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rapidio: add RapidIO channelized messaging driver

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Add channelized messaging driver to support native RapidIO messaging
exchange between multiple senders/recipients on devices that use kernel
RapidIO subsystem services.

This device driver is the result of collaboration within the RapidIO.org
Software Task Group (STG) between Texas Instruments, Prodrive
Technologies, Nokia Networks, BAE and IDT.  Additional input was
received from other members of RapidIO.org.

The objective was to create a character mode driver interface which
exposes messaging capabilities of RapidIO endpoint devices (mports)
directly to applications, in a manner that allows the numerous and
varied RapidIO implementations to interoperate.

This char mode device driver allows user-space applications to setup
messaging communication channels using single shared RapidIO messaging
mailbox.

By default this driver uses RapidIO MBOX_1 (MBOX_0 is reserved for use by
RIONET Ethernet emulation driver).

[[email protected]: rapidio/rio_cm: fix return value check in riocm_init()]
  Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexandre Bounine <[email protected]>
Tested-by: Barry Wood <[email protected]>
Cc: Matt Porter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: Andre van Herk <[email protected]>
Cc: Barry Wood <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexandre Bounine 2016-08-02 14:06:25 -07:00 • committed by Linus Torvalds
commit b6e8d4aa11
6 changed files with 2574 additions and 0 deletions
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9
drivers/rapidio/Kconfig
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@ -67,6 +67,15 @@ config RAPIDIO_ENUM_BASIC
endchoice
config RAPIDIO_CHMAN
tristate "RapidIO Channelized Messaging driver"
depends on RAPIDIO
help
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.
config RAPIDIO_MPORT_CDEV
tristate "RapidIO /dev mport device driver"
depends on RAPIDIO

1
drivers/rapidio/Makefile
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@ -5,6 +5,7 @@ obj-$(CONFIG_RAPIDIO) += rapidio.o
rapidio-y := rio.o rio-access.o rio-driver.o rio-sysfs.o
obj-$(CONFIG_RAPIDIO_ENUM_BASIC) += rio-scan.o
obj-$(CONFIG_RAPIDIO_CHMAN) += rio_cm.o
obj-$(CONFIG_RAPIDIO) += switches/
obj-$(CONFIG_RAPIDIO) += devices/

2366
drivers/rapidio/rio_cm.c Normal file
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