linux-kernel - [PATCH v3 19/20] scsi: ufs: ufs-qcom: Add support for finding max gear on new platforms

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221123074826.95369-20-manivannan.sadhasivam@linaro.org>
Date:   Wed, 23 Nov 2022 13:18:25 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     martin.petersen@...cle.com, jejb@...ux.ibm.com,
        andersson@...nel.org, vkoul@...nel.org
Cc:     quic_cang@...cinc.com, quic_asutoshd@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-phy@...ts.infradead.org, linux-scsi@...r.kernel.org,
        dmitry.baryshkov@...aro.org, ahalaney@...hat.com,
        abel.vesa@...aro.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH v3 19/20] scsi: ufs: ufs-qcom: Add support for finding max gear on new platforms

Starting from Qcom UFS version 4.0, vendor specific REG_UFS_PARAM0 register
can be used to determine the maximum gear supported by the controller.

Reviewed-by: Andrew Halaney <ahalaney@...hat.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/ufs/host/ufs-qcom.c | 2 ++
 drivers/ufs/host/ufs-qcom.h | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 3efef2f36e69..607fddb7b4c3 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -291,6 +291,8 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba)
 		 * Hence downgrade the maximum supported gear to HS-G2.
 		 */
 		return UFS_HS_G2;
+	} else if (host->hw_ver.major >= 0x4) {
+		return UFS_QCOM_MAX_GEAR(ufshcd_readl(hba, REG_UFS_PARAM0));
 	}
 
 	/* Default is HS-G3 */
diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h
index 4b00c67e9d7f..dd3abd23ec22 100644
--- a/drivers/ufs/host/ufs-qcom.h
+++ b/drivers/ufs/host/ufs-qcom.h
@@ -94,6 +94,10 @@ enum {
 #define TMRLUT_HW_CGC_EN	BIT(6)
 #define OCSC_HW_CGC_EN		BIT(7)
 
+/* bit definitions for REG_UFS_PARAM0 */
+#define MAX_HS_GEAR_MASK	GENMASK(6, 4)
+#define UFS_QCOM_MAX_GEAR(x)	FIELD_GET(MAX_HS_GEAR_MASK, (x))
+
 /* bit definition for UFS_UFS_TEST_BUS_CTRL_n */
 #define TEST_BUS_SUB_SEL_MASK	GENMASK(4, 0)  /* All XXX_SEL fields are 5 bits wide */
 
-- 
2.25.1