Message-ID: <cd61963d-eb4c-9a4f-d48f-7a633bfd4be3@quicinc.com>
Date:   Thu, 23 Feb 2023 15:13:20 -0800
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Subject: Re: [PATCH v10 08/26] gunyah: rsc_mgr: Add resource manager RPC core
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To:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Alex Elder <elder@linaro.org>,
        Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>
CC:     Murali Nalajala <quic_mnalajal@quicinc.com>,
        Trilok Soni <quic_tsoni@quicinc.com>,
        Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
        Carl van Schaik <quic_cvanscha@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Bjorn Andersson <andersson@kernel.org>,
        "Konrad Dybcio" <konrad.dybcio@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>,
        "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Jassi Brar <jassisinghbrar@gmail.com>,
        <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <linux-doc@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <20230214211229.3239350-1-quic_eberman@quicinc.com>
 <20230214212327.3310128-1-quic_eberman@quicinc.com>
 <d69f9699-b4d9-7a3a-71b1-7e6fe72c4f82@linaro.org>
 <94ebe2f0-0baf-21c0-45d5-c5bc4df9ad94@quicinc.com>
 <44a59ea4-da6e-e96a-5e89-dfd41db72823@linaro.org>
From:   Elliot Berman <quic_eberman@quicinc.com>
In-Reply-To: <44a59ea4-da6e-e96a-5e89-dfd41db72823@linaro.org>
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On 2/23/2023 2:29 AM, Srinivas Kandagatla wrote:
> 
> 
> On 22/02/2023 23:18, Elliot Berman wrote:
>>>>
>>>> +EXPORT_SYMBOL_GPL(gh_rm_notifier_unregister);
>>>> +
>>>> +void get_gh_rm(struct gh_rm *rm)
>>>> +{
>>>> +    get_device(rm->dev);
>>>> +}
>>>> +EXPORT_SYMBOL_GPL(get_gh_rm);
>>>
>>> Can we have some consistency in the exported symbol naming,
>>> we have two combinations now.
>>>
>>> EXPORT_SYMBOL_GPL(gh_rm_notifier_register);
>>> EXPORT_SYMBOL_GPL(get_gh_rm);
>>>
>>> lets stick to one.
>>
>> done.
>>
>>>> +
>>>> +void put_gh_rm(struct gh_rm *rm)
>>>> +{
>>>> +    put_device(rm->dev);
>>>> +}
>>>> +EXPORT_SYMBOL_GPL(put_gh_rm);
>>>>
>>> ...
>>>
>>>> +
>>>> +static int gh_rm_drv_probe(struct platform_device *pdev)
>>>> +{
>>>> +    struct gh_msgq_tx_data *msg;
>>>> +    struct gh_rm *rm;
>>>> +    int ret;
>>>> +
>>> How are we ensuring that gunyah driver is probed before this driver?
>>>
>>>
>>
>> Which driver?
> 
> Am referring to gunyah.ko
> 
> TBH, gunyah.c should be merged as part of resource manager, and check if 
> uuids and features in probe before proceeding further.
> 


Ah -- gunyah_rsc_mgr.ko has symbol dependency on gunyah-msgq.ko. 
gunyah-msgq.ko has symbol dependency on gunyah.ko. gunyah.ko doesn't 
have any probe and does all its work on module_init.

In order to merge gunyah.c with resource manager, I would need to 
incorporate message queue mailbox into resource manager. IMO, this 
rapidly moves towards a mega-module which was discouraged previously.

Thanks,
Elliot