1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_vma_node_start</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="drm-memory-management.html#idp1122718668" title="VMA Offset Manager"><link rel="prev" href="API-drm-vma-node-reset.html" title="drm_vma_node_reset"><link rel="next" href="API-drm-vma-node-size.html" title="drm_vma_node_size"></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">drm_vma_node_start</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-vma-node-reset.html">Prev</a>&#160;</td><th width="60%" align="center">VMA Offset Manager</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-vma-node-size.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-vma-node-start"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_vma_node_start &#8212; 
2     Return start address for page-based addressing
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">unsigned long <b class="fsfunc">drm_vma_node_start </b>(</code></td><td>struct drm_vma_offset_node * <var class="pdparam">node</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1122854204"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>node</code></em></span></dt><dd><p>
4     Node to inspect
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1122855732"></a><h2>Description</h2><p>
6   Return the start address of the given node. This can be used as offset into
7   the linear VM space that is provided by the VMA offset manager. Note that
8   this can only be used for page-based addressing. If you need a proper offset
9   for user-space mappings, you must apply <span class="quote">&#8220;<span class="quote">&lt;&lt; PAGE_SHIFT</span>&#8221;</span> or use the
10   <code class="function">drm_vma_node_offset_addr</code> helper instead.
11</p></div><div class="refsect1"><a name="idp1122857140"></a><h2>RETURNS</h2><p>
12   Start address of <em class="parameter"><code>node</code></em> for page-based addressing. 0 if the node does not
13   have an offset allocated.
14</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-drm-vma-node-reset.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="drm-memory-management.html#idp1122718668">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-drm-vma-node-size.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">drm_vma_node_reset</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">drm_vma_node_size</span></td></tr></table></div></body></html>
15