The patch titled
mmc_block: add support for secure discard
has been added to the -mm tree. Its filename is
mmc_block-add-support-for-secure-discard.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mmc_block: add support for secure discard
From: Adrian Hunter <[email protected]>
Secure discard is implemented by Secure Trim if the discard is unaligned
or Secure Erase otherwise.
Signed-off-by: Adrian Hunter <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Kyungmin Park <[email protected]>
Cc: Madhusudhan Chikkature <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Ben Gardiner <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/mmc/card/block.c | 46 ++++++++++++++++++++++++++++++++++---
drivers/mmc/card/queue.c | 3 ++
2 files changed, 46 insertions(+), 3 deletions(-)
diff -puN drivers/mmc/card/block.c~mmc_block-add-support-for-secure-discard
drivers/mmc/card/block.c
--- a/drivers/mmc/card/block.c~mmc_block-add-support-for-secure-discard
+++ a/drivers/mmc/card/block.c
@@ -280,6 +280,42 @@ out:
return err ? 0 : 1;
}
+static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
+ struct request *req)
+{
+ struct mmc_blk_data *md = mq->data;
+ struct mmc_card *card = md->queue.card;
+ unsigned int from, nr, arg;
+ int err = 0;
+
+ mmc_claim_host(card->host);
+
+ if (!mmc_can_secure_erase_trim(card)) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ 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;
+
+ err = mmc_erase(card, from, nr, arg);
+ if (!err && arg == MMC_SECURE_TRIM1_ARG)
+ err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
+out:
+ spin_lock_irq(&md->lock);
+ __blk_end_request(req, err, blk_rq_bytes(req));
+ spin_unlock_irq(&md->lock);
+
+ mmc_release_host(card->host);
+
+ return err ? 0 : 1;
+}
+
static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->data;
@@ -510,10 +546,14 @@ static int mmc_blk_issue_rw_rq(struct mm
static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
{
- if (req->cmd_flags & REQ_DISCARD)
- return mmc_blk_issue_discard_rq(mq, req);
- else
+ if (req->cmd_flags & REQ_DISCARD) {
+ if (req->cmd_flags & REQ_SECURE)
+ return mmc_blk_issue_secdiscard_rq(mq, req);
+ else
+ return mmc_blk_issue_discard_rq(mq, req);
+ } else {
return mmc_blk_issue_rw_rq(mq, req);
+ }
}
static inline int mmc_blk_readonly(struct mmc_card *card)
diff -puN drivers/mmc/card/queue.c~mmc_block-add-support-for-secure-discard
drivers/mmc/card/queue.c
--- a/drivers/mmc/card/queue.c~mmc_block-add-support-for-secure-discard
+++ a/drivers/mmc/card/queue.c
@@ -141,6 +141,9 @@ int mmc_init_queue(struct mmc_queue *mq,
mq->queue->limits.discard_alignment =
card->erase_size << 9;
}
+ if (mmc_can_secure_erase_trim(card))
+ queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD,
+ mq->queue);
}
#ifdef CONFIG_MMC_BLOCK_BOUNCE
_
Patches currently in -mm which might be from [email protected] are
linux-next.patch
mmc-recognize-csd-structure.patch
mmc-recognize-csd-structure-fix.patch
mmc-split-mmc_sd_init_card.patch
mmc-implement-sd-combo-iomem-support.patch
mmc-omap-fix-for-bus-width-which-improves-sd-cards-peformance.patch
sdio-allow-non-standard-sdio-cards.patch
omap_hsmmc-add-init_card-pass-through-callback.patch
omap-pandora-pass-wl1251-information-to-sdio-core.patch
mmc-add-erase-secure-erase-trim-and-secure-trim-operations.patch
mmc_block-add-discard-support.patch
omap_hsmmc-add-erase-capability.patch
block-add-secure-discard.patch
mmc_block-add-support-for-secure-discard.patch
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
