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 generally
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 config

ured.

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 #include <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 ob

ject (not yet

implemented). ses devices often have de

scriptive 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 #include <usr/share/examples/ses> show simple mechanisms for how to use these interfaces, as

well as a very
stupid simple monitoring 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 avail

able in Solaris,
Release 7.

BSD January 29, 2000

BSD