[v2 PATCH 5/9] crypto: skcipher - Add ctx helpers with DMA alignment
From: "Herbert Xu" <herbert@gondor.apana.org.au>
Date: 2022-11-25 04:37:32
Also in:
linux-crypto, linux-mm, lkml
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
This patch adds helpers to access the skcipher 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/skcipher.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)
diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index a2339f80a615..a05a55af5b2c 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h@@ -122,6 +122,13 @@ static inline void crypto_skcipher_set_reqsize( skcipher->reqsize = reqsize; } +static inline void crypto_skcipher_set_reqsize_dma( + struct crypto_skcipher *skcipher, unsigned int reqsize) +{ + reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1); + skcipher->reqsize = reqsize; +} + int crypto_register_skcipher(struct skcipher_alg *alg); void crypto_unregister_skcipher(struct skcipher_alg *alg); int crypto_register_skciphers(struct skcipher_alg *algs, int count);
@@ -151,11 +158,26 @@ static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm) return crypto_tfm_ctx(&tfm->base); } +static inline void *crypto_skcipher_ctx_dma(struct crypto_skcipher *tfm) +{ + return crypto_tfm_ctx_dma(&tfm->base); +} + static inline void *skcipher_request_ctx(struct skcipher_request *req) { return req->__ctx; } +static inline void *skcipher_request_ctx_dma(struct skcipher_request *req) +{ + unsigned int align = crypto_dma_align(); + + if (align <= crypto_tfm_ctx_alignment()) + align = 1; + + return PTR_ALIGN(skcipher_request_ctx(req), align); +} + static inline u32 skcipher_request_flags(struct skcipher_request *req) { return req->base.flags;
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