linux-toradex.git/include/uapi/scsi, branch v4.6-rc6

cxlflash: Fix to avoid virtual LUN failover failure

2016-01-07T01:50:08+00:00

Applications which use virtual LUN's that are backed by a physical LUN
over both adapter ports may experience an I/O failure in the event of a
link loss (e.g. cable pull).

Virtual LUNs may be accessed through one or both ports of the adapter.
This access is encoded in the translation entries that comprise the
virtual LUN and used by the AFU for load-balancing I/O and handling
failover scenarios. In a link loss scenario, even though the AFU is able
to maintain connectivity to the LUN, it is up to the application to
retry the failed I/O. When applications are unaware of the virtual LUN's
underlying topology, they are unable to make a sound decision of when to
retry an I/O and therefore are forced to make their reaction to a failed
I/O absolute. The result is either a failure to retry I/O or increased
latency for scenarios where a retry is pointless.

To remedy this scenario, provide feedback back to the application on
virtual LUN creation as to which ports the LUN may be accessed. LUN's
spanning both ports are candidates for a retry in a presence of an I/O
failure.

Signed-off-by: Matthew R. Ochs 
Acked-by: Manoj Kumar 
Reviewed-by: Uma Krishnan 
Signed-off-by: Martin K. Petersen

cxlflash: Virtual LUN support

2015-08-27T01:05:39+00:00

Add support for physical LUN segmentation (virtual LUNs) to device
driver supporting the IBM CXL Flash adapter. This patch allows user
space applications to virtually segment a physical LUN into N virtual
LUNs, taking advantage of the translation features provided by this
adapter.

Signed-off-by: Matthew R. Ochs 
Signed-off-by: Manoj N. Kumar 
Reviewed-by: Michael Neuling 
Reviewed-by: Wen Xiong 
Signed-off-by: James Bottomley

cxlflash: Superpipe support

2015-08-27T01:04:37+00:00

Add superpipe supporting infrastructure to device driver for the IBM CXL
Flash adapter. This patch allows userspace applications to take advantage
of the accelerated I/O features that this adapter provides and bypass the
traditional filesystem stack.

Signed-off-by: Matthew R. Ochs 
Signed-off-by: Manoj N. Kumar 
Reviewed-by: Michael Neuling 
Reviewed-by: Wen Xiong 
Reviewed-by: Brian King 
Signed-off-by: James Bottomley

[SCSI] Merge tag 'fcoe-02-19-13' into for-linus

2013-03-01T09:10:08+00:00

FCoE Updates for 3.9

Signed-off-by: James Bottomley

UAPI: (Scripted) Disintegrate include/scsi/fc

2013-01-07T22:58:36+00:00

Signed-off-by: David Howells 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Michael Kerrisk 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones

UAPI: (Scripted) Disintegrate include/scsi

2012-12-19T16:07:23+00:00

Signed-off-by: David Howells 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Michael Kerrisk 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones

UAPI: (Scripted) Set up UAPI Kbuild files

2012-10-02T17:01:35+00:00

Set up empty UAPI Kbuild files to be populated by the header splitter.

Signed-off-by: David Howells 
Acked-by: Arnd Bergmann 
Acked-by: Thomas Gleixner 
Acked-by: Paul E. McKenney 
Acked-by: Dave Jones