[CRYPTO] cryptd: Add software async crypto daemon

This patch adds the cryptd module which is a template that takes a
synchronous software crypto algorithm and converts it to an asynchronous
one by executing it in a kernel thread.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 7847fc2a03f0..b2b1e6efd812 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -138,6 +138,12 @@ static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
         return (void *)ALIGN(addr, align);
 }
 
+static inline struct crypto_instance *crypto_tfm_alg_instance(
+        struct crypto_tfm *tfm)
+{
+        return container_of(tfm->__crt_alg, struct crypto_instance, alg);
+}
+
 static inline void *crypto_instance_ctx(struct crypto_instance *inst)
 {
         return inst->__ctx;
@@ -154,6 +160,15 @@ static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
         return crypto_tfm_ctx(&tfm->base);
 }
 
+static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
+        struct crypto_spawn *spawn)
+{
+        u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
+        u32 mask = CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC;
+
+        return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
 static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
 {
         return crypto_tfm_ctx(&tfm->base);