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linux/drivers/scsi/lpfc/lpfc_scsi.c

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/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
* Copyright (C) 2004-2008 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 <linux/delay.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"
#include "lpfc_vport.h"
#define LPFC_RESET_WAIT 2
#define LPFC_ABORT_WAIT 2
/*
* This function is called with no lock held when there is a resource
* error in driver or in firmware.
*/
void
lpfc_adjust_queue_depth(struct lpfc_hba *phba)
{
unsigned long flags;
spin_lock_irqsave(&phba->hbalock, flags);
atomic_inc(&phba->num_rsrc_err);
phba->last_rsrc_error_time = jiffies;
if ((phba->last_ramp_down_time + QUEUE_RAMP_DOWN_INTERVAL) > jiffies) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
phba->last_ramp_down_time = jiffies;
spin_unlock_irqrestore(&phba->hbalock, flags);
spin_lock_irqsave(&phba->pport->work_port_lock, flags);
if ((phba->pport->work_port_events &
WORKER_RAMP_DOWN_QUEUE) == 0) {
phba->pport->work_port_events |= WORKER_RAMP_DOWN_QUEUE;
}
spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
spin_lock_irqsave(&phba->hbalock, flags);
if (phba->work_wait)
wake_up(phba->work_wait);
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
/*
* This function is called with no lock held when there is a successful
* SCSI command completion.
*/
static inline void
lpfc_rampup_queue_depth(struct lpfc_vport *vport,
struct scsi_device *sdev)
{
unsigned long flags;
struct lpfc_hba *phba = vport->phba;
atomic_inc(&phba->num_cmd_success);
if (vport->cfg_lun_queue_depth <= sdev->queue_depth)
return;
spin_lock_irqsave(&phba->hbalock, flags);
if (((phba->last_ramp_up_time + QUEUE_RAMP_UP_INTERVAL) > jiffies) ||
((phba->last_rsrc_error_time + QUEUE_RAMP_UP_INTERVAL ) > jiffies)) {
spin_unlock_irqrestore(&phba->hbalock, flags);
return;
}
phba->last_ramp_up_time = jiffies;
spin_unlock_irqrestore(&phba->hbalock, flags);
spin_lock_irqsave(&phba->pport->work_port_lock, flags);
if ((phba->pport->work_port_events &
WORKER_RAMP_UP_QUEUE) == 0) {
phba->pport->work_port_events |= WORKER_RAMP_UP_QUEUE;
}
spin_unlock_irqrestore(&phba->pport->work_port_lock, flags);
spin_lock_irqsave(&phba->hbalock, flags);
if (phba->work_wait)
wake_up(phba->work_wait);
spin_unlock_irqrestore(&phba->hbalock, flags);
}
void
lpfc_ramp_down_queue_handler(struct lpfc_hba *phba)
{
struct lpfc_vport **vports;
struct Scsi_Host *shost;
struct scsi_device *sdev;
unsigned long new_queue_depth;
unsigned long num_rsrc_err, num_cmd_success;
int i;
num_rsrc_err = atomic_read(&phba->num_rsrc_err);
num_cmd_success = atomic_read(&phba->num_cmd_success);
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
shost = lpfc_shost_from_vport(vports[i]);
shost_for_each_device(sdev, shost) {
new_queue_depth =
sdev->queue_depth * num_rsrc_err /
(num_rsrc_err + num_cmd_success);
if (!new_queue_depth)
new_queue_depth = sdev->queue_depth - 1;
else
new_queue_depth = sdev->queue_depth -
new_queue_depth;
if (sdev->ordered_tags)
scsi_adjust_queue_depth(sdev,
MSG_ORDERED_TAG,
new_queue_depth);
else
scsi_adjust_queue_depth(sdev,
MSG_SIMPLE_TAG,
new_queue_depth);
}
}
lpfc_destroy_vport_work_array(phba, vports);
atomic_set(&phba->num_rsrc_err, 0);
atomic_set(&phba->num_cmd_success, 0);
}
void
lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
{
struct lpfc_vport **vports;
struct Scsi_Host *shost;
struct scsi_device *sdev;
int i;
vports = lpfc_create_vport_work_array(phba);
if (vports != NULL)
for(i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
shost = lpfc_shost_from_vport(vports[i]);
shost_for_each_device(sdev, shost) {
if (vports[i]->cfg_lun_queue_depth <=
sdev->queue_depth)
continue;
if (sdev->ordered_tags)
scsi_adjust_queue_depth(sdev,
MSG_ORDERED_TAG,
sdev->queue_depth+1);
else
scsi_adjust_queue_depth(sdev,
MSG_SIMPLE_TAG,
sdev->queue_depth+1);
}
}
lpfc_destroy_vport_work_array(phba, vports);
atomic_set(&phba->num_rsrc_err, 0);
atomic_set(&phba->num_cmd_success, 0);
}
/*
* 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_new_scsi_buf(struct lpfc_vport *vport)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *psb;
struct ulp_bde64 *bpl;
IOCB_t *iocb;
dma_addr_t pdma_phys;
uint16_t iotag;
psb = kzalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
if (!psb)
return NULL;
/*
* 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);
/* 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;
}
psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
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 struct lpfc_scsi_buf*
lpfc_get_scsi_buf(struct lpfc_hba * phba)
{
struct lpfc_scsi_buf * lpfc_cmd = NULL;
struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
unsigned long iflag = 0;
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
if (lpfc_cmd) {
lpfc_cmd->seg_cnt = 0;
lpfc_cmd->nonsg_phys = 0;
}
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
return lpfc_cmd;
}
static void
lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
{
unsigned long iflag = 0;
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
psb->pCmd = NULL;
list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
}
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 nseg, datadir = scsi_cmnd->sc_data_direction;
/*
* 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_sg_count(scsi_cmnd)) {
/*
* 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.
*/
nseg = dma_map_sg(&phba->pcidev->dev, scsi_sglist(scsi_cmnd),
scsi_sg_count(scsi_cmnd), datadir);
if (unlikely(!nseg))
return 1;
lpfc_cmd->seg_cnt = nseg;
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);
scsi_dma_unmap(scsi_cmnd);
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.
*/
scsi_for_each_sg(scsi_cmnd, sgel, nseg, 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++;
num_bde++;
}
}
/*
* 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 = cpu_to_be32(scsi_bufflen(scsi_cmnd));
return 0;
}
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)
scsi_dma_unmap(psb->pCmd);
}
static void
lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
struct lpfc_iocbq *rsp_iocb)
{
struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
uint32_t fcpi_parm = rsp_iocb->iocb.un.fcpi.fcpi_parm;
uint32_t resp_info = fcprsp->rspStatus2;
uint32_t scsi_status = fcprsp->rspStatus3;
uint32_t *lp;
uint32_t host_status = DID_OK;
uint32_t rsplen = 0;
uint32_t logit = LOG_FCP | LOG_FCP_ERROR;
/*
* 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;
}
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_vlog(vport, KERN_WARNING, logit,
"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",
cmnd->cmnd[0], scsi_status,
be32_to_cpu(*lp), be32_to_cpu(*(lp + 3)), resp_info,
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;
}
}
scsi_set_resid(cmnd, 0);
if (resp_info & RESID_UNDER) {
scsi_set_resid(cmnd, be32_to_cpu(fcprsp->rspResId));
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0716 FCP Read Underrun, expected %d, "
"residual %d Data: x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
scsi_get_resid(cmnd), fcpi_parm, cmnd->cmnd[0],
cmnd->underflow);
/*
* 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 &&
(scsi_get_resid(cmnd) != fcpi_parm)) {
lpfc_printf_vlog(vport, KERN_WARNING,
LOG_FCP | LOG_FCP_ERROR,
"0735 FCP Read Check Error "
"and Underrun Data: x%x x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
scsi_get_resid(cmnd), fcpi_parm,
cmnd->cmnd[0]);
scsi_set_resid(cmnd, scsi_bufflen(cmnd));
host_status = DID_ERROR;
}
/*
* 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) &&
(scsi_bufflen(cmnd) - scsi_get_resid(cmnd)
< cmnd->underflow)) {
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0717 FCP command x%x residual "
"underrun converted to error "
"Data: x%x x%x x%x\n",
cmnd->cmnd[0], scsi_bufflen(cmnd),
scsi_get_resid(cmnd), cmnd->underflow);
host_status = DID_ERROR;
}
} else if (resp_info & RESID_OVER) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0720 FCP command x%x residual overrun error. "
"Data: x%x x%x \n", cmnd->cmnd[0],
scsi_bufflen(cmnd), scsi_get_resid(cmnd));
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_vlog(vport, KERN_WARNING, LOG_FCP | LOG_FCP_ERROR,
"0734 FCP Read Check Error Data: "
"x%x x%x x%x x%x\n",
be32_to_cpu(fcpcmd->fcpDl),
be32_to_cpu(fcprsp->rspResId),
fcpi_parm, cmnd->cmnd[0]);
host_status = DID_ERROR;
scsi_set_resid(cmnd, scsi_bufflen(cmnd));
}
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_vport *vport = pIocbIn->vport;
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *pnode = rdata->pnode;
struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
int result;
struct scsi_device *sdev, *tmp_sdev;
int depth = 0;
unsigned long flags;
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_vlog(vport, KERN_WARNING, LOG_FCP,
"0729 FCP cmd x%x failed <%d/%d> "
"status: x%x result: x%x Data: x%x x%x\n",
cmd->cmnd[0],
cmd->device ? cmd->device->id : 0xffff,
cmd->device ? cmd->device->lun : 0xffff,
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(vport, lpfc_cmd, pIocbOut);
break;
case IOSTAT_NPORT_BSY:
case IOSTAT_FABRIC_BSY:
cmd->result = ScsiResult(DID_BUS_BUSY, 0);
break;
case IOSTAT_LOCAL_REJECT:
if (lpfc_cmd->result == RJT_UNAVAIL_PERM ||
lpfc_cmd->result == IOERR_NO_RESOURCES ||
lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
cmd->result = ScsiResult(DID_REQUEUE, 0);
break;
} /* else: fall through */
default:
cmd->result = ScsiResult(DID_ERROR, 0);
break;
}
if (!pnode || !NLP_CHK_NODE_ACT(pnode)
|| (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_vlog(vport, KERN_INFO, LOG_FCP,
"0710 Iodone <%d/%d> cmd %p, error "
"x%x SNS x%x x%x Data: x%x x%x\n",
cmd->device->id, cmd->device->lun, cmd,
cmd->result, *lp, *(lp + 3), cmd->retries,
scsi_get_resid(cmd));
}
result = cmd->result;
sdev = cmd->device;
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
spin_lock_irqsave(sdev->host->host_lock, flags);
lpfc_cmd->pCmd = NULL; /* This must be done before scsi_done */
spin_unlock_irqrestore(sdev->host->host_lock, flags);
cmd->scsi_done(cmd);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(sdev->host->host_lock, flags);
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(sdev->host->host_lock, flags);
lpfc_release_scsi_buf(phba, lpfc_cmd);
return;
}
if (!result)
lpfc_rampup_queue_depth(vport, sdev);
if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
((jiffies - pnode->last_ramp_up_time) >
LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
((jiffies - pnode->last_q_full_time) >
LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
(vport->cfg_lun_queue_depth > sdev->queue_depth)) {
shost_for_each_device(tmp_sdev, sdev->host) {
if (vport->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.
*/
if (result == SAM_STAT_TASK_SET_FULL && pnode &&
NLP_CHK_NODE_ACT(pnode)) {
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_vlog(vport, KERN_WARNING, LOG_FCP,
"0711 detected queue full - lun queue "
"depth adjusted to %d.\n", depth);
}
}
/*
* If there is a thread waiting for command completion
* wake up the thread.
*/
spin_lock_irqsave(sdev->host->host_lock, flags);
if (lpfc_cmd->waitq)
wake_up(lpfc_cmd->waitq);
spin_unlock_irqrestore(sdev->host->host_lock, flags);
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
static void
lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
struct lpfc_nodelist *pnode)
{
struct lpfc_hba *phba = vport->phba;
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;
char tag[2];
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
return;
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_populate_tag_msg(scsi_cmnd, tag)) {
switch (tag[0]) {
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_sg_count(scsi_cmnd)) {
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_bufflen(scsi_cmnd);
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;
else
piocbq->iocb.ulpFCP2Rcvy = 0;
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;
piocbq->vport = vport;
}
static int
lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_vport *vport,
struct lpfc_scsi_buf *lpfc_cmd,
unsigned int lun,
uint8_t task_mgmt_cmd)
{
struct lpfc_iocbq *piocbq;
IOCB_t *piocb;
struct fcp_cmnd *fcp_cmnd;
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
ndlp->nlp_state != NLP_STE_MAPPED_NODE)
return 0;
piocbq = &(lpfc_cmd->cur_iocbq);
piocbq->vport = vport;
piocb = &piocbq->iocb;
fcp_cmnd = lpfc_cmd->fcp_cmnd;
int_to_scsilun(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;
}
return 1;
}
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;
}
static int
lpfc_scsi_tgt_reset(struct lpfc_scsi_buf *lpfc_cmd, struct lpfc_vport *vport,
unsigned tgt_id, unsigned int lun,
struct lpfc_rport_data *rdata)
{
struct lpfc_hba *phba = vport->phba;
struct lpfc_iocbq *iocbq;
struct lpfc_iocbq *iocbqrsp;
int ret;
if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
return FAILED;
lpfc_cmd->rdata = rdata;
ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun,
FCP_TARGET_RESET);
if (!ret)
return FAILED;
iocbq = &lpfc_cmd->cur_iocbq;
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (!iocbqrsp)
return FAILED;
/* Issue Target Reset to TGT <num> */
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0702 Issue Target Reset to TGT %d Data: x%x x%x\n",
tgt_id, rdata->pnode->nlp_rpi, rdata->pnode->nlp_flag);
ret = lpfc_sli_issue_iocb_wait(phba,
&phba->sli.ring[phba->sli.fcp_ring],
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (ret != IOCB_SUCCESS) {
if (ret == IOCB_TIMEDOUT)
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
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;
}
lpfc_sli_release_iocbq(phba, iocbqrsp);
return ret;
}
const char *
lpfc_info(struct Scsi_Host *host)
{
struct lpfc_vport *vport = (struct lpfc_vport *) host->hostdata;
struct lpfc_hba *phba = vport->phba;
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 __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;
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);
}
}
static int
lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
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;
struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
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 || !NLP_CHK_NODE_ACT(ndlp)) {
cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
goto out_fail_command;
}
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL) {
lpfc_adjust_queue_depth(phba);
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0707 driver's buffer pool is empty, "
"IO busied\n");
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(vport, 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;
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);
}
return 0;
out_host_busy_free_buf:
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;
out_fail_command:
done(cmnd);
return 0;
}
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;
}
static int
lpfc_abort_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_sli_ring *pring = &phba->sli.ring[phba->sli.fcp_ring];
struct lpfc_iocbq *iocb;
struct lpfc_iocbq *abtsiocb;
struct lpfc_scsi_buf *lpfc_cmd;
IOCB_t *cmd, *icmd;
int ret = SUCCESS;
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(waitq);
lpfc_block_error_handler(cmnd);
lpfc_cmd = (struct lpfc_scsi_buf *)cmnd->host_scribble;
BUG_ON(!lpfc_cmd);
/*
* 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;
BUG_ON(iocb->context1 != lpfc_cmd);
abtsiocb = lpfc_sli_get_iocbq(phba);
if (abtsiocb == NULL) {
ret = FAILED;
goto out;
}
/*
* 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.
*/
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 (lpfc_is_link_up(phba))
icmd->ulpCommand = CMD_ABORT_XRI_CN;
else
icmd->ulpCommand = CMD_CLOSE_XRI_CN;
abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl;
abtsiocb->vport = vport;
if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) {
lpfc_sli_release_iocbq(phba, abtsiocb);
ret = FAILED;
goto out;
}
if (phba->cfg_poll & DISABLE_FCP_RING_INT)
lpfc_sli_poll_fcp_ring (phba);
lpfc_cmd->waitq = &waitq;
/* Wait for abort to complete */
wait_event_timeout(waitq,
(lpfc_cmd->pCmd != cmnd),
(2*vport->cfg_devloss_tmo*HZ));
spin_lock_irq(shost->host_lock);
lpfc_cmd->waitq = NULL;
spin_unlock_irq(shost->host_lock);
if (lpfc_cmd->pCmd == cmnd) {
ret = FAILED;
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0748 abort handler timed out waiting "
"for abort to complete: ret %#x, ID %d, "
"LUN %d, snum %#lx\n",
ret, cmnd->device->id, cmnd->device->lun,
cmnd->serial_number);
}
out:
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0749 SCSI Layer I/O Abort Request Status x%x ID %d "
"LUN %d snum %#lx\n", ret, cmnd->device->id,
cmnd->device->lun, cmnd->serial_number);
return ret;
}
static int
lpfc_device_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_scsi_buf *lpfc_cmd;
struct lpfc_iocbq *iocbq, *iocbqrsp;
struct lpfc_rport_data *rdata = cmnd->device->hostdata;
struct lpfc_nodelist *pnode = rdata->pnode;
uint32_t cmd_result = 0, cmd_status = 0;
int ret = FAILED;
int iocb_status = IOCB_SUCCESS;
int cnt, loopcnt;
lpfc_block_error_handler(cmnd);
loopcnt = 0;
/*
* If target is not in a MAPPED state, delay the reset until
* target is rediscovered or devloss timeout expires.
*/
while (1) {
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
goto out;
if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
schedule_timeout_uninterruptible(msecs_to_jiffies(500));
loopcnt++;
rdata = cmnd->device->hostdata;
if (!rdata ||
(loopcnt > ((vport->cfg_devloss_tmo * 2) + 1))){
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0721 LUN Reset rport "
"failure: cnt x%x rdata x%p\n",
loopcnt, rdata);
goto out;
}
pnode = rdata->pnode;
if (!pnode || !NLP_CHK_NODE_ACT(pnode))
goto out;
}
if (pnode->nlp_state == NLP_STE_MAPPED_NODE)
break;
}
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL)
goto out;
lpfc_cmd->timeout = 60;
lpfc_cmd->rdata = rdata;
ret = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun,
FCP_TARGET_RESET);
if (!ret)
goto out_free_scsi_buf;
iocbq = &lpfc_cmd->cur_iocbq;
/* get a buffer for this IOCB command response */
iocbqrsp = lpfc_sli_get_iocbq(phba);
if (iocbqrsp == NULL)
goto out_free_scsi_buf;
lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP,
"0703 Issue target reset to TGT %d LUN %d "
"rpi x%x nlp_flag x%x\n", cmnd->device->id,
cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag);
iocb_status = lpfc_sli_issue_iocb_wait(phba,
&phba->sli.ring[phba->sli.fcp_ring],
iocbq, iocbqrsp, lpfc_cmd->timeout);
if (iocb_status == IOCB_TIMEDOUT)
iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl;
if (iocb_status == IOCB_SUCCESS)
ret = SUCCESS;
else
ret = iocb_status;
cmd_result = iocbqrsp->iocb.un.ulpWord[4];
cmd_status = iocbqrsp->iocb.ulpStatus;
lpfc_sli_release_iocbq(phba, iocbqrsp);
/*
* All outstanding txcmplq I/Os should have been aborted by the device.
* Unfortunately, some targets do not abide by this forcing the driver
* to double check.
*/
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun,
LPFC_CTX_LUN);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
cmnd->device->id, cmnd->device->lun,
LPFC_CTX_LUN);
loopcnt = 0;
while(cnt) {
schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
if (++loopcnt
> (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
break;
cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id,
cmnd->device->lun, LPFC_CTX_LUN);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0719 device reset I/O flush failure: "
"cnt x%x\n", cnt);
ret = FAILED;
}
out_free_scsi_buf:
if (iocb_status != IOCB_TIMEDOUT) {
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0713 SCSI layer issued device reset (%d, %d) "
"return x%x status x%x result x%x\n",
cmnd->device->id, cmnd->device->lun, ret,
cmd_status, cmd_result);
out:
return ret;
}
static int
lpfc_bus_reset_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
struct lpfc_hba *phba = vport->phba;
struct lpfc_nodelist *ndlp = NULL;
int match;
int ret = FAILED, i, err_count = 0;
int cnt, loopcnt;
struct lpfc_scsi_buf * lpfc_cmd;
lpfc_block_error_handler(cmnd);
lpfc_cmd = lpfc_get_scsi_buf(phba);
if (lpfc_cmd == NULL)
goto out;
/* The lpfc_cmd storage is reused. Set all loop invariants. */
lpfc_cmd->timeout = 60;
/*
* 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.
*/
for (i = 0; i < LPFC_MAX_TARGET; i++) {
/* Search for mapped node by target ID */
match = 0;
spin_lock_irq(shost->host_lock);
list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) {
if (!NLP_CHK_NODE_ACT(ndlp))
continue;
if (ndlp->nlp_state == NLP_STE_MAPPED_NODE &&
i == ndlp->nlp_sid &&
ndlp->rport) {
match = 1;
break;
}
}
spin_unlock_irq(shost->host_lock);
if (!match)
continue;
ret = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i,
cmnd->device->lun,
ndlp->rport->dd_data);
if (ret != SUCCESS) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0700 Bus Reset on target %d failed\n",
i);
err_count++;
break;
}
}
if (ret != IOCB_TIMEDOUT)
lpfc_release_scsi_buf(phba, lpfc_cmd);
if (err_count == 0)
ret = SUCCESS;
else
ret = FAILED;
/*
* 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(vport, 0, 0, LPFC_CTX_HOST);
if (cnt)
lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
0, 0, LPFC_CTX_HOST);
loopcnt = 0;
while(cnt) {
schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ);
if (++loopcnt
> (2 * vport->cfg_devloss_tmo)/LPFC_RESET_WAIT)
break;
cnt = lpfc_sli_sum_iocb(vport, 0, 0, LPFC_CTX_HOST);
}
if (cnt) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0715 Bus Reset I/O flush failure: "
"cnt x%x left x%x\n", cnt, i);
ret = FAILED;
}
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0714 SCSI layer issued Bus Reset Data: x%x\n", ret);
out:
return ret;
}
static int
lpfc_slave_alloc(struct scsi_device *sdev)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
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. The
* formula accounts for the lun_queue_depth + error handlers + 1
* extra. This list of scsi bufs exists for the lifetime of the driver.
*/
total = phba->total_scsi_bufs;
num_to_alloc = vport->cfg_lun_queue_depth + 2;
/* Allow some exchanges to be available always to complete discovery */
if (total >= phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0704 At limitation of %d preallocated "
"command buffers\n", total);
return 0;
/* Allow some exchanges to be available always to complete discovery */
} else if (total + num_to_alloc >
phba->cfg_hba_queue_depth - LPFC_DISC_IOCB_BUFF_COUNT ) {
lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
"0705 Allocation request of %d "
"command buffers will exceed max of %d. "
"Reducing allocation request to %d.\n",
num_to_alloc, phba->cfg_hba_queue_depth,
(phba->cfg_hba_queue_depth - total));
num_to_alloc = phba->cfg_hba_queue_depth - total;
}
for (i = 0; i < num_to_alloc; i++) {
scsi_buf = lpfc_new_scsi_buf(vport);
if (!scsi_buf) {
lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP,
"0706 Failed to allocate "
"command buffer\n");
break;
}
spin_lock_irqsave(&phba->scsi_buf_list_lock, flags);
phba->total_scsi_bufs++;
list_add_tail(&scsi_buf->list, &phba->lpfc_scsi_buf_list);
spin_unlock_irqrestore(&phba->scsi_buf_list_lock, flags);
}
return 0;
}
static int
lpfc_slave_configure(struct scsi_device *sdev)
{
struct lpfc_vport *vport = (struct lpfc_vport *) sdev->host->hostdata;
struct lpfc_hba *phba = vport->phba;
struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
if (sdev->tagged_supported)
scsi_activate_tcq(sdev, vport->cfg_lun_queue_depth);
else
scsi_deactivate_tcq(sdev, vport->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 = vport->cfg_devloss_tmo;
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);
}
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_device_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_hba_attrs,
.max_sectors = 0xFFFF,
};
struct scsi_host_template lpfc_vport_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_device_reset_handler,
.eh_bus_reset_handler = lpfc_bus_reset_handler,
.slave_alloc = lpfc_slave_alloc,
.slave_configure = lpfc_slave_configure,
.slave_destroy = lpfc_slave_destroy,
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_DEFAULT_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_vport_attrs,
.max_sectors = 0xFFFF,
};
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