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Subject: Re: [PATCH 2/2] crypto: hisilicon/zip - remove zlib and gzip
To:     Yang Shen <shenyang39@huawei.com>, <herbert@gondor.apana.org.au>,
        <davem@davemloft.net>
CC:     <linux-kernel@vger.kernel.org>, <linux-crypto@vger.kernel.org>,
        <wangzhou1@hisilicon.com>
References: <20230914090908.3849318-1-shenyang39@huawei.com>
 <20230914090908.3849318-3-shenyang39@huawei.com>
From:   liulongfang <liulongfang@huawei.com>
Message-ID: <d40b6209-8059-4dc9-7e9a-05cd51817afd@huawei.com>
Date:   Fri, 15 Sep 2023 14:53:34 +0800
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On 2023/9/14 17:09, Yang Shen wrote:
> Remove the support of zlib-deflate and gzip.
> 
> Signed-off-by: Yang Shen <shenyang39@huawei.com>
> ---
>  drivers/crypto/hisilicon/zip/zip_crypto.c | 308 ++--------------------
>  drivers/crypto/hisilicon/zip/zip_main.c   |   2 +-
>  2 files changed, 22 insertions(+), 288 deletions(-)
> 
> diff --git a/drivers/crypto/hisilicon/zip/zip_crypto.c b/drivers/crypto/hisilicon/zip/zip_crypto.c
> index 09f60f786779..636ac794ebb7 100644
> --- a/drivers/crypto/hisilicon/zip/zip_crypto.c
> +++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
> @@ -17,38 +17,14 @@
>  /* hisi_zip_sqe dw9 */
>  #define HZIP_REQ_TYPE_M				GENMASK(7, 0)
>  #define HZIP_ALG_TYPE_DEFLATE			0x01
> -#define HZIP_ALG_TYPE_ZLIB			0x02
> -#define HZIP_ALG_TYPE_GZIP			0x03
>  #define HZIP_BUF_TYPE_M				GENMASK(11, 8)
> -#define HZIP_PBUFFER				0x0
>  #define HZIP_SGL				0x1
>  
> -#define HZIP_ZLIB_HEAD_SIZE			2
> -#define HZIP_GZIP_HEAD_SIZE			10
> -
> -#define GZIP_HEAD_FHCRC_BIT			BIT(1)
> -#define GZIP_HEAD_FEXTRA_BIT			BIT(2)
> -#define GZIP_HEAD_FNAME_BIT			BIT(3)
> -#define GZIP_HEAD_FCOMMENT_BIT			BIT(4)
> -
> -#define GZIP_HEAD_FLG_SHIFT			3
> -#define GZIP_HEAD_FEXTRA_SHIFT			10
> -#define GZIP_HEAD_FEXTRA_XLEN			2UL
> -#define GZIP_HEAD_FHCRC_SIZE			2
> -
> -#define HZIP_GZIP_HEAD_BUF			256
>  #define HZIP_ALG_PRIORITY			300
>  #define HZIP_SGL_SGE_NR				10
>  
> -#define HZIP_ALG_ZLIB				GENMASK(1, 0)
> -#define HZIP_ALG_GZIP				GENMASK(3, 2)
>  #define HZIP_ALG_DEFLATE			GENMASK(5, 4)
>  
> -static const u8 zlib_head[HZIP_ZLIB_HEAD_SIZE] = {0x78, 0x9c};
> -static const u8 gzip_head[HZIP_GZIP_HEAD_SIZE] = {
> -	0x1f, 0x8b, 0x08, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x03
> -};
> -
>  enum hisi_zip_alg_type {
>  	HZIP_ALG_TYPE_COMP = 0,
>  	HZIP_ALG_TYPE_DECOMP = 1,
> @@ -61,22 +37,10 @@ enum {
>  };
>  
>  #define COMP_NAME_TO_TYPE(alg_name)					\
> -	(!strcmp((alg_name), "deflate") ? HZIP_ALG_TYPE_DEFLATE :	\
> -	(!strcmp((alg_name), "zlib-deflate") ? HZIP_ALG_TYPE_ZLIB :	\
> -	 !strcmp((alg_name), "gzip") ? HZIP_ALG_TYPE_GZIP : 0))		\
> -
> -#define TO_HEAD_SIZE(req_type)						\
> -	(((req_type) == HZIP_ALG_TYPE_ZLIB) ? sizeof(zlib_head) :	\
> -	 ((req_type) == HZIP_ALG_TYPE_GZIP) ? sizeof(gzip_head) : 0)	\
> -
> -#define TO_HEAD(req_type)						\
> -	(((req_type) == HZIP_ALG_TYPE_ZLIB) ? zlib_head :		\
> -	 ((req_type) == HZIP_ALG_TYPE_GZIP) ? gzip_head : NULL)		\
> +	(!strcmp((alg_name), "deflate") ? HZIP_ALG_TYPE_DEFLATE : 0)
>  
>  struct hisi_zip_req {
>  	struct acomp_req *req;
> -	u32 sskip;
> -	u32 dskip;
>  	struct hisi_acc_hw_sgl *hw_src;
>  	struct hisi_acc_hw_sgl *hw_dst;
>  	dma_addr_t dma_src;
> @@ -141,85 +105,8 @@ static u16 sgl_sge_nr = HZIP_SGL_SGE_NR;
>  module_param_cb(sgl_sge_nr, &sgl_sge_nr_ops, &sgl_sge_nr, 0444);
>  MODULE_PARM_DESC(sgl_sge_nr, "Number of sge in sgl(1-255)");
>  
> -static u32 get_extra_field_size(const u8 *start)
> -{
> -	return *((u16 *)start) + GZIP_HEAD_FEXTRA_XLEN;
> -}
> -
> -static u32 get_name_field_size(const u8 *start)
> -{
> -	return strlen(start) + 1;
> -}
> -
> -static u32 get_comment_field_size(const u8 *start)
> -{
> -	return strlen(start) + 1;
> -}
> -
> -static u32 __get_gzip_head_size(const u8 *src)
> -{
> -	u8 head_flg = *(src + GZIP_HEAD_FLG_SHIFT);
> -	u32 size = GZIP_HEAD_FEXTRA_SHIFT;
> -
> -	if (head_flg & GZIP_HEAD_FEXTRA_BIT)
> -		size += get_extra_field_size(src + size);
> -	if (head_flg & GZIP_HEAD_FNAME_BIT)
> -		size += get_name_field_size(src + size);
> -	if (head_flg & GZIP_HEAD_FCOMMENT_BIT)
> -		size += get_comment_field_size(src + size);
> -	if (head_flg & GZIP_HEAD_FHCRC_BIT)
> -		size += GZIP_HEAD_FHCRC_SIZE;
> -
> -	return size;
> -}
> -
> -static u32 __maybe_unused get_gzip_head_size(struct scatterlist *sgl)
> -{
> -	char buf[HZIP_GZIP_HEAD_BUF];
> -
> -	sg_copy_to_buffer(sgl, sg_nents(sgl), buf, sizeof(buf));
> -
> -	return __get_gzip_head_size(buf);
> -}
> -
> -static int add_comp_head(struct scatterlist *dst, u8 req_type)
> -{
> -	int head_size = TO_HEAD_SIZE(req_type);
> -	const u8 *head = TO_HEAD(req_type);
> -	int ret;
> -
> -	ret = sg_copy_from_buffer(dst, sg_nents(dst), head, head_size);
> -	if (unlikely(ret != head_size)) {
> -		pr_err("the head size of buffer is wrong (%d)!\n", ret);
> -		return -ENOMEM;
> -	}
> -
> -	return head_size;
> -}
> -
> -static int get_comp_head_size(struct acomp_req *acomp_req, u8 req_type)
> -{
> -	if (unlikely(!acomp_req->src || !acomp_req->slen))
> -		return -EINVAL;
> -
> -	if (unlikely(req_type == HZIP_ALG_TYPE_GZIP &&
> -		     acomp_req->slen < GZIP_HEAD_FEXTRA_SHIFT))
> -		return -EINVAL;
> -
> -	switch (req_type) {
> -	case HZIP_ALG_TYPE_ZLIB:
> -		return TO_HEAD_SIZE(HZIP_ALG_TYPE_ZLIB);
> -	case HZIP_ALG_TYPE_GZIP:
> -		return TO_HEAD_SIZE(HZIP_ALG_TYPE_GZIP);
> -	default:
> -		pr_err("request type does not support!\n");
> -		return -EINVAL;
> -	}
> -}
> -
> -static struct hisi_zip_req *hisi_zip_create_req(struct acomp_req *req,
> -						struct hisi_zip_qp_ctx *qp_ctx,
> -						size_t head_size, bool is_comp)
> +static struct hisi_zip_req *hisi_zip_create_req(struct hisi_zip_qp_ctx *qp_ctx,
> +						struct acomp_req *req)
>  {
>  	struct hisi_zip_req_q *req_q = &qp_ctx->req_q;
>  	struct hisi_zip_req *q = req_q->q;
> @@ -242,14 +129,6 @@ static struct hisi_zip_req *hisi_zip_create_req(struct acomp_req *req,
>  	req_cache->req_id = req_id;
>  	req_cache->req = req;
>  
> -	if (is_comp) {
> -		req_cache->sskip = 0;
> -		req_cache->dskip = head_size;
> -	} else {
> -		req_cache->sskip = head_size;
> -		req_cache->dskip = 0;
> -	}
> -
>  	return req_cache;
>  }
>  
> @@ -275,10 +154,8 @@ static void hisi_zip_fill_buf_size(struct hisi_zip_sqe *sqe, struct hisi_zip_req
>  {
>  	struct acomp_req *a_req = req->req;
>  
> -	sqe->input_data_length = a_req->slen - req->sskip;
> -	sqe->dest_avail_out = a_req->dlen - req->dskip;
> -	sqe->dw7 = FIELD_PREP(HZIP_IN_SGE_DATA_OFFSET_M, req->sskip);
> -	sqe->dw8 = FIELD_PREP(HZIP_OUT_SGE_DATA_OFFSET_M, req->dskip);
> +	sqe->input_data_length = a_req->slen;
> +	sqe->dest_avail_out = a_req->dlen;
>  }
>  
>  static void hisi_zip_fill_buf_type(struct hisi_zip_sqe *sqe, u8 buf_type)
> @@ -299,12 +176,7 @@ static void hisi_zip_fill_req_type(struct hisi_zip_sqe *sqe, u8 req_type)
>  	sqe->dw9 = val;
>  }
>  
> -static void hisi_zip_fill_tag_v1(struct hisi_zip_sqe *sqe, struct hisi_zip_req *req)
> -{
> -	sqe->dw13 = req->req_id;
> -}
> -
> -static void hisi_zip_fill_tag_v2(struct hisi_zip_sqe *sqe, struct hisi_zip_req *req)
> +static void hisi_zip_fill_tag(struct hisi_zip_sqe *sqe, struct hisi_zip_req *req)
>  {
>  	sqe->dw26 = req->req_id;
>  }
> @@ -333,8 +205,8 @@ static void hisi_zip_fill_sqe(struct hisi_zip_ctx *ctx, struct hisi_zip_sqe *sqe
>  	ops->fill_sqe_type(sqe, ops->sqe_type);
>  }
>  
> -static int hisi_zip_do_work(struct hisi_zip_req *req,
> -			    struct hisi_zip_qp_ctx *qp_ctx)
> +static int hisi_zip_do_work(struct hisi_zip_qp_ctx *qp_ctx,
> +			    struct hisi_zip_req *req)
>  {
>  	struct hisi_acc_sgl_pool *pool = qp_ctx->sgl_pool;
>  	struct hisi_zip_dfx *dfx = &qp_ctx->zip_dev->dfx;
> @@ -386,12 +258,7 @@ static int hisi_zip_do_work(struct hisi_zip_req *req,
>  	return ret;
>  }
>  
> -static u32 hisi_zip_get_tag_v1(struct hisi_zip_sqe *sqe)
> -{
> -	return sqe->dw13;
> -}
> -
> -static u32 hisi_zip_get_tag_v2(struct hisi_zip_sqe *sqe)
> +static u32 hisi_zip_get_tag(struct hisi_zip_sqe *sqe)
>  {
>  	return sqe->dw26;
>  }
> @@ -417,8 +284,8 @@ static void hisi_zip_acomp_cb(struct hisi_qp *qp, void *data)
>  	u32 tag = ops->get_tag(sqe);
>  	struct hisi_zip_req *req = req_q->q + tag;
>  	struct acomp_req *acomp_req = req->req;
> -	u32 status, dlen, head_size;
>  	int err = 0;
> +	u32 status;
>  
>  	atomic64_inc(&dfx->recv_cnt);
>  	status = ops->get_status(sqe);
> @@ -430,13 +297,10 @@ static void hisi_zip_acomp_cb(struct hisi_qp *qp, void *data)
>  		err = -EIO;
>  	}
>  
> -	dlen = ops->get_dstlen(sqe);
> -
>  	hisi_acc_sg_buf_unmap(dev, acomp_req->src, req->hw_src);
>  	hisi_acc_sg_buf_unmap(dev, acomp_req->dst, req->hw_dst);
>  
> -	head_size = (qp->alg_type == 0) ? TO_HEAD_SIZE(qp->req_type) : 0;
> -	acomp_req->dlen = dlen + head_size;
> +	acomp_req->dlen = ops->get_dstlen(sqe);
>  
>  	if (acomp_req->base.complete)
>  		acomp_request_complete(acomp_req, err);
> @@ -450,24 +314,13 @@ static int hisi_zip_acompress(struct acomp_req *acomp_req)
>  	struct hisi_zip_qp_ctx *qp_ctx = &ctx->qp_ctx[HZIP_QPC_COMP];
>  	struct device *dev = &qp_ctx->qp->qm->pdev->dev;
>  	struct hisi_zip_req *req;
> -	int head_size = 0;
>  	int ret;
>  
> -	/* let's output compression head now */
> -	if (qp_ctx->qp->req_type != HZIP_ALG_TYPE_DEFLATE) {
> -		head_size = add_comp_head(acomp_req->dst, qp_ctx->qp->req_type);
> -		if (unlikely(head_size < 0)) {
> -			dev_err_ratelimited(dev, "failed to add comp head (%d)!\n",
> -					head_size);
> -			return head_size;
> -		}
> -	}
> -
> -	req = hisi_zip_create_req(acomp_req, qp_ctx, head_size, true);
> +	req = hisi_zip_create_req(qp_ctx, acomp_req);
>  	if (IS_ERR(req))
>  		return PTR_ERR(req);
>  
> -	ret = hisi_zip_do_work(req, qp_ctx);
> +	ret = hisi_zip_do_work(qp_ctx, req);
>  	if (unlikely(ret != -EINPROGRESS)) {
>  		dev_info_ratelimited(dev, "failed to do compress (%d)!\n", ret);
>  		hisi_zip_remove_req(qp_ctx, req);
> @@ -482,22 +335,13 @@ static int hisi_zip_adecompress(struct acomp_req *acomp_req)
>  	struct hisi_zip_qp_ctx *qp_ctx = &ctx->qp_ctx[HZIP_QPC_DECOMP];
>  	struct device *dev = &qp_ctx->qp->qm->pdev->dev;
>  	struct hisi_zip_req *req;
> -	int head_size = 0, ret;
> -
> -	if (qp_ctx->qp->req_type != HZIP_ALG_TYPE_DEFLATE) {
> -		head_size = get_comp_head_size(acomp_req, qp_ctx->qp->req_type);
> -		if (unlikely(head_size < 0)) {
> -			dev_err_ratelimited(dev, "failed to get comp head size (%d)!\n",
> -					head_size);
> -			return head_size;
> -		}
> -	}
> +	int ret;
>  
> -	req = hisi_zip_create_req(acomp_req, qp_ctx, head_size, false);
> +	req = hisi_zip_create_req(qp_ctx, acomp_req);
>  	if (IS_ERR(req))
>  		return PTR_ERR(req);
>  
> -	ret = hisi_zip_do_work(req, qp_ctx);
> +	ret = hisi_zip_do_work(qp_ctx, req);
>  	if (unlikely(ret != -EINPROGRESS)) {
>  		dev_info_ratelimited(dev, "failed to do decompress (%d)!\n",
>  				     ret);
> @@ -534,28 +378,15 @@ static void hisi_zip_release_qp(struct hisi_zip_qp_ctx *qp_ctx)
>  	hisi_qm_free_qps(&qp_ctx->qp, 1);
>  }
>  
> -static const struct hisi_zip_sqe_ops hisi_zip_ops_v1 = {
> -	.sqe_type		= 0,
> -	.fill_addr		= hisi_zip_fill_addr,
> -	.fill_buf_size		= hisi_zip_fill_buf_size,
> -	.fill_buf_type		= hisi_zip_fill_buf_type,
> -	.fill_req_type		= hisi_zip_fill_req_type,
> -	.fill_tag		= hisi_zip_fill_tag_v1,
> -	.fill_sqe_type		= hisi_zip_fill_sqe_type,
> -	.get_tag		= hisi_zip_get_tag_v1,
> -	.get_status		= hisi_zip_get_status,
> -	.get_dstlen		= hisi_zip_get_dstlen,
> -};
> -
> -static const struct hisi_zip_sqe_ops hisi_zip_ops_v2 = {
> +static const struct hisi_zip_sqe_ops hisi_zip_ops = {
>  	.sqe_type		= 0x3,
>  	.fill_addr		= hisi_zip_fill_addr,
>  	.fill_buf_size		= hisi_zip_fill_buf_size,
>  	.fill_buf_type		= hisi_zip_fill_buf_type,
>  	.fill_req_type		= hisi_zip_fill_req_type,
> -	.fill_tag		= hisi_zip_fill_tag_v2,
> +	.fill_tag		= hisi_zip_fill_tag,
>  	.fill_sqe_type		= hisi_zip_fill_sqe_type,
> -	.get_tag		= hisi_zip_get_tag_v2,
> +	.get_tag		= hisi_zip_get_tag,
>  	.get_status		= hisi_zip_get_status,
>  	.get_dstlen		= hisi_zip_get_dstlen,
>  };
> @@ -591,10 +422,7 @@ static int hisi_zip_ctx_init(struct hisi_zip_ctx *hisi_zip_ctx, u8 req_type, int
>  		qp_ctx->zip_dev = hisi_zip;
>  	}
>  
> -	if (hisi_zip->qm.ver < QM_HW_V3)
> -		hisi_zip_ctx->ops = &hisi_zip_ops_v1;
> -	else
> -		hisi_zip_ctx->ops = &hisi_zip_ops_v2;
> +	hisi_zip_ctx->ops = &hisi_zip_ops;
>  
>  	return 0;
>  }
> @@ -788,106 +616,12 @@ static void hisi_zip_unregister_deflate(struct hisi_qm *qm)
>  	crypto_unregister_acomp(&hisi_zip_acomp_deflate);
>  }
>  
> -static struct acomp_alg hisi_zip_acomp_zlib = {
> -	.init			= hisi_zip_acomp_init,
> -	.exit			= hisi_zip_acomp_exit,
> -	.compress		= hisi_zip_acompress,
> -	.decompress		= hisi_zip_adecompress,
> -	.base			= {
> -		.cra_name		= "zlib-deflate",
> -		.cra_driver_name	= "hisi-zlib-acomp",
> -		.cra_module		= THIS_MODULE,
> -		.cra_priority           = HZIP_ALG_PRIORITY,
> -		.cra_ctxsize		= sizeof(struct hisi_zip_ctx),
> -	}
> -};
> -
> -static int hisi_zip_register_zlib(struct hisi_qm *qm)
> -{
> -	int ret;
> -
> -	if (!hisi_zip_alg_support(qm, HZIP_ALG_ZLIB))
> -		return 0;
> -
> -	ret = crypto_register_acomp(&hisi_zip_acomp_zlib);
> -	if (ret)
> -		dev_err(&qm->pdev->dev, "failed to register to zlib (%d)!\n", ret);
> -
> -	return ret;
> -}
> -
> -static void hisi_zip_unregister_zlib(struct hisi_qm *qm)
> -{
> -	if (!hisi_zip_alg_support(qm, HZIP_ALG_ZLIB))
> -		return;
> -
> -	crypto_unregister_acomp(&hisi_zip_acomp_zlib);
> -}
> -
> -static struct acomp_alg hisi_zip_acomp_gzip = {
> -	.init			= hisi_zip_acomp_init,
> -	.exit			= hisi_zip_acomp_exit,
> -	.compress		= hisi_zip_acompress,
> -	.decompress		= hisi_zip_adecompress,
> -	.base			= {
> -		.cra_name		= "gzip",
> -		.cra_driver_name	= "hisi-gzip-acomp",
> -		.cra_module		= THIS_MODULE,
> -		.cra_priority           = HZIP_ALG_PRIORITY,
> -		.cra_ctxsize		= sizeof(struct hisi_zip_ctx),
> -	}
> -};
> -
> -static int hisi_zip_register_gzip(struct hisi_qm *qm)
> -{
> -	int ret;
> -
> -	if (!hisi_zip_alg_support(qm, HZIP_ALG_GZIP))
> -		return 0;
> -
> -	ret = crypto_register_acomp(&hisi_zip_acomp_gzip);
> -	if (ret)
> -		dev_err(&qm->pdev->dev, "failed to register to gzip (%d)!\n", ret);
> -
> -	return ret;
> -}
> -
> -static void hisi_zip_unregister_gzip(struct hisi_qm *qm)
> -{
> -	if (!hisi_zip_alg_support(qm, HZIP_ALG_GZIP))
> -		return;
> -
> -	crypto_unregister_acomp(&hisi_zip_acomp_gzip);
> -}
> -
>  int hisi_zip_register_to_crypto(struct hisi_qm *qm)
>  {
> -	int ret = 0;
> -
> -	ret = hisi_zip_register_deflate(qm);
> -	if (ret)
> -		return ret;
> -
> -	ret = hisi_zip_register_zlib(qm);
> -	if (ret)
> -		goto err_unreg_deflate;
> -
> -	ret = hisi_zip_register_gzip(qm);
> -	if (ret)
> -		goto err_unreg_zlib;
> -
> -	return 0;
> -
> -err_unreg_zlib:
> -	hisi_zip_unregister_zlib(qm);
> -err_unreg_deflate:
> -	hisi_zip_unregister_deflate(qm);
> -	return ret;
> +	return hisi_zip_register_deflate(qm);
>  }
>  
>  void hisi_zip_unregister_from_crypto(struct hisi_qm *qm)
>  {
>  	hisi_zip_unregister_deflate(qm);
> -	hisi_zip_unregister_zlib(qm);
> -	hisi_zip_unregister_gzip(qm);
>  }
> diff --git a/drivers/crypto/hisilicon/zip/zip_main.c b/drivers/crypto/hisilicon/zip/zip_main.c
> index da7a23c0e594..0d5d1ee363e4 100644
> --- a/drivers/crypto/hisilicon/zip/zip_main.c
> +++ b/drivers/crypto/hisilicon/zip/zip_main.c
> @@ -236,7 +236,7 @@ static struct hisi_qm_cap_info zip_basic_cap_info[] = {
>  	{ZIP_CLUSTER_DECOMP_NUM_CAP, 0x313C, 0, GENMASK(7, 0), 0x6, 0x6, 0x3},
>  	{ZIP_DECOMP_ENABLE_BITMAP, 0x3140, 16, GENMASK(15, 0), 0xFC, 0xFC, 0x1C},
>  	{ZIP_COMP_ENABLE_BITMAP, 0x3140, 0, GENMASK(15, 0), 0x3, 0x3, 0x3},
> -	{ZIP_DRV_ALG_BITMAP, 0x3144, 0, GENMASK(31, 0), 0xF, 0xF, 0x3F},
> +	{ZIP_DRV_ALG_BITMAP, 0x3144, 0, GENMASK(31, 0), 0x0, 0x0, 0x30},
>  	{ZIP_DEV_ALG_BITMAP, 0x3148, 0, GENMASK(31, 0), 0xF, 0xF, 0x3F},
>  	{ZIP_CORE1_ALG_BITMAP, 0x314C, 0, GENMASK(31, 0), 0x5, 0x5, 0xD5},
>  	{ZIP_CORE2_ALG_BITMAP, 0x3150, 0, GENMASK(31, 0), 0x5, 0x5, 0xD5},
> 
Reviewed-by: Longfang Liu <liulongfang@huawei.com>

Thanks.
Longfang.