Luke Wang 81472f8e87 mmc: core: Optimize time for secure erase/trim for some Kingston eMMCs ...

[ Upstream commit d6bf2e64de ]

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>
[ adapted to use mmc_can_secure_erase_trim()/mmc_can_trim() and placed helper after mmc_card_no_uhs_ddr50_tuning() ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-05-14 15:29:28 +02:00

..

card.h

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

2026-05-14 15:29:28 +02:00

core.h

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host.h

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mmc.h

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pm.h

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sd.h

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sdio_func.h

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sdio_ids.h

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sdio.h

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slot-gpio.h

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