ANDROID: ufshcd-crypto: export cap find API

Export symbol ufshcd_crypto_cap_find to find
the crypto capabilities from the crypto engine
in the storage controller. This is used to
validate that the crypto_mode and data_unit_size
provided is supported by the inline encryption
hardware. This can be used by all vops.

Bug: 147209885

Change-Id: I1020f88a35664dd1a3829750ba805ea76c93dc89
Signed-off-by: Barani Muthukumaran <bmuthuku@codeaurora.org>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Satya Tangirala <satyat@google.com>

drivers/scsi/ufs/ufshcd-crypto.c

@@ -37,9 +37,9 @@ static size_t get_keysize_bytes(enum ufs_crypto_key_size size)
 	}
 }
 
-static int ufshcd_crypto_cap_find(struct ufs_hba *hba,
-				  enum blk_crypto_mode_num crypto_mode,
-				  unsigned int data_unit_size)
+int ufshcd_crypto_cap_find(struct ufs_hba *hba,
+			   enum blk_crypto_mode_num crypto_mode,
+			   unsigned int data_unit_size)
 {
 	enum ufs_crypto_alg ufs_alg;
 	u8 data_unit_mask;
@@ -71,6 +71,7 @@ static int ufshcd_crypto_cap_find(struct ufs_hba *hba,
 
 	return -EINVAL;
 }
+EXPORT_SYMBOL(ufshcd_crypto_cap_find);
 
 /**
  * ufshcd_crypto_cfg_entry_write_key - Write a key into a crypto_cfg_entry

drivers/scsi/ufs/ufshcd-crypto.h

@@ -36,6 +36,10 @@ static inline bool ufshcd_is_crypto_enabled(struct ufs_hba *hba)
 }
 
 /* Functions implementing UFSHCI v2.1 specification behaviour */
+int ufshcd_crypto_cap_find(struct ufs_hba *hba,
+			   enum blk_crypto_mode_num crypto_mode,
+			   unsigned int data_unit_size);
+
 int ufshcd_prepare_lrbp_crypto_spec(struct ufs_hba *hba,
 				    struct scsi_cmnd *cmd,
 				    struct ufshcd_lrb *lrbp);