--- /dev/null
+/*******************************************************************
+ * 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_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;
+}
+
+/*
+ * 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_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,
+};
git://git.onelab.eu / linux-2.6.git / blobdiff