1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>dmam_declare_coherent_memory</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="ch02s03.html" title="Device Drivers DMA Management"><link rel="prev" href="API-dmam-free-noncoherent.html" title="dmam_free_noncoherent"><link rel="next" href="API-dmam-release-declared-memory.html" title="dmam_release_declared_memory"></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">dmam_declare_coherent_memory</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-dmam-free-noncoherent.html">Prev</a>&#160;</td><th width="60%" align="center">Device Drivers DMA Management</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-dmam-release-declared-memory.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-dmam-declare-coherent-memory"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>dmam_declare_coherent_memory &#8212; 
2     Managed <code class="function">dma_declare_coherent_memory</code>
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">int <b class="fsfunc">dmam_declare_coherent_memory </b>(</code></td><td>struct device * <var class="pdparam">dev</var>, </td></tr><tr><td>&#160;</td><td>phys_addr_t <var class="pdparam">phys_addr</var>, </td></tr><tr><td>&#160;</td><td>dma_addr_t <var class="pdparam">device_addr</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">size</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">flags</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1110599300"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
4     Device to declare coherent memory for
5    </p></dd><dt><span class="term"><em class="parameter"><code>phys_addr</code></em></span></dt><dd><p>
6     Physical address of coherent memory to be declared
7    </p></dd><dt><span class="term"><em class="parameter"><code>device_addr</code></em></span></dt><dd><p>
8     Device address of coherent memory to be declared
9    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
10     Size of coherent memory to be declared
11    </p></dd><dt><span class="term"><em class="parameter"><code>flags</code></em></span></dt><dd><p>
12     Flags
13    </p></dd></dl></div></div><div class="refsect1"><a name="idp1110605068"></a><h2>Description</h2><p>
14   Managed <code class="function">dma_declare_coherent_memory</code>.
15</p></div><div class="refsect1"><a name="idp1110606044"></a><h2>RETURNS</h2><p>
16   0 on success, -errno on failure.
17</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-dmam-free-noncoherent.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch02s03.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-dmam-release-declared-memory.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">dmam_free_noncoherent</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">dmam_release_declared_memory</span></td></tr></table></div></body></html>
18