1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Chapter&#160;1.&#160;Introduction</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Writing s390 channel device drivers"><link rel="up" href="index.html" title="Writing s390 channel device drivers"><link rel="prev" href="index.html" title="Writing s390 channel device drivers"><link rel="next" href="ccw.html" title="Chapter&#160;2.&#160;The ccw bus"></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">Chapter&#160;1.&#160;Introduction</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="index.html">Prev</a>&#160;</td><th width="60%" align="center">&#160;</th><td width="20%" align="right">&#160;<a accesskey="n" href="ccw.html">Next</a></td></tr></table><hr></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a name="intro"></a>Chapter&#160;1.&#160;Introduction</h1></div></div></div><p>
2    This document describes the interfaces available for device drivers that
3    drive s390 based channel attached I/O devices. This includes interfaces for
4    interaction with the hardware and interfaces for interacting with the
5    common driver core. Those interfaces are provided by the s390 common I/O
6    layer.
7  </p><p>
8    The document assumes a familarity with the technical terms associated
9    with the s390 channel I/O architecture. For a description of this
10    architecture, please refer to the "z/Architecture: Principles of
11    Operation", IBM publication no. SA22-7832.
12  </p><p>
13    While most I/O devices on a s390 system are typically driven through the
14    channel I/O mechanism described here, there are various other methods
15    (like the diag interface). These are out of the scope of this document.
16  </p><p>
17    Some additional information can also be found in the kernel source
18    under Documentation/s390/driver-model.txt.
19  </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="index.html">Prev</a>&#160;</td><td width="20%" align="center">&#160;</td><td width="40%" align="right">&#160;<a accesskey="n" href="ccw.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing s390 channel device drivers&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;Chapter&#160;2.&#160;The ccw bus</td></tr></table></div></body></html>
20