/******************************************************************* * 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 #include #include #include #include #include #include #include #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; int status; if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode)) return FAILED; lpfc_cmd->rdata = rdata; status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, lun, FCP_TARGET_RESET); if (!status) return FAILED; iocbq = &lpfc_cmd->cur_iocbq; iocbqrsp = lpfc_sli_get_iocbq(phba); if (!iocbqrsp) return FAILED; /* Issue Target Reset to TGT */ 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); status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (status != IOCB_SUCCESS) { if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; ret = TIMEOUT_ERROR; } else ret = FAILED; 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; unsigned long later; int ret = SUCCESS; int status; int cnt; lpfc_block_error_handler(cmnd); /* * If target is not in a MAPPED state, delay the reset until * target is rediscovered or devloss timeout expires. */ later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies)) { if (!pnode || !NLP_CHK_NODE_ACT(pnode)) return FAILED; if (pnode->nlp_state == NLP_STE_MAPPED_NODE) break; schedule_timeout_uninterruptible(msecs_to_jiffies(500)); rdata = cmnd->device->hostdata; if (!rdata) break; pnode = rdata->pnode; } if (!rdata || pnode->nlp_state != NLP_STE_MAPPED_NODE) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0721 LUN Reset rport " "failure: msec x%x rdata x%p\n", jiffies_to_msecs(jiffies - later), rdata); return FAILED; } lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd == NULL) return FAILED; lpfc_cmd->timeout = 60; lpfc_cmd->rdata = rdata; status = lpfc_scsi_prep_task_mgmt_cmd(vport, lpfc_cmd, cmnd->device->lun, FCP_TARGET_RESET); if (!status) { lpfc_release_scsi_buf(phba, lpfc_cmd); return FAILED; } iocbq = &lpfc_cmd->cur_iocbq; /* get a buffer for this IOCB command response */ iocbqrsp = lpfc_sli_get_iocbq(phba); if (iocbqrsp == NULL) { lpfc_release_scsi_buf(phba, lpfc_cmd); return FAILED; } 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); status = lpfc_sli_issue_iocb_wait(phba, &phba->sli.ring[phba->sli.fcp_ring], iocbq, iocbqrsp, lpfc_cmd->timeout); if (status == IOCB_TIMEDOUT) { iocbq->iocb_cmpl = lpfc_tskmgmt_def_cmpl; ret = TIMEOUT_ERROR; } else { if (status != IOCB_SUCCESS) ret = FAILED; 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, iocbqrsp->iocb.ulpStatus, iocbqrsp->iocb.un.ulpWord[4]); lpfc_sli_release_iocbq(phba, iocbqrsp); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); if (cnt) lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring], cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies) && cnt) { schedule_timeout_uninterruptible(msecs_to_jiffies(20)); cnt = lpfc_sli_sum_iocb(vport, cmnd->device->id, cmnd->device->lun, LPFC_CTX_TGT); } if (cnt) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0719 device reset I/O flush failure: " "cnt x%x\n", cnt); ret = FAILED; } 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 = SUCCESS, status, i; int cnt; struct lpfc_scsi_buf * lpfc_cmd; unsigned long later; lpfc_block_error_handler(cmnd); /* * 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 && ndlp->nlp_sid == i && ndlp->rport) { match = 1; break; } } spin_unlock_irq(shost->host_lock); if (!match) continue; lpfc_cmd = lpfc_get_scsi_buf(phba); if (lpfc_cmd) { lpfc_cmd->timeout = 60; status = lpfc_scsi_tgt_reset(lpfc_cmd, vport, i, cmnd->device->lun, ndlp->rport->dd_data); if (status != TIMEOUT_ERROR) lpfc_release_scsi_buf(phba, lpfc_cmd); } if (!lpfc_cmd || status != SUCCESS) { lpfc_printf_vlog(vport, KERN_ERR, LOG_FCP, "0700 Bus Reset on target %d failed\n", i); 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); later = msecs_to_jiffies(2 * vport->cfg_devloss_tmo * 1000) + jiffies; while (time_after(later, jiffies) && cnt) { schedule_timeout_uninterruptible(msecs_to_jiffies(20)); 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); 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, };