Data Sheet

Inline Functions—Ethernet Controller I210
263
7.1.2.10.1.1 Hash for IPv4 with TCP
Concatenate SourceAddress, DestinationAddress, SourcePort, DestinationPort into one single byte-
array, preserving the order in which they occurred in the packet:
Input[12] = @12-15, @16-19, @20-21, @22-23.
Result = ComputeHash(Input, 12);
7.1.2.10.1.2 Hash for IPv4 with UDP
Concatenate SourceAddress, DestinationAddress, SourcePort, DestinationPort into one single byte-
array, preserving the order in which they occurred in the packet:
Input[12] = @12-15, @16-19, @20-21, @22-23.
Result = ComputeHash(Input, 12);
7.1.2.10.1.3 Hash for IPv4 without TCP
Concatenate SourceAddress and DestinationAddress into one single byte-array
Input[8] = @12-15, @16-19
Result = ComputeHash(Input, 8)
7.1.2.10.1.4 Hash for IPv6 with TCP
Similar to above:
Input[36] = @8-23, @24-39, @40-41, @42-43
Result = ComputeHash(Input, 36)
7.1.2.10.1.5 Hash for IPv6 with UDP
Similar to above:
Input[36] = @8-23, @24-39, @40-41, @42-43
Result = ComputeHash(Input, 36)
7.1.2.10.1.6 Hash for IPv6 without TCP
Input[32] = @8-23, @24-39
Result = ComputeHash(Input, 32)
7.1.2.10.2 Indirection Table
The RETA indirection table is a 128-entry structure, indexed by the seven LSB bits of the hash function
output. Each entry of the table contains the following:
• Bits [2:0] - RSS index
Note: In RSS only mode, all 3 bits are used. In VMDq mode RSS is not supported.
System software might update the indirection table during run time. Such updates of the table are not
synchronized with the arrival time of received packets. Therefore, it is not guaranteed that a table
update takes effect on a specific packet boundary.
7.1.2.10.3 RSS Verification Suite