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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>ata_scsi_queuecmd</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="libATA Developer's Guide" /><link rel="up" href="ch06.html" title="Chapter 6. libata SCSI translation/emulation" /><link rel="prev" href="re115.html" title="ata_scsi_change_queue_depth" /><link rel="next" href="re117.html" title="ata_scsi_simulate" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>ata_scsi_queuecmd</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re115.html">Prev</a> </td><th width="60%" align="center">Chapter 6. libata SCSI translation/emulation</th><td width="20%" align="right"> <a accesskey="n" href="re117.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="ata_scsi_queuecmd"><a id="API-ata-scsi-queuecmd"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ata_scsi_queuecmd —
Issue SCSI cdb to libata-managed device
</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">int <b class="fsfunc">ata_scsi_queuecmd </b>(</code></td><td>struct scsi_cmnd * <var class="pdparam">cmd</var>, </td></tr><tr><td> </td><td>void (*<var class="pdparam">done</var>)
<code>(</code>struct scsi_cmnd *<code>)</code><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2877264"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>cmd</code></em></span></dt><dd><p>
SCSI command to be sent
</p></dd><dt><span class="term"><em class="parameter"><code>done</code></em></span></dt><dd><p>
Completion function, called when command is complete
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2877308"></a><h2>Description</h2><p>
In some cases, this function translates SCSI commands into
ATA taskfiles, and queues the taskfiles to be sent to
hardware. In other cases, this function simulates a
SCSI device by evaluating and responding to certain
SCSI commands. This creates the overall effect of
ATA and ATAPI devices appearing as SCSI devices.
</p></div><div class="refsect1" title="LOCKING"><a id="id2877323"></a><h2>LOCKING</h2><p>
Releases scsi-layer-held lock, and obtains host lock.
</p></div><div class="refsect1" title="RETURNS"><a id="id2877334"></a><h2>RETURNS</h2><p>
Return value from <code class="function">__ata_scsi_queuecmd</code> if <em class="parameter"><code>cmd</code></em> can be queued,
0 otherwise.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re115.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch06.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re117.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>ata_scsi_change_queue_depth</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>ata_scsi_simulate</span></td></tr></table></div></body></html>
