I found this information in OpenIPMI website :
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.
What does it mean ? Why did it not find any interface ?
On 08/01/2011 10:16 AM, Bob Sauvage wrote:
Hi Corey,
Thanks again for your help.
When I try to hot-add the device, I have the following error in the
kernel log :
Aug 1 10:13:13 kernel: ipmi_si: Adding hotmod-specified kcs state
machine
Aug 1 10:13:13 kernel: ipmi_si: Trying hotmod-specified kcs state
machine at i/o address 0xca2, slave address 0x20, irq 0
Aug 1 10:13:13 kernel: ipmi_si: Interface detection failed
When I try the other solution, it does not work.
Any other ideas ?
On 07/29/2011 03:57 PM, Corey Minyard wrote:
On 07/29/2011 03:50 AM, Bob Sauvage wrote:
Hello Jan and Corey,
First of all, thanks for the provided information.
The ipmi service is started :
*service ipmi status*
ipmi_msghandler module loaded.
ipmi_si module loaded.
ipmi_devintf module loaded.
/dev/ipmi0 does not exist.
*Modules are loaded : *
Module Size Used by
ipmi_devintf 7983 0
ipmi_si 42399 0
ipmi_msghandler 35958 2 ipmi_devintf,ipmi_si
*dmidecode :*
System Information
Manufacturer: Supermicro
Product Name: X8SIL
IPMI Device Information
Interface Type: KCS (Keyboard Control Style)
Specification Version: 2.0
I2C Slave Address: 0x00
NV Storage Device: Not Present
Base Address: 0x0000000000000CA2 (Memory-mapped)
Register Spacing: Successive Byte Boundaries
*Kernel log : *
jul 29 10:39:32 kernel: ipmi message handler version 39.2
Jul 29 10:39:32 kernel: IPMI System Interface driver.
Jul 29 10:39:32 kernel: ipmi_si: Adding SMBIOS-specified kcs state
machine
Jul 29 10:39:32 kernel: ipmi_si: Trying SMBIOS-specified kcs state
machine at mem address 0xca2, slave address 0x0, irq 0
Jul 29 10:39:32 kernel: Could not set up I/O space
This is the issue. It looks like a bug in your DMI information.
Notice that it say the address is 0xca2 and it is memory mapped.
That is almost certainly wrong, as you would never have a memory
mapped device at that address. It's almost certainly I/O mapped.
You can attempt to work around this by specifying "type=kcs
ports=0xca2" when modprob-ing ipmi_si:
rmmod ipmi_si
modprobe ipmi_si type=kcs ports=0xca2
Alternately, you can hot-add the device to the running driver using:
echo "add,kcs,i/o,0xca2" >/sys/module/ipmi_si/parameters/hotmod
And of course, you can complain to your motherboard vendor.
-corey
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