MOS(4) - Device Drivers Manual #

MOS(4) - Device Drivers Manual

NAME #

mos - MosChip MCS7730/7830/7832 10/100 USB Ethernet device

SYNOPSIS #

mos* at uhub?

DESCRIPTION #

The mos driver provides support for USB Ethernet adapters based on the MosChip MCS7730, MCS7830 and MCS7832 USB 2.0 chipsets, including the following:

Delock 61147

Sitecom LN-030

Syba SY-U2LAN

All adapters operate with either USB 1.x or USB 2.0 controllers, though performance with 1.x controllers is limited since the USB 1.x standard specifies a maximum transfer speed of 12Mbps. Users with USB 1.x controllers should therefore not expect to actually achieve 100Mbps speeds with these devices.

A 64-bit multicast hash table is supported, single perfect filter entry for the station address, all-multicast mode, and promiscuous mode. Packets are received and transmitted over separate USB bulk transfer endpoints.

The mos driver supports the following media types:

autoselect

Enable autoselection of the media type and options (this is the default). The user can manually override the autoselected mode by adding media options to the appropriate hostname.if(5) file.

10baseT

Set 10Mbps operation.

100baseTX

Set 100Mbps (Fast Ethernet) operation.

The mos driver supports the following media options:

full-duplex

Force full-duplex operation.

half-duplex

Force half-duplex operation.

For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS #

mos0: watchdog timeout A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the transmission before a timeout expired.

mos0: no memory for rx list The driver failed to allocate an mbuf for the receiver ring.

HISTORY #

The mos device driver first appeared in OpenBSD 4.5.

AUTHORS #

The mos driver was written by Johann Christian Rode <jcrode@gmx.net>.

OpenBSD 7.5 - February 18, 2022