linux-kernel - Re: [PATCH v5 0002/0003] mmc: Replace "enhanced_area_en" attribute by "partition_setting

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Date:	Mon, 15 Sep 2014 13:20:36 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	Grégory Soutadé <gsoutade@...tion.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Chris Ball <chris@...ntf.net>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 0002/0003] mmc: Replace "enhanced_area_en" attribute by
 "partition_setting_completed"

On 09/12/2014 11:31 PM, Grégory Soutadé wrote:
> Replace ext_csd "enhanced_area_en" attribute by
>  "partition_setting_completed". It was used whether or
>  not enhanced user area is defined and without checks of
>  EXT_CSD_PARTITION_SETTING_COMPLETED bit.
> 
> Signed-off-by: Grégory Soutadé <gsoutade@...tion.com>
> ---
>  drivers/mmc/core/mmc.c   |   14 +++++++++-----
>  include/linux/mmc/card.h |    2 +-
>  include/linux/mmc/mmc.h  |    2 ++
>  3 files changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 77b4cf3..d8d3aef 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -314,7 +314,6 @@ static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd)
>  		hc_wp_grp_sz =
>  			ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
> 
> -		card->ext_csd.enhanced_area_en = 1;
>  		/*
>  		 * calculate the enhanced data area offset, in bytes
>  		 */
> @@ -355,13 +354,11 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd)
>  	 */
>  	if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
>  	    EXT_CSD_PART_SUPPORT_PART_EN) {
> -		if (card->ext_csd.enhanced_area_en != 1) {
> +		if (card->ext_csd.partition_setting_completed) {
>  			hc_erase_grp_sz =
>  				ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
>  			hc_wp_grp_sz =
>  				ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
> -
> -			card->ext_csd.enhanced_area_en = 1;
>  		}
> 
>  		for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
> @@ -488,6 +485,13 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
>  		ext_csd[EXT_CSD_TRIM_MULT];
>  	card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
>  	if (card->ext_csd.rev >= 4) {
> +		if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] &
> +		    EXT_CSD_PART_SETTING_COMPLETED) {
> +			card->ext_csd.partition_setting_completed = 1;
> +		} else {
> +			card->ext_csd.partition_setting_completed = 0;
> +		}

I remembered that Ulf mentioned these brackets can be removed.

Best Regards,
Jaehoon Chung
> +
>  		mmc_manage_enhanced_area(card, ext_csd);
> 
>  		mmc_manage_gp_partitions(card, ext_csd);
> @@ -1324,7 +1328,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>  	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
>  	 * bit.  This bit will be lost every time after a reset or power off.
>  	 */
> -	if (card->ext_csd.enhanced_area_en ||
> +	if (card->ext_csd.partition_setting_completed ||
>  	    (card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
>  		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>  				 EXT_CSD_ERASE_GROUP_DEF, 1,
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index d424b9d..38175be 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -74,7 +74,7 @@ struct mmc_ext_csd {
>  	unsigned int		sec_trim_mult;	/* Secure trim multiplier  */
>  	unsigned int		sec_erase_mult;	/* Secure erase multiplier */
>  	unsigned int		trim_timeout;		/* In milliseconds */
> -	bool			enhanced_area_en;	/* enable bit */
> +	bool			partition_setting_completed;	/* enable bit */
>  	unsigned long long	enhanced_area_offset;	/* Units: Byte */
>  	unsigned int		enhanced_area_size;	/* Units: KB */
>  	unsigned int		cache_size;		/* Units: KB */
> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
> index 64ec963..78753bc 100644
> --- a/include/linux/mmc/mmc.h
> +++ b/include/linux/mmc/mmc.h
> @@ -281,6 +281,7 @@ struct _mmc_csd {
>  #define EXT_CSD_EXP_EVENTS_CTRL		56	/* R/W, 2 bytes */
>  #define EXT_CSD_DATA_SECTOR_SIZE	61	/* R */
>  #define EXT_CSD_GP_SIZE_MULT		143	/* R/W */
> +#define EXT_CSD_PARTITION_SETTING_COMPLETED 155	/* R/W */
>  #define EXT_CSD_PARTITION_ATTRIBUTE	156	/* R/W */
>  #define EXT_CSD_PARTITION_SUPPORT	160	/* RO */
>  #define EXT_CSD_HPI_MGMT		161	/* R/W */
> @@ -349,6 +350,7 @@ struct _mmc_csd {
>  #define EXT_CSD_PART_CONFIG_ACC_RPMB	(0x3)
>  #define EXT_CSD_PART_CONFIG_ACC_GP0	(0x4)
> 
> +#define EXT_CSD_PART_SETTING_COMPLETED	(0x1)
>  #define EXT_CSD_PART_SUPPORT_PART_EN	(0x1)
> 
>  #define EXT_CSD_CMD_SET_NORMAL		(1<<0)
> 

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