Commit 394b701c authored by Matt Porter's avatar Matt Porter Committed by Linus Torvalds
Browse files

[PATCH] RapidIO support: core base 

Adds a RapidIO subsystem to the kernel.  RIO is a switched fabric interconnect
used in higher-end embedded applications.  The curious can look at the specs
over at http://www.rapidio.org



The core code implements enumeration/discovery, management of
devices/resources, and interfaces for RIO drivers.

There's a lot more to do to take advantages of all the hardware features.
However, this should provide a good base for folks with RIO hardware to start
contributing.

Signed-off-by: default avatarMatt Porter <mporter@kernel.crashing.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d217d545

Documentation/DocBook/Makefile

+1 −1
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@@ -10,7 +10,7 @@ DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml videobook.xml \ 
	    kernel-hacking.xml kernel-locking.xml deviceiobook.xml \

	    procfs-guide.xml writing_usb_driver.xml \

	    sis900.xml kernel-api.xml journal-api.xml lsm.xml usb.xml \

	    gadget.xml libata.xml mtdnand.xml librs.xml

	    gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml



###

# The build process is as follows (targets):

Documentation/DocBook/rapidio.tmpl

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<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"

        "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [

	<!ENTITY rapidio SYSTEM "rapidio.xml">

	]>



<book id="RapidIO-Guide">

 <bookinfo>

  <title>RapidIO Subsystem Guide</title>



  <authorgroup>

   <author>

    <firstname>Matt</firstname>

    <surname>Porter</surname>

    <affiliation>

     <address>

      <email>mporter@kernel.crashing.org</email>

      <email>mporter@mvista.com</email>

     </address>

    </affiliation>

   </author>

  </authorgroup>



  <copyright>

   <year>2005</year>

   <holder>MontaVista Software, Inc.</holder>

  </copyright>



  <legalnotice>

   <para>

     This documentation is free software; you can redistribute

     it and/or modify it under the terms of the GNU General Public

     License version 2 as published by the Free Software Foundation.

   </para>



   <para>

     This program is distributed in the hope that it will be

     useful, but WITHOUT ANY WARRANTY; without even the implied

     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

     See the GNU General Public License for more details.

   </para>



   <para>

     You should have received a copy of the GNU General Public

     License along with this program; if not, write to the Free

     Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,

     MA 02111-1307 USA

   </para>



   <para>

     For more details see the file COPYING in the source

     distribution of Linux.

   </para>

  </legalnotice>

 </bookinfo>



<toc></toc>



  <chapter id="intro">

      <title>Introduction</title>

  <para>

	RapidIO is a high speed switched fabric interconnect with

	features aimed at the embedded market.  RapidIO provides

	support for memory-mapped I/O as well as message-based

	transactions over the switched fabric network. RapidIO has

	a standardized discovery mechanism not unlike the PCI bus

	standard that allows simple detection of devices in a

	network.

  </para>

  <para>

  	This documentation is provided for developers intending

	to support RapidIO on new architectures, write new drivers,

	or to understand the subsystem internals.

  </para>

  </chapter>



  <chapter id="bugs">

     <title>Known Bugs and Limitations</title>



     <sect1>

     	<title>Bugs</title>

	  <para>None. ;)</para>

     </sect1>

     <sect1>

     	<title>Limitations</title>

	  <para>

	    <orderedlist>

	      <listitem><para>Access/management of RapidIO memory regions is not supported</para></listitem>

	      <listitem><para>Multiple host enumeration is not supported</para></listitem>

	    </orderedlist>

	 </para>

     </sect1>

  </chapter>



  <chapter id="drivers">

     	<title>RapidIO driver interface</title>

	<para>

		Drivers are provided a set of calls in order

		to interface with the subsystem to gather info

		on devices, request/map memory region resources,

		and manage mailboxes/doorbells.

	</para>

	<sect1>

		<title>Functions</title>

!Iinclude/linux/rio_drv.h

!Edrivers/rapidio/rio-driver.c

!Edrivers/rapidio/rio.c

	</sect1>

  </chapter>



  <chapter id="internals">

     <title>Internals</title>



     <para>

     This chapter contains the autogenerated documentation of the RapidIO

     subsystem.

     </para>



     <sect1><title>Structures</title>

!Iinclude/linux/rio.h

     </sect1>

     <sect1><title>Enumeration and Discovery</title>

!Idrivers/rapidio/rio-scan.c

     </sect1>

     <sect1><title>Driver functionality</title>

!Idrivers/rapidio/rio.c

!Idrivers/rapidio/rio-access.c

     </sect1>

     <sect1><title>Device model support</title>

!Idrivers/rapidio/rio-driver.c

     </sect1>

     <sect1><title>Sysfs support</title>

!Idrivers/rapidio/rio-sysfs.c

     </sect1>

     <sect1><title>PPC32 support</title>

!Iarch/ppc/kernel/rio.c

!Earch/ppc/syslib/ppc85xx_rio.c

!Iarch/ppc/syslib/ppc85xx_rio.c

     </sect1>

  </chapter>



  <chapter id="credits">

     <title>Credits</title>

	<para>

		The following people have contributed to the RapidIO

		subsystem directly or indirectly:

		<orderedlist>

			<listitem><para>Matt Porter<email>mporter@kernel.crashing.org</email></para></listitem>

			<listitem><para>Randy Vinson<email>rvinson@mvista.com</email></para></listitem>

			<listitem><para>Dan Malek<email>dan@embeddedalley.com</email></para></listitem>

		</orderedlist>

	</para>

	<para>

		The following people have contributed to this document:

		<orderedlist>

			<listitem><para>Matt Porter<email>mporter@kernel.crashing.org</email></para></listitem>

		</orderedlist>

	</para>

  </chapter>

</book>

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -2071,6 +2071,12 @@ P: Matt Mackall 
M:	mpm@selenic.com

S:	Maintained



RAPIDIO SUBSYSTEM

P:	Matt Porter

M:	mporter@kernel.crashing.org

L:	linux-kernel@vger.kernel.org

S:	Maintained



REAL TIME CLOCK DRIVER

P:	Paul Gortmaker

M:	p_gortmaker@yahoo.com

drivers/Makefile

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@@ -7,6 +7,7 @@ 


obj-$(CONFIG_PCI)		+= pci/ usb/

obj-$(CONFIG_PARISC)		+= parisc/

obj-$(CONFIG_RAPIDIO)		+= rapidio/

obj-y				+= video/

obj-$(CONFIG_ACPI)		+= acpi/

# PnP must come after ACPI since it will eventually need to check if acpi

drivers/rapidio/Kconfig

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#

# RapidIO configuration

#

config RAPIDIO_8_BIT_TRANSPORT

	bool "8-bit transport addressing"

	depends on RAPIDIO

	---help---

	  By default, the kernel assumes a 16-bit addressed RapidIO

	  network. By selecting this option, the kernel will support

	  an 8-bit addressed network.



config RAPIDIO_DISC_TIMEOUT

	int "Discovery timeout duration (seconds)"

	depends on RAPIDIO

	default "30"

	---help---

	  Amount of time a discovery node waits for a host to complete

	  enumeration beforing giving up.

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