For any SCSI command, if the driver receives
IOC status = SCSI_IOC_TERMINATED and log info = 0x32010081 then
that command will be completed with DID_RESET host status.
The definition of this log info value is
"Virtual IO has failed and has to be retried".
Firmware will provide this log info value with IOC Status
"SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume)
is pulled and pushed back within some minimal delay.
With this log info value, firmware informs the driver to retry the
failed IO command infinite times, so to provide some time for the
firmware to discover the reinserted drive successfully instated of
just retrying failed command for five times(doesn't giving enough
time for firmware to complete the drive discovery) and failing the
IO permanently even though drive came back successfully.
Changes in v1:
Defined macro VIRTUAL_IO_FAILED_RETRY for magic a value 0x32010081
Signed-off-by: Sreekanth Reddy <[email protected]>
---
drivers/scsi/mpt3sas/mpt3sas_base.h | 2 ++
drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 +++
2 files changed, 5 insertions(+)
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
index 0ffe763..f3f79be 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.h
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
@@ -203,6 +203,8 @@
#define MFG10_GF0_SSD_DATA_SCRUB_DISABLE (0x00000008)
#define MFG10_GF0_SINGLE_DRIVE_R0 (0x00000010)
+#define VIRTUAL_IO_FAILED_RETRY (0x32010081)
+
/* OEM Specific Flags will come from OEM specific header files */
struct Mpi2ManufacturingPage10_t {
MPI2_CONFIG_PAGE_HEADER Header; /* 00h */
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 7060c8b..7587f77 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -4302,6 +4302,9 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
scmd->device->expecting_cc_ua = 1;
}
break;
+ } else if (log_info == VIRTUAL_IO_FAILED_RETRY) {
+ scmd->result = DID_RESET << 16;
+ break;
}
scmd->result = DID_SOFT_ERROR << 16;
break;
--
2.0.2
On Tue, Jun 16, 2015 at 11:05:24AM +0530, Sreekanth Reddy wrote:
> For any SCSI command, if the driver receives
> IOC status = SCSI_IOC_TERMINATED and log info = 0x32010081 then
> that command will be completed with DID_RESET host status.
>
> The definition of this log info value is
> "Virtual IO has failed and has to be retried".
>
> Firmware will provide this log info value with IOC Status
> "SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume)
> is pulled and pushed back within some minimal delay.
> With this log info value, firmware informs the driver to retry the
> failed IO command infinite times, so to provide some time for the
> firmware to discover the reinserted drive successfully instated of
> just retrying failed command for five times(doesn't giving enough
> time for firmware to complete the drive discovery) and failing the
> IO permanently even though drive came back successfully.
>
> Changes in v1:
> Defined macro VIRTUAL_IO_FAILED_RETRY for magic a value 0x32010081
>
> Signed-off-by: Sreekanth Reddy <[email protected]>
> ---
> drivers/scsi/mpt3sas/mpt3sas_base.h | 2 ++
> drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 +++
> 2 files changed, 5 insertions(+)
>
> diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.h b/drivers/scsi/mpt3sas/mpt3sas_base.h
> index 0ffe763..f3f79be 100644
> --- a/drivers/scsi/mpt3sas/mpt3sas_base.h
> +++ b/drivers/scsi/mpt3sas/mpt3sas_base.h
> @@ -203,6 +203,8 @@
> #define MFG10_GF0_SSD_DATA_SCRUB_DISABLE (0x00000008)
> #define MFG10_GF0_SINGLE_DRIVE_R0 (0x00000010)
>
> +#define VIRTUAL_IO_FAILED_RETRY (0x32010081)
> +
> /* OEM Specific Flags will come from OEM specific header files */
> struct Mpi2ManufacturingPage10_t {
> MPI2_CONFIG_PAGE_HEADER Header; /* 00h */
> diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> index 7060c8b..7587f77 100644
> --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
> @@ -4302,6 +4302,9 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
> scmd->device->expecting_cc_ua = 1;
> }
> break;
> + } else if (log_info == VIRTUAL_IO_FAILED_RETRY) {
> + scmd->result = DID_RESET << 16;
> + break;
> }
> scmd->result = DID_SOFT_ERROR << 16;
> break;
> --
> 2.0.2
>
Reviewed-by: Johannes Thumshirn <[email protected]>
--
Johannes Thumshirn Storage
[email protected] +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: F. Imend?rffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG N?rnberg)
>>>>> Sreekanth Reddy <[email protected]> writes:
> For any SCSI command, if the driver receives IOC status =
> SCSI_IOC_TERMINATED and log info = 0x32010081 then that command will
> be completed with DID_RESET host status.
> The definition of this log info value is "Virtual IO has failed and
> has to be retried".
> Firmware will provide this log info value with IOC Status
> "SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume)
> is pulled and pushed back within some minimal delay. With this log
> info value, firmware informs the driver to retry the failed IO command
> infinite times, so to provide some time for the firmware to discover
> the reinserted drive successfully instated of just retrying failed
> command for five times(doesn't giving enough time for firmware to
> complete the drive discovery) and failing the IO permanently even
> though drive came back successfully.
Reviewed-by: Martin K. Petersen <[email protected]>
--
Martin K. Petersen Oracle Linux Engineering