======================= 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