1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>skb_frag_dma_map</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs"><link rel="up" href="ch01s02.html" title="Socket Buffer Functions"><link rel="prev" href="API-skb-frag-set-page.html" title="skb_frag_set_page"><link rel="next" href="API-skb-clone-writable.html" title="skb_clone_writable"></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">skb_frag_dma_map</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-skb-frag-set-page.html">Prev</a>&#160;</td><th width="60%" align="center">Socket Buffer Functions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-skb-clone-writable.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-skb-frag-dma-map"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>skb_frag_dma_map &#8212; 
2     maps a paged fragment via the DMA API
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">dma_addr_t <b class="fsfunc">skb_frag_dma_map </b>(</code></td><td>struct device * <var class="pdparam">dev</var>, </td></tr><tr><td>&#160;</td><td>const skb_frag_t * <var class="pdparam">frag</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">offset</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">size</var>, </td></tr><tr><td>&#160;</td><td>enum dma_data_direction <var class="pdparam">dir</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1095655620"></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     the device to map the fragment to
5    </p></dd><dt><span class="term"><em class="parameter"><code>frag</code></em></span></dt><dd><p>
6     the paged fragment to map
7    </p></dd><dt><span class="term"><em class="parameter"><code>offset</code></em></span></dt><dd><p>
8     the offset within the fragment (starting at the
9     fragment's own offset)
10    </p></dd><dt><span class="term"><em class="parameter"><code>size</code></em></span></dt><dd><p>
11     the number of bytes to map
12    </p></dd><dt><span class="term"><em class="parameter"><code>dir</code></em></span></dt><dd><p>
13     the direction of the mapping (<code class="constant">PCI_DMA_</code>*)
14    </p></dd></dl></div></div><div class="refsect1"><a name="idp1095661444"></a><h2>Description</h2><p>
15   Maps the page associated with <em class="parameter"><code>frag</code></em> to <em class="parameter"><code>device</code></em>.
16</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-skb-frag-set-page.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch01s02.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-skb-clone-writable.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">skb_frag_set_page</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">skb_clone_writable</span></td></tr></table></div></body></html>
17