1 files changed, 40 insertions, 0 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index fc0d575c71e0..59c3e5bd2c06 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -103,6 +103,23 @@ struct blkcipher_walk {
         unsigned int blocksize;
 };
 
+struct ablkcipher_walk {
+        struct {
+                struct page *page;
+                unsigned int offset;
+        } src, dst;
+
+        struct scatter_walk     in;
+        unsigned int            nbytes;
+        struct scatter_walk     out;
+        unsigned int            total;
+        struct list_head        buffers;
+        u8                      *iv_buffer;
+        u8                      *iv;
+        int                     flags;
+        unsigned int            blocksize;
+};
+
 extern const struct crypto_type crypto_ablkcipher_type;
 extern const struct crypto_type crypto_aead_type;
 extern const struct crypto_type crypto_blkcipher_type;
@@ -173,6 +190,12 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
                               struct blkcipher_walk *walk,
                               unsigned int blocksize);
 
+int ablkcipher_walk_done(struct ablkcipher_request *req,
+                         struct ablkcipher_walk *walk, int err);
+int ablkcipher_walk_phys(struct ablkcipher_request *req,
+                         struct ablkcipher_walk *walk);
+void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
+
 static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
 {
         return PTR_ALIGN(crypto_tfm_ctx(tfm),
@@ -283,6 +306,23 @@ static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
         walk->total = nbytes;
 }
 
+static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
+                                        struct scatterlist *dst,
+                                        struct scatterlist *src,
+                                        unsigned int nbytes)
+{
+        walk->in.sg = src;
+        walk->out.sg = dst;
+        walk->total = nbytes;
+        INIT_LIST_HEAD(&walk->buffers);
+}
+
+static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
+{
+        if (unlikely(!list_empty(&walk->buffers)))
+                __ablkcipher_walk_complete(walk);
+}
+
 static inline struct crypto_async_request *crypto_get_backlog(
         struct crypto_queue *queue)
 {