1 files changed, 52 insertions, 43 deletions

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 9538832b03a0..7256e6c43ca6 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
+#include <linux/sched/clock.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_dbg.h>
 #include <scsi/scsi_driver.h>
@@ -265,8 +266,8 @@ static int ufshcd_setup_vreg(struct ufs_hba *hba, bool on);
 static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba,
 					 struct ufs_vreg *vreg);
 static int ufshcd_try_to_abort_task(struct ufs_hba *hba, int tag);
-static void ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set);
-static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable);
+static void ufshcd_wb_toggle_buf_flush_during_h8(struct ufs_hba *hba,
+						 bool enable);
 static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba);
 static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba);
 
@@ -286,16 +287,17 @@ static inline void ufshcd_disable_irq(struct ufs_hba *hba)
 	}
 }
 
-static inline void ufshcd_wb_config(struct ufs_hba *hba)
+static void ufshcd_configure_wb(struct ufs_hba *hba)
 {
 	if (!ufshcd_is_wb_allowed(hba))
 		return;
 
 	ufshcd_wb_toggle(hba, true);
 
-	ufshcd_wb_toggle_flush_during_h8(hba, true);
-	if (!(hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL))
-		ufshcd_wb_toggle_flush(hba, true);
+	ufshcd_wb_toggle_buf_flush_during_h8(hba, true);
+
+	if (ufshcd_is_wb_buf_flush_allowed(hba))
+		ufshcd_wb_toggle_buf_flush(hba, true);
 }
 
 static void ufshcd_scsi_unblock_requests(struct ufs_hba *hba)
@@ -457,7 +459,7 @@ static void ufshcd_print_evt(struct ufs_hba *hba, u32 id,
 		if (e->tstamp[p] == 0)
 			continue;
 		dev_err(hba->dev, "%s[%d] = 0x%x at %lld us\n", err_name, p,
-			e->val[p], ktime_to_us(e->tstamp[p]));
+			e->val[p], div_u64(e->tstamp[p], 1000));
 		found = true;
 	}
 
@@ -502,9 +504,9 @@ void ufshcd_print_trs(struct ufs_hba *hba, unsigned long bitmap, bool pr_prdt)
 		lrbp = &hba->lrb[tag];
 
 		dev_err(hba->dev, "UPIU[%d] - issue time %lld us\n",
-				tag, ktime_to_us(lrbp->issue_time_stamp));
+				tag, div_u64(lrbp->issue_time_stamp_local_clock, 1000));
 		dev_err(hba->dev, "UPIU[%d] - complete time %lld us\n",
-				tag, ktime_to_us(lrbp->compl_time_stamp));
+				tag, div_u64(lrbp->compl_time_stamp_local_clock, 1000));
 		dev_err(hba->dev,
 			"UPIU[%d] - Transfer Request Descriptor phys@0x%llx\n",
 			tag, (u64)lrbp->utrd_dma_addr);
@@ -566,10 +568,10 @@ static void ufshcd_print_host_state(struct ufs_hba *hba)
 	dev_err(hba->dev, "Clk gate=%d\n", hba->clk_gating.state);
 	dev_err(hba->dev,
 		"last_hibern8_exit_tstamp at %lld us, hibern8_exit_cnt=%d\n",
-		ktime_to_us(hba->ufs_stats.last_hibern8_exit_tstamp),
+		div_u64(hba->ufs_stats.last_hibern8_exit_tstamp, 1000),
 		hba->ufs_stats.hibern8_exit_cnt);
 	dev_err(hba->dev, "last intr at %lld us, last intr status=0x%x\n",
-		ktime_to_us(hba->ufs_stats.last_intr_ts),
+		div_u64(hba->ufs_stats.last_intr_ts, 1000),
 		hba->ufs_stats.last_intr_status);
 	dev_err(hba->dev, "error handling flags=0x%x, req. abort count=%d\n",
 		hba->eh_flags, hba->req_abort_count);
@@ -1298,9 +1300,11 @@ static int ufshcd_devfreq_scale(struct ufs_hba *hba, bool scale_up)
 	}
 
 	/* Enable Write Booster if we have scaled up else disable it */
-	downgrade_write(&hba->clk_scaling_lock);
-	is_writelock = false;
-	ufshcd_wb_toggle(hba, scale_up);
+	if (ufshcd_enable_wb_if_scaling_up(hba)) {
+		downgrade_write(&hba->clk_scaling_lock);
+		is_writelock = false;
+		ufshcd_wb_toggle(hba, scale_up);
+	}
 
 out_unprepare:
 	ufshcd_clock_scaling_unprepare(hba, is_writelock);
@@ -2140,7 +2144,9 @@ void ufshcd_send_command(struct ufs_hba *hba, unsigned int task_tag)
 	unsigned long flags;
 
 	lrbp->issue_time_stamp = ktime_get();
+	lrbp->issue_time_stamp_local_clock = local_clock();
 	lrbp->compl_time_stamp = ktime_set(0, 0);
+	lrbp->compl_time_stamp_local_clock = 0;
 	ufshcd_add_command_trace(hba, task_tag, UFS_CMD_SEND);
 	ufshcd_clk_scaling_start_busy(hba);
 	if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
@@ -4219,7 +4225,7 @@ int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
 	} else {
 		ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT,
 								POST_CHANGE);
-		hba->ufs_stats.last_hibern8_exit_tstamp = ktime_get();
+		hba->ufs_stats.last_hibern8_exit_tstamp = local_clock();
 		hba->ufs_stats.hibern8_exit_cnt++;
 	}
 
@@ -4721,7 +4727,7 @@ void ufshcd_update_evt_hist(struct ufs_hba *hba, u32 id, u32 val)
 
 	e = &hba->ufs_stats.event[id];
 	e->val[e->pos] = val;
-	e->tstamp[e->pos] = ktime_get();
+	e->tstamp[e->pos] = local_clock();
 	e->cnt += 1;
 	e->pos = (e->pos + 1) % UFS_EVENT_HIST_LENGTH;
 
@@ -5354,6 +5360,7 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba,
 	for_each_set_bit(index, &completed_reqs, hba->nutrs) {
 		lrbp = &hba->lrb[index];
 		lrbp->compl_time_stamp = ktime_get();
+		lrbp->compl_time_stamp_local_clock = local_clock();
 		cmd = lrbp->cmd;
 		if (cmd) {
 			if (unlikely(ufshcd_should_inform_monitor(hba, lrbp)))
@@ -5749,60 +5756,60 @@ int ufshcd_wb_toggle(struct ufs_hba *hba, bool enable)
 {
 	int ret;
 
-	if (!ufshcd_is_wb_allowed(hba))
-		return 0;
-
-	if (!(enable ^ hba->dev_info.wb_enabled))
+	if (!ufshcd_is_wb_allowed(hba) ||
+	    hba->dev_info.wb_enabled == enable)
 		return 0;
 
 	ret = __ufshcd_wb_toggle(hba, enable, QUERY_FLAG_IDN_WB_EN);
 	if (ret) {
-		dev_err(hba->dev, "%s Write Booster %s failed %d\n",
-			__func__, enable ? "enable" : "disable", ret);
+		dev_err(hba->dev, "%s: Write Booster %s failed %d\n",
+			__func__, enable ? "enabling" : "disabling", ret);
 		return ret;
 	}
 
 	hba->dev_info.wb_enabled = enable;
-	dev_dbg(hba->dev, "%s Write Booster %s\n",
+	dev_dbg(hba->dev, "%s: Write Booster %s\n",
 			__func__, enable ? "enabled" : "disabled");
 
 	return ret;
 }
 
-static void ufshcd_wb_toggle_flush_during_h8(struct ufs_hba *hba, bool set)
+static void ufshcd_wb_toggle_buf_flush_during_h8(struct ufs_hba *hba,
+						 bool enable)
 {
 	int ret;
 
-	ret = __ufshcd_wb_toggle(hba, set,
+	ret = __ufshcd_wb_toggle(hba, enable,
 			QUERY_FLAG_IDN_WB_BUFF_FLUSH_DURING_HIBERN8);
 	if (ret) {
-		dev_err(hba->dev, "%s: WB-Buf Flush during H8 %s failed: %d\n",
-			__func__, set ? "enable" : "disable", ret);
+		dev_err(hba->dev, "%s: WB-Buf Flush during H8 %s failed %d\n",
+			__func__, enable ? "enabling" : "disabling", ret);
 		return;
 	}
-	dev_dbg(hba->dev, "%s WB-Buf Flush during H8 %s\n",
-			__func__, set ? "enabled" : "disabled");
+	dev_dbg(hba->dev, "%s: WB-Buf Flush during H8 %s\n",
+			__func__, enable ? "enabled" : "disabled");
 }
 
-static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable)
+int ufshcd_wb_toggle_buf_flush(struct ufs_hba *hba, bool enable)
 {
 	int ret;
 
 	if (!ufshcd_is_wb_allowed(hba) ||
 	    hba->dev_info.wb_buf_flush_enabled == enable)
-		return;
+		return 0;
 
 	ret = __ufshcd_wb_toggle(hba, enable, QUERY_FLAG_IDN_WB_BUFF_FLUSH_EN);
 	if (ret) {
-		dev_err(hba->dev, "%s WB-Buf Flush %s failed %d\n", __func__,
-			enable ? "enable" : "disable", ret);
-		return;
+		dev_err(hba->dev, "%s: WB-Buf Flush %s failed %d\n",
+			__func__, enable ? "enabling" : "disabling", ret);
+		return ret;
 	}
 
 	hba->dev_info.wb_buf_flush_enabled = enable;
-
-	dev_dbg(hba->dev, "%s WB-Buf Flush %s\n",
+	dev_dbg(hba->dev, "%s: WB-Buf Flush %s\n",
 			__func__, enable ? "enabled" : "disabled");
+
+	return ret;
 }
 
 static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
@@ -5817,7 +5824,7 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 					      QUERY_ATTR_IDN_CURR_WB_BUFF_SIZE,
 					      index, 0, &cur_buf);
 	if (ret) {
-		dev_err(hba->dev, "%s dCurWriteBoosterBufferSize read failed %d\n",
+		dev_err(hba->dev, "%s: dCurWriteBoosterBufferSize read failed %d\n",
 			__func__, ret);
 		return false;
 	}
@@ -5833,10 +5840,10 @@ static bool ufshcd_wb_presrv_usrspc_keep_vcc_on(struct ufs_hba *hba,
 
 static void ufshcd_wb_force_disable(struct ufs_hba *hba)
 {
-	if (!(hba->quirks & UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL))
-		ufshcd_wb_toggle_flush(hba, false);
+	if (ufshcd_is_wb_buf_flush_allowed(hba))
+		ufshcd_wb_toggle_buf_flush(hba, false);
 
-	ufshcd_wb_toggle_flush_during_h8(hba, false);
+	ufshcd_wb_toggle_buf_flush_during_h8(hba, false);
 	ufshcd_wb_toggle(hba, false);
 	hba->caps &= ~UFSHCD_CAP_WB_EN;
 
@@ -5902,7 +5909,7 @@ static bool ufshcd_wb_need_flush(struct ufs_hba *hba)
 				      QUERY_ATTR_IDN_AVAIL_WB_BUFF_SIZE,
 				      index, 0, &avail_buf);
 	if (ret) {
-		dev_warn(hba->dev, "%s dAvailableWriteBoosterBufferSize read failed %d\n",
+		dev_warn(hba->dev, "%s: dAvailableWriteBoosterBufferSize read failed %d\n",
 			 __func__, ret);
 		return false;
 	}
@@ -6642,7 +6649,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
 
 	intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
 	hba->ufs_stats.last_intr_status = intr_status;
-	hba->ufs_stats.last_intr_ts = ktime_get();
+	hba->ufs_stats.last_intr_ts = local_clock();
 
 	/*
 	 * There could be max of hba->nutrs reqs in flight and in worst case
@@ -8233,7 +8240,9 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
 	 */
 	ufshcd_set_active_icc_lvl(hba);
 
-	ufshcd_wb_config(hba);
+	/* Enable UFS Write Booster if supported */
+	ufshcd_configure_wb(hba);
+
 	if (hba->ee_usr_mask)
 		ufshcd_write_ee_control(hba);
 	/* Enable Auto-Hibernate if configured */