Copyright 2011 Jason King. All rights reserved.
Copyright (c) 2001-2007 by Garrett D'Amore.
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Portions Copyright (c) 2007 by Sun Microsystems, Inc. All Rights Reserved.
/dev/pcn
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\.
The values returned by the driver in the DL_INFO_ACK response are:
Maximum SDU is 1500\.
Minimum SDU is 0\.
The dlsap address length is 8\.
MAC type is DL_ETHER\.
SAP length is -2\. The 6-byte physical address is immediately followed by a 2-byte SAP\.
Service mode is DL_CLDLS\.
The broadcast address is the 6-byte Ethernet broadcast address (ff:ff:ff:ff:ff:ff)\.
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 boolean value that determines if the devices advertises that mode of operations\. The adv_autoneg_cap parameter controls whether auto-negotioation 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 priority 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\.
See attributes(5) for a description of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Architecture x86 |
| Interface Stability Committed |
Special character device\.
32-bit driver binary\.
64-bit driver binary (x86)\.
dlpi(1m), attributes(5), streamio(7I), dlpi(7p)
IEEE 802.3 \(em Institute of Electrical and Electronics Engineers, 2002