On 3/13/2015 7:14 PM, Horia Geanta wrote:
> The CRYPTO_TFM_REQ_DMA flag can be used by backend implementations to
> indicate to crypto API the need to allocate GFP_DMA memory
> for private contexts of the crypto requests.
>
> Signed-off-by: Horia Geanta <[email protected]>
> ---
ahash_request_alloc() update is missing from the patch.
> include/linux/crypto.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/include/linux/crypto.h b/include/linux/crypto.h
> index fb5ef16d6a12..64258c9198d5 100644
> --- a/include/linux/crypto.h
> +++ b/include/linux/crypto.h
> @@ -103,6 +103,7 @@
> #define CRYPTO_TFM_REQ_WEAK_KEY 0x00000100
> #define CRYPTO_TFM_REQ_MAY_SLEEP 0x00000200
> #define CRYPTO_TFM_REQ_MAY_BACKLOG 0x00000400
> +#define CRYPTO_TFM_REQ_DMA 0x00000800
> #define CRYPTO_TFM_RES_WEAK_KEY 0x00100000
> #define CRYPTO_TFM_RES_BAD_KEY_LEN 0x00200000
> #define CRYPTO_TFM_RES_BAD_KEY_SCHED 0x00400000
> @@ -1108,6 +1109,10 @@ static inline struct ablkcipher_request
> *ablkcipher_request_alloc(
> {
> struct ablkcipher_request *req;
>
> + if (crypto_ablkcipher_reqsize(tfm) &&
> + (crypto_ablkcipher_get_flags(tfm) & CRYPTO_TFM_REQ_DMA))
> + gfp |= GFP_DMA;
> +
> req = kmalloc(sizeof(struct ablkcipher_request) +
> crypto_ablkcipher_reqsize(tfm), gfp);
>
> @@ -1471,6 +1476,10 @@ static inline struct aead_request
> *aead_request_alloc(struct crypto_aead *tfm,
> {
> struct aead_request *req;
>
> + if (crypto_aead_reqsize(tfm) &&
> + (crypto_aead_get_flags(tfm) & CRYPTO_TFM_REQ_DMA))
> + gfp |= GFP_DMA;
> +
> req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp);
>
> if (likely(req))
>
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