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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>Memory Management Helpers</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="The ALSA Driver API" /><link rel="up" href="ch01.html" title="Chapter 1. Management of Cards and Devices" /><link rel="prev" href="re15.html" title="snd_unregister_device" /><link rel="next" href="re16.html" title="copy_to_user_fromio" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Memory Management Helpers</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re15.html">Prev</a> </td><th width="60%" align="center">Chapter 1. Management of Cards and Devices</th><td width="20%" align="right"> <a accesskey="n" href="re16.html">Next</a></td></tr></table><hr /></div><div class="sect1" title="Memory Management Helpers"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id2946167"></a>Memory Management Helpers</h2></div></div></div><div class="toc"><dl><dt><span class="refentrytitle"><a href="re16.html"><span>copy_to_user_fromio</span></a></span><span class="refpurpose"> —
copy data from mmio-space to user-space
</span></dt><dt><span class="refentrytitle"><a href="re17.html"><span>copy_from_user_toio</span></a></span><span class="refpurpose"> —
copy data from user-space to mmio-space
</span></dt><dt><span class="refentrytitle"><a href="re18.html"><span>snd_malloc_pages</span></a></span><span class="refpurpose"> —
allocate pages with the given size
</span></dt><dt><span class="refentrytitle"><a href="re19.html"><span>snd_free_pages</span></a></span><span class="refpurpose"> —
release the pages
</span></dt><dt><span class="refentrytitle"><a href="re20.html"><span>snd_dma_alloc_pages</span></a></span><span class="refpurpose"> —
allocate the buffer area according to the given type
</span></dt><dt><span class="refentrytitle"><a href="re21.html"><span>snd_dma_alloc_pages_fallback</span></a></span><span class="refpurpose"> —
allocate the buffer area according to the given type with fallback
</span></dt><dt><span class="refentrytitle"><a href="re22.html"><span>snd_dma_free_pages</span></a></span><span class="refpurpose"> —
release the allocated buffer
</span></dt><dt><span class="refentrytitle"><a href="re23.html"><span>snd_dma_get_reserved_buf</span></a></span><span class="refpurpose"> —
get the reserved buffer for the given device
</span></dt><dt><span class="refentrytitle"><a href="re24.html"><span>snd_dma_reserve_buf</span></a></span><span class="refpurpose"> —
reserve the buffer
</span></dt></dl></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re15.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch01.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re16.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>snd_unregister_device</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>copy_to_user_fromio</span></td></tr></table></div></body></html>
