mmc: support BKOPS feature for eMMC
Enable eMMC background operations (BKOPS) feature. If URGENT_BKOPS is set after a response, note that BKOPS are required. Immediately run BKOPS if required. Read/write operations should be requested during BKOPS(LEVEL-1), then issue HPI to interrupt the ongoing BKOPS and service the foreground operation. (This patch only controls the LEVEL2/3.) When repeating the writing 1GB data, at a certain time, performance is decreased. At that time, card triggers 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 do we get BKOPS_STATUS value (periodically send ext_csd command)? * If using periodic bkops, also consider runtime_pm control. Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org> Reviewed-by: Maya Erez <merez@codeaurora.org> Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Jaehoon Chung
committed by
Chris Ball
Chris Ball
parent
bec9d4e593
commit
950d56acce
@@ -76,10 +76,13 @@ struct mmc_ext_csd {
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bool hpi_en; /* HPI enablebit */
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bool hpi; /* HPI support bit */
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unsigned int hpi_cmd; /* cmd used as HPI */
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bool bkops; /* background support bit */
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bool bkops_en; /* background enable bit */
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unsigned int data_sector_size; /* 512 bytes or 4KB */
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unsigned int data_tag_unit_size; /* DATA TAG UNIT size */
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unsigned int boot_ro_lock; /* ro lock support */
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bool boot_ro_lockable;
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u8 raw_exception_status; /* 53 */
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u8 raw_partition_support; /* 160 */
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u8 raw_erased_mem_count; /* 181 */
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u8 raw_ext_csd_structure; /* 194 */
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@@ -93,6 +96,7 @@ struct mmc_ext_csd {
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u8 raw_sec_erase_mult; /* 230 */
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u8 raw_sec_feature_support;/* 231 */
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u8 raw_trim_mult; /* 232 */
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u8 raw_bkops_status; /* 246 */
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u8 raw_sectors[4]; /* 212 - 4 bytes */
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unsigned int feature_support;
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@@ -226,6 +230,7 @@ struct mmc_card {
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#define MMC_CARD_REMOVED (1<<7) /* card has been removed */
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#define MMC_STATE_HIGHSPEED_200 (1<<8) /* card is in HS200 mode */
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#define MMC_STATE_SLEEP (1<<9) /* card is in sleep state */
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#define MMC_STATE_DOING_BKOPS (1<<10) /* card is doing BKOPS */
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unsigned int quirks; /* card quirks */
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#define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes outside of the VS CCCR range */
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#define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) /* use func->cur_blksize */
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@@ -393,6 +398,7 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
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#define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
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#define mmc_card_removed(c) ((c) && ((c)->state & MMC_CARD_REMOVED))
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#define mmc_card_is_sleep(c) ((c)->state & MMC_STATE_SLEEP)
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#define mmc_card_doing_bkops(c) ((c)->state & MMC_STATE_DOING_BKOPS)
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#define mmc_card_set_present(c) ((c)->state |= MMC_STATE_PRESENT)
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#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
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@@ -405,7 +411,9 @@ static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
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#define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
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#define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
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#define mmc_card_set_sleep(c) ((c)->state |= MMC_STATE_SLEEP)
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#define mmc_card_set_doing_bkops(c) ((c)->state |= MMC_STATE_DOING_BKOPS)
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#define mmc_card_clr_doing_bkops(c) ((c)->state &= ~MMC_STATE_DOING_BKOPS)
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#define mmc_card_clr_sleep(c) ((c)->state &= ~MMC_STATE_SLEEP)
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/*
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* Quirk add/remove for MMC products.
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@@ -134,6 +134,8 @@ struct mmc_host;
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struct mmc_card;
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struct mmc_async_req;
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extern int mmc_stop_bkops(struct mmc_card *);
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extern int mmc_read_bkops_status(struct mmc_card *);
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extern struct mmc_async_req *mmc_start_req(struct mmc_host *,
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struct mmc_async_req *, int *);
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extern int mmc_interrupt_hpi(struct mmc_card *);
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@@ -142,6 +144,8 @@ extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
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extern int mmc_app_cmd(struct mmc_host *, struct mmc_card *);
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extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
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struct mmc_command *, int);
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extern void mmc_start_bkops(struct mmc_card *card, bool from_exception);
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extern int __mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int, bool);
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extern int mmc_switch(struct mmc_card *, u8, u8, u8, unsigned int);
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#define MMC_ERASE_ARG 0x00000000
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@@ -139,6 +139,7 @@ static inline bool mmc_op_multi(u32 opcode)
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#define R1_CURRENT_STATE(x) ((x & 0x00001E00) >> 9) /* sx, b (4 bits) */
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#define R1_READY_FOR_DATA (1 << 8) /* sx, a */
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#define R1_SWITCH_ERROR (1 << 7) /* sx, c */
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#define R1_EXCEPTION_EVENT (1 << 6) /* sx, a */
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#define R1_APP_CMD (1 << 5) /* sr, c */
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#define R1_STATE_IDLE 0
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@@ -274,12 +275,15 @@ struct _mmc_csd {
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#define EXT_CSD_FLUSH_CACHE 32 /* W */
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#define EXT_CSD_CACHE_CTRL 33 /* R/W */
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#define EXT_CSD_POWER_OFF_NOTIFICATION 34 /* R/W */
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#define EXT_CSD_EXP_EVENTS_STATUS 54 /* RO */
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#define EXT_CSD_DATA_SECTOR_SIZE 61 /* R */
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#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
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#define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */
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#define EXT_CSD_PARTITION_SUPPORT 160 /* RO */
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#define EXT_CSD_HPI_MGMT 161 /* R/W */
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#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */
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#define EXT_CSD_BKOPS_EN 163 /* R/W */
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#define EXT_CSD_BKOPS_START 164 /* W */
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#define EXT_CSD_SANITIZE_START 165 /* W */
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#define EXT_CSD_WR_REL_PARAM 166 /* RO */
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#define EXT_CSD_BOOT_WP 173 /* R/W */
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@@ -313,11 +317,13 @@ struct _mmc_csd {
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#define EXT_CSD_PWR_CL_200_360 237 /* RO */
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#define EXT_CSD_PWR_CL_DDR_52_195 238 /* RO */
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#define EXT_CSD_PWR_CL_DDR_52_360 239 /* RO */
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#define EXT_CSD_BKOPS_STATUS 246 /* RO */
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#define EXT_CSD_POWER_OFF_LONG_TIME 247 /* RO */
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#define EXT_CSD_GENERIC_CMD6_TIME 248 /* RO */
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#define EXT_CSD_CACHE_SIZE 249 /* RO, 4 bytes */
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#define EXT_CSD_TAG_UNIT_SIZE 498 /* RO */
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#define EXT_CSD_DATA_TAG_SUPPORT 499 /* RO */
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#define EXT_CSD_BKOPS_SUPPORT 502 /* RO */
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#define EXT_CSD_HPI_FEATURES 503 /* RO */
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/*
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@@ -377,6 +383,19 @@ struct _mmc_csd {
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#define EXT_CSD_PWR_CL_4BIT_MASK 0x0F /* 8 bit PWR CLS */
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#define EXT_CSD_PWR_CL_8BIT_SHIFT 4
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#define EXT_CSD_PWR_CL_4BIT_SHIFT 0
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/*
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* EXCEPTION_EVENT_STATUS field
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*/
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#define EXT_CSD_URGENT_BKOPS BIT(0)
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#define EXT_CSD_DYNCAP_NEEDED BIT(1)
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#define EXT_CSD_SYSPOOL_EXHAUSTED BIT(2)
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#define EXT_CSD_PACKED_FAILURE BIT(3)
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/*
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* BKOPS status level
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*/
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#define EXT_CSD_BKOPS_LEVEL_2 0x2
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/*
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* MMC_SWITCH access modes
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*/
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