<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><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 V1.75.2" /><link rel="home" href="index.html" title="libATA Developer's Guide" /><link rel="up" href="ch05.html" title="Chapter 5. libata Core Internals" /><link rel="prev" href="re74.html" title="ata_port_flush_task" /><link rel="next" href="re76.html" title="ata_exec_internal" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>ata_exec_internal_sg</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re74.html">Prev</a> </td><th width="60%" align="center">Chapter 5. libata Core Internals</th><td width="20%" align="right"> <a accesskey="n" href="re76.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="ata_exec_internal_sg"><a id="API-ata-exec-internal-sg"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ata_exec_internal_sg — execute libata internal command </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">unsigned <b class="fsfunc">ata_exec_internal_sg </b>(</code></td><td>struct ata_device * <var class="pdparam">dev</var>, </td></tr><tr><td> </td><td>struct ata_taskfile * <var class="pdparam">tf</var>, </td></tr><tr><td> </td><td>const u8 * <var class="pdparam">cdb</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">dma_dir</var>, </td></tr><tr><td> </td><td>struct scatterlist * <var class="pdparam">sgl</var>, </td></tr><tr><td> </td><td>unsigned int <var class="pdparam">n_elem</var>, </td></tr><tr><td> </td><td>unsigned long <var class="pdparam">timeout</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2903618"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p> Device to which the command is sent </p></dd><dt><span class="term"><em class="parameter"><code>tf</code></em></span></dt><dd><p> Taskfile registers for the command and the result </p></dd><dt><span class="term"><em class="parameter"><code>cdb</code></em></span></dt><dd><p> CDB for packet command </p></dd><dt><span class="term"><em class="parameter"><code>dma_dir</code></em></span></dt><dd><p> Data tranfer direction of the command </p></dd><dt><span class="term"><em class="parameter"><code>sgl</code></em></span></dt><dd><p> sg list for the data buffer of the command </p></dd><dt><span class="term"><em class="parameter"><code>n_elem</code></em></span></dt><dd><p> Number of sg entries </p></dd><dt><span class="term"><em class="parameter"><code>timeout</code></em></span></dt><dd><p> Timeout in msecs (0 for default) </p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2903745"></a><h2>Description</h2><p> Executes libata internal command with timeout. <em class="parameter"><code>tf</code></em> contains command on entry and result on return. Timeout and error conditions are reported via return value. No recovery action is taken after a command times out. It's caller's duty to clean up after timeout. </p></div><div class="refsect1" title="LOCKING"><a id="id2903764"></a><h2>LOCKING</h2><p> None. Should be called with kernel context, might sleep. </p></div><div class="refsect1" title="RETURNS"><a id="id2903775"></a><h2>RETURNS</h2><p> Zero on success, AC_ERR_* mask on failure </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re74.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch05.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re76.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>ata_port_flush_task</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_exec_internal</span></td></tr></table></div></body></html>