| Message ID | d68d8c8edda35a050a6e92b0ff1d57dd3e7c61d6.1646820083.git.marc.mattmueller@netmodule.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: update life time and rel write on sysfs read | expand |
> The mmc reliable write setting (from ext_csd) was not available on the sysfs. > Thus, added rel_param and rel_write_set to sysfs and added the update of > rel_write_set on sysfs read. Here also - why adding ABI when its already available via mmc-utils? Thanks, Avri > > Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com> > --- > drivers/mmc/core/mmc.c | 29 +++++++++++++++++++++++++++++ > include/linux/mmc/card.h | 1 + > include/linux/mmc/mmc.h | 1 + > 3 files changed, 31 insertions(+) > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index > d9537c894e33..a64d1ecb0de9 100644 > --- a/drivers/mmc/core/mmc.c > +++ b/drivers/mmc/core/mmc.c > @@ -364,6 +364,10 @@ static int > mmc_update_ext_csd_runtime_params(struct mmc_card *card, u8 > *ext_csd) { > int err = 0; > > + /* eMMC v4.41 or later */ > + if (card->ext_csd.rev >= 5) > + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; > + > /* eMMC v5 or later */ > if (card->ext_csd.rev >= 7) { > card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; > @@ -587,6 +591,7 @@ static int mmc_decode_ext_csd(struct mmc_card > *card, u8 *ext_csd) > } > > card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; > + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; > card->ext_csd.rst_n_function = > ext_csd[EXT_CSD_RST_N_FUNCTION]; > > /* > @@ -820,6 +825,7 @@ MMC_DEV_ATTR(name, "%s\n", card- > >cid.prod_name); MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); > MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); MMC_DEV_ATTR(rev, > "0x%x\n", card->ext_csd.rev); > +MMC_DEV_ATTR(rel_param, "0x%02x\n", card->ext_csd.rel_param); > MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); > MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", > card->ext_csd.enhanced_area_offset); > @@ -886,6 +892,27 @@ static ssize_t pre_eol_info_show(struct device > *dev, > > static DEVICE_ATTR_RO(pre_eol_info); > > +static ssize_t rel_write_set_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) { > + int err = 0; > + struct mmc_card *card = mmc_dev_to_card(dev); > + > + /* before eMMC v4.41 */ > + if (card->ext_csd.rev < 5) > + return sprintf(buf, "%s\n", "-"); > + > + /* eMMC v4.41 or later */ > + err = mmc_update_csd(card); > + if (err) > + return (ssize_t)err; > + > + return sprintf(buf, "0x%02x\n", card->ext_csd.rel_wr_set); } > + > +static DEVICE_ATTR_RO(rel_write_set); > + > static ssize_t mmc_fwrev_show(struct device *dev, > struct device_attribute *attr, > char *buf) @@ -931,6 +958,8 @@ static struct attribute > *mmc_std_attrs[] = { > &dev_attr_oemid.attr, > &dev_attr_prv.attr, > &dev_attr_rev.attr, > + &dev_attr_rel_param.attr, > + &dev_attr_rel_write_set.attr, > &dev_attr_pre_eol_info.attr, > &dev_attr_life_time.attr, > &dev_attr_serial.attr, > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index > 37f975875102..21c47893fcb4 100644 > --- a/include/linux/mmc/card.h > +++ b/include/linux/mmc/card.h > @@ -48,6 +48,7 @@ struct mmc_ext_csd { > u8 sec_feature_support; > u8 rel_sectors; > u8 rel_param; > + u8 rel_wr_set; > bool enhanced_rpmb_supported; > u8 part_config; > u8 cache_ctrl; > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index > d9a65c6a8816..42afd442a70a 100644 > --- a/include/linux/mmc/mmc.h > +++ b/include/linux/mmc/mmc.h > @@ -266,6 +266,7 @@ static inline bool mmc_ready_for_data(u32 status) > #define EXT_CSD_BKOPS_START 164 /* W */ > #define EXT_CSD_SANITIZE_START 165 /* W */ > #define EXT_CSD_WR_REL_PARAM 166 /* RO */ > +#define EXT_CSD_WR_REL_SET 167 /* R/W */ > #define EXT_CSD_RPMB_MULT 168 /* RO */ > #define EXT_CSD_FW_CONFIG 169 /* R/W */ > #define EXT_CSD_BOOT_WP 173 /* R/W */ > -- > 2.20.1
On Thu, 10 Mar 2022 at 15:08, Avri Altman <Avri.Altman@wdc.com> wrote: > > > > The mmc reliable write setting (from ext_csd) was not available on the sysfs. > > Thus, added rel_param and rel_write_set to sysfs and added the update of > > rel_write_set on sysfs read. > Here also - why adding ABI when its already available via mmc-utils? > > Thanks, > Avri FYI, I agree with Avri here. Please use mmc-utils. In case the values in sysfs become confusing as they may be outdated at some point, perhaps we should consider dropping them? Kind regards Uffe > > > > > Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com> > > --- > > drivers/mmc/core/mmc.c | 29 +++++++++++++++++++++++++++++ > > include/linux/mmc/card.h | 1 + > > include/linux/mmc/mmc.h | 1 + > > 3 files changed, 31 insertions(+) > > > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index > > d9537c894e33..a64d1ecb0de9 100644 > > --- a/drivers/mmc/core/mmc.c > > +++ b/drivers/mmc/core/mmc.c > > @@ -364,6 +364,10 @@ static int > > mmc_update_ext_csd_runtime_params(struct mmc_card *card, u8 > > *ext_csd) { > > int err = 0; > > > > + /* eMMC v4.41 or later */ > > + if (card->ext_csd.rev >= 5) > > + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; > > + > > /* eMMC v5 or later */ > > if (card->ext_csd.rev >= 7) { > > card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; > > @@ -587,6 +591,7 @@ static int mmc_decode_ext_csd(struct mmc_card > > *card, u8 *ext_csd) > > } > > > > card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; > > + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; > > card->ext_csd.rst_n_function = > > ext_csd[EXT_CSD_RST_N_FUNCTION]; > > > > /* > > @@ -820,6 +825,7 @@ MMC_DEV_ATTR(name, "%s\n", card- > > >cid.prod_name); MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); > > MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); MMC_DEV_ATTR(rev, > > "0x%x\n", card->ext_csd.rev); > > +MMC_DEV_ATTR(rel_param, "0x%02x\n", card->ext_csd.rel_param); > > MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); > > MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", > > card->ext_csd.enhanced_area_offset); > > @@ -886,6 +892,27 @@ static ssize_t pre_eol_info_show(struct device > > *dev, > > > > static DEVICE_ATTR_RO(pre_eol_info); > > > > +static ssize_t rel_write_set_show(struct device *dev, > > + struct device_attribute *attr, > > + char *buf) { > > + int err = 0; > > + struct mmc_card *card = mmc_dev_to_card(dev); > > + > > + /* before eMMC v4.41 */ > > + if (card->ext_csd.rev < 5) > > + return sprintf(buf, "%s\n", "-"); > > + > > + /* eMMC v4.41 or later */ > > + err = mmc_update_csd(card); > > + if (err) > > + return (ssize_t)err; > > + > > + return sprintf(buf, "0x%02x\n", card->ext_csd.rel_wr_set); } > > + > > +static DEVICE_ATTR_RO(rel_write_set); > > + > > static ssize_t mmc_fwrev_show(struct device *dev, > > struct device_attribute *attr, > > char *buf) @@ -931,6 +958,8 @@ static struct attribute > > *mmc_std_attrs[] = { > > &dev_attr_oemid.attr, > > &dev_attr_prv.attr, > > &dev_attr_rev.attr, > > + &dev_attr_rel_param.attr, > > + &dev_attr_rel_write_set.attr, > > &dev_attr_pre_eol_info.attr, > > &dev_attr_life_time.attr, > > &dev_attr_serial.attr, > > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index > > 37f975875102..21c47893fcb4 100644 > > --- a/include/linux/mmc/card.h > > +++ b/include/linux/mmc/card.h > > @@ -48,6 +48,7 @@ struct mmc_ext_csd { > > u8 sec_feature_support; > > u8 rel_sectors; > > u8 rel_param; > > + u8 rel_wr_set; > > bool enhanced_rpmb_supported; > > u8 part_config; > > u8 cache_ctrl; > > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index > > d9a65c6a8816..42afd442a70a 100644 > > --- a/include/linux/mmc/mmc.h > > +++ b/include/linux/mmc/mmc.h > > @@ -266,6 +266,7 @@ static inline bool mmc_ready_for_data(u32 status) > > #define EXT_CSD_BKOPS_START 164 /* W */ > > #define EXT_CSD_SANITIZE_START 165 /* W */ > > #define EXT_CSD_WR_REL_PARAM 166 /* RO */ > > +#define EXT_CSD_WR_REL_SET 167 /* R/W */ > > #define EXT_CSD_RPMB_MULT 168 /* RO */ > > #define EXT_CSD_FW_CONFIG 169 /* R/W */ > > #define EXT_CSD_BOOT_WP 173 /* R/W */ > > -- > > 2.20.1 >
On Tue, 2022-03-15 at 10:39 +0100, Ulf Hansson wrote: > On Thu, 10 Mar 2022 at 15:08, Avri Altman <Avri.Altman@wdc.com> > wrote: > > > > > The mmc reliable write setting (from ext_csd) was not available > > > on the sysfs. > > > Thus, added rel_param and rel_write_set to sysfs and added the > > > update of > > > rel_write_set on sysfs read. > > Here also - why adding ABI when its already available via mmc- > > utils? > > > > Thanks, > > Avri > > FYI, I agree with Avri here. Please use mmc-utils. > > In case the values in sysfs become confusing as they may be outdated > at some point, perhaps we should consider dropping them? > > Kind regards > Uffe Hi, yes I was confused about having the lifetime values available in the sysfs but without having an update over time. The reliable write values were some kind of logic for me to add them as well. That's why I was hesitating first to create a single patch for all these values but as it concerns two different topics I decided to create a patchset. Nevertheless, if you propose to use the mmc-utils for the dynamic values, it is less confusing if you just keep only the static values and drop the dynamic ones. Kind regards Marc > > > > Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com> > > > --- > > > drivers/mmc/core/mmc.c | 29 +++++++++++++++++++++++++++++ > > > include/linux/mmc/card.h | 1 + > > > include/linux/mmc/mmc.h | 1 + > > > 3 files changed, 31 insertions(+) > > > > > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c > > > index > > > d9537c894e33..a64d1ecb0de9 100644 > > > --- a/drivers/mmc/core/mmc.c > > > +++ b/drivers/mmc/core/mmc.c > > > @@ -364,6 +364,10 @@ static int > > > mmc_update_ext_csd_runtime_params(struct mmc_card *card, u8 > > > *ext_csd) { > > > int err = 0; > > > > > > + /* eMMC v4.41 or later */ > > > + if (card->ext_csd.rev >= 5) > > > + card->ext_csd.rel_wr_set = > > > ext_csd[EXT_CSD_WR_REL_SET]; > > > + > > > /* eMMC v5 or later */ > > > if (card->ext_csd.rev >= 7) { > > > card->ext_csd.pre_eol_info = > > > ext_csd[EXT_CSD_PRE_EOL_INFO]; > > > @@ -587,6 +591,7 @@ static int mmc_decode_ext_csd(struct mmc_card > > > *card, u8 *ext_csd) > > > } > > > > > > card->ext_csd.rel_param = > > > ext_csd[EXT_CSD_WR_REL_PARAM]; > > > + card->ext_csd.rel_wr_set = > > > ext_csd[EXT_CSD_WR_REL_SET]; > > > card->ext_csd.rst_n_function = > > > ext_csd[EXT_CSD_RST_N_FUNCTION]; > > > > > > /* > > > @@ -820,6 +825,7 @@ MMC_DEV_ATTR(name, "%s\n", card- > > > > cid.prod_name); MMC_DEV_ATTR(oemid, "0x%04x\n", card- > > > > >cid.oemid); > > > MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); MMC_DEV_ATTR(rev, > > > "0x%x\n", card->ext_csd.rev); > > > +MMC_DEV_ATTR(rel_param, "0x%02x\n", card->ext_csd.rel_param); > > > MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); > > > MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", > > > card->ext_csd.enhanced_area_offset); > > > @@ -886,6 +892,27 @@ static ssize_t pre_eol_info_show(struct > > > device > > > *dev, > > > > > > static DEVICE_ATTR_RO(pre_eol_info); > > > > > > +static ssize_t rel_write_set_show(struct device *dev, > > > + struct device_attribute *attr, > > > + char *buf) { > > > + int err = 0; > > > + struct mmc_card *card = mmc_dev_to_card(dev); > > > + > > > + /* before eMMC v4.41 */ > > > + if (card->ext_csd.rev < 5) > > > + return sprintf(buf, "%s\n", "-"); > > > + > > > + /* eMMC v4.41 or later */ > > > + err = mmc_update_csd(card); > > > + if (err) > > > + return (ssize_t)err; > > > + > > > + return sprintf(buf, "0x%02x\n", card- > > > >ext_csd.rel_wr_set); } > > > + > > > +static DEVICE_ATTR_RO(rel_write_set); > > > + > > > static ssize_t mmc_fwrev_show(struct device *dev, > > > struct device_attribute *attr, > > > char *buf) @@ -931,6 +958,8 @@ > > > static struct attribute > > > *mmc_std_attrs[] = { > > > &dev_attr_oemid.attr, > > > &dev_attr_prv.attr, > > > &dev_attr_rev.attr, > > > + &dev_attr_rel_param.attr, > > > + &dev_attr_rel_write_set.attr, > > > &dev_attr_pre_eol_info.attr, > > > &dev_attr_life_time.attr, > > > &dev_attr_serial.attr, > > > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h > > > index > > > 37f975875102..21c47893fcb4 100644 > > > --- a/include/linux/mmc/card.h > > > +++ b/include/linux/mmc/card.h > > > @@ -48,6 +48,7 @@ struct mmc_ext_csd { > > > u8 sec_feature_support; > > > u8 rel_sectors; > > > u8 rel_param; > > > + u8 rel_wr_set; > > > bool enhanced_rpmb_supported; > > > u8 part_config; > > > u8 cache_ctrl; > > > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h > > > index > > > d9a65c6a8816..42afd442a70a 100644 > > > --- a/include/linux/mmc/mmc.h > > > +++ b/include/linux/mmc/mmc.h > > > @@ -266,6 +266,7 @@ static inline bool mmc_ready_for_data(u32 > > > status) > > > #define EXT_CSD_BKOPS_START 164 /* W */ > > > #define EXT_CSD_SANITIZE_START 165 /* W */ > > > #define EXT_CSD_WR_REL_PARAM 166 /* RO */ > > > +#define EXT_CSD_WR_REL_SET 167 /* R/W */ > > > #define EXT_CSD_RPMB_MULT 168 /* RO */ > > > #define EXT_CSD_FW_CONFIG 169 /* R/W */ > > > #define EXT_CSD_BOOT_WP 173 /* R/W */ > > > -- > > > 2.20.1
On Tue, 15 Mar 2022 at 13:40, Marc Mattmüller <Marc.Mattmueller@netmodule.com> wrote: > > On Tue, 2022-03-15 at 10:39 +0100, Ulf Hansson wrote: > > On Thu, 10 Mar 2022 at 15:08, Avri Altman <Avri.Altman@wdc.com> > > wrote: > > > > > > > The mmc reliable write setting (from ext_csd) was not available > > > > on the sysfs. > > > > Thus, added rel_param and rel_write_set to sysfs and added the > > > > update of > > > > rel_write_set on sysfs read. > > > Here also - why adding ABI when its already available via mmc- > > > utils? > > > > > > Thanks, > > > Avri > > > > FYI, I agree with Avri here. Please use mmc-utils. > > > > In case the values in sysfs become confusing as they may be outdated > > at some point, perhaps we should consider dropping them? > > > > Kind regards > > Uffe > > Hi, > yes I was confused about having the lifetime values available in the > sysfs but without having an update over time. The reliable write values > were some kind of logic for me to add them as well. That's why I was > hesitating first to create a single patch for all these values but as > it concerns two different topics I decided to create a patchset. > > Nevertheless, if you propose to use the mmc-utils for the dynamic > values, it is less confusing if you just keep only the static > values and drop the dynamic ones. Okay, that sounds reasonable - and thanks for clarifying. Kind regards Uffe > > Kind regards > Marc > > > > > > > Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com> > > > > --- > > > > drivers/mmc/core/mmc.c | 29 +++++++++++++++++++++++++++++ > > > > include/linux/mmc/card.h | 1 + > > > > include/linux/mmc/mmc.h | 1 + > > > > 3 files changed, 31 insertions(+) > > > > > > > > diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c > > > > index > > > > d9537c894e33..a64d1ecb0de9 100644 > > > > --- a/drivers/mmc/core/mmc.c > > > > +++ b/drivers/mmc/core/mmc.c > > > > @@ -364,6 +364,10 @@ static int > > > > mmc_update_ext_csd_runtime_params(struct mmc_card *card, u8 > > > > *ext_csd) { > > > > int err = 0; > > > > > > > > + /* eMMC v4.41 or later */ > > > > + if (card->ext_csd.rev >= 5) > > > > + card->ext_csd.rel_wr_set = > > > > ext_csd[EXT_CSD_WR_REL_SET]; > > > > + > > > > /* eMMC v5 or later */ > > > > if (card->ext_csd.rev >= 7) { > > > > card->ext_csd.pre_eol_info = > > > > ext_csd[EXT_CSD_PRE_EOL_INFO]; > > > > @@ -587,6 +591,7 @@ static int mmc_decode_ext_csd(struct mmc_card > > > > *card, u8 *ext_csd) > > > > } > > > > > > > > card->ext_csd.rel_param = > > > > ext_csd[EXT_CSD_WR_REL_PARAM]; > > > > + card->ext_csd.rel_wr_set = > > > > ext_csd[EXT_CSD_WR_REL_SET]; > > > > card->ext_csd.rst_n_function = > > > > ext_csd[EXT_CSD_RST_N_FUNCTION]; > > > > > > > > /* > > > > @@ -820,6 +825,7 @@ MMC_DEV_ATTR(name, "%s\n", card- > > > > > cid.prod_name); MMC_DEV_ATTR(oemid, "0x%04x\n", card- > > > > > >cid.oemid); > > > > MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); MMC_DEV_ATTR(rev, > > > > "0x%x\n", card->ext_csd.rev); > > > > +MMC_DEV_ATTR(rel_param, "0x%02x\n", card->ext_csd.rel_param); > > > > MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); > > > > MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", > > > > card->ext_csd.enhanced_area_offset); > > > > @@ -886,6 +892,27 @@ static ssize_t pre_eol_info_show(struct > > > > device > > > > *dev, > > > > > > > > static DEVICE_ATTR_RO(pre_eol_info); > > > > > > > > +static ssize_t rel_write_set_show(struct device *dev, > > > > + struct device_attribute *attr, > > > > + char *buf) { > > > > + int err = 0; > > > > + struct mmc_card *card = mmc_dev_to_card(dev); > > > > + > > > > + /* before eMMC v4.41 */ > > > > + if (card->ext_csd.rev < 5) > > > > + return sprintf(buf, "%s\n", "-"); > > > > + > > > > + /* eMMC v4.41 or later */ > > > > + err = mmc_update_csd(card); > > > > + if (err) > > > > + return (ssize_t)err; > > > > + > > > > + return sprintf(buf, "0x%02x\n", card- > > > > >ext_csd.rel_wr_set); } > > > > + > > > > +static DEVICE_ATTR_RO(rel_write_set); > > > > + > > > > static ssize_t mmc_fwrev_show(struct device *dev, > > > > struct device_attribute *attr, > > > > char *buf) @@ -931,6 +958,8 @@ > > > > static struct attribute > > > > *mmc_std_attrs[] = { > > > > &dev_attr_oemid.attr, > > > > &dev_attr_prv.attr, > > > > &dev_attr_rev.attr, > > > > + &dev_attr_rel_param.attr, > > > > + &dev_attr_rel_write_set.attr, > > > > &dev_attr_pre_eol_info.attr, > > > > &dev_attr_life_time.attr, > > > > &dev_attr_serial.attr, > > > > diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h > > > > index > > > > 37f975875102..21c47893fcb4 100644 > > > > --- a/include/linux/mmc/card.h > > > > +++ b/include/linux/mmc/card.h > > > > @@ -48,6 +48,7 @@ struct mmc_ext_csd { > > > > u8 sec_feature_support; > > > > u8 rel_sectors; > > > > u8 rel_param; > > > > + u8 rel_wr_set; > > > > bool enhanced_rpmb_supported; > > > > u8 part_config; > > > > u8 cache_ctrl; > > > > diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h > > > > index > > > > d9a65c6a8816..42afd442a70a 100644 > > > > --- a/include/linux/mmc/mmc.h > > > > +++ b/include/linux/mmc/mmc.h > > > > @@ -266,6 +266,7 @@ static inline bool mmc_ready_for_data(u32 > > > > status) > > > > #define EXT_CSD_BKOPS_START 164 /* W */ > > > > #define EXT_CSD_SANITIZE_START 165 /* W */ > > > > #define EXT_CSD_WR_REL_PARAM 166 /* RO */ > > > > +#define EXT_CSD_WR_REL_SET 167 /* R/W */ > > > > #define EXT_CSD_RPMB_MULT 168 /* RO */ > > > > #define EXT_CSD_FW_CONFIG 169 /* R/W */ > > > > #define EXT_CSD_BOOT_WP 173 /* R/W */ > > > > -- > > > > 2.20.1
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index d9537c894e33..a64d1ecb0de9 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -364,6 +364,10 @@ static int mmc_update_ext_csd_runtime_params(struct mmc_card *card, u8 *ext_csd) { int err = 0; + /* eMMC v4.41 or later */ + if (card->ext_csd.rev >= 5) + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; + /* eMMC v5 or later */ if (card->ext_csd.rev >= 7) { card->ext_csd.pre_eol_info = ext_csd[EXT_CSD_PRE_EOL_INFO]; @@ -587,6 +591,7 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) } card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; + card->ext_csd.rel_wr_set = ext_csd[EXT_CSD_WR_REL_SET]; card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; /* @@ -820,6 +825,7 @@ MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name); MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid); MMC_DEV_ATTR(prv, "0x%x\n", card->cid.prv); MMC_DEV_ATTR(rev, "0x%x\n", card->ext_csd.rev); +MMC_DEV_ATTR(rel_param, "0x%02x\n", card->ext_csd.rel_param); MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial); MMC_DEV_ATTR(enhanced_area_offset, "%llu\n", card->ext_csd.enhanced_area_offset); @@ -886,6 +892,27 @@ static ssize_t pre_eol_info_show(struct device *dev, static DEVICE_ATTR_RO(pre_eol_info); +static ssize_t rel_write_set_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + int err = 0; + struct mmc_card *card = mmc_dev_to_card(dev); + + /* before eMMC v4.41 */ + if (card->ext_csd.rev < 5) + return sprintf(buf, "%s\n", "-"); + + /* eMMC v4.41 or later */ + err = mmc_update_csd(card); + if (err) + return (ssize_t)err; + + return sprintf(buf, "0x%02x\n", card->ext_csd.rel_wr_set); +} + +static DEVICE_ATTR_RO(rel_write_set); + static ssize_t mmc_fwrev_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -931,6 +958,8 @@ static struct attribute *mmc_std_attrs[] = { &dev_attr_oemid.attr, &dev_attr_prv.attr, &dev_attr_rev.attr, + &dev_attr_rel_param.attr, + &dev_attr_rel_write_set.attr, &dev_attr_pre_eol_info.attr, &dev_attr_life_time.attr, &dev_attr_serial.attr, diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 37f975875102..21c47893fcb4 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -48,6 +48,7 @@ struct mmc_ext_csd { u8 sec_feature_support; u8 rel_sectors; u8 rel_param; + u8 rel_wr_set; bool enhanced_rpmb_supported; u8 part_config; u8 cache_ctrl; diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index d9a65c6a8816..42afd442a70a 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -266,6 +266,7 @@ static inline bool mmc_ready_for_data(u32 status) #define EXT_CSD_BKOPS_START 164 /* W */ #define EXT_CSD_SANITIZE_START 165 /* W */ #define EXT_CSD_WR_REL_PARAM 166 /* RO */ +#define EXT_CSD_WR_REL_SET 167 /* R/W */ #define EXT_CSD_RPMB_MULT 168 /* RO */ #define EXT_CSD_FW_CONFIG 169 /* R/W */ #define EXT_CSD_BOOT_WP 173 /* R/W */
The mmc reliable write setting (from ext_csd) was not available on the sysfs. Thus, added rel_param and rel_write_set to sysfs and added the update of rel_write_set on sysfs read. Signed-off-by: Marc Mattmueller <marc.mattmueller@netmodule.com> --- drivers/mmc/core/mmc.c | 29 +++++++++++++++++++++++++++++ include/linux/mmc/card.h | 1 + include/linux/mmc/mmc.h | 1 + 3 files changed, 31 insertions(+)