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authorKyungmin Park <kyungmin.park@samsung.com>2011-10-14 14:15:48 +0900
committerChris Ball <cjb@laptop.org>2011-10-26 16:32:26 -0400
commitd9ddd62943ee07a75d0428ffcf52f1a747a28c39 (patch)
treee4fb8b0b2ba2fe39bf725762b2c04441f1adf3b8
parent4e0a5adf46ee7810af2e1b7e4e8c2a298652618e (diff)
mmc: core: mmc sanitize feature support for v4.5
In the v4.5, there's no secure erase & trim support. Instead it supports the sanitize feature. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
-rw-r--r--drivers/mmc/card/block.c9
-rw-r--r--drivers/mmc/card/queue.c2
-rw-r--r--drivers/mmc/core/core.c8
-rw-r--r--include/linux/mmc/core.h1
-rw-r--r--include/linux/mmc/mmc.h2
5 files changed, 20 insertions, 2 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 049445eb4f74..e85816e1634a 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -792,11 +792,18 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
unsigned int from, nr, arg;
int err = 0, type = MMC_BLK_SECDISCARD;
- if (!mmc_can_secure_erase_trim(card)) {
+ if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
err = -EOPNOTSUPP;
goto out;
}
+ /* 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;
+ }
+
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index fed290ecc242..dcad59cbfef1 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -140,7 +140,7 @@ static void mmc_queue_setup_discard(struct request_queue *q,
/* granularity must not be greater than max. discard */
if (card->pref_erase > max_discard)
q->limits.discard_granularity = 0;
- if (mmc_can_secure_erase_trim(card))
+ if (mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))
queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
}
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index a3c4e0fe9434..d9836e5a4e59 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1713,6 +1713,14 @@ int mmc_can_trim(struct mmc_card *card)
}
EXPORT_SYMBOL(mmc_can_trim);
+int mmc_can_sanitize(struct mmc_card *card)
+{
+ if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
+ return 1;
+ return 0;
+}
+EXPORT_SYMBOL(mmc_can_sanitize);
+
int mmc_can_secure_erase_trim(struct mmc_card *card)
{
if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 56e5625b6f41..9585835cbc42 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -156,6 +156,7 @@ extern int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
unsigned int arg);
extern int mmc_can_erase(struct mmc_card *card);
extern int mmc_can_trim(struct mmc_card *card);
+extern int mmc_can_sanitize(struct mmc_card *card);
extern int mmc_can_secure_erase_trim(struct mmc_card *card);
extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
unsigned int nr);
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 02e9e3de9609..8a05a21fc7c3 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -275,6 +275,7 @@ struct _mmc_csd {
#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
+#define EXT_CSD_SANITIZE_START 165 /* W */
#define EXT_CSD_WR_REL_PARAM 166 /* RO */
#define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */
#define EXT_CSD_PART_CONFIG 179 /* R/W */
@@ -343,6 +344,7 @@ struct _mmc_csd {
#define EXT_CSD_SEC_ER_EN BIT(0)
#define EXT_CSD_SEC_BD_BLK_EN BIT(2)
#define EXT_CSD_SEC_GB_CL_EN BIT(4)
+#define EXT_CSD_SEC_SANITIZE BIT(6) /* v4.5 only */
#define EXT_CSD_RST_N_EN_MASK 0x3
#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */