[PATCH RESEND v7 14/17] ufs: core: add support for generating, importing and preparing keys

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Gaurav Kashyap <quic_gaurkash@quicinc.com>

The block layer now allows storage controllers to implement the
operations for handling wrapped keys. We can now extend the UFS core to
also support them by reaching into the block layer. Add hooks
corresponding with the existing crypto operations lower on the stack.

Tested-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Om Prakash Singh <quic_omprsing@quicinc.com>
Signed-off-by: Gaurav Kashyap <quic_gaurkash@quicinc.com>
Reviewed-by: Konrad Dybcio <konradybcio@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 drivers/ufs/core/ufshcd-crypto.c | 41 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c
index 2530239d42afa..49c0784f2432d 100644
--- a/drivers/ufs/core/ufshcd-crypto.c
+++ b/drivers/ufs/core/ufshcd-crypto.c
@@ -145,10 +145,51 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba)
 	return true;
 }
 
+static int ufshcd_crypto_generate_key(struct blk_crypto_profile *profile,
+				      u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+	struct ufs_hba *hba =
+		container_of(profile, struct ufs_hba, crypto_profile);
+
+	if (hba->vops && hba->vops->generate_key)
+		return hba->vops->generate_key(hba, lt_key);
+
+	return -EOPNOTSUPP;
+}
+
+static int ufshcd_crypto_prepare_key(struct blk_crypto_profile *profile,
+				     const u8 *lt_key, size_t lt_key_size,
+				     u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+	struct ufs_hba *hba =
+		container_of(profile, struct ufs_hba, crypto_profile);
+
+	if (hba->vops && hba->vops->prepare_key)
+		return hba->vops->prepare_key(hba, lt_key, lt_key_size, eph_key);
+
+	return -EOPNOTSUPP;
+}
+
+static int ufshcd_crypto_import_key(struct blk_crypto_profile *profile,
+				    const u8 *imp_key, size_t imp_key_size,
+				    u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE])
+{
+	struct ufs_hba *hba =
+		container_of(profile, struct ufs_hba, crypto_profile);
+
+	if (hba->vops && hba->vops->import_key)
+		return hba->vops->import_key(hba, imp_key, imp_key_size, lt_key);
+
+	return -EOPNOTSUPP;
+}
+
 static const struct blk_crypto_ll_ops ufshcd_crypto_ops = {
 	.keyslot_program	= ufshcd_crypto_keyslot_program,
 	.keyslot_evict		= ufshcd_crypto_keyslot_evict,
 	.derive_sw_secret	= ufshcd_crypto_derive_sw_secret,
+	.generate_key		= ufshcd_crypto_generate_key,
+	.prepare_key		= ufshcd_crypto_prepare_key,
+	.import_key		= ufshcd_crypto_import_key,
 };
 
 static enum blk_crypto_mode_num

-- 
2.45.2