| /******************************************************************* |
| * This file is part of the Emulex Linux Device Driver for * |
| * Fibre Channel Host Bus Adapters. * |
| * Copyright (C) 2004-2006 Emulex. All rights reserved. * |
| * EMULEX and SLI are trademarks of Emulex. * |
| * www.emulex.com * |
| * Portions Copyright (C) 2004-2005 Christoph Hellwig * |
| * * |
| * This program is free software; you can redistribute it and/or * |
| * modify it under the terms of version 2 of the GNU General * |
| * Public License as published by the Free Software Foundation. * |
| * This program is distributed in the hope that it will be useful. * |
| * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * |
| * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * |
| * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * |
| * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * |
| * TO BE LEGALLY INVALID. See the GNU General Public License for * |
| * more details, a copy of which can be found in the file COPYING * |
| * included with this package. * |
| *******************************************************************/ |
| |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_transport_fc.h> |
| |
| #include "lpfc_version.h" |
| #include "lpfc_hw.h" |
| #include "lpfc_sli.h" |
| #include "lpfc_disc.h" |
| #include "lpfc_scsi.h" |
| #include "lpfc.h" |
| #include "lpfc_logmsg.h" |
| #include "lpfc_crtn.h" |
| |
| #define LPFC_RESET_WAIT 2 |
| #define LPFC_ABORT_WAIT 2 |
| |
| |
| /* |
| * This routine allocates a scsi buffer, which contains all the necessary |
| * information needed to initiate a SCSI I/O. The non-DMAable buffer region |
| * contains information to build the IOCB. The DMAable region contains |
| * memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to |
| * allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL |
| * and the BPL BDE is setup in the IOCB. |
| */ |
| static struct lpfc_scsi_buf * |
| lpfc_new_scsi_buf(struct lpfc_hba * phba) |
| { |
| struct lpfc_scsi_buf *psb; |
| struct ulp_bde64 *bpl; |
| IOCB_t *iocb; |
| dma_addr_t pdma_phys; |
| uint16_t iotag; |
| |
| 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); |
| |
| /* 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); |
| 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 datadir = scsi_cmnd->sc_data_direction; |
| int dma_error; |
| |
| /* |
| * There are three possibilities here - use scatter-gather segment, use |
| * the single mapping, or neither. Start the lpfc command prep by |
| * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first |
| * data bde entry. |
| */ |
| bpl += 2; |
| if (scsi_cmnd->use_sg) { |
| /* |
| * The driver stores the segment count returned from pci_map_sg |
| * because this a count of dma-mappings used to map the use_sg |
| * pages. They are not guaranteed to be the same for those |
| * architectures that implement an IOMMU. |
| */ |
| sgel = (struct scatterlist *)scsi_cmnd->request_buffer; |
| lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel, |
| scsi_cmnd->use_sg, datadir); |
| if (lpfc_cmd->seg_cnt == 0) |
| return 1; |
| |
| if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) { |
| printk(KERN_ERR "%s: Too many sg segments from " |
| "dma_map_sg. Config %d, seg_cnt %d", |
| __FUNCTION__, phba->cfg_sg_seg_cnt, |
| lpfc_cmd->seg_cnt); |
| dma_unmap_sg(&phba->pcidev->dev, sgel, |
| lpfc_cmd->seg_cnt, datadir); |
| return 1; |
| } |
| |
| /* |
| * The driver established a maximum scatter-gather segment count |
| * during probe that limits the number of sg elements in any |
| * single scsi command. Just run through the seg_cnt and format |
| * the bde's. |
| */ |
| for (i = 0; i < lpfc_cmd->seg_cnt; i++) { |
| physaddr = sg_dma_address(sgel); |
| bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); |
| bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); |
| bpl->tus.f.bdeSize = sg_dma_len(sgel); |
| if (datadir == DMA_TO_DEVICE) |
| bpl->tus.f.bdeFlags = 0; |
| else |
| bpl->tus.f.bdeFlags = BUFF_USE_RCV; |
| bpl->tus.w = le32_to_cpu(bpl->tus.w); |
| bpl++; |
| sgel++; |
| num_bde++; |
| } |
| } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { |
| physaddr = dma_map_single(&phba->pcidev->dev, |
| scsi_cmnd->request_buffer, |
| scsi_cmnd->request_bufflen, |
| datadir); |
| dma_error = dma_mapping_error(physaddr); |
| if (dma_error) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0718 Unable to dma_map_single " |
| "request_buffer: x%x\n", |
| phba->brd_no, dma_error); |
| return 1; |
| } |
| |
| lpfc_cmd->nonsg_phys = physaddr; |
| bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr)); |
| bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr)); |
| bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen; |
| if (datadir == DMA_TO_DEVICE) |
| bpl->tus.f.bdeFlags = 0; |
| else |
| bpl->tus.f.bdeFlags = BUFF_USE_RCV; |
| bpl->tus.w = le32_to_cpu(bpl->tus.w); |
| num_bde = 1; |
| bpl++; |
| } |
| |
| /* |
| * Finish initializing those IOCB fields that are dependent on the |
| * scsi_cmnd request_buffer. Note that the bdeSize is explicitly |
| * reinitialized since all iocb memory resources are used many times |
| * for transmit, receive, and continuation bpl's. |
| */ |
| iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64)); |
| iocb_cmd->un.fcpi64.bdl.bdeSize += |
| (num_bde * sizeof (struct ulp_bde64)); |
| iocb_cmd->ulpBdeCount = 1; |
| iocb_cmd->ulpLe = 1; |
| fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen); |
| return 0; |
| } |
| |
| static void |
| lpfc_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) && (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); |
| } |
| } |
| } |
| |
| 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; |
| int result; |
| struct scsi_device *sdev, *tmp_sdev; |
| int depth = 0; |
| |
| lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4]; |
| lpfc_cmd->status = pIocbOut->iocb.ulpStatus; |
| |
| if (lpfc_cmd->status) { |
| if (lpfc_cmd->status == IOSTAT_LOCAL_REJECT && |
| (lpfc_cmd->result & IOERR_DRVR_MASK)) |
| lpfc_cmd->status = IOSTAT_DRIVER_REJECT; |
| else if (lpfc_cmd->status >= IOSTAT_CNT) |
| lpfc_cmd->status = IOSTAT_DEFAULT; |
| |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
| "%d:0729 FCP cmd x%x failed <%d/%d> status: " |
| "x%x result: x%x Data: x%x x%x\n", |
| phba->brd_no, cmd->cmnd[0], cmd->device->id, |
| cmd->device->lun, lpfc_cmd->status, |
| lpfc_cmd->result, pIocbOut->iocb.ulpContext, |
| lpfc_cmd->cur_iocbq.iocb.ulpIoTag); |
| |
| switch (lpfc_cmd->status) { |
| case IOSTAT_FCP_RSP_ERROR: |
| /* Call FCP RSP handler to determine result */ |
| lpfc_handle_fcp_err(lpfc_cmd); |
| break; |
| case IOSTAT_NPORT_BSY: |
| case IOSTAT_FABRIC_BSY: |
| cmd->result = ScsiResult(DID_BUS_BUSY, 0); |
| break; |
| default: |
| cmd->result = ScsiResult(DID_ERROR, 0); |
| break; |
| } |
| |
| if ((pnode == NULL ) |
| || (pnode->nlp_state != NLP_STE_MAPPED_NODE)) |
| cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY); |
| } else { |
| cmd->result = ScsiResult(DID_OK, 0); |
| } |
| |
| if (cmd->result || lpfc_cmd->fcp_rsp->rspSnsLen) { |
| uint32_t *lp = (uint32_t *)cmd->sense_buffer; |
| |
| lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
| "%d:0710 Iodone <%d/%d> cmd %p, error x%x " |
| "SNS x%x x%x Data: x%x x%x\n", |
| phba->brd_no, cmd->device->id, |
| cmd->device->lun, cmd, cmd->result, |
| *lp, *(lp + 3), cmd->retries, cmd->resid); |
| } |
| |
| result = cmd->result; |
| sdev = cmd->device; |
| cmd->scsi_done(cmd); |
| |
| if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) { |
| lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| return; |
| } |
| |
| if (!result && pnode != NULL && |
| ((jiffies - pnode->last_ramp_up_time) > |
| LPFC_Q_RAMP_UP_INTERVAL * HZ) && |
| ((jiffies - pnode->last_q_full_time) > |
| LPFC_Q_RAMP_UP_INTERVAL * HZ) && |
| (phba->cfg_lun_queue_depth > sdev->queue_depth)) { |
| shost_for_each_device(tmp_sdev, sdev->host) { |
| if (phba->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 != NULL) { |
| 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_log(phba, KERN_WARNING, LOG_FCP, |
| "%d:0711 detected queue full - lun queue depth " |
| " adjusted to %d.\n", phba->brd_no, depth); |
| } |
| } |
| |
| lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd); |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| } |
| |
| static void |
| lpfc_scsi_prep_cmnd(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd, |
| struct lpfc_nodelist *pnode) |
| { |
| struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd; |
| struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb; |
| struct lpfc_iocbq *piocbq = &(lpfc_cmd->cur_iocbq); |
| int datadir = scsi_cmnd->sc_data_direction; |
| |
| lpfc_cmd->fcp_rsp->rspSnsLen = 0; |
| /* clear task management bits */ |
| lpfc_cmd->fcp_cmnd->fcpCntl2 = 0; |
| |
| int_to_scsilun(lpfc_cmd->pCmd->device->lun, |
| &lpfc_cmd->fcp_cmnd->fcp_lun); |
| |
| memcpy(&fcp_cmnd->fcpCdb[0], scsi_cmnd->cmnd, 16); |
| |
| if (scsi_cmnd->device->tagged_supported) { |
| switch (scsi_cmnd->tag) { |
| case HEAD_OF_QUEUE_TAG: |
| fcp_cmnd->fcpCntl1 = HEAD_OF_Q; |
| break; |
| case ORDERED_QUEUE_TAG: |
| fcp_cmnd->fcpCntl1 = ORDERED_Q; |
| break; |
| default: |
| fcp_cmnd->fcpCntl1 = SIMPLE_Q; |
| break; |
| } |
| } else |
| fcp_cmnd->fcpCntl1 = 0; |
| |
| /* |
| * There are three possibilities here - use scatter-gather segment, use |
| * the single mapping, or neither. Start the lpfc command prep by |
| * bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first |
| * data bde entry. |
| */ |
| if (scsi_cmnd->use_sg) { |
| if (datadir == DMA_TO_DEVICE) { |
| iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; |
| iocb_cmd->un.fcpi.fcpi_parm = 0; |
| iocb_cmd->ulpPU = 0; |
| fcp_cmnd->fcpCntl3 = WRITE_DATA; |
| phba->fc4OutputRequests++; |
| } else { |
| iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; |
| iocb_cmd->ulpPU = PARM_READ_CHECK; |
| iocb_cmd->un.fcpi.fcpi_parm = |
| scsi_cmnd->request_bufflen; |
| fcp_cmnd->fcpCntl3 = READ_DATA; |
| phba->fc4InputRequests++; |
| } |
| } else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) { |
| if (datadir == DMA_TO_DEVICE) { |
| iocb_cmd->ulpCommand = CMD_FCP_IWRITE64_CR; |
| iocb_cmd->un.fcpi.fcpi_parm = 0; |
| iocb_cmd->ulpPU = 0; |
| fcp_cmnd->fcpCntl3 = WRITE_DATA; |
| phba->fc4OutputRequests++; |
| } else { |
| iocb_cmd->ulpCommand = CMD_FCP_IREAD64_CR; |
| iocb_cmd->ulpPU = PARM_READ_CHECK; |
| iocb_cmd->un.fcpi.fcpi_parm = |
| scsi_cmnd->request_bufflen; |
| fcp_cmnd->fcpCntl3 = READ_DATA; |
| phba->fc4InputRequests++; |
| } |
| } else { |
| iocb_cmd->ulpCommand = CMD_FCP_ICMND64_CR; |
| iocb_cmd->un.fcpi.fcpi_parm = 0; |
| iocb_cmd->ulpPU = 0; |
| fcp_cmnd->fcpCntl3 = 0; |
| phba->fc4ControlRequests++; |
| } |
| |
| /* |
| * Finish initializing those IOCB fields that are independent |
| * of the scsi_cmnd request_buffer |
| */ |
| piocbq->iocb.ulpContext = pnode->nlp_rpi; |
| if (pnode->nlp_fcp_info & NLP_FCP_2_DEVICE) |
| piocbq->iocb.ulpFCP2Rcvy = 1; |
| |
| piocbq->iocb.ulpClass = (pnode->nlp_fcp_info & 0x0f); |
| piocbq->context1 = lpfc_cmd; |
| piocbq->iocb_cmpl = lpfc_scsi_cmd_iocb_cmpl; |
| piocbq->iocb.ulpTimeout = lpfc_cmd->timeout; |
| } |
| |
| static int |
| lpfc_scsi_prep_task_mgmt_cmd(struct lpfc_hba *phba, |
| struct lpfc_scsi_buf *lpfc_cmd, |
| unsigned int lun, |
| uint8_t task_mgmt_cmd) |
| { |
| struct lpfc_sli *psli; |
| 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 == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) { |
| return 0; |
| } |
| |
| psli = &phba->sli; |
| piocbq = &(lpfc_cmd->cur_iocbq); |
| piocb = &piocbq->iocb; |
| |
| fcp_cmnd = lpfc_cmd->fcp_cmnd; |
| int_to_scsilun(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 int |
| lpfc_scsi_tgt_reset(struct lpfc_scsi_buf * lpfc_cmd, struct lpfc_hba * phba, |
| unsigned tgt_id, unsigned int lun, |
| struct lpfc_rport_data *rdata) |
| { |
| struct lpfc_iocbq *iocbq; |
| struct lpfc_iocbq *iocbqrsp; |
| int ret; |
| |
| lpfc_cmd->rdata = rdata; |
| ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, lun, |
| FCP_TARGET_RESET); |
| if (!ret) |
| return FAILED; |
| |
| lpfc_cmd->scsi_hba = phba; |
| iocbq = &lpfc_cmd->cur_iocbq; |
| iocbqrsp = lpfc_sli_get_iocbq(phba); |
| |
| if (!iocbqrsp) |
| return FAILED; |
| |
| /* 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, tgt_id, rdata->pnode->nlp_rpi, |
| rdata->pnode->nlp_flag); |
| |
| ret = lpfc_sli_issue_iocb_wait(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| iocbq, iocbqrsp, lpfc_cmd->timeout); |
| if (ret != IOCB_SUCCESS) { |
| 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; |
| } |
| |
| lpfc_sli_release_iocbq(phba, iocbqrsp); |
| return ret; |
| } |
| |
| const char * |
| lpfc_info(struct Scsi_Host *host) |
| { |
| struct lpfc_hba *phba = (struct lpfc_hba *) host->hostdata; |
| 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; |
| unsigned long iflag; |
| |
| spin_lock_irqsave(phba->host->host_lock, iflag); |
| |
| 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); |
| } |
| |
| spin_unlock_irqrestore(phba->host->host_lock, iflag); |
| } |
| |
| static int |
| lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *)) |
| { |
| struct lpfc_hba *phba = |
| (struct lpfc_hba *) cmnd->device->host->hostdata; |
| 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) { |
| cmnd->result = ScsiResult(DID_BUS_BUSY, 0); |
| goto out_fail_command; |
| } |
| lpfc_cmd = lpfc_get_scsi_buf (phba); |
| if (lpfc_cmd == NULL) { |
| lpfc_printf_log(phba, KERN_INFO, LOG_FCP, |
| "%d:0707 driver's buffer pool is empty, " |
| "IO busied\n", phba->brd_no); |
| 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; |
| |
| 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_hba *phba = (struct lpfc_hba *)shost->hostdata; |
| 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; |
| unsigned int loop_count = 0; |
| int ret = SUCCESS; |
| |
| lpfc_block_error_handler(cmnd); |
| spin_lock_irq(shost->host_lock); |
| |
| 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 (phba->hba_state >= LPFC_LINK_UP) |
| icmd->ulpCommand = CMD_ABORT_XRI_CN; |
| else |
| icmd->ulpCommand = CMD_CLOSE_XRI_CN; |
| |
| abtsiocb->iocb_cmpl = lpfc_sli_abort_fcp_cmpl; |
| if (lpfc_sli_issue_iocb(phba, pring, abtsiocb, 0) == IOCB_ERROR) { |
| lpfc_sli_release_iocbq(phba, abtsiocb); |
| ret = FAILED; |
| goto out; |
| } |
| |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_sli_poll_fcp_ring (phba); |
| |
| /* Wait for abort to complete */ |
| while (lpfc_cmd->pCmd == cmnd) |
| { |
| if (phba->cfg_poll & DISABLE_FCP_RING_INT) |
| lpfc_sli_poll_fcp_ring (phba); |
| |
| spin_unlock_irq(phba->host->host_lock); |
| schedule_timeout_uninterruptible(LPFC_ABORT_WAIT*HZ); |
| spin_lock_irq(phba->host->host_lock); |
| if (++loop_count |
| > (2 * phba->cfg_nodev_tmo)/LPFC_ABORT_WAIT) |
| break; |
| } |
| |
| if (lpfc_cmd->pCmd == cmnd) { |
| ret = FAILED; |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0748 abort handler timed out waiting for " |
| "abort to complete: ret %#x, ID %d, LUN %d, " |
| "snum %#lx\n", |
| phba->brd_no, ret, cmnd->device->id, |
| cmnd->device->lun, cmnd->serial_number); |
| } |
| |
| out: |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
| "%d:0749 SCSI Layer I/O Abort Request " |
| "Status x%x ID %d LUN %d snum %#lx\n", |
| phba->brd_no, ret, cmnd->device->id, |
| cmnd->device->lun, cmnd->serial_number); |
| |
| spin_unlock_irq(shost->host_lock); |
| |
| return ret; |
| } |
| |
| 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; |
| struct lpfc_scsi_buf *lpfc_cmd; |
| struct lpfc_iocbq *iocbq, *iocbqrsp; |
| struct lpfc_rport_data *rdata = cmnd->device->hostdata; |
| struct lpfc_nodelist *pnode = rdata->pnode; |
| uint32_t cmd_result = 0, cmd_status = 0; |
| int ret = FAILED; |
| int cnt, loopcnt; |
| |
| lpfc_block_error_handler(cmnd); |
| spin_lock_irq(shost->host_lock); |
| /* |
| * 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); |
| schedule_timeout_uninterruptible(msecs_to_jiffies(500)); |
| spin_lock_irq(phba->host->host_lock); |
| } |
| if ((pnode) && (pnode->nlp_state == NLP_STE_MAPPED_NODE)) |
| break; |
| } |
| |
| lpfc_cmd = lpfc_get_scsi_buf (phba); |
| if (lpfc_cmd == NULL) |
| goto out; |
| |
| lpfc_cmd->timeout = 60; |
| lpfc_cmd->scsi_hba = phba; |
| lpfc_cmd->rdata = rdata; |
| |
| ret = lpfc_scsi_prep_task_mgmt_cmd(phba, lpfc_cmd, cmnd->device->lun, |
| FCP_LUN_RESET); |
| if (!ret) |
| goto out_free_scsi_buf; |
| |
| iocbq = &lpfc_cmd->cur_iocbq; |
| |
| /* get a buffer for this IOCB command response */ |
| iocbqrsp = lpfc_sli_get_iocbq(phba); |
| if (iocbqrsp == NULL) |
| goto out_free_scsi_buf; |
| |
| lpfc_printf_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, cmnd->device->id, |
| cmnd->device->lun, pnode->nlp_rpi, pnode->nlp_flag); |
| |
| ret = lpfc_sli_issue_iocb_wait(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| iocbq, iocbqrsp, lpfc_cmd->timeout); |
| if (ret == IOCB_SUCCESS) |
| ret = SUCCESS; |
| |
| |
| cmd_result = iocbqrsp->iocb.un.ulpWord[4]; |
| cmd_status = iocbqrsp->iocb.ulpStatus; |
| |
| lpfc_sli_release_iocbq(phba, iocbqrsp); |
| |
| /* |
| * All outstanding txcmplq I/Os should have been aborted by the device. |
| * Unfortunately, some targets do not abide by this forcing the driver |
| * to double check. |
| */ |
| cnt = lpfc_sli_sum_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], |
| cmnd->device->id, cmnd->device->lun, |
| LPFC_CTX_LUN); |
| if (cnt) |
| 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) { |
| spin_unlock_irq(phba->host->host_lock); |
| schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); |
| spin_lock_irq(phba->host->host_lock); |
| |
| if (++loopcnt |
| > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) |
| break; |
| |
| cnt = lpfc_sli_sum_iocb(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| cmnd->device->id, cmnd->device->lun, |
| LPFC_CTX_LUN); |
| } |
| |
| if (cnt) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0719 LUN Reset I/O flush failure: cnt x%x\n", |
| phba->brd_no, cnt); |
| ret = FAILED; |
| } |
| |
| out_free_scsi_buf: |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| |
| 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, cmnd->device->id,cmnd->device->lun, |
| ret, cmd_status, cmd_result); |
| |
| out: |
| spin_unlock_irq(shost->host_lock); |
| return ret; |
| } |
| |
| 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; |
| struct lpfc_nodelist *ndlp = NULL; |
| int match; |
| int ret = FAILED, i, err_count = 0; |
| int cnt, loopcnt; |
| struct lpfc_scsi_buf * lpfc_cmd; |
| |
| lpfc_block_error_handler(cmnd); |
| spin_lock_irq(shost->host_lock); |
| |
| lpfc_cmd = lpfc_get_scsi_buf(phba); |
| if (lpfc_cmd == NULL) |
| goto out; |
| |
| /* The lpfc_cmd storage is reused. Set all loop invariants. */ |
| lpfc_cmd->timeout = 60; |
| 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. |
| */ |
| for (i = 0; i < LPFC_MAX_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; |
| |
| ret = lpfc_scsi_tgt_reset(lpfc_cmd, phba, i, cmnd->device->lun, |
| ndlp->rport->dd_data); |
| if (ret != SUCCESS) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0700 Bus Reset on target %d failed\n", |
| phba->brd_no, i); |
| err_count++; |
| } |
| } |
| |
| if (err_count == 0) |
| ret = SUCCESS; |
| |
| lpfc_release_scsi_buf(phba, lpfc_cmd); |
| |
| /* |
| * 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(phba, &phba->sli.ring[phba->sli.fcp_ring], |
| 0, 0, LPFC_CTX_HOST); |
| if (cnt) |
| lpfc_sli_abort_iocb(phba, &phba->sli.ring[phba->sli.fcp_ring], |
| 0, 0, 0, LPFC_CTX_HOST); |
| loopcnt = 0; |
| while(cnt) { |
| spin_unlock_irq(phba->host->host_lock); |
| schedule_timeout_uninterruptible(LPFC_RESET_WAIT*HZ); |
| spin_lock_irq(phba->host->host_lock); |
| |
| if (++loopcnt |
| > (2 * phba->cfg_nodev_tmo)/LPFC_RESET_WAIT) |
| break; |
| |
| cnt = lpfc_sli_sum_iocb(phba, |
| &phba->sli.ring[phba->sli.fcp_ring], |
| 0, 0, LPFC_CTX_HOST); |
| } |
| |
| if (cnt) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0715 Bus Reset I/O flush failure: cnt x%x left x%x\n", |
| phba->brd_no, cnt, i); |
| ret = FAILED; |
| } |
| |
| lpfc_printf_log(phba, |
| KERN_ERR, |
| LOG_FCP, |
| "%d:0714 SCSI layer issued Bus Reset Data: x%x\n", |
| phba->brd_no, ret); |
| out: |
| spin_unlock_irq(shost->host_lock); |
| return ret; |
| } |
| |
| static int |
| lpfc_slave_alloc(struct scsi_device *sdev) |
| { |
| struct lpfc_hba *phba = (struct lpfc_hba *)sdev->host->hostdata; |
| 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 = phba->cfg_lun_queue_depth + 2; |
| if (total >= phba->cfg_hba_queue_depth) { |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
| "%d:0704 At limitation of %d preallocated " |
| "command buffers\n", phba->brd_no, total); |
| return 0; |
| } else if (total + num_to_alloc > phba->cfg_hba_queue_depth) { |
| lpfc_printf_log(phba, KERN_WARNING, LOG_FCP, |
| "%d:0705 Allocation request of %d command " |
| "buffers will exceed max of %d. Reducing " |
| "allocation request to %d.\n", phba->brd_no, |
| 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(phba); |
| if (!scsi_buf) { |
| lpfc_printf_log(phba, KERN_ERR, LOG_FCP, |
| "%d:0706 Failed to allocate command " |
| "buffer\n", phba->brd_no); |
| 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_hba *phba = (struct lpfc_hba *) sdev->host->hostdata; |
| 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; |
| |
| 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_reset_lun_handler, |
| .eh_bus_reset_handler = lpfc_reset_bus_handler, |
| .slave_alloc = lpfc_slave_alloc, |
| .slave_configure = lpfc_slave_configure, |
| .slave_destroy = lpfc_slave_destroy, |
| .this_id = -1, |
| .sg_tablesize = LPFC_SG_SEG_CNT, |
| .cmd_per_lun = LPFC_CMD_PER_LUN, |
| .use_clustering = ENABLE_CLUSTERING, |
| .shost_attrs = lpfc_host_attrs, |
| .max_sectors = 0xFFFF, |
| }; |