1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>pci_get_domain_bus_and_slot</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ch09s05.html" title="PCI Support Library"><link rel="prev" href="API-pci-get-slot.html" title="pci_get_slot"><link rel="next" href="API-pci-get-subsys.html" title="pci_get_subsys"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">pci_get_domain_bus_and_slot</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-pci-get-slot.html">Prev</a>&#160;</td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-pci-get-subsys.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-pci-get-domain-bus-and-slot"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pci_get_domain_bus_and_slot &#8212; 
2     locate PCI device for a given PCI domain (segment), bus, and slot
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct pci_dev * <b class="fsfunc">pci_get_domain_bus_and_slot </b>(</code></td><td>int <var class="pdparam">domain</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">bus</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">devfn</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1126758684"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>domain</code></em></span></dt><dd><p>
4     PCI domain/segment on which the PCI device resides.
5    </p></dd><dt><span class="term"><em class="parameter"><code>bus</code></em></span></dt><dd><p>
6     PCI bus on which desired PCI device resides
7    </p></dd><dt><span class="term"><em class="parameter"><code>devfn</code></em></span></dt><dd><p>
8     encodes number of PCI slot in which the desired PCI device
9     resides and the logical device number within that slot in case of
10     multi-function devices.
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1126762524"></a><h2>Description</h2><p>
12   Given a PCI domain, bus, and slot/function number, the desired PCI
13   device is located in the list of PCI devices. If the device is
14   found, its reference count is increased and this function returns a
15   pointer to its data structure.  The caller must decrement the
16   reference count by calling <code class="function">pci_dev_put</code>.  If no device is found,
17   <code class="constant">NULL</code> is returned.
18</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-pci-get-slot.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch09s05.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-pci-get-subsys.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">pci_get_slot</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">pci_get_subsys</span></td></tr></table></div></body></html>
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