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Date:   Mon, 2 Mar 2020 11:58:36 +0000
From:   Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To:     Zaibo Xu <xuzaibo@huawei.com>
CC:     <herbert@gondor.apana.org.au>, <davem@davemloft.net>,
        <qianweili@huawei.com>, <tanghui20@huawei.com>,
        <forest.zhouchang@huawei.com>, <linuxarm@huawei.com>,
        <zhangwei375@huawei.com>, <yekai13@huawei.com>,
        <linux-crypto@vger.kernel.org>
Subject: Re: [PATCH v2 4/5] crypto: hisilicon/sec2 - Update IV and MAC
 operation
Message-ID: <20200302115836.00004002@Huawei.com>
In-Reply-To: <1583129716-28382-5-git-send-email-xuzaibo@huawei.com>
References: <1583129716-28382-1-git-send-email-xuzaibo@huawei.com>
        <1583129716-28382-5-git-send-email-xuzaibo@huawei.com>
Organization: Huawei Technologies Research and Development (UK) Ltd.
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On Mon, 2 Mar 2020 14:15:15 +0800
Zaibo Xu <xuzaibo@huawei.com> wrote:

> From: liulongfang <liulongfang@huawei.com>
> 
> We have updated the operation method of IV and MAC address
> to prepare for pbuf patch.
> 
> Signed-off-by: liulongfang <liulongfang@huawei.com>
> Signed-off-by: Zaibo Xu <xuzaibo@huawei.com>
Trivial comment inline.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/crypto/hisilicon/sec2/sec.h        |  2 +
>  drivers/crypto/hisilicon/sec2/sec_crypto.c | 73 +++++++++++++++++-------------
>  2 files changed, 43 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/crypto/hisilicon/sec2/sec.h b/drivers/crypto/hisilicon/sec2/sec.h
> index eab0d22..e67b416 100644
> --- a/drivers/crypto/hisilicon/sec2/sec.h
> +++ b/drivers/crypto/hisilicon/sec2/sec.h
> @@ -23,6 +23,8 @@ struct sec_cipher_req {
>  	dma_addr_t c_in_dma;
>  	struct hisi_acc_hw_sgl *c_out;
>  	dma_addr_t c_out_dma;
> +	u8 *c_ivin;
> +	dma_addr_t c_ivin_dma;
>  	struct skcipher_request *sk_req;
>  	u32 c_len;
>  	bool encrypt;
> diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.c b/drivers/crypto/hisilicon/sec2/sec_crypto.c
> index acd1550..1eeaa74 100644
> --- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
> +++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
> @@ -46,6 +46,7 @@
>  #define SEC_CIPHER_AUTH		0xfe
>  #define SEC_AUTH_CIPHER		0x1
>  #define SEC_MAX_MAC_LEN		64
> +#define SEC_MAX_AAD_LEN		65535
>  #define SEC_TOTAL_MAC_SZ	(SEC_MAX_MAC_LEN * QM_Q_DEPTH)
>  #define SEC_SQE_LEN_RATE	4
>  #define SEC_SQE_CFLAG		2
> @@ -110,12 +111,12 @@ static void sec_free_req_id(struct sec_req *req)
>  	mutex_unlock(&qp_ctx->req_lock);
>  }
>  
> -static int sec_aead_verify(struct sec_req *req, struct sec_qp_ctx *qp_ctx)
> +static int sec_aead_verify(struct sec_req *req)
>  {
>  	struct aead_request *aead_req = req->aead_req.aead_req;
>  	struct crypto_aead *tfm = crypto_aead_reqtfm(aead_req);
> -	u8 *mac_out = qp_ctx->res[req->req_id].out_mac;
>  	size_t authsize = crypto_aead_authsize(tfm);
> +	u8 *mac_out = req->aead_req.out_mac;
>  	u8 *mac = mac_out + SEC_MAX_MAC_LEN;
>  	struct scatterlist *sgl = aead_req->src;
>  	size_t sz;
> @@ -163,7 +164,7 @@ static void sec_req_cb(struct hisi_qp *qp, void *resp)
>  	}
>  
>  	if (ctx->alg_type == SEC_AEAD && !req->c_req.encrypt)
> -		err = sec_aead_verify(req, qp_ctx);
> +		err = sec_aead_verify(req);
>  
>  	atomic64_inc(&ctx->sec->debug.dfx.recv_cnt);
>  
> @@ -259,11 +260,11 @@ static int sec_alg_resource_alloc(struct sec_ctx *ctx,
>  	if (ctx->alg_type == SEC_AEAD) {
>  		ret = sec_alloc_mac_resource(dev, res);
>  		if (ret)
> -			goto get_fail;
> +			goto alloc_fail;

This looks like an unrelated change. 
At very least should be mentioned as an additional cleanup in the patch intro.

>  	}
>  
>  	return 0;
> -get_fail:
> +alloc_fail:
>  	sec_free_civ_resource(dev, res);
>  
>  	return ret;
> @@ -590,11 +591,21 @@ GEN_SEC_SETKEY_FUNC(3des_cbc, SEC_CALG_3DES, SEC_CMODE_CBC)
>  GEN_SEC_SETKEY_FUNC(sm4_xts, SEC_CALG_SM4, SEC_CMODE_XTS)
>  GEN_SEC_SETKEY_FUNC(sm4_cbc, SEC_CALG_SM4, SEC_CMODE_CBC)
>  
> -static int sec_cipher_map(struct device *dev, struct sec_req *req,
> +static int sec_cipher_map(struct sec_ctx *ctx, struct sec_req *req,
>  			  struct scatterlist *src, struct scatterlist *dst)
>  {
>  	struct sec_cipher_req *c_req = &req->c_req;
> +	struct sec_aead_req *a_req = &req->aead_req;
>  	struct sec_qp_ctx *qp_ctx = req->qp_ctx;
> +	struct sec_alg_res *res = &qp_ctx->res[req->req_id];
> +	struct device *dev = SEC_CTX_DEV(ctx);
> +
> +	c_req->c_ivin = res->c_ivin;
> +	c_req->c_ivin_dma = res->c_ivin_dma;
> +	if (ctx->alg_type == SEC_AEAD) {
> +		a_req->out_mac = res->out_mac;
> +		a_req->out_mac_dma = res->out_mac_dma;
> +	}
>  
>  	c_req->c_in = hisi_acc_sg_buf_map_to_hw_sgl(dev, src,
>  						    qp_ctx->c_in_pool,
> @@ -625,29 +636,30 @@ static int sec_cipher_map(struct device *dev, struct sec_req *req,
>  	return 0;
>  }
>  
> -static void sec_cipher_unmap(struct device *dev, struct sec_cipher_req *req,
> +static void sec_cipher_unmap(struct sec_ctx *ctx, struct sec_req *req,
>  			     struct scatterlist *src, struct scatterlist *dst)
>  {
> +	struct sec_cipher_req *c_req = &req->c_req;
> +	struct device *dev = SEC_CTX_DEV(ctx);
> +
>  	if (dst != src)
> -		hisi_acc_sg_buf_unmap(dev, src, req->c_in);
> +		hisi_acc_sg_buf_unmap(dev, src, c_req->c_in);
>  
> -	hisi_acc_sg_buf_unmap(dev, dst, req->c_out);
> +	hisi_acc_sg_buf_unmap(dev, dst, c_req->c_out);
>  }
>  
>  static int sec_skcipher_sgl_map(struct sec_ctx *ctx, struct sec_req *req)
>  {
>  	struct skcipher_request *sq = req->c_req.sk_req;
>  
> -	return sec_cipher_map(SEC_CTX_DEV(ctx), req, sq->src, sq->dst);
> +	return sec_cipher_map(ctx, req, sq->src, sq->dst);
>  }
>  
>  static void sec_skcipher_sgl_unmap(struct sec_ctx *ctx, struct sec_req *req)
>  {
> -	struct device *dev = SEC_CTX_DEV(ctx);
> -	struct sec_cipher_req *c_req = &req->c_req;
> -	struct skcipher_request *sk_req = c_req->sk_req;
> +	struct skcipher_request *sq = req->c_req.sk_req;
>  
> -	sec_cipher_unmap(dev, c_req, sk_req->src, sk_req->dst);
> +	sec_cipher_unmap(ctx, req, sq->src, sq->dst);
>  }
>  
>  static int sec_aead_aes_set_key(struct sec_cipher_ctx *c_ctx,
> @@ -758,16 +770,14 @@ static int sec_aead_sgl_map(struct sec_ctx *ctx, struct sec_req *req)
>  {
>  	struct aead_request *aq = req->aead_req.aead_req;
>  
> -	return sec_cipher_map(SEC_CTX_DEV(ctx), req, aq->src, aq->dst);
> +	return sec_cipher_map(ctx, req, aq->src, aq->dst);
>  }
>  
>  static void sec_aead_sgl_unmap(struct sec_ctx *ctx, struct sec_req *req)
>  {
> -	struct device *dev = SEC_CTX_DEV(ctx);
> -	struct sec_cipher_req *cq = &req->c_req;
>  	struct aead_request *aq = req->aead_req.aead_req;
>  
> -	sec_cipher_unmap(dev, cq, aq->src, aq->dst);
> +	sec_cipher_unmap(ctx, req, aq->src, aq->dst);
>  }
>  
>  static int sec_request_transfer(struct sec_ctx *ctx, struct sec_req *req)
> @@ -800,9 +810,9 @@ static void sec_request_untransfer(struct sec_ctx *ctx, struct sec_req *req)
>  static void sec_skcipher_copy_iv(struct sec_ctx *ctx, struct sec_req *req)
>  {
>  	struct skcipher_request *sk_req = req->c_req.sk_req;
> -	u8 *c_ivin = req->qp_ctx->res[req->req_id].c_ivin;
> +	struct sec_cipher_req *c_req = &req->c_req;
>  
> -	memcpy(c_ivin, sk_req->iv, ctx->c_ctx.ivsize);
> +	memcpy(c_req->c_ivin, sk_req->iv, ctx->c_ctx.ivsize);
>  }
>  
>  static int sec_skcipher_bd_fill(struct sec_ctx *ctx, struct sec_req *req)
> @@ -817,8 +827,7 @@ static int sec_skcipher_bd_fill(struct sec_ctx *ctx, struct sec_req *req)
>  	memset(sec_sqe, 0, sizeof(struct sec_sqe));
>  
>  	sec_sqe->type2.c_key_addr = cpu_to_le64(c_ctx->c_key_dma);
> -	sec_sqe->type2.c_ivin_addr =
> -		cpu_to_le64(req->qp_ctx->res[req->req_id].c_ivin_dma);
> +	sec_sqe->type2.c_ivin_addr = cpu_to_le64(c_req->c_ivin_dma);
>  	sec_sqe->type2.data_src_addr = cpu_to_le64(c_req->c_in_dma);
>  	sec_sqe->type2.data_dst_addr = cpu_to_le64(c_req->c_out_dma);
>  
> @@ -903,9 +912,9 @@ static void sec_skcipher_callback(struct sec_ctx *ctx, struct sec_req *req,
>  static void sec_aead_copy_iv(struct sec_ctx *ctx, struct sec_req *req)
>  {
>  	struct aead_request *aead_req = req->aead_req.aead_req;
> -	u8 *c_ivin = req->qp_ctx->res[req->req_id].c_ivin;
> +	struct sec_cipher_req *c_req = &req->c_req;
>  
> -	memcpy(c_ivin, aead_req->iv, ctx->c_ctx.ivsize);
> +	memcpy(c_req->c_ivin, aead_req->iv, ctx->c_ctx.ivsize);
>  }
>  
>  static void sec_auth_bd_fill_ex(struct sec_auth_ctx *ctx, int dir,
> @@ -938,8 +947,7 @@ static void sec_auth_bd_fill_ex(struct sec_auth_ctx *ctx, int dir,
>  
>  	sec_sqe->type2.cipher_src_offset = cpu_to_le16((u16)aq->assoclen);
>  
> -	sec_sqe->type2.mac_addr =
> -		cpu_to_le64(req->qp_ctx->res[req->req_id].out_mac_dma);
> +	sec_sqe->type2.mac_addr = cpu_to_le64(a_req->out_mac_dma);
>  }
>  
>  static int sec_aead_bd_fill(struct sec_ctx *ctx, struct sec_req *req)
> @@ -963,6 +971,7 @@ static void sec_aead_callback(struct sec_ctx *c, struct sec_req *req, int err)
>  {
>  	struct aead_request *a_req = req->aead_req.aead_req;
>  	struct crypto_aead *tfm = crypto_aead_reqtfm(a_req);
> +	struct sec_aead_req *aead_req = &req->aead_req;
>  	struct sec_cipher_req *c_req = &req->c_req;
>  	size_t authsize = crypto_aead_authsize(tfm);
>  	struct sec_qp_ctx *qp_ctx = req->qp_ctx;
> @@ -978,7 +987,7 @@ static void sec_aead_callback(struct sec_ctx *c, struct sec_req *req, int err)
>  		struct scatterlist *sgl = a_req->dst;
>  
>  		sz = sg_pcopy_from_buffer(sgl, sg_nents(sgl),
> -					  qp_ctx->res[req->req_id].out_mac,
> +					  aead_req->out_mac,
>  					  authsize, a_req->cryptlen +
>  					  a_req->assoclen);
>  
> @@ -1030,6 +1039,7 @@ static int sec_request_init(struct sec_ctx *ctx, struct sec_req *req)
>  
>  static int sec_process(struct sec_ctx *ctx, struct sec_req *req)
>  {
> +	struct sec_cipher_req *c_req = &req->c_req;
>  	int ret;
>  
>  	ret = sec_request_init(ctx, req);
> @@ -1056,12 +1066,10 @@ static int sec_process(struct sec_ctx *ctx, struct sec_req *req)
>  	/* As failing, restore the IV from user */
>  	if (ctx->c_ctx.c_mode == SEC_CMODE_CBC && !req->c_req.encrypt) {
>  		if (ctx->alg_type == SEC_SKCIPHER)
> -			memcpy(req->c_req.sk_req->iv,
> -			       req->qp_ctx->res[req->req_id].c_ivin,
> +			memcpy(req->c_req.sk_req->iv, c_req->c_ivin,
>  			       ctx->c_ctx.ivsize);
>  		else
> -			memcpy(req->aead_req.aead_req->iv,
> -			       req->qp_ctx->res[req->req_id].c_ivin,
> +			memcpy(req->aead_req.aead_req->iv, c_req->c_ivin,
>  			       ctx->c_ctx.ivsize);
>  	}
>  
> @@ -1320,7 +1328,8 @@ static int sec_aead_param_check(struct sec_ctx *ctx, struct sec_req *sreq)
>  	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
>  	size_t authsize = crypto_aead_authsize(tfm);
>  
> -	if (unlikely(!req->src || !req->dst || !req->cryptlen)) {
> +	if (unlikely(!req->src || !req->dst || !req->cryptlen ||
> +		req->assoclen > SEC_MAX_AAD_LEN)) {
>  		dev_err(SEC_CTX_DEV(ctx), "aead input param error!\n");
>  		return -EINVAL;
>  	}