The sanitize support is added as a user-app ioctl call, and
was removed from the block-device request, since its purpose is
to be invoked not via File-System but by a user.
This feature deletes the unmap memory region of the eMMC card,
by writing to a specific register in the EXT_CSD.
unmap region is the memory region that was previously deleted
(by erase, trim or discard operation).
In order to avoid timeout when sanitizing large-scale cards,
the timeout for sanitize operation is 240 seconds.
Signed-off-by: Yaniv Gardi <[email protected]>
Signed-off-by: Maya Erez <[email protected]>
---
drivers/mmc/card/block.c | 68 +++++++++++++++++++++++++++++++--------------
drivers/mmc/card/queue.c | 2 +-
drivers/mmc/core/core.c | 21 ++++++++++++++
include/linux/mmc/core.h | 2 +
include/linux/mmc/host.h | 1 +
5 files changed, 72 insertions(+), 22 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index e12a03c..1f043ee 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -58,6 +58,8 @@ MODULE_ALIAS("mmc:block");
#define INAND_CMD38_ARG_SECTRIM1 0x81
#define INAND_CMD38_ARG_SECTRIM2 0x88
#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
+#define MMC_SANITIZE_REQ_TIMEOUT 240000
+#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
(req->cmd_flags & REQ_META)) && \
@@ -409,6 +411,35 @@ static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
return err;
}
+static int ioctl_do_sanitize(struct mmc_card *card)
+{
+ int err;
+
+ if (!(mmc_can_sanitize(card) &&
+ (card->host->caps2 & MMC_CAP2_SANITIZE))) {
+ pr_warn("%s: %s - SANITIZE is not supported\n",
+ mmc_hostname(card->host), __func__);
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
+ mmc_hostname(card->host), __func__);
+
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_SANITIZE_START, 1,
+ MMC_SANITIZE_REQ_TIMEOUT);
+
+ if (err)
+ pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
+ mmc_hostname(card->host), __func__, err);
+
+ pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
+ __func__);
+out:
+ return err;
+}
+
static int mmc_blk_ioctl_cmd(struct block_device *bdev,
struct mmc_ioc_cmd __user *ic_ptr)
{
@@ -511,6 +542,16 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
goto cmd_rel_host;
}
+ if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) {
+ err = ioctl_do_sanitize(card);
+
+ if (err)
+ pr_err("%s: ioctl_do_sanitize() failed. err = %d",
+ __func__, err);
+
+ goto cmd_rel_host;
+ }
+
mmc_wait_for_req(card->host, &mrq);
if (cmd.error) {
@@ -940,10 +981,10 @@ 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, trim_arg, erase_arg;
+ unsigned int from, nr, arg;
int err = 0, type = MMC_BLK_SECDISCARD;
- if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
+ if (!(mmc_can_secure_erase_trim(card))) {
err = -EOPNOTSUPP;
goto out;
}
@@ -951,23 +992,11 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
from = blk_rq_pos(req);
nr = blk_rq_sectors(req);
- /* The sanitize operation is supported at v4.5 only */
- if (mmc_can_sanitize(card)) {
- erase_arg = MMC_ERASE_ARG;
- trim_arg = MMC_TRIM_ARG;
- } else {
- erase_arg = MMC_SECURE_ERASE_ARG;
- trim_arg = MMC_SECURE_TRIM1_ARG;
- }
+ 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,
@@ -1003,9 +1032,6 @@ retry:
goto out;
}
- 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;
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 9447a0e..fa9632e 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -173,7 +173,7 @@ 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) || mmc_can_sanitize(card))
+ if (mmc_can_secure_erase_trim(card))
queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
}
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 37c5dad..dea9381 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -402,6 +402,27 @@ static int mmc_wait_for_data_req_done(struct mmc_host *host,
context_info->is_done_rcv = false;
context_info->is_new_req = false;
cmd = mrq->cmd;
+
+ /*
+ * If host has timed out waiting for the sanitize
+ * to complete, card might be still in programming state
+ * so let's try to bring the card out of programming
+ * state.
+ */
+ if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
+ if (!mmc_interrupt_hpi(host->card)) {
+ pr_warning("%s: %s: Interrupted "
+ "sanitize\n",
+ mmc_hostname(host),
+ __func__);
+ cmd->error = 0;
+ break;
+ } else {
+ pr_err("%s: %s: Failed to interrupt "
+ "sanitize\n",
+ mmc_hostname(host), __func__);
+ }
+ }
if (!cmd->error || !cmd->retries ||
mmc_card_removed(host->card)) {
err = host->areq->err_check(host->card,
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 39613b9..bd06ff5 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -96,6 +96,8 @@ struct mmc_command {
*/
unsigned int cmd_timeout_ms; /* in milliseconds */
+ /* Set this flag only for blocking sanitize request */
+ bool sanitize_busy;
struct mmc_data *data; /* data segment associated with cmd */
struct mmc_request *mrq; /* associated request */
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index e326ae2..00c10be 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -281,6 +281,7 @@ struct mmc_host {
#define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
MMC_CAP2_PACKED_WR)
#define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */
+#define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */
mmc_pm_flag_t pm_caps; /* supported pm features */
--
1.7.3.3
--
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
On 17 April 2013 13:38, Maya Erez <[email protected]> wrote:
> The sanitize support is added as a user-app ioctl call, and
> was removed from the block-device request, since its purpose is
> to be invoked not via File-System but by a user.
> This feature deletes the unmap memory region of the eMMC card,
> by writing to a specific register in the EXT_CSD.
> unmap region is the memory region that was previously deleted
> (by erase, trim or discard operation).
> In order to avoid timeout when sanitizing large-scale cards,
> the timeout for sanitize operation is 240 seconds.
>
> Signed-off-by: Yaniv Gardi <[email protected]>
> Signed-off-by: Maya Erez <[email protected]>
> ---
> drivers/mmc/card/block.c | 68 +++++++++++++++++++++++++++++++--------------
> drivers/mmc/card/queue.c | 2 +-
> drivers/mmc/core/core.c | 21 ++++++++++++++
> include/linux/mmc/core.h | 2 +
> include/linux/mmc/host.h | 1 +
> 5 files changed, 72 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index e12a03c..1f043ee 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -58,6 +58,8 @@ MODULE_ALIAS("mmc:block");
> #define INAND_CMD38_ARG_SECTRIM1 0x81
> #define INAND_CMD38_ARG_SECTRIM2 0x88
> #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
> +#define MMC_SANITIZE_REQ_TIMEOUT 240000
> +#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
>
> #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
> (req->cmd_flags & REQ_META)) && \
> @@ -409,6 +411,35 @@ static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
> return err;
> }
>
> +static int ioctl_do_sanitize(struct mmc_card *card)
> +{
> + int err;
> +
> + if (!(mmc_can_sanitize(card) &&
> + (card->host->caps2 & MMC_CAP2_SANITIZE))) {
> + pr_warn("%s: %s - SANITIZE is not supported\n",
> + mmc_hostname(card->host), __func__);
> + err = -EOPNOTSUPP;
> + goto out;
> + }
> +
> + pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
> + mmc_hostname(card->host), __func__);
> +
> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
> + EXT_CSD_SANITIZE_START, 1,
> + MMC_SANITIZE_REQ_TIMEOUT);
> +
> + if (err)
> + pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
> + mmc_hostname(card->host), __func__, err);
> +
> + pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
> + __func__);
> +out:
> + return err;
> +}
> +
> static int mmc_blk_ioctl_cmd(struct block_device *bdev,
> struct mmc_ioc_cmd __user *ic_ptr)
> {
> @@ -511,6 +542,16 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
> goto cmd_rel_host;
> }
>
> + if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) {
> + err = ioctl_do_sanitize(card);
> +
> + if (err)
> + pr_err("%s: ioctl_do_sanitize() failed. err = %d",
> + __func__, err);
> +
> + goto cmd_rel_host;
> + }
> +
> mmc_wait_for_req(card->host, &mrq);
>
> if (cmd.error) {
> @@ -940,10 +981,10 @@ 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, trim_arg, erase_arg;
> + unsigned int from, nr, arg;
> int err = 0, type = MMC_BLK_SECDISCARD;
>
> - if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
> + if (!(mmc_can_secure_erase_trim(card))) {
> err = -EOPNOTSUPP;
> goto out;
> }
> @@ -951,23 +992,11 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
> from = blk_rq_pos(req);
> nr = blk_rq_sectors(req);
>
> - /* The sanitize operation is supported at v4.5 only */
> - if (mmc_can_sanitize(card)) {
> - erase_arg = MMC_ERASE_ARG;
> - trim_arg = MMC_TRIM_ARG;
> - } else {
> - erase_arg = MMC_SECURE_ERASE_ARG;
> - trim_arg = MMC_SECURE_TRIM1_ARG;
> - }
> + 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,
> @@ -1003,9 +1032,6 @@ retry:
> goto out;
> }
>
> - 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;
> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
> index 9447a0e..fa9632e 100644
> --- a/drivers/mmc/card/queue.c
> +++ b/drivers/mmc/card/queue.c
> @@ -173,7 +173,7 @@ 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) || mmc_can_sanitize(card))
> + if (mmc_can_secure_erase_trim(card))
> queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
> }
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 37c5dad..dea9381 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -402,6 +402,27 @@ static int mmc_wait_for_data_req_done(struct mmc_host *host,
> context_info->is_done_rcv = false;
> context_info->is_new_req = false;
> cmd = mrq->cmd;
> +
> + /*
> + * If host has timed out waiting for the sanitize
> + * to complete, card might be still in programming state
> + * so let's try to bring the card out of programming
> + * state.
> + */
> + if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
> + if (!mmc_interrupt_hpi(host->card)) {
> + pr_warning("%s: %s: Interrupted "
> + "sanitize\n",
> + mmc_hostname(host),
> + __func__);
> + cmd->error = 0;
> + break;
> + } else {
> + pr_err("%s: %s: Failed to interrupt "
> + "sanitize\n",
> + mmc_hostname(host), __func__);
> + }
> + }
> if (!cmd->error || !cmd->retries ||
> mmc_card_removed(host->card)) {
> err = host->areq->err_check(host->card,
> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
> index 39613b9..bd06ff5 100644
> --- a/include/linux/mmc/core.h
> +++ b/include/linux/mmc/core.h
> @@ -96,6 +96,8 @@ struct mmc_command {
> */
>
> unsigned int cmd_timeout_ms; /* in milliseconds */
> + /* Set this flag only for blocking sanitize request */
> + bool sanitize_busy;
>
> struct mmc_data *data; /* data segment associated with cmd */
> struct mmc_request *mrq; /* associated request */
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index e326ae2..00c10be 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -281,6 +281,7 @@ struct mmc_host {
> #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
> MMC_CAP2_PACKED_WR)
> #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */
> +#define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */
Is there a specific reason to why a cap is needed? Would it be okay to
use this feature just if the card supports it?
>
> mmc_pm_flag_t pm_caps; /* supported pm features */
>
> --
> 1.7.3.3
> --
> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
Kind regards
Ulf Hansson
Hi Maya,
> -----Original Message-----
> From: [email protected] [mailto:linux-mmc-
> [email protected]] On Behalf Of Maya Erez
> Sent: Wednesday, April 17, 2013 1:39 PM
> To: [email protected]
> Cc: [email protected]; Maya Erez; Yaniv Gardi; open list
> Subject: [PATCH v2] mmc: card: Adding support for sanitize in eMMC 4.5
>
> The sanitize support is added as a user-app ioctl call, and
> was removed from the block-device request, since its purpose is
> to be invoked not via File-System but by a user.
> This feature deletes the unmap memory region of the eMMC card,
> by writing to a specific register in the EXT_CSD.
> unmap region is the memory region that was previously deleted
> (by erase, trim or discard operation).
> In order to avoid timeout when sanitizing large-scale cards,
> the timeout for sanitize operation is 240 seconds.
>
> Signed-off-by: Yaniv Gardi <[email protected]>
> Signed-off-by: Maya Erez <[email protected]>
> ---
> drivers/mmc/card/block.c | 68 +++++++++++++++++++++++++++++++-----------
> ---
> drivers/mmc/card/queue.c | 2 +-
> drivers/mmc/core/core.c | 21 ++++++++++++++
> include/linux/mmc/core.h | 2 +
> include/linux/mmc/host.h | 1 +
> 5 files changed, 72 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index e12a03c..1f043ee 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -58,6 +58,8 @@ MODULE_ALIAS("mmc:block");
> #define INAND_CMD38_ARG_SECTRIM1 0x81
> #define INAND_CMD38_ARG_SECTRIM2 0x88
> #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout
> */
> +#define MMC_SANITIZE_REQ_TIMEOUT 240000
> +#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
>
> #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
> (req->cmd_flags & REQ_META)) && \
> @@ -409,6 +411,35 @@ static int ioctl_rpmb_card_status_poll(struct mmc_card
> *card, u32 *status,
> return err;
> }
>
> +static int ioctl_do_sanitize(struct mmc_card *card)
> +{
> + int err;
> +
> + if (!(mmc_can_sanitize(card) &&
> + (card->host->caps2 & MMC_CAP2_SANITIZE))) {
> + pr_warn("%s: %s - SANITIZE is not supported\n",
> + mmc_hostname(card->host), __func__);
> + err = -EOPNOTSUPP;
> + goto out;
> + }
> +
> + pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
> + mmc_hostname(card->host), __func__);
> +
> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
> + EXT_CSD_SANITIZE_START, 1,
> + MMC_SANITIZE_REQ_TIMEOUT);
> +
> + if (err)
Shouldn't you set the sanitize_busy flag here in case of timeout error?
Otherwise the patch looks good to me.
Thanks,
Luca
> + pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
> + mmc_hostname(card->host), __func__, err);
> +
> + pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
> + __func__);
> +out:
> + return err;
> +}
> +
> static int mmc_blk_ioctl_cmd(struct block_device *bdev,
> struct mmc_ioc_cmd __user *ic_ptr)
> {
> @@ -511,6 +542,16 @@ static int mmc_blk_ioctl_cmd(struct block_device
> *bdev,
> goto cmd_rel_host;
> }
>
> + if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) {
> + err = ioctl_do_sanitize(card);
> +
> + if (err)
> + pr_err("%s: ioctl_do_sanitize() failed. err = %d",
> + __func__, err);
> +
> + goto cmd_rel_host;
> + }
> +
> mmc_wait_for_req(card->host, &mrq);
>
> if (cmd.error) {
> @@ -940,10 +981,10 @@ 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, trim_arg, erase_arg;
> + unsigned int from, nr, arg;
> int err = 0, type = MMC_BLK_SECDISCARD;
>
> - if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
> + if (!(mmc_can_secure_erase_trim(card))) {
> err = -EOPNOTSUPP;
> goto out;
> }
> @@ -951,23 +992,11 @@ static int mmc_blk_issue_secdiscard_rq(struct
> mmc_queue *mq,
> from = blk_rq_pos(req);
> nr = blk_rq_sectors(req);
>
> - /* The sanitize operation is supported at v4.5 only */
> - if (mmc_can_sanitize(card)) {
> - erase_arg = MMC_ERASE_ARG;
> - trim_arg = MMC_TRIM_ARG;
> - } else {
> - erase_arg = MMC_SECURE_ERASE_ARG;
> - trim_arg = MMC_SECURE_TRIM1_ARG;
> - }
> + 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,
> @@ -1003,9 +1032,6 @@ retry:
> goto out;
> }
>
> - 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;
> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
> index 9447a0e..fa9632e 100644
> --- a/drivers/mmc/card/queue.c
> +++ b/drivers/mmc/card/queue.c
> @@ -173,7 +173,7 @@ 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) || mmc_can_sanitize(card))
> + if (mmc_can_secure_erase_trim(card))
> queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
> }
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 37c5dad..dea9381 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -402,6 +402,27 @@ static int mmc_wait_for_data_req_done(struct mmc_host
> *host,
> context_info->is_done_rcv = false;
> context_info->is_new_req = false;
> cmd = mrq->cmd;
> +
> + /*
> + * If host has timed out waiting for the sanitize
> + * to complete, card might be still in programming state
> + * so let's try to bring the card out of programming
> + * state.
> + */
> + if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
> + if (!mmc_interrupt_hpi(host->card)) {
> + pr_warning("%s: %s: Interrupted "
> + "sanitize\n",
> + mmc_hostname(host),
> + __func__);
> + cmd->error = 0;
> + break;
> + } else {
> + pr_err("%s: %s: Failed to interrupt "
> + "sanitize\n",
> + mmc_hostname(host), __func__);
> + }
> + }
> if (!cmd->error || !cmd->retries ||
> mmc_card_removed(host->card)) {
> err = host->areq->err_check(host->card,
> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
> index 39613b9..bd06ff5 100644
> --- a/include/linux/mmc/core.h
> +++ b/include/linux/mmc/core.h
> @@ -96,6 +96,8 @@ struct mmc_command {
> */
>
> unsigned int cmd_timeout_ms; /* in milliseconds */
> + /* Set this flag only for blocking sanitize request */
> + bool sanitize_busy;
>
> struct mmc_data *data; /* data segment associated
> with cmd */
> struct mmc_request *mrq; /* associated request */
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index e326ae2..00c10be 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -281,6 +281,7 @@ struct mmc_host {
> #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
> MMC_CAP2_PACKED_WR)
> #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before
> scan */
> +#define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */
>
> mmc_pm_flag_t pm_caps; /* supported pm features */
>
> --
> 1.7.3.3
> --
> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>
> --
> 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
Hi Luca,
See below (2 comments).
Thanks,
Maya
> Hi Maya,
>
>> -----Original Message-----
>> From: [email protected] [mailto:linux-mmc-
>> [email protected]] On Behalf Of Maya Erez
>> Sent: Wednesday, April 17, 2013 1:39 PM
>> To: [email protected]
>> Cc: [email protected]; Maya Erez; Yaniv Gardi; open list
>> Subject: [PATCH v2] mmc: card: Adding support for sanitize in eMMC 4.5
>>
>> The sanitize support is added as a user-app ioctl call, and
>> was removed from the block-device request, since its purpose is
>> to be invoked not via File-System but by a user.
>> This feature deletes the unmap memory region of the eMMC card,
>> by writing to a specific register in the EXT_CSD.
>> unmap region is the memory region that was previously deleted
>> (by erase, trim or discard operation).
>> In order to avoid timeout when sanitizing large-scale cards,
>> the timeout for sanitize operation is 240 seconds.
>>
>> Signed-off-by: Yaniv Gardi <[email protected]>
>> Signed-off-by: Maya Erez <[email protected]>
>> ---
>> drivers/mmc/card/block.c | 68
>> +++++++++++++++++++++++++++++++-----------
>> ---
>> drivers/mmc/card/queue.c | 2 +-
>> drivers/mmc/core/core.c | 21 ++++++++++++++
>> include/linux/mmc/core.h | 2 +
>> include/linux/mmc/host.h | 1 +
>> 5 files changed, 72 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
>> index e12a03c..1f043ee 100644
>> --- a/drivers/mmc/card/block.c
>> +++ b/drivers/mmc/card/block.c
>> @@ -58,6 +58,8 @@ MODULE_ALIAS("mmc:block");
>> #define INAND_CMD38_ARG_SECTRIM1 0x81
>> #define INAND_CMD38_ARG_SECTRIM2 0x88
>> #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute
>> timeout
>> */
>> +#define MMC_SANITIZE_REQ_TIMEOUT 240000
>> +#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
>>
>> #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
>> (req->cmd_flags & REQ_META)) && \
>> @@ -409,6 +411,35 @@ static int ioctl_rpmb_card_status_poll(struct
>> mmc_card
>> *card, u32 *status,
>> return err;
>> }
>>
>> +static int ioctl_do_sanitize(struct mmc_card *card)
>> +{
>> + int err;
>> +
>> + if (!(mmc_can_sanitize(card) &&
>> + (card->host->caps2 & MMC_CAP2_SANITIZE))) {
>> + pr_warn("%s: %s - SANITIZE is not supported\n",
>> + mmc_hostname(card->host), __func__);
>> + err = -EOPNOTSUPP;
>> + goto out;
>> + }
>> +
>> + pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
>> + mmc_hostname(card->host), __func__);
>> +
>> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> + EXT_CSD_SANITIZE_START, 1,
>> + MMC_SANITIZE_REQ_TIMEOUT);
>> +
>> + if (err)
>
> Shouldn't you set the sanitize_busy flag here in case of timeout error?
> Otherwise the patch looks good to me
>
> Thanks,
> Luca
This is done in __mmc_switch.
I sent an uncomplete patch by mistake. Good catch!
>
>> + pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
>> + mmc_hostname(card->host), __func__, err);
>> +
>> + pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
>> + __func__);
>> +out:
>> + return err;
>> +}
>> +
>> static int mmc_blk_ioctl_cmd(struct block_device *bdev,
>> struct mmc_ioc_cmd __user *ic_ptr)
>> {
>> @@ -511,6 +542,16 @@ static int mmc_blk_ioctl_cmd(struct block_device
>> *bdev,
>> goto cmd_rel_host;
>> }
>>
>> + if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) {
>> + err = ioctl_do_sanitize(card);
>> +
>> + if (err)
>> + pr_err("%s: ioctl_do_sanitize() failed. err = %d",
>> + __func__, err);
>> +
>> + goto cmd_rel_host;
>> + }
>> +
>> mmc_wait_for_req(card->host, &mrq);
>>
>> if (cmd.error) {
>> @@ -940,10 +981,10 @@ 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, trim_arg, erase_arg;
>> + unsigned int from, nr, arg;
>> int err = 0, type = MMC_BLK_SECDISCARD;
>>
>> - if (!(mmc_can_secure_erase_trim(card) || mmc_can_sanitize(card))) {
>> + if (!(mmc_can_secure_erase_trim(card))) {
>> err = -EOPNOTSUPP;
>> goto out;
>> }
>> @@ -951,23 +992,11 @@ static int mmc_blk_issue_secdiscard_rq(struct
>> mmc_queue *mq,
>> from = blk_rq_pos(req);
>> nr = blk_rq_sectors(req);
>>
>> - /* The sanitize operation is supported at v4.5 only */
>> - if (mmc_can_sanitize(card)) {
>> - erase_arg = MMC_ERASE_ARG;
>> - trim_arg = MMC_TRIM_ARG;
>> - } else {
>> - erase_arg = MMC_SECURE_ERASE_ARG;
>> - trim_arg = MMC_SECURE_TRIM1_ARG;
>> - }
>> + 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,
>> @@ -1003,9 +1032,6 @@ retry:
>> goto out;
>> }
>>
>> - 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;
>> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
>> index 9447a0e..fa9632e 100644
>> --- a/drivers/mmc/card/queue.c
>> +++ b/drivers/mmc/card/queue.c
>> @@ -173,7 +173,7 @@ 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) || mmc_can_sanitize(card))
>> + if (mmc_can_secure_erase_trim(card))
>> queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
>> }
>>
>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>> index 37c5dad..dea9381 100644
>> --- a/drivers/mmc/core/core.c
>> +++ b/drivers/mmc/core/core.c
>> @@ -402,6 +402,27 @@ static int mmc_wait_for_data_req_done(struct
>> mmc_host
>> *host,
>> context_info->is_done_rcv = false;
>> context_info->is_new_req = false;
>> cmd = mrq->cmd;
>> +
>> + /*
>> + * If host has timed out waiting for the sanitize
>> + * to complete, card might be still in programming state
>> + * so let's try to bring the card out of programming
>> + * state.
>> + */
>> + if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
>> + if (!mmc_interrupt_hpi(host->card)) {
>> + pr_warning("%s: %s: Interrupted "
>> + "sanitize\n",
>> + mmc_hostname(host),
>> + __func__);
>> + cmd->error = 0;
>> + break;
>> + } else {
>> + pr_err("%s: %s: Failed to interrupt "
>> + "sanitize\n",
>> + mmc_hostname(host), __func__);
>> + }
>> + }
This should be moved to mmc_wait_for_req_done. Sorry for the mistake.
Will send a new patch with the fix.
>> if (!cmd->error || !cmd->retries ||
>> mmc_card_removed(host->card)) {
>> err = host->areq->err_check(host->card,
>> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
>> index 39613b9..bd06ff5 100644
>> --- a/include/linux/mmc/core.h
>> +++ b/include/linux/mmc/core.h
>> @@ -96,6 +96,8 @@ struct mmc_command {
>> */
>>
>> unsigned int cmd_timeout_ms; /* in milliseconds */
>> + /* Set this flag only for blocking sanitize request */
>> + bool sanitize_busy;
>>
>> struct mmc_data *data; /* data segment associated
>> with cmd */
>> struct mmc_request *mrq; /* associated request */
>> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>> index e326ae2..00c10be 100644
>> --- a/include/linux/mmc/host.h
>> +++ b/include/linux/mmc/host.h
>> @@ -281,6 +281,7 @@ struct mmc_host {
>> #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
>> MMC_CAP2_PACKED_WR)
>> #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before
>> scan */
>> +#define MMC_CAP2_SANITIZE (1 << 15) /* Support Sanitize */
>>
>> mmc_pm_flag_t pm_caps; /* supported pm features */
>>
>> --
>> 1.7.3.3
>> --
>> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a
>> member
>> of Code Aurora Forum, hosted by The Linux Foundation
>>
>> --
>> 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
> --
> 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
>
--
Maya Erez
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
Hi Ulf,
You are right, the caps2 flag for Sanitize can be removed.
I will send a fix for that.
Thanks,
Maya
> On 17 April 2013 13:38, Maya Erez <[email protected]> wrote:
>> The sanitize support is added as a user-app ioctl call, and
>> was removed from the block-device request, since its purpose is
>> to be invoked not via File-System but by a user.
>> This feature deletes the unmap memory region of the eMMC card,
>> by writing to a specific register in the EXT_CSD.
>> unmap region is the memory region that was previously deleted
>> (by erase, trim or discard operation).
>> In order to avoid timeout when sanitizing large-scale cards,
>> the timeout for sanitize operation is 240 seconds.
>>
>> Signed-off-by: Yaniv Gardi <[email protected]>
>> Signed-off-by: Maya Erez <[email protected]>
>> ---
>> drivers/mmc/card/block.c | 68
>> +++++++++++++++++++++++++++++++--------------
>> drivers/mmc/card/queue.c | 2 +-
>> drivers/mmc/core/core.c | 21 ++++++++++++++
>> include/linux/mmc/core.h | 2 +
>> include/linux/mmc/host.h | 1 +
>> 5 files changed, 72 insertions(+), 22 deletions(-)
>>
>> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
>> index e12a03c..1f043ee 100644
>> --- a/drivers/mmc/card/block.c
>> +++ b/drivers/mmc/card/block.c
>> @@ -58,6 +58,8 @@ MODULE_ALIAS("mmc:block");
>> #define INAND_CMD38_ARG_SECTRIM1 0x81
>> #define INAND_CMD38_ARG_SECTRIM2 0x88
>> #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute
>> timeout */
>> +#define MMC_SANITIZE_REQ_TIMEOUT 240000
>> +#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
>>
>> #define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
>> (req->cmd_flags & REQ_META)) && \
>> @@ -409,6 +411,35 @@ static int ioctl_rpmb_card_status_poll(struct
>> mmc_card *card, u32 *status,
>> return err;
>> }
>>
>> +static int ioctl_do_sanitize(struct mmc_card *card)
>> +{
>> + int err;
>> +
>> + if (!(mmc_can_sanitize(card) &&
>> + (card->host->caps2 & MMC_CAP2_SANITIZE))) {
>> + pr_warn("%s: %s - SANITIZE is not supported\n",
>> + mmc_hostname(card->host), __func__);
>> + err = -EOPNOTSUPP;
>> + goto out;
>> + }
>> +
>> + pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
>> + mmc_hostname(card->host), __func__);
>> +
>> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> + EXT_CSD_SANITIZE_START, 1,
>> + MMC_SANITIZE_REQ_TIMEOUT);
>> +
>> + if (err)
>> + pr_err("%s: %s - EXT_CSD_SANITIZE_START failed.
>> err=%d\n",
>> + mmc_hostname(card->host), __func__, err);
>> +
>> + pr_debug("%s: %s - SANITIZE COMPLETED\n",
>> mmc_hostname(card->host),
>> + __func__);
>> +out:
>> + return err;
>> +}
>> +
>> static int mmc_blk_ioctl_cmd(struct block_device *bdev,
>> struct mmc_ioc_cmd __user *ic_ptr)
>> {
>> @@ -511,6 +542,16 @@ static int mmc_blk_ioctl_cmd(struct block_device
>> *bdev,
>> goto cmd_rel_host;
>> }
>>
>> + if (MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) ==
>> EXT_CSD_SANITIZE_START) {
>> + err = ioctl_do_sanitize(card);
>> +
>> + if (err)
>> + pr_err("%s: ioctl_do_sanitize() failed. err =
>> %d",
>> + __func__, err);
>> +
>> + goto cmd_rel_host;
>> + }
>> +
>> mmc_wait_for_req(card->host, &mrq);
>>
>> if (cmd.error) {
>> @@ -940,10 +981,10 @@ 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, trim_arg, erase_arg;
>> + unsigned int from, nr, arg;
>> int err = 0, type = MMC_BLK_SECDISCARD;
>>
>> - if (!(mmc_can_secure_erase_trim(card) ||
>> mmc_can_sanitize(card))) {
>> + if (!(mmc_can_secure_erase_trim(card))) {
>> err = -EOPNOTSUPP;
>> goto out;
>> }
>> @@ -951,23 +992,11 @@ static int mmc_blk_issue_secdiscard_rq(struct
>> mmc_queue *mq,
>> from = blk_rq_pos(req);
>> nr = blk_rq_sectors(req);
>>
>> - /* The sanitize operation is supported at v4.5 only */
>> - if (mmc_can_sanitize(card)) {
>> - erase_arg = MMC_ERASE_ARG;
>> - trim_arg = MMC_TRIM_ARG;
>> - } else {
>> - erase_arg = MMC_SECURE_ERASE_ARG;
>> - trim_arg = MMC_SECURE_TRIM1_ARG;
>> - }
>> + 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,
>> @@ -1003,9 +1032,6 @@ retry:
>> goto out;
>> }
>>
>> - 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;
>> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
>> index 9447a0e..fa9632e 100644
>> --- a/drivers/mmc/card/queue.c
>> +++ b/drivers/mmc/card/queue.c
>> @@ -173,7 +173,7 @@ 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) || mmc_can_sanitize(card))
>> + if (mmc_can_secure_erase_trim(card))
>> queue_flag_set_unlocked(QUEUE_FLAG_SECDISCARD, q);
>> }
>>
>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>> index 37c5dad..dea9381 100644
>> --- a/drivers/mmc/core/core.c
>> +++ b/drivers/mmc/core/core.c
>> @@ -402,6 +402,27 @@ static int mmc_wait_for_data_req_done(struct
>> mmc_host *host,
>> context_info->is_done_rcv = false;
>> context_info->is_new_req = false;
>> cmd = mrq->cmd;
>> +
>> + /*
>> + * If host has timed out waiting for the
>> sanitize
>> + * to complete, card might be still in
>> programming state
>> + * so let's try to bring the card out of
>> programming
>> + * state.
>> + */
>> + if (cmd->sanitize_busy && cmd->error ==
>> -ETIMEDOUT) {
>> + if (!mmc_interrupt_hpi(host->card)) {
>> + pr_warning("%s: %s: Interrupted
>> "
>> + "sanitize\n",
>> + mmc_hostname(host),
>> + __func__);
>> + cmd->error = 0;
>> + break;
>> + } else {
>> + pr_err("%s: %s: Failed to
>> interrupt "
>> + "sanitize\n",
>> + mmc_hostname(host),
>> __func__);
>> + }
>> + }
>> if (!cmd->error || !cmd->retries ||
>> mmc_card_removed(host->card)) {
>> err = host->areq->err_check(host->card,
>> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
>> index 39613b9..bd06ff5 100644
>> --- a/include/linux/mmc/core.h
>> +++ b/include/linux/mmc/core.h
>> @@ -96,6 +96,8 @@ struct mmc_command {
>> */
>>
>> unsigned int cmd_timeout_ms; /* in milliseconds */
>> + /* Set this flag only for blocking sanitize request */
>> + bool sanitize_busy;
>>
>> struct mmc_data *data; /* data segment
>> associated with cmd */
>> struct mmc_request *mrq; /* associated request */
>> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>> index e326ae2..00c10be 100644
>> --- a/include/linux/mmc/host.h
>> +++ b/include/linux/mmc/host.h
>> @@ -281,6 +281,7 @@ struct mmc_host {
>> #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
>> MMC_CAP2_PACKED_WR)
>> #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before
>> scan */
>> +#define MMC_CAP2_SANITIZE (1 << 15) /* Support
>> Sanitize */
>
> Is there a specific reason to why a cap is needed? Would it be okay to
> use this feature just if the card supports it?
>
>>
>> mmc_pm_flag_t pm_caps; /* supported pm features
>> */
>>
>> --
>> 1.7.3.3
>> --
>> QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a
>> member
>> of Code Aurora Forum, hosted by The Linux Foundation
>>
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>
> Kind regards
> Ulf Hansson
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--
Maya Erez
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation