From 015b8e121082671f14cf2912df9afbfd139575b4 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 30 Nov 2023 18:12:55 +0800
Subject: [PATCH] crypto: starfive - Remove cfb and ofb

Remove the unused CFB/OFB implementation.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/starfive/jh7110-aes.c  | 71 +--------------------------
 drivers/crypto/starfive/jh7110-cryp.h |  2 -
 2 files changed, 1 insertion(+), 72 deletions(-)

diff --git a/drivers/crypto/starfive/jh7110-aes.c b/drivers/crypto/starfive/jh7110-aes.c
index e0fe599f8192..1ac15cc4ef3c 100644
--- a/drivers/crypto/starfive/jh7110-aes.c
+++ b/drivers/crypto/starfive/jh7110-aes.c
@@ -262,12 +262,7 @@ static int starfive_aes_hw_init(struct starfive_cryp_ctx *ctx)
 	rctx->csr.aes.mode  = hw_mode;
 	rctx->csr.aes.cmode = !is_encrypt(cryp);
 	rctx->csr.aes.ie = 1;
-
-	if (hw_mode == STARFIVE_AES_MODE_CFB ||
-	    hw_mode == STARFIVE_AES_MODE_OFB)
-		rctx->csr.aes.stmode = STARFIVE_AES_MODE_XFB_128;
-	else
-		rctx->csr.aes.stmode = STARFIVE_AES_MODE_XFB_1;
+	rctx->csr.aes.stmode = STARFIVE_AES_MODE_XFB_1;
 
 	if (cryp->side_chan) {
 		rctx->csr.aes.delay_aes = 1;
@@ -294,8 +289,6 @@ static int starfive_aes_hw_init(struct starfive_cryp_ctx *ctx)
 		starfive_aes_ccm_init(ctx);
 		starfive_aes_aead_hw_start(ctx, hw_mode);
 		break;
-	case STARFIVE_AES_MODE_OFB:
-	case STARFIVE_AES_MODE_CFB:
 	case STARFIVE_AES_MODE_CBC:
 	case STARFIVE_AES_MODE_CTR:
 		starfive_aes_write_iv(ctx, (void *)cryp->req.sreq->iv);
@@ -785,26 +778,6 @@ static int starfive_aes_cbc_decrypt(struct skcipher_request *req)
 	return starfive_aes_crypt(req, STARFIVE_AES_MODE_CBC);
 }
 
-static int starfive_aes_cfb_encrypt(struct skcipher_request *req)
-{
-	return starfive_aes_crypt(req, STARFIVE_AES_MODE_CFB | FLG_ENCRYPT);
-}
-
-static int starfive_aes_cfb_decrypt(struct skcipher_request *req)
-{
-	return starfive_aes_crypt(req, STARFIVE_AES_MODE_CFB);
-}
-
-static int starfive_aes_ofb_encrypt(struct skcipher_request *req)
-{
-	return starfive_aes_crypt(req, STARFIVE_AES_MODE_OFB | FLG_ENCRYPT);
-}
-
-static int starfive_aes_ofb_decrypt(struct skcipher_request *req)
-{
-	return starfive_aes_crypt(req, STARFIVE_AES_MODE_OFB);
-}
-
 static int starfive_aes_ctr_encrypt(struct skcipher_request *req)
 {
 	return starfive_aes_crypt(req, STARFIVE_AES_MODE_CTR | FLG_ENCRYPT);
@@ -910,48 +883,6 @@ static struct skcipher_engine_alg skcipher_algs[] = {
 	.op = {
 		.do_one_request = starfive_aes_do_one_req,
 	},
-}, {
-	.base.init			= starfive_aes_init_tfm,
-	.base.setkey			= starfive_aes_setkey,
-	.base.encrypt			= starfive_aes_cfb_encrypt,
-	.base.decrypt			= starfive_aes_cfb_decrypt,
-	.base.min_keysize		= AES_MIN_KEY_SIZE,
-	.base.max_keysize		= AES_MAX_KEY_SIZE,
-	.base.ivsize			= AES_BLOCK_SIZE,
-	.base.base = {
-		.cra_name		= "cfb(aes)",
-		.cra_driver_name	= "starfive-cfb-aes",
-		.cra_priority		= 200,
-		.cra_flags		= CRYPTO_ALG_ASYNC,
-		.cra_blocksize		= 1,
-		.cra_ctxsize		= sizeof(struct starfive_cryp_ctx),
-		.cra_alignmask		= 0xf,
-		.cra_module		= THIS_MODULE,
-	},
-	.op = {
-		.do_one_request = starfive_aes_do_one_req,
-	},
-}, {
-	.base.init			= starfive_aes_init_tfm,
-	.base.setkey			= starfive_aes_setkey,
-	.base.encrypt			= starfive_aes_ofb_encrypt,
-	.base.decrypt			= starfive_aes_ofb_decrypt,
-	.base.min_keysize		= AES_MIN_KEY_SIZE,
-	.base.max_keysize		= AES_MAX_KEY_SIZE,
-	.base.ivsize			= AES_BLOCK_SIZE,
-	.base.base = {
-		.cra_name		= "ofb(aes)",
-		.cra_driver_name	= "starfive-ofb-aes",
-		.cra_priority		= 200,
-		.cra_flags		= CRYPTO_ALG_ASYNC,
-		.cra_blocksize		= 1,
-		.cra_ctxsize		= sizeof(struct starfive_cryp_ctx),
-		.cra_alignmask		= 0xf,
-		.cra_module		= THIS_MODULE,
-	},
-	.op = {
-		.do_one_request = starfive_aes_do_one_req,
-	},
 },
 };
 
diff --git a/drivers/crypto/starfive/jh7110-cryp.h b/drivers/crypto/starfive/jh7110-cryp.h
index 8510f8c1f307..6cdf6db5d904 100644
--- a/drivers/crypto/starfive/jh7110-cryp.h
+++ b/drivers/crypto/starfive/jh7110-cryp.h
@@ -50,8 +50,6 @@ union starfive_aes_csr {
 		u32 ccm_start			:1;
 #define STARFIVE_AES_MODE_ECB			0x0
 #define STARFIVE_AES_MODE_CBC			0x1
-#define STARFIVE_AES_MODE_CFB			0x2
-#define STARFIVE_AES_MODE_OFB			0x3
 #define STARFIVE_AES_MODE_CTR			0x4
 #define STARFIVE_AES_MODE_CCM			0x5
 #define STARFIVE_AES_MODE_GCM			0x6