linux-kernel - Re: [PATCH net-next 0/4] net: ipa: IPA v4.5 aggregation and Qtime

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Message-ID: <20201201181655.6ddbc44a@kicinski-fedora-pc1c0hjn.DHCP.thefacebook.com>
Date:   Tue, 1 Dec 2020 18:16:55 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alex Elder <elder@...aro.org>
Cc:     davem@...emloft.net, evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 0/4] net: ipa: IPA v4.5 aggregation and Qtime

On Mon, 30 Nov 2020 17:37:08 -0600 Alex Elder wrote:
> This series updates some IPA register definitions that change in
> substantive ways for IPA v4.5.
> 
> One register defines parameters used by an endpoint to aggregate
> multiple packets into a buffer.  The size and position of most
> fields in that register have changed with this new hardware version,
> and consequently the function that programs it needs to be done a
> bit differently.  The first patch takes care of this.
> 
> Second, IPA v4.5 introduces a unified time keeping component to be
> used in several places by the IPA hardware.  A main clock divider
> provides a fundamental tick rate, and several timestamped features 
> now define their granularity based on that.  There is also a set of
> "pulse generators" derived from the main tick, and these are used
> to implement timers used for aggregation and head-of-line block
> avoidance.  The second patch adds IPA register updates to support
> Qtime along with its configuration, and the last two patches
> configure the timers that use it.

Applied, thanks!