Hi Jaehoon, > -----Original Message----- > From: Jaehoon Chung [mailto:jh80.chung@xxxxxxxxxxx] > Sent: Friday, June 15, 2012 9:50 AM > To: Subhash Jadavani > Cc: linux-mmc; Chris Ball; Kyungmin Park; Hanumath Prasad; Per FORLIN; > Sebastian Rasmussen; Dong, Chuanxiao; svenkatr@xxxxxx; Saugata Das; > Konstantin Dorfman; Adrian Hunter; Maya Erez; Ulf Hansson > Subject: Re: [PATCH v9] mmc: support BKOPS feature for eMMC > > Hi Subhash, > > On 06/13/2012 09:45 PM, Subhash Jadavani wrote: > > > Hi Jaehoon, > > > > Find few comments inline below. Also, periodic BKOPs support was present in > v8 but now you have removed it in v9. Is there any reason for it? > > Yes, there is the periodic bkops in v-8. But, i have discussed this with Konstantin > and Maya. > 1) Submit Basic BKOPS in priority work. > 2) after (1), we can add the periodic bkops. > The periodic bkops also need for eMMC's maintenance. but First, we want to > merge the basic bkops feature in mainline. > The Periodic bkops should be other patch. I am fine with having periodic BKOPS support as part of separate patch. Thanks. Regards, Subhash > > > > > Regards, > > Subhash > > > > On 6/8/2012 10:09 AM, 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. > >> 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. > >> 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> > >> Signed-off-by: Konstantin Dorfman<kdorfman@xxxxxxxxxxxxxx> > >> Signed-off-by: Maya Erez<merez@xxxxxxxxxxxxxx> > >> --- > >> 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/card/queue.c | 2 + > >> drivers/mmc/core/core.c | 161 > +++++++++++++++++++++++++++++++++++++++++++- > >> drivers/mmc/core/mmc.c | 18 +++++ > >> 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 +++++ > >> 8 files changed, 243 insertions(+), 7 deletions(-) > >> > >> diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c > >> index e360a97..e4a2cde 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_stop_bkops(mq->card); > > This is what we had discussed last time but i don't see that you are > considering error returned by mmc_stop_bkops(). Any reason for it? > > [Subhash] mmc_stop_bkops() may fail and can return an error but we are > ignoring it here. What if this function has returned error which means BKOPS > may still be running in card and if you go ahead and issue another read/write > request? > > [Jaehoon] Great..i didn't think that..I will consider this point. Thanks. > > Will do fix.. > > > > >> set_current_state(TASK_RUNNING); > >> mq->issue_fn(mq, req); > >> } else { > >> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index > >> 0b6141d..9adb004 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 peform */ > >> +#define MMC_BKOPS_MAX_TIMEOUT (4 * 80 * 1000) /* max time to > wait in ms */ > >> + > >> static struct workqueue_struct *workqueue; > >> static const unsigned freqs[] = { 400000, 300000, 200000, 100000 }; > >> > >> @@ -175,6 +181,16 @@ void mmc_request_done(struct mmc_host *host, > struct mmc_request *mrq) > >> if (mrq->done) > >> mrq->done(mrq); > >> > >> + /* > >> + * Check BKOPS urgency from each R1 response > >> + */ > >> + if (host->card&& mmc_card_mmc(host->card)&& > >> + ((mmc_resp_type(cmd) == MMC_RSP_R1) || > >> + (mmc_resp_type(cmd) == MMC_RSP_R1B))&& > >> + (cmd->resp[0]& R1_EXCEPTION_EVENT)) { > >> + mmc_card_set_check_bkops(host->card); > >> + } > >> + > >> mmc_host_clk_release(host); > >> } > >> } > >> @@ -245,6 +261,74 @@ 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 wait_for_prog_done; > >> + > >> + BUG_ON(!card); > >> + if (!card->ext_csd.bkops_en || !(card->host->caps2& > MMC_CAP2_BKOPS)) > >> + return; > >> + > >> + if (mmc_card_check_bkops(card)) { > >> + mmc_card_clr_check_bkops(card); > >> + 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 > >> + */ > >> + if (mmc_card_doing_bkops(card) || !mmc_card_need_bkops(card)) > >> + return; > >> + > >> + mmc_claim_host(card->host); > >> + if (card->ext_csd.raw_bkops_status>= EXT_CSD_BKOPS_LEVEL_2) { > >> + timeout = MMC_BKOPS_MAX_TIMEOUT; > >> + wait_for_prog_done = 1; > >> + } else { > >> + timeout = 0; > >> + wait_for_prog_done = 0; > >> + } > >> + > >> + err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, > >> + EXT_CSD_BKOPS_START, 1, timeout, wait_for_prog_done); > >> + 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) > >> + mmc_card_set_check_bkops(card); > >> + else > >> + 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); > >> @@ -359,12 +443,15 @@ struct mmc_async_req *mmc_start_req(struct > mmc_host *host, > >> if (!err&& areq) > >> start_err = __mmc_start_req(host, areq->mrq); > >> > >> - if (host->areq) > >> + if (host->areq) { > >> + if (!areq&& host->areq&& mmc_card_mmc(host->card)) > >> + mmc_start_bkops(host->card); > >> mmc_post_req(host, host->areq->mrq, 0); > >> + } > >> > >> /* Cancel a prepared request if it was not started. */ > >> if ((err || start_err)&& areq) > >> - mmc_post_req(host, areq->mrq, -EINVAL); > >> + mmc_post_req(host, areq->mrq, -EINVAL); > >> > >> if (err) > >> host->areq = NULL; > >> @@ -480,6 +567,66 @@ 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); > >> + > >> + mmc_card_clr_doing_bkops(card); > > > > Here even if mmc_interrupt_hpi() fails, you are clearing the DOING_BKOPS > flag which is not correct. Which should clear this flag if HPI issued successfully. > > If hpi command is failed, we can consider two case. > 1) bkops is already done. > 2) send_command error. > I will add the code handled them. > > > > > > > > >> + > >> + 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_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 > >> @@ -2294,8 +2441,11 @@ 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)) > >> + mmc_stop_bkops(host->card); > >> err = host->bus_ops->suspend(host); > >> + } > >> > >> if (err == -ENOSYS || !host->bus_ops->resume) { > >> /* > >> @@ -2382,6 +2532,11 @@ 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); > >> + 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 > >> 258b203..9e036e5 100644 > >> --- a/drivers/mmc/core/mmc.c > >> +++ b/drivers/mmc/core/mmc.c > >> @@ -463,6 +463,24 @@ 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_warn("%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 69370f4..f0bebd9 100644 > >> --- a/drivers/mmc/core/mmc_ops.c > >> +++ b/drivers/mmc/core/mmc_ops.c > >> @@ -367,18 +367,20 @@ 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 wait_for_prog_done) > >> + > >> { > >> int err; > >> struct mmc_command cmd = {0}; > >> @@ -392,13 +394,23 @@ 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 (wait_for_prog_done) > >> + cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B; > >> + else > >> + cmd.flags |= MMC_RSP_R1 | MMC_RSP_R1; > > > > is this typo here? did you mean 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 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); @@ -423,6 +435,13 @@ > >> 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 > >> d76513b..50b3539 100644 > >> --- a/include/linux/mmc/card.h > >> +++ b/include/linux/mmc/card.h > >> @@ -76,10 +76,13 @@ 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 */ > >> @@ -93,6 +96,7 @@ 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; > >> @@ -225,6 +229,9 @@ 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 */ > >> @@ -391,6 +398,9 @@ 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) > >> @@ -403,7 +413,13 @@ 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 1b431c7..bda3d86 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_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 *); @@ -142,6 +145,8 > >> @@ 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); > >> > >> #define MMC_ERASE_ARG 0x00000000 > >> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h > >> index 0707d22..d23caf2 100644 > >> --- a/include/linux/mmc/host.h > >> +++ b/include/linux/mmc/host.h > >> @@ -238,6 +238,8 @@ struct mmc_host { > >> #define MMC_CAP2_BROKEN_VOLTAGE (1<< 7) /* Use the broken > voltage */ > >> #define MMC_CAP2_DETECT_ON_ERR (1<< 8) /* On I/O err check > card removal */ > >> #define MMC_CAP2_HC_ERASE_SZ (1<< 9) /* High-capacity erase size > */ > >> +#define MMC_CAP2_INIT_BKOPS (1<< 10) /* To enable BKOPS */ > >> +#define MMC_CAP2_BKOPS (1<< 11) /* BKOPS supported */ > >> > >> 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 > >> d425cab..80cfbf1 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 */ > >> > >> /* > >> @@ -386,4 +392,17 @@ 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 */ > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
