linux-kernel - Re: [PATCH v3 00/12] firewire: deliver hardware time stamp for asynchronous transaction

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Message-ID: <20230529231504.GA20864@workstation.local>
Date:   Tue, 30 May 2023 08:15:04 +0900
From:   Takashi Sakamoto <o-takashi@...amocchi.jp>
To:     linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Cc:     kunit-dev@...glegroups.com
Subject: Re: [PATCH v3 00/12] firewire: deliver hardware time stamp for
 asynchronous transaction

On Mon, May 29, 2023 at 08:33:54PM +0900, Takashi Sakamoto wrote:
> Cc: kunit-dev@...glegroups.com
> 
> Hi,
> 
> This patchset is revised version of the previous one[1], I realized that
> it included wrong version number of Linux kernel. The new series
> includes changes just for it.
> 
> 
> Copied from the initial cover letter:
> 
> 1394 OHCI hardware supports hardware time stamp for asynchronous
> communication at 8,000 Hz resolution (= isochronous cycle), while
> current implementation of FireWire subsystem does not deliver the time
> stamp to both unit driver and user space application when operating the
> asynchronous communication. It is inconvenient to a kind of application
> which attempts to synchronize data from multiple sources by the (coarse)
> time stamp.
> 
> This patchset changes the subsystem so that the unit driver and the user
> space application to receive the time stamp, therefore it affects kernel
> service for asynchronous transaction, kernel API for unit driver, and UAPI
> for user space application.
> 
> [1] https://lore.kernel.org/lkml/20230525101625.888906-1-o-takashi@sakamocchi.jp/
> 
> Takashi Sakamoto (12):
>   firewire: add KUnit test to check layout of UAPI structures
>   firewire: cdev: add new version of ABI to notify time stamp at
>     request/response subaction of transaction
>   firewire: cdev: add new event to notify request subaction with time
>     stamp
>   firewire: cdev: implement new event to notify request subaction with
>     time stamp
>   firewire: core: use union for callback of transaction completion
>   firewire: core: implement variations to send request and wait for
>     response with time stamp
>   firewire: cdev: code refactoring to operate event of response
>   firewire: cdev: add new event to notify response subaction with time
>     stamp
>   firewire: cdev: implement new event to notify response subaction with
>     time stamp
>   firewire: cdev: code refactoring to dispatch event for phy packet
>   firewire: cdev: add new event to notify phy packet with time stamp
>   firewire: cdev: implement new event relevant to phy packet with time
>     stamp
> 
>  drivers/firewire/.kunitconfig       |   4 +
>  drivers/firewire/Kconfig            |  16 ++
>  drivers/firewire/Makefile           |   3 +
>  drivers/firewire/core-cdev.c        | 252 +++++++++++++++++++++-------
>  drivers/firewire/core-transaction.c |  93 +++++++---
>  drivers/firewire/core.h             |   7 +
>  drivers/firewire/ohci.c             |  17 +-
>  drivers/firewire/uapi-test.c        |  87 ++++++++++
>  include/linux/firewire.h            |  82 ++++++++-
>  include/uapi/linux/firewire-cdev.h  | 180 +++++++++++++++++---
>  10 files changed, 625 insertions(+), 116 deletions(-)
>  create mode 100644 drivers/firewire/.kunitconfig
>  create mode 100644 drivers/firewire/uapi-test.c

Applied to for-next branch.

* https://git.kernel.org/ieee1394/linux1394/c/fe971f9163b6


Thanks

Takashi Sakamoto