From 283028122db37621b124f079ca8eae5b64807ad4 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 5 Apr 2012 14:45:48 +0300 Subject: [PATCH] mmc: fixes for eMMC v4.5 sanitize operation eMMC v4.5 sanitize operation erases all copies of unmapped data. However trim or erase operations must be used first to unmap the required sectors. That was not being done. Fixes apply to linux 3.2 on. Signed-off-by: Adrian Hunter Cc: Acked-by: Jaehoon Chung Acked-by: Linus Walleij Signed-off-by: Chris Ball --- drivers/mmc/card/block.c | 54 ++++++++++++++++++++++++++++------------ drivers/mmc/core/core.c | 2 ++ 2 files changed, 40 insertions(+), 16 deletions(-) diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index b1809650b7aa..4232bc4d9926 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -873,7 +873,7 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, { struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; - unsigned int from, nr, arg; + unsigned int from, nr, arg, trim_arg, erase_arg; int err = 0, type = MMC_BLK_SECDISCARD; if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) { @@ -881,20 +881,26 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, goto out; } + from = blk_rq_pos(req); + nr = blk_rq_sectors(req); + /* The sanitize operation is supported at v4.5 only */ if (mmc_can_sanitize(card)) { - err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_SANITIZE_START, 1, 0); - goto out; + erase_arg = MMC_ERASE_ARG; + trim_arg = MMC_TRIM_ARG; + } else { + erase_arg = MMC_SECURE_ERASE_ARG; + trim_arg = MMC_SECURE_TRIM1_ARG; } - from = blk_rq_pos(req); - nr = blk_rq_sectors(req); - - if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) - arg = MMC_SECURE_TRIM1_ARG; - else - arg = MMC_SECURE_ERASE_ARG; + if (mmc_erase_group_aligned(card, from, nr)) + arg = erase_arg; + else if (mmc_can_trim(card)) + arg = trim_arg; + else { + err = -EINVAL; + goto out; + } retry: if (card->quirks & MMC_QUIRK_INAND_CMD38) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, @@ -904,25 +910,41 @@ retry: INAND_CMD38_ARG_SECERASE, 0); if (err) - goto out; + goto out_retry; } + err = mmc_erase(card, from, nr, arg); - if (!err && arg == MMC_SECURE_TRIM1_ARG) { + if (err == -EIO) + goto out_retry; + if (err) + goto out; + + if (arg == MMC_SECURE_TRIM1_ARG) { if (card->quirks & MMC_QUIRK_INAND_CMD38) { err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, INAND_CMD38_ARG_EXT_CSD, INAND_CMD38_ARG_SECTRIM2, 0); if (err) - goto out; + goto out_retry; } + err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); + if (err == -EIO) + goto out_retry; + if (err) + goto out; } -out: - if (err == -EIO && !mmc_blk_reset(md, card->host, type)) + + if (mmc_can_sanitize(card)) + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_SANITIZE_START, 1, 0); +out_retry: + if (err && !mmc_blk_reset(md, card->host, type)) goto retry; if (!err) mmc_blk_reset_success(md, type); +out: spin_lock_irq(&md->lock); __blk_end_request(req, err, blk_rq_bytes(req)); spin_unlock_irq(&md->lock); diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 83db5ef96bb0..e541efbf3256 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1702,6 +1702,8 @@ EXPORT_SYMBOL(mmc_can_discard); int mmc_can_sanitize(struct mmc_card *card) { + if (!mmc_can_trim(card) && !mmc_can_erase(card)) + return 0; if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE) return 1; return 0; -- 2.20.1