1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>ata_exec_internal_sg</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="libataInt.html" title="Chapter&#160;5.&#160;libata Core Internals"><link rel="prev" href="API-ata-dump-id.html" title="ata_dump_id"><link rel="next" href="API-ata-exec-internal.html" title="ata_exec_internal"></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_exec_internal_sg</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-ata-dump-id.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;5.&#160;libata Core Internals</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-ata-exec-internal.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-ata-exec-internal-sg"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ata_exec_internal_sg &#8212; 
2     execute libata internal command
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">unsigned <b class="fsfunc">ata_exec_internal_sg </b>(</code></td><td>struct ata_device * <var class="pdparam">dev</var>, </td></tr><tr><td>&#160;</td><td>struct ata_taskfile * <var class="pdparam">tf</var>, </td></tr><tr><td>&#160;</td><td>const u8 * <var class="pdparam">cdb</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">dma_dir</var>, </td></tr><tr><td>&#160;</td><td>struct scatterlist * <var class="pdparam">sgl</var>, </td></tr><tr><td>&#160;</td><td>unsigned int <var class="pdparam">n_elem</var>, </td></tr><tr><td>&#160;</td><td>unsigned long <var class="pdparam">timeout</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124067276"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
4     Device to which the command is sent
5    </p></dd><dt><span class="term"><em class="parameter"><code>tf</code></em></span></dt><dd><p>
6     Taskfile registers for the command and the result
7    </p></dd><dt><span class="term"><em class="parameter"><code>cdb</code></em></span></dt><dd><p>
8     CDB for packet command
9    </p></dd><dt><span class="term"><em class="parameter"><code>dma_dir</code></em></span></dt><dd><p>
10     Data transfer direction of the command
11    </p></dd><dt><span class="term"><em class="parameter"><code>sgl</code></em></span></dt><dd><p>
12     sg list for the data buffer of the command
13    </p></dd><dt><span class="term"><em class="parameter"><code>n_elem</code></em></span></dt><dd><p>
14     Number of sg entries
15    </p></dd><dt><span class="term"><em class="parameter"><code>timeout</code></em></span></dt><dd><p>
16     Timeout in msecs (0 for default)
17    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124074892"></a><h2>Description</h2><p>
18   Executes libata internal command with timeout.  <em class="parameter"><code>tf</code></em> contains
19   command on entry and result on return.  Timeout and error
20   conditions are reported via return value.  No recovery action
21   is taken after a command times out.  It's caller's duty to
22   clean up after timeout.
23</p></div><div class="refsect1"><a name="idp1124076076"></a><h2>LOCKING</h2><p>
24   None.  Should be called with kernel context, might sleep.
25</p></div><div class="refsect1"><a name="idp1124076724"></a><h2>RETURNS</h2><p>
26   Zero on success, AC_ERR_* mask on failure
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