linux-toradex.git/drivers/s390/scsi, branch tegra-11.2.11

[SCSI] zfcp: Trigger logging in the FCP channel on qdio error conditions

2010-07-28T14:48:58+00:00

Exploit the cio siosl function to trigger logging in the FCP channel
on qdio error conditions. Add a helper function in zfcp_qdio to ensure
that tracing is only triggered once before calling qdio_shutdown.

Trigger in zfcp for hardware logs are:
 - timeout for FSF requests to the FCP channel
 - "no recommendation" status from FCP channel
 - invalid FSF protocol status
 - stalled outbound queue
 - unknown request id on inbound queue
 - QDIO_ERROR_SLSB_STATE

All of the above triggers run from the Linux qdio softirq context, so
no additional synchronization is necessary for the handling of the
ZFCP_STATUS_ADAPTER_SIOSL_ISSUED flag.

Reviewed-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Introduce experimental support for DIF/DIX

2010-07-28T14:48:56+00:00

Introduce support for DIF/DIX in zfcp: Report the capabilities for the
Scsi_host, map the protection data when issuing I/O requests and
handle the new error codes. Also add the fsf data_direction field to
the hba trace, it is useful information for debugging in that area.
This is an EXPERIMENTAL feature for now.

Signed-off-by: Felix Beck 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Enable data division support for FCP devices

2010-07-28T14:48:55+00:00

Try to enable data division support for FCP devices and indicate in
the adapter status flag if it succeeded.

Reviewed-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Prevent access on uninitialized memory.

2010-07-28T14:48:53+00:00

Initialize allocated memory to zero to prevent access on error. This
prevents a possible error in the error handling path.

Signed-off-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Post events through FC transport class

2010-07-28T14:48:52+00:00

Post FC transport class netlink events for usage in the userspace,
e.g. for HBAAPI. Supported events are those required for the
polled events in HBAAPI.
- link up
- link down
- incoming RSCN
(events related to FC-AL are not supported, as zfcp has no support for FC-AL)

Signed-off-by: Sven Schuetz 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Cleanup QDIO attachment and improve processing.

2010-07-28T14:48:50+00:00

Some definitions and structures in the zfcp QDIO processing are
improved by the removal of not required variables and processing steps.
I addition the naming of some variables is changed to make their purpose
more clear.

Signed-off-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Cleanup function parameters for sbal value.

2010-07-28T14:48:49+00:00

A lot of functions require the amount of SBALs as one of their
parameter which is most times invariable.  Therefore remove this
parameter and set the SBAL value explicitly if a non standard value is
required.  In addition the warning message "oversized data" is
replaced with a BUG_ON() statement assuring the limits defined and
requested by zfcp.

Signed-off-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Use correct width for timer_interval field

2010-07-28T14:48:48+00:00

The timer_interval is 14 bits in width. Introduce a define for
properly masking the value.

Reviewed-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Remove SCSI device when removing unit

2010-07-28T14:48:46+00:00

Configuring a LUN in zfcp, also creates a SCSI device. For
consistency, it makes sense to remove the SCSI device when the LUN is
deconfigured. Replace the flush_work with the call to
scsi_remove_device: scsi_remove_device also takes the scan_mutex that
synchronizes itself with any long running device discovery.

Reviewed-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley

[SCSI] zfcp: Use memdup_user and kstrdup

2010-07-28T14:48:45+00:00

Use the functions memdup_user and kstrdup to allocate memory and copy
the data in one step, saving some lines of code.

Reviewed-by: Swen Schillig 
Signed-off-by: Christof Schmitt 
Signed-off-by: James Bottomley