Broadcom BCM5722 - NIC Diagnostic Return Rings Producer Index Registers 1-4 (Offset 0 X3 C80-0 X3 C8 F)-BCM5722; NIC Receive BD Consumer Index Register (Offset 0 X3 C54-0 X3 C57); Table 287: NIC Return Ring Producer Index Registers (Offset 0 X3 C80, 0 X3 C84, 0 X3 C88, and 0 X3 C8 C)- BCM5722, BCM5755, BCM5755 M, BCM5756 M, BCM5757, BCM5754, BCM5787 Only

Programmer’s Guide BCM5722
10/15/07
Broadcom Corporation
Document 5722-PG101-R Host Coalescing Control Registers Page 298
NIC RECEIVE BD CONSUMER INDEX REGISTER (OFFSET 0X3C54–0X3C57)
This register is used to keep track of the receive BDs that have been DMAed to the NIC.
NIC DIAGNOSTIC RETURN RINGS PRODUCER INDEX REGISTERS 1–4 (OFFSET
0
X3C80–0X3C8F)—BCM5722, BCM5755, BCM5755M, BCM5756M, BCM5757,
BCM5754, BCM5787 O
NLY
These four registers keep track of the NIC local copy of the return ring producer index (not the host copy which is DMAed
by the Host Coalescing engine to the host).
20 Recv List Selector The Recv List Selector state machine has caused an attention. Fatal
19 Recv Data and Recv BD
Initiator
The Recv Data and Recv BD Initiator state machine has
caused an attention.
Fatal
18 Recv Data Completion The Recv Data Completion state machine has caused an
attention.
Fatal
17 RCB Incorrectly
Configured
Set if one of the RCBs is incorrectly configured based on the
whole configuration.
Fatal
16 DMA Completion
Discard
The DMA Completion Discard state machine has caused an
attention.
Fatal
15 Host Coalescing The Host Coalescing state machine has caused an attention. Fatal
14:8 Reserved – 0
7 Memory Arbiter The Memory Arbiter has caused an attention. Fatal
6 MBUF Low Water The MBUF allocation state machine has reached the mbuf low
water threshold.
Non-fatal
5;0 Reserved –
Note: The programmer should not write to these registers—they are for internal use to aid with debugging and
diagnostics only.
Table 287: NIC Return Ring Producer Index Registers (Offset 0x3C80, 0x3c84, 0x3c88, and 0x3c8c)—
BCM5722, BCM5755, BCM5755M, BCM5756M, BCM5757, BCM5754, BCM5787 Only
Bit Field Description Init Access
31:11 Reserved – 0 RO
10:0 NIC Return Ring’s
Producer Index
NIC Return Ring’s Producer Index R/W
Table 286: Flow Attention Register (Offset 0x3C48) (Cont.)
Bit Field Description Init Fatality