[RFC PATCH 2/7] crypto: api - Add crypto_tfm_ctx_dma

Herbert Xu
2022-05-10T11:08:11Z

This patch adds the helper crypto_tfm_ctx_dma. It's similar to
crypto_tfm_ctx_aligned but the alignment is hard-coded to the
macro ARCH_DMA_MINALIGN.

This patch also moves crypto_tfm_ctx into algapi.h.

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

include/crypto/algapi.h | 28 ++++++++++++++++++++++++++--
include/linux/crypto.h | 5 -----
2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index f50c5d1725da5..cdf12e51c53a0 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -189,10 +189,34 @@ static inline void crypto_xor_cpy(u8 *dst, const u8 *src1, const u8 *src2,
}
}

+static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
+{
+ return tfm->__crt_ctx;
+}
+
+static inline void *crypto_tfm_ctx_align(struct crypto_tfm *tfm,
+ unsigned int align)
+{
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+
+ return PTR_ALIGN(crypto_tfm_ctx(tfm), align);
+}
+
static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
- return PTR_ALIGN(crypto_tfm_ctx(tfm),
- crypto_tfm_alg_alignmask(tfm) + 1);
+ return crypto_tfm_ctx_align(tfm, crypto_tfm_alg_alignmask(tfm) + 1);
+}
+
+static inline void *crypto_tfm_ctx_dma(struct crypto_tfm *tfm)
+{
+ unsigned int align = 1;
+
+#ifdef ARCH_DMA_MINALIGN
+ align = ARCH_DMA_MINALIGN;
+#endif
+
+ return crypto_tfm_ctx_align(tfm, align);
}

static inline struct crypto_instance *crypto_tfm_alg_instance(
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 2324ab6f1846b..5d1e961f810ec 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -714,11 +714,6 @@ static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
tfm->crt_flags &= ~flags;
}

-static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
-{
- return tfm->__crt_ctx;
-}
-
static inline unsigned int crypto_tfm_ctx_alignment(void)
{
struct crypto_tfm *tfm;