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From:   Corentin Labbe <clabbe@baylibre.com>
To:     heiko@sntech.de, herbert@gondor.apana.org.au, krzk+dt@kernel.org,
        mturquette@baylibre.com, robh+dt@kernel.org, sboyd@kernel.org
Cc:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-clk@vger.kernel.org, linux-crypto@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org,
        Corentin Labbe <clabbe@baylibre.com>
Subject: [PATCH v3 05/26] crypto: rockchip: do not store mode globally
Date:   Mon, 21 Mar 2022 20:07:18 +0000
Message-Id: <20220321200739.3572792-6-clabbe@baylibre.com>
In-Reply-To: <20220321200739.3572792-1-clabbe@baylibre.com>
References: <20220321200739.3572792-1-clabbe@baylibre.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Storing the mode globally does not work if 2 requests are handled in the
same time.
We should store it in a request context.

Fixes: ce0183cb6464b ("crypto: rockchip - switch to skcipher API")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
 drivers/crypto/rockchip/rk3288_crypto.h       |  5 +-
 .../crypto/rockchip/rk3288_crypto_skcipher.c  | 58 ++++++++++++-------
 2 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h
index 656d6795d400..c919d9a43a08 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.h
+++ b/drivers/crypto/rockchip/rk3288_crypto.h
@@ -245,10 +245,13 @@ struct rk_ahash_rctx {
 struct rk_cipher_ctx {
 	struct rk_crypto_info		*dev;
 	unsigned int			keylen;
-	u32				mode;
 	u8				iv[AES_BLOCK_SIZE];
 };
 
+struct rk_cipher_rctx {
+	u32				mode;
+};
+
 enum alg_type {
 	ALG_TYPE_HASH,
 	ALG_TYPE_CIPHER,
diff --git a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
index 8c44a19eab75..bbd0bf52bf07 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
@@ -76,9 +76,10 @@ static int rk_aes_ecb_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_AES_ECB_MODE;
+	rctx->mode = RK_CRYPTO_AES_ECB_MODE;
 	return rk_handle_req(dev, req);
 }
 
@@ -86,9 +87,10 @@ static int rk_aes_ecb_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC;
+	rctx->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
 
@@ -96,9 +98,10 @@ static int rk_aes_cbc_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_AES_CBC_MODE;
+	rctx->mode = RK_CRYPTO_AES_CBC_MODE;
 	return rk_handle_req(dev, req);
 }
 
@@ -106,9 +109,10 @@ static int rk_aes_cbc_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC;
+	rctx->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
 
@@ -116,9 +120,10 @@ static int rk_des_ecb_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = 0;
+	rctx->mode = 0;
 	return rk_handle_req(dev, req);
 }
 
@@ -126,9 +131,10 @@ static int rk_des_ecb_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_DEC;
+	rctx->mode = RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
 
@@ -136,9 +142,10 @@ static int rk_des_cbc_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC;
+	rctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC;
 	return rk_handle_req(dev, req);
 }
 
@@ -146,9 +153,10 @@ static int rk_des_cbc_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC;
+	rctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
 
@@ -156,9 +164,10 @@ static int rk_des3_ede_ecb_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_SELECT;
+	rctx->mode = RK_CRYPTO_TDES_SELECT;
 	return rk_handle_req(dev, req);
 }
 
@@ -166,9 +175,10 @@ static int rk_des3_ede_ecb_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC;
+	rctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
 
@@ -176,9 +186,10 @@ static int rk_des3_ede_cbc_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC;
+	rctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC;
 	return rk_handle_req(dev, req);
 }
 
@@ -186,9 +197,10 @@ static int rk_des3_ede_cbc_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_crypto_info *dev = ctx->dev;
 
-	ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC |
+	rctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC |
 		    RK_CRYPTO_DEC;
 	return rk_handle_req(dev, req);
 }
@@ -199,6 +211,7 @@ static void rk_ablk_hw_init(struct rk_crypto_info *dev)
 		skcipher_request_cast(dev->async_req);
 	struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
 	struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(cipher);
 	u32 ivsize, block, conf_reg = 0;
 
@@ -206,22 +219,22 @@ static void rk_ablk_hw_init(struct rk_crypto_info *dev)
 	ivsize = crypto_skcipher_ivsize(cipher);
 
 	if (block == DES_BLOCK_SIZE) {
-		ctx->mode |= RK_CRYPTO_TDES_FIFO_MODE |
+		rctx->mode |= RK_CRYPTO_TDES_FIFO_MODE |
 			     RK_CRYPTO_TDES_BYTESWAP_KEY |
 			     RK_CRYPTO_TDES_BYTESWAP_IV;
-		CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, ctx->mode);
+		CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, rctx->mode);
 		memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, req->iv, ivsize);
 		conf_reg = RK_CRYPTO_DESSEL;
 	} else {
-		ctx->mode |= RK_CRYPTO_AES_FIFO_MODE |
+		rctx->mode |= RK_CRYPTO_AES_FIFO_MODE |
 			     RK_CRYPTO_AES_KEY_CHANGE |
 			     RK_CRYPTO_AES_BYTESWAP_KEY |
 			     RK_CRYPTO_AES_BYTESWAP_IV;
 		if (ctx->keylen == AES_KEYSIZE_192)
-			ctx->mode |= RK_CRYPTO_AES_192BIT_key;
+			rctx->mode |= RK_CRYPTO_AES_192BIT_key;
 		else if (ctx->keylen == AES_KEYSIZE_256)
-			ctx->mode |= RK_CRYPTO_AES_256BIT_key;
-		CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, ctx->mode);
+			rctx->mode |= RK_CRYPTO_AES_256BIT_key;
+		CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, rctx->mode);
 		memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, req->iv, ivsize);
 	}
 	conf_reg |= RK_CRYPTO_BYTESWAP_BTFIFO |
@@ -246,6 +259,7 @@ static int rk_set_data_start(struct rk_crypto_info *dev)
 	struct skcipher_request *req =
 		skcipher_request_cast(dev->async_req);
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 	u32 ivsize = crypto_skcipher_ivsize(tfm);
 	u8 *src_last_blk = page_address(sg_page(dev->sg_src)) +
@@ -254,7 +268,7 @@ static int rk_set_data_start(struct rk_crypto_info *dev)
 	/* Store the iv that need to be updated in chain mode.
 	 * And update the IV buffer to contain the next IV for decryption mode.
 	 */
-	if (ctx->mode & RK_CRYPTO_DEC) {
+	if (rctx->mode & RK_CRYPTO_DEC) {
 		memcpy(ctx->iv, src_last_blk, ivsize);
 		sg_pcopy_to_buffer(dev->first, dev->src_nents, req->iv,
 				   ivsize, dev->total - ivsize);
@@ -294,11 +308,12 @@ static void rk_iv_copyback(struct rk_crypto_info *dev)
 	struct skcipher_request *req =
 		skcipher_request_cast(dev->async_req);
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 	u32 ivsize = crypto_skcipher_ivsize(tfm);
 
 	/* Update the IV buffer to contain the next IV for encryption mode. */
-	if (!(ctx->mode & RK_CRYPTO_DEC)) {
+	if (!(rctx->mode & RK_CRYPTO_DEC)) {
 		if (dev->aligned) {
 			memcpy(req->iv, sg_virt(dev->sg_dst) +
 				dev->sg_dst->length - ivsize, ivsize);
@@ -314,11 +329,12 @@ static void rk_update_iv(struct rk_crypto_info *dev)
 	struct skcipher_request *req =
 		skcipher_request_cast(dev->async_req);
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
 	struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
 	u32 ivsize = crypto_skcipher_ivsize(tfm);
 	u8 *new_iv = NULL;
 
-	if (ctx->mode & RK_CRYPTO_DEC) {
+	if (rctx->mode & RK_CRYPTO_DEC) {
 		new_iv = ctx->iv;
 	} else {
 		new_iv = page_address(sg_page(dev->sg_dst)) +
-- 
2.34.1