linux-kernel - RE: [PATCH v2] mmc: core: SD: Add BROKEN-SD-DISCARD quirk

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Date:   Tue, 4 Oct 2022 12:57:12 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
CC:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] mmc: core: SD: Add BROKEN-SD-DISCARD quirk

> > Ulf hi,
> > I would appreciate if you could take a 2nd look at this, So it would
> > make it to 6.1.
> 
> I am preparing the pull request for v6.1-rc1, so this won't be part of that.
> 
> Although, we can still queue this as a fix for v6.1-rc2 - and we should also tag
> this for stable kernels, right!?
Yes.  Thanks a lot.
Avri

> 
> >
> > Thanks,
> > Avri
> >
> 
> Kind regards
> Uffe
> 
> 
> > > v1 -> v2:
> > >  - Address Ulf's suggestions
> > >
> > > Some SD-cards that are SDA-6.0 compliant reports they supports
> > > discard while they actually don't.  This might cause mk2fs to fail
> > > while trying to format the card and revert it to a read-only mode.
> > >
> > > While at it, add SD MID for SANDISK. This is because eMMC MID is
> > > assign by JEDEC and SD MID is assigned by SD 3c-LLC.
> > >
> > > Signed-off-by: Avri Altman <avri.altman@....com>
> > > ---
> > >  drivers/mmc/core/block.c  | 6 +++++-
> > >  drivers/mmc/core/card.h   | 6 ++++++
> > >  drivers/mmc/core/quirks.h | 6 ++++++  include/linux/mmc/card.h  | 1
> > > +
> > >  4 files changed, 18 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> > > index ce89611a136e..54cd009aee50 100644
> > > --- a/drivers/mmc/core/block.c
> > > +++ b/drivers/mmc/core/block.c
> > > @@ -1140,8 +1140,12 @@ static void mmc_blk_issue_discard_rq(struct
> > > mmc_queue *mq, struct request *req)  {
> > >       struct mmc_blk_data *md = mq->blkdata;
> > >       struct mmc_card *card = md->queue.card;
> > > +     unsigned int arg = card->erase_arg;
> > >
> > > -     mmc_blk_issue_erase_rq(mq, req, MMC_BLK_DISCARD, card-
> > > >erase_arg);
> > > +     if (mmc_card_broken_sd_discard(card))
> > > +             arg = SD_ERASE_ARG;
> > > +
> > > +     mmc_blk_issue_erase_rq(mq, req, MMC_BLK_DISCARD, arg);
> > >  }
> > >
> > >  static void mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, diff
> > > --git a/drivers/mmc/core/card.h b/drivers/mmc/core/card.h index
> > > 99045e138ba4..cfdd1ff40b86 100644
> > > --- a/drivers/mmc/core/card.h
> > > +++ b/drivers/mmc/core/card.h
> > > @@ -73,6 +73,7 @@ struct mmc_fixup {  #define EXT_CSD_REV_ANY (-1u)
> > >
> > >  #define CID_MANFID_SANDISK      0x2
> > > +#define CID_MANFID_SANDISK_SD   0x3
> > >  #define CID_MANFID_ATP          0x9
> > >  #define CID_MANFID_TOSHIBA      0x11
> > >  #define CID_MANFID_MICRON       0x13
> > > @@ -258,4 +259,9 @@ static inline int mmc_card_broken_hpi(const
> > > struct mmc_card *c)
> > >       return c->quirks & MMC_QUIRK_BROKEN_HPI;  }
> > >
> > > +static inline int mmc_card_broken_sd_discard(const struct mmc_card
> > > +*c) {
> > > +     return c->quirks & MMC_QUIRK_BROKEN_SD_DISCARD; }
> > > +
> > >  #endif
> > > diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h
> > > index be4393988086..29b9497936df 100644
> > > --- a/drivers/mmc/core/quirks.h
> > > +++ b/drivers/mmc/core/quirks.h
> > > @@ -100,6 +100,12 @@ static const struct mmc_fixup __maybe_unused
> > > mmc_blk_fixups[] = {
> > >       MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY,
> > > add_quirk_mmc,
> > >                 MMC_QUIRK_TRIM_BROKEN),
> > >
> > > +     /*
> > > +      * Some SD cards reports discard support while they don't
> > > +      */
> > > +     MMC_FIXUP(CID_NAME_ANY, CID_MANFID_SANDISK_SD, 0x5344,
> > > add_quirk_sd,
> > > +               MMC_QUIRK_BROKEN_SD_DISCARD),
> > > +
> > >       END_FIXUP
> > >  };
> > >
> > > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> > > index 8a30de08e913..c726ea781255 100644
> > > --- a/include/linux/mmc/card.h
> > > +++ b/include/linux/mmc/card.h
> > > @@ -293,6 +293,7 @@ struct mmc_card {  #define
> > > MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx
> could
> > > create a fake interrupt */
> > >  #define MMC_QUIRK_TRIM_BROKEN        (1<<12)         /* Skip trim */
> > >  #define MMC_QUIRK_BROKEN_HPI (1<<13)         /* Disable broken HPI
> > > support */
> > > +#define MMC_QUIRK_BROKEN_SD_DISCARD  (1<<14) /* Disable broken SD
> > > discard support */
> > >
> > >       bool                    reenable_cmdq;  /* Re-enable Command Queue
> > > */
> > >
> > > --
> > > 2.17.1
> >