K 10
svn:author
V 5
gibbs
K 8
svn:date
V 27
2011-07-18T19:26:16.307435Z
K 7
svn:log
V 3018
Revamp the CAM enclosure services driver, renaming it to "enc" from "ses" in
the process.  This updated driver uses an in-kernel daemon to track state
changes and publishes physical path location information for disk elements
into the CAM device database.

share/examples/ses/Makefile.inc:
share/examples/ses/srcs/eltsub.c:
share/examples/ses/srcs/sesd.c:
share/examples/ses/srcs/getencstat.c:
share/examples/ses/srcs/setobjstat.c:
share/examples/ses/srcs/inienc.c:
share/examples/ses/srcs/getobjstat.c:
share/examples/ses/srcs/getnobj.c:
share/examples/ses/srcs/getobjmap.c:
share/examples/ses/srcs/setencstat.c:
	Update for changes in driver name and API.  The ioctl interface
	is largely unchanged and could use additional refinement.  It
	would be nice to be able to fetch the status of all elements in
	a single ioctl call and to have the ioctls that return variable
	length data allow you to query the necessary allocation size
	by passing in a zero length buffer.

sys/sparc64/conf/GENERIC:
sys/ia64/conf/GENERIC:
sys/mips/conf/OCTEON1:
sys/pc98/conf/GENERIC:
sys/i386/conf/GENERIC:
sys/amd64/conf/GENERIC:
	ses -> enc

sys/conf/files:
sys/modules/cam/Makefile:
sys/cam/scsi/scsi_enc_internal.h
sys/cam/scsi/scsi_enc_ses.c
sys/cam/scsi/scsi_enc_safte.c
sys/cam/scsi/scsi_ses.c
sys/cam/scsi/scsi_enc.c
	Split the enc driver into a generic driver file and one file
	each for the SES and SAF-TE personalities.

sys/cam/scsi/scsi_ses.h:
	o Retain this header, but use it to only hold structures derived
	  from the T10 SES spec.  The driver interface can be found in
	  scsi_enc.h.
	o Add definitions for most SES pages.

sys/cam/scsi/scsi_enc.c
sys/cam/scsi/scsi_enc.h
	o Use a function vector table to allow interaction between the
	  generic and protocol specific portions of this driver.
	o Provide a generic mechanism allowing personalities to define a
	  finite state machine that is executed from a daemon thread context.
	o Track CAM device arrival events and pass these on to personalities
	  that have registered an interest in them.  These notifications are
	  used to trigger physical path updates in the CAM EDT.

sys/cam/scsi/scsi_enc_safte.c:
	The SAF-TE personality.  This module is largely untouched by this
	update.  To achieve the same level of support as we have for SES,
	it will need to define an FSM and code to determine the physical
	paths of elements within the enclosure.

sys/cam/scsi/scsi_enc_ses.c:
	o Implement a state machine to fetch configuration, status, element
	  descriptors, and additional element status.
	o Build a "element map" that indexes into the config and status
	  data retrieved from a SES device.  Use this to simplify our
	  responses to ioctls.
	o Add support for using SAS domain/phy WWN data to determine the
	  physical path (ence@<enc WWN>/type@<elm type>/slot@<slot #>)
	  of an element.  Stubs are in place for FC, but both FC and SPI
	  will need additional work in order to be supported.

Sponsored by:	Spectra Logic Corporation
Submitted by:	gibbs, will

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