lpfc: add Emulex FC driver version 8.0.28

From: 	James.Smart@Emulex.Com

Modified for kernel import and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 1246 insertions, 0 deletions

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
new file mode 100644
index 000000000000..42fab03ad2ba
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -0,0 +1,1246 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Enterprise Fibre Channel Host Bus Adapters.                     *
+ * Refer to the README file included with this package for         *
+ * driver version and adapter support.                             *
+ * Copyright (C) 2004 Emulex Corporation.                          *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of the GNU General Public License     *
+ * as published by the Free Software Foundation; either version 2  *
+ * of the License, or (at your option) any later version.          *
+ *                                                                 *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of  *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   *
+ * GNU General Public License for more details, a copy of which    *
+ * can be found in the file COPYING included with this package.    *
+ *******************************************************************/
+
+/*
+ * $Id: lpfc_scsi.c 1.37 2005/04/13 14:27:09EDT sf_support Exp  $
+ */
+
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_transport_fc.h>
+
+#include "lpfc_version.h"
+#include "lpfc_hw.h"
+#include "lpfc_sli.h"
+#include "lpfc_disc.h"
+#include "lpfc_scsi.h"
+#include "lpfc.h"
+#include "lpfc_logmsg.h"
+#include "lpfc_crtn.h"
+
+#define LPFC_RESET_WAIT  2
+#define LPFC_ABORT_WAIT  2
+
+static inline void lpfc_put_lun(struct fcp_cmnd *fcmd, unsigned int lun)
+{
+	fcmd->fcpLunLsl = 0;
+	fcmd->fcpLunMsl = swab16((uint16_t)lun);
+}
+
+/*
+ * This routine allocates a scsi buffer, which 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 inital BPL.  In addition to
+ * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
+ * and the BPL BDE is setup in the IOCB.
+ */
+static struct lpfc_scsi_buf *
+lpfc_get_scsi_buf(struct lpfc_hba * phba)
+{
+	struct lpfc_scsi_buf *psb;
+	struct ulp_bde64 *bpl;
+	IOCB_t *iocb;
+	dma_addr_t pdma_phys;
+
+	psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
+	if (!psb)
+		return NULL;
+	memset(psb, 0, sizeof (struct lpfc_scsi_buf));
+	psb->scsi_hba = phba;
+
+	/*
+	 * 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 = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
+							&psb->dma_handle);
+	if (!psb->data) {
+		kfree(psb);
+		return NULL;
+	}
+
+	/* Initialize virtual ptrs to dma_buf region. */
+	memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
+
+	psb->fcp_cmnd = psb->data;
+	psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
+	psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
+							sizeof(struct fcp_rsp);
+
+	/* Initialize local short-hand pointers. */
+	bpl = psb->fcp_bpl;
+	pdma_phys = psb->dma_handle;
+
+	/*
+	 * 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->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
+	bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
+	bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
+	bpl->tus.f.bdeFlags = BUFF_USE_CMND;
+	bpl->tus.w = le32_to_cpu(bpl->tus.w);
+	bpl++;
+
+	/* Setup the physical region for the FCP RSP */
+	pdma_phys += sizeof (struct fcp_cmnd);
+	bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
+	bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
+	bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
+	bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
+	bpl->tus.w = le32_to_cpu(bpl->tus.w);
+
+	/*
+	 * Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
+	 * initialize it with all known data now.
+	 */
+	pdma_phys += (sizeof (struct fcp_rsp));
+	iocb = &psb->cur_iocbq.iocb;
+	iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
+	iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
+	iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
+	iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
+	iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
+	iocb->ulpBdeCount = 1;
+	iocb->ulpClass = CLASS3;
+
+	return psb;
+}
+
+static void
+lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
+{
+	struct lpfc_hba *phba = psb->scsi_hba;
+
+	/*
+	 * 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) && (psb->pCmd->use_sg)) {
+		dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
+				psb->seg_cnt, psb->pCmd->sc_data_direction);
+	} else {
+		 if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
+			dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
+						psb->pCmd->request_bufflen,
+						psb->pCmd->sc_data_direction);
+		 }
+	}
+
+	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
+}
+
+static int
+lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_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 = lpfc_cmd->fcp_bpl;
+	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
+	dma_addr_t physaddr;
+	uint32_t i, num_bde = 0;
+	int datadir = scsi_cmnd->sc_data_direction;
+	int dma_error;
+
+	/*
+	 * 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_cmnd->use_sg) {
+		/*
+		 * The driver stores the segment count returned from pci_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.
+		 */
+		sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
+		lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
+						scsi_cmnd->use_sg, datadir);
+		if (lpfc_cmd->seg_cnt == 0)
+			return 1;
+
+		if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
+			printk(KERN_ERR "%s: Too many sg segments from "
+			       "dma_map_sg.  Config %d, seg_cnt %d",
+			       __FUNCTION__, phba->cfg_sg_seg_cnt,
+			       lpfc_cmd->seg_cnt);
+			dma_unmap_sg(&phba->pcidev->dev, sgel,
+				     lpfc_cmd->seg_cnt, datadir);
+			return 1;
+		}
+
+		/*
+		 * 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.
+		 */
+		for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
+			physaddr = sg_dma_address(sgel);
+			bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
+			bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
+			bpl->tus.f.bdeSize = sg_dma_len(sgel);
+			if (datadir == DMA_TO_DEVICE)
+				bpl->tus.f.bdeFlags = 0;
+			else
+				bpl->tus.f.bdeFlags = BUFF_USE_RCV;
+			bpl->tus.w = le32_to_cpu(bpl->tus.w);
+			bpl++;
+			sgel++;
+			num_bde++;
+		}
+	} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
+		physaddr = dma_map_single(&phba->pcidev->dev,
+					  scsi_cmnd->request_buffer,
+					  scsi_cmnd->request_bufflen,
+					  datadir);
+		dma_error = dma_mapping_error(physaddr);
+		if (dma_error) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+				"%d:0718 Unable to dma_map_single "
+				"request_buffer: x%x\n",
+				phba->brd_no, dma_error);
+			return 1;
+		}
+
+		lpfc_cmd->nonsg_phys = physaddr;
+		bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
+		bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
+		bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
+		if (datadir == DMA_TO_DEVICE)
+			bpl->tus.f.bdeFlags = 0;
+		bpl->tus.w = le32_to_cpu(bpl->tus.w);
+		num_bde = 1;
+		bpl++;
+	}
+
+	/*
+	 * Finish initializing those IOCB fields that are dependent on the
+	 * scsi_cmnd request_buffer
+	 */
+	iocb_cmd->un.fcpi64.bdl.bdeSize +=
+		(num_bde * sizeof (struct ulp_bde64));
+	iocb_cmd->ulpBdeCount = 1;
+	iocb_cmd->ulpLe = 1;
+	fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
+	return 0;
+}
+
+static void
+lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
+{
+	struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
+	struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
+	struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
+	struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
+	uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
+	uint32_t resp_info = fcprsp->rspStatus2;
+	uint32_t scsi_status = fcprsp->rspStatus3;
+	uint32_t host_status = DID_OK;
+	uint32_t rsplen = 0;
+
+	/*
+	 *  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;
+	}
+
+	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
+			"%d:0730 FCP command failed: RSP "
+			"Data: x%x x%x x%x x%x x%x x%x\n",
+			phba->brd_no, resp_info, scsi_status,
+			be32_to_cpu(fcprsp->rspResId),
+			be32_to_cpu(fcprsp->rspSnsLen),
+			be32_to_cpu(fcprsp->rspRspLen),
+			fcprsp->rspInfo3);
+
+	if (resp_info & RSP_LEN_VALID) {
+		rsplen = be32_to_cpu(fcprsp->rspRspLen);
+		if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
+		    (fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
+			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;
+
+		memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
+	}
+
+	cmnd->resid = 0;
+	if (resp_info & RESID_UNDER) {
+		cmnd->resid = be32_to_cpu(fcprsp->rspResId);
+
+		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+				"%d:0716 FCP Read Underrun, expected %d, "
+				"residual %d Data: x%x x%x x%x\n", phba->brd_no,
+				be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
+				fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
+
+		/*
+		 * The cmnd->underflow is the minimum number of bytes that must
+		 * be transfered 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) &&
+		    (cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
+			lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+					"%d:0717 FCP command x%x residual "
+					"underrun converted to error "
+					"Data: x%x x%x x%x\n", phba->brd_no,
+					cmnd->cmnd[0], cmnd->request_bufflen,
+					cmnd->resid, cmnd->underflow);
+
+			host_status = DID_ERROR;
+		}
+	} else if (resp_info & RESID_OVER) {
+		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
+				"%d:0720 FCP command x%x residual "
+				"overrun error. Data: x%x x%x \n",
+				phba->brd_no, cmnd->cmnd[0],
+				cmnd->request_bufflen, cmnd->resid);
+		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 ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
+			(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
+		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
+			"%d:0734 FCP Read Check Error Data: "
+			"x%x x%x x%x x%x\n", phba->brd_no,
+			be32_to_cpu(fcpcmd->fcpDl),
+			be32_to_cpu(fcprsp->rspResId),
+			fcpi_parm, cmnd->cmnd[0]);
+		host_status = DID_ERROR;
+		cmnd->resid = cmnd->request_bufflen;
+	}
+
+ out:
+	cmnd->result = ScsiResult(host_status, scsi_status);
+}
+
+static void
+lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
+			struct lpfc_iocbq *pIocbOut)
+{
+	struct lpfc_scsi_buf *lpfc_cmd =
+		(struct lpfc_scsi_buf *) pIocbIn->context1;
+	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
+	struct lpfc_nodelist *pnode = rdata->pnode;
+	struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
+	unsigned long iflag;
+
+	lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
+	lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
+
+	if (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;
+
+		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
+				"%d:0729 FCP cmd x%x failed <%d/%d> status: "
+				"x%x result: x%x Data: x%x x%x\n",
+				phba->brd_no, cmd->cmnd[0], cmd->device->id,
+				cmd->device->lun, lpfc_cmd->status,
+				lpfc_cmd->result, 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(lpfc_cmd);
+			break;
+		case IOSTAT_NPORT_BSY:
+		case IOSTAT_FABRIC_BSY:
+			cmd->result = ScsiResult(DID_BUS_BUSY, 0);
+			break;
+		default:
+			cmd->result = ScsiResult(DID_ERROR, 0);
+			break;
+		}
+
+		if (pnode) {
+			if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
+				cmd->result = ScsiResult(DID_BUS_BUSY,
+					SAM_STAT_BUSY);
+		}
+		else {
+			cmd->result = ScsiResult(DID_NO_CONNECT, 0);
+		}
+	} else {
+		cmd->result = ScsiResult(DID_OK, 0);
+	}
+
+	if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
+		uint32_t *lp = (uint32_t *)cmd->sense_buffer;
+
+		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+				"%d:0710 Iodone <%d/%d> cmd %p, error x%x "
+				"SNS x%x x%x Data: x%x x%x\n",
+				phba->brd_no, cmd->device->id,
+				cmd->device->lun, cmd, cmd->result,
+				*lp, *(lp + 3), cmd->retries, cmd->resid);
+	}
+
+	spin_lock_irqsave(phba->host->host_lock, iflag);
+	lpfc_free_scsi_buf(lpfc_cmd);
+	cmd->host_scribble = NULL;
+	spin_unlock_irqrestore(phba->host->host_lock, iflag);
+
+	cmd->scsi_done(cmd);
+}
+
+static void
+lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
+			struct lpfc_nodelist *pnode)
+{
+	struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
+	struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
+	IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
+	struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
+	int datadir = scsi_cmnd->sc_data_direction;
+
+	lpfc_cmd->fcp_rsp->rspSnsLen = 0;
+
+	lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
+
+	memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
+
+	if (scsi_cmnd->device->tagged_supported) {
+		switch (scsi_cmnd->tag) {
+		case HEAD_OF_QUEUE_TAG:
+			fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
+			break;
+		case ORDERED_QUEUE_TAG:
+			fcp_cmnd->fcpCntl1 = ORDERED_Q;
+			break;
+		default:
+			fcp_cmnd->fcpCntl1 = SIMPLE_Q;
+			break;
+		}
+	} else
+		fcp_cmnd->fcpCntl1 = 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_cmnd->use_sg) {
+		if (datadir == DMA_TO_DEVICE) {
+			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
+			iocb_cmd->un.fcpi.fcpi_parm = 0;
+			iocb_cmd->ulpPU = 0;
+			fcp_cmnd->fcpCntl3 = WRITE_DATA;
+			phba->fc4OutputRequests++;
+		} else {
+			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
+			iocb_cmd->ulpPU = PARM_READ_CHECK;
+			iocb_cmd->un.fcpi.fcpi_parm =
+				scsi_cmnd->request_bufflen;
+			fcp_cmnd->fcpCntl3 = READ_DATA;
+			phba->fc4InputRequests++;
+		}
+	} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
+		if (datadir == DMA_TO_DEVICE) {
+			iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
+			iocb_cmd->un.fcpi.fcpi_parm = 0;
+			iocb_cmd->ulpPU = 0;
+			fcp_cmnd->fcpCntl3 = WRITE_DATA;
+			phba->fc4OutputRequests++;
+		} else {
+			iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
+			iocb_cmd->ulpPU = PARM_READ_CHECK;
+			iocb_cmd->un.fcpi.fcpi_parm =
+				scsi_cmnd->request_bufflen;
+			fcp_cmnd->fcpCntl3 = READ_DATA;
+			phba->fc4InputRequests++;
+		}
+	} else {
+		iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
+		iocb_cmd->un.fcpi.fcpi_parm = 0;
+		iocb_cmd->ulpPU = 0;
+		fcp_cmnd->fcpCntl3 = 0;
+		phba->fc4ControlRequests++;
+	}
+
+	/*
+	 * 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;
+
+	piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
+	piocbq->context1  = lpfc_cmd;
+	piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
+	piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
+}
+
+static int
+lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
+			     struct lpfc_scsi_buf *lpfc_cmd,
+			     uint8_t task_mgmt_cmd)
+{
+	struct lpfc_sli *psli;
+	struct lpfc_iocbq *piocbq;
+	IOCB_t *piocb;
+	struct fcp_cmnd *fcp_cmnd;
+	struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
+	struct lpfc_rport_data *rdata = scsi_dev->hostdata;
+	struct lpfc_nodelist *ndlp = rdata->pnode;
+
+	if ((ndlp == 0) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
+		return 0;
+	}
+
+	psli = &phba->sli;
+	piocbq = &(lpfc_cmd->cur_iocbq);
+	piocb = &piocbq->iocb;
+
+	fcp_cmnd = lpfc_cmd->fcp_cmnd;
+	lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->lun);
+	fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
+
+	piocb->ulpCommand = CMD_FCP_ICMND64_CR;
+
+	piocb->ulpContext = ndlp->nlp_rpi;
+	if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
+		piocb->ulpFCP2Rcvy = 1;
+	}
+	piocb->ulpClass = (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.
+		 */
+		piocb->ulpTimeout = 0;
+	} else {
+		piocb->ulpTimeout = lpfc_cmd->timeout;
+	}
+
+	lpfc_cmd->rdata = rdata;
+
+	switch (task_mgmt_cmd) {
+	case FCP_LUN_RESET:
+		/* Issue LUN Reset to TGT <num> LUN <num> */
+		lpfc_printf_log(phba,
+				KERN_INFO,
+				LOG_FCP,
+				"%d:0703 Issue LUN Reset to TGT %d LUN %d "
+				"Data: x%x x%x\n",
+				phba->brd_no,
+				scsi_dev->id, scsi_dev->lun,
+				ndlp->nlp_rpi, ndlp->nlp_flag);
+
+		break;
+	case FCP_ABORT_TASK_SET:
+		/* Issue Abort Task Set to TGT <num> LUN <num> */
+		lpfc_printf_log(phba,
+				KERN_INFO,
+				LOG_FCP,
+				"%d:0701 Issue Abort Task Set to TGT %d LUN %d "
+				"Data: x%x x%x\n",
+				phba->brd_no,
+				scsi_dev->id, scsi_dev->lun,
+				ndlp->nlp_rpi, ndlp->nlp_flag);
+
+		break;
+	case FCP_TARGET_RESET:
+		/* Issue Target Reset to TGT <num> */
+		lpfc_printf_log(phba,
+				KERN_INFO,
+				LOG_FCP,
+				"%d:0702 Issue Target Reset to TGT %d "
+				"Data: x%x x%x\n",
+				phba->brd_no,
+				scsi_dev->id, ndlp->nlp_rpi,
+				ndlp->nlp_flag);
+		break;
+	}
+
+	return (1);
+}
+
+static int
+lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
+{
+	struct lpfc_iocbq *iocbq;
+	struct lpfc_iocbq *iocbqrsp = NULL;
+	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
+	int ret;
+
+	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
+	if (!ret)
+		return FAILED;
+
+	lpfc_cmd->scsi_hba = phba;
+	iocbq = &lpfc_cmd->cur_iocbq;
+	list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
+	if (!iocbqrsp)
+		return FAILED;
+	memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
+
+	iocbq->iocb_flag |= LPFC_IO_POLL;
+	ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
+		     &phba->sli.ring[phba->sli.fcp_ring],
+		     iocbq, SLI_IOCB_HIGH_PRIORITY,
+		     iocbqrsp,
+		     lpfc_cmd->timeout);
+	if (ret != IOCB_SUCCESS) {
+		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
+		ret = FAILED;
+	} else {
+		ret = SUCCESS;
+		lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
+		lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
+		if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
+			(lpfc_cmd->result & IOERR_DRVR_MASK))
+				lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
+	}
+
+	/*
+	 * All outstanding txcmplq I/Os should have been aborted by the target.
+	 * Unfortunately, some targets do not abide by this forcing the driver
+	 * to double check.
+	 */
+	lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
+			    lpfc_cmd->pCmd->device->id,
+			    lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
+
+	/* Return response IOCB to free list. */
+	list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
+	return ret;
+}
+
+static void
+lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
+			    struct lpfc_iocbq *pIocbOut)
+{
+	unsigned long iflag;
+	struct lpfc_scsi_buf *lpfc_cmd =
+		(struct lpfc_scsi_buf *) pIocbIn->context1;
+
+	spin_lock_irqsave(phba->host->host_lock, iflag);
+	lpfc_free_scsi_buf(lpfc_cmd);
+	spin_unlock_irqrestore(phba->host->host_lock, iflag);
+}
+
+static void
+lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
+				struct lpfc_iocbq *pIocbIn,
+				struct lpfc_iocbq *pIocbOut)
+{
+	struct scsi_cmnd *ml_cmd =
+		((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
+
+	lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
+	ml_cmd->host_scribble = NULL;
+}
+
+const char *
+lpfc_info(struct Scsi_Host *host)
+{
+	struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata[0];
+	int len;
+	static char  lpfcinfobuf[384];
+
+	memset(lpfcinfobuf,0,384);
+	if (phba && phba->pcidev){
+		strncpy(lpfcinfobuf, phba->ModelDesc, 256);
+		len = strlen(lpfcinfobuf);
+		snprintf(lpfcinfobuf + len,
+			384-len,
+			" on PCI bus %02x device %02x irq %d",
+			phba->pcidev->bus->number,
+			phba->pcidev->devfn,
+			phba->pcidev->irq);
+		len = strlen(lpfcinfobuf);
+		if (phba->Port[0]) {
+			snprintf(lpfcinfobuf + len,
+				 384-len,
+				 " port %s",
+				 phba->Port);
+		}
+	}
+	return lpfcinfobuf;
+}
+
+static int
+lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
+{
+	struct lpfc_hba *phba =
+		(struct lpfc_hba *) cmnd->device->host->hostdata[0];
+	struct lpfc_sli *psli = &phba->sli;
+	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
+	struct lpfc_nodelist *ndlp = rdata->pnode;
+	struct lpfc_scsi_buf *lpfc_cmd = NULL;
+	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
+	int err = 0;
+
+	/*
+	 * The target pointer is guaranteed not to be NULL because the driver
+	 * only clears the device->hostdata field in lpfc_slave_destroy.  This
+	 * approach guarantees no further IO calls on this target.
+	 */
+	if (!ndlp) {
+		cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
+		goto out_fail_command;
+	}
+
+	/*
+	 * A Fibre Channel target is present and functioning only when the node
+	 * state is MAPPED.  Any other state is a failure.
+	 */
+	if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
+		if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
+		    (ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
+			cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
+			goto out_fail_command;
+		}
+		/*
+		 * The device is most likely recovered and the driver
+		 * needs a bit more time to finish.  Ask the midlayer
+		 * to retry.
+		 */
+		goto out_host_busy;
+	}
+
+	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
+	if (lpfc_cmd == NULL) {
+		printk(KERN_WARNING "%s: No buffer available - list empty, "
+		       "total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
+		goto out_host_busy;
+	}
+
+	/*
+	 * 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->timeout = 0;
+	cmnd->host_scribble = (unsigned char *)lpfc_cmd;
+	cmnd->scsi_done = done;
+
+	err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
+	if (err)
+		goto out_host_busy_free_buf;
+
+	lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
+
+	err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
+				&lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
+	if (err)
+		goto out_host_busy_free_buf;
+	return 0;
+
+ out_host_busy_free_buf:
+	lpfc_free_scsi_buf(lpfc_cmd);
+	cmnd->host_scribble = NULL;
+ out_host_busy:
+	return SCSI_MLQUEUE_HOST_BUSY;
+
+ out_fail_command:
+	done(cmnd);
+	return 0;
+}
+
+static int
+lpfc_abort_handler(struct scsi_cmnd *cmnd)
+{
+	struct lpfc_hba *phba =
+			(struct lpfc_hba *)cmnd->device->host->hostdata[0];
+	struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
+	struct lpfc_iocbq *iocb, *next_iocb;
+	struct lpfc_iocbq *abtsiocb = NULL;
+	struct lpfc_scsi_buf *lpfc_cmd;
+	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
+	IOCB_t *cmd, *icmd;
+	unsigned long snum;
+	unsigned int id, lun;
+	unsigned int loop_count = 0;
+	int ret = IOCB_SUCCESS;
+
+	/*
+	 * If the host_scribble data area is NULL, then the driver has already
+	 * completed this command, but the midlayer did not see the completion
+	 * before the eh fired.  Just return SUCCESS.
+	 */
+	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
+	if (!lpfc_cmd)
+		return SUCCESS;
+
+	/* save these now since lpfc_cmd can be freed */
+	id   = lpfc_cmd->pCmd->device->id;
+	lun  = lpfc_cmd->pCmd->device->lun;
+	snum = lpfc_cmd->pCmd->serial_number;
+
+	list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
+		cmd = &iocb->iocb;
+		if (iocb->context1 != lpfc_cmd)
+			continue;
+
+		list_del_init(&iocb->list);
+		pring->txq_cnt--;
+		if (!iocb->iocb_cmpl) {
+			list_add_tail(&iocb->list, lpfc_iocb_list);
+		}
+		else {
+			cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
+			cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
+			lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
+		}
+
+		goto out;
+	}
+
+	list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
+	if (abtsiocb == NULL)
+		return FAILED;
+
+	memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
+
+	/*
+	 * The scsi command was not in the txq.  Check the txcmplq and if it is
+	 * found, send an abort to the FW.
+	 */
+	list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
+		if (iocb->context1 != lpfc_cmd)
+			continue;
+
+		iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
+		cmd = &iocb->iocb;
+		icmd = &abtsiocb->iocb;
+		icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
+		icmd->un.acxri.abortContextTag = cmd->ulpContext;
+		icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
+
+		icmd->ulpLe = 1;
+		icmd->ulpClass = cmd->ulpClass;
+		if (phba->hba_state >= LPFC_LINK_UP)
+			icmd->ulpCommand = CMD_ABORT_XRI_CN;
+		else
+			icmd->ulpCommand = CMD_CLOSE_XRI_CN;
+
+		if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
+								IOCB_ERROR) {
+			list_add_tail(&abtsiocb->list, lpfc_iocb_list);
+			ret = IOCB_ERROR;
+			break;
+		}
+
+		/* Wait for abort to complete */
+		while (cmnd->host_scribble)
+		{
+			spin_unlock_irq(phba->host->host_lock);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(LPFC_ABORT_WAIT*HZ);
+			spin_lock_irq(phba->host->host_lock);
+			if (++loop_count
+			    > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
+				break;
+		}
+
+		if(cmnd->host_scribble) {
+			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+					"%d:0748 abort handler timed "
+					"out waiting for abort to "
+					"complete. Data: "
+					"x%x x%x x%x x%lx\n",
+					phba->brd_no, ret, id, lun, snum);
+			cmnd->host_scribble = NULL;
+			iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
+			ret = IOCB_ERROR;
+		}
+
+		break;
+	}
+
+ out:
+	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
+			"%d:0749 SCSI layer issued abort device "
+			"Data: x%x x%x x%x x%lx\n",
+			phba->brd_no, ret, id, lun, snum);
+
+	return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
+}
+
+static int
+lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
+{
+	struct Scsi_Host *shost = cmnd->device->host;
+	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
+	struct lpfc_sli *psli = &phba->sli;
+	struct lpfc_scsi_buf *lpfc_cmd = NULL;
+	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
+	struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
+	struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
+	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
+	struct lpfc_nodelist *pnode = rdata->pnode;
+	int ret = FAILED;
+	int cnt, loopcnt;
+
+	/*
+	 * If target is not in a MAPPED state, delay the reset until
+	 * target is rediscovered or nodev timeout expires.
+	 */
+	while ( 1 ) {
+		if (!pnode)
+			break;
+
+		if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
+			spin_unlock_irq(phba->host->host_lock);
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout( HZ/2);
+			spin_lock_irq(phba->host->host_lock);
+		}
+		if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
+			break;
+	}
+
+	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
+	if (lpfc_cmd == NULL)
+		goto out;
+
+	lpfc_cmd->pCmd = cmnd;
+	lpfc_cmd->timeout = 60;
+	lpfc_cmd->scsi_hba = phba;
+
+	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
+	if (!ret)
+		goto out_free_scsi_buf;
+
+	iocbq = &lpfc_cmd->cur_iocbq;
+
+	/* get a buffer for this IOCB command response */
+	list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
+	if (iocbqrsp == NULL)
+		goto out_free_scsi_buf;
+
+	memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
+
+	iocbq->iocb_flag |= LPFC_IO_POLL;
+	iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
+
+	ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
+		     &phba->sli.ring[psli->fcp_ring],
+		     iocbq, 0, iocbqrsp, 60);
+	if (ret == IOCB_SUCCESS)
+		ret = SUCCESS;
+
+	lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
+	lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
+	if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
+		if (lpfc_cmd->result & IOERR_DRVR_MASK)
+			lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
+
+	/*
+	 * All outstanding txcmplq I/Os should have been aborted by the target.
+	 * Unfortunately, some targets do not abide by this forcing the driver
+	 * to double check.
+	 */
+	lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
+			    cmnd->device->id, cmnd->device->lun, 0,
+			    LPFC_CTX_LUN);
+
+	loopcnt = 0;
+	while((cnt = lpfc_sli_sum_iocb(phba,
+				       &phba->sli.ring[phba->sli.fcp_ring],
+				       cmnd->device->id, cmnd->device->lun,
+				       LPFC_CTX_LUN))) {
+		spin_unlock_irq(phba->host->host_lock);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(LPFC_RESET_WAIT*HZ);
+		spin_lock_irq(phba->host->host_lock);
+
+		if (++loopcnt
+		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
+			break;
+	}
+
+	if (cnt) {
+		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+			"%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
+			phba->brd_no, cnt);
+	}
+
+	list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
+
+out_free_scsi_buf:
+	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+			"%d:0713 SCSI layer issued LUN reset (%d, %d) "
+			"Data: x%x x%x x%x\n",
+			phba->brd_no, lpfc_cmd->pCmd->device->id,
+			lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
+			lpfc_cmd->result);
+	lpfc_free_scsi_buf(lpfc_cmd);
+out:
+	return ret;
+}
+
+/*
+ * Note: midlayer calls this function with the host_lock held
+ */
+static int
+lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
+{
+	struct Scsi_Host *shost = cmnd->device->host;
+	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
+	struct lpfc_nodelist *ndlp = NULL;
+	int match;
+	int ret = FAILED, i, err_count = 0;
+	int cnt, loopcnt;
+	unsigned int midlayer_id = 0;
+	struct lpfc_scsi_buf * lpfc_cmd = NULL;
+	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
+
+	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
+	if (lpfc_cmd == NULL)
+		goto out;
+
+	/* The lpfc_cmd storage is reused.  Set all loop invariants. */
+	lpfc_cmd->timeout = 60;
+	lpfc_cmd->pCmd = cmnd;
+	lpfc_cmd->scsi_hba = phba;
+
+	/*
+	 * Since the driver manages a single bus device, reset all
+	 * targets known to the driver.  Should any target reset
+	 * fail, this routine returns failure to the midlayer.
+	 */
+	midlayer_id = cmnd->device->id;
+	for (i = 0; i < MAX_FCP_TARGET; i++) {
+		/* Search the mapped list for this target ID */
+		match = 0;
+		list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
+			if ((i == ndlp->nlp_sid) && ndlp->rport) {
+				match = 1;
+				break;
+			}
+		}
+		if (!match)
+			continue;
+
+		lpfc_cmd->pCmd->device->id = i;
+		lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
+		ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
+		if (ret != SUCCESS) {
+			lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+				"%d:0713 Bus Reset on target %d failed\n",
+				phba->brd_no, i);
+			err_count++;
+		}
+	}
+
+	cmnd->device->id = midlayer_id;
+	loopcnt = 0;
+	while((cnt = lpfc_sli_sum_iocb(phba,
+				&phba->sli.ring[phba->sli.fcp_ring],
+				0, 0, LPFC_CTX_HOST))) {
+		spin_unlock_irq(phba->host->host_lock);
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(LPFC_RESET_WAIT*HZ);
+		spin_lock_irq(phba->host->host_lock);
+
+		if (++loopcnt
+		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
+			break;
+	}
+
+	if (cnt) {
+		/* flush all outstanding commands on the host */
+		i = lpfc_sli_abort_iocb(phba,
+				&phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
+				LPFC_CTX_HOST);
+
+		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
+		   "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
+		   phba->brd_no, cnt, i);
+	}
+
+	if (!err_count)
+		ret = SUCCESS;
+
+	lpfc_free_scsi_buf(lpfc_cmd);
+	lpfc_printf_log(phba,
+			KERN_ERR,
+			LOG_FCP,
+			"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
+			phba->brd_no, ret);
+out:
+	return ret;
+}
+
+static int
+lpfc_slave_alloc(struct scsi_device *sdev)
+{
+	struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
+	struct lpfc_nodelist *ndlp = NULL;
+	int match = 0;
+	struct lpfc_scsi_buf *scsi_buf = NULL;
+	uint32_t total = 0, i;
+	uint32_t num_to_alloc = 0;
+	unsigned long flags;
+	struct list_head *listp;
+	struct list_head *node_list[6];
+
+	/*
+	 * Store the target pointer in the scsi_device hostdata pointer provided
+	 * the driver has already discovered the target id.
+	 */
+
+	/* Search the nlp lists other than unmap_list for this target ID */
+	node_list[0] = &phba->fc_npr_list;
+	node_list[1] = &phba->fc_nlpmap_list;
+	node_list[2] = &phba->fc_prli_list;
+	node_list[3] = &phba->fc_reglogin_list;
+	node_list[4] = &phba->fc_adisc_list;
+	node_list[5] = &phba->fc_plogi_list;
+
+	for (i = 0; i < 6 && !match; i++) {
+		listp = node_list[i];
+		if (list_empty(listp))
+			continue;
+		list_for_each_entry(ndlp, listp, nlp_listp) {
+			if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
+				match = 1;
+				break;
+			}
+		}
+	}
+
+	if (!match)
+		return -ENXIO;
+
+	sdev->hostdata = ndlp->rport->dd_data;
+
+	/*
+	 * 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.  Note
+	 * that this list of scsi bufs exists for the lifetime of the driver.
+	 */
+	total = phba->total_scsi_bufs;
+	num_to_alloc = LPFC_CMD_PER_LUN;
+	if (total >= phba->cfg_hba_queue_depth) {
+		printk(KERN_WARNING "%s, At config limitation of "
+		       "%d allocated scsi_bufs\n", __FUNCTION__, total);
+		return 0;
+	} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
+		num_to_alloc = phba->cfg_hba_queue_depth - total;
+	}
+
+	for (i = 0; i < num_to_alloc; i++) {
+		scsi_buf = lpfc_get_scsi_buf(phba);
+		if (!scsi_buf) {
+			printk(KERN_ERR "%s, failed to allocate "
+			       "scsi_buf\n", __FUNCTION__);
+			break;
+		}
+
+		spin_lock_irqsave(phba->host->host_lock, flags);
+		phba->total_scsi_bufs++;
+		list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
+		spin_unlock_irqrestore(phba->host->host_lock, flags);
+	}
+	return 0;
+}
+
+static int
+lpfc_slave_configure(struct scsi_device *sdev)
+{
+	struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
+	struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
+
+	if (sdev->tagged_supported)
+		scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
+	else
+		scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
+
+	/*
+	 * Initialize the fc transport attributes for the target
+	 * containing this scsi device.  Also note that the driver's
+	 * target pointer is stored in the starget_data for the
+	 * driver's sysfs entry point functions.
+	 */
+	rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
+
+	return 0;
+}
+
+static void
+lpfc_slave_destroy(struct scsi_device *sdev)
+{
+	sdev->hostdata = NULL;
+	return;
+}
+
+struct scsi_host_template lpfc_template = {
+	.module			= THIS_MODULE,
+	.name			= LPFC_DRIVER_NAME,
+	.info			= lpfc_info,
+	.queuecommand		= lpfc_queuecommand,
+	.eh_abort_handler	= lpfc_abort_handler,
+	.eh_device_reset_handler= lpfc_reset_lun_handler,
+	.eh_bus_reset_handler	= lpfc_reset_bus_handler,
+	.slave_alloc		= lpfc_slave_alloc,
+	.slave_configure	= lpfc_slave_configure,
+	.slave_destroy		= lpfc_slave_destroy,
+	.this_id		= -1,
+	.sg_tablesize		= LPFC_SG_SEG_CNT,
+	.cmd_per_lun		= LPFC_CMD_PER_LUN,
+	.use_clustering		= ENABLE_CLUSTERING,
+	.shost_attrs		= lpfc_host_attrs,
+};