Broadcom NetXtreme/NetLink BCM5718 Series

Table of ContentsBCM5718 Programmer’s Guide
Broadcom
®
January 29, 2016 • 5718-PG108-R Page 13
Auto-Negotiation.................................................................................................................................... 62
Automatic MDI Crossover ..................................................................................................................... 62
PHY Control ................................................................................................................................................ 62
MII Block................................................................................................................................................ 62
GMII Block............................................................................................................................................. 64
MDIO Register Interface........................................................................................................................ 66
Management Data Clock................................................................................................................ 66
Management Data Input/Output..................................................................................................... 66
Management Data Interrupt ........................................................................................................... 66
Management Register Block .......................................................................................................... 66
Section 3: NVRAM Configuration.....................................................................................67
Overview...................................................................................................................................................... 67
Self-Boot...................................................................................................................................................... 68
Section 4: Common Data Structures...............................................................................69
Theory of Operation................................................................................................................................... 69
Descriptor Rings......................................................................................................................................... 69
Producer and Consumer Indices........................................................................................................... 70
Ring Control Blocks............................................................................................................................... 71
Send Ring Control Blocks .............................................................................................................. 71
Receive Ring Control Blocks.......................................................................................................... 72
Send Rings............................................................................................................................................ 73
Send Buffer Descriptors................................................................................................................. 75
Standard (Not Large Segment Offload) ................................................................................. 75
Large Segment Offload (LSO) Send BD................................................................................ 76
Receive Rings ....................................................................................................................................... 77
Receive Producer Ring .................................................................................................................. 77
Receive Return Rings .................................................................................................................... 78
Receive Buffer Descriptors ............................................................................................................ 78
Additional Ring Information for the BCM5718 Family .................................................................... 81
Status Block................................................................................................................................................ 82
Status Block Format.............................................................................................................................. 82
INTx/MSI — Legacy Mode Status Block Format ............................................................................ 83
Single-Vector or INTx — RSS Mode Status Block Format ............................................................. 84
Multivector RSS Mode Status Block Format .................................................................................. 85
Status Block and INT MailBox Addresses...................................................................................... 86
Section 5: Receive Data Flow........................................................................................... 88
Introduction................................................................................................................................................. 88
Receive Producer Ring .............................................................................................................................. 90