======================= RapidIO Subsystem Guide

:Author: Matt Porter

Introduction

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.

This documentation is provided for developers intending to support RapidIO on new architectures, write new drivers, or to understand the subsystem internals.

Known Bugs and Limitations

Bugs

None. 😉

Limitations

1. Access/management of RapidIO memory regions is not supported

2. Multiple host enumeration is not supported

RapidIO driver interface

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.

Functions

.. kernel-doc:: include/linux/rio_drv.h :internal:

.. kernel-doc:: drivers/rapidio/rio-driver.c :export:

.. kernel-doc:: drivers/rapidio/rio.c :export:

Internals

This chapter contains the autogenerated documentation of the RapidIO subsystem.

Structures

.. kernel-doc:: include/linux/rio.h :internal:

Enumeration and Discovery

.. kernel-doc:: drivers/rapidio/rio-scan.c :internal:

Driver functionality

.. kernel-doc:: drivers/rapidio/rio.c :internal:

.. kernel-doc:: drivers/rapidio/rio-access.c :internal:

Device model support

.. kernel-doc:: drivers/rapidio/rio-driver.c :internal:

PPC32 support

.. kernel-doc:: arch/powerpc/sysdev/fsl_rio.c :internal:

Credits

The following people have contributed to the RapidIO subsystem directly or indirectly:

1. Matt Porter\ mporter@kernel.crashing.org

2. Randy Vinson\ rvinson@mvista.com

3. Dan Malek\ dan@embeddedalley.com

The following people have contributed to this document:

1. Matt Porter\ mporter@kernel.crashing.org