Hi
I will fix your comment and resend the patch.
Thank you.
Best Regards,
Jaehoon Chung
On 07/17/2012 06:25 PM, S, Venkatraman wrote:
> Some minor nits..
>
> On Tue, Jul 17, 2012 at 8:14 AM, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote:
>> Enable eMMC background operations (BKOPS) feature.
>>
>> If URGENT_BKOPS is set after a response, note that BKOPS
>> are required. After all I/O requests are finished, run
>> BKOPS if required. Should read/write operations be requested
>> during BKOPS, first issue HPI to interrupt the ongoing BKOPS
>> and then service the request.
>> If BKOPS-STATUS is upper than LEVEL2, need to check until clear
>> the BKOPS-STATUS vaule.
>>
>> If you want to enable this feature, set MMC_CAP2_BKOPS.
>>
>> I tested with dw-mmc and sdhci controller.
>> When repeating the writing 1GB data, at a certain time, performance is decreased.
>> At that time, card is also triggered the Level-3 or Level-2.
>> After running bkops, performance is recovered.
>>
>> Future considerations
>> * Check BKOPS_LEVEL=1 and start BKOPS in a preventive manner.
>> * Interrupt ongoing BKOPS before powering off the card.
>> * How get BKOPS_STATUS value.(periodically send ext_csd command?)
>> * If use periodic bkops, also consider runtime_pm control.
>>
>> Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
>> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
>> Signed-off-by: Konstantin Dorfman <kdorfman@xxxxxxxxxxxxxx>
>> Signed-off-by: Maya Erez <merez@xxxxxxxxxxxxxx>
>> ---
>> Changelog v10:
>> - Based on latest mmc-next
>> - Only control the level-2/3.
>> : If triggered upper than level2, immediately start bkops.
>> - Revmoe the BKOPS_CAP2_INIT_BKOPS (move into mmc-util)
>> - change use_busy_signal instead of waiting_for_prog_done for __mmc_switch
>> Changelog V9:
>> - Rebased on patch-v7.
>> - Added Konstantin and Maya's patch
>> : mmc:core: Define synchronous BKOPS timeout
>> : mmc:core: eMMC4.5 BKOPS fixes
>> - Removed periodic bkops
>> : This feature will do in future work
>> - Add __mmc_switch() for waiting_for_prod_done.
>>
>> Changelog V8:
>> - Remove host->lock spin lock reviewed by Adrian
>> - Support periodic start bkops
>> - when bkops_status is level-3, if timeout is set to 0, send hpi.
>> - Move the start-bkops point
>> Changelog V7:
>> - Use HPI command when issued URGENT_BKOPS
>> - Recheck until clearing the bkops-status bit.
>> Changelog V6:
>> - Add the flag of check-bkops-status.
>> (For fixing async_req problem)
>> - Add the capability for MMC_CAP2_INIT_BKOPS.
>> (When unset the bkops_en bit in ext_csd register)
>> - modify the wrong condition.
>> Changelog V5:
>> - Rebase based on the latest mmc-next.
>> - modify codes based-on Chris's comment
>> Changelog V4:
>> - Add mmc_read_bkops_status
>> - When URGENT_BKOPS(level2-3), didn't use HPI command.
>> - In mmc_switch(), use R1B/R1 according to level.
>> Changelog V3:
>> - move the bkops setting's location in mmc_blk_issue_rw_rq
>> - modify condition checking
>> - bkops_en is assigned ext_csd[EXT_CSD_BKOPS_EN] instead of "1"
>> - remove the unused code
>> - change pr_debug instead of pr_warn in mmc_send_hpi_cmd
>> - Add the Future consideration suggested by Per
>> Changelog V2:
>> - Use EXCEPTION_STATUS instead of URGENT_BKOPS
>> - Add function to check Exception_status(for eMMC4.5)
>> ---
>> drivers/mmc/core/core.c | 161 +++++++++++++++++++++++++++++++++++++++++++-
>> drivers/mmc/core/mmc.c | 11 +++
>> drivers/mmc/core/mmc_ops.c | 27 ++++++-
>> include/linux/mmc/card.h | 16 +++++
>> include/linux/mmc/core.h | 5 ++
>> include/linux/mmc/host.h | 2 +-
>> include/linux/mmc/mmc.h | 19 +++++-
>> 7 files changed, 233 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>> index 9503cab..52bdd33 100644
>> --- a/drivers/mmc/core/core.c
>> +++ b/drivers/mmc/core/core.c
>> @@ -41,6 +41,12 @@
>> #include "sd_ops.h"
>> #include "sdio_ops.h"
>>
>> +/*
>> + * The Background operation can take a long time, depends on the house keeping
>> + * operations the card has to perform
>> + */
>> +#define MMC_BKOPS_MAX_TIMEOUT (4 * 60 * 1000) /* max time to wait in ms */
>> +
>> static struct workqueue_struct *workqueue;
>> static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
>>
>> @@ -245,6 +251,68 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
>> host->ops->request(host, mrq);
>> }
>>
>> +/**
>> + * mmc_start_bkops - start BKOPS for supported cards
>> + * @card: MMC card to start BKOPS
>> + *
>> + * Start background operations whenever requested.
>> + * when the urgent BKOPS bit is set in a R1 command response
>> + * then background operations should be started immediately.
>> +*/
>> +void mmc_start_bkops(struct mmc_card *card)
>> +{
>> + int err;
>> + int timeout;
>> + u8 use_busy_signal;
>> +
>> + BUG_ON(!card);
>> + if (!card->ext_csd.bkops_en || !(card->host->caps2 & MMC_CAP2_BKOPS))
>> + return;
>> +
>> + if (mmc_is_exception_event(card, EXT_CSD_URGENT_BKOPS))
>> + if (card->ext_csd.raw_bkops_status)
>> + mmc_card_set_need_bkops(card);
>> +
>> + /*
>> + * If card is already doing bkops or need for
>> + * bkops flag is not set, then do nothing just
>> + * return
>> + */
> Redundant comments. It is obvious from the code.
>
>> + if (mmc_card_doing_bkops(card) || !mmc_card_need_bkops(card))
> This check can be split into two. The mmc_card_doing_bkops() part
> should go above the _is_exception_event() check, and can save an extra
> EXT_CSD read.
>
> The second part can be folded as an else part of the
> ""
> + if (card->ext_csd.raw_bkops_status)
> + mmc_card_set_need_bkops(card);
> ""
> above.. and return.
>
>> + return;
>> +
>> + mmc_claim_host(card->host);
>> + if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) {
>> + timeout = MMC_BKOPS_MAX_TIMEOUT;
>> + use_busy_signal = 0;
>> + } else {
>> + timeout = 0;
>> + use_busy_signal = 1;
>> + }
>> +
>> + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>> + EXT_CSD_BKOPS_START, 1, timeout, use_busy_signal);
>> + if (err) {
>> + pr_warn("%s: error %d starting bkops\n",
>> + mmc_hostname(card->host), err);
>> + mmc_card_clr_need_bkops(card);
>> + goto out;
>> + }
>> +
>> + mmc_card_clr_need_bkops(card);
>> +
>> + /*
>> + * For urgent bkops status (LEVEL_2 and more)
>> + * bkops executed synchronously, otherwise
>> + * the operation is in progress
>> + */
>> + if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
> This line can be replaced with
> if (use_busy_signal)
> for consistency.
>
>> + mmc_card_set_doing_bkops(card);
>> +out:
>> + mmc_release_host(card->host);
>> +}
>> +EXPORT_SYMBOL(mmc_start_bkops);
>> +
>> static void mmc_wait_done(struct mmc_request *mrq)
>> {
>> complete(&mrq->completion);
>> @@ -354,6 +422,20 @@ struct mmc_async_req *mmc_start_req(struct mmc_host *host,
>> if (host->areq) {
>> mmc_wait_for_req_done(host, host->areq->mrq);
>> err = host->areq->err_check(host->card, host->areq);
>> + /*
>> + * Check BKOPS urgency from each R1 response
> s/from/for
>
>> + */
>> + if (host->card && mmc_card_mmc(host->card) &&
>> + ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) ||
>> + (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) &&
>> + (host->areq->mrq->cmd->resp[0] & R1_EXP_EVENT))
>> + mmc_start_bkops(host->card);
>> + /*
>> + * If areq exsit,
>
> Typo s/exsit/exist
>
>> + * we stop the bkops for foreground operation
>> + */
>> + if (areq && mmc_card_doing_bkops(host->card))
>> + err = mmc_stop_bkops(host->card);
>> }
>>
>> if (!err && areq)
>> @@ -488,6 +570,72 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries
>>
>> EXPORT_SYMBOL(mmc_wait_for_cmd);
>>
>> +/*
>> + * mmc_stop_bkops - stop ongoing BKOPS
>> + * @card: MMC card to check BKOPS
>> + *
>> + * Send HPI command to stop ongoing background operations,
>> + * to allow rapid servicing of foreground operations,e.g. read/
>> + * writes. Wait until the card comes out of the programming state
>> + * to avoid errors in servicing read/write requests.
>> + */
>> +int mmc_stop_bkops(struct mmc_card *card)
>> +{
>> + int err = 0;
>> +
>> + BUG_ON(!card);
>> + err = mmc_interrupt_hpi(card);
>> +
>> + /*
>> + * if err is EINVAL, it's status that can't issue HPI.
>> + * Maybe it should be completed the BKOPS.
>> + */
>> + if (!err || (err == -EINVAL)) {
>> + mmc_card_clr_doing_bkops(card);
>> + err = 0;
>> + }
>> +
>> + return err;
>> +}
>> +EXPORT_SYMBOL(mmc_stop_bkops);
>> +
>> +int mmc_read_bkops_status(struct mmc_card *card)
>> +{
>> + int err;
>> + u8 ext_csd[512];
>> +
>> + mmc_claim_host(card->host);
>> + err = mmc_send_ext_csd(card, ext_csd);
>> + mmc_release_host(card->host);
>> + if (err)
>> + return err;
>> +
>> + card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
>> + card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL(mmc_read_bkops_status);
>> +
>> +int mmc_is_exception_event(struct mmc_card *card, unsigned int value)
>> +{
>> + int err;
>> +
>> + err = mmc_read_bkops_status(card);
>> + if (err) {
>> + pr_err("%s: Didn't read bkops status : %d\n",
>> + mmc_hostname(card->host), err);
>> + return 0;
>> + }
>> +
>> + /* In eMMC 4.41, R1_EXCEPTION_EVENT is URGENT_BKOPS */
>> + if (card->ext_csd.rev == 5)
>> + return 1;
>> +
>> + return (card->ext_csd.raw_exception_status & value) ? 1 : 0;
>> +}
>> +EXPORT_SYMBOL(mmc_is_exception_event);
>> +
>> /**
>> * mmc_set_data_timeout - set the timeout for a data command
>> * @data: data phase for command
>> @@ -2328,8 +2476,14 @@ int mmc_suspend_host(struct mmc_host *host)
>> mmc_bus_get(host);
>> if (host->bus_ops && !host->bus_dead) {
>>
>> - if (host->bus_ops->suspend)
>> + if (host->bus_ops->suspend) {
>> + if (mmc_card_doing_bkops(host->card)) {
>> + err = mmc_stop_bkops(host->card);
>> + if (err)
>> + goto out;
>> + }
>> err = host->bus_ops->suspend(host);
>> + }
>>
>> if (err == -ENOSYS || !host->bus_ops->resume) {
>> /*
>> @@ -2416,6 +2570,11 @@ int mmc_pm_notify(struct notifier_block *notify_block,
>> switch (mode) {
>> case PM_HIBERNATION_PREPARE:
>> case PM_SUSPEND_PREPARE:
>> + if (host->card && mmc_card_mmc(host->card) &&
>> + mmc_card_doing_bkops(host->card)) {
>> + mmc_interrupt_hpi(host->card);
>
> Better to use mmc_stop_bkops() instead of mmc_interrupt_hpi() ?
>
>> + mmc_card_clr_doing_bkops(host->card);
>> + }
>>
>> spin_lock_irqsave(&host->lock, flags);
>> host->rescan_disable = 1;
>> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
>> index 7150f02..6fbffb6 100644
>> --- a/drivers/mmc/core/mmc.c
>> +++ b/drivers/mmc/core/mmc.c
>> @@ -463,6 +463,17 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
>> }
>>
>> if (card->ext_csd.rev >= 5) {
>> + /* check whether the eMMC card support BKOPS */
>> + if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
>> + card->ext_csd.bkops = 1;
>> + card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
>> + card->ext_csd.raw_bkops_status =
>> + ext_csd[EXT_CSD_BKOPS_STATUS];
>> + if (!card->ext_csd.bkops_en)
>> + pr_info("%s: Didn't set BKOPS_EN bit!\n",
>> + mmc_hostname(card->host));
>> + }
>> +
>> /* check whether the eMMC card supports HPI */
>> if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
>> card->ext_csd.hpi = 1;
>> diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
>> index 4ad994a..baf90e0 100644
>> --- a/drivers/mmc/core/mmc_ops.c
>> +++ b/drivers/mmc/core/mmc_ops.c
>> @@ -368,18 +368,19 @@ int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
>> }
>>
>> /**
>> - * mmc_switch - modify EXT_CSD register
>> + * __mmc_switch - modify EXT_CSD register
>> * @card: the MMC card associated with the data transfer
>> * @set: cmd set values
>> * @index: EXT_CSD register index
>> * @value: value to program into EXT_CSD register
>> * @timeout_ms: timeout (ms) for operation performed by register write,
>> * timeout of zero implies maximum possible timeout
>> + * @wait_for_prod_done: is waiting for program done
>> *
>> * Modifies the EXT_CSD register for selected card.
>> */
>> -int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
>> - unsigned int timeout_ms)
>> +int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
>> + unsigned int timeout_ms, u8 use_busy_signal)
>> {
>> int err;
>> struct mmc_command cmd = {0};
>> @@ -393,13 +394,24 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
>> (index << 16) |
>> (value << 8) |
>> set;
>> - cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
>> +
>> + cmd.flags = MMC_CMD_AC;
>> + if (use_busy_signal)
>> + cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
>> + else
>> + cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
>> +
>> cmd.cmd_timeout_ms = timeout_ms;
>>
>> err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
>> if (err)
>> return err;
>>
>> + /* No need to check card status in case of BKOPS LEVEL2 switch*/
>> + if ((index == EXT_CSD_BKOPS_START) &&
>> + (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2))
> Please don't mix policy into utility functions. May be replace with
> use_busy_signal check instead.
>
>> + return 0;
>> +
>> /* Must check status to be sure of no errors */
>> do {
>> err = mmc_send_status(card, &status);
>> @@ -424,6 +436,13 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
>>
>> return 0;
>> }
>> +EXPORT_SYMBOL_GPL(__mmc_switch);
>> +
>> +int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
>> + unsigned int timeout_ms)
>> +{
>> + return __mmc_switch(card, set, index, value, timeout_ms, 1);
>> +}
>> EXPORT_SYMBOL_GPL(mmc_switch);
>>
>> int mmc_send_status(struct mmc_card *card, u32 *status)
>> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
>> index cdfbc3c..b9e11aa 100644
>> --- a/include/linux/mmc/card.h
>> +++ b/include/linux/mmc/card.h
>> @@ -79,10 +79,13 @@ struct mmc_ext_csd {
>> bool hpi_en; /* HPI enablebit */
>> bool hpi; /* HPI support bit */
>> unsigned int hpi_cmd; /* cmd used as HPI */
>> + bool bkops; /* background support bit */
>> + bool bkops_en; /* background enable bit */
>> unsigned int data_sector_size; /* 512 bytes or 4KB */
>> unsigned int data_tag_unit_size; /* DATA TAG UNIT size */
>> unsigned int boot_ro_lock; /* ro lock support */
>> bool boot_ro_lockable;
>> + u8 raw_exception_status; /* 53 */
>> u8 raw_partition_support; /* 160 */
>> u8 raw_erased_mem_count; /* 181 */
>> u8 raw_ext_csd_structure; /* 194 */
>> @@ -96,6 +99,7 @@ struct mmc_ext_csd {
>> u8 raw_sec_erase_mult; /* 230 */
>> u8 raw_sec_feature_support;/* 231 */
>> u8 raw_trim_mult; /* 232 */
>> + u8 raw_bkops_status; /* 246 */
>> u8 raw_sectors[4]; /* 212 - 4 bytes */
>>
>> unsigned int feature_support;
>> @@ -229,6 +233,9 @@ struct mmc_card {
>> #define MMC_CARD_REMOVED (1<<7) /* card has been removed */
>> #define MMC_STATE_HIGHSPEED_200 (1<<8) /* card is in HS200 mode */
>> #define MMC_STATE_SLEEP (1<<9) /* card is in sleep state */
>> +#define MMC_STATE_NEED_BKOPS (1<<10) /* card need to do BKOPS */
>> +#define MMC_STATE_DOING_BKOPS (1<<11) /* card is doing BKOPS */
>> +#define MMC_STATE_CHECK_BKOPS (1<<12) /* card need to check BKOPS */
>> unsigned int quirks; /* card quirks */
>> #define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes outside of the VS CCCR range */
>> #define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) /* use func->cur_blksize */
>> @@ -400,6 +407,9 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
>> #define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
>> #define mmc_card_removed(c) ((c) && ((c)->state & MMC_CARD_REMOVED))
>> #define mmc_card_is_sleep(c) ((c)->state & MMC_STATE_SLEEP)
>> +#define mmc_card_need_bkops(c) ((c)->state & MMC_STATE_NEED_BKOPS)
>> +#define mmc_card_doing_bkops(c) ((c)->state & MMC_STATE_DOING_BKOPS)
>> +#define mmc_card_check_bkops(c) ((c)->state & MMC_STATE_CHECK_BKOPS)
>>
>> #define mmc_card_set_present(c) ((c)->state |= MMC_STATE_PRESENT)
>> #define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
>> @@ -412,7 +422,13 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
>> #define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
>> #define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
>> #define mmc_card_set_sleep(c) ((c)->state |= MMC_STATE_SLEEP)
>> +#define mmc_card_set_need_bkops(c) ((c)->state |= MMC_STATE_NEED_BKOPS)
>> +#define mmc_card_set_doing_bkops(c) ((c)->state |= MMC_STATE_DOING_BKOPS)
>> +#define mmc_card_set_check_bkops(c) ((c)->state |= MMC_STATE_CHECK_BKOPS)
>>
>> +#define mmc_card_clr_need_bkops(c) ((c)->state &= ~MMC_STATE_NEED_BKOPS)
>> +#define mmc_card_clr_doing_bkops(c) ((c)->state &= ~MMC_STATE_DOING_BKOPS)
>> +#define mmc_card_clr_check_bkops(c) ((c)->state &= ~MMC_STATE_CHECK_BKOPS)
>> #define mmc_card_clr_sleep(c) ((c)->state &= ~MMC_STATE_SLEEP)
>> /*
>> * Quirk add/remove for MMC products.
>> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
>> index d787037..fa5641d 100644
>> --- a/include/linux/mmc/core.h
>> +++ b/include/linux/mmc/core.h
>> @@ -137,6 +137,9 @@ struct mmc_host;
>> struct mmc_card;
>> struct mmc_async_req;
>>
>> +extern int mmc_stop_bkops(struct mmc_card *);
>> +extern int mmc_read_bkops_status(struct mmc_card *);
>> +extern int mmc_is_exception_event(struct mmc_card *, unsigned int);
>> extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
>> struct mmc_async_req *, int *);
>> extern int mmc_interrupt_hpi(struct mmc_card *);
>> @@ -145,6 +148,8 @@ extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
>> extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
>> extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
>> struct mmc_command *, int);
>> +extern void mmc_start_bkops(struct mmc_card *card);
>> +extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, u8);
>> extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
>> extern int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
>>
>> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>> index 79d8921..35b7ce8 100644
>> --- a/include/linux/mmc/host.h
>> +++ b/include/linux/mmc/host.h
>> @@ -273,7 +273,7 @@ struct mmc_host {
>> #define MMC_CAP2_PACKED_WR (1 << 21) /* Allow packed write */
>> #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
>> MMC_CAP2_PACKED_WR) /* Allow packed commands */
>> -
>> +#define MMC_CAP2_BKOPS (1 << 22) /* BKOPS supported */
>> mmc_pm_flag_t pm_caps; /* supported pm features */
>> unsigned int power_notify_type;
>> #define MMC_HOST_PW_NOTIFY_NONE 0
>> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
>> index 254901a..e7396b4 100644
>> --- a/include/linux/mmc/mmc.h
>> +++ b/include/linux/mmc/mmc.h
>> @@ -285,6 +285,8 @@ struct _mmc_csd {
>> #define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
>> #define EXT_CSD_HPI_MGMT 161 /* R/W */
>> #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
>> +#define EXT_CSD_BKOPS_EN 163 /* R/W */
>> +#define EXT_CSD_BKOPS_START 164 /* W */
>> #define EXT_CSD_SANITIZE_START 165 /* W */
>> #define EXT_CSD_WR_REL_PARAM 166 /* RO */
>> #define EXT_CSD_BOOT_WP 173 /* R/W */
>> @@ -318,6 +320,7 @@ struct _mmc_csd {
>> #define EXT_CSD_PWR_CL_200_360 237 /* RO */
>> #define EXT_CSD_PWR_CL_DDR_52_195 238 /* RO */
>> #define EXT_CSD_PWR_CL_DDR_52_360 239 /* RO */
>> +#define EXT_CSD_BKOPS_STATUS 246 /* RO */
>> #define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
>> #define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
>> #define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
>> @@ -325,6 +328,7 @@ struct _mmc_csd {
>> #define EXT_CSD_DATA_TAG_SUPPORT 499 /* RO */
>> #define EXT_CSD_MAX_PACKED_WRITES 500 /* RO */
>> #define EXT_CSD_MAX_PACKED_READS 501 /* RO */
>> +#define EXT_CSD_BKOPS_SUPPORT 502 /* RO */
>> #define EXT_CSD_HPI_FEATURES 503 /* RO */
>>
>> /*
>> @@ -387,12 +391,23 @@ struct _mmc_csd {
>>
>> #define EXT_CSD_PACKED_EVENT_EN (1 << 3)
>>
>> -#define EXT_CSD_PACKED_FAILURE (1 << 3)
>> -
>> #define EXT_CSD_PACKED_GENERIC_ERROR (1 << 0)
>> #define EXT_CSD_PACKED_INDEXED_ERROR (1 << 1)
>>
>> /*
>> + * EXCEPTION_EVENT_STATUS field (eMMC4.5)
>> + */
>> +#define EXT_CSD_URGENT_BKOPS BIT(0)
>> +#define EXT_CSD_DYNCAP_NEEDED BIT(1)
>> +#define EXT_CSD_SYSPOOL_EXHAUSTED BIT(2)
>> +#define EXT_CSD_PACKED_FAILURE BIT(3)
>> +
>> +/*
>> + * BKOPS status level
>> + */
>> +#define EXT_CSD_BKOPS_LEVEL_2 0x2
>> +
>> +/*
>> * MMC_SWITCH access modes
>> */
>>
>> --
>> 1.7.4.1
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