/*******************************************************************
* 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