1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>snd_dma_alloc_pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The ALSA Driver API"><link rel="up" href="ch01s04.html" title="Memory Management Helpers"><link rel="prev" href="API-snd-free-pages.html" title="snd_free_pages"><link rel="next" href="API-snd-dma-alloc-pages-fallback.html" title="snd_dma_alloc_pages_fallback"></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">snd_dma_alloc_pages</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-snd-free-pages.html">Prev</a>&#160;</td><th width="60%" align="center">Memory Management Helpers</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-snd-dma-alloc-pages-fallback.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-snd-dma-alloc-pages"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_dma_alloc_pages &#8212; 
2     allocate the buffer area according to the given type
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">snd_dma_alloc_pages </b>(</code></td><td>int <var class="pdparam">type</var>, </td></tr><tr><td>&#160;</td><td>struct device * <var class="pdparam">device</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">size</var>, </td></tr><tr><td>&#160;</td><td>struct snd_dma_buffer * <var class="pdparam">dmab</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1093460172"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>type</code></em></span></dt><dd><p>
4     the DMA buffer type
5    </p></dd><dt><span class="term"><em class="parameter"><code>device</code></em></span></dt><dd><p>
6     the device pointer
7    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
8     the buffer size to allocate
9    </p></dd><dt><span class="term"><em class="parameter"><code>dmab</code></em></span></dt><dd><p>
10     buffer allocation record to store the allocated data
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1093464756"></a><h2>Description</h2><p>
12   Calls the memory-allocator function for the corresponding
13   buffer type.
14</p></div><div class="refsect1"><a name="idp1093465420"></a><h2>Return</h2><p>
15   Zero if the buffer with the given size is allocated successfully,
16   otherwise a negative value on error.
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-snd-free-pages.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s04.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-snd-dma-alloc-pages-fallback.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">snd_free_pages</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">snd_dma_alloc_pages_fallback</span></td></tr></table></div></body></html>
18