linux-kernel - Re: [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA

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Message-ID: <3a596fce-9aa3-e2eb-7920-4ada65f8d2ee@ieee.org>
Date:   Thu, 11 Feb 2021 14:27:01 -0600
From:   Alex Elder <elder@...e.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>, elder@...nel.org
Cc:     bjorn.andersson@...aro.org, agross@...nel.org, davem@...emloft.net,
        kuba@...nel.org, linux-arm-msm@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, konrad.dybcio@...ainline.org,
        marijn.suijten@...ainline.org, phone-devel@...r.kernel.org
Subject: Re: [PATCH v1 0/7] Add support for IPA v3.1, GSI v1.0, MSM8998 IPA

On 2/11/21 11:50 AM, AngeloGioacchino Del Regno wrote:
> Hey all!
> 
> This time around I thought that it would be nice to get some modem
> action going on. We have it, it's working (ish), so just.. why not.

Thank you for the patches!

I would like to review these carefully but I'm sorry
I won't be able to get to it today, and possibly not
for a few days.  But I *will* review them.

I just want you to know I'm paying attention, though
I'm sort of buried in an important issue right now.

I'm very impressed at how small the patches are though.

					-Alex

> This series adds support for IPA v3.1 (featuring GSI v1.0) and also
> takes account for some bits that are shared with other unimplemented
> IPA v3 variants and it is specifically targeting MSM8998, for which
> support is added.
> 
> Since the userspace isn't entirely ready (as far as I can see) for
> data connection (3g/lte/whatever) through the modem, it was possible
> to only partially test this series.
> Specifically, loading the IPA firmware and setting up the interface
> went just fine, along with a basic setup of the network interface
> that got exposed by this driver.
> 
> With this series, the benefits that I see are:
>   1. The modem doesn't crash anymore when trying to setup a data
>      connection, as now the modem firmware seems to be happy with
>      having IPA initialized and ready;
>   2. Other random modem crashes while picking up LTE home network
>      signal (even just for calling, nothing fancy) seem to be gone.
> 
> These are the reasons why I think that this series is ready for
> upstream action. It's *at least* stabilizing the platform when
> the modem is up.
> 
> This was tested on the F(x)Tec Pro 1 (MSM8998) smartphone.
> 
> AngeloGioacchino Del Regno (7):
>    net: ipa: Add support for IPA v3.1 with GSI v1.0
>    net: ipa: endpoint: Don't read unexistant register on IPAv3.1
>    net: ipa: gsi: Avoid some writes during irq setup for older IPA
>    net: ipa: gsi: Use right masks for GSI v1.0 channels hw param
>    net: ipa: Add support for IPA on MSM8998
>    dt-bindings: net: qcom-ipa: Document qcom,sc7180-ipa compatible
>    dt-bindings: net: qcom-ipa: Document qcom,msm8998-ipa compatible
> 
>   .../devicetree/bindings/net/qcom,ipa.yaml     |   7 +-
>   drivers/net/ipa/Makefile                      |   3 +-
>   drivers/net/ipa/gsi.c                         |  33 +-
>   drivers/net/ipa/gsi_reg.h                     |   5 +
>   drivers/net/ipa/ipa_data-msm8998.c            | 407 ++++++++++++++++++
>   drivers/net/ipa/ipa_data.h                    |   5 +
>   drivers/net/ipa/ipa_endpoint.c                |  26 +-
>   drivers/net/ipa/ipa_main.c                    |  12 +-
>   drivers/net/ipa/ipa_reg.h                     |   3 +
>   drivers/net/ipa/ipa_version.h                 |   1 +
>   10 files changed, 480 insertions(+), 22 deletions(-)
>   create mode 100644 drivers/net/ipa/ipa_data-msm8998.c
>