linux-kernel - [PATCH 0/5] Implement FTW driver

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Message-Id: <1516157443-17716-1-git-send-email-sukadev@linux.vnet.ibm.com>
Date:   Tue, 16 Jan 2018 18:50:38 -0800
From:   Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        mikey@...ling.org, hbabu@...ibm.com, linuxppc-dev@...abs.org,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/5] Implement FTW driver

The Virtual Accelerator Switchboard (VAS) subsystem in the POWER9 processor
provides a low latency Core-to-core wakeup" mechanism which allows a thread
on one core the processor to efficiently send a message to a thread waiting
on another core.

This Fast thread-wakeup (FTW) driver provides user space applications an
interface to the Core-to-core wakeup mechanism. The FTW driver uses the
"external" interfaces provided by the VAS driver to interact with the VAS
hardware.

PATCH 5/5 documents the API.

The ftw-next branch on my github has some initial test cases for the
driver:

	https://github.com/sukadev/linux/tree/ftw-next

Thanks to input from Ben Herrenschmidt, Michael Ellerman, Michael
Neuling and Robert Blackmore.

Sukadev Bhattiprolu (5):
  powerpc/vas: Remove a stray line in Makefile
  powerpc/ftw: Define FTW_SETUP ioctl API
  powerpc/ftw: Implement a simple FTW driver
  powerpc/ftw: Add a couple of trace points
  powerpc/ftw: Document FTW API/usage

 Documentation/powerpc/ftw-api.txt       | 283 +++++++++++++++++++++++++
 MAINTAINERS                             |   8 +
 arch/powerpc/platforms/powernv/Makefile |   1 -
 drivers/misc/Kconfig                    |   1 +
 drivers/misc/Makefile                   |   1 +
 drivers/misc/ftw/Kconfig                |  16 ++
 drivers/misc/ftw/Makefile               |   4 +
 drivers/misc/ftw/ftw-trace.h            |  75 +++++++
 drivers/misc/ftw/ftw.c                  | 352 ++++++++++++++++++++++++++++++++
 include/uapi/misc/ftw.h                 |  31 +++
 10 files changed, 771 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/powerpc/ftw-api.txt
 create mode 100644 drivers/misc/ftw/Kconfig
 create mode 100644 drivers/misc/ftw/Makefile
 create mode 100644 drivers/misc/ftw/ftw-trace.h
 create mode 100644 drivers/misc/ftw/ftw.c
 create mode 100644 include/uapi/misc/ftw.h

-- 
2.7.4