From: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx>
Add a new UFS capability flag indicating that the controller supports HW
wrapped keys and use it to determine which mechanism to use in UFS core.
Tested-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
drivers/ufs/core/ufshcd-crypto.c | 24 ++++++++++++++++--------
include/ufs/ufshcd.h | 5 +++++
2 files changed, 21 insertions(+), 8 deletions(-)
diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c
index 33083e0cad6e..64389e876910 100644
--- a/drivers/ufs/core/ufshcd-crypto.c
+++ b/drivers/ufs/core/ufshcd-crypto.c
@@ -81,13 +81,15 @@ static int ufshcd_crypto_keyslot_program(struct blk_crypto_profile *profile,
cfg.crypto_cap_idx = cap_idx;
cfg.config_enable = UFS_CRYPTO_CONFIGURATION_ENABLE;
- if (ccap_array[cap_idx].algorithm_id == UFS_CRYPTO_ALG_AES_XTS) {
- /* In XTS mode, the blk_crypto_key's size is already doubled */
- memcpy(cfg.crypto_key, key->raw, key->size/2);
- memcpy(cfg.crypto_key + UFS_CRYPTO_KEY_MAX_SIZE/2,
- key->raw + key->size/2, key->size/2);
- } else {
- memcpy(cfg.crypto_key, key->raw, key->size);
+ if (key->crypto_cfg.key_type != BLK_CRYPTO_KEY_TYPE_HW_WRAPPED) {
+ if (ccap_array[cap_idx].algorithm_id == UFS_CRYPTO_ALG_AES_XTS) {
+ /* In XTS mode, the blk_crypto_key's size is already doubled */
+ memcpy(cfg.crypto_key, key->raw, key->size / 2);
+ memcpy(cfg.crypto_key + UFS_CRYPTO_KEY_MAX_SIZE / 2,
+ key->raw + key->size / 2, key->size / 2);
+ } else {
+ memcpy(cfg.crypto_key, key->raw, key->size);
+ }
}
err = ufshcd_program_key(hba, key, &cfg, slot);
@@ -196,7 +198,13 @@ int ufshcd_hba_init_crypto_capabilities(struct ufs_hba *hba)
hba->crypto_profile.ll_ops = ufshcd_crypto_ops;
/* UFS only supports 8 bytes for any DUN */
hba->crypto_profile.max_dun_bytes_supported = 8;
- hba->crypto_profile.key_types_supported = BLK_CRYPTO_KEY_TYPE_STANDARD;
+ if (hba->caps & UFSHCD_CAP_WRAPPED_CRYPTO_KEYS)
+ hba->crypto_profile.key_types_supported =
+ BLK_CRYPTO_KEY_TYPE_HW_WRAPPED;
+ else
+ hba->crypto_profile.key_types_supported =
+ BLK_CRYPTO_KEY_TYPE_STANDARD;
+
hba->crypto_profile.dev = hba->dev;
/*
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 0beb010bb8da..a2dad4f982c2 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -763,6 +763,11 @@ enum ufshcd_caps {
* WriteBooster when scaling the clock down.
*/
UFSHCD_CAP_WB_WITH_CLK_SCALING = 1 << 12,
+
+ /*
+ * UFS controller supports HW wrapped keys when using inline encryption.
+ */
+ UFSHCD_CAP_WRAPPED_CRYPTO_KEYS = 1 << 13,
};
struct ufs_hba_variant_params {
--
2.43.0
