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All Rights Reserved. 26 27 .TH "PCN" "7D" "Jan 10, 2020" 28 . 29 .SH "NAME" 30 \fBpcn\fR \- PCnet Ethernet device driver 31 .SH "SYNOPSIS" 32 .nf 33 \fB/dev/pcn\fR 34 .fi 35 36 .SH "DESCRIPTION" 37 The \fBpcn\fR driver is a multi\-threaded, loadable, clonable GLDv3\-based 38 STREAMS driver supporting the Data Link Provider Interface \fBdlpi\fR(7P) for 39 the AMD PCnet family of Ethernet controllers. 40 .SH "APPLICATION PROGRAMMING INTERFACE" 41 The \fBpcn\fR driver can be used as either a "style 1" or a "style 2" Data Link 42 Service Provider. Physical points of attachment (PPAs) are interpreted as the 43 instance number of the \fBpcn\fR controller as assigned by the 44 operating environment. 45 .sp 46 .LP 47 The values returned by the driver in the \fBDL_INFO_ACK\fR response are: 48 .RS +4 49 .TP 50 .ie t \(bu 51 .el o 52 Maximum SDU is 1500. 53 .RE 54 .RS +4 55 .TP 56 .ie t \(bu 57 .el o 58 Minimum SDU is 0. 59 .RE 60 .RS +4 61 .TP 62 .ie t \(bu 63 .el o 64 The dlsap address length is 8. 65 .RE 66 .RS +4 67 .TP 68 .ie t \(bu 69 .el o 70 MAC type is \fBDL_ETHER\fR. 71 .RE 72 .RS +4 73 .TP 74 .ie t \(bu 75 .el o 76 SAP length is \-2. The 6\-byte physical address is immediately followed by a 77 2\-byte SAP. 78 .RE 79 .RS +4 80 .TP 81 .ie t \(bu 82 .el o 83 Service mode is \fBDL_CLDLS\fR. 84 .RE 85 .RS +4 86 .TP 87 .ie t \(bu 88 .el o 89 The broadcast address is the 6\-byte Ethernet broadcast address 90 (\fBff:ff:ff:ff:ff:ff\fR). 91 .SH "CONFIGURATION" 92 The \fBpcn\fR driver performs auto-negotiation to select the link speed and 93 mode. Link speed may be 100Mbps full\-duplex, 100Mbps half\-duplex, 94 10Mbps full\-duplex, or 10Mbps half\-duplex, depending on the hardware 95 adapter type. See the \fIIEEE802.3\fR standard for more information. 96 .sp 97 .LP 98 The capabilities advertised by the \fBpcn\fR device can be set using 99 \fBdladm\fR(1m). The driver supports a number of parameters whose names 100 begin with \fBen_\fR (see below). Each of these parameters contains a 101 boolean value that determines if the device advertises that mode of 102 operations. The \fBadv_autoneg_cap\fR parameter controls whether 103 auto-negotiation is performed. If \fBadv_autoneg_cap\fR is set to 0, the 104 driver forces the mode of operation selected by the first non-zero 105 parameter in priority order as shown below: 106 .sp 107 .in +2 108 .nf 109 (highest priority/greatest throughput) 110 en_100fdx_cap 100Mbps full duplex 111 en_10fdx_cap 10Mbps full duplex 112 (lowest priority/least throughput) 113 .fi 114 .in -2 115 116 .sp 117 .LP 118 All capabilities default to enabled. Note that changing any capability 119 parameter causes the link to go down while the link partners renegotiate 120 the link speed/duplex using the newly changed capabilities. 121 .SH "ATTRIBUTES" 122 See \fBattributes\fR(5) for a description of the following attributes: 123 .sp 124 125 .sp 126 .TS 127 box; 128 c | c 129 l | l . 130 ATTRIBUTE TYPE ATTRIBUTE VALUE 131 _ 132 Architecture x86 133 _ 134 Interface Stability Committed 135 .TE 136 137 .SH "FILES" 138 .ne 2 139 .na 140 \fB/dev/pcn\fR 141 .ad 142 .sp .6 143 .RS 4n 144 Special character device. 145 .RE 146 147 .sp 148 .ne 2 149 .na 150 \fB/kernel/drv/amd64/pcn\fR 151 .ad 152 .sp .6 153 .RS 4n 154 Device driver (x86) 155 .RE 156 157 .SH "SEE ALSO" 158 \fBattributes\fR(5), \fBstreamio\fR(7I), \fBdlpi\fR(7p) 159 .sp 160 .LP 161 \fIIEEE 802.3\fR \(em Institute of Electrical and Electronics Engineers, 2002