82598EB Datasheet, PDF (56/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - PCIe
3.1.1.3.1 Tag ID Allocation
Tag IDs are allocated differently for read and write functions.
1. Tag ID allocation for read accesses. The Tag ID is used by hardware in order to be able to forward
the read data to the required internal client.
TAG ID
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
0x10
0x11
0x12
0x13
0x14
0x15
Description
Data Request 0x0
Data Request 0x1
Data Request 0x2
Data Request 0x3
Data Request 0x4
Data Request 0x5
Data Request 0x6
Data Request 0x7
Data Request 0x8
Data Request 0x9
Data Request 0xA
Data Request 0xB
Data Request 0xC
Data Request 0xD
Data Request 0xE
Data Request 0xF
Tx Descriptor 0
Tx Descriptor 1
Tx Descriptor 2
Tx Descriptor 3
Tx Descriptor 4
Tx Descriptor 5
56