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From: Ulf Hansson <ulf.hansson@linaro.org>
To: Avri Altman <Avri.Altman@wdc.com>
Cc: "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	Masami Hiramatsu <masami.hiramatsu@linaro.org>,
	"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/2] mmc: core: Implement support for cache ctrl for SD cards
Date: Mon, 10 May 2021 11:44:10 +0200	[thread overview]
Message-ID: <CAPDyKFqQe5aYqF6iNppY66EfkVNPce_sRF6NJgSn26Rs=_=jxw@mail.gmail.com> (raw)
In-Reply-To: <DM6PR04MB657511CDCE94264D080F006CFC549@DM6PR04MB6575.namprd04.prod.outlook.com>

On Mon, 10 May 2021 at 09:40, Avri Altman <Avri.Altman@wdc.com> wrote:
>
> > In the SD spec v6.x the SD function extension registers for performance
> > enhancements were introduced. As a part of this an optional internal cache
> > on
> > the SD card can be used to improve performance.
> Just to verify that you are aware of that:
> In addition to the extension Registers that were defined in the physical core spec,
> there was a separate document that was released that suggest a common OS API's to those registers.
> It is called "SD specification part A5, SD Extensions API specification".

Thanks for the pointer!

I did have a very brief look at this. The conclusion I made is that
this is way over designed to enable support for features like cache
and poweroff notification. However, there may be other use cases that
could benefit from a user space library, along the lines of the SD
Extensions API, but I can't really tell.

Do you have an interest around this that you can share?

Thanks for reviewing!

Kind regards
Uffe

  reply	other threads:[~2021-05-10  9:44 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 14:58 Ulf Hansson
2021-05-06 14:58 ` [PATCH 1/2] mmc: core: Move eMMC cache flushing to a new bus_ops callback Ulf Hansson
2021-05-07  7:15   ` Avri Altman
2021-05-09 18:48   ` Linus Walleij
2021-05-06 14:58 ` [PATCH 2/2] mmc: core: Add support for cache ctrl for SD cards Ulf Hansson
2021-05-09 19:01   ` Linus Walleij
2021-05-10 14:32     ` Ulf Hansson
2021-05-10  9:10   ` Avri Altman
2021-05-10 10:41     ` Avri Altman
2021-05-10 14:41     ` Ulf Hansson
2021-05-11  8:22       ` Avri Altman
2021-05-10  7:39 ` [PATCH 0/2] mmc: core: Implement " Avri Altman
2021-05-10  9:44   ` Ulf Hansson [this message]
2021-05-10 10:12     ` Avri Altman

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