lpfc_scsi.c 38.4 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>
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#include <linux/delay.h>
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#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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	if (lpfc_cmd) {
		lpfc_cmd->seg_cnt = 0;
		lpfc_cmd->nonsg_phys = 0;
	}
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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
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lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_iocbq *rsp_iocb)
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{
	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;
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	uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
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	uint32_t resp_info = fcprsp->rspStatus2;
	uint32_t scsi_status = fcprsp->rspStatus3;
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	uint32_t *lp;
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	uint32_t host_status = DID_OK;
	uint32_t rsplen = 0;
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	uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
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	/*
	 *  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;
	}

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	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;

	if (!scsi_status && (resp_info & RESID_UNDER))
		logit = LOG_FCP;

	lpfc_printf_log(phba, KERN_WARNING, logit,
			"%d:0730 FCP command x%x failed: x%x SNS x%x x%x "
			"Data: x%x x%x x%x x%x x%x\n",
			phba->brd_no, cmnd->cmnd[0], scsi_status,
			be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
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			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;
		}
	}

	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);

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		/*
		 * 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 ((cmnd->sc_data_direction == DMA_FROM_DEVICE) &&
			fcpi_parm &&
			(cmnd->resid != fcpi_parm)) {
			lpfc_printf_log(phba, KERN_WARNING,
				LOG_FCP | LOG_FCP_ERROR,
				"%d:0735 FCP Read Check Error and Underrun "
				"Data: x%x x%x x%x x%x\n", phba->brd_no,
				be32_to_cpu(fcpcmd->fcpDl),
				cmnd->resid,
				fcpi_parm, cmnd->cmnd[0]);
			cmnd->resid = cmnd->request_bufflen;
			host_status = DID_ERROR;
		}
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		/*
		 * 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)) {
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		lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
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			"%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 */
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			lpfc_handle_fcp_err(lpfc_cmd,pIocbOut);
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			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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	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
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	cmd->scsi_done(cmd);

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

499
	if (!result && pnode != NULL &&
500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526
	   ((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.
	 */
527
	if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551
		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);
		}
	}

552
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
553 554 555 556 557 558 559 560 561 562 563 564 565
}

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;
566 567
	/* clear task management bits */
	lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
已提交
568

569 570
	int_to_scsilun(lpfc_cmd->pCmd->device->lun,
			&lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649

	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,
650
			     unsigned int lun,
已提交
651 652 653 654 655 656
			     uint8_t task_mgmt_cmd)
{
	struct lpfc_sli *psli;
	struct lpfc_iocbq *piocbq;
	IOCB_t *piocb;
	struct fcp_cmnd *fcp_cmnd;
657
	struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
已提交
658 659
	struct lpfc_nodelist *ndlp = rdata->pnode;

660
	if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
已提交
661 662 663 664 665 666 667 668
		return 0;
	}

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

	fcp_cmnd = lpfc_cmd->fcp_cmnd;
669
	int_to_scsilun(lun, &lpfc_cmd->fcp_cmnd->fcp_lun);
已提交
670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693
	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);
}

694 695 696 697 698 699 700 701 702 703 704 705
static void
lpfc_tskmgmt_def_cmpl(struct lpfc_hba *phba,
			struct lpfc_iocbq *cmdiocbq,
			struct lpfc_iocbq *rspiocbq)
{
	struct lpfc_scsi_buf *lpfc_cmd =
		(struct lpfc_scsi_buf *) cmdiocbq->context1;
	if (lpfc_cmd)
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	return;
}

已提交
706
static int
707
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba,
708 709
		    unsigned  tgt_id, unsigned int lun,
		    struct lpfc_rport_data *rdata)
已提交
710 711
{
	struct lpfc_iocbq *iocbq;
712
	struct lpfc_iocbq *iocbqrsp;
已提交
713 714
	int ret;

J
James Smart 已提交
715 716 717
	if (!rdata->pnode)
		return FAILED;

718
	lpfc_cmd->rdata = rdata;
719 720
	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun,
					   FCP_TARGET_RESET);
已提交
721 722 723 724 725
	if (!ret)
		return FAILED;

	lpfc_cmd->scsi_hba = phba;
	iocbq = &lpfc_cmd->cur_iocbq;
726 727
	iocbqrsp = lpfc_sli_get_iocbq(phba);

已提交
728 729 730
	if (!iocbqrsp)
		return FAILED;

731 732 733 734 735 736 737
	/* 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);

738 739 740
	ret = lpfc_sli_issue_iocb_wait(phba,
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
741
	if (ret != IOCB_SUCCESS) {
742 743
		if (ret == IOCB_TIMEDOUT)
			iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
已提交
744 745 746 747 748 749 750 751 752 753
		lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
	} 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;
	}

754
	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
755 756 757 758 759 760
	return ret;
}

const char *
lpfc_info(struct Scsi_Host *host)
{
761
	struct lpfc_hba    *phba = (struct lpfc_hba *) host->hostdata;
已提交
762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
	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;
}

786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816
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
817 818 819 820
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
	struct lpfc_hba *phba =
821
		(struct lpfc_hba *) cmnd->device->host->hostdata;
已提交
822 823 824
	struct lpfc_sli *psli = &phba->sli;
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *ndlp = rdata->pnode;
825
	struct lpfc_scsi_buf *lpfc_cmd;
826 827
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
	int err;
已提交
828

829 830 831
	err = fc_remote_port_chkready(rport);
	if (err) {
		cmnd->result = err;
已提交
832 833 834 835
		goto out_fail_command;
	}

	/*
836 837
	 * Catch race where our node has transitioned, but the
	 * transport is still transitioning.
已提交
838
	 */
839 840 841
	if (!ndlp) {
		cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
		goto out_fail_command;
已提交
842
	}
843
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
844
	if (lpfc_cmd == NULL) {
845 846 847
		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
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870
		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;
871 872 873 874 875 876 877

	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
878 879 880
	return 0;

 out_host_busy_free_buf:
881
	lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
882
	lpfc_release_scsi_buf(phba, lpfc_cmd);
已提交
883 884 885 886 887 888 889 890
 out_host_busy:
	return SCSI_MLQUEUE_HOST_BUSY;

 out_fail_command:
	done(cmnd);
	return 0;
}

891 892 893 894 895 896 897 898 899 900 901 902 903 904 905
static void
lpfc_block_error_handler(struct scsi_cmnd *cmnd)
{
	struct Scsi_Host *shost = cmnd->device->host;
	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));

	spin_lock_irq(shost->host_lock);
	while (rport->port_state == FC_PORTSTATE_BLOCKED) {
		spin_unlock_irq(shost->host_lock);
		msleep(1000);
		spin_lock_irq(shost->host_lock);
	}
	spin_unlock_irq(shost->host_lock);
	return;
}
906

已提交
907
static int
908
lpfc_abort_handler(struct scsi_cmnd *cmnd)
已提交
909
{
910
	struct Scsi_Host *shost = cmnd->device->host;
911
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
912
	struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
913 914
	struct lpfc_iocbq *iocb;
	struct lpfc_iocbq *abtsiocb;
已提交
915 916 917
	struct lpfc_scsi_buf *lpfc_cmd;
	IOCB_t *cmd, *icmd;
	unsigned int loop_count = 0;
918
	int ret = SUCCESS;
已提交
919

920
	lpfc_block_error_handler(cmnd);
921
	spin_lock_irq(shost->host_lock);
已提交
922

923 924
	lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
	BUG_ON(!lpfc_cmd);
已提交
925

926 927 928 929 930 931 932 933 934 935
	/*
	 * 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
936

937
	BUG_ON(iocb->context1 != lpfc_cmd);
已提交
938

939 940 941
	abtsiocb = lpfc_sli_get_iocbq(phba);
	if (abtsiocb == NULL) {
		ret = FAILED;
已提交
942 943 944 945
		goto out;
	}

	/*
946 947 948
	 * 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
949 950
	 */

951 952 953 954 955
	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
956

957 958 959 960 961 962
	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
963

964 965 966 967 968 969
	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
970

971 972 973
	if (phba->cfg_poll & DISABLE_FCP_RING_INT)
		lpfc_sli_poll_fcp_ring (phba);

974 975 976
	/* Wait for abort to complete */
	while (lpfc_cmd->pCmd == cmnd)
	{
977 978 979
		if (phba->cfg_poll & DISABLE_FCP_RING_INT)
			lpfc_sli_poll_fcp_ring (phba);

980
		spin_unlock_irq(phba->host->host_lock);
981
			schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ);
982 983
		spin_lock_irq(phba->host->host_lock);
		if (++loop_count
984
		    > (2 * phba->cfg_devloss_tmo)/LPFC_ABORT_WAIT)
985 986
			break;
	}
已提交
987

988 989 990 991 992 993 994 995
	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
996 997 998 999
	}

 out:
	lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
1000 1001
			"%d:0749 SCSI Layer I/O Abort Request "
			"Status x%x ID %d LUN %d snum %#lx\n",
1002 1003
			phba->brd_no, ret, cmnd->device->id,
			cmnd->device->lun, cmnd->serial_number);
已提交
1004

1005
	spin_unlock_irq(shost->host_lock);
已提交
1006

1007
	return ret;
1008 1009
}

已提交
1010
static int
1011
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
已提交
1012 1013
{
	struct Scsi_Host *shost = cmnd->device->host;
1014
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
1015 1016
	struct lpfc_scsi_buf *lpfc_cmd;
	struct lpfc_iocbq *iocbq, *iocbqrsp;
已提交
1017 1018
	struct lpfc_rport_data *rdata = cmnd->device->hostdata;
	struct lpfc_nodelist *pnode = rdata->pnode;
1019
	uint32_t cmd_result = 0, cmd_status = 0;
已提交
1020
	int ret = FAILED;
1021
	int iocb_status = IOCB_SUCCESS;
已提交
1022 1023
	int cnt, loopcnt;

1024
	lpfc_block_error_handler(cmnd);
1025
	spin_lock_irq(shost->host_lock);
J
James Smart 已提交
1026
	loopcnt = 0;
已提交
1027 1028
	/*
	 * If target is not in a MAPPED state, delay the reset until
1029
	 * target is rediscovered or devloss timeout expires.
已提交
1030 1031 1032
	 */
	while ( 1 ) {
		if (!pnode)
1033
			goto out;
已提交
1034 1035 1036

		if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
			spin_unlock_irq(phba->host->host_lock);
1037
			schedule_timeout_uninterruptible(msecs_to_jiffies(500));
已提交
1038
			spin_lock_irq(phba->host->host_lock);
J
James Smart 已提交
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
			loopcnt++;
			rdata = cmnd->device->hostdata;
			if (!rdata ||
				(loopcnt > ((phba->cfg_devloss_tmo * 2) + 1))) {
				lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
		   			"%d:0721 LUN Reset rport failure:"
					" cnt x%x rdata x%p\n",
		   			phba->brd_no, loopcnt, rdata);
				goto out;
			}
			pnode = rdata->pnode;
			if (!pnode)
1051
				goto out;
已提交
1052
		}
J
James Smart 已提交
1053
		if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
已提交
1054 1055 1056
			break;
	}

1057
	lpfc_cmd = lpfc_get_scsi_buf (phba);
已提交
1058 1059 1060 1061 1062
	if (lpfc_cmd == NULL)
		goto out;

	lpfc_cmd->timeout = 60;
	lpfc_cmd->scsi_hba = phba;
1063
	lpfc_cmd->rdata = rdata;
已提交
1064

1065
	ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun,
1066
					   FCP_TARGET_RESET);
已提交
1067 1068 1069 1070 1071 1072
	if (!ret)
		goto out_free_scsi_buf;

	iocbq = &lpfc_cmd->cur_iocbq;

	/* get a buffer for this IOCB command response */
1073
	iocbqrsp = lpfc_sli_get_iocbq(phba);
已提交
1074 1075 1076
	if (iocbqrsp == NULL)
		goto out_free_scsi_buf;

1077
	lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
1078 1079
			"%d:0703 Issue target reset to TGT %d LUN %d rpi x%x "
			"nlp_flag x%x\n", phba->brd_no, cmnd->device->id,
1080 1081
			cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);

1082
	iocb_status = lpfc_sli_issue_iocb_wait(phba,
1083 1084
				       &phba->sli.ring[phba->sli.fcp_ring],
				       iocbq, iocbqrsp, lpfc_cmd->timeout);
已提交
1085

1086 1087 1088 1089 1090 1091 1092
	if (iocb_status == IOCB_TIMEDOUT)
		iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;

	if (iocb_status == IOCB_SUCCESS)
		ret = SUCCESS;
	else
		ret = iocb_status;
1093 1094 1095 1096 1097

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

	lpfc_sli_release_iocbq(phba, iocbqrsp);
已提交
1098 1099

	/*
1100
	 * All outstanding txcmplq I/Os should have been aborted by the device.
已提交
1101 1102 1103
	 * Unfortunately, some targets do not abide by this forcing the driver
	 * to double check.
	 */
1104 1105 1106 1107 1108 1109 1110 1111
	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
1112
	loopcnt = 0;
1113
	while(cnt) {
已提交
1114
		spin_unlock_irq(phba->host->host_lock);
1115
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1116 1117 1118
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
1119
		    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
已提交
1120
			break;
1121 1122 1123 1124 1125

		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
1126 1127 1128
	}

	if (cnt) {
1129
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1130
			"%d:0719 device reset I/O flush failure: cnt x%x\n",
已提交
1131
			phba->brd_no, cnt);
1132
		ret = FAILED;
已提交
1133 1134 1135
	}

out_free_scsi_buf:
1136 1137 1138
	if (iocb_status != IOCB_TIMEDOUT) {
		lpfc_release_scsi_buf(phba, lpfc_cmd);
	}
已提交
1139
	lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1140 1141 1142
			"%d:0713 SCSI layer issued device reset (%d, %d) "
			"return x%x status x%x result x%x\n",
			phba->brd_no, cmnd->device->id, cmnd->device->lun,
1143 1144
			ret, cmd_status, cmd_result);

已提交
1145
out:
1146
	spin_unlock_irq(shost->host_lock);
已提交
1147 1148 1149
	return ret;
}

1150
static int
1151
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
已提交
1152 1153
{
	struct Scsi_Host *shost = cmnd->device->host;
1154
	struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata;
已提交
1155 1156 1157 1158
	struct lpfc_nodelist *ndlp = NULL;
	int match;
	int ret = FAILED, i, err_count = 0;
	int cnt, loopcnt;
1159
	struct lpfc_scsi_buf * lpfc_cmd;
已提交
1160

1161
	lpfc_block_error_handler(cmnd);
1162 1163
	spin_lock_irq(shost->host_lock);

1164
	lpfc_cmd = lpfc_get_scsi_buf(phba);
已提交
1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
	if (lpfc_cmd == NULL)
		goto out;

	/* The lpfc_cmd storage is reused.  Set all loop invariants. */
	lpfc_cmd->timeout = 60;
	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.
	 */
1177
	for (i = 0; i < LPFC_MAX_TARGET; i++) {
已提交
1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
		/* 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;

1189 1190
		ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun,
					  ndlp->rport->dd_data);
已提交
1191
		if (ret != SUCCESS) {
1192
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
1193
				"%d:0700 Bus Reset on target %d failed\n",
已提交
1194 1195
				phba->brd_no, i);
			err_count++;
1196
			break;
已提交
1197 1198 1199
		}
	}

1200 1201 1202
	if (ret != IOCB_TIMEDOUT)
		lpfc_release_scsi_buf(phba, lpfc_cmd);

1203 1204
	if (err_count == 0)
		ret = SUCCESS;
1205 1206
	else
		ret = FAILED;
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217

	/*
	 * 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
1218
	loopcnt = 0;
1219
	while(cnt) {
已提交
1220
		spin_unlock_irq(phba->host->host_lock);
1221
		schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
已提交
1222 1223 1224
		spin_lock_irq(phba->host->host_lock);

		if (++loopcnt
1225
		    > (2 * phba->cfg_devloss_tmo)/LPFC_RESET_WAIT)
已提交
1226
			break;
1227 1228 1229 1230

		cnt = lpfc_sli_sum_iocb(phba,
					&phba->sli.ring[phba->sli.fcp_ring],
					0, 0, LPFC_CTX_HOST);
已提交
1231 1232 1233
	}

	if (cnt) {
1234
		lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
已提交
1235 1236
		   "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
		   phba->brd_no, cnt, i);
1237
		ret = FAILED;
1238
	}
已提交
1239 1240 1241 1242 1243 1244 1245

	lpfc_printf_log(phba,
			KERN_ERR,
			LOG_FCP,
			"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
			phba->brd_no, ret);
out:
1246
	spin_unlock_irq(shost->host_lock);
已提交
1247 1248 1249 1250 1251 1252
	return ret;
}

static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
1253
	struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata;
已提交
1254
	struct lpfc_scsi_buf *scsi_buf = NULL;
1255
	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
已提交
1256 1257 1258 1259
	uint32_t total = 0, i;
	uint32_t num_to_alloc = 0;
	unsigned long flags;

1260
	if (!rport || fc_remote_port_chkready(rport))
已提交
1261 1262
		return -ENXIO;

1263
	sdev->hostdata = rport->dd_data;
已提交
1264 1265 1266 1267

	/*
	 * Populate the cmds_per_lun count scsi_bufs into this host's globally
	 * available list of scsi buffers.  Don't allocate more than the
1268 1269 1270
	 * 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
1271 1272
	 */
	total = phba->total_scsi_bufs;
1273
	num_to_alloc = phba->cfg_lun_queue_depth + 2;
已提交
1274
	if (total >= phba->cfg_hba_queue_depth) {
1275 1276 1277
		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
1278 1279
		return 0;
	} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
1280 1281 1282 1283 1284 1285
		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
1286 1287 1288 1289
		num_to_alloc = phba->cfg_hba_queue_depth - total;
	}

	for (i = 0; i < num_to_alloc; i++) {
1290
		scsi_buf = lpfc_new_scsi_buf(phba);
已提交
1291
		if (!scsi_buf) {
1292 1293 1294
			lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
					"%d:0706 Failed to allocate command "
					"buffer\n", phba->brd_no);
已提交
1295 1296 1297
			break;
		}

1298
		spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
已提交
1299 1300
		phba->total_scsi_bufs++;
		list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
1301
		spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
已提交
1302 1303 1304 1305 1306 1307 1308
	}
	return 0;
}

static int
lpfc_slave_configure(struct scsi_device *sdev)
{
1309
	struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata;
已提交
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
	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.
	 */
1323
	rport->dev_loss_tmo = phba->cfg_devloss_tmo;
已提交
1324

1325 1326 1327 1328 1329 1330
	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
1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346
	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,
1347 1348
	.eh_device_reset_handler= lpfc_device_reset_handler,
	.eh_bus_reset_handler	= lpfc_bus_reset_handler,
已提交
1349 1350 1351 1352 1353 1354 1355 1356
	.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,
1357
	.max_sectors		= 0xFFFF,
已提交
1358
};