Subject: [PATCH 31/36] crypto: omap - Use new AES library API

From: Eric Biggers <[email-masked]>
Date: Sun, 4 Jan 2026 21:13:04 -0800

Switch from the old AES library functions (which use struct
crypto_aes_ctx) to the new ones (which use struct aes_enckey).  This
eliminates the unnecessary computation and caching of the decryption
round keys.  The new AES en/decryption functions are also much faster
and use AES instructions when supported by the CPU.

Note: aes_encrypt_new() will be renamed to aes_encrypt() once all
callers of the old aes_encrypt() have been updated.

Signed-off-by: Eric Biggers <[email-masked]>
---
 drivers/crypto/omap-aes-gcm.c | 6 +++---
 drivers/crypto/omap-aes.h     | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/omap-aes-gcm.c b/drivers/crypto/omap-aes-gcm.c
index 1f4586509ca4..efe94a983589 100644
--- a/drivers/crypto/omap-aes-gcm.c
+++ b/drivers/crypto/omap-aes-gcm.c
@@ -175,11 +175,11 @@ static int omap_aes_gcm_copy_buffers(struct omap_aes_dev *dd,
 
 static int do_encrypt_iv(struct aead_request *req, u32 *tag, u32 *iv)
 {
 	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
 
-	aes_encrypt(&ctx->actx, (u8 *)tag, (u8 *)iv);
+	aes_encrypt_new(&ctx->akey, (u8 *)tag, (const u8 *)iv);
 	return 0;
 }
 
 void omap_aes_gcm_dma_out_callback(void *data)
 {
@@ -312,11 +312,11 @@ int omap_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
 			unsigned int keylen)
 {
 	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(tfm);
 	int ret;
 
-	ret = aes_expandkey(&ctx->actx, key, keylen);
+	ret = aes_prepareenckey(&ctx->akey, key, keylen);
 	if (ret)
 		return ret;
 
 	memcpy(ctx->octx.key, key, keylen);
 	ctx->octx.keylen = keylen;
@@ -332,11 +332,11 @@ int omap_aes_4106gcm_setkey(struct crypto_aead *tfm, const u8 *key,
 
 	if (keylen < 4)
 		return -EINVAL;
 	keylen -= 4;
 
-	ret = aes_expandkey(&ctx->actx, key, keylen);
+	ret = aes_prepareenckey(&ctx->akey, key, keylen);
 	if (ret)
 		return ret;
 
 	memcpy(ctx->octx.key, key, keylen);
 	memcpy(ctx->octx.nonce, key + keylen, 4);
diff --git a/drivers/crypto/omap-aes.h b/drivers/crypto/omap-aes.h
index 99c36a777e97..6aa70bde387a 100644
--- a/drivers/crypto/omap-aes.h
+++ b/drivers/crypto/omap-aes.h
@@ -96,11 +96,11 @@ struct omap_aes_ctx {
 	struct crypto_skcipher	*fallback;
 };
 
 struct omap_aes_gcm_ctx {
 	struct omap_aes_ctx	octx;
-	struct crypto_aes_ctx	actx;
+	struct aes_enckey	akey;
 };
 
 struct omap_aes_reqctx {
 	struct omap_aes_dev *dd;
 	unsigned long mode;
-- 
2.52.0