WG82574IT S LBAB Intel, WG82574IT S LBAB Datasheet - Page 123
WG82574IT S LBAB
Manufacturer Part Number
WG82574IT S LBAB
Description
Manufacturer
Intel
Datasheet
1.WG82574IT_S_LBAB.pdf
(472 pages)
Specifications of WG82574IT S LBAB
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
64
Lead Free Status / RoHS Status
Compliant
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Inline Functions—82574 GbE Controller
7.1.4.1
7.1.4.2
Note:
7.1.4.3
Buffer Address (64-Bit, Offset 0.0)
The field contains the physical address of the receive data buffer. The size of the buffer
is defined by the RCTL register (RCTL.BSIZE, RCTL.BSEX, RCTL.DTYP and RCTL.
FLXBUF fields).
DD (1-Bit, Offset 8.0)
This is the location of the DD bit in the Status field. The software device driver must
clear this bit before it handles the receive descriptor to the 82574. The software device
driver can use this bit field later on as a completion indication of the hardware.
Descriptor Write-Back Format:
Light-blue fields are mutually exclusive by RXCSUM.PCSD
MRQ Field (32-Bit, Offset 0.0)
RSS Type Decoding:
The RSS Type field represents the hash type used by the RSS function.
RSS Type
Reserved
Queue
Reserved
0x0
0x1
0x2
0x3
0x4
0x5
0x6-0xF
0
8
Packet Type
Field
63
Packet Checksum
VLAN Tag
3:0
7:4
12:8
31:13
Bit(s)
No hash computation done for this packet.
IPv4 with TCP hash used (NdisTcpIPv4).
IPv4 hash used (NdisIPv4).
IPv6 with TCP hash used (NdisTcpIPv6).
IPv6 with extension header hash used (NdisIPv6Ex).
IPv6 hash used (NdisIPv6).
Reserved
Reserved
RSS Type
Indicates the type of hash function used for RSS computation (see below).
Indicates the receive queue associated with the packet. It is generated by the
redirection table as defined by the Multiple Receive Queues Enable field.
This field is reserved when Multiple Receive Queues are disabled.
Reserved
48
RSS Hash
47
IP Identification
Length
32
Description
31
Extended Error
Description
20
19
MRQ
Extended Status
123
0
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