Broadcom BCM5722 - DMA Resources; MAC Resources; Table 24: Send Data Initiator DMA Resources Statistics; Table 25: Receive List Placement DMA Resources Statistics

BCM5722 Programmer’s Guide
10/15/07
Broadcom Corporation
Page 57 Device Statistics Document 5722-PG101-R
DMA Resources
These statistics are generated by FTQ for monitoring any state machine which adds DMA descriptors to the either DMA
engine. These state machines include the:
• Send BD initiator
• Receive BD initiator
• Send data initiator
• Receive data and receive BD initiator
• Host coalescing state machines
The nicDmaReadQueueFull statistics shown in Table 24 are updated by the Send Data Initiator state machine.
The nicDmaWriteQueueFull statistics shown in Table 25 are updated by the Receive List Placement state machine
periodically.
MAC Resources
The nicSendDataCompQueueFull statistics shown in Table 26 are updated by the Send Data Initiator state machine.
The nicNoMoreRXBDs statistics shown in Table 27 are updated by the Receive List Placement state machine periodically.
Table 24: Send Data Initiator DMA Resources Statistics
Register Offset Value Name Description
0xCC0–0xCC3 nicDmaReadQueueFull Number of times DMA read queue was full.
0xCC4–0xCC7 nicDmaReadHighPrioQueueFull Number of times DMA read high priority queue was full.
Table 25: Receive List Placement DMA Resources Statistics
Register Offset Value Name Description
0x2244–0x2247 nicDmaWriteQueueFull Number of times DMA write queue was full.
0x2248–0x2224B nicDmaWriteHighPrioQueueFull Number of times DMA write high priority queue was full.
Table 26: Send Data Initiator MAC Resources Statistics
Register Offset Value Name Description
0xCC8–0xCCB nicSendDataCompQueueFull Number of times send data completion FTQ was full.
Table 27: Receive List Placement MAC Resources Statistics
Register Offset Value Name Description
0x224C–0x224F nicNoMoreRXBDs Number of times NIC ran out of the Receive Buffer Descriptors.