1<html><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 V1.78.1"><link rel="home" href="index.html" title="libATA Developer's Guide"><link rel="up" href="libataScsiInt.html" title="Chapter&#160;6.&#160;libata SCSI translation/emulation"><link rel="prev" href="API-ata-scsi-change-queue-depth.html" title="ata_scsi_change_queue_depth"><link rel="next" href="API-ata-scsi-simulate.html" title="ata_scsi_simulate"></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">ata_scsi_queuecmd</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-ata-scsi-change-queue-depth.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;6.&#160;libata SCSI translation/emulation</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-ata-scsi-simulate.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-ata-scsi-queuecmd"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ata_scsi_queuecmd &#8212; 
2     Issue SCSI cdb to libata-managed device
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">ata_scsi_queuecmd </b>(</code></td><td>struct Scsi_Host * <var class="pdparam">shost</var>, </td></tr><tr><td>&#160;</td><td>struct scsi_cmnd * <var class="pdparam">cmd</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124448452"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>shost</code></em></span></dt><dd><p>
4     SCSI host of command to be sent
5    </p></dd><dt><span class="term"><em class="parameter"><code>cmd</code></em></span></dt><dd><p>
6     SCSI command to be sent
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124451084"></a><h2>Description</h2><p>
8   In some cases, this function translates SCSI commands into
9   ATA taskfiles, and queues the taskfiles to be sent to
10   hardware.  In other cases, this function simulates a
11   SCSI device by evaluating and responding to certain
12   SCSI commands.  This creates the overall effect of
13   ATA and ATAPI devices appearing as SCSI devices.
14</p></div><div class="refsect1"><a name="idp1124452020"></a><h2>LOCKING</h2><p>
15   ATA host lock
16</p></div><div class="refsect1"><a name="idp1124452636"></a><h2>RETURNS</h2><p>
17   Return value from <code class="function">__ata_scsi_queuecmd</code> if <em class="parameter"><code>cmd</code></em> can be queued,
18   0 otherwise.
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