crypto: hisilicon/hpre - Set DMA alignment explicitly

This driver has been implicitly relying on kmalloc alignment
to be sufficient for DMA.  This may no longer be the case with
upcoming arm64 changes.

This patch changes it to explicitly request DMA alignment from
the Crypto API.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/hisilicon/hpre/hpre_crypto.c

@@ -147,6 +147,16 @@ struct hpre_asym_request {
 	struct timespec64 req_time;
 };
 
+static inline unsigned int hpre_align_sz(void)
+{
+	return ((crypto_dma_align() - 1) | (HPRE_ALIGN_SZ - 1)) + 1;
+}
+
+static inline unsigned int hpre_align_pd(void)
+{
+	return (hpre_align_sz() - 1) & ~(crypto_tfm_ctx_alignment() - 1);
+}
+
 static int hpre_alloc_req_id(struct hpre_ctx *ctx)
 {
 	unsigned long flags;
@@ -517,7 +527,7 @@ static int hpre_msg_request_set(struct hpre_ctx *ctx, void *req, bool is_rsa)
 		}
 
 		tmp = akcipher_request_ctx(akreq);
-		h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+		h_req = PTR_ALIGN(tmp, hpre_align_sz());
 		h_req->cb = hpre_rsa_cb;
 		h_req->areq.rsa = akreq;
 		msg = &h_req->req;
@@ -531,7 +541,7 @@ static int hpre_msg_request_set(struct hpre_ctx *ctx, void *req, bool is_rsa)
 		}
 
 		tmp = kpp_request_ctx(kreq);
-		h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+		h_req = PTR_ALIGN(tmp, hpre_align_sz());
 		h_req->cb = hpre_dh_cb;
 		h_req->areq.dh = kreq;
 		msg = &h_req->req;
@@ -582,7 +592,7 @@ static int hpre_dh_compute_value(struct kpp_request *req)
 	struct crypto_kpp *tfm = crypto_kpp_reqtfm(req);
 	struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
 	void *tmp = kpp_request_ctx(req);
-	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, hpre_align_sz());
 	struct hpre_sqe *msg = &hpre_req->req;
 	int ret;
 
@@ -740,7 +750,7 @@ static int hpre_dh_init_tfm(struct crypto_kpp *tfm)
 {
 	struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
 
-	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ);
+	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + hpre_align_pd());
 
 	return hpre_ctx_init(ctx, HPRE_V2_ALG_TYPE);
 }
@@ -785,7 +795,7 @@ static int hpre_rsa_enc(struct akcipher_request *req)
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct hpre_ctx *ctx = akcipher_tfm_ctx(tfm);
 	void *tmp = akcipher_request_ctx(req);
-	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, hpre_align_sz());
 	struct hpre_sqe *msg = &hpre_req->req;
 	int ret;
 
@@ -833,7 +843,7 @@ static int hpre_rsa_dec(struct akcipher_request *req)
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct hpre_ctx *ctx = akcipher_tfm_ctx(tfm);
 	void *tmp = akcipher_request_ctx(req);
-	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, hpre_align_sz());
 	struct hpre_sqe *msg = &hpre_req->req;
 	int ret;
 
@@ -1168,7 +1178,7 @@ static int hpre_rsa_init_tfm(struct crypto_akcipher *tfm)
 	}
 
 	akcipher_set_reqsize(tfm, sizeof(struct hpre_asym_request) +
-				  HPRE_ALIGN_SZ);
+				  hpre_align_pd());
 
 	ret = hpre_ctx_init(ctx, HPRE_V2_ALG_TYPE);
 	if (ret)
@@ -1490,7 +1500,7 @@ static int hpre_ecdh_msg_request_set(struct hpre_ctx *ctx,
 	}
 
 	tmp = kpp_request_ctx(req);
-	h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	h_req = PTR_ALIGN(tmp, hpre_align_sz());
 	h_req->cb = hpre_ecdh_cb;
 	h_req->areq.ecdh = req;
 	msg = &h_req->req;
@@ -1571,7 +1581,7 @@ static int hpre_ecdh_compute_value(struct kpp_request *req)
 	struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
 	struct device *dev = ctx->dev;
 	void *tmp = kpp_request_ctx(req);
-	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, hpre_align_sz());
 	struct hpre_sqe *msg = &hpre_req->req;
 	int ret;
 
@@ -1622,7 +1632,7 @@ static int hpre_ecdh_nist_p192_init_tfm(struct crypto_kpp *tfm)
 
 	ctx->curve_id = ECC_CURVE_NIST_P192;
 
-	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ);
+	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + hpre_align_pd());
 
 	return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
 }
@@ -1633,7 +1643,7 @@ static int hpre_ecdh_nist_p256_init_tfm(struct crypto_kpp *tfm)
 
 	ctx->curve_id = ECC_CURVE_NIST_P256;
 
-	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ);
+	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + hpre_align_pd());
 
 	return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
 }
@@ -1644,7 +1654,7 @@ static int hpre_ecdh_nist_p384_init_tfm(struct crypto_kpp *tfm)
 
 	ctx->curve_id = ECC_CURVE_NIST_P384;
 
-	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ);
+	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + hpre_align_pd());
 
 	return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
 }
@@ -1802,7 +1812,7 @@ static int hpre_curve25519_msg_request_set(struct hpre_ctx *ctx,
 	}
 
 	tmp = kpp_request_ctx(req);
-	h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	h_req = PTR_ALIGN(tmp, hpre_align_sz());
 	h_req->cb = hpre_curve25519_cb;
 	h_req->areq.curve25519 = req;
 	msg = &h_req->req;
@@ -1923,7 +1933,7 @@ static int hpre_curve25519_compute_value(struct kpp_request *req)
 	struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
 	struct device *dev = ctx->dev;
 	void *tmp = kpp_request_ctx(req);
-	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ);
+	struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, hpre_align_sz());
 	struct hpre_sqe *msg = &hpre_req->req;
 	int ret;
 
@@ -1972,7 +1982,7 @@ static int hpre_curve25519_init_tfm(struct crypto_kpp *tfm)
 {
 	struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
 
-	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ);
+	kpp_set_reqsize(tfm, sizeof(struct hpre_asym_request) + hpre_align_pd());
 
 	return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
 }