crypto: qce - switch to skcipher API

Commit 7a7ffe65 ("crypto: skcipher - Add top-level skcipher interface")
dated 20 august 2015 introduced the new skcipher API which is supposed to
replace both blkcipher and ablkcipher. While all consumers of the API have
been converted long ago, some producers of the ablkcipher remain, forcing
us to keep the ablkcipher support routines alive, along with the matching
code to expose [a]blkciphers via the skcipher API.

So switch this driver to the skcipher API, allowing us to finally drop the
ablkcipher code in the near future.
Reviewed-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qce/Makefile

@@ -4,4 +4,4 @@ qcrypto-objs := core.o \
 		common.o \
 		dma.o \
 		sha.o \
-		ablkcipher.o
+		skcipher.o

drivers/crypto/qce/cipher.h

@@ -45,12 +45,12 @@ struct qce_cipher_reqctx {
 	unsigned int cryptlen;
 };
 
-static inline struct qce_alg_template *to_cipher_tmpl(struct crypto_tfm *tfm)
+static inline struct qce_alg_template *to_cipher_tmpl(struct crypto_skcipher *tfm)
 {
-	struct crypto_alg *alg = tfm->__crt_alg;
-	return container_of(alg, struct qce_alg_template, alg.crypto);
+	struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+	return container_of(alg, struct qce_alg_template, alg.skcipher);
 }
 
-extern const struct qce_algo_ops ablkcipher_ops;
+extern const struct qce_algo_ops skcipher_ops;
 
 #endif /* _CIPHER_H_ */

drivers/crypto/qce/common.c

@@ -304,13 +304,13 @@ static int qce_setup_regs_ahash(struct crypto_async_request *async_req,
 	return 0;
 }
 
-static int qce_setup_regs_ablkcipher(struct crypto_async_request *async_req,
+static int qce_setup_regs_skcipher(struct crypto_async_request *async_req,
 				     u32 totallen, u32 offset)
 {
-	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
-	struct qce_cipher_reqctx *rctx = ablkcipher_request_ctx(req);
+	struct skcipher_request *req = skcipher_request_cast(async_req);
+	struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
 	struct qce_cipher_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
-	struct qce_alg_template *tmpl = to_cipher_tmpl(async_req->tfm);
+	struct qce_alg_template *tmpl = to_cipher_tmpl(crypto_skcipher_reqtfm(req));
 	struct qce_device *qce = tmpl->qce;
 	__be32 enckey[QCE_MAX_CIPHER_KEY_SIZE / sizeof(__be32)] = {0};
 	__be32 enciv[QCE_MAX_IV_SIZE / sizeof(__be32)] = {0};
@@ -389,8 +389,8 @@ int qce_start(struct crypto_async_request *async_req, u32 type, u32 totallen,
 	      u32 offset)
 {
 	switch (type) {
-	case CRYPTO_ALG_TYPE_ABLKCIPHER:
-		return qce_setup_regs_ablkcipher(async_req, totallen, offset);
+	case CRYPTO_ALG_TYPE_SKCIPHER:
+		return qce_setup_regs_skcipher(async_req, totallen, offset);
 	case CRYPTO_ALG_TYPE_AHASH:
 		return qce_setup_regs_ahash(async_req, totallen, offset);
 	default:

drivers/crypto/qce/common.h

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <crypto/aes.h>
 #include <crypto/hash.h>
+#include <crypto/internal/skcipher.h>
 
 /* key size in bytes */
 #define QCE_SHA_HMAC_KEY_SIZE		64
@@ -79,7 +80,7 @@ struct qce_alg_template {
 	unsigned long alg_flags;
 	const u32 *std_iv;
 	union {
-		struct crypto_alg crypto;
+		struct skcipher_alg skcipher;
 		struct ahash_alg ahash;
 	} alg;
 	struct qce_device *qce;

drivers/crypto/qce/core.c

@@ -22,7 +22,7 @@
 #define QCE_QUEUE_LENGTH	1
 
 static const struct qce_algo_ops *qce_ops[] = {
-	&ablkcipher_ops,
+	&skcipher_ops,
 	&ahash_ops,
 };