1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
<table class="head">
<tr>
<td class="head-ltitle">ENA(4)</td>
<td class="head-vol">Device Drivers Manual</td>
<td class="head-rtitle">ENA(4)</td>
</tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">ena</code> — <span class="Nd">NetBSD
kernel driver for Elastic Network Adapter (ENA) family</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">ena* at pci? dev ? function ?</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The ENA is a networking interface designed to make good use of
modern CPU features and system architectures.</p>
<p class="Pp">The ENA device exposes a lightweight management interface with a
minimal set of memory mapped registers and extendable command set through an
Admin Queue.</p>
<p class="Pp">The driver supports a range of ENA devices, is link-speed
independent (i.e., the same driver is used for 10GbE, 25GbE, 40GbE, etc.),
and has a negotiated and extendable feature set.</p>
<p class="Pp">Some ENA devices support SR-IOV. This driver is used for both the
SR-IOV Physical Function (PF) and Virtual Function (VF) devices.</p>
<p class="Pp">The ENA devices enable high speed and low overhead network traffic
processing by providing multiple Tx/Rx queue pairs (the maximum number is
advertised by the device via the Admin Queue), a dedicated MSI-X interrupt
vector per Tx/Rx queue pair, and CPU cacheline optimized data placement.</p>
<p class="Pp">The <code class="Nm">ena</code> driver supports industry standard
TCP/IP offload features such as checksum offload and TCP transmit
segmentation offload (TSO). Receive-side scaling (RSS) is supported for
multi-core scaling.</p>
<p class="Pp">The <code class="Nm">ena</code> driver and its corresponding
devices implement health monitoring mechanisms such as watchdog, enabling
the device and driver to recover in a manner transparent to the application,
as well as debug logs.</p>
<p class="Pp">Some of the ENA devices support a working mode called Low-latency
Queue (LLQ), which saves several more microseconds. This feature might be
implemented for the driver in future releases.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="HARDWARE"><a class="permalink" href="#HARDWARE">HARDWARE</a></h1>
<p class="Pp">Supported PCI vendor ID/device IDs:</p>
<p class="Pp"></p>
<ul class="Bl-bullet Bl-compact">
<li>1d0f:0ec2 - ENA PF</li>
<li>1d0f:1ec2 - ENA PF with LLQ support</li>
<li>1d0f:ec20 - ENA VF</li>
<li>1d0f:ec21 - ENA VF with LLQ support</li>
</ul>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h1>
<p class="Pp"><a class="Xr">arp(4)</a>, <a class="Xr">ifmedia(4)</a>,
<a class="Xr">netintro(4)</a>, <a class="Xr">pci(4)</a>,
<a class="Xr">ifconfig(8)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp">The <code class="Nm">ena</code> driver was originally written by
<span class="An">Semihalf</span> for <span class="Ux">FreeBSD</span>. The
driver was ported to <span class="Ux">NetBSD</span> by
<span class="An">Jared D. McNeill</span>
<<a class="Mt" href="mailto:jmcneill@NetBSD.org">jmcneill@NetBSD.org</a>>.</p>
</section>
</div>
<table class="foot">
<tr>
<td class="foot-date">December 1, 2018</td>
<td class="foot-os">NetBSD 10.1</td>
</tr>
</table>
|
