From: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx> Extend the UFS core ops to include callbacks for generating, importing and prepating HW wrapped keys using the lower-level block crypto operations and implement them for QCom UFS. Reviewed-by: Om Prakash Singh <quic_omprsing@xxxxxxxxxxx> 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/host/ufs-qcom.c | 34 ++++++++++++++++++++++++++++++++++ include/ufs/ufshcd.h | 11 +++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 862e02bf8f64..180e13a44b36 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -195,10 +195,41 @@ 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) { @@ -1847,6 +1878,9 @@ 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, diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index c172c1dd9209..c52acb486688 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -324,6 +324,9 @@ struct ufs_pwr_mode_info { * @config_scaling_param: called to configure clock scaling parameters * @program_key: program or evict an inline encryption key * @derive_sw_secret: derive sw secret from a wrapped key + * @generate_key: generate a storage key and return longterm wrapped key + * @prepare_key: unwrap longterm key and return ephemeral wrapped key + * @import_key: import sw storage key and return longterm wrapped key * @fill_crypto_prdt: initialize crypto-related fields in the PRDT * @event_notify: called to notify important events * @reinit_notify: called to notify reinit of UFSHCD during max gear switch @@ -376,6 +379,14 @@ struct ufs_hba_variant_ops { int (*derive_sw_secret)(struct ufs_hba *hba, const u8 wkey[], unsigned int wkey_size, u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); + int (*generate_key)(struct ufs_hba *hba, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*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]); + int (*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]); int (*fill_crypto_prdt)(struct ufs_hba *hba, const struct bio_crypt_ctx *crypt_ctx, void *prdt, unsigned int num_segments); -- 2.43.0