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mmc: core: Optimize time for secure erase/trim for some Kingston eMMCs

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Kingston eMMC IY2964 and IB2932 takes a fixed ~2 seconds for each secure
erase/trim operation regardless of size - that is, a single secure
erase/trim operation of 1MB takes the same time as 1GB. With default
calculated 3.5MB max discard size, secure erase 1GB requires ~300 separate
operations taking ~10 minutes total.

Add a card quirk, MMC_QUIRK_FIXED_SECURE_ERASE_TRIM_TIME, to set maximum
secure erase size for those devices. This allows 1GB secure erase to
complete in a single operation, reducing time from 10 minutes to just 2
seconds.

Signed-off-by: Luke Wang <ziniu.wang_1@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Luke Wang
2026-02-04 11:40:03 +08:00
committed by Ulf Hansson
parent f3b9683bf5
commit d6bf2e64de
4 changed files with 22 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/mmc/core/card.h
View File

@@ -311,4 +311,9 @@ static inline int mmc_card_broken_mdt(const struct mmc_card *c)
return c->quirks & MMC_QUIRK_BROKEN_MDT;
}
static inline int mmc_card_fixed_secure_erase_trim_time(const struct mmc_card *c)
{
return c->quirks & MMC_QUIRK_FIXED_SECURE_ERASE_TRIM_TIME;
}
#endif

9
drivers/mmc/core/queue.c
View File

@@ -184,8 +184,13 @@ static void mmc_queue_setup_discard(struct mmc_card *card,
return;
lim->max_hw_discard_sectors = max_discard;
if (mmc_card_can_secure_erase_trim(card))
lim->max_secure_erase_sectors = max_discard;
if (mmc_card_can_secure_erase_trim(card)) {
if (mmc_card_fixed_secure_erase_trim_time(card))
lim->max_secure_erase_sectors = UINT_MAX >> card->erase_shift;
else
lim->max_secure_erase_sectors = max_discard;
}
if (mmc_card_can_trim(card) && card->erased_byte == 0)
lim->max_write_zeroes_sectors = max_discard;

9
drivers/mmc/core/quirks.h
View File

@@ -153,6 +153,15 @@ static const struct mmc_fixup __maybe_unused mmc_blk_fixups[] = {
MMC_FIXUP("M62704", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,
MMC_QUIRK_TRIM_BROKEN),
/*
* On Some Kingston eMMCs, secure erase/trim time is independent
* of erase size, fixed at approximately 2 seconds.
*/
MMC_FIXUP("IY2964", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,
MMC_QUIRK_FIXED_SECURE_ERASE_TRIM_TIME),
MMC_FIXUP("IB2932", CID_MANFID_KINGSTON, 0x0100, add_quirk_mmc,
MMC_QUIRK_FIXED_SECURE_ERASE_TRIM_TIME),
END_FIXUP
};

1
include/linux/mmc/card.h
View File

@@ -330,6 +330,7 @@ struct mmc_card {
#define MMC_QUIRK_BROKEN_SD_POWEROFF_NOTIFY (1<<17) /* Disable broken SD poweroff notify support */
#define MMC_QUIRK_NO_UHS_DDR50_TUNING (1<<18) /* Disable DDR50 tuning */
#define MMC_QUIRK_BROKEN_MDT (1<<19) /* Wrong manufacturing year */
#define MMC_QUIRK_FIXED_SECURE_ERASE_TRIM_TIME (1<<20) /* Secure erase/trim time is fixed regardless of size */
bool written_flag; /* Indicates eMMC has been written since power on */
bool reenable_cmdq; /* Re-enable Command Queue */