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27 .Dd September 30, 2014
32 .Nd "Solarflare 10Gb Ethernet adapter driver"
34 To compile this driver into the kernel,
35 place the following lines in your
36 kernel configuration file:
37 .Bd -ragged -offset indent
41 To load the driver as a
42 module at boot time, place the following line in
44 .Bd -literal -offset indent
50 driver provides support for 10Gb Ethernet adapters based on
51 Solarflare SFC9000 family controllers.
52 The driver supports jumbo
53 frames, transmit/receive checksum offload, TCP Segmentation Offload
54 (TSO), Large Receive Offload (LRO), VLAN checksum offload, VLAN TSO,
55 and Receive Side Scaling (RSS) using MSI-X interrupts.
57 The driver allocates 1 receive queue, transmit queue, event queue and
58 IRQ per CPU up to a maximum of 64.
59 IRQ affinities should be spread out using
61 Interrupt moderation may be controlled through the sysctl
62 .Va dev.sfxge.%d.int_mod
63 (units are microseconds).
65 For more information on configuring this device, see
68 A large number of MAC, PHY and data path statistics are available
70 .Va dev.sfxge.%d.stats .
72 fields including its serial number are available under the sysctl
73 .Va dev.sfxge.%d.vpd .
77 driver supports all 10Gb Ethernet adapters based on Solarflare SFC9000
80 Tunables can be set at the
82 prompt before booting the kernel or stored in
84 Actual values can be obtained using
86 .Bl -tag -width indent
87 .It Va hw.sfxge.rx_ring
88 The maximum number of descriptors in a receive queue ring.
89 Supported values are: 512, 1024, 2048 and 4096.
90 .It Va hw.sfxge.tx_ring
91 The maximum number of descriptors in a transmit queue ring.
92 Supported values are: 512, 1024, 2048 and 4096.
93 .It Va hw.sfxge.tx_dpl_get_max
94 The maximum length of the deferred packet
97 packets, used only if the transmit queue lock can be acquired.
98 If a packet is dropped, the
100 counter is incremented and the local sender receives ENOBUFS.
101 The value must be greater than 0.
102 .It Va hw.sfxge.tx_dpl_put_max
103 The maximum length of the deferred packet
106 packets, used if the transmit queue lock cannot be acquired.
107 If a packet is dropped, the
109 counter is incremented and the local sender receives ENOBUFS.
110 The value must be greater than or equal to 0.
113 For general information and support,
114 go to the Solarflare support website at:
115 .Pa https://support.solarflare.com .
126 driver was written by
129 .An Solarflare Communications, Inc.