lpfc_scsi.c 35.9 KB
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/*******************************************************************
 * This file is part of the Emulex Linux Device Driver for         *
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 * Fibre Channel Host Bus Adapters.                                *
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 * Copyright (C) 2004-2006 Emulex.  All rights reserved.           *
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 * EMULEX and SLI are trademarks of Emulex.                        *
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 * www.emulex.com                                                  *
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 * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
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 *                                                                 *
 * This program is free software; you can redistribute it and/or   *
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 * 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.                                     *
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 *******************************************************************/

#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


/*
 * 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 *
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lpfc_new_scsi_buf(struct lpfc_hba * phba)
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{
	struct lpfc_scsi_buf *psb;
	struct ulp_bde64 *bpl;
	IOCB_t *iocb;
	dma_addr_t pdma_phys;
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	uint16_t iotag;
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	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);

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	/* Allocate iotag for psb->cur_iocbq. */
	iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
	if (iotag == 0) {
		pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
			      psb->data, psb->dma_handle);
		kfree (psb);
		return NULL;
	}
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	psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
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	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;
}

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static struct lpfc_scsi_buf*
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lpfc_get_scsi_buf(struct lpfc_hba * phba)
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{
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	struct  lpfc_scsi_buf * lpfc_cmd = NULL;
	struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
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	unsigned long iflag = 0;
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	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
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	list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
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	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
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	return  lpfc_cmd;
}
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static void
lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
{
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	unsigned long iflag = 0;
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	spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
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	psb->pCmd = NULL;
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	list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
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	spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
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}

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;
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		else
			bpl->tus.f.bdeFlags = BUFF_USE_RCV;
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		bpl->tus.w = le32_to_cpu(bpl->tus.w);
		num_bde = 1;
		bpl++;
	}

	/*
	 * Finish initializing those IOCB fields that are dependent on the
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	 * 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.
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	 */
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	iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
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	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;
}

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static void
lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_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) && (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);
		 }
	}
}

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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;
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	int result;
	struct scsi_device *sdev, *tmp_sdev;
	int depth = 0;
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	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;
		}

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		if ((pnode == NULL )
		    || (pnode->nlp_state != NLP_STE_MAPPED_NODE))
			cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
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	} 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);
	}

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	result = cmd->result;
	sdev = cmd->device;
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	cmd->scsi_done(cmd);

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	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
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		lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
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		lpfc_release_scsi_buf(phba, lpfc_cmd);
		return;
	}

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	if (!result && pnode != NULL &&
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	   ((jiffies - pnode->last_ramp_up_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
	   ((jiffies - pnode->last_q_full_time) >
		LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
	   (phba->cfg_lun_queue_depth > sdev->queue_depth)) {
		shost_for_each_device(tmp_sdev, sdev->host) {
			if (phba->cfg_lun_queue_depth > tmp_sdev->queue_depth) {
				if (tmp_sdev->id != sdev->id)
					continue;
				if (tmp_sdev->ordered_tags)
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_ORDERED_TAG,
						tmp_sdev->queue_depth+1);
				else
					scsi_adjust_queue_depth(tmp_sdev,
						MSG_SIMPLE_TAG,
						tmp_sdev->queue_depth+1);

				pnode->last_ramp_up_time = jiffies;
			}
		}
	}

	/*
	 * Check for queue full.  If the lun is reporting queue full, then
	 * back off the lun queue depth to prevent target overloads.
	 */
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	if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
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		pnode->last_q_full_time = jiffies;

		shost_for_each_device(tmp_sdev, sdev->host) {
			if (tmp_sdev->id != sdev->id)
				continue;
			depth = scsi_track_queue_full(tmp_sdev,
					tmp_sdev->queue_depth - 1);
		}
		/*
 		 * The queue depth cannot be lowered any more.
		 * Modify the returned error code to store
		 * the final depth value set by
		 * scsi_track_queue_full.
		 */
		if (depth == -1)
			depth = sdev->host->cmd_per_lun;

		if (depth) {
			lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0711 detected queue full - lun queue depth "
				" adjusted to %d.\n", phba->brd_no, depth);
		}
	}

520
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
521
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
522 523 524 525 526 527 528 529 530 531 532 533 534
}

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;
535 536
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
537

538 539
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624

	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;
625
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
626 627
	struct lpfc_nodelist *ndlp = rdata->pnode;

628
	if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
已提交
629 630 631 632 633 634 635 636
		return 0;
	}

	psli = &phba->sli;
	piocbq = &(lpfc_cmd->cur_iocbq);
	piocb = &piocbq->iocb;

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
637 638
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
	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;
	}

	return (1);
}

static int
664 665
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
		    unsigned  tgt_id, struct lpfc_rport_data *rdata)
已提交
666 667
{
	struct lpfc_iocbq *iocbq;
668
	struct lpfc_iocbq *iocbqrsp;
已提交
669 670
	int ret;

671
	lpfc_cmd->rdata = rdata;
已提交
672 673 674 675 676 677
	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;
678 679
	iocbqrsp = lpfc_sli_get_iocbq(phba);

已提交
680 681 682
	if (!iocbqrsp)
		return FAILED;

683 684 685 686 687 688 689
	/* 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, tgt_id, rdata->pnode->nlp_rpi,
			rdata->pnode->nlp_flag);

690 691 692
	ret = lpfc_sli_issue_iocb_wait(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
693 694 695 696 697 698 699 700 701 702 703 704
	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;
	}

705
	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
706 707 708 709 710 711
	return ret;
}

const char *
lpfc_info(struct Scsi_Host *host)
{
712
	struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
已提交
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
	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;
}

737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767
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 (phba->sli.ring[LPFC_FCP_RING].txcmplq_cnt)
		mod_timer(&phba->fcp_poll_timer,
			  poll_tmo_expires);
}

void lpfc_poll_start_timer(struct lpfc_hba * phba)
{
	lpfc_poll_rearm_timer(phba);
}

void lpfc_poll_timeout(unsigned long ptr)
{
	struct lpfc_hba *phba = (struct lpfc_hba *)ptr;
	unsigned long iflag;

	spin_lock_irqsave(phba->host->host_lock, iflag);

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring (phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

	spin_unlock_irqrestore(phba->host->host_lock, iflag);
}

已提交
768 769 770 771
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
	struct lpfc_hba *phba =
772
		(struct lpfc_hba *) cmnd->device->host->hostdata;
已提交
773 774 775
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *ndlp = rdata->pnode;
776
	struct lpfc_scsi_buf *lpfc_cmd;
777 778
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
779

780 781 782
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
783 784 785 786
		goto out_fail_command;
	}

	/*
787 788
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
789
	 */
790 791 792
	if (!ndlp) {
		cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
		goto out_fail_command;
已提交
793
	}
794
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
795
	if (lpfc_cmd == NULL) {
796 797 798
		lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
				"%d:0707 driver's buffer pool is empty, "
				"IO busied\n", phba->brd_no);
已提交
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821
		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;
822 823 824 825 826 827 828

	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
829 830 831
	return 0;

 out_host_busy_free_buf:
832
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
833
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
834 835 836 837 838 839 840 841
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

842

已提交
843
static int
844
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
845
{
846
	struct Scsi_Host *shost = cmnd->device->host;
847
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
848
	struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
849 850
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
851 852 853
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
	unsigned int loop_count = 0;
854
	int ret = SUCCESS;
已提交
855

856
	spin_lock_irq(shost->host_lock);
已提交
857

858 859
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	BUG_ON(!lpfc_cmd);
已提交
860

861 862 863 864 865 866 867 868 869 870
	/*
	 * If pCmd field of the corresponding lpfc_scsi_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.
	 */
	iocb = &lpfc_cmd->cur_iocbq;
	if (lpfc_cmd->pCmd != cmnd)
		goto out;
已提交
871

872
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
873

874 875 876
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
877 878 879 880
		goto out;
	}

	/*
881 882 883
	 * The scsi command can not be in txq and it is in flight because the
	 * pCmd is still pointig at the SCSI command we have to abort. There
	 * is no need to search the txcmplq. Just send an abort to the FW.
已提交
884 885
	 */

886 887 888 889 890
	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;
已提交
891

892 893 894 895 896 897
	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;
已提交
898

899 900 901 902 903 904
	abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
	if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
		lpfc_sli_release_iocbq(phba, abtsiocb);
		ret = FAILED;
		goto out;
	}
已提交
905

906 907 908
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
		lpfc_sli_poll_fcp_ring (phba);

909 910 911
	/* Wait for abort to complete */
	while (lpfc_cmd->pCmd == cmnd)
	{
912 913 914
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_sli_poll_fcp_ring (phba);

915
		spin_unlock_irq(phba->host->host_lock);
916
			schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
917 918 919 920 921
		spin_lock_irq(phba->host->host_lock);
		if (++loop_count
		    > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
			break;
	}
已提交
922

923 924 925 926 927 928 929 930
	if (lpfc_cmd->pCmd == cmnd) {
		ret = FAILED;
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
				"%d:0748 abort handler timed out waiting for "
				"abort to complete: ret %#x, ID %d, LUN %d, "
				"snum %#lx\n",
				phba->brd_no,  ret, cmnd->device->id,
				cmnd->device->lun, cmnd->serial_number);
已提交
931 932 933 934
	}

 out:
	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
935 936
			"%d:0749 SCSI Layer I/O Abort Request "
			"Status x%x ID %d LUN %d snum %#lx\n",
937 938
			phba->brd_no, ret, cmnd->device->id,
			cmnd->device->lun, cmnd->serial_number);
已提交
939

940
	spin_unlock_irq(shost->host_lock);
已提交
941

942
	return ret;
943 944
}

已提交
945
static int
946
lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
已提交
947 948
{
	struct Scsi_Host *shost = cmnd->device->host;
949
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
950 951
	struct lpfc_scsi_buf *lpfc_cmd;
	struct lpfc_iocbq *iocbq, *iocbqrsp;
已提交
952 953
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
954
	uint32_t cmd_result = 0, cmd_status = 0;
已提交
955 956 957
	int ret = FAILED;
	int cnt, loopcnt;

958
	spin_lock_irq(shost->host_lock);
已提交
959 960 961 962 963 964 965 966 967 968
	/*
	 * 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);
969
			schedule_timeout_uninterruptible(msecs_to_jiffies(500));
已提交
970 971 972 973 974 975
			spin_lock_irq(phba->host->host_lock);
		}
		if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
			break;
	}

976
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
977 978 979 980 981 982
	if (lpfc_cmd == NULL)
		goto out;

	lpfc_cmd->pCmd = cmnd;
	lpfc_cmd->timeout = 60;
	lpfc_cmd->scsi_hba = phba;
983
	lpfc_cmd->rdata = rdata;
已提交
984 985 986 987 988 989 990 991

	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 */
992
	iocbqrsp = lpfc_sli_get_iocbq(phba);
已提交
993 994 995
	if (iocbqrsp == NULL)
		goto out_free_scsi_buf;

996 997 998 999 1000
	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, cmnd->device->id,
			cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);

1001 1002 1003
	ret = lpfc_sli_issue_iocb_wait(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
1004 1005 1006
	if (ret == IOCB_SUCCESS)
		ret = SUCCESS;

1007 1008 1009 1010 1011 1012

	cmd_result = iocbqrsp->iocb.un.ulpWord[4];
	cmd_status = iocbqrsp->iocb.ulpStatus;

	lpfc_sli_release_iocbq(phba, iocbqrsp);
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
1013 1014

	/*
1015
	 * All outstanding txcmplq I/Os should have been aborted by the device.
已提交
1016 1017 1018
	 * Unfortunately, some targets do not abide by this forcing the driver
	 * to double check.
	 */
1019 1020 1021 1022 1023 1024 1025 1026
	cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				cmnd->device->id, cmnd->device->lun,
				LPFC_CTX_LUN);
	if (cnt)
		lpfc_sli_abort_iocb(phba,
				    &phba->sli.ring[phba->sli.fcp_ring],
				    cmnd->device->id, cmnd->device->lun,
				    0, LPFC_CTX_LUN);
已提交
1027
	loopcnt = 0;
1028
	while(cnt) {
已提交
1029
		spin_unlock_irq(phba->host->host_lock);
1030
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1031 1032 1033 1034 1035
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
			break;
1036 1037 1038 1039 1040

		cnt = lpfc_sli_sum_iocb(phba,
					&phba->sli.ring[phba->sli.fcp_ring],
					cmnd->device->id, cmnd->device->lun,
					LPFC_CTX_LUN);
已提交
1041 1042 1043
	}

	if (cnt) {
1044
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1045 1046
			"%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
			phba->brd_no, cnt);
1047
		ret = FAILED;
已提交
1048 1049 1050 1051 1052 1053
	}

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",
1054 1055 1056
			phba->brd_no, cmnd->device->id,cmnd->device->lun,
			ret, cmd_status, cmd_result);

已提交
1057
out:
1058
	spin_unlock_irq(shost->host_lock);
已提交
1059 1060 1061
	return ret;
}

1062
static int
1063
lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
已提交
1064 1065
{
	struct Scsi_Host *shost = cmnd->device->host;
1066
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
1067 1068 1069 1070
	struct lpfc_nodelist *ndlp = NULL;
	int match;
	int ret = FAILED, i, err_count = 0;
	int cnt, loopcnt;
1071
	struct lpfc_scsi_buf * lpfc_cmd;
已提交
1072

1073 1074
	spin_lock_irq(shost->host_lock);

1075
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
	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.
	 */
1089
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
已提交
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
		/* 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;

1101 1102
		ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba,
					  i, ndlp->rport->dd_data);
已提交
1103
		if (ret != SUCCESS) {
1104
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1105 1106 1107 1108 1109 1110
				"%d:0713 Bus Reset on target %d failed\n",
				phba->brd_no, i);
			err_count++;
		}
	}

1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125
	if (err_count == 0)
		ret = SUCCESS;

	lpfc_release_scsi_buf(phba, lpfc_cmd);

	/*
	 * All outstanding txcmplq I/Os should have been aborted by
	 * the targets.  Unfortunately, some targets do not abide by
	 * this forcing the driver to double check.
	 */
	cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				0, 0, LPFC_CTX_HOST);
	if (cnt)
		lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
				    0, 0, 0, LPFC_CTX_HOST);
已提交
1126
	loopcnt = 0;
1127
	while(cnt) {
已提交
1128
		spin_unlock_irq(phba->host->host_lock);
1129
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1130 1131 1132 1133 1134
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
		    > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
			break;
1135 1136 1137 1138

		cnt = lpfc_sli_sum_iocb(phba,
					&phba->sli.ring[phba->sli.fcp_ring],
					0, 0, LPFC_CTX_HOST);
已提交
1139 1140 1141
	}

	if (cnt) {
1142
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1143 1144
		   "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
		   phba->brd_no, cnt, i);
1145
		ret = FAILED;
1146
	}
已提交
1147 1148 1149 1150 1151 1152 1153

	lpfc_printf_log(phba,
			KERN_ERR,
			LOG_FCP,
			"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
			phba->brd_no, ret);
out:
1154
	spin_unlock_irq(shost->host_lock);
已提交
1155 1156 1157 1158 1159 1160
	return ret;
}

static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
1161
	struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
已提交
1162
	struct lpfc_scsi_buf *scsi_buf = NULL;
1163
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
已提交
1164 1165 1166 1167
	uint32_t total = 0, i;
	uint32_t num_to_alloc = 0;
	unsigned long flags;

1168
	if (!rport || fc_remote_port_chkready(rport))
已提交
1169 1170
		return -ENXIO;

1171
	sdev->hostdata = rport->dd_data;
已提交
1172 1173 1174 1175

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
1176 1177 1178
	 * 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.
已提交
1179 1180
	 */
	total = phba->total_scsi_bufs;
1181
	num_to_alloc = phba->cfg_lun_queue_depth + 2;
已提交
1182
	if (total >= phba->cfg_hba_queue_depth) {
1183 1184 1185
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0704 At limitation of %d preallocated "
				"command buffers\n", phba->brd_no, total);
已提交
1186 1187
		return 0;
	} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1188 1189 1190 1191 1192 1193
		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
				"%d:0705 Allocation request of %d command "
				"buffers will exceed max of %d.  Reducing "
				"allocation request to %d.\n", phba->brd_no,
				num_to_alloc, phba->cfg_hba_queue_depth,
				(phba->cfg_hba_queue_depth - total));
已提交
1194 1195 1196 1197
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}

	for (i = 0; i < num_to_alloc; i++) {
1198
		scsi_buf = lpfc_new_scsi_buf(phba);
已提交
1199
		if (!scsi_buf) {
1200 1201 1202
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"%d:0706 Failed to allocate command "
					"buffer\n", phba->brd_no);
已提交
1203 1204 1205
			break;
		}

1206
		spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
已提交
1207 1208
		phba->total_scsi_bufs++;
		list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1209
		spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
已提交
1210 1211 1212 1213 1214 1215 1216
	}
	return 0;
}

static int
lpfc_slave_configure(struct scsi_device *sdev)
{
1217
	struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
已提交
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232
	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;

1233 1234 1235 1236 1237 1238
	if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
		lpfc_sli_poll_fcp_ring(phba);
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_poll_rearm_timer(phba);
	}

已提交
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
	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,
1265
	.max_sectors		= 0xFFFF,
已提交
1266
};