[PATCH v7 15/17] ufs: host: add support for wrapped keys in QCom UFS

[Bartosz Golaszewski <brgl@xxxxxxxx>]

From: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx>

Use the wrapped keys capability when HWKM is supported. Whether to use
HWKM or not would be decided during an ICE probe, and based on this
information, UFS can decide to use wrapped or raw keys.

Also, propagate the appropriate key size to the ICE driver when wrapped
keys are used.

Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Reviewed-by: Om Prakash Singh <quic_omprsing@xxxxxxxxxxx>
Signed-off-by: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
 drivers/ufs/host/ufs-qcom.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 2f317a4c3edf..880df3a8955a 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -129,6 +129,8 @@ static int ufs_qcom_ice_init(struct ufs_qcom_host *host)
 
 	host->ice = ice;
 	hba->caps |= UFSHCD_CAP_CRYPTO;
+	if (qcom_ice_hwkm_supported(host->ice))
+		hba->caps |= UFSHCD_CAP_WRAPPED_CRYPTO_KEYS;
 
 	return 0;
 }
@@ -166,7 +168,11 @@ static int ufs_qcom_ice_program_key(struct ufs_hba *hba,
 	    cap.key_size != UFS_CRYPTO_KEY_SIZE_256)
 		return -EOPNOTSUPP;
 
-	ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_256;
+	if (bkey->crypto_cfg.key_type == BLK_CRYPTO_KEY_TYPE_HW_WRAPPED)
+		ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_WRAPPED;
+	else
+		ice_key_size = QCOM_ICE_CRYPTO_KEY_SIZE_256;
+
 	if (config_enable)
 		return qcom_ice_program_key(host->ice,
 					    QCOM_ICE_CRYPTO_ALG_AES_XTS,

-- 
2.43.0