doc/opal-api/opal-pci-set-p2p-157.html


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  <section id="opal-pci-set-p2p">
<span id="id1"></span><h1>OPAL_PCI_SET_P2P<a class="headerlink" href="#opal-pci-set-p2p" title="Permalink to this headline">¶</a></h1>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define OPAL_PCI_SET_P2P                     157</span>

<span class="kt">int64_t</span><span class="w"> </span><span class="nf">opal_pci_set_p2p</span><span class="p">(</span><span class="kt">uint64_t</span><span class="w"> </span><span class="n">phbid_init</span><span class="p">,</span><span class="w"> </span><span class="kt">uint64_t</span><span class="w"> </span><span class="n">phbid_target</span><span class="p">,</span><span class="w"></span>
<span class="w">                             </span><span class="kt">uint64_t</span><span class="w"> </span><span class="n">desc</span><span class="p">,</span><span class="w"> </span><span class="kt">uint16_t</span><span class="w"> </span><span class="n">pe_number</span><span class="p">);</span><span class="w"></span>

<span class="cm">/* PCI p2p descriptor */</span><span class="w"></span>
<span class="cp">#define OPAL_PCI_P2P_ENABLE          0x1</span>
<span class="cp">#define OPAL_PCI_P2P_LOAD            0x2</span>
<span class="cp">#define OPAL_PCI_P2P_STORE           0x4</span>
</pre></div>
</div>
<p>The host calls this function to enable PCI peer-to-peer on the PHBs.</p>
<section id="parameters">
<h2>Parameters<a class="headerlink" href="#parameters" title="Permalink to this headline">¶</a></h2>
<dl class="simple">
<dt><code class="docutils literal notranslate"><span class="pre">phbid_init</span></code></dt><dd><p>is the value from the PHB node ibm,opal-phbid property for the device initiating the p2p operation</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">phbid_target</span></code></dt><dd><p>is the value from the PHB node ibm,opal-phbid property for the device targeted by the p2p operation</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">desc</span></code></dt><dd><p>tells whether the p2p operation is a store (OPAL_PCI_P2P_STORE) or load (OPAL_PCI_P2P_LOAD). Can be both.
OPAL_PCI_P2P_ENABLE enables/disables the setting</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">pe_number</span></code></dt><dd><p>PE number for the initiating device</p>
</dd>
</dl>
</section>
<section id="return-values">
<h2>Return Values<a class="headerlink" href="#return-values" title="Permalink to this headline">¶</a></h2>
<dl class="simple">
<dt><a class="reference internal" href="return-codes.html#opal-success"><span class="std std-ref">OPAL_SUCCESS</span></a></dt><dd><p>Configuration was successful</p>
</dd>
<dt><a class="reference internal" href="return-codes.html#opal-parameter"><span class="std std-ref">OPAL_PARAMETER</span></a></dt><dd><p>Invalid PHB or mode parameter</p>
</dd>
<dt><a class="reference internal" href="return-codes.html#opal-unsupported"><span class="std std-ref">OPAL_UNSUPPORTED</span></a></dt><dd><p>Not supported by hardware</p>
</dd>
</dl>
</section>
</section>


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<li><a class="reference internal" href="#">OPAL_PCI_SET_P2P</a><ul>
<li><a class="reference internal" href="#parameters">Parameters</a></li>
<li><a class="reference internal" href="#return-values">Return Values</a></li>
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