Broadcom NetXtreme/NetLink BCM5718 Series

Table of ContentsBCM5718 Programmer’s Guide
Broadcom
®
January 29, 2016 • 5718-PG108-R Page 14
Setup of Producer Rings Using RCBs................................................................................................... 90
Receive Producer Ring RCB—Register Offset 0x2450–0x245f .................................................... 90
Other Considerations Relating to Producer Ring Setup......................................................... 90
RCB Setup Pseudo Code .............................................................................................................. 91
Receive Buffer Descriptors.................................................................................................................... 91
Management of Rx Producer Rings with Mailbox Registers and Status Block ..................................... 92
Status Block ................................................................................................................................... 92
Mailbox........................................................................................................................................... 92
Receive BD Producer Ring Producer Index........................................................................... 92
Receive Return Rings ................................................................................................................................93
Management of Return Rings with Mailbox Registers and Status Block .............................................. 94
Host Buffer Allocation............................................................................................................................ 94
Receive Rules Setup and Frame Classification ....................................................................................95
Receive Rules Configuration Register ........................................................................................... 95
Receive List Placement Rules Array..............................................................................................96
Class of Service Example .............................................................................................................. 97
Checksum Calculation............................................................................................................................... 98
VLAN Tag Strip........................................................................................................................................... 98
RX Data Flow Diagram ............................................................................................................................. 100
Receive Side Scaling................................................................................................................................101
Overview ............................................................................................................................................. 101
Functional Description......................................................................................................................... 101
RSS Parameters ................................................................................................................................. 102
Hash Function .............................................................................................................................. 102
Hash Type.................................................................................................................................... 102
Hash Mask ................................................................................................................................... 102
Indirection Table........................................................................................................................... 103
Secret Hash Key .......................................................................................................................... 103
RSS Initialization ................................................................................................................................. 103
RSS Rx Packet Flow ........................................................................................................................... 104
Section 6: Transmit Data Flow ....................................................................................... 105
Introduction............................................................................................................................................... 105
Send Rings................................................................................................................................................ 105
Ring Control Block............................................................................................................................... 107
Host-Based Send Ring........................................................................................................................ 108
Checksum Offload.................................................................................................................................... 109
Large Segment Offload............................................................................................................................ 110
QuickStart............................................................................................................................................ 110
LSO-Related Hardware Control Bits ................................................................................................... 111