linux-kernel - Re: [PATCH 0/4] Introduction of rpmsg_rx

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Date:   Tue, 26 Jul 2022 11:51:18 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Chris Lew <quic_clew@...cinc.com>
Cc:     bjorn.andersson@...aro.org, linux-remoteproc@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] Introduction of rpmsg_rx_done

On Tue, Jun 07, 2022 at 06:16:41PM -0700, Chris Lew wrote:
> This series proposes an implementation for the rpmsg framework to do
> deferred cleanup of buffers provided in the rx callback. The current
> implementation assumes that the client is done with the buffer after
> returning from the rx callback.
> 
> In some cases where the data size is large, the client may want to
> avoid copying the data in the rx callback for later processing. This
> series proposes two new facilities for signaling that they want to
> hold on to a buffer after the rx callback.
> They are:
>  - New API rpmsg_rx_done() to tell the rpmsg framework the client is
>    done with the buffer
>  - New return codes for the rx callback to signal that the client will
>    hold onto a buffer and later call rpmsg_rx_done()
> 
> This series implements the qcom_glink_native backend for these new
> facilities.
>  
> Chris Lew (4):
>   rpmsg: core: Add rx done hooks
>   rpmsg: char: Add support to use rpmsg_rx_done
>   rpmsg: glink: Try to send rx done in irq
>   rpmsg: glink: Add support for rpmsg_rx_done
> 
>  drivers/rpmsg/qcom_glink_native.c | 112 ++++++++++++++++++++++++++++++--------
>  drivers/rpmsg/rpmsg_char.c        |  50 ++++++++++++++++-
>  drivers/rpmsg/rpmsg_core.c        |  20 +++++++
>  drivers/rpmsg/rpmsg_internal.h    |   1 +
>  include/linux/rpmsg.h             |  24 ++++++++
>  5 files changed, 183 insertions(+), 24 deletions(-)

I have started reviewing this set.  Comments to come later today or tomorrow.

Thanks,
Mathieu

> 
> -- 
> 2.7.4
>