linux-kernel - Re: [PATCH v2] mmc: card: Skip secure option for MoviNAND.

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Message-ID: <CAH9JG2WgBa29dT2Vm5ULyMYSsQ=d+8ViXi=q_LQqWudJK3OwXA@mail.gmail.com>
Date:	Tue, 14 Aug 2012 13:10:06 +0900
From:	Kyungmin Park <kyungmin.park@...sung.com>
To:	IAN CHEN <ian.cy.chen@...sung.com>
Cc:	cjb@...top.org, linkinjeon@...il.com, adrian.hunter@...el.com,
	subhashj@...eaurora.org, linus.walleij@...aro.org,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	d.j.shin@...sung.com, jongtae22.kim@...sung.com,
	jh80.chung@...sung.com
Subject: Re: [PATCH v2] mmc: card: Skip secure option for MoviNAND.

Hi Ian,

"MMC_QUIRK_SKIP_SECURE"? It seems it support secure discard but want
to skip. but it's wrong. it's broken feature at listed MoviNAND.
As linus suggested, SECURE_BROKEN is better.

Thank you,
Kyungmin Park

On 8/14/12, IAN CHEN <ian.cy.chen@...sung.com> wrote:
> For several MoviNAND, there are some known issue with secure option.
> For these specific MoviNAND device, we skip secure option.
>
> Signed-off-by: Ian Chen <ian.cy.chen@...sung.com>
> ---
>  drivers/mmc/card/block.c |   24 +++++++++++++++++++++++-
>  include/linux/mmc/card.h |    1 +
>  2 files changed, 24 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index f1c84de..a01cc14 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -1411,7 +1411,8 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq,
> struct request *req)
>  		/* complete ongoing async transfer before issuing discard */
>  		if (card->host->areq)
>  			mmc_blk_issue_rw_rq(mq, NULL);
> -		if (req->cmd_flags & REQ_SECURE)
> +		if (req->cmd_flags & REQ_SECURE &&
> +			!(card->quirks & MMC_QUIRK_SKIP_SECURE))
>  			ret = mmc_blk_issue_secdiscard_rq(mq, req);
>  		else
>  			ret = mmc_blk_issue_discard_rq(mq, req);
> @@ -1716,6 +1717,7 @@ force_ro_fail:
>  #define CID_MANFID_SANDISK	0x2
>  #define CID_MANFID_TOSHIBA	0x11
>  #define CID_MANFID_MICRON	0x13
> +#define CID_MANFID_SAMSUNG	0x15
>
>  static const struct mmc_fixup blk_fixups[] =
>  {
> @@ -1752,6 +1754,26 @@ static const struct mmc_fixup blk_fixups[] =
>  	MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
>  		  MMC_QUIRK_LONG_READ_TIME),
>
> +	/*
> +	 * Some issue about secure erase/secure trim for Samsung MoviNAND
> +	 */
> +	MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +	MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
> +		  MMC_QUIRK_MOVINAND_SECURE),
> +
>  	END_FIXUP
>  };
>
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index 111aca5..b639a92 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -239,6 +239,7 @@ struct mmc_card {
>  #define MMC_QUIRK_BLK_NO_CMD23	(1<<7)		/* Avoid CMD23 for regular
> multiblock */
>  #define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8)	/* Avoid sending 512
> bytes in */
>  #define MMC_QUIRK_LONG_READ_TIME (1<<9)		/* Data read time > CSD says */
> +#define MMC_QUIRK_SKIP_SECURE (1<<10)		/* Skip secure for erase/trim */
>  						/* byte mode */
>  	unsigned int    poweroff_notify_state;	/* eMMC4.5 notify feature */
>  #define MMC_NO_POWER_NOTIFICATION	0
> --
> 1.7.0.4
> --
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