Data Sheet

Ethernet Controller I210 —Interconnects

3.1.4.3.2 Message Handling by I210 (as a Transmitter)

The transaction layer is also responsible for transmitting specific messages to report internal/external

events (such as interrupts and PMEs).

3.1.4.3.3 Vendor Defined Messages (VDM)

The following vendor defined messages are supported:

•DMTF MCTP

3.1.4.3.3.1 MCTP VDMs

MCTP VDMs are supported as both master and target. The following header fields are involved (see

Figure 3-2):

• Fmt - Set to 11b to indicate a 4 Dword header with data

•Type

— [4:3] set to 10b to indicate a message

— [2:0] routing r2r1r0 = 000b, 010b or 011b

• Traffic class - Set to 000b

• TLP digest - Set to 0b (no ECRC) unless the ECRC Generation for MCTP in PCIe Control 2 Flash word

is set and ECRC generation is enabled.

• Error present - Set to 0b

• Attributes[1:0] - Set to 01b (no snoop)

• Tag field - Indicates this is an MCTP packet and the size of padding to dword alignment added

• Message code = 0x7F (Type 1 VDM)

• Destination ID - captures the target B/D/F for route by ID. Otherwise, reserved

• Vendor ID = 0x1AB4 (DMTF)

Table 3-7. Supported Message in the I210 (as a Transmitter)

Message code

[7:0]

Routing r2r1r0 Message

0x20 100 Assert INT A

0x21 100 Not used

0x22 100 Not used

0x23 100 Not used

0x24 100 Deassert INT A

0x25 100 Not used

0x26 100 Not used

0x27 100 Not used

0x30 000 ERR_COR

0x31 000 ERR_NONFATAL

0x33 000 ERR_FATAL

0x18 000 PM_PME

0x1B 101 PME_TO_ACK

0x10 100 Latency Tolerance Reporting (LTR)

0x7F 000, 010, 011, VDM (see Section 3.1.4.3.3)