Following JEDEC standard, if the mmc support RPMB partition, a new interface is created and exposed via /dev/block. Users will be able to access RPMB partition using standard mmc IOCTL command.
Signed-off-by: Alex Macro <[email protected]> Signed-off-by: Loic Pallardy <[email protected]> Acked-by: Linus Walleij <[email protected]> Acked-by: Johan Rudholm <[email protected]> Reviewed-by: Namjae Jeon <[email protected]> --- drivers/mmc/core/mmc.c | 11 +++++++++++ include/linux/mmc/card.h | 2 ++ include/linux/mmc/mmc.h | 2 ++ 3 files changed, 15 insertions(+) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 258b203..8a459cb 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -480,6 +480,17 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM]; card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; + + /* + * RPMB regions are defined in multiples of 128K. + */ + card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; + if (ext_csd[EXT_CSD_RPMB_MULT]) { + mmc_part_add(card, ext_csd[EXT_CSD_RPMB_MULT] << 17, + EXT_CSD_PART_CONFIG_ACC_RPMB, + "rpmb", 0, false, + MMC_BLK_DATA_AREA_RPMB); + } } card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT]; diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index d76513b..46a5502 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -81,6 +81,7 @@ struct mmc_ext_csd { unsigned int boot_ro_lock; /* ro lock support */ bool boot_ro_lockable; u8 raw_partition_support; /* 160 */ + u8 raw_rpmb_size_mult; /* 168 */ u8 raw_erased_mem_count; /* 181 */ u8 raw_ext_csd_structure; /* 194 */ u8 raw_card_type; /* 196 */ @@ -200,6 +201,7 @@ struct mmc_part { #define MMC_BLK_DATA_AREA_MAIN (1<<0) #define MMC_BLK_DATA_AREA_BOOT (1<<1) #define MMC_BLK_DATA_AREA_GP (1<<2) +#define MMC_BLK_DATA_AREA_RPMB (1<<3) }; /* diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index d425cab..e73136a 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -282,6 +282,7 @@ struct _mmc_csd { #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ #define EXT_CSD_SANITIZE_START 165 /* W */ #define EXT_CSD_WR_REL_PARAM 166 /* RO */ +#define EXT_CSD_RPMB_MULT 168 /* RO */ #define EXT_CSD_BOOT_WP 173 /* R/W */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ #define EXT_CSD_PART_CONFIG 179 /* R/W */ @@ -333,6 +334,7 @@ struct _mmc_csd { #define EXT_CSD_PART_CONFIG_ACC_MASK (0x7) #define EXT_CSD_PART_CONFIG_ACC_BOOT0 (0x1) +#define EXT_CSD_PART_CONFIG_ACC_RPMB (0x3) #define EXT_CSD_PART_CONFIG_ACC_GP0 (0x4) #define EXT_CSD_PART_SUPPORT_PART_EN (0x1) -- 1.7.11.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
