[v2 PATCH 8/9] crypto: kpp - Add ctx helpers with DMA alignment

Herbert Xu
2022-11-25T04:37:52Z

This patch adds helpers to access the kpp 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/kpp.h | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/include/crypto/internal/kpp.h b/include/crypto/internal/kpp.h
index 167662407e36..3c9726e89f53 100644
--- a/include/crypto/internal/kpp.h
+++ b/include/crypto/internal/kpp.h
@@ -50,15 +50,37 @@ static inline void *kpp_request_ctx(struct kpp_request *req)
return req->__ctx;
}

+static inline void *kpp_request_ctx_dma(struct kpp_request *req)
+{
+ unsigned int align = crypto_dma_align();
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+
+ return PTR_ALIGN(kpp_request_ctx(req), align);
+}
+
static inline void kpp_set_reqsize(struct crypto_kpp *kpp,
unsigned int reqsize)
{
kpp->reqsize = reqsize;
}

+static inline void kpp_set_reqsize_dma(struct crypto_kpp *kpp,
+ unsigned int reqsize)
+{
+ reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
+ kpp->reqsize = reqsize;
+}
+
static inline void *kpp_tfm_ctx(struct crypto_kpp *tfm)
{
- return tfm->base.__crt_ctx;
+ return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *kpp_tfm_ctx_dma(struct crypto_kpp *tfm)
+{
+ return crypto_tfm_ctx_dma(&tfm->base);
}

static inline void kpp_request_complete(struct kpp_request *req, int err)