mirror of https://gitee.com/openkylin/linux.git
[SCSI] mpt2sas: Enable TLR for SSP TAPE drives (Added SAS Transport APIs)
If TLR is supported for end device, MPT2SAS driver will enable the TLR bit in the SCSI_IO for every request. If there is a response with MPI2_SCSITASKMGMT_RSP_INVALID_FRAME, the driver will turn off the TLR logic. [jejb: updated to new transport class TLR API] Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com> Reviewed-by: Eric Moore <Eric.moore@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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@ -1309,7 +1309,6 @@ _scsih_slave_alloc(struct scsi_device *sdev)
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struct MPT2SAS_DEVICE *sas_device_priv_data;
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struct scsi_target *starget;
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struct _raid_device *raid_device;
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struct _sas_device *sas_device;
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unsigned long flags;
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sas_device_priv_data = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
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@ -1336,21 +1335,8 @@ _scsih_slave_alloc(struct scsi_device *sdev)
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if (raid_device)
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raid_device->sdev = sdev; /* raid is single lun */
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spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
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} else {
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/* set TLR bit for SSP devices */
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if (!(ioc->facts.IOCCapabilities &
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MPI2_IOCFACTS_CAPABILITY_TLR))
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goto out;
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spin_lock_irqsave(&ioc->sas_device_lock, flags);
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sas_device = mpt2sas_scsih_sas_device_find_by_sas_address(ioc,
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sas_device_priv_data->sas_target->sas_address);
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spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
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if (sas_device && sas_device->device_info &
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MPI2_SAS_DEVICE_INFO_SSP_TARGET)
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sas_device_priv_data->flags |= MPT_DEVICE_TLR_ON;
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}
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out:
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return 0;
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}
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@ -1616,6 +1602,32 @@ _scsih_get_volume_capabilities(struct MPT2SAS_ADAPTER *ioc,
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kfree(vol_pg0);
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}
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/**
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* _scsih_enable_tlr - setting TLR flags
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* @ioc: per adapter object
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* @sdev: scsi device struct
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*
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* Enabling Transaction Layer Retries for tape devices when
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* vpd page 0x90 is present
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*
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*/
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static void
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_scsih_enable_tlr(struct MPT2SAS_ADAPTER *ioc, struct scsi_device *sdev)
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{
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/* only for TAPE */
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if (sdev->type != TYPE_TAPE)
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return;
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if (!(ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR))
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return;
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sas_enable_tlr(sdev);
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sdev_printk(KERN_INFO, sdev, "TLR %s\n",
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sas_is_tlr_enabled(sdev) ? "Enabled" : "Disabled");
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return;
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}
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/**
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* _scsih_slave_configure - device configure routine.
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* @sdev: scsi device struct
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@ -1761,8 +1773,10 @@ _scsih_slave_configure(struct scsi_device *sdev)
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_scsih_change_queue_depth(sdev, qdepth, SCSI_QDEPTH_DEFAULT);
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if (ssp_target)
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if (ssp_target) {
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sas_read_port_mode_page(sdev);
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_scsih_enable_tlr(ioc, sdev);
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}
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return 0;
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}
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@ -3049,7 +3063,7 @@ _scsih_qcmd(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
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} else
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mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
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if ((sas_device_priv_data->flags & MPT_DEVICE_TLR_ON))
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if (sas_is_tlr_enabled(scmd->device))
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mpi_control |= MPI2_SCSIIO_CONTROL_TLR_ON;
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smid = mpt2sas_base_get_smid_scsiio(ioc, ioc->scsi_io_cb_idx, scmd);
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@ -3438,10 +3452,11 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
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le32_to_cpu(mpi_reply->ResponseInfo) & 0xFF;
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if (!sas_device_priv_data->tlr_snoop_check) {
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sas_device_priv_data->tlr_snoop_check++;
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if ((sas_device_priv_data->flags & MPT_DEVICE_TLR_ON) &&
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response_code == MPI2_SCSITASKMGMT_RSP_INVALID_FRAME)
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sas_device_priv_data->flags &=
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~MPT_DEVICE_TLR_ON;
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if (sas_is_tlr_enabled(scmd->device) &&
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response_code == MPI2_SCSITASKMGMT_RSP_INVALID_FRAME) {
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sas_disable_tlr(scmd->device);
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sdev_printk(KERN_INFO, scmd->device, "TLR disabled\n");
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}
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}
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xfer_cnt = le32_to_cpu(mpi_reply->TransferCount);
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