netdev - Re: [PATCH net-next 0/2] net: ipa: GSI channel flow control

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Message-ID: <20211126100817.09de8f7f@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 26 Nov 2021 10:08:17 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alex Elder <elder@...aro.org>
Cc:     davem@...emloft.net, pkurapat@...eaurora.org,
        avuyyuru@...eaurora.org, bjorn.andersson@...aro.org,
        cpratapa@...eaurora.org, subashab@...eaurora.org,
        evgreen@...omium.org, elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] net: ipa: GSI channel flow control

On Wed, 24 Nov 2021 13:44:14 -0600 Alex Elder wrote:
> Starting with IPA v4.2, endpoint DELAY mode (which prevents data
> transfer on TX endpoints) does not work properly.  To address this,
> changes were made to allow underlying GSI channels to be put into
> a "flow controlled" state, which achieves a similar objective.
> The first patch in this series implements the flow controlled
> channel state and the commands used to control it.  It arranges
> to use the new mechanism--instead of DELAY mode--for IPA v4.2+.
> 
> In IPA v4.11, the notion of GSI channel flow control was enhanced,
> and implemented in a slightly different way.  For the most part this
> doesn't affect the way the IPA driver uses flow control, but the
> second patch adds support for the newer mechanism.

Applied, thanks.