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linux-stable-rt/drivers/scsi/lpfc/lpfc_scsi.c

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/*******************************************************************
* 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 = 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;
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
*/
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) {
if (pnode->nlp_state != NLP_STE_MAPPED_NODE)
cmd->result = ScsiResult(DID_BUS_BUSY,
SAM_STAT_BUSY);
}
else {
cmd->result = ScsiResult(DID_NO_CONNECT, 0);
}
} 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;
lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 == 0) || (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;
lpfc_put_lun(lpfc_cmd->fcp_cmnd, lpfc_cmd->pCmd->device->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 list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
int err = 0;
/*
* The target pointer is guaranteed not to be NULL because the driver
* only clears the device->hostdata field in lpfc_slave_destroy. This
* approach guarantees no further IO calls on this target.
*/
if (!ndlp) {
cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
goto out_fail_command;
}
/*
* A Fibre Channel target is present and functioning only when the node
* state is MAPPED. Any other state is a failure.
*/
if (ndlp->nlp_state != NLP_STE_MAPPED_NODE) {
if ((ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) ||
(ndlp->nlp_state == NLP_STE_UNUSED_NODE)) {
cmnd->result = ScsiResult(DID_NO_CONNECT, 0);
goto out_fail_command;
}
/*
* The device is most likely recovered and the driver
* needs a bit more time to finish. Ask the midlayer
* to retry.
*/
goto out_host_busy;
}
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;
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_nodelist *ndlp = NULL;
int match = 0;
struct lpfc_scsi_buf *scsi_buf = NULL;
uint32_t total = 0, i;
uint32_t num_to_alloc = 0;
unsigned long flags;
struct list_head *listp;
struct list_head *node_list[6];
/*
* Store the target pointer in the scsi_device hostdata pointer provided
* the driver has already discovered the target id.
*/
/* Search the nlp lists other than unmap_list for this target ID */
node_list[0] = &phba->fc_npr_list;
node_list[1] = &phba->fc_nlpmap_list;
node_list[2] = &phba->fc_prli_list;
node_list[3] = &phba->fc_reglogin_list;
node_list[4] = &phba->fc_adisc_list;
node_list[5] = &phba->fc_plogi_list;
for (i = 0; i < 6 && !match; i++) {
listp = node_list[i];
if (list_empty(listp))
continue;
list_for_each_entry(ndlp, listp, nlp_listp) {
if ((sdev->id == ndlp->nlp_sid) && ndlp->rport) {
match = 1;
break;
}
}
}
if (!match)
return -ENXIO;
sdev->hostdata = ndlp->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,
};
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