DGE(4) BSD Kernel Interfaces Manual DGE(4)NAMEdge — Intel i82597EX Ten Gigabit Ethernet driver
SYNOPSIS
dge* at pci? dev ? function ?
DESCRIPTION
The dge device driver supports the Intel i82597EX PRO/10GbE LR Ethernet
adapter, which uses a single mode fiber (1310nm) interface.
The i82597EX supports IPv4/TCP/UDP checksumming in hardware, as well as
TCP Segmentation Offloading (TSO). The driver does currently only sup‐
port the hardware checksumming features. See ifconfig(8) for information
on how to enable the hardware checksum calculations.
The driver also makes use of the ifconfig(8) link flags link0 and link1
to set the PCIX burst size. The burst size is set according to this ta‐
ble:
link0 link1 burst size
off off 512
on off 1024
off on 2048
on on 4096
A larger burst size will increase the transmit capacity of the card dra‐
matically but may have negative effect on other devices in the system.
DIAGNOSTICS
dge%d: Tx packet consumes too many DMA segments, dropping... The packet
consisted of too many small mbufs and could therefore not be loaded into
a DMA map. This is most unlikely, the driver can currently handle up to
100 segments, but over 80 segments has been seen using large (16k) jumbo
frames.
dge%s: device timeout (txfree %d txsfree %d txnext %d) The i82597EX had
been given packets to send, but didn't interrupt within 5 seconds. This
diagnostic is most likely the result of a hardware failure, and the chip
will be reset to resume normal operation.
dge%d: Receive overrun If the computer is under heavy load, the software
may not be able to keep up removing received datagrams from the receive
queue, and will therefore loose datagrams. To avoid this, check that the
other end is using the XON/XOFF protocol, if possible, or increase the
receive descriptor ring size in the driver.
dge%d: symbol error
dge%d: parity error An error in the XGMII communication was detected.
This is a hardware error in the MAC<->PHY communication bus.
dge%d: CRC error A CRC error in the received datagram was detected. The
error is probably caused in the fiber communication.
dge%d: WARNING: reset failed to complete This is a fatal error and means
that the hardware is broken and will most likely not function correctly.
dge%d: unable to allocate or map rx buffer %d error = %d The driver was
not able to map a mbuf cluster page to a receive descriptor entry in the
receive ring. Most likely the system has run out of mbuf clusters or
have a too small cluster map. See the errno for more information.
SEE ALSOarp(4), ifmedia(4), netintro(4), pci(4), ifconfig(8)HISTORY
The dge driver first appeared in NetBSD 2.0.
AUTHORS
The dge driver was written by Anders Magnusson ⟨ragge@ludd.luth.se⟩.
BUGS
There should be an XGMII framework for the driver to use.
BSD March 18, 2004 BSD
