Descriptor RingsBCM5718 Programmer’s Guide
Broadcom®
January 29, 2016 • 5718-PG108-R Page 72
Receive Ring Control Blocks
Ta b le 7 lists all of the receive RCB Register Addresses.
Table 6: Send RCBs for Multiple Rings
Send Ring# Register Name
Send Ring RCB
Register Address (**)
Usable in
Legacy /
1
Host Address High 0x100 Legacy Mode,
RSS Mode &
IOV Mode
Host Address Low 0x104
Max Length/Flag 0x108
NIC Address 0x10C
2
Host Address High 0x110
RSS Mode &
IOV Mode
Host Address Low 0x114
Max Length/Flag 0x118
NIC Address 0x11C
3
4
5
IOV Mode Only
…. ……… ……
16 Host Address High 0x1F0
Host Address Low 0x1F4
Max Length/Flag 0x1F8
NIC Address 0x1FC
** These are Memory Mapped registers
Note: Address range [0x100–0x10F] is the legacy single RCB address and is also used by RCB1.
Table 7: High Priority Mail Box Registers for VRQ Rings
VRQ # Register Name
Standard Ring RCB
Register Address
Jumbo Ring RCB
Register Address
Return Ring RCB Register
Address (**)
0 (Default)
Host Address High 0x2450 0x2440 0x200
Host Address Low 0x2454 0x2444 0x204
Max Length/Flag 0x2458 0x2448 0x208
NIC Address 0x245C 0x244C 0x20C
1
Host Address High 0x2510 0x2500 0x210
Host Address Low 0x2514 0x2504 0x214
Max Length/Flag 0x2518 0x2508 0x218
NIC Address 0x251C 0x250C 0x21C
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