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36 .Nd "Agere ET1310 10/100/Gigabit Ethernet device"
41 Alternatively, to load the driver as a module at boot time, place the
43 .Pa /boot/loader.conf :
44 .Bd -literal -offset indent
50 driver supports the PCIe Ethernet adapters based on Agere ET1310.
52 Support for Jumbo Frames is provided via the interface MTU setting.
53 Selecting an MTU larger than 1500 bytes with the
55 utility configures the adapter to receive and transmit Jumbo Frames.
56 The maximum MTU setting for Jumbo Frames is 15572.
57 This value coincides with the maximum Jumbo Frames size of 15594.
61 driver supports the following
65 .Bl -tag -width 10baseT/UTP -compact
67 Enable autoselection of the media types and options
73 option can also be used to select either
80 Set 100Mbps (Fast Ethernet) operation.
83 option can also be used to select either
90 Set 1000Mbps (Gigabit Ethernet) operation.
93 option can only be set
100 driver supports the following
104 .Bl -tag -width full-duplex -compact
106 Force full duplex operation.
109 Force half duplex operation.
112 Note that the 1000baseT media type is only available
113 if it is supported by the adapter.
114 For more information on configuring this device,
118 .Bl -tag -width ".Va hw.et.rx_intr_npkts"
119 .It Va hw.et.rx_intr_npkts
120 This value controls how many packets should be received
121 before a receive interrupt is generated.
122 The default value is 129.
123 It is recommended to set this value above 38 to prevent host from being
124 livelocked under a high degree of stress.
125 .It Va hw.et.rx_intr_delay
126 This value delays the generation of receive interrupts
127 in units of ~4 microseconds.
128 It is used together with
129 .Va hw.et.rx_intr_npkts
130 to achieve RX interrupt moderation.
131 The default value is 25.
132 .It Va hw.et.tx_intr_nsegs
133 This value controls how many segments (not packets) should be transmitted
134 before a transmit interrupt is generated.
135 The default value is 256.
136 It is recommended to set this value below 280 to prevent TX ring from underflow.
138 This value controls how often the a timer interrupt should be generated.
139 It is used together with
140 .Va hw.et.tx_intr_nsegs
141 to achieve TX interrupt moderation.
142 The default value is 1000000000 (nanoseconds).
155 device driver first appeared in
161 driver was written by
162 .An Sepherosa Ziehau Aq Mt sepherosa@gmail.com .