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From: Kalle Valo <kvalo@codeaurora.org>
To: Brian Norris <briannorris@chromium.org>
Cc: Jouni Malinen <j@w1.fi>,
	Johannes Berg <johannes@sipsolutions.net>,
	"linux-wireless\@vger.kernel.org"
	<linux-wireless@vger.kernel.org>, Pkshih <pkshih@realtek.com>,
	"ath10k\@lists.infradead.org" <ath10k@lists.infradead.org>,
	Wen Gong <wgong@codeaurora.org>
Subject: Re: [PATCH 1/2] nl80211: vendor-cmd: qca: add dynamic SAR power limits
Date: Fri, 24 Jul 2020 12:26:16 +0300	[thread overview]
Message-ID: <87y2n9clhj.fsf@codeaurora.org> (raw)
In-Reply-To: <CA+ASDXOAzPuOn_rMsRj4t56kC-TgoG0p5WhSTPJjB8xTTq5kfg@mail.gmail.com> (Brian Norris's message of "Thu, 16 Jul 2020 11:56:39 -0700")

Brian Norris <briannorris@chromium.org> writes:

> On Thu, Jul 16, 2020 at 2:35 AM Kalle Valo <kvalo@codeaurora.org> wrote:
>> Brian Norris <briannorris@chromium.org> writes:
>> > Really, I could live with per-vendor APIs. My primary goal is to get
>> > these upstream in some form, so vendors can stop using things like
>> > this as a reason for shipping us non-upstream code, and so we can
>> > reduce the delta between upstream and Chrome OS kernels.
>> >
>> > I also think that, for the cases that warrant it (i.e., the option 2
>> > -- Realtek and Qualcomm cases, so far), it would be good to have a
>> > common API, but that's a somewhat secondary concern for me.
>>
>> So to me it feels like the best solution forward is to go with the
>> vendor API, do you agree? We can, of course, later switch to the common
>> API if we manage to create one which is usable for everyone.
>
> That's fine with me. That's pretty much what I said in my first email:
>
> "Anyway, I don't really object with starting out with a
> Qualcomm-specific and a Realtek-specific vendor command to implement
> nearly the same feature, but I'd prefer if people did engage in some
> healthy discussion about why they can't share an API, with the hopes
> that maybe they can converge someday."
>
> I think we've had some healthy (though very protracted) discussion,
> and I don't think I've seen anyone bring up anything I wasn't already
> aware of that would prevent eventual consolidation. As long as we
> acknowledge those things (item 2 at
> https://wireless.wiki.kernel.org/en/developers/documentation/nl80211#vendor-specific_api),
> I'm happy.

Good, I was just checking that we all are on the same page.

>> > Also, Kalle had some concerns about stable ABI questions: shouldn't we
>> > bake in some kind of "check for support" feature to these kinds of
>> > APIs [3]? That would help ease transition, if we do start with a
>> > vendor API and move to a common one in the future.
>>
>> Yeah, that sounds like a good idea but I don't think that should block
>> these patches.
>
> OK, well it was your concern first, IIRC :)

I was commenting about the "check for support" feature :) I think it
would be a good idea to have userspace check what vendor interface
features/commands are supported with that driver/hardware/firmware
combo. But how should that be implemented? Should there be a some kind
of generic mechanism used by all drivers or would each driver have their
own method to check the supported features? I think that needs a
separate discussion.

> So what's next? A v2 that only needs a bit of updated description
> about "why a vendor API"?

I'm busy but hopefully Wen (CCed) can submit v2. Wen?

> And Realtek can feel free to submit this [1] shortly?

> [1] Series: rtw88: Add SAR implementation
> https://patchwork.kernel.org/project/linux-wireless/list/?series=238219&state=*

Yeah, please submit that as well.

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

WARNING: multiple messages have this Message-ID
From: Kalle Valo <kvalo@codeaurora.org>
To: Brian Norris <briannorris@chromium.org>
Cc: Pkshih <pkshih@realtek.com>, Jouni Malinen <j@w1.fi>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
	"ath10k@lists.infradead.org" <ath10k@lists.infradead.org>,
	Wen Gong <wgong@codeaurora.org>,
	Johannes Berg <johannes@sipsolutions.net>
Subject: Re: [PATCH 1/2] nl80211: vendor-cmd: qca: add dynamic SAR power limits
Date: Fri, 24 Jul 2020 12:26:16 +0300	[thread overview]
Message-ID: <87y2n9clhj.fsf@codeaurora.org> (raw)
In-Reply-To: <CA+ASDXOAzPuOn_rMsRj4t56kC-TgoG0p5WhSTPJjB8xTTq5kfg@mail.gmail.com> (Brian Norris's message of "Thu, 16 Jul 2020 11:56:39 -0700")

Brian Norris <briannorris@chromium.org> writes:

> On Thu, Jul 16, 2020 at 2:35 AM Kalle Valo <kvalo@codeaurora.org> wrote:
>> Brian Norris <briannorris@chromium.org> writes:
>> > Really, I could live with per-vendor APIs. My primary goal is to get
>> > these upstream in some form, so vendors can stop using things like
>> > this as a reason for shipping us non-upstream code, and so we can
>> > reduce the delta between upstream and Chrome OS kernels.
>> >
>> > I also think that, for the cases that warrant it (i.e., the option 2
>> > -- Realtek and Qualcomm cases, so far), it would be good to have a
>> > common API, but that's a somewhat secondary concern for me.
>>
>> So to me it feels like the best solution forward is to go with the
>> vendor API, do you agree? We can, of course, later switch to the common
>> API if we manage to create one which is usable for everyone.
>
> That's fine with me. That's pretty much what I said in my first email:
>
> "Anyway, I don't really object with starting out with a
> Qualcomm-specific and a Realtek-specific vendor command to implement
> nearly the same feature, but I'd prefer if people did engage in some
> healthy discussion about why they can't share an API, with the hopes
> that maybe they can converge someday."
>
> I think we've had some healthy (though very protracted) discussion,
> and I don't think I've seen anyone bring up anything I wasn't already
> aware of that would prevent eventual consolidation. As long as we
> acknowledge those things (item 2 at
> https://wireless.wiki.kernel.org/en/developers/documentation/nl80211#vendor-specific_api),
> I'm happy.

Good, I was just checking that we all are on the same page.

>> > Also, Kalle had some concerns about stable ABI questions: shouldn't we
>> > bake in some kind of "check for support" feature to these kinds of
>> > APIs [3]? That would help ease transition, if we do start with a
>> > vendor API and move to a common one in the future.
>>
>> Yeah, that sounds like a good idea but I don't think that should block
>> these patches.
>
> OK, well it was your concern first, IIRC :)

I was commenting about the "check for support" feature :) I think it
would be a good idea to have userspace check what vendor interface
features/commands are supported with that driver/hardware/firmware
combo. But how should that be implemented? Should there be a some kind
of generic mechanism used by all drivers or would each driver have their
own method to check the supported features? I think that needs a
separate discussion.

> So what's next? A v2 that only needs a bit of updated description
> about "why a vendor API"?

I'm busy but hopefully Wen (CCed) can submit v2. Wen?

> And Realtek can feel free to submit this [1] shortly?

> [1] Series: rtw88: Add SAR implementation
> https://patchwork.kernel.org/project/linux-wireless/list/?series=238219&state=*

Yeah, please submit that as well.

-- 
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

_______________________________________________
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  reply	other threads:[~2020-07-24  9:26 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-18 15:48 [PATCH 0/2] ath10k: SAR power limit vendor command Kalle Valo
2019-12-18 15:48 ` Kalle Valo
2019-12-18 15:48 ` [PATCH 1/2] nl80211: vendor-cmd: qca: add dynamic SAR power limits Kalle Valo
2019-12-18 15:48   ` Kalle Valo
2019-12-19  9:44   ` Pkshih
2019-12-19  9:44     ` Pkshih
2019-12-19 15:48     ` Jouni Malinen
2019-12-19 15:48       ` Jouni Malinen
2019-12-19 18:32       ` Brian Norris
2019-12-19 18:32         ` Brian Norris
2019-12-19 18:55         ` Jouni Malinen
2019-12-19 18:55           ` Jouni Malinen
2019-12-19 23:40           ` Brian Norris
2019-12-19 23:40             ` Brian Norris
2020-03-17 16:54             ` Kalle Valo
2020-03-17 16:54               ` Kalle Valo
2020-03-20 12:55               ` Johannes Berg
2020-03-20 12:55                 ` Johannes Berg
2020-06-02  1:32                 ` Brian Norris
2020-06-02  1:32                   ` Brian Norris
2020-07-16  9:35                   ` Kalle Valo
2020-07-16  9:35                     ` Kalle Valo
2020-07-16 18:56                     ` Brian Norris
2020-07-16 18:56                       ` Brian Norris
2020-07-24  9:26                       ` Kalle Valo [this message]
2020-07-24  9:26                         ` Kalle Valo
2020-07-30 13:24                         ` Johannes Berg
2020-07-30 13:24                           ` Johannes Berg
2020-08-01  1:31                           ` Brian Norris
2020-08-01  1:31                             ` Brian Norris
2020-09-08  5:55                           ` Kalle Valo
2020-09-08  5:55                           ` Kalle Valo
2020-07-30 13:17                   ` Johannes Berg
2020-07-30 13:17                     ` Johannes Berg
2019-12-18 15:48 ` [PATCH 2/2] ath10k: allow dynamic SAR power limits to be configured Kalle Valo
2019-12-18 15:48   ` Kalle Valo
2019-12-19  9:45   ` Pkshih
2019-12-19  9:45     ` Pkshih
2020-04-16  7:38   ` Kalle Valo
2020-04-16  7:38   ` Kalle Valo

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