diff options
| author | Kyungmin Park <kyungmin.park@samsung.com> | 2011-10-18 09:34:04 +0900 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 16:32:27 -0400 |
| commit | b3bf915308ca2b50f3beec6cc824083870f0f4b5 (patch) | |
| tree | 955978242b333e1388358b4b50b5f8f4a5abca04 /include/linux/mmc | |
| parent | d9ddd62943ee07a75d0428ffcf52f1a747a28c39 (diff) | |
mmc: core: new discard feature support at eMMC v4.5
MMC v4.5 supports the DISCARD feature (CMD38). It's different from
trim and there's no check bit. Currently it's only supported at v4.5.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/card.h | 3 | ||||
| -rw-r--r-- | include/linux/mmc/core.h | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 711c3f8bfab..55137850878 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -80,6 +80,9 @@ struct mmc_ext_csd { u8 raw_sec_feature_support;/* 231 */ u8 raw_trim_mult; /* 232 */ u8 raw_sectors[4]; /* 212 - 4 bytes */ + + unsigned int feature_support; +#define MMC_DISCARD_FEATURE BIT(0) /* CMD38 feature */ }; struct sd_scr { diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 9585835cbc4..e918120235b 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -146,6 +146,7 @@ extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int); #define MMC_ERASE_ARG 0x00000000 #define MMC_SECURE_ERASE_ARG 0x80000000 #define MMC_TRIM_ARG 0x00000001 +#define MMC_DISCARD_ARG 0x00000003 #define MMC_SECURE_TRIM1_ARG 0x80000001 #define MMC_SECURE_TRIM2_ARG 0x80008000 @@ -156,6 +157,7 @@ extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr, unsigned int arg); extern int mmc_can_erase(struct mmc_card *card); extern int mmc_can_trim(struct mmc_card *card); +extern int mmc_can_discard(struct mmc_card *card); extern int mmc_can_sanitize(struct mmc_card *card); extern int mmc_can_secure_erase_trim(struct mmc_card *card); extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, |