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mmc: core: expose info about enhanced rpmb support

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Following eMMC JEDEC JESD84-B51 standard, an enhanced form of
rpmb is supported. What this enhanced mode supports is in addition
to be able to write one rpmb or two rpmb frames at a time,
32 frames can be written at a time.

Expose this information present in ext csd field so that the
user space application that wants to make use of this can do so.

Signed-off-by: Krishna Konda <kkonda@codeaurora.org>
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Link: https://lore.kernel.org/r/1588341189-4371-1-git-send-email-vbadigan@codeaurora.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Krishna Konda
2020-05-01 19:23:01 +05:30
committed by Ulf Hansson
parent 1dc5a61559
commit 064f7e58ee
3 changed files with 8 additions and 0 deletions
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1
include/linux/mmc/card.h
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@@ -48,6 +48,7 @@ struct mmc_ext_csd {
u8 sec_feature_support;
u8 rel_sectors;
u8 rel_param;
bool enhanced_rpmb_supported;
u8 part_config;
u8 cache_ctrl;
u8 rst_n_function;

1
include/linux/mmc/mmc.h
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@@ -325,6 +325,7 @@ static inline bool mmc_ready_for_data(u32 status)
*/
#define EXT_CSD_WR_REL_PARAM_EN (1<<2)
#define EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR (1<<4)
#define EXT_CSD_BOOT_WP_B_PWR_WP_DIS (0x40)
#define EXT_CSD_BOOT_WP_B_PERM_WP_DIS (0x10)