Data Sheet

Ethernet Controller I210 —System Manageability
664
Where TCO Mode is:
Note: Only one of the fields should be set in a given command. Setting more than one field may
yield unexpected results.
10.5.9.1.5 Management Control
This command is used to set generic manageability parameters. The parameters list is shown in
Table 10-11. The command is 0xC1 stating that it is a Management Control command. The first data
byte is the parameter number and the data afterwards (length and content) are parameter specific as
shown in Management Control Command Parameters/Content.
Note: If the parameter that the MC sets is not supported by the I210. The I210 does not NACK the
transaction. After the transaction ends, the I210 discards the data and asserts a transaction
abort status.
The Management Control command format is as follows:
Field Bit(s) Description
DO_TCO_RST 0
Perform TCO Reset.
0b: Do nothing.
1b: Perform TCO reset.
DO_TCO_ISOLATE
1
1. TCO Isolate Host Write operation enabled in Flash.
1
Do TCO Isolate
0b = Enable PCIe write access to LAN port.
1b = Isolate Host PCIe write operation to the port
Note: Should be used for debug only.
RESET_MGMT 2
Reset manageability; re-load manageability Flash words.
0b = Do nothing
1b = Issue firmware reset to manageability.
Setting this bit generates a one-time firmware reset. Following the reset, management
related data from Flash is loaded.
Reserved 7:3 Reserved (set to 0x00).
Function Command Byte Count Data 1 Data 2 … Data N
Management Control 0xC1 N
Parameter
Number
Parameter Dependent
Table 10-11. Management Control Command Parameters/Content
Parameter # Parameter Data
Keep PHY Link Up 0x00
A single byte parameter:
Data 2:
Bit 0: Set to indicate that the PHY link for this port should be kept up throughout
system resets. This is useful when the server is reset and the MC needs to keep
connectivity for a manageability session.
Bit [7:1] Reserved.
0b: Disabled.
1b: Enabled.