[PATCH v8 2/8] scsi: ufs: introduce fixup_dev_quirks vops

From: Stanley Chu <stanley.chu@mediatek.com>
To: <linux-scsi@vger.kernel.org>, <martin.petersen@oracle.com>,
	<avri.altman@wdc.com>, <alim.akhtar@samsung.com>,
	<jejb@linux.ibm.com>, <asutoshd@codeaurora.org>
Cc: <beanhuo@micron.com>, <cang@codeaurora.org>,
	<matthias.bgg@gmail.com>, <bvanassche@acm.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <kuohong.wang@mediatek.com>,
	<peter.wang@mediatek.com>, <chun-hung.wu@mediatek.com>,
	<andy.teng@mediatek.com>, Stanley Chu <stanley.chu@mediatek.com>
Subject: [PATCH v8 2/8] scsi: ufs: introduce fixup_dev_quirks vops
Date: Fri, 8 May 2020 16:01:09 +0800	[thread overview]
Message-ID: <20200508080115.24233-3-stanley.chu@mediatek.com> (raw)
In-Reply-To: <20200508080115.24233-1-stanley.chu@mediatek.com>

Some UFS deivces may have required device quirks or have non-standard
features which are enabled only on specified UFS hosts or for special
customers.

To not "pollute" common device quirk list, i.e., ufs_fixups table for
those devices mentioned above, introduce "fixup_dev_quirks" vops to
allow vendors to fix or modify device quirks accordingly.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
---
 drivers/scsi/ufs/ufshcd.c | 11 ++++++++++-
 drivers/scsi/ufs/ufshcd.h |  9 ++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index a802c5f5ec7c..8d86d9a6a622 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6838,7 +6838,7 @@ static void ufshcd_wb_probe(struct ufs_hba *hba, u8 *desc_buf)
 	hba->caps &= ~UFSHCD_CAP_WB_EN;
 }
 
-static void ufs_fixup_device_setup(struct ufs_hba *hba)
+static void ufshcd_fixup_dev_quirks(struct ufs_hba *hba)
 {
 	struct ufs_dev_fix *f;
 	struct ufs_dev_info *dev_info = &hba->dev_info;
@@ -6853,6 +6853,15 @@ static void ufs_fixup_device_setup(struct ufs_hba *hba)
 	}
 }
 
+static void ufs_fixup_device_setup(struct ufs_hba *hba)
+{
+	/* fix by general quirk table */
+	ufshcd_fixup_dev_quirks(hba);
+
+	/* allow vendors to fix quirks */
+	ufshcd_vops_fixup_dev_quirks(hba);
+}
+
 static int ufs_get_device_desc(struct ufs_hba *hba)
 {
 	int err;
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 056537e52c19..897338ba67aa 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -69,6 +69,7 @@
 #include <scsi/scsi_eh.h>
 
 #include "ufs.h"
+#include "ufs_quirks.h"
 #include "ufshci.h"
 
 #define UFSHCD "ufshcd"
@@ -336,6 +337,7 @@ struct ufs_hba_variant_ops {
 	void    (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
 					enum ufs_notify_change_status);
 	int	(*apply_dev_quirks)(struct ufs_hba *hba);
+	void	(*fixup_dev_quirks)(struct ufs_hba *hba);
 	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
 	int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
 	void	(*dbg_register_dump)(struct ufs_hba *hba);
@@ -950,7 +952,6 @@ int ufshcd_query_flag(struct ufs_hba *hba, enum query_opcode opcode,
 
 void ufshcd_auto_hibern8_enable(struct ufs_hba *hba);
 void ufshcd_auto_hibern8_update(struct ufs_hba *hba, u32 ahit);
-
 #define SD_ASCII_STD true
 #define SD_RAW false
 int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
@@ -1085,6 +1086,12 @@ static inline int ufshcd_vops_apply_dev_quirks(struct ufs_hba *hba)
 	return 0;
 }
 
+static inline void ufshcd_vops_fixup_dev_quirks(struct ufs_hba *hba)
+{
+	if (hba->vops && hba->vops->fixup_dev_quirks)
+		hba->vops->fixup_dev_quirks(hba);
+}
+
 static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum ufs_pm_op op)
 {
 	if (hba->vops && hba->vops->suspend)
-- 
2.18.0
