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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_translate</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="re139.html" title="ata_scsi_rw_xlat" /><link rel="next" href="re141.html" title="ata_scsi_rbuf_get" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>ata_scsi_translate</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re139.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="re141.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="ata_scsi_translate"><a id="API-ata-scsi-translate"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ata_scsi_translate —
Translate then issue SCSI command to ATA 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_translate </b>(</code></td><td>struct ata_device * <var class="pdparam">dev</var>, </td></tr><tr><td> </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>, </td></tr><tr><td> </td><td>ata_xlat_func_t <var class="pdparam">xlat_func</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2881133"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
ATA device to which the command is addressed
</p></dd><dt><span class="term"><em class="parameter"><code>cmd</code></em></span></dt><dd><p>
SCSI command to execute
</p></dd><dt><span class="term"><em class="parameter"><code>done</code></em></span></dt><dd><p>
SCSI command completion function
</p></dd><dt><span class="term"><em class="parameter"><code>xlat_func</code></em></span></dt><dd><p>
Actor which translates <em class="parameter"><code>cmd</code></em> to an ATA taskfile
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2881217"></a><h2>Description</h2><p>
Our -><code class="function">queuecommand</code> function has decided that the SCSI
command issued can be directly translated into an ATA
command, rather than handled internally.
</p><p>
This function sets up an ata_queued_cmd structure for the
SCSI command, and sends that ata_queued_cmd to the hardware.
</p><p>
The xlat_func argument (actor) returns 0 if ready to execute
ATA command, else 1 to finish translation. If 1 is returned
then cmd->result (and possibly cmd->sense_buffer) are assumed
to be set reflecting an error condition or clean (early)
termination.
</p></div><div class="refsect1" title="LOCKING"><a id="id2881248"></a><h2>LOCKING</h2><p>
spin_lock_irqsave(host lock)
</p></div><div class="refsect1" title="RETURNS"><a id="id2881258"></a><h2>RETURNS</h2><p>
0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
needs to be deferred.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re139.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="re141.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>ata_scsi_rw_xlat</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_rbuf_get</span></td></tr></table></div></body></html>
