![James Smart](/assets/img/avatar_default.png)
Add support for new dev_loss_tmo callback Goodness is that it removes code for a parallel nodev timer that existed in the driver Add support for the new fast_io_fail callback Signed-off-by: James Smart <James.Smart@emulex.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
1288 lines
36 KiB
C
1288 lines
36 KiB
C
/*******************************************************************
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* This file is part of the Emulex Linux Device Driver for *
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* Fibre Channel Host Bus Adapters. *
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* Copyright (C) 2004-2006 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* Portions Copyright (C) 2004-2005 Christoph Hellwig *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*******************************************************************/
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_tcq.h>
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#include <scsi/scsi_transport_fc.h>
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#include "lpfc_version.h"
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#include "lpfc_hw.h"
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#include "lpfc_sli.h"
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#include "lpfc_disc.h"
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#include "lpfc_scsi.h"
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#include "lpfc.h"
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#include "lpfc_logmsg.h"
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#include "lpfc_crtn.h"
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#define LPFC_RESET_WAIT 2
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#define LPFC_ABORT_WAIT 2
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/*
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* This routine allocates a scsi buffer, which contains all the necessary
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* information needed to initiate a SCSI I/O. The non-DMAable buffer region
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* contains information to build the IOCB. The DMAable region contains
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* memory for the FCP CMND, FCP RSP, and the inital BPL. In addition to
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* allocating memeory, the FCP CMND and FCP RSP BDEs are setup in the BPL
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* and the BPL BDE is setup in the IOCB.
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*/
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static struct lpfc_scsi_buf *
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lpfc_new_scsi_buf(struct lpfc_hba * phba)
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{
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struct lpfc_scsi_buf *psb;
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struct ulp_bde64 *bpl;
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IOCB_t *iocb;
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dma_addr_t pdma_phys;
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uint16_t iotag;
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psb = kmalloc(sizeof(struct lpfc_scsi_buf), GFP_KERNEL);
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if (!psb)
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return NULL;
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memset(psb, 0, sizeof (struct lpfc_scsi_buf));
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psb->scsi_hba = phba;
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/*
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* Get memory from the pci pool to map the virt space to pci bus space
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* for an I/O. The DMA buffer includes space for the struct fcp_cmnd,
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* struct fcp_rsp and the number of bde's necessary to support the
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* sg_tablesize.
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*/
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psb->data = pci_pool_alloc(phba->lpfc_scsi_dma_buf_pool, GFP_KERNEL,
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&psb->dma_handle);
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if (!psb->data) {
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kfree(psb);
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return NULL;
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}
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/* Initialize virtual ptrs to dma_buf region. */
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memset(psb->data, 0, phba->cfg_sg_dma_buf_size);
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/* Allocate iotag for psb->cur_iocbq. */
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iotag = lpfc_sli_next_iotag(phba, &psb->cur_iocbq);
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if (iotag == 0) {
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pci_pool_free(phba->lpfc_scsi_dma_buf_pool,
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psb->data, psb->dma_handle);
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kfree (psb);
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return NULL;
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}
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psb->cur_iocbq.iocb_flag |= LPFC_IO_FCP;
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psb->fcp_cmnd = psb->data;
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psb->fcp_rsp = psb->data + sizeof(struct fcp_cmnd);
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psb->fcp_bpl = psb->data + sizeof(struct fcp_cmnd) +
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sizeof(struct fcp_rsp);
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/* Initialize local short-hand pointers. */
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bpl = psb->fcp_bpl;
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pdma_phys = psb->dma_handle;
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/*
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* The first two bdes are the FCP_CMD and FCP_RSP. The balance are sg
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* list bdes. Initialize the first two and leave the rest for
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* queuecommand.
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*/
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bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
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bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
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bpl->tus.f.bdeSize = sizeof (struct fcp_cmnd);
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bpl->tus.f.bdeFlags = BUFF_USE_CMND;
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bpl->tus.w = le32_to_cpu(bpl->tus.w);
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bpl++;
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/* Setup the physical region for the FCP RSP */
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pdma_phys += sizeof (struct fcp_cmnd);
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bpl->addrHigh = le32_to_cpu(putPaddrHigh(pdma_phys));
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bpl->addrLow = le32_to_cpu(putPaddrLow(pdma_phys));
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bpl->tus.f.bdeSize = sizeof (struct fcp_rsp);
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bpl->tus.f.bdeFlags = (BUFF_USE_CMND | BUFF_USE_RCV);
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bpl->tus.w = le32_to_cpu(bpl->tus.w);
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/*
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* Since the IOCB for the FCP I/O is built into this lpfc_scsi_buf,
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* initialize it with all known data now.
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*/
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pdma_phys += (sizeof (struct fcp_rsp));
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iocb = &psb->cur_iocbq.iocb;
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iocb->un.fcpi64.bdl.ulpIoTag32 = 0;
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iocb->un.fcpi64.bdl.addrHigh = putPaddrHigh(pdma_phys);
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iocb->un.fcpi64.bdl.addrLow = putPaddrLow(pdma_phys);
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iocb->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
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iocb->un.fcpi64.bdl.bdeFlags = BUFF_TYPE_BDL;
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iocb->ulpBdeCount = 1;
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iocb->ulpClass = CLASS3;
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return psb;
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}
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static struct lpfc_scsi_buf*
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lpfc_get_scsi_buf(struct lpfc_hba * phba)
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{
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struct lpfc_scsi_buf * lpfc_cmd = NULL;
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struct list_head *scsi_buf_list = &phba->lpfc_scsi_buf_list;
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unsigned long iflag = 0;
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spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
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list_remove_head(scsi_buf_list, lpfc_cmd, struct lpfc_scsi_buf, list);
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spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
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return lpfc_cmd;
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}
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static void
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lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
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{
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unsigned long iflag = 0;
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spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
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psb->pCmd = NULL;
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list_add_tail(&psb->list, &phba->lpfc_scsi_buf_list);
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spin_unlock_irqrestore(&phba->scsi_buf_list_lock, iflag);
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}
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static int
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lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
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{
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struct scsi_cmnd *scsi_cmnd = lpfc_cmd->pCmd;
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struct scatterlist *sgel = NULL;
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struct fcp_cmnd *fcp_cmnd = lpfc_cmd->fcp_cmnd;
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struct ulp_bde64 *bpl = lpfc_cmd->fcp_bpl;
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IOCB_t *iocb_cmd = &lpfc_cmd->cur_iocbq.iocb;
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dma_addr_t physaddr;
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uint32_t i, num_bde = 0;
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int datadir = scsi_cmnd->sc_data_direction;
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int dma_error;
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/*
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* There are three possibilities here - use scatter-gather segment, use
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* the single mapping, or neither. Start the lpfc command prep by
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* bumping the bpl beyond the fcp_cmnd and fcp_rsp regions to the first
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* data bde entry.
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*/
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bpl += 2;
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if (scsi_cmnd->use_sg) {
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/*
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* The driver stores the segment count returned from pci_map_sg
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* because this a count of dma-mappings used to map the use_sg
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* pages. They are not guaranteed to be the same for those
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* architectures that implement an IOMMU.
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*/
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sgel = (struct scatterlist *)scsi_cmnd->request_buffer;
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lpfc_cmd->seg_cnt = dma_map_sg(&phba->pcidev->dev, sgel,
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scsi_cmnd->use_sg, datadir);
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if (lpfc_cmd->seg_cnt == 0)
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return 1;
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if (lpfc_cmd->seg_cnt > phba->cfg_sg_seg_cnt) {
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printk(KERN_ERR "%s: Too many sg segments from "
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"dma_map_sg. Config %d, seg_cnt %d",
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__FUNCTION__, phba->cfg_sg_seg_cnt,
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lpfc_cmd->seg_cnt);
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dma_unmap_sg(&phba->pcidev->dev, sgel,
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lpfc_cmd->seg_cnt, datadir);
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return 1;
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}
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/*
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* The driver established a maximum scatter-gather segment count
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* during probe that limits the number of sg elements in any
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* single scsi command. Just run through the seg_cnt and format
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* the bde's.
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*/
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for (i = 0; i < lpfc_cmd->seg_cnt; i++) {
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physaddr = sg_dma_address(sgel);
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bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
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bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
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bpl->tus.f.bdeSize = sg_dma_len(sgel);
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if (datadir == DMA_TO_DEVICE)
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bpl->tus.f.bdeFlags = 0;
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else
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bpl->tus.f.bdeFlags = BUFF_USE_RCV;
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bpl->tus.w = le32_to_cpu(bpl->tus.w);
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bpl++;
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sgel++;
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num_bde++;
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}
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} else if (scsi_cmnd->request_buffer && scsi_cmnd->request_bufflen) {
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physaddr = dma_map_single(&phba->pcidev->dev,
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scsi_cmnd->request_buffer,
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scsi_cmnd->request_bufflen,
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datadir);
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dma_error = dma_mapping_error(physaddr);
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if (dma_error) {
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lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
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"%d:0718 Unable to dma_map_single "
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"request_buffer: x%x\n",
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phba->brd_no, dma_error);
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return 1;
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}
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lpfc_cmd->nonsg_phys = physaddr;
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bpl->addrLow = le32_to_cpu(putPaddrLow(physaddr));
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bpl->addrHigh = le32_to_cpu(putPaddrHigh(physaddr));
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bpl->tus.f.bdeSize = scsi_cmnd->request_bufflen;
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if (datadir == DMA_TO_DEVICE)
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bpl->tus.f.bdeFlags = 0;
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else
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bpl->tus.f.bdeFlags = BUFF_USE_RCV;
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bpl->tus.w = le32_to_cpu(bpl->tus.w);
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num_bde = 1;
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bpl++;
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}
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/*
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* Finish initializing those IOCB fields that are dependent on the
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* scsi_cmnd request_buffer. Note that the bdeSize is explicitly
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* reinitialized since all iocb memory resources are used many times
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* for transmit, receive, and continuation bpl's.
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*/
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iocb_cmd->un.fcpi64.bdl.bdeSize = (2 * sizeof (struct ulp_bde64));
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iocb_cmd->un.fcpi64.bdl.bdeSize +=
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(num_bde * sizeof (struct ulp_bde64));
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iocb_cmd->ulpBdeCount = 1;
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iocb_cmd->ulpLe = 1;
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fcp_cmnd->fcpDl = be32_to_cpu(scsi_cmnd->request_bufflen);
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return 0;
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}
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static void
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lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
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{
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/*
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* There are only two special cases to consider. (1) the scsi command
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* requested scatter-gather usage or (2) the scsi command allocated
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* a request buffer, but did not request use_sg. There is a third
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* case, but it does not require resource deallocation.
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*/
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if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
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dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
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psb->seg_cnt, psb->pCmd->sc_data_direction);
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} else {
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if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
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dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
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psb->pCmd->request_bufflen,
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psb->pCmd->sc_data_direction);
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}
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}
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}
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static void
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lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
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{
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struct scsi_cmnd *cmnd = lpfc_cmd->pCmd;
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struct fcp_cmnd *fcpcmd = lpfc_cmd->fcp_cmnd;
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struct fcp_rsp *fcprsp = lpfc_cmd->fcp_rsp;
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struct lpfc_hba *phba = lpfc_cmd->scsi_hba;
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uint32_t fcpi_parm = lpfc_cmd->cur_iocbq.iocb.un.fcpi.fcpi_parm;
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uint32_t resp_info = fcprsp->rspStatus2;
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uint32_t scsi_status = fcprsp->rspStatus3;
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uint32_t host_status = DID_OK;
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uint32_t rsplen = 0;
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/*
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* If this is a task management command, there is no
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* scsi packet associated with this lpfc_cmd. The driver
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* consumes it.
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*/
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if (fcpcmd->fcpCntl2) {
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scsi_status = 0;
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goto out;
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}
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lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
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"%d:0730 FCP command failed: RSP "
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"Data: x%x x%x x%x x%x x%x x%x\n",
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phba->brd_no, resp_info, scsi_status,
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be32_to_cpu(fcprsp->rspResId),
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be32_to_cpu(fcprsp->rspSnsLen),
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be32_to_cpu(fcprsp->rspRspLen),
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fcprsp->rspInfo3);
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if (resp_info & RSP_LEN_VALID) {
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rsplen = be32_to_cpu(fcprsp->rspRspLen);
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if ((rsplen != 0 && rsplen != 4 && rsplen != 8) ||
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(fcprsp->rspInfo3 != RSP_NO_FAILURE)) {
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host_status = DID_ERROR;
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goto out;
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}
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}
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if ((resp_info & SNS_LEN_VALID) && fcprsp->rspSnsLen) {
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uint32_t snslen = be32_to_cpu(fcprsp->rspSnsLen);
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if (snslen > SCSI_SENSE_BUFFERSIZE)
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snslen = SCSI_SENSE_BUFFERSIZE;
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memcpy(cmnd->sense_buffer, &fcprsp->rspInfo0 + rsplen, snslen);
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}
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cmnd->resid = 0;
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if (resp_info & RESID_UNDER) {
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cmnd->resid = be32_to_cpu(fcprsp->rspResId);
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lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
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"%d:0716 FCP Read Underrun, expected %d, "
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"residual %d Data: x%x x%x x%x\n", phba->brd_no,
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be32_to_cpu(fcpcmd->fcpDl), cmnd->resid,
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fcpi_parm, cmnd->cmnd[0], cmnd->underflow);
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/*
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* The cmnd->underflow is the minimum number of bytes that must
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* be transfered for this command. Provided a sense condition
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* is not present, make sure the actual amount transferred is at
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* least the underflow value or fail.
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*/
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if (!(resp_info & SNS_LEN_VALID) &&
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(scsi_status == SAM_STAT_GOOD) &&
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(cmnd->request_bufflen - cmnd->resid) < cmnd->underflow) {
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lpfc_printf_log(phba, KERN_INFO, LOG_FCP,
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"%d:0717 FCP command x%x residual "
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"underrun converted to error "
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"Data: x%x x%x x%x\n", phba->brd_no,
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cmnd->cmnd[0], cmnd->request_bufflen,
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cmnd->resid, cmnd->underflow);
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host_status = DID_ERROR;
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}
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} else if (resp_info & RESID_OVER) {
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lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
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"%d:0720 FCP command x%x residual "
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"overrun error. Data: x%x x%x \n",
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phba->brd_no, cmnd->cmnd[0],
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cmnd->request_bufflen, cmnd->resid);
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host_status = DID_ERROR;
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|
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/*
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* Check SLI validation that all the transfer was actually done
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* (fcpi_parm should be zero). Apply check only to reads.
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*/
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} else if ((scsi_status == SAM_STAT_GOOD) && fcpi_parm &&
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(cmnd->sc_data_direction == DMA_FROM_DEVICE)) {
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lpfc_printf_log(phba, KERN_WARNING, LOG_FCP,
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"%d:0734 FCP Read Check Error Data: "
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"x%x x%x x%x x%x\n", phba->brd_no,
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be32_to_cpu(fcpcmd->fcpDl),
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be32_to_cpu(fcprsp->rspResId),
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fcpi_parm, cmnd->cmnd[0]);
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host_status = DID_ERROR;
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cmnd->resid = cmnd->request_bufflen;
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}
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out:
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cmnd->result = ScsiResult(host_status, scsi_status);
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}
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|
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static void
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lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
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struct lpfc_iocbq *pIocbOut)
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{
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struct lpfc_scsi_buf *lpfc_cmd =
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(struct lpfc_scsi_buf *) pIocbIn->context1;
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struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
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struct lpfc_nodelist *pnode = rdata->pnode;
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struct scsi_cmnd *cmd = lpfc_cmd->pCmd;
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int result;
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struct scsi_device *sdev, *tmp_sdev;
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int depth = 0;
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lpfc_cmd->result = pIocbOut->iocb.un.ulpWord[4];
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lpfc_cmd->status = pIocbOut->iocb.ulpStatus;
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|
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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_devloss_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 devloss 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_devloss_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_devloss_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_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_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,
|
|
};
|