Received-SPF: softfail (google.com: domain of transitioning linux-crypto-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
From:   Giovanni Cabiddu <giovanni.cabiddu@intel.com>
To:     herbert@gondor.apana.org.au
Cc:     linux-crypto@vger.kernel.org, qat-linux@intel.com,
        vdronov@redhat.com, Giovanni Cabiddu <giovanni.cabiddu@intel.com>,
        stable@vger.kernel.org, Adam Guerin <adam.guerin@intel.com>,
        Wojciech Ziemba <wojciech.ziemba@intel.com>
Subject: [PATCH v2 10/11] crypto: qat - honor CRYPTO_TFM_REQ_MAY_SLEEP flag
Date:   Fri,  6 May 2022 15:39:02 +0100
Message-Id: <20220506143903.31776-11-giovanni.cabiddu@intel.com>
In-Reply-To: <20220506143903.31776-1-giovanni.cabiddu@intel.com>
References: <20220506143903.31776-1-giovanni.cabiddu@intel.com>
MIME-Version: 1.0
Organization: Intel Research and Development Ireland Ltd - Co. Reg. #308263 - Collinstown Industrial Park, Leixlip, County Kildare - Ireland
Content-Transfer-Encoding: 8bit
Precedence: bulk

If a request has the flag CRYPTO_TFM_REQ_MAY_SLEEP set, allocate memory
using the flag GFP_KERNEL otherwise use GFP_ATOMIC.

Cc: stable@vger.kernel.org
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Adam Guerin <adam.guerin@intel.com>
Reviewed-by: Wojciech Ziemba <wojciech.ziemba@intel.com>
---
 drivers/crypto/qat/qat_common/qat_algs.c      | 19 ++++++++++++-------
 drivers/crypto/qat/qat_common/qat_asym_algs.c | 17 ++++++++++-------
 drivers/crypto/qat/qat_common/qat_crypto.h    |  5 +++++
 3 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index 873533dc43a7..148edbe379e3 100644
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -703,7 +703,8 @@ static void qat_alg_free_bufl(struct qat_crypto_instance *inst,
 static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
 			       struct scatterlist *sgl,
 			       struct scatterlist *sglout,
-			       struct qat_crypto_request *qat_req)
+			       struct qat_crypto_request *qat_req,
+			       gfp_t flags)
 {
 	struct device *dev = &GET_DEV(inst->accel_dev);
 	int i, sg_nctr = 0;
@@ -723,7 +724,7 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
 	qat_req->buf.sgl_dst_valid = false;
 
 	if (n > QAT_MAX_BUFF_DESC) {
-		bufl = kzalloc_node(sz, GFP_ATOMIC, node);
+		bufl = kzalloc_node(sz, flags, node);
 		if (unlikely(!bufl))
 			return -ENOMEM;
 	} else {
@@ -765,7 +766,7 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
 		sg_nctr = 0;
 
 		if (n > QAT_MAX_BUFF_DESC) {
-			buflout = kzalloc_node(sz_out, GFP_ATOMIC, node);
+			buflout = kzalloc_node(sz_out, flags, node);
 			if (unlikely(!buflout))
 				goto err_in;
 		} else {
@@ -966,6 +967,7 @@ static int qat_alg_aead_dec(struct aead_request *areq)
 	struct icp_qat_fw_la_auth_req_params *auth_param;
 	struct icp_qat_fw_la_bulk_req *msg;
 	int digst_size = crypto_aead_authsize(aead_tfm);
+	gfp_t f = qat_algs_alloc_flags(&areq->base);
 	int ret;
 	u32 cipher_len;
 
@@ -973,7 +975,7 @@ static int qat_alg_aead_dec(struct aead_request *areq)
 	if (cipher_len % AES_BLOCK_SIZE != 0)
 		return -EINVAL;
 
-	ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
+	ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req, f);
 	if (unlikely(ret))
 		return ret;
 
@@ -1008,6 +1010,7 @@ static int qat_alg_aead_enc(struct aead_request *areq)
 	struct qat_crypto_request *qat_req = aead_request_ctx(areq);
 	struct icp_qat_fw_la_cipher_req_params *cipher_param;
 	struct icp_qat_fw_la_auth_req_params *auth_param;
+	gfp_t f = qat_algs_alloc_flags(&areq->base);
 	struct icp_qat_fw_la_bulk_req *msg;
 	u8 *iv = areq->iv;
 	int ret;
@@ -1015,7 +1018,7 @@ static int qat_alg_aead_enc(struct aead_request *areq)
 	if (areq->cryptlen % AES_BLOCK_SIZE != 0)
 		return -EINVAL;
 
-	ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
+	ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req, f);
 	if (unlikely(ret))
 		return ret;
 
@@ -1193,13 +1196,14 @@ static int qat_alg_skcipher_encrypt(struct skcipher_request *req)
 	struct qat_alg_skcipher_ctx *ctx = crypto_tfm_ctx(tfm);
 	struct qat_crypto_request *qat_req = skcipher_request_ctx(req);
 	struct icp_qat_fw_la_cipher_req_params *cipher_param;
+	gfp_t f = qat_algs_alloc_flags(&req->base);
 	struct icp_qat_fw_la_bulk_req *msg;
 	int ret;
 
 	if (req->cryptlen == 0)
 		return 0;
 
-	ret = qat_alg_sgl_to_bufl(ctx->inst, req->src, req->dst, qat_req);
+	ret = qat_alg_sgl_to_bufl(ctx->inst, req->src, req->dst, qat_req, f);
 	if (unlikely(ret))
 		return ret;
 
@@ -1258,13 +1262,14 @@ static int qat_alg_skcipher_decrypt(struct skcipher_request *req)
 	struct qat_alg_skcipher_ctx *ctx = crypto_tfm_ctx(tfm);
 	struct qat_crypto_request *qat_req = skcipher_request_ctx(req);
 	struct icp_qat_fw_la_cipher_req_params *cipher_param;
+	gfp_t f = qat_algs_alloc_flags(&req->base);
 	struct icp_qat_fw_la_bulk_req *msg;
 	int ret;
 
 	if (req->cryptlen == 0)
 		return 0;
 
-	ret = qat_alg_sgl_to_bufl(ctx->inst, req->src, req->dst, qat_req);
+	ret = qat_alg_sgl_to_bufl(ctx->inst, req->src, req->dst, qat_req, f);
 	if (unlikely(ret))
 		return ret;
 
diff --git a/drivers/crypto/qat/qat_common/qat_asym_algs.c b/drivers/crypto/qat/qat_common/qat_asym_algs.c
index 7173a2a0a484..16d97db9ea15 100644
--- a/drivers/crypto/qat/qat_common/qat_asym_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_asym_algs.c
@@ -224,9 +224,10 @@ static int qat_dh_compute_value(struct kpp_request *req)
 	struct qat_asym_request *qat_req =
 			PTR_ALIGN(kpp_request_ctx(req), 64);
 	struct icp_qat_fw_pke_request *msg = &qat_req->req;
-	int ret;
+	gfp_t flags = qat_algs_alloc_flags(&req->base);
 	int n_input_params = 0;
 	u8 *vaddr;
+	int ret;
 
 	if (unlikely(!ctx->xa))
 		return -EINVAL;
@@ -291,7 +292,7 @@ static int qat_dh_compute_value(struct kpp_request *req)
 		} else {
 			int shift = ctx->p_size - req->src_len;
 
-			qat_req->src_align = kzalloc(ctx->p_size, GFP_KERNEL);
+			qat_req->src_align = kzalloc(ctx->p_size, flags);
 			if (unlikely(!qat_req->src_align))
 				return ret;
 
@@ -317,7 +318,7 @@ static int qat_dh_compute_value(struct kpp_request *req)
 		qat_req->dst_align = NULL;
 		vaddr = sg_virt(req->dst);
 	} else {
-		qat_req->dst_align = kzalloc(ctx->p_size, GFP_KERNEL);
+		qat_req->dst_align = kzalloc(ctx->p_size, flags);
 		if (unlikely(!qat_req->dst_align))
 			goto unmap_src;
 
@@ -650,6 +651,7 @@ static int qat_rsa_enc(struct akcipher_request *req)
 	struct qat_asym_request *qat_req =
 			PTR_ALIGN(akcipher_request_ctx(req), 64);
 	struct icp_qat_fw_pke_request *msg = &qat_req->req;
+	gfp_t flags = qat_algs_alloc_flags(&req->base);
 	u8 *vaddr;
 	int ret;
 
@@ -696,7 +698,7 @@ static int qat_rsa_enc(struct akcipher_request *req)
 	} else {
 		int shift = ctx->key_sz - req->src_len;
 
-		qat_req->src_align = kzalloc(ctx->key_sz, GFP_KERNEL);
+		qat_req->src_align = kzalloc(ctx->key_sz, flags);
 		if (unlikely(!qat_req->src_align))
 			return ret;
 
@@ -714,7 +716,7 @@ static int qat_rsa_enc(struct akcipher_request *req)
 		qat_req->dst_align = NULL;
 		vaddr = sg_virt(req->dst);
 	} else {
-		qat_req->dst_align = kzalloc(ctx->key_sz, GFP_KERNEL);
+		qat_req->dst_align = kzalloc(ctx->key_sz, flags);
 		if (unlikely(!qat_req->dst_align))
 			goto unmap_src;
 		vaddr = qat_req->dst_align;
@@ -783,6 +785,7 @@ static int qat_rsa_dec(struct akcipher_request *req)
 	struct qat_asym_request *qat_req =
 			PTR_ALIGN(akcipher_request_ctx(req), 64);
 	struct icp_qat_fw_pke_request *msg = &qat_req->req;
+	gfp_t flags = qat_algs_alloc_flags(&req->base);
 	u8 *vaddr;
 	int ret;
 
@@ -839,7 +842,7 @@ static int qat_rsa_dec(struct akcipher_request *req)
 	} else {
 		int shift = ctx->key_sz - req->src_len;
 
-		qat_req->src_align = kzalloc(ctx->key_sz, GFP_KERNEL);
+		qat_req->src_align = kzalloc(ctx->key_sz, flags);
 		if (unlikely(!qat_req->src_align))
 			return ret;
 
@@ -857,7 +860,7 @@ static int qat_rsa_dec(struct akcipher_request *req)
 		qat_req->dst_align = NULL;
 		vaddr = sg_virt(req->dst);
 	} else {
-		qat_req->dst_align = kzalloc(ctx->key_sz, GFP_KERNEL);
+		qat_req->dst_align = kzalloc(ctx->key_sz, flags);
 		if (unlikely(!qat_req->dst_align))
 			goto unmap_src;
 		vaddr = qat_req->dst_align;
diff --git a/drivers/crypto/qat/qat_common/qat_crypto.h b/drivers/crypto/qat/qat_common/qat_crypto.h
index 245b6d9a3650..df3c738ce323 100644
--- a/drivers/crypto/qat/qat_common/qat_crypto.h
+++ b/drivers/crypto/qat/qat_common/qat_crypto.h
@@ -109,4 +109,9 @@ static inline bool adf_hw_dev_has_crypto(struct adf_accel_dev *accel_dev)
 	return true;
 }
 
+static inline gfp_t qat_algs_alloc_flags(struct crypto_async_request *req)
+{
+	return req->flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
+}
+
 #endif
-- 
2.35.1