0021-scsi-ufs-sysfs-Add-urgent-flush-level-entry-RW.patch

From 89b50312c957f73a7c2f618e44897a8d07d5c078 Mon Sep 17 00:00:00 2001
From: Avri Altman <avri.altman@wdc.com>
Date: Sat, 6 Apr 2019 13:16:15 +0300
Subject: [PATCH 21/25] scsi: ufs-sysfs: Add urgent flush level entry (RW)

Change-Id: Ic7473a62a3a6171d40d6d8d490b02337bc9046fd
Signed-off-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufs-sysfs.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index dd17df0..60f339a 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -231,6 +231,40 @@ static ssize_t turbo_write_urgent_flush_ref_show(struct device *dev,
 	return sprintf(buf, "%d\n", atomic_read(&hba->tw_urgent_flush_ref));
 }
 
+static ssize_t turbo_write_urgent_flush_lvl_show(struct device *dev,
+						 struct device_attribute *attr,
+						 char *buf)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+
+	if (!ufshcd_is_tw_supported(hba))
+		return -EOPNOTSUPP;
+
+	return sprintf(buf,"%d\n", hba->tw_urgent_flush_lvl);
+}
+
+static ssize_t
+turbo_write_urgent_flush_lvl_store(struct device *dev,
+				   struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+	unsigned int lvl;
+
+	if (!ufshcd_is_tw_supported(hba))
+		return -EOPNOTSUPP;
+
+	if (kstrtouint(buf, 0, &lvl))
+		return -EINVAL;
+
+	if (lvl > UFS_TW_BUFFER_LVL_MAX)
+		return -EINVAL;
+
+	hba->tw_urgent_flush_lvl = lvl;
+
+	return count;
+}
+
 static DEVICE_ATTR_RW(rpm_lvl);
 static DEVICE_ATTR_RO(rpm_target_dev_state);
 static DEVICE_ATTR_RO(rpm_target_link_state);
@@ -241,6 +275,7 @@ static DEVICE_ATTR_RW(turbo_write_do_enable);
 static DEVICE_ATTR_RW(turbo_write_do_flush);
 static DEVICE_ATTR_RW(turbo_write_do_hibern8_flush);
 static DEVICE_ATTR_RO(turbo_write_urgent_flush_ref);
+static DEVICE_ATTR_RW(turbo_write_urgent_flush_lvl);
 
 static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
 	&dev_attr_rpm_lvl.attr,
@@ -253,6 +288,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
 	&dev_attr_turbo_write_do_flush.attr,
 	&dev_attr_turbo_write_do_hibern8_flush.attr,
 	&dev_attr_turbo_write_urgent_flush_ref.attr,
+	&dev_attr_turbo_write_urgent_flush_lvl.attr,
 	NULL
 };
 
-- 
2.7.4