[PATCH v4 12/15] ufs: host: support for generate, import and prepare key

Gaurav Kashyap
2024-01-27T23:26:42Z

UFS core defines a variant ops to tie the corresponding
generate, prepare and import wrapped key blk crypto ops
to the vendor specific implementation of wrapped keys.
This patch implements these variant ops.

Signed-off-by: Gaurav Kashyap <quic_gaurkash@quicinc.com>
Reviewed-by: Om Prakash Singh <quic_omprsing@quicinc.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
---
drivers/ufs/host/ufs-qcom.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index e319176accd3..5de23ae0538c 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -189,10 +189,41 @@ static int ufs_qcom_ice_derive_sw_secret(struct ufs_hba *hba, const u8 wkey[],
return qcom_ice_derive_sw_secret(host->ice, wkey, wkey_size, sw_secret);
}

+static int ufs_qcom_ice_generate_key(struct ufs_hba *hba,
+ u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+ struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+
+ return qcom_ice_generate_key(host->ice, lt_key);
+}
+
+static int ufs_qcom_ice_prepare_key(struct ufs_hba *hba,
+ const u8 *lt_key, size_t lt_key_size,
+ u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+ struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+
+ return qcom_ice_prepare_key(host->ice, lt_key, lt_key_size,
+ eph_key);
+}
+
+static int ufs_qcom_ice_import_key(struct ufs_hba *hba,
+ const u8 *imp_key, size_t imp_key_size,
+ u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+ struct ufs_qcom_host *host = ufshcd_get_variant(hba);
+
+ return qcom_ice_import_key(host->ice, imp_key, imp_key_size,
+ lt_key);
+}
+
#else

#define ufs_qcom_ice_program_key NULL
#define ufs_qcom_ice_derive_sw_secret NULL
+#define ufs_qcom_ice_generate_key NULL
+#define ufs_qcom_ice_prepare_key NULL
+#define ufs_qcom_ice_import_key NULL

static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host)
{
@@ -1802,6 +1833,9 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.config_scaling_param = ufs_qcom_config_scaling_param,
.program_key = ufs_qcom_ice_program_key,
.derive_sw_secret = ufs_qcom_ice_derive_sw_secret,
+ .generate_key = ufs_qcom_ice_generate_key,
+ .prepare_key = ufs_qcom_ice_prepare_key,
+ .import_key = ufs_qcom_ice_import_key,
.reinit_notify = ufs_qcom_reinit_notify,
.mcq_config_resource = ufs_qcom_mcq_config_resource,
.get_hba_mac = ufs_qcom_get_hba_mac,
--
2.43.0