Add inline encryption support to ufs-mediatek.
The standards-compliant parts, such as querying the crypto capabilities
and enabling crypto for individual UFS requests, are already handled by
ufshcd-crypto.c, which itself is wired into the blk-crypto framework.
However MediaTek UFS host requires a vendor-specific hce_enable operation
to allow crypto-related registers being accessed normally in kernel.
After this step, MediaTek UFS host can work as standard-compliant host
for inline-encryption related functions.
Signed-off-by: Stanley Chu <stanley....@mediatek.com>
---
drivers/scsi/ufs/ufs-mediatek.c | 22 ++++++++++++++++++++++
drivers/scsi/ufs/ufs-mediatek.h | 1 +
2 files changed, 23 insertions(+)
diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index ad929235c193..31af8b3d2b53 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -16,6 +16,7 @@
#include <linux/soc/mediatek/mtk_sip_svc.h>
#include "ufshcd.h"
+#include "ufshcd-crypto.h"
#include "ufshcd-pltfrm.h"
#include "ufs_quirks.h"
#include "unipro.h"
@@ -25,6 +26,9 @@
arm_smccc_smc(MTK_SIP_UFS_CONTROL, \
cmd, val, 0, 0, 0, 0, 0, &(res))
+#define ufs_mtk_crypto_ctrl(res, enable) \
+ ufs_mtk_smc(UFS_MTK_SIP_CRYPTO_CTRL, enable, res)
+
#define ufs_mtk_ref_clk_notify(on, res) \
ufs_mtk_smc(UFS_MTK_SIP_REF_CLK_NOTIFICATION, on, res)
@@ -73,6 +77,18 @@ static void ufs_mtk_cfg_unipro_cg(struct ufs_hba *hba, bool
enable)
}
}
+static void ufs_mtk_crypto_enable(struct ufs_hba *hba)
+{
+ struct arm_smccc_res res;
+
+ ufs_mtk_crypto_ctrl(res, 1);
+ if (res.a0) {
+ dev_info(hba->dev, "%s: crypto enable failed, err: %lu\n",
+ __func__, res.a0);
+ hba->caps &= ~UFSHCD_CAP_CRYPTO;
+ }
+}
+
static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
@@ -83,6 +99,9 @@ static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
hba->vps->hba_enable_delay_us = 0;
else
hba->vps->hba_enable_delay_us = 600;
+
+ if (hba->caps & UFSHCD_CAP_CRYPTO)
+ ufs_mtk_crypto_enable(hba);
}
return 0;
@@ -317,6 +336,9 @@ static int ufs_mtk_init(struct ufs_hba *hba)
/* Enable clock-gating */
hba->caps |= UFSHCD_CAP_CLK_GATING;
+ /* Enable inline encryption */
+ hba->caps |= UFSHCD_CAP_CRYPTO;
+
/* Enable WriteBooster */
hba->caps |= UFSHCD_CAP_WB_EN;
hba->vps->wb_flush_threshold = UFS_WB_BUF_REMAIN_PERCENT(80);
diff --git a/drivers/scsi/ufs/ufs-mediatek.h b/drivers/scsi/ufs/ufs-mediatek.h
index 6052ec105aba..8ed24d5fcff9 100644
--- a/drivers/scsi/ufs/ufs-mediatek.h
+++ b/drivers/scsi/ufs/ufs-mediatek.h
@@ -70,6 +70,7 @@ enum {
*/
#define MTK_SIP_UFS_CONTROL MTK_SIP_SMC_CMD(0x276)
#define UFS_MTK_SIP_DEVICE_RESET BIT(1)
+#define UFS_MTK_SIP_CRYPTO_CTRL BIT(2)
#define UFS_MTK_SIP_REF_CLK_NOTIFICATION BIT(3)
/*
--
2.18.0
