linux-kernel - RE: [PATCH 0/2] mmc: core: Implement support for cache ctrl for SD cards

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Message-ID: <DM6PR04MB657511CDCE94264D080F006CFC549@DM6PR04MB6575.namprd04.prod.outlook.com>
Date:   Mon, 10 May 2021 07:39:57 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     Linus Walleij <linus.walleij@...aro.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 0/2] mmc: core: Implement support for cache ctrl for SD
 cards

> 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,
Avri