From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9CBC63EDE4B; Tue, 12 May 2026 18:02:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778608930; cv=none; b=dwortd5tDheEhY/bI/kSrXaym07HELEetJ64R8K/XFE8EhubBT4r5l8xuSFtptsyYXAMlt5ILFpM6QRlB1PhOIB/aRtafb015b7W51m1ho39latAgG9Bj4AiWFYZYf2JboT3D2SaTy0DN0pDH+d2SC413wVKfMrbyqjTY766lsk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778608930; c=relaxed/simple; bh=TfXr6MzuPn/lTxrG1h6r3S2nGWHyR54NVO0ulcFTHnI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=g7O0gv5cMnWUhFDo2ZCH6mas80PJAA6eLrxg88g0vH8cZs5yW0ggHoQJVaUNXPBoHj04kOLdpkjOJUgmlfg5lS0SZmyajygsl3EyS5BJ0HHKx9dIFv0TZqZixL3EnPJNz7YlagFHMtlMcyhUIKuFWtRcO4LTcu4nOU0fmpt8OvY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zEXCOZCY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="zEXCOZCY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2DC3BC2BCB0; Tue, 12 May 2026 18:02:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778608930; bh=TfXr6MzuPn/lTxrG1h6r3S2nGWHyR54NVO0ulcFTHnI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zEXCOZCYYb8EnCs0Ay/Widqm/zXO7FMYrWkH5BVoogY7JtaYOVp+8DSHWVJMp1Yzy ITgS/7yVVYDVbMSFDpHFeASAkB3k6Mj+cPEImg9nFvukLarZvCxcJROlzUme8K7Ss/ jthVI/n/8GvQEB9kpPf5UtONh05k1b1CdAc6VAaE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luke Wang , Ulf Hansson , Sasha Levin Subject: [PATCH 6.18 256/270] mmc: core: Optimize time for secure erase/trim for some Kingston eMMCs Date: Tue, 12 May 2026 19:40:57 +0200 Message-ID: <20260512173943.835304621@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260512173938.452574370@linuxfoundation.org> References: <20260512173938.452574370@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luke Wang [ Upstream commit d6bf2e64dec87322f2b11565ddb59c0e967f96e3 ] 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 Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/core/card.h | 5 +++++ drivers/mmc/core/queue.c | 9 +++++++-- drivers/mmc/core/quirks.h | 9 +++++++++ include/linux/mmc/card.h | 1 + 4 files changed, 22 insertions(+), 2 deletions(-) --- a/drivers/mmc/core/card.h +++ b/drivers/mmc/core/card.h @@ -311,4 +311,9 @@ static inline int mmc_card_broken_mdt(co 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 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -184,8 +184,13 @@ static void mmc_queue_setup_discard(stru 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; --- a/drivers/mmc/core/quirks.h +++ b/drivers/mmc/core/quirks.h @@ -153,6 +153,15 @@ static const struct mmc_fixup __maybe_un 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 }; --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -331,6 +331,7 @@ 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 */