4 files changed, 101 insertions, 40 deletions

diff --git a/crypto/async_tx/Kconfig b/crypto/async_tx/Kconfig
index e5aeb2b79e6f..e28e276ac611 100644
--- a/crypto/async_tx/Kconfig
+++ b/crypto/async_tx/Kconfig
@@ -23,3 +23,8 @@ config ASYNC_RAID6_RECOV
         select ASYNC_CORE
         select ASYNC_PQ
 
+config ASYNC_TX_DISABLE_PQ_VAL_DMA
+        bool
+
+config ASYNC_TX_DISABLE_XOR_VAL_DMA
+        bool
diff --git a/crypto/async_tx/async_pq.c b/crypto/async_tx/async_pq.c
index 6b5cc4fba59f..ec87f53d5059 100644
--- a/crypto/async_tx/async_pq.c
+++ b/crypto/async_tx/async_pq.c
@@ -240,6 +240,16 @@ async_gen_syndrome(struct page **blocks, unsigned int offset, int disks,
 }
 EXPORT_SYMBOL_GPL(async_gen_syndrome);
 
+static inline struct dma_chan *
+pq_val_chan(struct async_submit_ctl *submit, struct page **blocks, int disks, size_t len)
+{
+        #ifdef CONFIG_ASYNC_TX_DISABLE_PQ_VAL_DMA
+        return NULL;
+        #endif
+        return async_tx_find_channel(submit, DMA_PQ_VAL, NULL, 0,  blocks,
+                                     disks, len);
+}
+
 /**
  * async_syndrome_val - asynchronously validate a raid6 syndrome
  * @blocks: source blocks from idx 0..disks-3, P @ disks-2 and Q @ disks-1
@@ -260,9 +270,7 @@ async_syndrome_val(struct page **blocks, unsigned int offset, int disks,
                    size_t len, enum sum_check_flags *pqres, struct page *spare,
                    struct async_submit_ctl *submit)
 {
-        struct dma_chan *chan = async_tx_find_channel(submit, DMA_PQ_VAL,
-                                                      NULL, 0,  blocks, disks,
-                                                      len);
+        struct dma_chan *chan = pq_val_chan(submit, blocks, disks, len);
         struct dma_device *device = chan ? chan->device : NULL;
         struct dma_async_tx_descriptor *tx;
         unsigned char coefs[disks-2];
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 79182dcb91b7..079ae8ca590b 100644
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -234,6 +234,17 @@ static int page_is_zero(struct page *p, unsigned int offset, size_t len)
                 memcmp(a, a + 4, len - 4) == 0);
 }
 
+static inline struct dma_chan *
+xor_val_chan(struct async_submit_ctl *submit, struct page *dest,
+                 struct page **src_list, int src_cnt, size_t len)
+{
+        #ifdef CONFIG_ASYNC_TX_DISABLE_XOR_VAL_DMA
+        return NULL;
+        #endif
+        return async_tx_find_channel(submit, DMA_XOR_VAL, &dest, 1, src_list,
+                                     src_cnt, len);
+}
+
 /**
  * async_xor_val - attempt a xor parity check with a dma engine.
  * @dest: destination page used if the xor is performed synchronously
@@ -255,9 +266,7 @@ async_xor_val(struct page *dest, struct page **src_list, unsigned int offset,
               int src_cnt, size_t len, enum sum_check_flags *result,
               struct async_submit_ctl *submit)
 {
-        struct dma_chan *chan = async_tx_find_channel(submit, DMA_XOR_VAL,
-                                                      &dest, 1, src_list,
-                                                      src_cnt, len);
+        struct dma_chan *chan = xor_val_chan(submit, dest, src_list, src_cnt, len);
         struct dma_device *device = chan ? chan->device : NULL;
         struct dma_async_tx_descriptor *tx = NULL;
         dma_addr_t *dma_src = NULL;
diff --git a/crypto/gcm.c b/crypto/gcm.c
index 5fc3292483ef..c6547130624c 100644
--- a/crypto/gcm.c
+++ b/crypto/gcm.c
@@ -40,7 +40,7 @@ struct crypto_rfc4106_ctx {
 struct crypto_gcm_ghash_ctx {
         unsigned int cryptlen;
         struct scatterlist *src;
-        crypto_completion_t complete;
+        void (*complete)(struct aead_request *req, int err);
 };
 
 struct crypto_gcm_req_priv_ctx {
@@ -267,23 +267,26 @@ static int gcm_hash_final(struct aead_request *req,
         return crypto_ahash_final(ahreq);
 }
 
-static void gcm_hash_final_done(struct crypto_async_request *areq,
-                                int err)
+static void __gcm_hash_final_done(struct aead_request *req, int err)
 {
-        struct aead_request *req = areq->data;
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
 
         if (!err)
                 crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
 
-        gctx->complete(areq, err);
+        gctx->complete(req, err);
 }
 
-static void gcm_hash_len_done(struct crypto_async_request *areq,
-                              int err)
+static void gcm_hash_final_done(struct crypto_async_request *areq, int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_final_done(req, err);
+}
+
+static void __gcm_hash_len_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
         if (!err) {
@@ -292,13 +295,18 @@ static void gcm_hash_len_done(struct crypto_async_request *areq,
                         return;
         }
 
-        gcm_hash_final_done(areq, err);
+        __gcm_hash_final_done(req, err);
 }
 
-static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
-                                       int err)
+static void gcm_hash_len_done(struct crypto_async_request *areq, int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_len_done(req, err);
+}
+
+static void __gcm_hash_crypt_remain_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
         if (!err) {
@@ -307,13 +315,19 @@ static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
                         return;
         }
 
-        gcm_hash_len_done(areq, err);
+        __gcm_hash_len_done(req, err);
 }
 
-static void gcm_hash_crypt_done(struct crypto_async_request *areq,
-                                int err)
+static void gcm_hash_crypt_remain_done(struct crypto_async_request *areq,
+                                       int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_crypt_remain_done(req, err);
+}
+
+static void __gcm_hash_crypt_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
         unsigned int remain;
@@ -327,13 +341,18 @@ static void gcm_hash_crypt_done(struct crypto_async_request *areq,
                         return;
         }
 
-        gcm_hash_crypt_remain_done(areq, err);
+        __gcm_hash_crypt_remain_done(req, err);
 }
 
-static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
-                                           int err)
+static void gcm_hash_crypt_done(struct crypto_async_request *areq, int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_crypt_done(req, err);
+}
+
+static void __gcm_hash_assoc_remain_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
         crypto_completion_t complete;
@@ -350,15 +369,21 @@ static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
         }
 
         if (remain)
-                gcm_hash_crypt_done(areq, err);
+                __gcm_hash_crypt_done(req, err);
         else
-                gcm_hash_crypt_remain_done(areq, err);
+                __gcm_hash_crypt_remain_done(req, err);
 }
 
-static void gcm_hash_assoc_done(struct crypto_async_request *areq,
-                                int err)
+static void gcm_hash_assoc_remain_done(struct crypto_async_request *areq,
+                                       int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_assoc_remain_done(req, err);
+}
+
+static void __gcm_hash_assoc_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         unsigned int remain;
 
@@ -371,13 +396,18 @@ static void gcm_hash_assoc_done(struct crypto_async_request *areq,
                         return;
         }
 
-        gcm_hash_assoc_remain_done(areq, err);
+        __gcm_hash_assoc_remain_done(req, err);
 }
 
-static void gcm_hash_init_done(struct crypto_async_request *areq,
-                               int err)
+static void gcm_hash_assoc_done(struct crypto_async_request *areq, int err)
 {
         struct aead_request *req = areq->data;
+
+        __gcm_hash_assoc_done(req, err);
+}
+
+static void __gcm_hash_init_done(struct aead_request *req, int err)
+{
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         crypto_completion_t complete;
         unsigned int remain = 0;
@@ -393,9 +423,16 @@ static void gcm_hash_init_done(struct crypto_async_request *areq,
         }
 
         if (remain)
-                gcm_hash_assoc_done(areq, err);
+                __gcm_hash_assoc_done(req, err);
         else
-                gcm_hash_assoc_remain_done(areq, err);
+                __gcm_hash_assoc_remain_done(req, err);
+}
+
+static void gcm_hash_init_done(struct crypto_async_request *areq, int err)
+{
+        struct aead_request *req = areq->data;
+
+        __gcm_hash_init_done(req, err);
 }
 
 static int gcm_hash(struct aead_request *req,
@@ -457,10 +494,8 @@ static void gcm_enc_copy_hash(struct aead_request *req,
                                  crypto_aead_authsize(aead), 1);
 }
 
-static void gcm_enc_hash_done(struct crypto_async_request *areq,
-                                     int err)
+static void gcm_enc_hash_done(struct aead_request *req, int err)
 {
-        struct aead_request *req = areq->data;
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
 
         if (!err)
@@ -469,8 +504,7 @@ static void gcm_enc_hash_done(struct crypto_async_request *areq,
         aead_request_complete(req, err);
 }
 
-static void gcm_encrypt_done(struct crypto_async_request *areq,
-                                     int err)
+static void gcm_encrypt_done(struct crypto_async_request *areq, int err)
 {
         struct aead_request *req = areq->data;
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
@@ -479,9 +513,13 @@ static void gcm_encrypt_done(struct crypto_async_request *areq,
                 err = gcm_hash(req, pctx);
                 if (err == -EINPROGRESS || err == -EBUSY)
                         return;
+                else if (!err) {
+                        crypto_xor(pctx->auth_tag, pctx->iauth_tag, 16);
+                        gcm_enc_copy_hash(req, pctx);
+                }
         }
 
-        gcm_enc_hash_done(areq, err);
+        aead_request_complete(req, err);
 }
 
 static int crypto_gcm_encrypt(struct aead_request *req)
@@ -538,9 +576,8 @@ static void gcm_decrypt_done(struct crypto_async_request *areq, int err)
         aead_request_complete(req, err);
 }
 
-static void gcm_dec_hash_done(struct crypto_async_request *areq, int err)
+static void gcm_dec_hash_done(struct aead_request *req, int err)
 {
-        struct aead_request *req = areq->data;
         struct crypto_gcm_req_priv_ctx *pctx = crypto_gcm_reqctx(req);
         struct ablkcipher_request *abreq = &pctx->u.abreq;
         struct crypto_gcm_ghash_ctx *gctx = &pctx->ghash_ctx;
@@ -552,9 +589,11 @@ static void gcm_dec_hash_done(struct crypto_async_request *areq, int err)
                 err = crypto_ablkcipher_decrypt(abreq);
                 if (err == -EINPROGRESS || err == -EBUSY)
                         return;
+                else if (!err)
+                        err = crypto_gcm_verify(req, pctx);
         }
 
-        gcm_decrypt_done(areq, err);
+        aead_request_complete(req, err);
 }
 
 static int crypto_gcm_decrypt(struct aead_request *req)