linux-kernel - [RFC PATCH v1 1/2] ufs: core: Advanced RPMB detection

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Date:   Mon,  7 Nov 2022 14:10:37 +0100
From:   Bean Huo <beanhuo@...pp.de>
To:     alim.akhtar@...sung.com, avri.altman@....com, jejb@...ux.ibm.com,
        martin.petersen@...cle.com, stanley.chu@...iatek.com,
        beanhuo@...ron.com, bvanassche@....org, tomas.winkler@...el.com,
        daejun7.park@...sung.com, quic_cang@...cinc.com,
        quic_nguyenb@...cinc.com, quic_xiaosenh@...cinc.com,
        quic_richardp@...cinc.com, quic_asutoshd@...cinc.com, hare@...e.de
Cc:     linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v1 1/2] ufs: core: Advanced RPMB detection

From: Bean Huo <beanhuo@...ron.com>

Check UFS Advanced RPMB LU enablement during ufshcd_lu_init().

Signed-off-by: Bean Huo <beanhuo@...ron.com>
---
 drivers/ufs/core/ufshcd.c | 4 ++++
 include/ufs/ufs.h         | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index ee73d7036133..d49e7a0b82ca 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -4940,6 +4940,10 @@ static void ufshcd_lu_init(struct ufs_hba *hba, struct scsi_device *sdev)
 	    desc_buf[UNIT_DESC_PARAM_LU_WR_PROTECT] == UFS_LU_POWER_ON_WP)
 		hba->dev_info.is_lu_power_on_wp = true;
 
+	if (desc_buf[UNIT_DESC_PARAM_UNIT_INDEX] == UFS_RPMB_UNIT &&
+	    desc_buf[UNIT_DESC_PARAM_RPMB_REGION_EN] & 1 << 4)
+			hba->dev_info.b_advanced_rpmb_en = true;
+
 	kfree(desc_buf);
 set_qdepth:
 	/*
diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h
index 1bba3fead2ce..2e617ab87750 100644
--- a/include/ufs/ufs.h
+++ b/include/ufs/ufs.h
@@ -199,6 +199,7 @@ enum unit_desc_param {
 	UNIT_DESC_PARAM_PSA_SENSITIVE		= 0x7,
 	UNIT_DESC_PARAM_MEM_TYPE		= 0x8,
 	UNIT_DESC_PARAM_DATA_RELIABILITY	= 0x9,
+	UNIT_DESC_PARAM_RPMB_REGION_EN		= 0x9,
 	UNIT_DESC_PARAM_LOGICAL_BLK_SIZE	= 0xA,
 	UNIT_DESC_PARAM_LOGICAL_BLK_COUNT	= 0xB,
 	UNIT_DESC_PARAM_ERASE_BLK_SIZE		= 0x13,
@@ -601,6 +602,8 @@ struct ufs_dev_info {
 
 	bool	b_rpm_dev_flush_capable;
 	u8	b_presrv_uspc_en;
+
+	bool    b_advanced_rpmb_en;
 };
 
 /*
-- 
2.25.1