Data Sheet

Ethernet Controller I210 — Programming Interface
504
8.18.72 Management Full Buffer Drop Packet Count - MNGFBDPC
(0x4154; RC/W)
8.19 Statistical Counters
The I210 supports nine statistical counters per queue.
8.19.1 Per Queue Good Packets Received Count - PQGPRC (0x10010 +
n*0x100 [n=0...3]; RW)
This register counts the number of legal length good packets received in queue[n]. The legal length for
the received packet is defined by the value of Long Packet Enable (RCTL.LPE) (refer to
Section 8.18.37). This register does not include received flow control packets and only counts packets
that pass filtering. This register only increments if receive is enabled.
Note: PQGPRC might count packets interrupted by a link disconnect although they have a CRC error.
Unlike some other statistics registers that are not allocated per VM, this register is not cleared
on read. Furthermore, the register wraps around back to 0x0000 on the next increment when
reaching a value of 0xFFFF and then continues normal count operation.
8.19.2 Per Queue Good Packets Transmitted Count - PQGPTC (0x10014
+ n*0x100 [n=0...3]; RW)
This register counts the number of good (no errors) packets transmitted on queue[n]. A good transmit
packet is considered one that is 64 or more bytes in length (from <Destination Address> through
<CRC>, inclusively) in length. This does not include transmitted flow control packets. This register only
increments if transmits are enabled (TCTL.EN is set). This counter includes loopback packets or packets
later dropped by the MAC.
A multicast packet dropped by some of the destinations, but sent to others is counted by this counter
Note: Unlike some other statistic registers that are not allocated per VM, this register is not cleared
on read. Furthermore, the register wraps around back to 0x0000 on the next increment when
reaching a value of 0xFFFFFFFF and then continues normal count operation.
Field Bit(s) Initial Value Description
MNGFDPC 31:0 0x0
Management Buffer Full Drop Packet Count.
Counts the number of packets destined to management that were dropped due to lack
of space in the management buffer.
Note: The counter does not wrap around when reaching a value of 0xFFFFFFFF.
Field Bit(s) Initial Value Description
GPRC 31:0 0x0 Number of good packets received (of any length).
Field Bit(s) Initial Value Description
GPTC 31:0 0x0 Number of good packets transmitted.