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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>rio_get_device</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="RapidIO Subsystem Guide" /><link rel="up" href="ch03.html#Functions" title="Functions" /><link rel="prev" href="re36.html" title="rio_get_asm" /><link rel="next" href="ch04.html" title="Chapter 4. Internals" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>rio_get_device</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re36.html">Prev</a> </td><th width="60%" align="center">Functions</th><td width="20%" align="right"> <a accesskey="n" href="ch04.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="rio_get_device"><a id="API-rio-get-device"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>rio_get_device —
Begin or continue searching for a RIO device by vid/did
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">struct rio_dev * <b class="fsfunc">rio_get_device </b>(</code></td><td>u16 <var class="pdparam">vid</var>, </td></tr><tr><td> </td><td>u16 <var class="pdparam">did</var>, </td></tr><tr><td> </td><td>struct rio_dev * <var class="pdparam">from</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2851313"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>vid</code></em></span></dt><dd><p>
RIO vid to match or <code class="constant">RIO_ANY_ID</code> to match all vids
</p></dd><dt><span class="term"><em class="parameter"><code>did</code></em></span></dt><dd><p>
RIO did to match or <code class="constant">RIO_ANY_ID</code> to match all dids
</p></dd><dt><span class="term"><em class="parameter"><code>from</code></em></span></dt><dd><p>
Previous RIO device found in search, or <code class="constant">NULL</code> for new search
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2851381"></a><h2>Description</h2><p>
Iterates through the list of known RIO devices. If a RIO device is
found with a matching <em class="parameter"><code>vid</code></em> and <em class="parameter"><code>did</code></em>, the reference count to the
device is incrememted and a pointer to its device structure is returned.
Otherwise, <code class="constant">NULL</code> is returned. A new search is initiated by passing <code class="constant">NULL</code>
to the <em class="parameter"><code>from</code></em> argument. Otherwise, if <em class="parameter"><code>from</code></em> is not <code class="constant">NULL</code>, searches
continue from next device on the global list. The reference count for
<em class="parameter"><code>from</code></em> is always decremented if it is not <code class="constant">NULL</code>.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re36.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03.html#Functions">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch04.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>rio_get_asm</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 4. Internals</td></tr></table></div></body></html>
