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.\" Copyright (c) 2012, Joyent, Inc. All Rights Reserved
.\" Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
.\"
.TH IPMI 4D "Oct 31, 2013"
.SH NAME
ipmi \- OpenIPMI compatible IPMI interface driver
.SH SYNOPSIS
.nf
\fB/dev/ipmi0\fR
.fi

.SH DESCRIPTION
The \fBipmi\fR device is a character special file that provides access to the
Intelligent Platform Management Interface for the system.  For more
information on \fBIPMI\fR and to obtain a copy of the \fBIPMI\fR
specification and implementation guidelines, refer to
http://www.intel.com/design/servers/ipmi/.
The driver is adapted from the FreeBSD driver which is in turn adapted from
the Linux driver, however, not all features described in the standard are
supported. The current implementation depends on the \fBsmbios\fR(4D) to
discover the existence of an IPMI device.

.SH IOCTLS
Sending and receiving messages through the IPMI drivers requires the use of
\fBioctl\fR(2).

The ioctl command codes below are defined in \fBsys/ipmi.h\fR.
The third argument to ioctl should be a pointer to the type indicated.
Currently the following ioctls are supported:
.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_RECEIVE_MSG "struct ipmi_recv"
.br
Receive a message.
.br
Possible error values:
.RS +8
EAGAIN No messages are in the process queue.
.br
EFAULT An address supplied was invalid.
.br
EMSGSIZE The address could not fit in the message buffer and
will remain in the buffer.
.RE
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_RECEIVE_MSG_TRUNC "struct ipmi_recv"
.br
Like IPMICTL_RECEIVE_MSG but if the message cannot fit into the buffer, it
will truncate the contents instead of leaving the data in the buffer.
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_SEND_COMMAND "struct ipmi_req"
.br
Send a message to the interface.
.br
Possible error values:
.RS +8
EFAULT An address supplied was invalid
.br
ENOMEM Buffers could not be allowed for the command, out of memory.
.RE
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_SET_MY_ADDRESS_CMD "unsigned int"
.br
Set the slave address for source messages.
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_GET_MY_ADDRESS_CMD "unsigned int"
.br
Get the slave address for source messages.
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_SET_MY_LUN_CMD "unsigned int"
.br
Set the slave LUN for source messages.
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_GET_MY_LUN_CMD "unsigned int"
.br
Get the slave LUN for source messages.
.RE

Stub Only Ioctl

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_SET_GETS_EVENTS_CMD int
.br
Set whether this interface receives events.
.RE

Unimplemented Ioctls

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_REGISTER_FOR_CMD
.br
Register to receive a specific command
.RE

.RS +4
.TP
.ie t \(bu
.el o
IPMICTL_UNREGISTER_FOR_CMD
.br
Unregister to receive a specific command
.RE

.SH SEE ALSO
.BR ipmitool (1),
.BR ioctl (2),
.BR smbios (4D)
.sp
.LP
\fIIntelligent Platform Management Interface Specification Second
Generation\fR, v2.0 \(em
June 12, 2009 Markup
.SH NOTES
Not all systems include an \fBIPMI\fR.