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[90.63.244.31]) by smtp.googlemail.com with ESMTPSA id p3-20020a5d59a3000000b0020a9132d1fbsm11101003wrr.37.2022.04.25.13.21.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Apr 2022 13:21:32 -0700 (PDT) From: Corentin Labbe To: heiko@sntech.de, herbert@gondor.apana.org.au, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Corentin Labbe Subject: [PATCH v6 06/33] crypto: rockchip: add fallback for cipher Date: Mon, 25 Apr 2022 20:20:52 +0000 Message-Id: <20220425202119.3566743-7-clabbe@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220425202119.3566743-1-clabbe@baylibre.com> References: <20220425202119.3566743-1-clabbe@baylibre.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org The hardware does not handle 0 size length request, let's add a fallback. Furthermore fallback will be used for all unaligned case the hardware cannot handle. Fixes: ce0183cb6464b ("crypto: rockchip - switch to skcipher API") Signed-off-by: Corentin Labbe --- drivers/crypto/Kconfig | 4 + drivers/crypto/rockchip/rk3288_crypto.h | 2 + .../crypto/rockchip/rk3288_crypto_skcipher.c | 97 ++++++++++++++++--- 3 files changed, 90 insertions(+), 13 deletions(-) diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 7b2d138bc83e..84ab14afcbd9 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -784,6 +784,10 @@ config CRYPTO_DEV_IMGTEC_HASH config CRYPTO_DEV_ROCKCHIP tristate "Rockchip's Cryptographic Engine driver" depends on OF && ARCH_ROCKCHIP + depends on PM + select CRYPTO_ECB + select CRYPTO_CBC + select CRYPTO_DES select CRYPTO_AES select CRYPTO_LIB_DES select CRYPTO_MD5 diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h index c919d9a43a08..8b1e15d8ddc6 100644 --- a/drivers/crypto/rockchip/rk3288_crypto.h +++ b/drivers/crypto/rockchip/rk3288_crypto.h @@ -246,10 +246,12 @@ struct rk_cipher_ctx { struct rk_crypto_info *dev; unsigned int keylen; u8 iv[AES_BLOCK_SIZE]; + struct crypto_skcipher *fallback_tfm; }; struct rk_cipher_rctx { u32 mode; + struct skcipher_request fallback_req; // keep at the end }; enum alg_type { diff --git a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c index bbd0bf52bf07..eac5bba66e25 100644 --- a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c +++ b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c @@ -13,6 +13,63 @@ #define RK_CRYPTO_DEC BIT(0) +static int rk_cipher_need_fallback(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + unsigned int bs = crypto_skcipher_blocksize(tfm); + struct scatterlist *sgs, *sgd; + unsigned int stodo, dtodo, len; + + if (!req->cryptlen) + return true; + + len = req->cryptlen; + sgs = req->src; + sgd = req->dst; + while (sgs && sgd) { + if (!IS_ALIGNED(sgs->offset, sizeof(u32))) { + return true; + } + if (!IS_ALIGNED(sgd->offset, sizeof(u32))) { + return true; + } + stodo = min(len, sgs->length); + if (stodo % bs) { + return true; + } + dtodo = min(len, sgd->length); + if (dtodo % bs) { + return true; + } + if (stodo != dtodo) { + return true; + } + len -= stodo; + sgs = sg_next(sgs); + sgd = sg_next(sgd); + } + return false; +} + +static int rk_cipher_fallback(struct skcipher_request *areq) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(areq); + struct rk_cipher_ctx *op = crypto_skcipher_ctx(tfm); + struct rk_cipher_rctx *rctx = skcipher_request_ctx(areq); + int err; + + skcipher_request_set_tfm(&rctx->fallback_req, op->fallback_tfm); + skcipher_request_set_callback(&rctx->fallback_req, areq->base.flags, + areq->base.complete, areq->base.data); + skcipher_request_set_crypt(&rctx->fallback_req, areq->src, areq->dst, + areq->cryptlen, areq->iv); + if (rctx->mode & RK_CRYPTO_DEC) + err = crypto_skcipher_decrypt(&rctx->fallback_req); + else + err = crypto_skcipher_encrypt(&rctx->fallback_req); + return err; +} + static void rk_crypto_complete(struct crypto_async_request *base, int err) { if (base->complete) @@ -22,10 +79,10 @@ static void rk_crypto_complete(struct crypto_async_request *base, int err) static int rk_handle_req(struct rk_crypto_info *dev, struct skcipher_request *req) { - if (!IS_ALIGNED(req->cryptlen, dev->align_size)) - return -EINVAL; - else - return dev->enqueue(dev, &req->base); + if (rk_cipher_need_fallback(req)) + return rk_cipher_fallback(req); + + return dev->enqueue(dev, &req->base); } static int rk_aes_setkey(struct crypto_skcipher *cipher, @@ -39,7 +96,8 @@ static int rk_aes_setkey(struct crypto_skcipher *cipher, return -EINVAL; ctx->keylen = keylen; memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, key, keylen); - return 0; + + return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } static int rk_des_setkey(struct crypto_skcipher *cipher, @@ -54,7 +112,8 @@ static int rk_des_setkey(struct crypto_skcipher *cipher, ctx->keylen = keylen; memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); - return 0; + + return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } static int rk_tdes_setkey(struct crypto_skcipher *cipher, @@ -69,7 +128,7 @@ static int rk_tdes_setkey(struct crypto_skcipher *cipher, ctx->keylen = keylen; memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); - return 0; + return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } static int rk_aes_ecb_encrypt(struct skcipher_request *req) @@ -394,6 +453,7 @@ static int rk_ablk_init_tfm(struct crypto_skcipher *tfm) { struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); struct skcipher_alg *alg = crypto_skcipher_alg(tfm); + const char *name = crypto_tfm_alg_name(&tfm->base); struct rk_crypto_tmp *algt; algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher); @@ -407,6 +467,16 @@ static int rk_ablk_init_tfm(struct crypto_skcipher *tfm) if (!ctx->dev->addr_vir) return -ENOMEM; + ctx->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(ctx->fallback_tfm)) { + dev_err(ctx->dev->dev, "ERROR: Cannot allocate fallback for %s %ld\n", + name, PTR_ERR(ctx->fallback_tfm)); + return PTR_ERR(ctx->fallback_tfm); + } + + tfm->reqsize = sizeof(struct rk_cipher_rctx) + + crypto_skcipher_reqsize(ctx->fallback_tfm); + return 0; } @@ -415,6 +485,7 @@ static void rk_ablk_exit_tfm(struct crypto_skcipher *tfm) struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); free_page((unsigned long)ctx->dev->addr_vir); + crypto_free_skcipher(ctx->fallback_tfm); } struct rk_crypto_tmp rk_ecb_aes_alg = { @@ -423,7 +494,7 @@ struct rk_crypto_tmp rk_ecb_aes_alg = { .base.cra_name = "ecb(aes)", .base.cra_driver_name = "ecb-aes-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = AES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x0f, @@ -445,7 +516,7 @@ struct rk_crypto_tmp rk_cbc_aes_alg = { .base.cra_name = "cbc(aes)", .base.cra_driver_name = "cbc-aes-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = AES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x0f, @@ -468,7 +539,7 @@ struct rk_crypto_tmp rk_ecb_des_alg = { .base.cra_name = "ecb(des)", .base.cra_driver_name = "ecb-des-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = DES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x07, @@ -490,7 +561,7 @@ struct rk_crypto_tmp rk_cbc_des_alg = { .base.cra_name = "cbc(des)", .base.cra_driver_name = "cbc-des-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = DES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x07, @@ -513,7 +584,7 @@ struct rk_crypto_tmp rk_ecb_des3_ede_alg = { .base.cra_name = "ecb(des3_ede)", .base.cra_driver_name = "ecb-des3-ede-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = DES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x07, @@ -535,7 +606,7 @@ struct rk_crypto_tmp rk_cbc_des3_ede_alg = { .base.cra_name = "cbc(des3_ede)", .base.cra_driver_name = "cbc-des3-ede-rk", .base.cra_priority = 300, - .base.cra_flags = CRYPTO_ALG_ASYNC, + .base.cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK, .base.cra_blocksize = DES_BLOCK_SIZE, .base.cra_ctxsize = sizeof(struct rk_cipher_ctx), .base.cra_alignmask = 0x07,