2012/1/19 Adrian Hunter <adrian.hunter@xxxxxxxxx>:
> On 19/01/12 13:33, Jaehoon Chung wrote:
>> Hi Adrian.
>>
>> On 01/19/2012 07:21 PM, Adrian Hunter wrote:
>>
>>> On 19/01/12 07:29, Jaehoon Chung 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.
>>>
>>> This still does not seem to address my earlier comment which was:
>>>
>>> The main problem with bkops is:
>>>
>>> If the status is at level 3 ("critical"), some operations
>>> may extend beyond their original timeouts due to maintenance
>>> operations which cannot be delayed anymore.
>>>
>>> This means:
>>>
>>> 1. at level 3 either bkops are run or the timeout of the next
>>> (data?) operation is extended
>>>
>>> 2. at level 3 either the bkops must not be interrupted or the
>>> level must be rechecked after interruption and bkops run again
>>> if the level is still 3, or the timeout of the next (data?)
>>> operation is extended
>>>
>>
>> This patch didn't issue the HPI when bkops-status is level2-3
>> (URGENT_BKOPS case).
>> I didn't understand that must be recheck?? it's case of using HPI..?
>> If HPI didn't issue,though must be recheck bkops status?
>> And level-1 control should be considered for future-work.
>> I will also modify the patch comment..it's confused something.
>
> 1. Say there are 2 write requests queued and after the first write request
> the bkops level is 3. That means the 2nd write request may timeout because
> the normal timeout rules do not apply.
>
> Thus:
> 1. at level 3 either bkops are run or the timeout of the next
> (data?) operation is extended
>
> 2. Say you are running bkops because the level was 3 and a write request
> arrives. You use HPI to interrupt the bkops, but the bkops level may still
> be 3, so the write request may timeout. Hence:
>
> 2. at level 3 either the bkops must not be interrupted or the
> level must be rechecked after interruption and bkops run again
> if the level is still 3, or the timeout of the next (data?)
> operation is extended
Right...may still be level-3..if use the HPI.
Hmm...
if my understanding is right, it's problem about next request when
running urgnet-bkops.
I will consider your comment...and more thinking for these problem.
Then i will resend the patch..:)
Thanks a lot..Adrian..
Best regards,
Jaehoon Chung
>
>>
>> Thanks,
>> Jaehoon Chung
>>
>>>>
>>>> If you want to enable this feature, set MMC_CAP2_BKOPS.
>>>> And if you want to set the BKOPS_EN bit in ext_csd register,
>>>> use the MMC_CAP2_INIT_BKOPS.
>>>>
>>>> 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?)
>>>>
>>>> Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
>>>> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
>>>> ---
>>>> 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/card/block.c | 7 +++
>>>> drivers/mmc/card/queue.c | 3 +
>>>> drivers/mmc/core/core.c | 116 ++++++++++++++++++++++++++++++++++++++++++++
>>>> drivers/mmc/core/mmc.c | 18 +++++++
>>>> drivers/mmc/core/mmc_ops.c | 11 ++++-
>>>> include/linux/mmc/card.h | 20 ++++++++
>>>> include/linux/mmc/core.h | 4 ++
>>>> include/linux/mmc/host.h | 3 +
>>>> include/linux/mmc/mmc.h | 19 +++++++
>>>> 9 files changed, 200 insertions(+), 1 deletions(-)
>>>>
>>>> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
>>>> index 176b78e..743b977 100644
>>>> --- a/drivers/mmc/card/block.c
>>>> +++ b/drivers/mmc/card/block.c
>>>> @@ -1284,6 +1284,13 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
>>>> type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
>>>> mmc_queue_bounce_post(mq_rq);
>>>>
>>>> + /*
>>>> + * Check BKOPS urgency from each R1 response
>>>> + */
>>>> + if (mmc_card_mmc(card) &&
>>>> + (brq->cmd.resp[0] & R1_EXCEPTION_EVENT))
>>>> + mmc_card_set_check_bkops(card);
>>>> +
>>>> switch (status) {
>>>> case MMC_BLK_SUCCESS:
>>>> case MMC_BLK_PARTIAL:
>>>> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
>>>> index 2517547..fd11a31 100644
>>>> --- a/drivers/mmc/card/queue.c
>>>> +++ b/drivers/mmc/card/queue.c
>>>> @@ -66,6 +66,8 @@ static int mmc_queue_thread(void *d)
>>>> spin_unlock_irq(q->queue_lock);
>>>>
>>>> if (req || mq->mqrq_prev->req) {
>>>> + if (mmc_card_doing_bkops(mq->card))
>>>> + mmc_interrupt_bkops(mq->card);
>>>> set_current_state(TASK_RUNNING);
>>>> mq->issue_fn(mq, req);
>>>> } else {
>>>> @@ -73,6 +75,7 @@ static int mmc_queue_thread(void *d)
>>>> set_current_state(TASK_RUNNING);
>>>> break;
>>>> }
>>>> + mmc_start_bkops(mq->card);
>>>> up(&mq->thread_sem);
>>>> schedule();
>>>> down(&mq->thread_sem);
>>>> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
>>>> index bec0bf2..9cfb356 100644
>>>> --- a/drivers/mmc/core/core.c
>>>> +++ b/drivers/mmc/core/core.c
>>>> @@ -238,6 +238,59 @@ 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;
>>>> + unsigned long flags;
>>>> +
>>>> + BUG_ON(!card);
>>>> + if (!card->ext_csd.bkops_en || !(card->host->caps2 & MMC_CAP2_BKOPS))
>>>> + return;
>>>> +
>>>> + if (mmc_card_check_bkops(card)) {
>>>> + spin_lock_irqsave(&card->host->lock, flags);
>>>> + mmc_card_clr_check_bkops(card);
>>>> + spin_unlock_irqrestore(&card->host->lock, flags);
>>>> + if (mmc_is_exception_event(card, EXT_CSD_URGENT_BKOPS))
>>>> + 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
>>>> + */
>>>> + if (mmc_card_doing_bkops(card) || !mmc_card_need_bkops(card))
>>>> + return;
>>>> +
>>>> + mmc_claim_host(card->host);
>>>> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>>>> + EXT_CSD_BKOPS_START, 1, 0);
>>>> + if (err) {
>>>> + pr_warning("%s: error %d starting bkops\n",
>>>> + mmc_hostname(card->host), err);
>>>> + mmc_card_clr_need_bkops(card);
>>>> + goto out;
>>>> + }
>>>> +
>>>> + spin_lock_irqsave(&card->host->lock, flags);
>>>> + mmc_card_clr_need_bkops(card);
>>>> + if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
>>>> + mmc_card_set_doing_bkops(card);
>>>> + spin_unlock_irqrestore(&card->host->lock, flags);
>>>> +out:
>>>> + mmc_release_host(card->host);
>>>> +}
>>>> +EXPORT_SYMBOL(mmc_start_bkops);
>>>> +
>>>> static void mmc_wait_done(struct mmc_request *mrq)
>>>> {
>>>> complete(&mrq->completion);
>>>> @@ -472,6 +525,69 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries
>>>> EXPORT_SYMBOL(mmc_wait_for_cmd);
>>>>
>>>> /**
>>>> + * mmc_interrupt_bkops - interrupt ongoing BKOPS
>>>> + * @card: MMC card to check BKOPS
>>>> + *
>>>> + * Send HPI command to interrupt 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_interrupt_bkops(struct mmc_card *card)
>>>> +{
>>>> + int err = 0;
>>>> + unsigned long flags;
>>>> +
>>>> + BUG_ON(!card);
>>>> +
>>>> + err = mmc_interrupt_hpi(card);
>>>> +
>>>> + spin_lock_irqsave(&card->host->lock, flags);
>>>> + mmc_card_clr_doing_bkops(card);
>>>> + spin_unlock_irqrestore(&card->host->lock, flags);
>>>> +
>>>> + return err;
>>>> +}
>>>> +EXPORT_SYMBOL(mmc_interrupt_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_EXCEPTION_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
>>>> * @card: the MMC card associated with the data transfer
>>>> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
>>>> index dc03291..7ca2315 100644
>>>> --- a/drivers/mmc/core/mmc.c
>>>> +++ b/drivers/mmc/core/mmc.c
>>>> @@ -480,6 +480,24 @@ 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 &&
>>>> + card->host->caps2 & MMC_CAP2_INIT_BKOPS) {
>>>> + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
>>>> + EXT_CSD_BKOPS_EN, 1, 0);
>>>> + if (err)
>>>> + pr_warning("%s: Enabling BKOPS failed\n",
>>>> + mmc_hostname(card->host));
>>>> + else
>>>> + card->ext_csd.bkops_en = 1;
>>>> + }
>>>> + }
>>>> +
>>>> /* 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 4d41fa9..109d0f0 100644
>>>> --- a/drivers/mmc/core/mmc_ops.c
>>>> +++ b/drivers/mmc/core/mmc_ops.c
>>>> @@ -392,13 +392,22 @@ 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 (index == EXT_CSD_BKOPS_START &&
>>>> + card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
>>>> + cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
>>>> + else
>>>> + cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
>>>> 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 switch*/
>>>> + if (index == EXT_CSD_BKOPS_START)
>>>> + return 0;
>>>> +
>>>> /* Must check status to be sure of no errors */
>>>> do {
>>>> err = mmc_send_status(card, &status);
>>>> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
>>>> index f9a0663..d87f58c 100644
>>>> --- a/include/linux/mmc/card.h
>>>> +++ b/include/linux/mmc/card.h
>>>> @@ -71,10 +71,13 @@ 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 */
>>>> @@ -88,6 +91,7 @@ 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;
>>>> @@ -219,6 +223,10 @@ struct mmc_card {
>>>> #define MMC_CARD_SDXC (1<<6) /* card is SDXC */
>>>> #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_NEED_BKOPS (1<<9) /* card need to do BKOPS */
>>>> +#define MMC_STATE_DOING_BKOPS (1<<10) /* card is doing BKOPS */
>>>> +#define MMC_STATE_CHECK_BKOPS (1<<11) /* 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 */
>>>> @@ -384,6 +392,10 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
>>>> #define mmc_sd_card_uhs(c) ((c)->state & MMC_STATE_ULTRAHIGHSPEED)
>>>> #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_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)
>>>> @@ -395,6 +407,14 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
>>>> #define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
>>>> #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_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)
>>>> +
>>>>
>>>> /*
>>>> * Quirk add/remove for MMC products.
>>>> diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
>>>> index 87a976c..45357c7 100644
>>>> --- a/include/linux/mmc/core.h
>>>> +++ b/include/linux/mmc/core.h
>>>> @@ -134,6 +134,9 @@ struct mmc_host;
>>>> struct mmc_card;
>>>> struct mmc_async_req;
>>>>
>>>> +extern int mmc_interrupt_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 *);
>>>> @@ -163,6 +166,7 @@ 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);
>>>> +extern void mmc_start_bkops(struct mmc_card *card);
>>>> extern unsigned int mmc_calc_max_discard(struct mmc_card *card);
>>>>
>>>> extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
>>>> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
>>>> index dd13e05..8432e6a 100644
>>>> --- a/include/linux/mmc/host.h
>>>> +++ b/include/linux/mmc/host.h
>>>> @@ -257,6 +257,9 @@ struct mmc_host {
>>>> #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */
>>>> #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \
>>>> MMC_CAP2_HS200_1_2V_SDR)
>>>> +#define MMC_CAP2_BKOPS (1 << 7) /* BKOPS supported */
>>>> +#define MMC_CAP2_INIT_BKOPS (1 << 8) /* Need to set BKOPS_EN */
>>>> +
>>>>
>>>> mmc_pm_flag_t pm_caps; /* supported pm features */
>>>> unsigned int power_notify_type;
>>>> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
>>>> index b822a2c..9760c70 100644
>>>> --- a/include/linux/mmc/mmc.h
>>>> +++ b/include/linux/mmc/mmc.h
>>>> @@ -139,6 +139,7 @@ static inline bool mmc_op_multi(u32 opcode)
>>>> #define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */
>>>> #define R1_READY_FOR_DATA (1 << 8) /* sx, a */
>>>> #define R1_SWITCH_ERROR (1 << 7) /* sx, c */
>>>> +#define R1_EXCEPTION_EVENT (1 << 6) /* sx, a */
>>>> #define R1_APP_CMD (1 << 5) /* sr, c */
>>>>
>>>> #define R1_STATE_IDLE 0
>>>> @@ -274,12 +275,15 @@ struct _mmc_csd {
>>>> #define EXT_CSD_FLUSH_CACHE 32 /* W */
>>>> #define EXT_CSD_CACHE_CTRL 33 /* R/W */
>>>> #define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */
>>>> +#define EXT_CSD_EXCEPTION_STATUS 54 /* RO */
>>>> #define EXT_CSD_DATA_SECTOR_SIZE 61 /* R */
>>>> #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
>>>> #define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
>>>> #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 */
>>>> @@ -313,11 +317,13 @@ 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 */
>>>> #define EXT_CSD_TAG_UNIT_SIZE 498 /* RO */
>>>> #define EXT_CSD_DATA_TAG_SUPPORT 499 /* RO */
>>>> +#define EXT_CSD_BKOPS_SUPPORT 502 /* RO */
>>>> #define EXT_CSD_HPI_FEATURES 503 /* RO */
>>>>
>>>> /*
>>>> @@ -446,4 +452,17 @@ struct _mmc_csd {
>>>> #define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits which are 1 in value */
>>>> #define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target to value */
>>>>
>>>> +/*
>>>> + * BKOPS status level
>>>> + */
>>>> +#define EXT_CSD_BKOPS_LEVEL_2 0x2
>>>> +
>>>> +/*
>>>> + * 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)
>>>> +
>>>> #endif /* LINUX_MMC_MMC_H */
>>>> --
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>>>
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>>
>>
>>
>
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