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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:59:05 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:59:05 -0400
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-<table class="head">
- <tr>
- <td class="head-ltitle">PCI_IOV_INIT(9)</td>
- <td class="head-vol">Kernel Developer's Manual</td>
- <td class="head-rtitle">PCI_IOV_INIT(9)</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">PCI_IOV_INIT</code> &#x2014;
- <span class="Nd">enable SR-IOV on a PF device</span></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
-<p class="Pp"><code class="In">#include
- &lt;<a class="In">sys/bus.h</a>&gt;</code>
- <br/>
- <code class="In">#include &lt;<a class="In">sys/stdarg.h</a>&gt;</code>
- <br/>
- <code class="In">#include &lt;<a class="In">sys/nv.h</a>&gt;</code>
- <br/>
- <code class="In">#include
- &lt;<a class="In">dev/pci/pci_iov.h</a>&gt;</code></p>
-<p class="Pp"><var class="Ft">int</var>
- <br/>
- <code class="Fn">PCI_IOV_INIT</code>(<var class="Fa" style="white-space: nowrap;">device_t
- dev</var>, <var class="Fa" style="white-space: nowrap;">uint16_t
- num_vfs</var>, <var class="Fa" style="white-space: nowrap;">const nvlist_t
- *pf_config</var>);</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
-<p class="Pp">The
- <a class="permalink" href="#PCI_IOV_INIT"><code class="Fn" id="PCI_IOV_INIT">PCI_IOV_INIT</code></a>()
- method is called by the PCI Single-Root I/O Virtualization (SR-IOV)
- infrastructure when the user requests that SR-IOV be enabled on a Physical
- Function (PF). The number of Virtual Functions (VFs) that will be created is
- passed to this method in the <var class="Fa">num_vfs</var> argument.</p>
-<p class="Pp">If the driver requested device-specific PF configuration
- parameters via a PF schema in its call to
- <a class="Xr">pci_iov_attach(9)</a>, those parameters will be available in
- the <var class="Fa">pf_config</var> argument. All configuration parameters
- that were either set as required parameters or that had a default value set
- in the PF schema are guaranteed to be present in
- <var class="Fa">pf_config</var>. Configuration parameters that were neither
- set as required nor were given a default value are optional and may or may
- not be present in <var class="Fa">pf_config</var>.
- <var class="Fa">pf_config</var> will not contain any configuration
- parameters that were not specified in the PF schema. All configuration
- parameters will have the correct type and are in the range of valid values
- specified in the schema.</p>
-<p class="Pp">If this method returns successfully, then this method will not be
- called again on the same device until after a call to
- <a class="Xr">PCI_IOV_UNINIT(9)</a>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
- VALUES</a></h1>
-<p class="Pp">Returns 0 on success, otherwise an appropriate error is returned.
- If this method returns an error then the SR-IOV configuration will be
- aborted and no VFs will be created.</p>
-</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">nv(9)</a>, <a class="Xr">pci(9)</a>,
- <a class="Xr">PCI_IOV_ADD_VF(9)</a>, <a class="Xr">pci_iov_schema(9)</a>,
- <a class="Xr">PCI_IOV_UNINIT(9)</a></p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
-<p class="Pp">This manual page was written by <span class="An">Ryan Stone</span>
- &lt;<a class="Mt" href="mailto:rstone@FreeBSD.org">rstone@FreeBSD.org</a>&gt;.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">May 28, 2015</td>
- <td class="foot-os">FreeBSD 15.0</td>
- </tr>
-</table>