linux-kernel - Re: [PATCH v7 0/6] soc: qcom: add in-kernel pd-mapper implementation

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Date: Fri, 26 Apr 2024 17:02:06 +0300
From: Alexey Minnekhanov <alexeymin@...tmarketos.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Sibi Sankar <quic_sibis@...cinc.com>,
 Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-remoteproc@...r.kernel.org, Johan Hovold <johan+linaro@...nel.org>,
 Xilin Wu <wuxilin123@...il.com>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: [PATCH v7 0/6] soc: qcom: add in-kernel pd-mapper implementation



On 24.04.2024 12:27, Dmitry Baryshkov wrote:
> Protection domain mapper is a QMI service providing mapping between
> 'protection domains' and services supported / allowed in these domains.
> For example such mapping is required for loading of the WiFi firmware or
> for properly starting up the UCSI / altmode / battery manager support.
> 
> The existing userspace implementation has several issue. It doesn't play
> well with CONFIG_EXTRA_FIRMWARE, it doesn't reread the JSON files if the
> firmware location is changed (or if the firmware was not available at
> the time pd-mapper was started but the corresponding directory is
> mounted later), etc.
> 
> However this configuration is largely static and common between
> different platforms. Provide in-kernel service implementing static
> per-platform data.
> 
> Unlike previous revisions of the patchset, this iteration uses static
> configuration per platform, rather than building it dynamically from the
> list of DSPs being started.
> 
> To: Bjorn Andersson <andersson@...nel.org>
> To: Konrad Dybcio <konrad.dybcio@...aro.org>
> To: Sibi Sankar <quic_sibis@...cinc.com>
> To: Mathieu Poirier <mathieu.poirier@...aro.org>
> Cc: linux-arm-msm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-remoteproc@...r.kernel.org
> Cc: Johan Hovold <johan+linaro@...nel.org>
> Cc: Xilin Wu <wuxilin123@...il.com>
> Cc: "Bryan O'Donoghue" <bryan.odonoghue@...aro.org>
> --
> 
> Changes in v7:
> - Fixed modular build (Steev)
> - Link to v6: https://lore.kernel.org/r/20240422-qcom-pd-mapper-v6-0-f96957d01207@linaro.org
> 
> Changes in v6:
> - Reworked mutex to fix lockdep issue on deregistration
> - Fixed dependencies between PD-mapper and remoteproc to fix modular
>    builds (Krzysztof)
> - Added EXPORT_SYMBOL_GPL to fix modular builds (Krzysztof)
> - Fixed kerneldocs (Krzysztof)
> - Removed extra pr_debug messages (Krzysztof)
> - Fixed wcss build (Krzysztof)
> - Added platforms which do not require protection domain mapping to
>    silence the notice on those platforms
> - Link to v5: https://lore.kernel.org/r/20240419-qcom-pd-mapper-v5-0-e35b6f847e99@linaro.org
> 
> Changes in v5:
> - pdr: drop lock in pdr_register_listener, list_lock is already held (Chris Lew)
> - pd_mapper: reworked to provide static configuration per platform
>    (Bjorn)
> - Link to v4: https://lore.kernel.org/r/20240311-qcom-pd-mapper-v4-0-24679cca5c24@linaro.org
> 
> Changes in v4:
> - Fixed missing chunk, reenabled kfree in qmi_del_server (Konrad)
> - Added configuration for sm6350 (Thanks to Luca)
> - Removed RFC tag (Konrad)
> - Link to v3: https://lore.kernel.org/r/20240304-qcom-pd-mapper-v3-0-6858fa1ac1c8@linaro.org
> 
> Changes in RFC v3:
> - Send start / stop notifications when PD-mapper domain list is changed
> - Reworked the way PD-mapper treats protection domains, register all of
>    them in a single batch
> - Added SC7180 domains configuration based on TCL Book 14 GO
> - Link to v2: https://lore.kernel.org/r/20240301-qcom-pd-mapper-v2-0-5d12a081d9d1@linaro.org
> 
> Changes in RFC v2:
> - Swapped num_domains / domains (Konrad)
> - Fixed an issue with battery not working on sc8280xp
> - Added missing configuration for QCS404
> 

I've tested this series on sdm660 device, with userspace pd-mapper
service disabled, and don't see any regressions - e.g Wi-Fi/BT
still come online and work as before.

Debug logs:
https://paste.sr.ht/~minlexx/bd03db4c582a3275078ce4fd05ea76ce46a52b8e

Missing cdsp_root and adsp_sensors PDs are not currently an issue,
because those are not enabled yet on SDM660 or hard to test, so

Tested-by: Alexey Minnekhanov <alexeymin@...tmarketos.org>

-- 
Regards,
Alexey Minnekhanov
postmarketOS developer