The host needs the ability to send to the BMC, the margin information on the devices that it knows how to read that the BMC cannot. There is no command in IPMI that currently supports this use-case, therefore it will be added as an OEM command.
The state of the BMC readable temperature sensors can be read through normal IPMI commands and is already supported.
A host tool needs to be able to set the control of the thermal system to either automatic or manual. When manual, the daemon will effectively wait to be told to be put back in automatic mode. It is expected in this manual mode that something will be controlling the fans via the other commands.
Manual mode is controlled by zone through the following OEM command:
| Byte | Purpose | Value |
|---|---|---|
00 | netfn | 0x2e |
01 | command | 0x04 (also using manual command) |
02 | oem1 | 0xcf |
03 | oem2 | 0xc2 |
04 | padding | 0x00 |
05 | SubCommand | Get or Set. Get == 0, Set == 1 |
06 | ZoneId | |
07 | Mode | If Set, Value 1 == Manual Mode, 0 == Automatic Mode |
| Byte | Purpose | Value |
|---|---|---|
02 | oem1 | 0xcf |
03 | oem2 | 0xc2 |
04 | padding | 0x00 |
07 | Mode | If Set, Value 1 == Manual Mode, 0 == Automatic Mode |
A host tool needs to be able to read back whether a zone is in failsafe mode. This setting is read-only because it's dynamically determined within Swampd per zone.
| Byte | Purpose | Value |
|---|---|---|
00 | netfn | 0x2e |
01 | command | 0x04 (also using manual command) |
02 | oem1 | 0xcf |
03 | oem2 | 0xc2 |
04 | padding | 0x00 |
05 | SubCommand | Get == 2 |
06 | ZoneId |
| Byte | Purpose | Value |
|---|---|---|
02 | oem1 | 0xcf |
03 | oem2 | 0xc2 |
04 | padding | 0x00 |
07 | failsafe | 1 == in Failsafe Mode, 0 not in failsafe mode |