linux-kernel - [PATCH v2 1/4] scsi: ufs: introduce ufs_hba_variant_params to collect customizable parameters

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Message-ID: <20200509093716.21010-2-stanley.chu@mediatek.com>
Date:   Sat, 9 May 2020 17:37:13 +0800
From:   Stanley Chu <stanley.chu@...iatek.com>
To:     <linux-scsi@...r.kernel.org>, <martin.petersen@...cle.com>,
        <avri.altman@....com>, <alim.akhtar@...sung.com>,
        <jejb@...ux.ibm.com>, <asutoshd@...eaurora.org>
CC:     <beanhuo@...ron.com>, <cang@...eaurora.org>,
        <matthias.bgg@...il.com>, <bvanassche@....org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kuohong.wang@...iatek.com>,
        <peter.wang@...iatek.com>, <chun-hung.wu@...iatek.com>,
        <andy.teng@...iatek.com>, Stanley Chu <stanley.chu@...iatek.com>
Subject: [PATCH v2 1/4] scsi: ufs: introduce ufs_hba_variant_params to collect customizable parameters

There are more and more customizable parameters showed up
in UFS driver. Let's collect them into a unified place to make
the driver more clean.

Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 38 +++++++++++++++-----------------------
 drivers/scsi/ufs/ufshcd.h |  8 +++++++-
 2 files changed, 22 insertions(+), 24 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 426073a518ef..cdacbe6378a1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1353,23 +1353,6 @@ static int ufshcd_devfreq_get_dev_status(struct device *dev,
 	return 0;
 }
 
-static struct devfreq_dev_profile ufs_devfreq_profile = {
-	.polling_ms	= 100,
-	.target		= ufshcd_devfreq_target,
-	.get_dev_status	= ufshcd_devfreq_get_dev_status,
-};
-
-#if IS_ENABLED(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)
-static struct devfreq_simple_ondemand_data ufs_ondemand_data = {
-	.upthreshold = 70,
-	.downdifferential = 5,
-};
-
-static void *gov_data = &ufs_ondemand_data;
-#else
-static void *gov_data; /* NULL */
-#endif
-
 static int ufshcd_devfreq_init(struct ufs_hba *hba)
 {
 	struct list_head *clk_list = &hba->clk_list_head;
@@ -1385,12 +1368,12 @@ static int ufshcd_devfreq_init(struct ufs_hba *hba)
 	dev_pm_opp_add(hba->dev, clki->min_freq, 0);
 	dev_pm_opp_add(hba->dev, clki->max_freq, 0);
 
-	ufshcd_vops_config_scaling_param(hba, &ufs_devfreq_profile,
-					 gov_data);
+	ufshcd_vops_config_scaling_param(hba, &hba->vps->devfreq_profile,
+					 &hba->vps->ondemand_data);
 	devfreq = devfreq_add_device(hba->dev,
-			&ufs_devfreq_profile,
+			&hba->vps->devfreq_profile,
 			DEVFREQ_GOV_SIMPLE_ONDEMAND,
-			gov_data);
+			&hba->vps->ondemand_data);
 	if (IS_ERR(devfreq)) {
 		ret = PTR_ERR(devfreq);
 		dev_err(hba->dev, "Unable to register with devfreq %d\n", ret);
@@ -4314,7 +4297,7 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
 	 * instruction might be read back.
 	 * This delay can be changed based on the controller.
 	 */
-	ufshcd_delay_us(hba->hba_enable_delay_us, 100);
+	ufshcd_delay_us(hba->vps->hba_enable_delay_us, 100);
 
 	/* wait for the host controller to complete initialization */
 	retry = 50;
@@ -7477,6 +7460,15 @@ static const struct attribute_group *ufshcd_driver_groups[] = {
 	NULL,
 };
 
+static struct ufs_hba_variant_params ufs_hba_vps = {
+	.hba_enable_delay_us		= 1000,
+	.devfreq_profile.polling_ms	= 100,
+	.devfreq_profile.target		= ufshcd_devfreq_target,
+	.devfreq_profile.get_dev_status	= ufshcd_devfreq_get_dev_status,
+	.ondemand_data.upthreshold	= 70,
+	.ondemand_data.downdifferential	= 5,
+};
+
 static struct scsi_host_template ufshcd_driver_template = {
 	.module			= THIS_MODULE,
 	.name			= UFSHCD,
@@ -8724,7 +8716,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 
 	hba->mmio_base = mmio_base;
 	hba->irq = irq;
-	hba->hba_enable_delay_us = 1000;
+	hba->vps = &ufs_hba_vps;
 
 	err = ufshcd_hba_init(hba);
 	if (err)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 23a434c03c2a..f7bdf52ba8b0 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -566,6 +566,12 @@ enum ufshcd_caps {
 	UFSHCD_CAP_WB_EN				= 1 << 7,
 };
 
+struct ufs_hba_variant_params {
+	struct devfreq_dev_profile devfreq_profile;
+	struct devfreq_simple_ondemand_data ondemand_data;
+	u16 hba_enable_delay_us;
+};
+
 /**
  * struct ufs_hba - per adapter private structure
  * @mmio_base: UFSHCI base register address
@@ -663,6 +669,7 @@ struct ufs_hba {
 	int nutmrs;
 	u32 ufs_version;
 	const struct ufs_hba_variant_ops *vops;
+	struct ufs_hba_variant_params *vps;
 	void *priv;
 	unsigned int irq;
 	bool is_irq_enabled;
@@ -684,7 +691,6 @@ struct ufs_hba {
 	u32 eh_flags;
 	u32 intr_mask;
 	u16 ee_ctrl_mask;
-	u16 hba_enable_delay_us;
 	bool is_powered;
 
 	/* Work Queues */
-- 
2.18.0