docs: rapidio: convert to ReST
Rename the rapidio documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab
parent
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15
Documentation/rapidio/index.rst
Normal file
15
Documentation/rapidio/index.rst
Normal file
@ -0,0 +1,15 @@
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:orphan:
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===========================
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The Linux RapidIO Subsystem
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===========================
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.. toctree::
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:maxdepth: 1
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rapidio
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sysfs
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tsi721
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mport_cdev
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rio_cm
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@ -1,13 +1,9 @@
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==================================================================
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RapidIO subsystem mport character device driver (rio_mport_cdev.c)
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==================================================================
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Version History:
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----------------
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1.0.0 - Initial driver release.
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==================================================================
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I. Overview
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1. Overview
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===========
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This device driver is the result of collaboration within the RapidIO.org
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Software Task Group (STG) between Texas Instruments, Freescale,
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@ -29,40 +25,41 @@ Using available set of ioctl commands user-space applications can perform
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following RapidIO bus and subsystem operations:
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- Reads and writes from/to configuration registers of mport devices
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(RIO_MPORT_MAINT_READ_LOCAL/RIO_MPORT_MAINT_WRITE_LOCAL)
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(RIO_MPORT_MAINT_READ_LOCAL/RIO_MPORT_MAINT_WRITE_LOCAL)
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- Reads and writes from/to configuration registers of remote RapidIO devices.
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This operations are defined as RapidIO Maintenance reads/writes in RIO spec.
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(RIO_MPORT_MAINT_READ_REMOTE/RIO_MPORT_MAINT_WRITE_REMOTE)
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(RIO_MPORT_MAINT_READ_REMOTE/RIO_MPORT_MAINT_WRITE_REMOTE)
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- Set RapidIO Destination ID for mport devices (RIO_MPORT_MAINT_HDID_SET)
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- Set RapidIO Component Tag for mport devices (RIO_MPORT_MAINT_COMPTAG_SET)
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- Query logical index of mport devices (RIO_MPORT_MAINT_PORT_IDX_GET)
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- Query capabilities and RapidIO link configuration of mport devices
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(RIO_MPORT_GET_PROPERTIES)
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(RIO_MPORT_GET_PROPERTIES)
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- Enable/Disable reporting of RapidIO doorbell events to user-space applications
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(RIO_ENABLE_DOORBELL_RANGE/RIO_DISABLE_DOORBELL_RANGE)
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(RIO_ENABLE_DOORBELL_RANGE/RIO_DISABLE_DOORBELL_RANGE)
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- Enable/Disable reporting of RIO port-write events to user-space applications
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(RIO_ENABLE_PORTWRITE_RANGE/RIO_DISABLE_PORTWRITE_RANGE)
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(RIO_ENABLE_PORTWRITE_RANGE/RIO_DISABLE_PORTWRITE_RANGE)
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- Query/Control type of events reported through this driver: doorbells,
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port-writes or both (RIO_SET_EVENT_MASK/RIO_GET_EVENT_MASK)
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- Configure/Map mport's outbound requests window(s) for specific size,
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RapidIO destination ID, hopcount and request type
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(RIO_MAP_OUTBOUND/RIO_UNMAP_OUTBOUND)
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(RIO_MAP_OUTBOUND/RIO_UNMAP_OUTBOUND)
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- Configure/Map mport's inbound requests window(s) for specific size,
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RapidIO base address and local memory base address
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(RIO_MAP_INBOUND/RIO_UNMAP_INBOUND)
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(RIO_MAP_INBOUND/RIO_UNMAP_INBOUND)
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- Allocate/Free contiguous DMA coherent memory buffer for DMA data transfers
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to/from remote RapidIO devices (RIO_ALLOC_DMA/RIO_FREE_DMA)
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- Initiate DMA data transfers to/from remote RapidIO devices (RIO_TRANSFER).
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Supports blocking, asynchronous and posted (a.k.a 'fire-and-forget') data
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transfer modes.
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- Check/Wait for completion of asynchronous DMA data transfer
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(RIO_WAIT_FOR_ASYNC)
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(RIO_WAIT_FOR_ASYNC)
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- Manage device objects supported by RapidIO subsystem (RIO_DEV_ADD/RIO_DEV_DEL).
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This allows implementation of various RapidIO fabric enumeration algorithms
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as user-space applications while using remaining functionality provided by
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kernel RapidIO subsystem.
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II. Hardware Compatibility
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2. Hardware Compatibility
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=========================
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This device driver uses standard interfaces defined by kernel RapidIO subsystem
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and therefore it can be used with any mport device driver registered by RapidIO
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@ -78,29 +75,35 @@ functionality of their platform when planning to use this driver:
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specific DMA engine support and therefore DMA data transfers mport_cdev driver
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are not available.
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III. Module parameters
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3. Module parameters
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====================
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- 'dma_timeout' - DMA transfer completion timeout (in msec, default value 3000).
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- 'dma_timeout'
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- DMA transfer completion timeout (in msec, default value 3000).
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This parameter set a maximum completion wait time for SYNC mode DMA
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transfer requests and for RIO_WAIT_FOR_ASYNC ioctl requests.
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- 'dbg_level' - This parameter allows to control amount of debug information
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- 'dbg_level'
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- This parameter allows to control amount of debug information
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generated by this device driver. This parameter is formed by set of
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bit masks that correspond to the specific functional blocks.
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For mask definitions see 'drivers/rapidio/devices/rio_mport_cdev.c'
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This parameter can be changed dynamically.
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Use CONFIG_RAPIDIO_DEBUG=y to enable debug output at the top level.
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IV. Known problems
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4. Known problems
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=================
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None.
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V. User-space Applications and API
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5. User-space Applications and API
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==================================
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API library and applications that use this device driver are available from
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RapidIO.org.
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VI. TODO List
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6. TODO List
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============
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- Add support for sending/receiving "raw" RapidIO messaging packets.
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- Add memory mapped DMA data transfers as an option when RapidIO-specific DMA
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@ -1,6 +1,6 @@
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The Linux RapidIO Subsystem
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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============
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Introduction
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============
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The RapidIO standard is a packet-based fabric interconnect standard designed for
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use in embedded systems. Development of the RapidIO standard is directed by the
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@ -11,7 +11,7 @@ This document describes the basics of the Linux RapidIO subsystem and provides
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information on its major components.
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1 Overview
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----------
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==========
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Because the RapidIO subsystem follows the Linux device model it is integrated
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into the kernel similarly to other buses by defining RapidIO-specific device and
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@ -22,7 +22,7 @@ architecture-specific interfaces that provide support for common RapidIO
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subsystem operations.
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2. Core Components
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------------------
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==================
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A typical RapidIO network is a combination of endpoints and switches.
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Each of these components is represented in the subsystem by an associated data
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@ -30,6 +30,7 @@ structure. The core logical components of the RapidIO subsystem are defined
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in include/linux/rio.h file.
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2.1 Master Port
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---------------
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A master port (or mport) is a RapidIO interface controller that is local to the
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processor executing the Linux code. A master port generates and receives RapidIO
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@ -46,6 +47,7 @@ includes rio_ops data structure which contains pointers to hardware specific
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implementations of RapidIO functions.
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2.2 Device
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----------
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A RapidIO device is any endpoint (other than mport) or switch in the network.
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All devices are presented in the RapidIO subsystem by corresponding rio_dev data
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@ -53,6 +55,7 @@ structure. Devices form one global device list and per-network device lists
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(depending on number of available mports and networks).
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2.3 Switch
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----------
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A RapidIO switch is a special class of device that routes packets between its
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ports towards their final destination. The packet destination port within a
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@ -66,6 +69,7 @@ specific switch drivers that are designed to provide hardware-specific
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implementation of common switch management routines.
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2.4 Network
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-----------
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A RapidIO network is a combination of interconnected endpoint and switch devices.
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Each RapidIO network known to the system is represented by corresponding rio_net
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@ -74,11 +78,13 @@ ports that form the same network. It also contains a pointer to the default
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master port that is used to communicate with devices within the network.
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2.5 Device Drivers
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------------------
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RapidIO device-specific drivers follow Linux Kernel Driver Model and are
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intended to support specific RapidIO devices attached to the RapidIO network.
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2.6 Subsystem Interfaces
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------------------------
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RapidIO interconnect specification defines features that may be used to provide
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one or more common service layers for all participating RapidIO devices. These
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@ -90,7 +96,7 @@ subsystem interfaces. This allows to have multiple common services attached to
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the same device without blocking attachment of a device-specific driver.
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3. Subsystem Initialization
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---------------------------
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===========================
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In order to initialize the RapidIO subsystem, a platform must initialize and
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register at least one master port within the RapidIO network. To register mport
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@ -105,7 +111,7 @@ RapidIO subsystem can be configured to be built as a statically linked or
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modular component of the kernel (see details below).
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4. Enumeration and Discovery
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----------------------------
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============================
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4.1 Overview
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------------
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@ -168,14 +174,16 @@ on RapidIO subsystem build configuration:
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(b) If the RapidIO subsystem core is built as a loadable module, in addition
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to the method shown above, the host destination ID(s) can be specified using
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traditional methods of passing module parameter "hdid=" during its loading:
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- from command line: "modprobe rapidio hdid=-1,7", or
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- from modprobe configuration file using configuration command "options",
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like in this example: "options rapidio hdid=-1,7". An example of modprobe
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configuration file is provided in the section below.
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NOTES:
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NOTES:
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(i) if "hdid=" parameter is omitted all available mport will be assigned
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destination ID = -1;
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(ii) the "hdid=" parameter in systems with multiple mports can have
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destination ID assignments omitted from the end of list (default = -1).
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@ -317,8 +325,7 @@ must ensure that they are loaded before the enumeration/discovery starts.
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This process can be automated by specifying pre- or post- dependencies in the
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RapidIO-specific modprobe configuration file as shown in the example below.
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File /etc/modprobe.d/rapidio.conf:
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----------------------------------
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File /etc/modprobe.d/rapidio.conf::
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# Configure RapidIO subsystem modules
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@ -335,17 +342,21 @@ RapidIO-specific modprobe configuration file as shown in the example below.
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--------------------------
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NOTE: In the example above, one of "softdep" commands must be removed or
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commented out to keep required module loading sequence.
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NOTE:
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In the example above, one of "softdep" commands must be removed or
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commented out to keep required module loading sequence.
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A. References
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-------------
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5. References
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=============
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[1] RapidIO Trade Association. RapidIO Interconnect Specifications.
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http://www.rapidio.org.
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[2] Rapidio TA. Technology Comparisons.
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http://www.rapidio.org/education/technology_comparisons/
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[3] RapidIO support for Linux.
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http://lwn.net/Articles/139118/
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[4] Matt Porter. RapidIO for Linux. Ottawa Linux Symposium, 2005
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http://www.kernel.org/doc/ols/2005/ols2005v2-pages-43-56.pdf
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@ -1,13 +1,10 @@
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==========================================================================
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RapidIO subsystem Channelized Messaging character device driver (rio_cm.c)
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==========================================================================
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Version History:
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----------------
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1.0.0 - Initial driver release.
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==========================================================================
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I. Overview
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1. Overview
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===========
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This device driver is the result of collaboration within the RapidIO.org
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Software Task Group (STG) between Texas Instruments, Prodrive Technologies,
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@ -41,79 +38,98 @@ in /dev directory common for all registered RapidIO mport devices.
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Following ioctl commands are available to user-space applications:
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- RIO_CM_MPORT_GET_LIST : Returns to caller list of local mport devices that
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- RIO_CM_MPORT_GET_LIST:
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Returns to caller list of local mport devices that
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support messaging operations (number of entries up to RIO_MAX_MPORTS).
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Each list entry is combination of mport's index in the system and RapidIO
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destination ID assigned to the port.
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- RIO_CM_EP_GET_LIST_SIZE : Returns number of messaging capable remote endpoints
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- RIO_CM_EP_GET_LIST_SIZE:
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Returns number of messaging capable remote endpoints
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in a RapidIO network associated with the specified mport device.
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- RIO_CM_EP_GET_LIST : Returns list of RapidIO destination IDs for messaging
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- RIO_CM_EP_GET_LIST:
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Returns list of RapidIO destination IDs for messaging
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capable remote endpoints (peers) available in a RapidIO network associated
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with the specified mport device.
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- RIO_CM_CHAN_CREATE : Creates RapidIO message exchange channel data structure
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- RIO_CM_CHAN_CREATE:
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Creates RapidIO message exchange channel data structure
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with channel ID assigned automatically or as requested by a caller.
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- RIO_CM_CHAN_BIND : Binds the specified channel data structure to the specified
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- RIO_CM_CHAN_BIND:
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Binds the specified channel data structure to the specified
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mport device.
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- RIO_CM_CHAN_LISTEN : Enables listening for connection requests on the specified
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- RIO_CM_CHAN_LISTEN:
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Enables listening for connection requests on the specified
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channel.
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- RIO_CM_CHAN_ACCEPT : Accepts a connection request from peer on the specified
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- RIO_CM_CHAN_ACCEPT:
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Accepts a connection request from peer on the specified
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channel. If wait timeout for this request is specified by a caller it is
|
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a blocking call. If timeout set to 0 this is non-blocking call - ioctl
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handler checks for a pending connection request and if one is not available
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exits with -EGAIN error status immediately.
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- RIO_CM_CHAN_CONNECT : Sends a connection request to a remote peer/channel.
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- RIO_CM_CHAN_SEND : Sends a data message through the specified channel.
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- RIO_CM_CHAN_CONNECT:
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Sends a connection request to a remote peer/channel.
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- RIO_CM_CHAN_SEND:
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Sends a data message through the specified channel.
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The handler for this request assumes that message buffer specified by
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a caller includes the reserved space for a packet header required by
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this driver.
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- RIO_CM_CHAN_RECEIVE : Receives a data message through a connected channel.
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- RIO_CM_CHAN_RECEIVE:
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Receives a data message through a connected channel.
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If the channel does not have an incoming message ready to return this ioctl
|
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handler will wait for new message until timeout specified by a caller
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expires. If timeout value is set to 0, ioctl handler uses a default value
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defined by MAX_SCHEDULE_TIMEOUT.
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- RIO_CM_CHAN_CLOSE : Closes a specified channel and frees associated buffers.
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- RIO_CM_CHAN_CLOSE:
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Closes a specified channel and frees associated buffers.
|
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If the specified channel is in the CONNECTED state, sends close notification
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to the remote peer.
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The ioctl command codes and corresponding data structures intended for use by
|
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user-space applications are defined in 'include/uapi/linux/rio_cm_cdev.h'.
|
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|
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II. Hardware Compatibility
|
||||
2. Hardware Compatibility
|
||||
=========================
|
||||
|
||||
This device driver uses standard interfaces defined by kernel RapidIO subsystem
|
||||
and therefore it can be used with any mport device driver registered by RapidIO
|
||||
subsystem with limitations set by available mport HW implementation of messaging
|
||||
mailboxes.
|
||||
|
||||
III. Module parameters
|
||||
3. Module parameters
|
||||
====================
|
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|
||||
- 'dbg_level' - This parameter allows to control amount of debug information
|
||||
- 'dbg_level'
|
||||
- This parameter allows to control amount of debug information
|
||||
generated by this device driver. This parameter is formed by set of
|
||||
bit masks that correspond to the specific functional block.
|
||||
For mask definitions see 'drivers/rapidio/devices/rio_cm.c'
|
||||
This parameter can be changed dynamically.
|
||||
Use CONFIG_RAPIDIO_DEBUG=y to enable debug output at the top level.
|
||||
|
||||
- 'cmbox' - Number of RapidIO mailbox to use (default value is 1).
|
||||
- 'cmbox'
|
||||
- Number of RapidIO mailbox to use (default value is 1).
|
||||
This parameter allows to set messaging mailbox number that will be used
|
||||
within entire RapidIO network. It can be used when default mailbox is
|
||||
used by other device drivers or is not supported by some nodes in the
|
||||
RapidIO network.
|
||||
|
||||
- 'chstart' - Start channel number for dynamic assignment. Default value - 256.
|
||||
- 'chstart'
|
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- Start channel number for dynamic assignment. Default value - 256.
|
||||
Allows to exclude channel numbers below this parameter from dynamic
|
||||
allocation to avoid conflicts with software components that use
|
||||
reserved predefined channel numbers.
|
||||
|
||||
IV. Known problems
|
||||
4. Known problems
|
||||
=================
|
||||
|
||||
None.
|
||||
|
||||
V. User-space Applications and API Library
|
||||
5. User-space Applications and API Library
|
||||
==========================================
|
||||
|
||||
Messaging API library and applications that use this device driver are available
|
||||
from RapidIO.org.
|
||||
|
||||
VI. TODO List
|
||||
6. TODO List
|
||||
============
|
||||
|
||||
- Add support for system notification messages (reserved channel 0).
|
||||
@ -1,3 +1,7 @@
|
||||
=============
|
||||
Sysfs entries
|
||||
=============
|
||||
|
||||
The RapidIO sysfs files have moved to:
|
||||
Documentation/ABI/testing/sysfs-bus-rapidio and
|
||||
Documentation/ABI/testing/sysfs-class-rapidio
|
||||
@ -1,7 +1,9 @@
|
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=========================================================================
|
||||
RapidIO subsystem mport driver for IDT Tsi721 PCI Express-to-SRIO bridge.
|
||||
=========================================================================
|
||||
|
||||
I. Overview
|
||||
1. Overview
|
||||
===========
|
||||
|
||||
This driver implements all currently defined RapidIO mport callback functions.
|
||||
It supports maintenance read and write operations, inbound and outbound RapidIO
|
||||
@ -17,7 +19,9 @@ into the corresponding message queue. Messaging callbacks are implemented to be
|
||||
fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
|
||||
|
||||
1. Module parameters:
|
||||
- 'dbg_level' - This parameter allows to control amount of debug information
|
||||
|
||||
- 'dbg_level'
|
||||
- This parameter allows to control amount of debug information
|
||||
generated by this device driver. This parameter is formed by set of
|
||||
This parameter can be changed bit masks that correspond to the specific
|
||||
functional block.
|
||||
@ -25,37 +29,44 @@ fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
|
||||
This parameter can be changed dynamically.
|
||||
Use CONFIG_RAPIDIO_DEBUG=y to enable debug output at the top level.
|
||||
|
||||
- 'dma_desc_per_channel' - This parameter defines number of hardware buffer
|
||||
- 'dma_desc_per_channel'
|
||||
- This parameter defines number of hardware buffer
|
||||
descriptors allocated for each registered Tsi721 DMA channel.
|
||||
Its default value is 128.
|
||||
|
||||
- 'dma_txqueue_sz' - DMA transactions queue size. Defines number of pending
|
||||
- 'dma_txqueue_sz'
|
||||
- DMA transactions queue size. Defines number of pending
|
||||
transaction requests that can be accepted by each DMA channel.
|
||||
Default value is 16.
|
||||
|
||||
- 'dma_sel' - DMA channel selection mask. Bitmask that defines which hardware
|
||||
- 'dma_sel'
|
||||
- DMA channel selection mask. Bitmask that defines which hardware
|
||||
DMA channels (0 ... 6) will be registered with DmaEngine core.
|
||||
If bit is set to 1, the corresponding DMA channel will be registered.
|
||||
DMA channels not selected by this mask will not be used by this device
|
||||
driver. Default value is 0x7f (use all channels).
|
||||
|
||||
- 'pcie_mrrs' - override value for PCIe Maximum Read Request Size (MRRS).
|
||||
- 'pcie_mrrs'
|
||||
- override value for PCIe Maximum Read Request Size (MRRS).
|
||||
This parameter gives an ability to override MRRS value set during PCIe
|
||||
configuration process. Tsi721 supports read request sizes up to 4096B.
|
||||
Value for this parameter must be set as defined by PCIe specification:
|
||||
0 = 128B, 1 = 256B, 2 = 512B, 3 = 1024B, 4 = 2048B and 5 = 4096B.
|
||||
Default value is '-1' (= keep platform setting).
|
||||
|
||||
- 'mbox_sel' - RIO messaging MBOX selection mask. This is a bitmask that defines
|
||||
- 'mbox_sel'
|
||||
- RIO messaging MBOX selection mask. This is a bitmask that defines
|
||||
messaging MBOXes are managed by this device driver. Mask bits 0 - 3
|
||||
correspond to MBOX0 - MBOX3. MBOX is under driver's control if the
|
||||
corresponding bit is set to '1'. Default value is 0x0f (= all).
|
||||
|
||||
II. Known problems
|
||||
2. Known problems
|
||||
=================
|
||||
|
||||
None.
|
||||
|
||||
III. DMA Engine Support
|
||||
3. DMA Engine Support
|
||||
=====================
|
||||
|
||||
Tsi721 mport driver supports DMA data transfers between local system memory and
|
||||
remote RapidIO devices. This functionality is implemented according to SLAVE
|
||||
@ -68,17 +79,21 @@ One BDMA channel is reserved for generation of maintenance read/write requests.
|
||||
|
||||
If Tsi721 mport driver have been built with RAPIDIO_DMA_ENGINE support included,
|
||||
this driver will accept DMA-specific module parameter:
|
||||
"dma_desc_per_channel" - defines number of hardware buffer descriptors used by
|
||||
|
||||
"dma_desc_per_channel"
|
||||
- defines number of hardware buffer descriptors used by
|
||||
each BDMA channel of Tsi721 (by default - 128).
|
||||
|
||||
IV. Version History
|
||||
4. Version History
|
||||
|
||||
1.1.0 - DMA operations re-worked to support data scatter/gather lists larger
|
||||
===== ====================================================================
|
||||
1.1.0 DMA operations re-worked to support data scatter/gather lists larger
|
||||
than hardware buffer descriptors ring.
|
||||
1.0.0 - Initial driver release.
|
||||
1.0.0 Initial driver release.
|
||||
===== ====================================================================
|
||||
|
||||
V. License
|
||||
-----------------------------------------------
|
||||
5. License
|
||||
===========
|
||||
|
||||
Copyright(c) 2011 Integrated Device Technology, Inc. All rights reserved.
|
||||
|
||||
@ -86,7 +86,7 @@ config RAPIDIO_CHMAN
|
||||
This option includes RapidIO channelized messaging driver which
|
||||
provides socket-like interface to allow sharing of single RapidIO
|
||||
messaging mailbox between multiple user-space applications.
|
||||
See "Documentation/rapidio/rio_cm.txt" for driver description.
|
||||
See "Documentation/rapidio/rio_cm.rst" for driver description.
|
||||
|
||||
config RAPIDIO_MPORT_CDEV
|
||||
tristate "RapidIO /dev mport device driver"
|
||||
|
||||
Loading…
Reference in New Issue
Block a user