82583V Datasheet, PDF (120/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

82583V GbE Controller—Inline Functions
7.1.4.5
IP Identification (16-Bit, Offset 0.32)
This field stores the IP Identification field in the IP header of the incoming packet. The
software device driver should ignore this field when IPIDV is not set.
7.1.4.6
Extended Status (20-Bit, Offset 8.0)
9
8
7
6
5
4
3
2
1
0
IPIDV
TST
Rsvd
IPCS
TCPCS UDPCS
VP
Rsvd
EOP
DD
19
18
17
16
15
14
13
12
11
10
PKTTYPE
ACK
Reserved
UDPV
PKTTYPE (bits 19:16) - Packet type
ACK (bit 15) - ACK packet indication
Reserved (bits 14:11) - Reserved
UDPV (bit 10) - Valid UDP XSUM
IPIDV (bit 9) - IP identification valid
TST (bit 8) - Time stamp taken
Rsvd (bit 7) - Reserved
IPCS (bit 6) IPv4 checksum calculated on packet - same as legacy descriptor.
TCPCS (bit 5) - TCP checksum calculated on packet - same as legacy descriptor.
UDPCS (bit 4) - UDP checksum calculated on packet.
VP (bit 3) - Packet is 802.1q (matched VET) - same as legacy descriptor.
Rsv (bit 2) - Reserved
EOP (bit 1) - End of packet - same as legacy descriptor.
DD (bit 0) - Descriptor done - same as legacy descriptor.
DD EOP IXSM VP UDPCS TCPCS IPCS: Same meaning as in the legacy receive
descriptor.
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