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19a7b4aebf
linux-next/drivers/scsi/lpfc/lpfc_scsi.c
James.Smart@Emulex.Com 19a7b4aebf [SCSI] update fc_transport for removal of block/unblock functions 
We recently went back to implement a board reset. When we perform the
reset, we wanted to tear down the internal data structures and rebuild
them. Unfortunately, when it came to the rport structure, things were
odd. If we deleted them, the scsi targets and sdevs would be
torn down. Not a good thing for a temporary reset. We could block the
rports, but we either maintain the internal structures to keep the
rport reference (perhaps even replicating what's in the transport),
or we have to fatten the fc transport with new search routines to find
the rport (and deal with a case of a dangling rport that the driver
forgets).

It dawned on me that we had actually reached this state incorrectly.
When the fc transport first started, we did the block/unblock first, then
added the rport interface. The purpose of block/unblock is to hide the
temporary disappearance of the rport (e.g. being deleted, then readded).
Why are we making the driver do the block/unblock ? We should be making
the transport have only an rport add/delete, and the let the transport
handle the block/unblock.

So... This patch removes the existing fc_remote_port_block/unblock
functions. It moves the block/unblock functionality into the
fc_remote_port_add/delete functions.  Updates for the lpfc driver are
included. Qlogic driver updates are also enclosed, thanks to the
contributions of Andrew Vasquez. [Note: the qla2xxx changes are
relative to the scsi-misc-2.6 tree as of this morning - which does
not include the recent patches sent by Andrew]. The zfcp driver does
not use the block/unblock functions.

One last comment: The resulting behavior feels very clean. The LLDD is
concerned only with add/delete, which corresponds to the physical
disappearance.  However, the fact that the scsi target and sdevs are
not immediately torn down after the LLDD calls delete causes an
interesting scenario... the midlayer can call the xxx_slave_alloc and
xxx_queuecommand functions with a sdev that is at the location the
rport used to be. The driver must validate the device exists when it
first enters these functions. In thinking about it, this has always
been the case for the LLDD and these routines. The existing drivers
already check for existence. However, this highlights that simple
validation via data structure dereferencing needs to be watched.
To deal with this, a new transport function, fc_remote_port_chkready()
was created that LLDDs should call when they first enter these two
routines. It validates the rport state, and returns a scsi result
which could be returned. In addition to solving the above, it also
creates consistent behavior from the LLDD's when the block and deletes
are occuring.

Rejections fixed up and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
2005-10-28 21:20:07 -05:00

1235 lines
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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2005 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* Portions Copyright (C) 2004-2005 Christoph Hellwig *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of version 2 of the GNU General *
* Public License as published by the Free Software Foundation. *
* This program is distributed in the hope that it will be useful. *
* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
* TO BE LEGALLY INVALID. See the GNU General Public License for *
* more details, a copy of which can be found in the file COPYING *
* included with this package. *
*******************************************************************/
#include <linux/pci.h>
#include <linux/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 *
lpfc_get_scsi_buf(struct lpfc_hba * phba)
{
struct lpfc_scsi_buf *psb;
struct ulp_bde64 *bpl;
IOCB_t *iocb;
dma_addr_t pdma_phys;
psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
if (!psb)
return NULL;
memset(psb, 0, sizeof (struct lpfc_scsi_buf));
psb->scsi_hba = phba;
/*
* Get memory from the pci pool to map the virt space to pci bus space
* for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
* struct fcp_rsp and the number of bde's necessary to support the
* sg_tablesize.
*/
psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
&psb->dma_handle);
if (!psb->data) {
kfree(psb);
return NULL;
}
/* Initialize virtual ptrs to dma_buf region. */
memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
psb->fcp_cmnd = psb->data;
psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
sizeof(struct fcp_rsp);
/* Initialize local short-hand pointers. */
bpl = psb->fcp_bpl;
pdma_phys = psb->dma_handle;
/*
* The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
* list bdes. Initialize the first two and leave the rest for
* queuecommand.
*/
bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
bpl->tus.f.bdeFlags = BUFF_USE_CMND;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
bpl++;
/* Setup the physical region for the FCP RSP */
pdma_phys += sizeof (struct fcp_cmnd);
bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
bpl->tus.w = le32_to_cpu(bpl->tus.w);
/*
* Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
* initialize it with all known data now.
*/
pdma_phys += (sizeof (struct fcp_rsp));
iocb = &psb->cur_iocbq.iocb;
iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
iocb->ulpBdeCount = 1;
iocb->ulpClass = CLASS3;
return psb;
}
static void
lpfc_free_scsi_buf(struct lpfc_scsi_buf * psb)
{
struct lpfc_hba *phba = psb->scsi_hba;
/*
* There are only two special cases to consider. (1) the scsi command
* requested scatter-gather usage or (2) the scsi command allocated
* a request buffer, but did not request use_sg. There is a third
* case, but it does not require resource deallocation.
*/
if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
psb->seg_cnt, psb->pCmd->sc_data_direction);
} else {
if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
psb->pCmd->request_bufflen,
psb->pCmd->sc_data_direction);
}
}
list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
}
static int
lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
{
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct scatterlist *sgel = NULL;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
dma_addr_t physaddr;
uint32_t i, num_bde = 0;
int datadir = scsi_cmnd->sc_data_direction;
int dma_error;
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither. Start the lpfc command prep by
* bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
* data bde entry.
*/
bpl += 2;
if (scsi_cmnd->use_sg) {
/*
* The driver stores the segment count returned from pci_map_sg
* because this a count of dma-mappings used to map the use_sg
* pages. They are not guaranteed to be the same for those
* architectures that implement an IOMMU.
*/
sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
scsi_cmnd->use_sg, datadir);
if (lpfc_cmd->seg_cnt == 0)
return 1;
if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
printk(KERN_ERR "%s: Too many sg segments from "
"dma_map_sg. Config %d, seg_cnt %d",
__FUNCTION__, phba->cfg_sg_seg_cnt,
lpfc_cmd->seg_cnt);
dma_unmap_sg(&phba->pcidev->dev, sgel,
lpfc_cmd->seg_cnt, datadir);
return 1;
}
/*
* The driver established a maximum scatter-gather segment count
* during probe that limits the number of sg elements in any
* single scsi command. Just run through the seg_cnt and format
* the bde's.
*/
for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
physaddr = sg_dma_address(sgel);
bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
bpl->tus.f.bdeSize = sg_dma_len(sgel);
if (datadir == DMA_TO_DEVICE)
bpl->tus.f.bdeFlags = 0;
else
bpl->tus.f.bdeFlags = BUFF_USE_RCV;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
bpl++;
sgel++;
num_bde++;
}
} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
physaddr = dma_map_single(&phba->pcidev->dev,
scsi_cmnd->request_buffer,
scsi_cmnd->request_bufflen,
datadir);
dma_error = dma_mapping_error(physaddr);
if (dma_error) {
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"%d:0718 Unable to dma_map_single "
"request_buffer: x%x\n",
phba->brd_no, dma_error);
return 1;
}
lpfc_cmd->nonsg_phys = physaddr;
bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
if (datadir == DMA_TO_DEVICE)
bpl->tus.f.bdeFlags = 0;
else
bpl->tus.f.bdeFlags = BUFF_USE_RCV;
bpl->tus.w = le32_to_cpu(bpl->tus.w);
num_bde = 1;
bpl++;
}
/*
* Finish initializing those IOCB fields that are dependent on the
* scsi_cmnd request_buffer. Note that the bdeSize is explicitly
* reinitialized since all iocb memory resources are used many times
* for transmit, receive, and continuation bpl's.
*/
iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
iocb_cmd->un.fcpi64.bdl.bdeSize +=
(num_bde * sizeof (struct ulp_bde64));
iocb_cmd->ulpBdeCount = 1;
iocb_cmd->ulpLe = 1;
fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
return 0;
}
static void
lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
{
struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
uint32_t resp_info = fcprsp->rspStatus2;
uint32_t scsi_status = fcprsp->rspStatus3;
uint32_t host_status = DID_OK;
uint32_t rsplen = 0;
/*
* If this is a task management command, there is no
* scsi packet associated with this lpfc_cmd. The driver
* consumes it.
*/
if (fcpcmd->fcpCntl2) {
scsi_status = 0;
goto out;
}
lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
"%d:0730 FCP command failed: RSP "
"Data: x%x x%x x%x x%x x%x x%x\n",
phba->brd_no, resp_info, scsi_status,
be32_to_cpu(fcprsp->rspResId),
be32_to_cpu(fcprsp->rspSnsLen),
be32_to_cpu(fcprsp->rspRspLen),
fcprsp->rspInfo3);
if (resp_info & RSP_LEN_VALID) {
rsplen = be32_to_cpu(fcprsp->rspRspLen);
if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
(fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
host_status = DID_ERROR;
goto out;
}
}
if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
if (snslen > SCSI_SENSE_BUFFERSIZE)
snslen = SCSI_SENSE_BUFFERSIZE;
memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
}
cmnd->resid = 0;
if (resp_info & RESID_UNDER) {
cmnd->resid = be32_to_cpu(fcprsp->rspResId);
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0716 FCP Read Underrun, expected %d, "
"residual %d Data: x%x x%x x%x\n", phba->brd_no,
be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
/*
* The cmnd->underflow is the minimum number of bytes that must
* be transfered for this command. Provided a sense condition
* is not present, make sure the actual amount transferred is at
* least the underflow value or fail.
*/
if (!(resp_info & SNS_LEN_VALID) &&
(scsi_status == SAM_STAT_GOOD) &&
(cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0717 FCP command x%x residual "
"underrun converted to error "
"Data: x%x x%x x%x\n", phba->brd_no,
cmnd->cmnd[0], cmnd->request_bufflen,
cmnd->resid, cmnd->underflow);
host_status = DID_ERROR;
}
} else if (resp_info & RESID_OVER) {
lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
"%d:0720 FCP command x%x residual "
"overrun error. Data: x%x x%x \n",
phba->brd_no, cmnd->cmnd[0],
cmnd->request_bufflen, cmnd->resid);
host_status = DID_ERROR;
/*
* Check SLI validation that all the transfer was actually done
* (fcpi_parm should be zero). Apply check only to reads.
*/
} else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
"%d:0734 FCP Read Check Error Data: "
"x%x x%x x%x x%x\n", phba->brd_no,
be32_to_cpu(fcpcmd->fcpDl),
be32_to_cpu(fcprsp->rspResId),
fcpi_parm, cmnd->cmnd[0]);
host_status = DID_ERROR;
cmnd->resid = cmnd->request_bufflen;
}
out:
cmnd->result = ScsiResult(host_status, scsi_status);
}
static void
lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
struct lpfc_iocbq *pIocbOut)
{
struct lpfc_scsi_buf *lpfc_cmd =
(struct lpfc_scsi_buf *) pIocbIn->context1;
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *pnode = rdata->pnode;
struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
unsigned long iflag;
lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
if (lpfc_cmd->status) {
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
(lpfc_cmd->result & IOERR_DRVR_MASK))
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
else if (lpfc_cmd->status >= IOSTAT_CNT)
lpfc_cmd->status = IOSTAT_DEFAULT;
lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
"%d:0729 FCP cmd x%x failed <%d/%d> status: "
"x%x result: x%x Data: x%x x%x\n",
phba->brd_no, cmd->cmnd[0], cmd->device->id,
cmd->device->lun, lpfc_cmd->status,
lpfc_cmd->result, pIocbOut->iocb.ulpContext,
lpfc_cmd->cur_iocbq.iocb.ulpIoTag);
switch (lpfc_cmd->status) {
case IOSTAT_FCP_RSP_ERROR:
/* Call FCP RSP handler to determine result */
lpfc_handle_fcp_err(lpfc_cmd);
break;
case IOSTAT_NPORT_BSY:
case IOSTAT_FABRIC_BSY:
cmd->result = ScsiResult(DID_BUS_BUSY, 0);
break;
default:
cmd->result = ScsiResult(DID_ERROR, 0);
break;
}
if ((pnode == NULL )
|| (pnode->nlp_state != NLP_STE_MAPPED_NODE))
cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
} else {
cmd->result = ScsiResult(DID_OK, 0);
}
if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) {
uint32_t *lp = (uint32_t *)cmd->sense_buffer;
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0710 Iodone <%d/%d> cmd %p, error x%x "
"SNS x%x x%x Data: x%x x%x\n",
phba->brd_no, cmd->device->id,
cmd->device->lun, cmd, cmd->result,
*lp, *(lp + 3), cmd->retries, cmd->resid);
}
spin_lock_irqsave(phba->host->host_lock, iflag);
lpfc_free_scsi_buf(lpfc_cmd);
cmd->host_scribble = NULL;
spin_unlock_irqrestore(phba->host->host_lock, iflag);
cmd->scsi_done(cmd);
}
static void
lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd,
struct lpfc_nodelist *pnode)
{
struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq);
int datadir = scsi_cmnd->sc_data_direction;
lpfc_cmd->fcp_rsp->rspSnsLen = 0;
/* clear task management bits */
lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
int_to_scsilun(lpfc_cmd->pCmd->device->lun,
&lpfc_cmd->fcp_cmnd->fcp_lun);
memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16);
if (scsi_cmnd->device->tagged_supported) {
switch (scsi_cmnd->tag) {
case HEAD_OF_QUEUE_TAG:
fcp_cmnd->fcpCntl1 = HEAD_OF_Q;
break;
case ORDERED_QUEUE_TAG:
fcp_cmnd->fcpCntl1 = ORDERED_Q;
break;
default:
fcp_cmnd->fcpCntl1 = SIMPLE_Q;
break;
}
} else
fcp_cmnd->fcpCntl1 = 0;
/*
* There are three possibilities here - use scatter-gather segment, use
* the single mapping, or neither. Start the lpfc command prep by
* bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
* data bde entry.
*/
if (scsi_cmnd->use_sg) {
if (datadir == DMA_TO_DEVICE) {
iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
fcp_cmnd->fcpCntl3 = WRITE_DATA;
phba->fc4OutputRequests++;
} else {
iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
iocb_cmd->ulpPU = PARM_READ_CHECK;
iocb_cmd->un.fcpi.fcpi_parm =
scsi_cmnd->request_bufflen;
fcp_cmnd->fcpCntl3 = READ_DATA;
phba->fc4InputRequests++;
}
} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
if (datadir == DMA_TO_DEVICE) {
iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR;
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
fcp_cmnd->fcpCntl3 = WRITE_DATA;
phba->fc4OutputRequests++;
} else {
iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR;
iocb_cmd->ulpPU = PARM_READ_CHECK;
iocb_cmd->un.fcpi.fcpi_parm =
scsi_cmnd->request_bufflen;
fcp_cmnd->fcpCntl3 = READ_DATA;
phba->fc4InputRequests++;
}
} else {
iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR;
iocb_cmd->un.fcpi.fcpi_parm = 0;
iocb_cmd->ulpPU = 0;
fcp_cmnd->fcpCntl3 = 0;
phba->fc4ControlRequests++;
}
/*
* Finish initializing those IOCB fields that are independent
* of the scsi_cmnd request_buffer
*/
piocbq->iocb.ulpContext = pnode->nlp_rpi;
if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE)
piocbq->iocb.ulpFCP2Rcvy = 1;
piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f);
piocbq->context1 = lpfc_cmd;
piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl;
piocbq->iocb.ulpTimeout = lpfc_cmd->timeout;
}
static int
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba,
struct lpfc_scsi_buf *lpfc_cmd,
uint8_t task_mgmt_cmd)
{
struct lpfc_sli *psli;
struct lpfc_iocbq *piocbq;
IOCB_t *piocb;
struct fcp_cmnd *fcp_cmnd;
struct scsi_device *scsi_dev = lpfc_cmd->pCmd->device;
struct lpfc_rport_data *rdata = scsi_dev->hostdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
return 0;
}
psli = &phba->sli;
piocbq = &(lpfc_cmd->cur_iocbq);
piocb = &piocbq->iocb;
fcp_cmnd = lpfc_cmd->fcp_cmnd;
int_to_scsilun(lpfc_cmd->pCmd->device->lun,
&lpfc_cmd->fcp_cmnd->fcp_lun);
fcp_cmnd->fcpCntl2 = task_mgmt_cmd;
piocb->ulpCommand = CMD_FCP_ICMND64_CR;
piocb->ulpContext = ndlp->nlp_rpi;
if (ndlp->nlp_fcp_info & NLP_FCP_2_DEVICE) {
piocb->ulpFCP2Rcvy = 1;
}
piocb->ulpClass = (ndlp->nlp_fcp_info & 0x0f);
/* ulpTimeout is only one byte */
if (lpfc_cmd->timeout > 0xff) {
/*
* Do not timeout the command at the firmware level.
* The driver will provide the timeout mechanism.
*/
piocb->ulpTimeout = 0;
} else {
piocb->ulpTimeout = lpfc_cmd->timeout;
}
lpfc_cmd->rdata = rdata;
switch (task_mgmt_cmd) {
case FCP_LUN_RESET:
/* Issue LUN Reset to TGT <num> LUN <num> */
lpfc_printf_log(phba,
KERN_INFO,
LOG_FCP,
"%d:0703 Issue LUN Reset to TGT %d LUN %d "
"Data: x%x x%x\n",
phba->brd_no,
scsi_dev->id, scsi_dev->lun,
ndlp->nlp_rpi, ndlp->nlp_flag);
break;
case FCP_ABORT_TASK_SET:
/* Issue Abort Task Set to TGT <num> LUN <num> */
lpfc_printf_log(phba,
KERN_INFO,
LOG_FCP,
"%d:0701 Issue Abort Task Set to TGT %d LUN %d "
"Data: x%x x%x\n",
phba->brd_no,
scsi_dev->id, scsi_dev->lun,
ndlp->nlp_rpi, ndlp->nlp_flag);
break;
case FCP_TARGET_RESET:
/* Issue Target Reset to TGT <num> */
lpfc_printf_log(phba,
KERN_INFO,
LOG_FCP,
"%d:0702 Issue Target Reset to TGT %d "
"Data: x%x x%x\n",
phba->brd_no,
scsi_dev->id, ndlp->nlp_rpi,
ndlp->nlp_flag);
break;
}
return (1);
}
static int
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba)
{
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp = NULL;
struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
int ret;
ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_TARGET_RESET);
if (!ret)
return FAILED;
lpfc_cmd->scsi_hba = phba;
iocbq = &lpfc_cmd->cur_iocbq;
list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
if (!iocbqrsp)
return FAILED;
memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
iocbq->iocb_flag |= LPFC_IO_POLL;
ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
&phba->sli.ring[phba->sli.fcp_ring],
iocbq, SLI_IOCB_HIGH_PRIORITY,
iocbqrsp,
lpfc_cmd->timeout);
if (ret != IOCB_SUCCESS) {
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
ret = FAILED;
} else {
ret = SUCCESS;
lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT &&
(lpfc_cmd->result & IOERR_DRVR_MASK))
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
}
/*
* All outstanding txcmplq I/Os should have been aborted by the target.
* Unfortunately, some targets do not abide by this forcing the driver
* to double check.
*/
lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
lpfc_cmd->pCmd->device->id,
lpfc_cmd->pCmd->device->lun, 0, LPFC_CTX_TGT);
/* Return response IOCB to free list. */
list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
return ret;
}
static void
lpfc_scsi_cmd_iocb_cleanup (struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
struct lpfc_iocbq *pIocbOut)
{
unsigned long iflag;
struct lpfc_scsi_buf *lpfc_cmd =
(struct lpfc_scsi_buf *) pIocbIn->context1;
spin_lock_irqsave(phba->host->host_lock, iflag);
lpfc_free_scsi_buf(lpfc_cmd);
spin_unlock_irqrestore(phba->host->host_lock, iflag);
}
static void
lpfc_scsi_cmd_iocb_cmpl_aborted(struct lpfc_hba *phba,
struct lpfc_iocbq *pIocbIn,
struct lpfc_iocbq *pIocbOut)
{
struct scsi_cmnd *ml_cmd =
((struct lpfc_scsi_buf *) pIocbIn->context1)->pCmd;
lpfc_scsi_cmd_iocb_cleanup (phba, pIocbIn, pIocbOut);
ml_cmd->host_scribble = NULL;
}
const char *
lpfc_info(struct Scsi_Host *host)
{
struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata[0];
int len;
static char lpfcinfobuf[384];
memset(lpfcinfobuf,0,384);
if (phba && phba->pcidev){
strncpy(lpfcinfobuf, phba->ModelDesc, 256);
len = strlen(lpfcinfobuf);
snprintf(lpfcinfobuf + len,
384-len,
" on PCI bus %02x device %02x irq %d",
phba->pcidev->bus->number,
phba->pcidev->devfn,
phba->pcidev->irq);
len = strlen(lpfcinfobuf);
if (phba->Port[0]) {
snprintf(lpfcinfobuf + len,
384-len,
" port %s",
phba->Port);
}
}
return lpfcinfobuf;
}
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
struct lpfc_hba *phba =
(struct lpfc_hba *) cmnd->device->host->hostdata[0];
struct lpfc_sli *psli = &phba->sli;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
struct lpfc_scsi_buf *lpfc_cmd = NULL;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
int err;
err = fc_remote_port_chkready(rport);
if (err) {
cmnd->result = err;
goto out_fail_command;
}
/*
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
if (!ndlp) {
cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
goto out_fail_command;
}
list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
if (lpfc_cmd == NULL) {
printk(KERN_WARNING "%s: No buffer available - list empty, "
"total count %d\n", __FUNCTION__, phba->total_scsi_bufs);
goto out_host_busy;
}
/*
* Store the midlayer's command structure for the completion phase
* and complete the command initialization.
*/
lpfc_cmd->pCmd = cmnd;
lpfc_cmd->rdata = rdata;
lpfc_cmd->timeout = 0;
cmnd->host_scribble = (unsigned char *)lpfc_cmd;
cmnd->scsi_done = done;
err = lpfc_scsi_prep_dma_buf(phba, lpfc_cmd);
if (err)
goto out_host_busy_free_buf;
lpfc_scsi_prep_cmnd(phba, lpfc_cmd, ndlp);
err = lpfc_sli_issue_iocb(phba, &phba->sli.ring[psli->fcp_ring],
&lpfc_cmd->cur_iocbq, SLI_IOCB_RET_IOCB);
if (err)
goto out_host_busy_free_buf;
return 0;
out_host_busy_free_buf:
lpfc_free_scsi_buf(lpfc_cmd);
cmnd->host_scribble = NULL;
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
out_fail_command:
done(cmnd);
return 0;
}
static int
__lpfc_abort_handler(struct scsi_cmnd *cmnd)
{
struct lpfc_hba *phba =
(struct lpfc_hba *)cmnd->device->host->hostdata[0];
struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
struct lpfc_iocbq *iocb, *next_iocb;
struct lpfc_iocbq *abtsiocb = NULL;
struct lpfc_scsi_buf *lpfc_cmd;
struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
IOCB_t *cmd, *icmd;
unsigned long snum;
unsigned int id, lun;
unsigned int loop_count = 0;
int ret = IOCB_SUCCESS;
/*
* If the host_scribble data area is NULL, then the driver has already
* completed this command, but the midlayer did not see the completion
* before the eh fired. Just return SUCCESS.
*/
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
if (!lpfc_cmd)
return SUCCESS;
/* save these now since lpfc_cmd can be freed */
id = lpfc_cmd->pCmd->device->id;
lun = lpfc_cmd->pCmd->device->lun;
snum = lpfc_cmd->pCmd->serial_number;
list_for_each_entry_safe(iocb, next_iocb, &pring->txq, list) {
cmd = &iocb->iocb;
if (iocb->context1 != lpfc_cmd)
continue;
list_del_init(&iocb->list);
pring->txq_cnt--;
if (!iocb->iocb_cmpl) {
list_add_tail(&iocb->list, lpfc_iocb_list);
}
else {
cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
cmd->un.ulpWord[4] = IOERR_SLI_ABORTED;
lpfc_scsi_cmd_iocb_cmpl_aborted(phba, iocb, iocb);
}
goto out;
}
list_remove_head(lpfc_iocb_list, abtsiocb, struct lpfc_iocbq, list);
if (abtsiocb == NULL)
return FAILED;
memset(abtsiocb, 0, sizeof (struct lpfc_iocbq));
/*
* The scsi command was not in the txq. Check the txcmplq and if it is
* found, send an abort to the FW.
*/
list_for_each_entry_safe(iocb, next_iocb, &pring->txcmplq, list) {
if (iocb->context1 != lpfc_cmd)
continue;
iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl_aborted;
cmd = &iocb->iocb;
icmd = &abtsiocb->iocb;
icmd->un.acxri.abortType = ABORT_TYPE_ABTS;
icmd->un.acxri.abortContextTag = cmd->ulpContext;
icmd->un.acxri.abortIoTag = cmd->ulpIoTag;
icmd->ulpLe = 1;
icmd->ulpClass = cmd->ulpClass;
if (phba->hba_state >= LPFC_LINK_UP)
icmd->ulpCommand = CMD_ABORT_XRI_CN;
else
icmd->ulpCommand = CMD_CLOSE_XRI_CN;
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) ==
IOCB_ERROR) {
list_add_tail(&abtsiocb->list, lpfc_iocb_list);
ret = IOCB_ERROR;
break;
}
/* Wait for abort to complete */
while (cmnd->host_scribble)
{
spin_unlock_irq(phba->host->host_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(LPFC_ABORT_WAIT*HZ);
spin_lock_irq(phba->host->host_lock);
if (++loop_count
> (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT)
break;
}
if(cmnd->host_scribble) {
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"%d:0748 abort handler timed "
"out waiting for abort to "
"complete. Data: "
"x%x x%x x%x x%lx\n",
phba->brd_no, ret, id, lun, snum);
cmnd->host_scribble = NULL;
iocb->iocb_cmpl = lpfc_scsi_cmd_iocb_cleanup;
ret = IOCB_ERROR;
}
break;
}
out:
lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
"%d:0749 SCSI layer issued abort device "
"Data: x%x x%x x%x x%lx\n",
phba->brd_no, ret, id, lun, snum);
return ret == IOCB_SUCCESS ? SUCCESS : FAILED;
}
static int
lpfc_abort_handler(struct scsi_cmnd *cmnd)
{
int rc;
spin_lock_irq(cmnd->device->host->host_lock);
rc = __lpfc_abort_handler(cmnd);
spin_unlock_irq(cmnd->device->host->host_lock);
return rc;
}
static int
__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
struct lpfc_sli *psli = &phba->sli;
struct lpfc_scsi_buf *lpfc_cmd = NULL;
struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
struct list_head *lpfc_iocb_list = &phba->lpfc_iocb_list;
struct lpfc_iocbq *iocbq, *iocbqrsp = NULL;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
int ret = FAILED;
int cnt, loopcnt;
/*
* If target is not in a MAPPED state, delay the reset until
* target is rediscovered or nodev timeout expires.
*/
while ( 1 ) {
if (!pnode)
break;
if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
spin_unlock_irq(phba->host->host_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout( HZ/2);
spin_lock_irq(phba->host->host_lock);
}
if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE))
break;
}
list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
if (lpfc_cmd == NULL)
goto out;
lpfc_cmd->pCmd = cmnd;
lpfc_cmd->timeout = 60;
lpfc_cmd->scsi_hba = phba;
ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, FCP_LUN_RESET);
if (!ret)
goto out_free_scsi_buf;
iocbq = &lpfc_cmd->cur_iocbq;
/* get a buffer for this IOCB command response */
list_remove_head(lpfc_iocb_list, iocbqrsp, struct lpfc_iocbq, list);
if (iocbqrsp == NULL)
goto out_free_scsi_buf;
memset(iocbqrsp, 0, sizeof (struct lpfc_iocbq));
iocbq->iocb_flag |= LPFC_IO_POLL;
iocbq->iocb_cmpl = lpfc_sli_wake_iocb_high_priority;
ret = lpfc_sli_issue_iocb_wait_high_priority(phba,
&phba->sli.ring[psli->fcp_ring],
iocbq, 0, iocbqrsp, 60);
if (ret == IOCB_SUCCESS)
ret = SUCCESS;
lpfc_cmd->result = iocbqrsp->iocb.un.ulpWord[4];
lpfc_cmd->status = iocbqrsp->iocb.ulpStatus;
if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT)
if (lpfc_cmd->result & IOERR_DRVR_MASK)
lpfc_cmd->status = IOSTAT_DRIVER_REJECT;
/*
* All outstanding txcmplq I/Os should have been aborted by the target.
* Unfortunately, some targets do not abide by this forcing the driver
* to double check.
*/
lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring],
cmnd->device->id, cmnd->device->lun, 0,
LPFC_CTX_LUN);
loopcnt = 0;
while((cnt = lpfc_sli_sum_iocb(phba,
&phba->sli.ring[phba->sli.fcp_ring],
cmnd->device->id, cmnd->device->lun,
LPFC_CTX_LUN))) {
spin_unlock_irq(phba->host->host_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(LPFC_RESET_WAIT*HZ);
spin_lock_irq(phba->host->host_lock);
if (++loopcnt
> (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
break;
}
if (cnt) {
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0719 LUN Reset I/O flush failure: cnt x%x\n",
phba->brd_no, cnt);
}
list_add_tail(&iocbqrsp->list, lpfc_iocb_list);
out_free_scsi_buf:
lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
"%d:0713 SCSI layer issued LUN reset (%d, %d) "
"Data: x%x x%x x%x\n",
phba->brd_no, lpfc_cmd->pCmd->device->id,
lpfc_cmd->pCmd->device->lun, ret, lpfc_cmd->status,
lpfc_cmd->result);
lpfc_free_scsi_buf(lpfc_cmd);
out:
return ret;
}
static int
lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
{
int rc;
spin_lock_irq(cmnd->device->host->host_lock);
rc = __lpfc_reset_lun_handler(cmnd);
spin_unlock_irq(cmnd->device->host->host_lock);
return rc;
}
/*
* Note: midlayer calls this function with the host_lock held
*/
static int
__lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
struct lpfc_nodelist *ndlp = NULL;
int match;
int ret = FAILED, i, err_count = 0;
int cnt, loopcnt;
unsigned int midlayer_id = 0;
struct lpfc_scsi_buf * lpfc_cmd = NULL;
struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
if (lpfc_cmd == NULL)
goto out;
/* The lpfc_cmd storage is reused. Set all loop invariants. */
lpfc_cmd->timeout = 60;
lpfc_cmd->pCmd = cmnd;
lpfc_cmd->scsi_hba = phba;
/*
* Since the driver manages a single bus device, reset all
* targets known to the driver. Should any target reset
* fail, this routine returns failure to the midlayer.
*/
midlayer_id = cmnd->device->id;
for (i = 0; i < MAX_FCP_TARGET; i++) {
/* Search the mapped list for this target ID */
match = 0;
list_for_each_entry(ndlp, &phba->fc_nlpmap_list, nlp_listp) {
if ((i == ndlp->nlp_sid) && ndlp->rport) {
match = 1;
break;
}
}
if (!match)
continue;
lpfc_cmd->pCmd->device->id = i;
lpfc_cmd->pCmd->device->hostdata = ndlp->rport->dd_data;
ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba);
if (ret != SUCCESS) {
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0713 Bus Reset on target %d failed\n",
phba->brd_no, i);
err_count++;
}
}
cmnd->device->id = midlayer_id;
loopcnt = 0;
while((cnt = lpfc_sli_sum_iocb(phba,
&phba->sli.ring[phba->sli.fcp_ring],
0, 0, LPFC_CTX_HOST))) {
spin_unlock_irq(phba->host->host_lock);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(LPFC_RESET_WAIT*HZ);
spin_lock_irq(phba->host->host_lock);
if (++loopcnt
> (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT)
break;
}
if (cnt) {
/* flush all outstanding commands on the host */
i = lpfc_sli_abort_iocb(phba,
&phba->sli.ring[phba->sli.fcp_ring], 0, 0, 0,
LPFC_CTX_HOST);
lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
"%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n",
phba->brd_no, cnt, i);
}
if (!err_count)
ret = SUCCESS;
lpfc_free_scsi_buf(lpfc_cmd);
lpfc_printf_log(phba,
KERN_ERR,
LOG_FCP,
"%d:0714 SCSI layer issued Bus Reset Data: x%x\n",
phba->brd_no, ret);
out:
return ret;
}
static int
lpfc_reset_bus_handler(struct scsi_cmnd *cmnd)
{
int rc;
spin_lock_irq(cmnd->device->host->host_lock);
rc = __lpfc_reset_bus_handler(cmnd);
spin_unlock_irq(cmnd->device->host->host_lock);
return rc;
}
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata[0];
struct lpfc_scsi_buf *scsi_buf = NULL;
struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
uint32_t total = 0, i;
uint32_t num_to_alloc = 0;
unsigned long flags;
if (!rport || fc_remote_port_chkready(rport))
return -ENXIO;
sdev->hostdata = rport->dd_data;
/*
* Populate the cmds_per_lun count scsi_bufs into this host's globally
* available list of scsi buffers. Don't allocate more than the
* HBA limit conveyed to the midlayer via the host structure. Note
* that this list of scsi bufs exists for the lifetime of the driver.
*/
total = phba->total_scsi_bufs;
num_to_alloc = LPFC_CMD_PER_LUN;
if (total >= phba->cfg_hba_queue_depth) {
printk(KERN_WARNING "%s, At config limitation of "
"%d allocated scsi_bufs\n", __FUNCTION__, total);
return 0;
} else if (total + num_to_alloc > phba->cfg_hba_queue_depth) {
num_to_alloc = phba->cfg_hba_queue_depth - total;
}
for (i = 0; i < num_to_alloc; i++) {
scsi_buf = lpfc_get_scsi_buf(phba);
if (!scsi_buf) {
printk(KERN_ERR "%s, failed to allocate "
"scsi_buf\n", __FUNCTION__);
break;
}
spin_lock_irqsave(phba->host->host_lock, flags);
phba->total_scsi_bufs++;
list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(phba->host->host_lock, flags);
}
return 0;
}
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
struct lpfc_hba *phba = (struct lpfc_hba *) sdev->host->hostdata[0];
struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, phba->cfg_lun_queue_depth);
else
scsi_deactivate_tcq(sdev, phba->cfg_lun_queue_depth);
/*
* Initialize the fc transport attributes for the target
* containing this scsi device. Also note that the driver's
* target pointer is stored in the starget_data for the
* driver's sysfs entry point functions.
*/
rport->dev_loss_tmo = phba->cfg_nodev_tmo + 5;
return 0;
}
static void
lpfc_slave_destroy(struct scsi_device *sdev)
{
sdev->hostdata = NULL;
return;
}
struct scsi_host_template lpfc_template = {
.module = THIS_MODULE,
.name = LPFC_DRIVER_NAME,
.info = lpfc_info,
.queuecommand = lpfc_queuecommand,
.eh_abort_handler = lpfc_abort_handler,
.eh_device_reset_handler= lpfc_reset_lun_handler,
.eh_bus_reset_handler = lpfc_reset_bus_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.this_id = -1,
.sg_tablesize = LPFC_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_host_attrs,
.max_sectors = 0xFFFF,
};
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