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-<table class="head">
- <tr>
- <td class="head-ltitle">AXP(4)</td>
- <td class="head-vol">Device Drivers Manual</td>
- <td class="head-rtitle">AXP(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">axp</code> &#x2014; <span class="Nd">Advanced
- Micro Devices 10G Ethernet driver</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp">To compile this driver into the kernel, place the following lines
- in your kernel configuration file:</p>
-<div class="Bd Pp Bd-indent"><code class="Cd">device iflib</code>
-<br/>
-<code class="Cd">device axp</code></div>
-<p class="Pp">Alternatively, to load the driver as a module at boot time, place
- the following line in <a class="Xr">loader.conf(5)</a>:</p>
-<div class="Bd Pp Bd-indent Li">
-<pre>if_axp_load=&quot;YES&quot;</pre>
-</div>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">The <code class="Nm">axp</code> driver enables PCI-E based 10G
- Ethernet controller inbuilt in the AMD EPYC processors.</p>
-<p class="Pp">The following features are supported.</p>
-<p class="Pp"></p>
-<ul class="Bl-bullet Bl-compact">
- <li>1G/10G SFP+ Link</li>
- <li>Jumbo frames (9000 Bytes)</li>
- <li>Transmit and Receive checksum offload</li>
- <li>TCP segmentation offload (TSO)</li>
- <li>VLAN tag insertion/extraction</li>
- <li>VLAN checksum offload</li>
- <li>VLAN TSO</li>
- <li>Receive side steering (RSS)</li>
- <li>IPV4 and IPV6 capable</li>
- <li>MSI-X interrupts</li>
- <li>Split header</li>
-</ul>
-<p class="Pp">All the above mentioned features are enabled by default.</p>
-<p class="Pp">For hardware related questions, please refer the documentation
- supplied along with AMD EPYC processors.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYSCTL_VARIABLES"><a class="permalink" href="#SYSCTL_VARIABLES">SYSCTL
- VARIABLES</a></h1>
-<p class="Pp">The following variables are available as
- <a class="Xr">sysctl(8)</a> variables:</p>
-<dl class="Bl-tag">
- <dt id="dev.ax.X.mac_stats"><var class="Va">dev.ax.X.mac_stats</var></dt>
- <dd>Dumps the transmit and receive statistics counter values for the
- controller. This includes statistics specific to each transmit and receive
- queue.</dd>
- <dt id="dev.ax.X.channels_info"><var class="Va">dev.ax.X.channels_info</var></dt>
- <dd>Dumps the permissible and default configured transmit and receive channel
- information.</dd>
- <dt id="dev.ax.X.ringparam_info"><var class="Va">dev.ax.X.ringparam_info</var></dt>
- <dd>Dumps the permissible and default configured descriptor information for
- the transmit and receive queue.</dd>
- <dt id="dev.ax.X.link_ksettings_info"><var class="Va">dev.ax.X.link_ksettings_info</var></dt>
- <dd>Dumps the current link setting like link mode, speed, duplex
- settings.</dd>
- <dt id="dev.ax.X.pauseparam_info"><var class="Va">dev.ax.X.pauseparam_info</var></dt>
- <dd>Dumps the current flow-control settings.</dd>
- <dt id="dev.ax.X.coalesce_info"><var class="Va">dev.ax.X.coalesce_info</var></dt>
- <dd>Dumps the current interrupt coalescing settings.</dd>
- <dt id="dev.ax.X.link_info"><var class="Va">dev.ax.X.link_info</var></dt>
- <dd>Dumps the current state of the Link.</dd>
- <dt id="dev.ax.X.drv_info"><var class="Va">dev.ax.X.drv_info</var></dt>
- <dd>Dumps the driver and controller firmware version information.</dd>
- <dt id="dev.ax.X.YYYY_register"><var class="Va">dev.ax.X.YYYY_register</var></dt>
- <dd style="width: auto;">&#x00A0;</dd>
- <dt id="dev.ax.X.YYYY_register_values"><var class="Va">dev.ax.X.YYYY_register_values</var></dt>
- <dd>Sysctl to dump a specific register from a specific block of the
- controller. YYYY specifies the block. The following blocks are supported.
- <ul class="Bl-bullet Bl-compact">
- <li>xpcs</li>
- <li>xgmac</li>
- <li>xprop</li>
- <li>xi2c</li>
- </ul>
- <p class="Pp">Set the offset of the register to the first variable, and then
- read the value of the register by reading the second variable.</p>
- </dd>
- <dt id="dev.ax.X.axgbe_debug_level"><var class="Va">dev.ax.X.axgbe_debug_level</var></dt>
- <dd>Configure the log-level for the driver. Default is 0. Supports 0-3.</dd>
- <dt id="dev.ax.X.link_workaround"><var class="Va">dev.ax.X.link_workaround</var></dt>
- <dd>This variable enables the workaround for an intermittent link issue. When
- link does not come up for long time, this variable can be set to 1 to
- reset the phy and bring up the link.</dd>
-</dl>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="LOADER_TUNABLES"><a class="permalink" href="#LOADER_TUNABLES">LOADER
- TUNABLES</a></h1>
-<p class="Pp">The following variable is available as
- <a class="Xr">loader.conf(5)</a> tunable.</p>
-<dl class="Bl-tag">
- <dt id="dev.ax.X.sph_enable"><var class="Va">dev.ax.X.sph_enable</var></dt>
- <dd>This variable controls split header feature for the interface. Default is
- 1, meaning the split header support is enabled.
- <p class="Pp">This variable must be set before loading the driver, either
- via <a class="Xr">loader.conf(5)</a> or through
- <a class="Xr">kenv(1)</a>. This cannot be modified when driver is
- loaded.</p>
- <p class="Pp">Setting this variable in <a class="Xr">loader.conf(5)</a>
- needs the system to be restarted to take effect. When using
- <a class="Xr">kenv(1)</a>, use the wrapper variable
- <var class="Va">dev.ax.sph_enable</var>, which will
- configure(enable/disable) split header support for all
- <code class="Nm">axp</code> interfaces.</p>
- <p class="Pp">To use netmap with this device, split header support must be
- disabled (set this variable to 0).</p>
- </dd>
-</dl>
-</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">iflib(4)</a>,
- <a class="Xr">netmap(4)</a>, <a class="Xr">vlan(4)</a>,
- <a class="Xr">ifconfig(8)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
-<p class="Pp">The <code class="Nm">axp</code> device driver first appeared in
- <span class="Ux">FreeBSD 13.0</span>.</p>
-<p class="Pp">Another version of the driver is already present in
- <span class="Ux">FreeBSD</span>. This driver was named as &quot;axgbe&quot;
- earlier, which is renamed as &quot;axa&quot; now. This driver is for the
- ACPI based Ethernet controllers in the previous/older version of the
- hardware. This driver is authored by
- &lt;<a class="Mt" href="mailto:andrew@FreeBSD.org">andrew@FreeBSD.org</a>&gt;.</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">axp</code> device driver was written by
- <span class="An">Advanced Micro Devices Inc</span>.</p>
-<p class="Pp">For any issues and support requirements, email the details to
- &lt;<a class="Mt" href="mailto:rajesh1.kumar@amd.com">rajesh1.kumar@amd.com</a>&gt;.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">February 19, 2021</td>
- <td class="foot-os">FreeBSD 15.0</td>
- </tr>
-</table>