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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>pci_request_region</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><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="re351.html" title="pci_release_region" /><link rel="next" href="re353.html" title="pci_request_region_exclusive" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>pci_request_region</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re351.html">Prev</a> </td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right"> <a accesskey="n" href="re353.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="pci_request_region"><a id="API-pci-request-region"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pci_request_region —
Reserve PCI I/O and memory resource
</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">int <b class="fsfunc">pci_request_region </b>(</code></td><td>struct pci_dev * <var class="pdparam">pdev</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">bar</var>, </td></tr><tr><td> </td><td>const char * <var class="pdparam">res_name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3004485"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>pdev</code></em></span></dt><dd><p>
PCI device whose resources are to be reserved
</p></dd><dt><span class="term"><em class="parameter"><code>bar</code></em></span></dt><dd><p>
BAR to be reserved
</p></dd><dt><span class="term"><em class="parameter"><code>res_name</code></em></span></dt><dd><p>
Name to be associated with resource
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3004547"></a><h2>Description</h2><p>
Mark the PCI region associated with PCI device <em class="parameter"><code>pdev</code></em> BAR <em class="parameter"><code>bar</code></em> as
being reserved by owner <em class="parameter"><code>res_name</code></em>. Do not access any
address inside the PCI regions unless this call returns
successfully.
</p><p>
Returns 0 on success, or <code class="constant">EBUSY</code> on error. A warning
message is also printed on failure.
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