dge
—
Intel i82597EX Ten Gigabit Ethernet driver
dge* at pci? dev ? function ?
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
support 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 table:
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 dramatically but may have negative effect on other devices in the
system.
- 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.
The dge
driver first appeared in NetBSD
2.0.
There should be an XGMII framework for the driver to use.