of FCP_RSP_INFO.
          * The FCP_RSP_LEN field shall be set to 0x04 or 0x08
          */
         if ((fcprsp->rspStatus2 & RSP_LEN_VALID) &&
             ((rsp_len == 8) || (rsp_len == 4))) {
             switch (rsp_info_code) {
             case RSP_NO_FAILURE:
                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                          "0715 Task Mgmt No Failure\n");
                 ret = SUCCESS;
                 break;
             case RSP_TM_NOT_SUPPORTED: /* TM rejected */
                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                          "0716 Task Mgmt Target "
                         "reject\n");
                 break;
             case RSP_TM_NOT_COMPLETED: /* TM failed */
                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                          "0717 Task Mgmt Target "
                         "failed TM\n");
                 break;
             case RSP_TM_INVALID_LU: /* TM to invalid LU! */
                 lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
                          "0718 Task Mgmt to invalid "
                         "LUN\n");
                 break;
             }
         }
     }
     return ret;
 }
 
 
 /**
  * lpfc_send_taskmgmt - Generic SCSI Task Mgmt Handler
  * @vport: The virtual port for which this call is being executed.
  * @rport: Pointer to remote port
  * @tgt_id: Target ID of remote device.
  * @lun_id: Lun number for the TMF
  * @task_mgmt_cmd: type of TMF to send
  *
  * This routine builds and sends a TMF (SCSI Task Mgmt Function) to
  * a remote port.
  *
  * Return Code:
  *   0x2003 - Error
  *   0x2002 - Success.
  **/
 static int
 lpfc_send_taskmgmt(struct lpfc_vport *vport, struct fc_rport *rport,
            unsigned int tgt_id, uint64_t lun_id,
            uint8_t task_mgmt_cmd)
 {
     struct lpfc_hba   *phba = vport->phba;
     struct lpfc_io_buf *lpfc_cmd;
     struct lpfc_iocbq *iocbq;
     struct lpfc_iocbq *iocbqrsp;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *pnode;
     int ret;
     int status;
 
     rdata = rport->dd_data;
     if (!rdata || !rdata->pnode)
         return FAILED;
     pnode = rdata->pnode;
 
     lpfc_cmd = lpfc_get_scsi_buf(phba, rdata->pnode, NULL);
     if (lpfc_cmd == NULL)
         return FAILED;
     lpfc_cmd->timeout = phba->cfg_task_mgmt_tmo;
     lpfc_cmd->rdata = rdata;
     lpfc_cmd->pCmd = NULL;
     lpfc_cmd->ndlp = pnode;
 
     status = phba->lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun_id,
                             task_mgmt_cmd);
     if (!status) {
         lpfc_release_scsi_buf(phba, lpfc_cmd);
         return FAILED;
     }
 
     iocbq = &lpfc_cmd->cur_iocbq;
     iocbqrsp = lpfc_sli_get_iocbq(phba);
     if (iocbqrsp == NULL) {
         lpfc_release_scsi_buf(phba, lpfc_cmd);
         return FAILED;
     }
     iocbq->cmd_cmpl = lpfc_tskmgmt_def_cmpl;
     iocbq->vport = vport;
 
     lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
              "0702 Issue %s to TGT %d LUN %llu "
              "rpi x%x nlp_flag x%x Data: x%x x%x\n",
              lpfc_taskmgmt_name(task_mgmt_cmd), tgt_id, lun_id,
              pnode->nlp_rpi, pnode->nlp_flag, iocbq->sli4_xritag,
              iocbq->cmd_flag);
 
     status = lpfc_sli_issue_iocb_wait(phba, LPFC_FCP_RING,
                       iocbq, iocbqrsp, lpfc_cmd->timeout);
     if ((status != IOCB_SUCCESS) ||
         (get_job_ulpstatus(phba, iocbqrsp) != IOSTAT_SUCCESS)) {
         if (status != IOCB_SUCCESS ||
             get_job_ulpstatus(phba, iocbqrsp) != IOSTAT_FCP_RSP_ERROR)
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "0727 TMF %s to TGT %d LUN %llu "
                      "failed (%d, %d) cmd_flag x%x\n",
                      lpfc_taskmgmt_name(task_mgmt_cmd),
                      tgt_id, lun_id,
                      get_job_ulpstatus(phba, iocbqrsp),
                      get_job_word4(phba, iocbqrsp),
                      iocbq->cmd_flag);
         /* if ulpStatus != IOCB_SUCCESS, then status == IOCB_SUCCESS */
         if (status == IOCB_SUCCESS) {
             if (get_job_ulpstatus(phba, iocbqrsp) ==
                 IOSTAT_FCP_RSP_ERROR)
                 /* Something in the FCP_RSP was invalid.
                  * Check conditions */
                 ret = lpfc_check_fcp_rsp(vport, lpfc_cmd);
             else
                 ret = FAILED;
         } else if ((status == IOCB_TIMEDOUT) ||
                (status == IOCB_ABORTED)) {
             ret = TIMEOUT_ERROR;
         } else {
             ret = FAILED;
         }
     } else
         ret = SUCCESS;
 
     lpfc_sli_release_iocbq(phba, iocbqrsp);
 
     if (status != IOCB_TIMEDOUT)
         lpfc_release_scsi_buf(phba, lpfc_cmd);
 
     return ret;
 }
 
 /**
  * lpfc_chk_tgt_mapped -
  * @vport: The virtual port to check on
  * @rport: Pointer to fc_rport data structure.
  *
  * This routine delays until the scsi target (aka rport) for the
  * command exists (is present and logged in) or we declare it non-existent.
  *
  * Return code :
  *  0x2003 - Error
  *  0x2002 - Success
  **/
 static int
 lpfc_chk_tgt_mapped(struct lpfc_vport *vport, struct fc_rport *rport)
 {
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *pnode = NULL;
     unsigned long later;
 
     rdata = rport->dd_data;
     if (!rdata) {
         lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
             "0797 Tgt Map rport failure: rdata x%px\n", rdata);
         return FAILED;
     }
     pnode = rdata->pnode;
 
     /*
      * If target is not in a MAPPED state, delay until
      * target is rediscovered or devloss timeout expires.
      */
     later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
     while (time_after(later, jiffies)) {
         if (!pnode)
             return FAILED;
         if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
             return SUCCESS;
         schedule_timeout_uninterruptible(msecs_to_jiffies(500));
         rdata = rport->dd_data;
         if (!rdata)
             return FAILED;
         pnode = rdata->pnode;
     }
     if (!pnode || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
         return FAILED;
     return SUCCESS;
 }
 
 /**
  * lpfc_reset_flush_io_context -
  * @vport: The virtual port (scsi_host) for the flush context
  * @tgt_id: If aborting by Target contect - specifies the target id
  * @lun_id: If aborting by Lun context - specifies the lun id
  * @context: specifies the context level to flush at.
  *
  * After a reset condition via TMF, we need to flush orphaned i/o
  * contexts from the adapter. This routine aborts any contexts
  * outstanding, then waits for their completions. The wait is
  * bounded by devloss_tmo though.
  *
  * Return code :
  *  0x2003 - Error
  *  0x2002 - Success
  **/
 static int
 lpfc_reset_flush_io_context(struct lpfc_vport *vport, uint16_t tgt_id,
             uint64_t lun_id, lpfc_ctx_cmd context)
 {
     struct lpfc_hba   *phba = vport->phba;
     unsigned long later;
     int cnt;
 
     cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
     if (cnt)
         lpfc_sli_abort_taskmgmt(vport,
                     &phba->sli.sli3_ring[LPFC_FCP_RING],
                     tgt_id, lun_id, context);
     later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies;
     while (time_after(later, jiffies) && cnt) {
         schedule_timeout_uninterruptible(msecs_to_jiffies(20));
         cnt = lpfc_sli_sum_iocb(vport, tgt_id, lun_id, context);
     }
     if (cnt) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
             "0724 I/O flush failure for context %s : cnt x%x\n",
             ((context == LPFC_CTX_LUN) ? "LUN" :
              ((context == LPFC_CTX_TGT) ? "TGT" :
               ((context == LPFC_CTX_HOST) ? "HOST" : "Unknown"))),
             cnt);
         return FAILED;
     }
     return SUCCESS;
 }
 
 /**
  * lpfc_device_reset_handler - scsi_host_template eh_device_reset entry point
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine does a device reset by sending a LUN_RESET task management
  * command.
  *
  * Return code :
  *  0x2003 - Error
  *  0x2002 - Success
  **/
 static int
 lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
 {
     struct Scsi_Host  *shost = cmnd->device->host;
     struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
     struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *pnode;
     unsigned tgt_id = cmnd->device->id;
     uint64_t lun_id = cmnd->device->lun;
     struct lpfc_scsi_event_header scsi_event;
     int status;
     u32 logit = LOG_FCP;
 
     if (!rport)
         return FAILED;
 
     rdata = rport->dd_data;
     if (!rdata || !rdata->pnode) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "0798 Device Reset rdata failure: rdata x%px\n",
                  rdata);
         return FAILED;
     }
     pnode = rdata->pnode;
     status = fc_block_rport(rport);
     if (status != 0 && status != SUCCESS)
         return status;
 
     status = lpfc_chk_tgt_mapped(vport, rport);
     if (status == FAILED) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
             "0721 Device Reset rport failure: rdata x%px\n", rdata);
         return FAILED;
     }
 
     scsi_event.event_type = FC_REG_SCSI_EVENT;
     scsi_event.subcategory = LPFC_EVENT_LUNRESET;
     scsi_event.lun = lun_id;
     memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
     memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
 
     fc_host_post_vendor_event(shost, fc_get_event_number(),
         sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
 
     status = lpfc_send_taskmgmt(vport, rport, tgt_id, lun_id,
                         FCP_LUN_RESET);
     if (status != SUCCESS)
         logit =  LOG_TRACE_EVENT;
 
     lpfc_printf_vlog(vport, KERN_ERR, logit,
              "0713 SCSI layer issued Device Reset (%d, %llu) "
              "return x%x\n", tgt_id, lun_id, status);
 
     /*
      * We have to clean up i/o as : they may be orphaned by the TMF;
      * or if the TMF failed, they may be in an indeterminate state.
      * So, continue on.
      * We will report success if all the i/o aborts successfully.
      */
     if (status == SUCCESS)
         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
                         LPFC_CTX_LUN);
 
     return status;
 }
 
 /**
  * lpfc_target_reset_handler - scsi_host_template eh_target_reset entry point
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine does a target reset by sending a TARGET_RESET task management
  * command.
  *
  * Return code :
  *  0x2003 - Error
  *  0x2002 - Success
  **/
 static int
 lpfc_target_reset_handler(struct scsi_cmnd *cmnd)
 {
     struct Scsi_Host  *shost = cmnd->device->host;
     struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
     struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
     struct lpfc_rport_data *rdata;
     struct lpfc_nodelist *pnode;
     unsigned tgt_id = cmnd->device->id;
     uint64_t lun_id = cmnd->device->lun;
     struct lpfc_scsi_event_header scsi_event;
     int status;
     u32 logit = LOG_FCP;
     u32 dev_loss_tmo = vport->cfg_devloss_tmo;
     unsigned long flags;
     DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
 
     if (!rport)
         return FAILED;
 
     rdata = rport->dd_data;
     if (!rdata || !rdata->pnode) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                  "0799 Target Reset rdata failure: rdata x%px\n",
                  rdata);
         return FAILED;
     }
     pnode = rdata->pnode;
     status = fc_block_rport(rport);
     if (status != 0 && status != SUCCESS)
         return status;
 
     status = lpfc_chk_tgt_mapped(vport, rport);
     if (status == FAILED) {
         lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
             "0722 Target Reset rport failure: rdata x%px\n", rdata);
         if (pnode) {
             spin_lock_irqsave(&pnode->lock, flags);
             pnode->nlp_flag &= ~NLP_NPR_ADISC;
             pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
             spin_unlock_irqrestore(&pnode->lock, flags);
         }
         lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
                       LPFC_CTX_TGT);
         return FAST_IO_FAIL;
     }
 
     scsi_event.event_type = FC_REG_SCSI_EVENT;
     scsi_event.subcategory = LPFC_EVENT_TGTRESET;
     scsi_event.lun = 0;
     memcpy(scsi_event.wwpn, &pnode->nlp_portname, sizeof(struct lpfc_name));
     memcpy(scsi_event.wwnn, &pnode->nlp_nodename, sizeof(struct lpfc_name));
 
     fc_host_post_vendor_event(shost, fc_get_event_number(),
         sizeof(scsi_event), (char *)&scsi_event, LPFC_NL_VENDOR_ID);
 
     status = lpfc_send_taskmgmt(vport, rport, tgt_id, lun_id,
                     FCP_TARGET_RESET);
     if (status != SUCCESS) {
         logit = LOG_TRACE_EVENT;
 
         /* Issue LOGO, if no LOGO is outstanding */
         spin_lock_irqsave(&pnode->lock, flags);
         if (!(pnode->save_flags & NLP_WAIT_FOR_LOGO) &&
             !pnode->logo_waitq) {
             pnode->logo_waitq = &waitq;
             pnode->nlp_fcp_info &= ~NLP_FCP_2_DEVICE;
             pnode->nlp_flag |= NLP_ISSUE_LOGO;
             pnode->save_flags |= NLP_WAIT_FOR_LOGO;
             spin_unlock_irqrestore(&pnode->lock, flags);
             lpfc_unreg_rpi(vport, pnode);
             wait_event_timeout(waitq,
                        (!(pnode->save_flags &
                           NLP_WAIT_FOR_LOGO)),
                        msecs_to_jiffies(dev_loss_tmo *
                                 1000));
 
             if (pnode->save_flags & NLP_WAIT_FOR_LOGO) {
                 lpfc_printf_vlog(vport, KERN_ERR, logit,
                          "0725 SCSI layer TGTRST "
                          "failed & LOGO TMO (%d, %llu) "
                          "return x%x\n",
                          tgt_id, lun_id, status);
                 spin_lock_irqsave(&pnode->lock, flags);
                 pnode->save_flags &= ~NLP_WAIT_FOR_LOGO;
             } else {
                 spin_lock_irqsave(&pnode->lock, flags);
             }
             pnode->logo_waitq = NULL;
             spin_unlock_irqrestore(&pnode->lock, flags);
             status = SUCCESS;
 
         } else {
             spin_unlock_irqrestore(&pnode->lock, flags);
             status = FAILED;
         }
     }
 
     lpfc_printf_vlog(vport, KERN_ERR, logit,
              "0723 SCSI layer issued Target Reset (%d, %llu) "
              "return x%x\n", tgt_id, lun_id, status);
 
     /*
      * We have to clean up i/o as : they may be orphaned by the TMF;
      * or if the TMF failed, they may be in an indeterminate state.
      * So, continue on.
      * We will report success if all the i/o aborts successfully.
      */
     if (status == SUCCESS)
         status = lpfc_reset_flush_io_context(vport, tgt_id, lun_id,
                       LPFC_CTX_TGT);
     return status;
 }
 
 /**
  * lpfc_host_reset_handler - scsi_host_template eh_host_reset_handler entry pt
  * @cmnd: Pointer to scsi_cmnd data structure.
  *
  * This routine does host reset to the adaptor port. It brings the HBA
  * offline, performs a board restart, and then brings the board back online.
  * The lpfc_offline calls lpfc_sli_hba_down which will abort and local
  * reject all outstanding SCSI commands to the host and error returned
  * back to SCSI mid-level. As this will be SCSI mid-level's last resort
  * of error handling, it will only return error if resetting of the adapter
  * is not successful; in all other cases, will return success.
  *
  * Return code :
  *  0x2003 - Error
  *  0x2002 - Success
  **/
 static int
 lpfc_host_reset_handler(struct scsi_cmnd *cmnd)
 {
     struct Scsi_Host *shost = cmnd->device->host;
     struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
     struct lpfc_hba *phba = vport->phba;
     int rc, ret = SUCCESS;
 
     lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
              "3172 SCSI layer issued Host Reset Data:\n");
 
     lpfc_offline_prep(phba, LPFC_MBX_WAIT);
     lpfc_offline(phba);
     rc = lpfc_sli_brdrestart(phba);
     if (rc)
         goto error;
 
     /* Wait for successful restart of adapter */
     if (phba->sli_rev < LPFC_SLI_REV4) {
         rc = lpfc_sli_chipset_init(phba);
         if (rc)
             goto error;
     }
 
     rc = lpfc_online(phba);
     if (rc)
         goto error;
 
     lpfc_unblock_mgmt_io(phba);
 
     return ret;
 error:
     lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
              "3323 Failed host reset\n");
     lpfc_unblock_mgmt_io(phba);
     return FAILED;
 }
 
 /**
  * lpfc_slave_alloc - scsi_host_template slave_alloc entry point
  * @sdev: Pointer to scsi_device.
  *
  * This routine populates the cmds_per_lun count + 2 scsi_bufs into  this host's
  * globally available list of scsi buffers. This routine also makes sure scsi
  * buffer is not allocated more than HBA limit conveyed to midlayer. This list
  * of scsi buffer exists for the lifetime of the driver.
  *
  * Return codes:
  *   non-0 - Error
  *   0 - Success
  **/
 static int
 lpfc_slave_alloc(struct scsi_device *sdev)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
     struct lpfc_hba   *phba = vport->phba;
     struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
     uint32_t total = 0;
     uint32_t num_to_alloc = 0;
     int num_allocated = 0;
     uint32_t sdev_cnt;
     struct lpfc_device_data *device_data;
     unsigned long flags;
     struct lpfc_name target_wwpn;
 
     if (!rport || fc_remote_port_chkready(rport))
         return -ENXIO;
 
     if (phba->cfg_fof) {
 
         /*
          * Check to see if the device data structure for the lun
          * exists.  If not, create one.
          */
 
         u64_to_wwn(rport->port_name, target_wwpn.u.wwn);
         spin_lock_irqsave(&phba->devicelock, flags);
         device_data = __lpfc_get_device_data(phba,
                              &phba->luns,
                              &vport->fc_portname,
                              &target_wwpn,
                              sdev->lun);
         if (!device_data) {
             spin_unlock_irqrestore(&phba->devicelock, flags);
             device_data = lpfc_create_device_data(phba,
                             &vport->fc_portname,
                             &target_wwpn,
                             sdev->lun,
                             phba->cfg_XLanePriority,
                             true);
             if (!device_data)
                 return -ENOMEM;
             spin_lock_irqsave(&phba->devicelock, flags);
             list_add_tail(&device_data->listentry, &phba->luns);
         }
         device_data->rport_data = rport->dd_data;
         device_data->available = true;
         spin_unlock_irqrestore(&phba->devicelock, flags);
         sdev->hostdata = device_data;
     } else {
         sdev->hostdata = rport->dd_data;
     }
     sdev_cnt = atomic_inc_return(&phba->sdev_cnt);
 
     /* For SLI4, all IO buffers are pre-allocated */
     if (phba->sli_rev == LPFC_SLI_REV4)
         return 0;
 
     /* This code path is now ONLY for SLI3 adapters */
 
     /*
      * Populate the cmds_per_lun count scsi_bufs into this host's globally
      * available list of scsi buffers.  Don't allocate more than the
      * HBA limit conveyed to the midlayer via the host structure.  The
      * formula accounts for the lun_queue_depth + error handlers + 1
      * extra.  This list of scsi bufs exists for the lifetime of the driver.
      */
     total = phba->total_scsi_bufs;
     num_to_alloc = vport->cfg_lun_queue_depth + 2;
 
     /* If allocated buffers are enough do nothing */
     if ((sdev_cnt * (vport->cfg_lun_queue_depth + 2)) < total)
         return 0;
 
     /* Allow some exchanges to be available always to complete discovery */
     if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
                  "0704 At limitation of %d preallocated "
                  "command buffers\n", total);
         return 0;
     /* Allow some exchanges to be available always to complete discovery */
     } else if (total + num_to_alloc >
         phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
         lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
                  "0705 Allocation request of %d "
                  "command buffers will exceed max of %d.  "
                  "Reducing allocation request to %d.\n",
                  num_to_alloc, phba->cfg_hba_queue_depth,
                  (phba->cfg_hba_queue_depth - total));
         num_to_alloc = phba->cfg_hba_queue_depth - total;
     }
     num_allocated = lpfc_new_scsi_buf_s3(vport, num_to_alloc);
     if (num_to_alloc != num_allocated) {
             lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
                      "0708 Allocation request of %d "
                      "command buffers did not succeed.  "
                      "Allocated %d buffers.\n",
                      num_to_alloc, num_allocated);
     }
     if (num_allocated > 0)
         phba->total_scsi_bufs += num_allocated;
     return 0;
 }
 
 /**
  * lpfc_slave_configure - scsi_host_template slave_configure entry point
  * @sdev: Pointer to scsi_device.
  *
  * This routine configures following items
  *   - Tag command queuing support for @sdev if supported.
  *   - Enable SLI polling for fcp ring if ENABLE_FCP_RING_POLLING flag is set.
  *
  * Return codes:
  *   0 - Success
  **/
 static int
 lpfc_slave_configure(struct scsi_device *sdev)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
     struct lpfc_hba   *phba = vport->phba;
 
     scsi_change_queue_depth(sdev, vport->cfg_lun_queue_depth);
 
     if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
         lpfc_sli_handle_fast_ring_event(phba,
             &phba->sli.sli3_ring[LPFC_FCP_RING], HA_R0RE_REQ);
         if (phba->cfg_poll & DISABLE_FCP_RING_INT)
             lpfc_poll_rearm_timer(phba);
     }
 
     return 0;
 }
 
 /**
  * lpfc_slave_destroy - slave_destroy entry point of SHT data structure
  * @sdev: Pointer to scsi_device.
  *
  * This routine sets @sdev hostatdata filed to null.
  **/
 static void
 lpfc_slave_destroy(struct scsi_device *sdev)
 {
     struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
     struct lpfc_hba   *phba = vport->phba;
     unsigned long flags;
     struct lpfc_device_data *device_data = sdev->hostdata;
 
     atomic_dec(&phba->sdev_cnt);
     if ((phba->cfg_fof) && (device_data)) {
         spin_lock_irqsave(&phba->devicelock, flags);
         device_data->available = false;
         if (!device_data->oas_enabled)
             lpfc_delete_device_data(phba, device_data);
         spin_unlock_irqrestore(&phba->devicelock, flags);
     }
     sdev->hostdata = NULL;
     return;
 }
 
 /**
  * lpfc_create_device_data - creates and initializes device data structure for OAS
  * @phba: Pointer to host bus adapter structure.
  * @vport_wwpn: Pointer to vport's wwpn information
  * @target_wwpn: Pointer to target's wwpn information
  * @lun: Lun on target
  * @pri: Priority
  * @atomic_create: Flag to indicate if memory should be allocated using the
  *        GFP_ATOMIC flag or not.
  *
  * This routine creates a device data structure which will contain identifying
  * information for the device (host wwpn, target wwpn, lun), state of OAS,
  * whether or not the corresponding lun is available by the system,
  * and pointer to the rport data.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_device_data - Success
  **/
 struct lpfc_device_data*
 lpfc_create_device_data(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
             struct lpfc_name *target_wwpn, uint64_t lun,
             uint32_t pri, bool atomic_create)
 {
 
     struct lpfc_device_data *lun_info;
     int memory_flags;
 
     if (unlikely(!phba) || !vport_wwpn || !target_wwpn  ||
         !(phba->cfg_fof))
         return NULL;
 
     /* Attempt to create the device data to contain lun info */
 
     if (atomic_create)
         memory_flags = GFP_ATOMIC;
     else
         memory_flags = GFP_KERNEL;
     lun_info = mempool_alloc(phba->device_data_mem_pool, memory_flags);
     if (!lun_info)
         return NULL;
     INIT_LIST_HEAD(&lun_info->listentry);
     lun_info->rport_data  = NULL;
     memcpy(&lun_info->device_id.vport_wwpn, vport_wwpn,
            sizeof(struct lpfc_name));
     memcpy(&lun_info->device_id.target_wwpn, target_wwpn,
            sizeof(struct lpfc_name));
     lun_info->device_id.lun = lun;
     lun_info->oas_enabled = false;
     lun_info->priority = pri;
     lun_info->available = false;
     return lun_info;
 }
 
 /**
  * lpfc_delete_device_data - frees a device data structure for OAS
  * @phba: Pointer to host bus adapter structure.
  * @lun_info: Pointer to device data structure to free.
  *
  * This routine frees the previously allocated device data structure passed.
  *
  **/
 void
 lpfc_delete_device_data(struct lpfc_hba *phba,
             struct lpfc_device_data *lun_info)
 {
 
     if (unlikely(!phba) || !lun_info  ||
         !(phba->cfg_fof))
         return;
 
     if (!list_empty(&lun_info->listentry))
         list_del(&lun_info->listentry);
     mempool_free(lun_info, phba->device_data_mem_pool);
     return;
 }
 
 /**
  * __lpfc_get_device_data - returns the device data for the specified lun
  * @phba: Pointer to host bus adapter structure.
  * @list: Point to list to search.
  * @vport_wwpn: Pointer to vport's wwpn information
  * @target_wwpn: Pointer to target's wwpn information
  * @lun: Lun on target
  *
  * This routine searches the list passed for the specified lun's device data.
  * This function does not hold locks, it is the responsibility of the caller
  * to ensure the proper lock is held before calling the function.
  *
  * Return codes:
  *   NULL - Error
  *   Pointer to lpfc_device_data - Success
  **/
 struct lpfc_device_data*
 __lpfc_get_device_data(struct lpfc_hba *phba, struct list_head *list,
                struct lpfc_name *vport_wwpn,
                struct lpfc_name *target_wwpn, uint64_t lun)
 {
 
     struct lpfc_device_data *lun_info;
 
     if (unlikely(!phba) || !list || !vport_wwpn || !target_wwpn ||
         !phba->cfg_fof)
         return NULL;
 
     /* Check to see if the lun is already enabled for OAS. */
 
     list_for_each_entry(lun_info, list, listentry) {
         if ((memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
                 sizeof(struct lpfc_name)) == 0) &&
             (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
                 sizeof(struct lpfc_name)) == 0) &&
             (lun_info->device_id.lun == lun))
             return lun_info;
     }
 
     return NULL;
 }
 
 /**
  * lpfc_find_next_oas_lun - searches for the next oas lun
  * @phba: Pointer to host bus adapter structure.
  * @vport_wwpn: Pointer to vport's wwpn information
  * @target_wwpn: Pointer to target's wwpn information
  * @starting_lun: Pointer to the lun to start searching for
  * @found_vport_wwpn: Pointer to the found lun's vport wwpn information
  * @found_target_wwpn: Pointer to the found lun's target wwpn information
  * @found_lun: Pointer to the found lun.
  * @found_lun_status: Pointer to status of the found lun.
  * @found_lun_pri: Pointer to priority of the found lun.
  *
  * This routine searches the luns list for the specified lun
  * or the first lun for the vport/target.  If the vport wwpn contains
  * a zero value then a specific vport is not specified. In this case
  * any vport which contains the lun will be considered a match.  If the
  * target wwpn contains a zero value then a specific target is not specified.
  * In this case any target which contains the lun will be considered a
  * match.  If the lun is found, the lun, vport wwpn, target wwpn and lun status
  * are returned.  The function will also return the next lun if available.
  * If the next lun is not found, starting_lun parameter will be set to
  * NO_MORE_OAS_LUN.
  *
  * Return codes:
  *   non-0 - Error
  *   0 - Success
  **/
 bool
 lpfc_find_next_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
                struct lpfc_name *target_wwpn, uint64_t *starting_lun,
                struct lpfc_name *found_vport_wwpn,
                struct lpfc_name *found_target_wwpn,
                uint64_t *found_lun,
                uint32_t *found_lun_status,
                uint32_t *found_lun_pri)
 {
 
     unsigned long flags;
     struct lpfc_device_data *lun_info;
     struct lpfc_device_id *device_id;
     uint64_t lun;
     bool found = false;
 
     if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
         !starting_lun || !found_vport_wwpn ||
         !found_target_wwpn || !found_lun || !found_lun_status ||
         (*starting_lun == NO_MORE_OAS_LUN) ||
         !phba->cfg_fof)
         return false;
 
     lun = *starting_lun;
     *found_lun = NO_MORE_OAS_LUN;
     *starting_lun = NO_MORE_OAS_LUN;
 
     /* Search for lun or the lun closet in value */
 
     spin_lock_irqsave(&phba->devicelock, flags);
     list_for_each_entry(lun_info, &phba->luns, listentry) {
         if (((wwn_to_u64(vport_wwpn->u.wwn) == 0) ||
              (memcmp(&lun_info->device_id.vport_wwpn, vport_wwpn,
                 sizeof(struct lpfc_name)) == 0)) &&
             ((wwn_to_u64(target_wwpn->u.wwn) == 0) ||
              (memcmp(&lun_info->device_id.target_wwpn, target_wwpn,
                 sizeof(struct lpfc_name)) == 0)) &&
             (lun_info->oas_enabled)) {
             device_id = &lun_info->device_id;
             if ((!found) &&
                 ((lun == FIND_FIRST_OAS_LUN) ||
                  (device_id->lun == lun))) {
                 *found_lun = device_id->lun;
                 memcpy(found_vport_wwpn,
                        &device_id->vport_wwpn,
                        sizeof(struct lpfc_name));
                 memcpy(found_target_wwpn,
                        &device_id->target_wwpn,
                        sizeof(struct lpfc_name));
                 if (lun_info->available)
                     *found_lun_status =
                         OAS_LUN_STATUS_EXISTS;
                 else
                     *found_lun_status = 0;
                 *found_lun_pri = lun_info->priority;
                 if (phba->cfg_oas_flags & OAS_FIND_ANY_VPORT)
                     memset(vport_wwpn, 0x0,
                            sizeof(struct lpfc_name));
                 if (phba->cfg_oas_flags & OAS_FIND_ANY_TARGET)
                     memset(target_wwpn, 0x0,
                            sizeof(struct lpfc_name));
                 found = true;
             } else if (found) {
                 *starting_lun = device_id->lun;
                 memcpy(vport_wwpn, &device_id->vport_wwpn,
                        sizeof(struct lpfc_name));
                 memcpy(target_wwpn, &device_id->target_wwpn,
                        sizeof(struct lpfc_name));
                 break;
             }
         }
     }
     spin_unlock_irqrestore(&phba->devicelock, flags);
     return found;
 }
 
 /**
  * lpfc_enable_oas_lun - enables a lun for OAS operations
  * @phba: Pointer to host bus adapter structure.
  * @vport_wwpn: Pointer to vport's wwpn information
  * @target_wwpn: Pointer to target's wwpn information
  * @lun: Lun
  * @pri: Priority
  *
  * This routine enables a lun for oas operations.  The routines does so by
  * doing the following :
  *
  *   1) Checks to see if the device data for the lun has been created.
  *   2) If found, sets the OAS enabled flag if not set and returns.
  *   3) Otherwise, creates a device data structure.
  *   4) If successfully created, indicates the device data is for an OAS lun,
  *   indicates the lun is not available and add to the list of luns.
  *
  * Return codes:
  *   false - Error
  *   true - Success
  **/
 bool
 lpfc_enable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
             struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
 {
 
     struct lpfc_device_data *lun_info;
     unsigned long flags;
 
     if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
         !phba->cfg_fof)
         return false;
 
     spin_lock_irqsave(&phba->devicelock, flags);
 
     /* Check to see if the device data for the lun has been created */
     lun_info = __lpfc_get_device_data(phba, &phba->luns, vport_wwpn,
                       target_wwpn, lun);
     if (lun_info) {
         if (!lun_info->oas_enabled)
             lun_info->oas_enabled = true;
         lun_info->priority = pri;
         spin_unlock_irqrestore(&phba->devicelock, flags);
         return true;
     }
 
     /* Create an lun info structure and add to list of luns */
     lun_info = lpfc_create_device_data(phba, vport_wwpn, target_wwpn, lun,
                        pri, true);
     if (lun_info) {
         lun_info->oas_enabled = true;
         lun_info->priority = pri;
         lun_info->available = false;
         list_add_tail(&lun_info->listentry, &phba->luns);
         spin_unlock_irqrestore(&phba->devicelock, flags);
         return true;
     }
     spin_unlock_irqrestore(&phba->devicelock, flags);
     return false;
 }
 
 /**
  * lpfc_disable_oas_lun - disables a lun for OAS operations
  * @phba: Pointer to host bus adapter structure.
  * @vport_wwpn: Pointer to vport's wwpn information
  * @target_wwpn: Pointer to target's wwpn information
  * @lun: Lun
  * @pri: Priority
  *
  * This routine disables a lun for oas operations.  The routines does so by
  * doing the following :
  *
  *   1) Checks to see if the device data for the lun is created.
  *   2) If present, clears the flag indicating this lun is for OAS.
  *   3) If the lun is not available by the system, the device data is
  *   freed.
  *
  * Return codes:
  *   false - Error
  *   true - Success
  **/
 bool
 lpfc_disable_oas_lun(struct lpfc_hba *phba, struct lpfc_name *vport_wwpn,
              struct lpfc_name *target_wwpn, uint64_t lun, uint8_t pri)
 {
 
     struct lpfc_device_data *lun_info;
     unsigned long flags;
 
     if (unlikely(!phba) || !vport_wwpn || !target_wwpn ||
         !phba->cfg_fof)
         return false;
 
     spin_lock_irqsave(&phba->devicelock, flags);
 
     /* Check to see if the lun is available. */
     lun_info = __lpfc_get_device_data(phba,
                       &phba->luns, vport_wwpn,
                       target_wwpn, lun);
     if (lun_info) {
         lun_info->oas_enabled = false;
         lun_info->priority = pri;
         if (!lun_info->available)
             lpfc_delete_device_data(phba, lun_info);
         spin_unlock_irqrestore(&phba->devicelock, flags);
         return true;
     }
 
     spin_unlock_irqrestore(&phba->devicelock, flags);
     return false;
 }
 
 static int
 lpfc_no_command(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 {
     return SCSI_MLQUEUE_HOST_BUSY;
 }
 
 static int
 lpfc_no_slave(struct scsi_device *sdev)
 {
     return -ENODEV;
 }
 
 struct scsi_host_template lpfc_template_nvme = {
     .module         = THIS_MODULE,
     .name           = LPFC_DRIVER_NAME,
     .proc_name      = LPFC_DRIVER_NAME,
     .info           = lpfc_info,
     .queuecommand       = lpfc_no_command,
     .slave_alloc        = lpfc_no_slave,
     .slave_configure    = lpfc_no_slave,
     .scan_finished      = lpfc_scan_finished,
     .this_id        = -1,
     .sg_tablesize       = 1,
     .cmd_per_lun        = 1,
     .shost_groups       = lpfc_hba_groups,
     .max_sectors        = 0xFFFFFFFF,
     .vendor_id      = LPFC_NL_VENDOR_ID,
     .track_queue_depth  = 0,
 };
 
 struct scsi_host_template lpfc_template = {
     .module         = THIS_MODULE,
     .name           = LPFC_DRIVER_NAME,
     .proc_name      = LPFC_DRIVER_NAME,
     .info           = lpfc_info,
     .queuecommand       = lpfc_queuecommand,
     .eh_timed_out       = fc_eh_timed_out,
     .eh_should_retry_cmd    = fc_eh_should_retry_cmd,
     .eh_abort_handler   = lpfc_abort_handler,
     .eh_device_reset_handler = lpfc_device_reset_handler,
     .eh_target_reset_handler = lpfc_target_reset_handler,
     .eh_host_reset_handler  = lpfc_host_reset_handler,
     .slave_alloc        = lpfc_slave_alloc,
     .slave_configure    = lpfc_slave_configure,
     .slave_destroy      = lpfc_slave_destroy,
     .scan_finished      = lpfc_scan_finished,
     .this_id        = -1,
     .sg_tablesize       = LPFC_DEFAULT_SG_SEG_CNT,
     .cmd_per_lun        = LPFC_CMD_PER_LUN,
     .shost_groups       = lpfc_hba_groups,
     .max_sectors        = 0xFFFFFFFF,
     .vendor_id      = LPFC_NL_VENDOR_ID,
     .change_queue_depth = scsi_change_queue_depth,
     .track_queue_depth  = 1,
 };