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 <horia.geanta@xxxxxxxxxxxxx>
---
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))
--
1.8.3.1
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