IPMI.txt: standardize document format
Each text file under Documentation follows a different format. Some doesn't even have titles! Change its representation to follow the adopted standard, using ReST markups for it to be parseable by Sphinx: - fix document type; - add missing markups for subitems; - mark literal blocks; - add whitespaces and blank lines where needed; - use bulleted list markups where neded. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab
Jonathan Corbet
parent
877b638ff8
commit
f5981a5c59
1 changed files with 44 additions and 32 deletions
|
|
@ -1,9 +1,8 @@
|
|||
=====================
|
||||
The Linux IPMI Driver
|
||||
=====================
|
||||
|
||||
The Linux IPMI Driver
|
||||
---------------------
|
||||
Corey Minyard
|
||||
<minyard@mvista.com>
|
||||
<minyard@acm.org>
|
||||
:Author: Corey Minyard <minyard@mvista.com> / <minyard@acm.org>
|
||||
|
||||
The Intelligent Platform Management Interface, or IPMI, is a
|
||||
standard for controlling intelligent devices that monitor a system.
|
||||
|
|
@ -141,7 +140,7 @@ Addressing
|
|||
----------
|
||||
|
||||
The IPMI addressing works much like IP addresses, you have an overlay
|
||||
to handle the different address types. The overlay is:
|
||||
to handle the different address types. The overlay is::
|
||||
|
||||
struct ipmi_addr
|
||||
{
|
||||
|
|
@ -153,7 +152,7 @@ to handle the different address types. The overlay is:
|
|||
The addr_type determines what the address really is. The driver
|
||||
currently understands two different types of addresses.
|
||||
|
||||
"System Interface" addresses are defined as:
|
||||
"System Interface" addresses are defined as::
|
||||
|
||||
struct ipmi_system_interface_addr
|
||||
{
|
||||
|
|
@ -166,7 +165,7 @@ straight to the BMC on the current card. The channel must be
|
|||
IPMI_BMC_CHANNEL.
|
||||
|
||||
Messages that are destined to go out on the IPMB bus use the
|
||||
IPMI_IPMB_ADDR_TYPE address type. The format is
|
||||
IPMI_IPMB_ADDR_TYPE address type. The format is::
|
||||
|
||||
struct ipmi_ipmb_addr
|
||||
{
|
||||
|
|
@ -184,16 +183,16 @@ spec.
|
|||
Messages
|
||||
--------
|
||||
|
||||
Messages are defined as:
|
||||
Messages are defined as::
|
||||
|
||||
struct ipmi_msg
|
||||
{
|
||||
struct ipmi_msg
|
||||
{
|
||||
unsigned char netfn;
|
||||
unsigned char lun;
|
||||
unsigned char cmd;
|
||||
unsigned char *data;
|
||||
int data_len;
|
||||
};
|
||||
};
|
||||
|
||||
The driver takes care of adding/stripping the header information. The
|
||||
data portion is just the data to be send (do NOT put addressing info
|
||||
|
|
@ -208,7 +207,7 @@ block of data, even when receiving messages. Otherwise the driver
|
|||
will have no place to put the message.
|
||||
|
||||
Messages coming up from the message handler in kernelland will come in
|
||||
as:
|
||||
as::
|
||||
|
||||
struct ipmi_recv_msg
|
||||
{
|
||||
|
|
@ -246,6 +245,7 @@ and the user should not have to care what type of SMI is below them.
|
|||
|
||||
|
||||
Watching For Interfaces
|
||||
^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
When your code comes up, the IPMI driver may or may not have detected
|
||||
if IPMI devices exist. So you might have to defer your setup until
|
||||
|
|
@ -256,6 +256,7 @@ and tell you when they come and go.
|
|||
|
||||
|
||||
Creating the User
|
||||
^^^^^^^^^^^^^^^^^
|
||||
|
||||
To use the message handler, you must first create a user using
|
||||
ipmi_create_user. The interface number specifies which SMI you want
|
||||
|
|
@ -272,6 +273,7 @@ closing the device automatically destroys the user.
|
|||
|
||||
|
||||
Messaging
|
||||
^^^^^^^^^
|
||||
|
||||
To send a message from kernel-land, the ipmi_request_settime() call does
|
||||
pretty much all message handling. Most of the parameter are
|
||||
|
|
@ -321,6 +323,7 @@ though, since it is tricky to manage your own buffers.
|
|||
|
||||
|
||||
Events and Incoming Commands
|
||||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
||||
The driver takes care of polling for IPMI events and receiving
|
||||
commands (commands are messages that are not responses, they are
|
||||
|
|
@ -367,7 +370,7 @@ in the system. It discovers interfaces through a host of different
|
|||
methods, depending on the system.
|
||||
|
||||
You can specify up to four interfaces on the module load line and
|
||||
control some module parameters:
|
||||
control some module parameters::
|
||||
|
||||
modprobe ipmi_si.o type=<type1>,<type2>....
|
||||
ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
|
||||
|
|
@ -437,7 +440,7 @@ default is one. Setting to 0 is useful with the hotmod, but is
|
|||
obviously only useful for modules.
|
||||
|
||||
When compiled into the kernel, the parameters can be specified on the
|
||||
kernel command line as:
|
||||
kernel command line as::
|
||||
|
||||
ipmi_si.type=<type1>,<type2>...
|
||||
ipmi_si.ports=<port1>,<port2>... ipmi_si.addrs=<addr1>,<addr2>...
|
||||
|
|
@ -474,16 +477,22 @@ The driver supports a hot add and remove of interfaces. This way,
|
|||
interfaces can be added or removed after the kernel is up and running.
|
||||
This is done using /sys/modules/ipmi_si/parameters/hotmod, which is a
|
||||
write-only parameter. You write a string to this interface. The string
|
||||
has the format:
|
||||
has the format::
|
||||
|
||||
<op1>[:op2[:op3...]]
|
||||
The "op"s are:
|
||||
|
||||
The "op"s are::
|
||||
|
||||
add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
|
||||
You can specify more than one interface on the line. The "opt"s are:
|
||||
|
||||
You can specify more than one interface on the line. The "opt"s are::
|
||||
|
||||
rsp=<regspacing>
|
||||
rsi=<regsize>
|
||||
rsh=<regshift>
|
||||
irq=<irq>
|
||||
ipmb=<ipmb slave addr>
|
||||
|
||||
and these have the same meanings as discussed above. Note that you
|
||||
can also use this on the kernel command line for a more compact format
|
||||
for specifying an interface. Note that when removing an interface,
|
||||
|
|
@ -496,7 +505,7 @@ The SMBus Driver (SSIF)
|
|||
The SMBus driver allows up to 4 SMBus devices to be configured in the
|
||||
system. By default, the driver will only register with something it
|
||||
finds in DMI or ACPI tables. You can change this
|
||||
at module load time (for a module) with:
|
||||
at module load time (for a module) with::
|
||||
|
||||
modprobe ipmi_ssif.o
|
||||
addr=<i2caddr1>[,<i2caddr2>[,...]]
|
||||
|
|
@ -535,7 +544,7 @@ the smb_addr parameter unless you have DMI or ACPI data to tell the
|
|||
driver what to use.
|
||||
|
||||
When compiled into the kernel, the addresses can be specified on the
|
||||
kernel command line as:
|
||||
kernel command line as::
|
||||
|
||||
ipmb_ssif.addr=<i2caddr1>[,<i2caddr2>[...]]
|
||||
ipmi_ssif.adapter=<adapter1>[,<adapter2>[...]]
|
||||
|
|
@ -565,9 +574,9 @@ Some users need more detailed information about a device, like where
|
|||
the address came from or the raw base device for the IPMI interface.
|
||||
You can use the IPMI smi_watcher to catch the IPMI interfaces as they
|
||||
come or go, and to grab the information, you can use the function
|
||||
ipmi_get_smi_info(), which returns the following structure:
|
||||
ipmi_get_smi_info(), which returns the following structure::
|
||||
|
||||
struct ipmi_smi_info {
|
||||
struct ipmi_smi_info {
|
||||
enum ipmi_addr_src addr_src;
|
||||
struct device *dev;
|
||||
union {
|
||||
|
|
@ -575,7 +584,7 @@ struct ipmi_smi_info {
|
|||
void *acpi_handle;
|
||||
} acpi_info;
|
||||
} addr_info;
|
||||
};
|
||||
};
|
||||
|
||||
Currently special info for only for SI_ACPI address sources is
|
||||
returned. Others may be added as necessary.
|
||||
|
|
@ -590,7 +599,7 @@ Watchdog
|
|||
|
||||
A watchdog timer is provided that implements the Linux-standard
|
||||
watchdog timer interface. It has three module parameters that can be
|
||||
used to control it:
|
||||
used to control it::
|
||||
|
||||
modprobe ipmi_watchdog timeout=<t> pretimeout=<t> action=<action type>
|
||||
preaction=<preaction type> preop=<preop type> start_now=x
|
||||
|
|
@ -635,7 +644,7 @@ watchdog device is closed. The default value of nowayout is true
|
|||
if the CONFIG_WATCHDOG_NOWAYOUT option is enabled, or false if not.
|
||||
|
||||
When compiled into the kernel, the kernel command line is available
|
||||
for configuring the watchdog:
|
||||
for configuring the watchdog::
|
||||
|
||||
ipmi_watchdog.timeout=<t> ipmi_watchdog.pretimeout=<t>
|
||||
ipmi_watchdog.action=<action type>
|
||||
|
|
@ -675,6 +684,7 @@ also get a bunch of OEM events holding the panic string.
|
|||
|
||||
|
||||
The field settings of the events are:
|
||||
|
||||
* Generator ID: 0x21 (kernel)
|
||||
* EvM Rev: 0x03 (this event is formatting in IPMI 1.0 format)
|
||||
* Sensor Type: 0x20 (OS critical stop sensor)
|
||||
|
|
@ -683,18 +693,20 @@ The field settings of the events are:
|
|||
* Event Data 1: 0xa1 (Runtime stop in OEM bytes 2 and 3)
|
||||
* Event data 2: second byte of panic string
|
||||
* Event data 3: third byte of panic string
|
||||
|
||||
See the IPMI spec for the details of the event layout. This event is
|
||||
always sent to the local management controller. It will handle routing
|
||||
the message to the right place
|
||||
|
||||
Other OEM events have the following format:
|
||||
Record ID (bytes 0-1): Set by the SEL.
|
||||
Record type (byte 2): 0xf0 (OEM non-timestamped)
|
||||
byte 3: The slave address of the card saving the panic
|
||||
byte 4: A sequence number (starting at zero)
|
||||
The rest of the bytes (11 bytes) are the panic string. If the panic string
|
||||
is longer than 11 bytes, multiple messages will be sent with increasing
|
||||
sequence numbers.
|
||||
|
||||
* Record ID (bytes 0-1): Set by the SEL.
|
||||
* Record type (byte 2): 0xf0 (OEM non-timestamped)
|
||||
* byte 3: The slave address of the card saving the panic
|
||||
* byte 4: A sequence number (starting at zero)
|
||||
The rest of the bytes (11 bytes) are the panic string. If the panic string
|
||||
is longer than 11 bytes, multiple messages will be sent with increasing
|
||||
sequence numbers.
|
||||
|
||||
Because you cannot send OEM events using the standard interface, this
|
||||
function will attempt to find an SEL and add the events there. It
|
||||
|
|
|
|||
Loading…
Reference in a new issue