Figure 30: Transmit Data Flow - Broadcom NetXtreme/NetLink BCM5718 Series Programmer's Manual

BCM5718 Programmer's Guide
Figure 30 and Figure 31 on page 133
Host Memory
Frame
Buffer 1
Buffer 2
Buffer 3
4
Send Producer
Index
Broadcom
®
January 29, 2016 • 5718-PG108-R
show the basic driver flow to send a packet.

Figure 30: Transmit Data Flow

Host Memory
Send BD 1
Send BD 2
Send BD 3
1
Send BD 4
Send BD 5
Send BD 6
Send BD 7
Send BD 8
2
SendBD 512
3
NIC Memory
NIC Memory
Send BD 1
Send BD n
Send BD n+1
Send BD n+2
SendBD 128
Status
Block
7
6
Status
Block
5
Buffer 1
Tx
Buffer 2
Info
Buffer 3
TX Data Flow Diagram
Send Consumer
Index
Tx
MAC
Page 132