Do background operations if need

index 217f820..de9ffd3 100644
@@ -284,6 +284,15 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 	else
 		arg = MMC_ERASE_ARG;
 
+	/*
+	 * Before issuing a user req, host driver should
+	 * wait for the BKOPS is done or just use HPI to
+	 * interrupt it.
+	 */
+	err = mmc_wait_for_bkops(card);
+	if (err)
+		goto out;
+
 	err = mmc_erase(card, from, nr, arg);
 out:
 	spin_lock_irq(&md->lock);

@@ -318,6 +327,15 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
 	else
 		arg = MMC_SECURE_ERASE_ARG;
 
+	/*
+	 * Before issuing a user req, host driver should
+	 * wait for the BKOPS is done or just use HPI to
+	 * interrupt it.
+	 */
+	err = mmc_wait_for_bkops(card);
+	if (err)
+		goto out;
+
 	err = mmc_erase(card, from, nr, arg);
 	if (!err && arg == MMC_SECURE_TRIM1_ARG)
 		err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);

@@ -422,6 +440,15 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 
 		mmc_queue_bounce_pre(mq);
 
+		/*
+		 * Before issuing a user req, host driver should
+		 * wait for the BKOPS is done or just use HPI to
+		 * interrupt it.
+		 */
+		ret = mmc_wait_for_bkops(card);
+		if (ret)
+			goto cmd_err;
+
 		mmc_wait_for_req(card->host, &brq.mrq);
 
 		mmc_queue_bounce_post(mq);

@@ -513,6 +540,13 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		}
 
 		/*
+		 * Check if need to do bkops by each R1 response command
+		 */
+		if (mmc_card_mmc(card) &&
+				(brq.cmd.resp[0] & R1_URGENT_BKOPS))
+			mmc_card_set_need_bkops(card);
+
+		/*
 		 * A block was successfully transferred.
 		 */
 		spin_lock_irq(&md->lock);

index 4e42d03..9d2c0b4 100644
@@ -65,6 +65,7 @@ static int mmc_queue_thread(void *d)
 				set_current_state(TASK_RUNNING);
 				break;
 			}
+			mmc_start_do_bkops(mq->card);
 			up(&mq->thread_sem);
 			schedule();
 			down(&mq->thread_sem);

213 lines not on this page · raw message

index 026c975..368216b 100644
@@ -53,6 +53,7 @@ static inline void mmc_delay(unsigned int ms)
 	}
 }
 
+void mmc_bkops_scan(struct work_struct *work);
 void mmc_rescan(struct work_struct *work);
 void mmc_start_host(struct mmc_host *host);
 void mmc_stop_host(struct mmc_host *host);

index 92e3370..bd520c6 100644
@@ -288,6 +288,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 	init_waitqueue_head(&host->wq);
 	INIT_DELAYED_WORK(&host->detect, mmc_rescan);
 	INIT_DELAYED_WORK_DEFERRABLE(&host->disable, mmc_host_deeper_disable);
+	INIT_DELAYED_WORK(&host->bkops_scan, mmc_bkops_scan);
 #ifdef CONFIG_PM
 	host->pm_notify.notifier_call = mmc_pm_notify;
 #endif

index 9b755cb..4142ab5 100644
@@ -56,6 +56,7 @@ struct mmc_ext_csd {
 	unsigned int		trim_timeout;		/* In milliseconds */
 	unsigned int		bkops:1; /* background support bit */
 	unsigned int		bkops_en:1; /* background enable bit */
+	unsigned int		hpi_en:1; /* HPI enable bit */
 };
 
 struct sd_scr {

@@ -117,6 +118,8 @@ struct mmc_card {
 #define MMC_STATE_HIGHSPEED	(1<<2)		/* card is in high speed mode */
 #define MMC_STATE_BLOCKADDR	(1<<3)		/* card uses block-addressing */
 #define MMC_STATE_HIGHSPEED_DDR (1<<4)		/* card is in high speed mode */
+#define MMC_STATE_NEED_BKOPS	(1<<5) /* card need to do BKOPS */
+#define MMC_STATE_DOING_BKOPS	(1<<6) /* card is doing 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 */

@@ -159,12 +162,19 @@ struct mmc_card {
 #define mmc_card_highspeed(c)	((c)->state & MMC_STATE_HIGHSPEED)
 #define mmc_card_blockaddr(c)	((c)->state & MMC_STATE_BLOCKADDR)
 #define mmc_card_ddr_mode(c)	((c)->state & MMC_STATE_HIGHSPEED_DDR)
+#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_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
 #define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
 #define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
 #define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
 #define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR)
+#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_clr_need_bkops(c)	((c)->state &= ~MMC_STATE_NEED_BKOPS)
+#define mmc_card_clr_doing_bkops(c)	((c)->state &= ~MMC_STATE_DOING_BKOPS)
 
 static inline int mmc_card_lenient_fn0(const struct mmc_card *c)
 {

index 64e013f..0011d49 100644
@@ -131,6 +131,7 @@ struct mmc_request {
 struct mmc_host;
 struct mmc_card;
 
+extern int mmc_wait_for_bkops(struct mmc_card *);
 extern void mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,

@@ -153,6 +154,8 @@ 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_do_bkops(struct mmc_card *card);
+
 extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen);
 
 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *);

index 381c77f..b3f50da 100644
@@ -212,6 +212,8 @@ struct mmc_host {
 	unsigned int		disable_delay;	/* disable delay in msecs */
 	struct delayed_work	disable;	/* disabling work */
 
+	struct delayed_work	bkops_scan;	/* detect the BKOPS status */
+
 	struct mmc_card		*card;		/* device attached to this host */
 
 	wait_queue_head_t	wq;

index 14f7813..ef85e90 100644
@@ -129,6 +129,7 @@
 #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_URGENT_BKOPS		(1 << 6) /* sx, a */
 #define R1_APP_CMD		(1 << 5)	/* sr, c */
 
 /*