82583V Datasheet, PDF (89/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Interconnects—82583V GbE Controller
6.1.5
6.1.5.1
Table 30.
Host I/F
Tag IDs
PCIe device numbers identify logical devices within the physical device (the 82583V is a
physical device). The 82583V implements a single logical device with one PCI function -
LAN. The device number is captured from each type 0 configuration write transaction.
Each of the PCIe functions interface with the PCIe unit through one or more clients. A
client ID identifies the client and is included in the Tag field of the PCIe packet header.
Completions always carry the tag value included in the request to enable routing of the
completion to the appropriate client.
Client IDs are assigned as follows:
Assignment of Client IDs
TAG Code
in Hex
00
01
02
04
05
07:06
08
09
0A
0B
0C
0E
11:10
1E
1F
Others
Flow: TLP TYPE – Usage
RX: WR REQ (data from Ethernet to main memory)
RX: RD REQ to read descriptor to core
RX: WR REQ to write back descriptor from core to memory
TX: RD REQ to read descriptor to core
TX: WR REQ to write back descriptor from core to memory
Reserved
TX: RD REQ data 0 from main memory to Ethernet
TX: RD REQ data 1 from main memory to Ethernet
TX: RD REQ data 2 from main memory to Ethernet
TX: RD REQ data 3 from main memory to Ethernet
Reserved
Reserved
Reserved
MSI
Message unit
Reserved
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