[v2 PATCH 4/9] crypto: hash - Add ctx helpers with DMA alignment

Herbert Xu
2022-11-25T04:37:07Z

This patch adds helpers to access the ahash context structure and
request context structure with an added alignment for DMA access.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

include/crypto/internal/hash.h | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index 25806141db59..a871b46a24da 100644
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -134,6 +134,11 @@ static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
return crypto_tfm_ctx(crypto_ahash_tfm(tfm));
}

+static inline void *crypto_ahash_ctx_dma(struct crypto_ahash *tfm)
+{
+ return crypto_tfm_ctx_dma(crypto_ahash_tfm(tfm));
+}
+
static inline struct ahash_alg *__crypto_ahash_alg(struct crypto_alg *alg)
{
return container_of(__crypto_hash_alg_common(alg), struct ahash_alg,
@@ -146,6 +151,13 @@ static inline void crypto_ahash_set_reqsize(struct crypto_ahash *tfm,
tfm->reqsize = reqsize;
}

+static inline void crypto_ahash_set_reqsize_dma(struct crypto_ahash *ahash,
+ unsigned int reqsize)
+{
+ reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
+ ahash->reqsize = reqsize;
+}
+
static inline struct crypto_instance *ahash_crypto_instance(
struct ahash_instance *inst)
{
@@ -169,6 +181,16 @@ static inline void *ahash_instance_ctx(struct ahash_instance *inst)
return crypto_instance_ctx(ahash_crypto_instance(inst));
}

+static inline void *ahash_request_ctx_dma(struct ahash_request *req)
+{
+ unsigned int align = crypto_dma_align();
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+
+ return PTR_ALIGN(ahash_request_ctx(req), align);
+}
+
static inline void ahash_request_complete(struct ahash_request *req, int err)
{
req->base.complete(&req->base, err);