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PCN(7D) PCN(7D)
NAME
pcn - PCnet Ethernet device driver
SYNOPSIS
/dev/pcn
DESCRIPTION
The pcn driver is a multi-threaded, loadable, clonable GLDv3-based
STREAMS driver supporting the Data Link Provider Interface dlpi(7P) for
the AMD PCnet family of Ethernet controllers.
APPLICATION PROGRAMMING INTERFACE
The pcn driver can be used as either a "style 1" or a "style 2" Data
Link Service Provider. Physical points of attachment (PPAs) are inter‐
preted as the instance number of the pcn controller as assigned by the
Illumos operating environment.
The values returned by the driver in the DL_INFO_ACK response are:
o Maximum SDU is 1500.
o Minimum SDU is 0.
o The dlsap address length is 8.
o MAC type is DL_ETHER.
o SAP length is -2. The 6-byte physical address is immediately
followed by a 2-byte SAP.
o Service mode is DL_CLDLS.
o The broadcast address is the 6-byte Ethernet broadcast
address (ff:ff:ff:ff:ff:ff).
CONFIGURATION
The pcn driver performs auto-negotiation to select the link speed and
mode. Link sped may be 100Mbps full-duplex, 100Mbps half-duplex,
10Mbps full-duplex, or 10Mbps half-duplex, depending on the hardware
adapter type. See the IEEE802.3 standard for more information.
The capabilities advertised by the pcn device can be set using
dladm(1m). The driver supports a number of parameters whose names
being with en_ (see below). Each of these parameters contains a bool‐
ean value that determines if the devices advertises that mode of opera‐
tions. The adv_autoneg_cap parameter controls whether auto-negotioat‐
ion is performed. If adv_autoneg_cap is set to 0, the driver forces
the mode of operation selected by the first non-zero parameter in pri‐
ority order as shown below:
(highest priority/greatest throughput)
en_100fdx_cap 100Mbps full duplex
en_10fdx_cap 10Mbps full duplex
(lowest priority/least throughput)
All capabilities default to enabled. Note that changing any capability
parameter causes te link to go down while the link partners renegotiate
the link speed/duplex using the newly changed capabilities.
ATTRIBUTES
See attributes(5) for a description of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Architecture │ x86 │
├────────────────────┼─────────────────┤
│Interface Stability │ Committed │
└────────────────────┴─────────────────┘
FILES
/dev/pcn
Special character device.
/kernel/drv/pcn
32-bit driver binary.
/kernel/drv/amd64/pcn
64-bit driver binary (x86).
SEE ALSO
dlpi(1m), attributes(5), streamio(7I), dlpi(7p)
IEEE 802.3 — Institute of Electrical and Electronics Engineers, 2002
Sep 16, 2011 PCN(7D)
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