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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>i2o_msg_in_to_virt</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch04s02.html" title="I2O message devices" /><link rel="prev" href="re428.html" title="i2o_msg_out_to_virt" /><link rel="next" href="re430.html" title="i2o_msg_get" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>i2o_msg_in_to_virt</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re428.html">Prev</a> </td><th width="60%" align="center">I2O message devices</th><td width="20%" align="right"> <a accesskey="n" href="re430.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="i2o_msg_in_to_virt"><a id="API-i2o-msg-in-to-virt"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>i2o_msg_in_to_virt —
Turn an I2O message to a virtual address
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">struct i2o_message __iomem * <b class="fsfunc">i2o_msg_in_to_virt </b>(</code></td><td>struct i2o_controller * <var class="pdparam">c</var>, </td></tr><tr><td> </td><td>u32 <var class="pdparam">m</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3088298"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>c</code></em></span></dt><dd><p>
controller
</p></dd><dt><span class="term"><em class="parameter"><code>m</code></em></span></dt><dd><p>
message engine value
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3088341"></a><h2>Description</h2><p>
Turn a send message from an I2O controller bus address into
a Linux virtual address. The shared page frame is a linear block
so we simply have to shift the offset. This function does not
work for receive side messages as they are kmalloc objects
in a different pool.
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