ipmi: Update documentation
The documentation has some information that was old and needed some things added that are new. Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Родитель
56189b5f2f
Коммит
c11daf6a8f
|
@ -111,6 +111,8 @@ ipmi_ssif - A driver for accessing BMCs on the SMBus. It uses the
|
|||
I2C kernel driver's SMBus interfaces to send and receive IPMI messages
|
||||
over the SMBus.
|
||||
|
||||
ipmi_powernv - A driver for access BMCs on POWERNV systems.
|
||||
|
||||
ipmi_watchdog - IPMI requires systems to have a very capable watchdog
|
||||
timer. This driver implements the standard Linux watchdog timer
|
||||
interface on top of the IPMI message handler.
|
||||
|
@ -118,17 +120,15 @@ interface on top of the IPMI message handler.
|
|||
ipmi_poweroff - Some systems support the ability to be turned off via
|
||||
IPMI commands.
|
||||
|
||||
These are all individually selectable via configuration options.
|
||||
bt-bmc - This is not part of the main driver, but instead a driver for
|
||||
accessing a BMC-side interface of a BT interface. It is used on BMCs
|
||||
running Linux to provide an interface to the host.
|
||||
|
||||
Note that the KCS-only interface has been removed. The af_ipmi driver
|
||||
is no longer supported and has been removed because it was impossible
|
||||
to do 32 bit emulation on 64-bit kernels with it.
|
||||
These are all individually selectable via configuration options.
|
||||
|
||||
Much documentation for the interface is in the include files. The
|
||||
IPMI include files are:
|
||||
|
||||
net/af_ipmi.h - Contains the socket interface.
|
||||
|
||||
linux/ipmi.h - Contains the user interface and IOCTL interface for IPMI.
|
||||
|
||||
linux/ipmi_smi.h - Contains the interface for system management interfaces
|
||||
|
@ -245,6 +245,16 @@ addressed (because some boards actually have multiple BMCs on them)
|
|||
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
|
||||
the device is detected, or you might be able to do it immediately.
|
||||
To handle this, and to allow for discovery, you register an SMI
|
||||
watcher with ipmi_smi_watcher_register() to iterate over interfaces
|
||||
and tell you when they come and go.
|
||||
|
||||
|
||||
Creating the User
|
||||
|
||||
To user the message handler, you must first create a user using
|
||||
|
@ -263,7 +273,7 @@ closing the device automatically destroys the user.
|
|||
|
||||
Messaging
|
||||
|
||||
To send a message from kernel-land, the ipmi_request() call does
|
||||
To send a message from kernel-land, the ipmi_request_settime() call does
|
||||
pretty much all message handling. Most of the parameter are
|
||||
self-explanatory. However, it takes a "msgid" parameter. This is NOT
|
||||
the sequence number of messages. It is simply a long value that is
|
||||
|
@ -352,11 +362,12 @@ that for more details.
|
|||
The SI Driver
|
||||
-------------
|
||||
|
||||
The SI driver allows up to 4 KCS or SMIC interfaces to be configured
|
||||
in the system. By default, scan the ACPI tables for interfaces, and
|
||||
if it doesn't find any the driver will attempt to register one KCS
|
||||
interface at the spec-specified I/O port 0xca2 without interrupts.
|
||||
You can change this at module load time (for a module) with:
|
||||
The SI driver allows KCS, BT, and SMIC interfaces to be configured
|
||||
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:
|
||||
|
||||
modprobe ipmi_si.o type=<type1>,<type2>....
|
||||
ports=<port1>,<port2>... addrs=<addr1>,<addr2>...
|
||||
|
@ -367,7 +378,7 @@ You can change this at module load time (for a module) with:
|
|||
force_kipmid=<enable1>,<enable2>,...
|
||||
kipmid_max_busy_us=<ustime1>,<ustime2>,...
|
||||
unload_when_empty=[0|1]
|
||||
trydefaults=[0|1] trydmi=[0|1] tryacpi=[0|1]
|
||||
trydmi=[0|1] tryacpi=[0|1]
|
||||
tryplatform=[0|1] trypci=[0|1]
|
||||
|
||||
Each of these except try... items is a list, the first item for the
|
||||
|
@ -386,10 +397,6 @@ use the I/O port given as the device address.
|
|||
If you specify irqs as non-zero for an interface, the driver will
|
||||
attempt to use the given interrupt for the device.
|
||||
|
||||
trydefaults sets whether the standard IPMI interface at 0xca2 and
|
||||
any interfaces specified by ACPE are tried. By default, the driver
|
||||
tries it, set this value to zero to turn this off.
|
||||
|
||||
The other try... items disable discovery by their corresponding
|
||||
names. These are all enabled by default, set them to zero to disable
|
||||
them. The tryplatform disables openfirmware.
|
||||
|
@ -434,7 +441,7 @@ kernel command line as:
|
|||
|
||||
ipmi_si.type=<type1>,<type2>...
|
||||
ipmi_si.ports=<port1>,<port2>... ipmi_si.addrs=<addr1>,<addr2>...
|
||||
ipmi_si.irqs=<irq1>,<irq2>... ipmi_si.trydefaults=[0|1]
|
||||
ipmi_si.irqs=<irq1>,<irq2>...
|
||||
ipmi_si.regspacings=<sp1>,<sp2>,...
|
||||
ipmi_si.regsizes=<size1>,<size2>,...
|
||||
ipmi_si.regshifts=<shift1>,<shift2>,...
|
||||
|
@ -444,11 +451,6 @@ kernel command line as:
|
|||
|
||||
It works the same as the module parameters of the same names.
|
||||
|
||||
By default, the driver will attempt to detect any device specified by
|
||||
ACPI, and if none of those then a KCS device at the spec-specified
|
||||
0xca2. If you want to turn this off, set the "trydefaults" option to
|
||||
false.
|
||||
|
||||
If your IPMI interface does not support interrupts and is a KCS or
|
||||
SMIC interface, the IPMI driver will start a kernel thread for the
|
||||
interface to help speed things up. This is a low-priority kernel
|
||||
|
@ -500,7 +502,8 @@ at module load time (for a module) with:
|
|||
addr=<i2caddr1>[,<i2caddr2>[,...]]
|
||||
adapter=<adapter1>[,<adapter2>[...]]
|
||||
dbg=<flags1>,<flags2>...
|
||||
slave_addrs=<addr1>,<addr2>,...
|
||||
slave_addrs=<addr1>,<addr2>,...
|
||||
tryacpi=[0|1] trydmi=[0|1]
|
||||
[dbg_probe=1]
|
||||
|
||||
The addresses are normal I2C addresses. The adapter is the string
|
||||
|
@ -513,6 +516,9 @@ spaces in kernel parameters.
|
|||
The debug flags are bit flags for each BMC found, they are:
|
||||
IPMI messages: 1, driver state: 2, timing: 4, I2C probe: 8
|
||||
|
||||
The tryxxx parameters can be used to disable detecting interfaces
|
||||
from various sources.
|
||||
|
||||
Setting dbg_probe to 1 will enable debugging of the probing and
|
||||
detection process for BMCs on the SMBusses.
|
||||
|
||||
|
@ -535,7 +541,8 @@ kernel command line as:
|
|||
ipmi_ssif.adapter=<adapter1>[,<adapter2>[...]]
|
||||
ipmi_ssif.dbg=<flags1>[,<flags2>[...]]
|
||||
ipmi_ssif.dbg_probe=1
|
||||
ipmi_ssif.slave_addrs=<addr1>[,<addr2>[...]]
|
||||
ipmi_ssif.slave_addrs=<addr1>[,<addr2>[...]]
|
||||
ipmi_ssif.tryacpi=[0|1] ipmi_ssif.trydmi=[0|1]
|
||||
|
||||
These are the same options as on the module command line.
|
||||
|
||||
|
|
Загрузка…
Ссылка в новой задаче