linux-kernel - Re: [PATCH] mmc: core: Apply trim broken quirk to R1J57L

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Date:   Thu, 21 Jan 2021 14:25:51 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Wang, Xiaolei" <Xiaolei.Wang@...driver.com>,
        Fabio Estevam <festevam@...il.com>,
        Haibo Chen <haibo.chen@....com>
Cc:     Pali Rohár <pali@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: core: Apply trim broken quirk to R1J57L

+ Fabio, Haibo

On Thu, 21 Jan 2021 at 10:54, Wang, Xiaolei <Xiaolei.Wang@...driver.com> wrote:
>
> Hi
>
> >Are you sure this is an eMMC problem and not a mmc host driver issue?
>
> >Can you elaborate more what happens?
>
> When I use the mkfs.f2fs tool to format the eMMC file system on the imx8qxp board,
> because mkfs.f2fs will use secdiscard first, when entering mmc_blk_issue_secdiscard_rq erase,
> once the parameters are passed into MMC_SECURE_TRIM1_ARG, this function will take a long time to return .
> The program has not ended, has been in TASK_UNINTERRUPTIBLE state.
>
> I compared the mkfs.ext4 tool to format the file system. Because it directly uses mmc_blk_issue_discard_rq,
> this is a normal formatting phenomenon.
>
> mmc_blk_issue_secdiscard_rq and mmc_blk_issue_discard_rq are just different commands and parameters sent by the host as a bus.
>  I did not see the description of trim in the data sheet. Could the host driver cause this problem?

Yes, it can - and we have had issues like these before. So before
adding a card quirk, I think we need to make sure this isn't the case.

When using MMC_SECURE_TRIM1_ARG, it's very likely that the request
takes longer to complete.

The mmc host is responsible for either dealing with busy detection
with the help of its HW/controller - or if that can't be supported,
the mmc core falls back to polling the card for busy with a CMD13.

See mmc_do_erase() in /drivers/mmc/core/core.c

>
> Note:
> The host driver I use is sdhci-esdhc-imx.c

Alright, I have looped in Fabio and Haibo that knows this driver,
let's see if they can help.

>
> Thanks
> Xiaolei

Kind regards
Uffe

>
> -----Original Message-----
> From: Ulf Hansson <ulf.hansson@...aro.org>
> Sent: Wednesday, January 20, 2021 9:41 PM
> To: Wang, Xiaolei <Xiaolei.Wang@...driver.com>
> Cc: Pali Rohár <pali@...nel.org>; Lee Jones <lee.jones@...aro.org>; linux-mmc@...r.kernel.org; Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
> Subject: Re: [PATCH] mmc: core: Apply trim broken quirk to R1J57L
>
> [Please note this e-mail is from an EXTERNAL e-mail address]
>
> On Mon, 18 Jan 2021 at 05:27, Xiaolei Wang <xiaolei.wang@...driver.com> wrote:
> >
> > R1J57L mmc chip hw capibility indicates that it supports trim
> > function, but this function does not work properly, the SDIO bus does
> > not respond, and the IO has been waiting so set quirks to skip trim
>
> Are you sure this is an eMMC problem and not a mmc host driver issue?
>
> Can you elaborate more what happens?
>
> Kind regards
> Uffe
>
> >
> > Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>
> > ---
> >  drivers/mmc/core/quirks.h | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
> > index d68e6e513a4f..63e02391c133 100644
> > --- a/drivers/mmc/core/quirks.h
> > +++ b/drivers/mmc/core/quirks.h
> > @@ -89,6 +89,8 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = {
> >                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
> >         MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> >                   MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
> > +       MMC_FIXUP("R1J57L", CID_MANFID_MICRON, CID_OEMID_ANY, add_quirk_mmc,
> > +                 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
> >
> >         /*
> >          *  On Some Kingston eMMCs, performing trim can result in @@
> > -98,6 +100,8 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = {
> >                   MMC_QUIRK_TRIM_BROKEN),
> >         MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
> >                   MMC_QUIRK_TRIM_BROKEN),
> > +       MMC_FIXUP("R1J57L", CID_MANFID_MICRON, CID_OEMID_ANY, add_quirk_mmc,
> > +                 MMC_QUIRK_TRIM_BROKEN),
> >
> >         END_FIXUP
> >  };
> > --
> > 2.25.1
> >