SES(4)							   BSD Kernel Interfaces Manual 						    SES(4)

NAME

     ses -- SCSI Environmental Services driver

SYNOPSIS

     device ses

DESCRIPTION

     The ses driver provides support for all SCSI devices of the environmental services class that are attached to the system through a supported
     SCSI Host Adapter, as well as emulated support for SAF-TE (SCSI Accessible Fault Tolerant Enclosures).  The environmental services class gen-
     erally are enclosure devices that provide environmental information such as number of power supplies (and state), temperature, device slots,
     and so on.

     A SCSI Host adapter must also be separately configured into the system before a SCSI Environmental Services device can be configured.

KERNEL CONFIGURATION

     It is only necessary to explicitly configure one ses device; data structures are dynamically allocated as devices are found on the SCSI bus.

     A separate option, SES_ENABLE_PASSTHROUGH, may be specified to allow the ses driver to perform functions on devices of other classes that
     claim to also support ses functionality.

IOCTLS

     The following ioctl(2) calls apply to ses devices.  They are defined in the header file <cam/scsi/scsi_ses.h> (q.v.).

     SESIOC_GETNOBJ	Used to find out how many ses objects are driven by this particular device instance.

     SESIOC_GETOBJMAP	Read, from the kernel, an array of SES objects which contains the object identifier, which subenclosure it is in, and the
			ses type of the object.

     SESIOC_GETENCSTAT	Get the overall enclosure status.

     SESIOC_SETENCSTAT	Set the overall enclosure status.

     SESIOC_GETOBJSTAT	Get the status of a particular object.

     SESIOC_SETOBJSTAT	Set the status of a particular object.

     SESIOC_GETTEXT	Get the associated help text for an object (not yet implemented).  ses devices often have descriptive text for an object
			which can tell you things like location (e.g., "left power supply").

     SESIOC_INIT	Initialize the enclosure.

EXAMPLE USAGE

     The files contained in <usr/share/examples/ses> show simple mechanisms for how to use these interfaces, as well as a very stupid simple moni-
     toring daemon.

FILES

     /dev/sesN	    The Nth SES device.

DIAGNOSTICS

     When the kernel is configured with DEBUG enabled, the first open to an SES device will spit out overall enclosure parameters to the console.

HISTORY

     The ses driver was written for the CAM SCSI subsystem by Matthew Jacob.  This is a functional equivalent of a similar driver available in
     Solaris, Release 7.

BSD
								 January 29, 2000							       BSD