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crypto: api - Add crypto_tfm_ctx_dma

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This patch adds the helpers crypto_tfm_ctx_aligned and
crypto_tfm_ctx_dma.  The first aligns the tfm context to the
value cra_alignmask.  The second sets the alignment according
to dma_cache_get_alignment();

This patch also moves crypto_tfm_ctx into algapi.h.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2022-11-25 12:36:31 +08:00
parent 14386d4713
commit e634ac4a8a
2 changed files with 39 additions and 7 deletions
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41
include/crypto/algapi.h
View file

@ -7,6 +7,7 @@
#ifndef _CRYPTO_ALGAPI_H #ifndef _CRYPTO_ALGAPI_H
#define _CRYPTO_ALGAPI_H #define _CRYPTO_ALGAPI_H
#include <asm/cache.h>
#include <linux/align.h> #include <linux/align.h>
#include <linux/crypto.h> #include <linux/crypto.h>
#include <linux/kconfig.h> #include <linux/kconfig.h>
@ -25,6 +26,14 @@
#define MAX_CIPHER_BLOCKSIZE 16 #define MAX_CIPHER_BLOCKSIZE 16
#define MAX_CIPHER_ALIGNMASK 15 #define MAX_CIPHER_ALIGNMASK 15
#ifdef ARCH_DMA_MINALIGN
#define CRYPTO_DMA_ALIGN ARCH_DMA_MINALIGN
#else
#define CRYPTO_DMA_ALIGN CRYPTO_MINALIGN
#endif
#define CRYPTO_DMA_PADDING ((CRYPTO_DMA_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1))
struct crypto_aead; struct crypto_aead;
struct crypto_instance; struct crypto_instance;
struct module; struct module;
@ -189,10 +198,38 @@ 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) static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{ {
return PTR_ALIGN(crypto_tfm_ctx(tfm), return crypto_tfm_ctx_align(tfm, crypto_tfm_alg_alignmask(tfm) + 1);
crypto_tfm_alg_alignmask(tfm) + 1); }
static inline unsigned int crypto_dma_align(void)
{
return CRYPTO_DMA_ALIGN;
}
static inline unsigned int crypto_dma_padding(void)
{
return (crypto_dma_align() - 1) & ~(crypto_tfm_ctx_alignment() - 1);
}
static inline void *crypto_tfm_ctx_dma(struct crypto_tfm *tfm)
{
return crypto_tfm_ctx_align(tfm, crypto_dma_align());
} }
static inline struct crypto_instance *crypto_tfm_alg_instance( static inline struct crypto_instance *crypto_tfm_alg_instance(

5
include/linux/crypto.h
View file

@ -714,11 +714,6 @@ static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
tfm->crt_flags &= ~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) static inline unsigned int crypto_tfm_ctx_alignment(void)
{ {
struct crypto_tfm *tfm; struct crypto_tfm *tfm;