crypto: mediatek - rework crypto request completion

This patch introduces a new callback 'resume' in the struct mtk_aes_rec.
This callback is run to resume/complete the processing of the crypto
request when woken up by AES interrupts when DMA completion.

This callback will help implementing the GCM mode support in further
patches.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/mediatek/mtk-aes.c

@@ -406,6 +406,15 @@ static int mtk_aes_handle_queue(struct mtk_cryp *cryp, u8 id,
 	return ctx->start(cryp, aes);
 }
 
+static int mtk_aes_complete(struct mtk_cryp *cryp, struct mtk_aes_rec *aes)
+{
+	aes->flags &= ~AES_FLAGS_BUSY;
+	aes->areq->complete(aes->areq, 0);
+
+	/* Handle new request */
+	return mtk_aes_handle_queue(cryp, aes->id, NULL);
+}
+
 static int mtk_aes_start(struct mtk_cryp *cryp, struct mtk_aes_rec *aes)
 {
 	struct ablkcipher_request *req = ablkcipher_request_cast(aes->areq);
@@ -416,6 +425,8 @@ static int mtk_aes_start(struct mtk_cryp *cryp, struct mtk_aes_rec *aes)
 	rctx->mode &= AES_FLAGS_MODE_MSK;
 	aes->flags = (aes->flags & ~AES_FLAGS_MODE_MSK) | rctx->mode;
 
+	aes->resume = mtk_aes_complete;
+
 	err = mtk_aes_map(cryp, aes, req->src, req->dst, req->nbytes);
 	if (err)
 		return err;
@@ -458,16 +469,6 @@ static void mtk_aes_unmap(struct mtk_cryp *cryp, struct mtk_aes_rec *aes)
 				    aes->buf, aes->total);
 }
 
-static inline void mtk_aes_complete(struct mtk_cryp *cryp,
-				    struct mtk_aes_rec *aes)
-{
-	aes->flags &= ~AES_FLAGS_BUSY;
-	aes->areq->complete(aes->areq, 0);
-
-	/* Handle new request */
-	mtk_aes_handle_queue(cryp, aes->id, NULL);
-}
-
 /* Check and set the AES key to transform state buffer */
 static int mtk_aes_setkey(struct crypto_ablkcipher *tfm,
 			  const u8 *key, u32 keylen)
@@ -591,7 +592,7 @@ static void mtk_aes_enc_task(unsigned long data)
 	struct mtk_aes_rec *aes = cryp->aes[0];
 
 	mtk_aes_unmap(cryp, aes);
-	mtk_aes_complete(cryp, aes);
+	aes->resume(cryp, aes);
 }
 
 static void mtk_aes_dec_task(unsigned long data)
@@ -600,7 +601,7 @@ static void mtk_aes_dec_task(unsigned long data)
 	struct mtk_aes_rec *aes = cryp->aes[1];
 
 	mtk_aes_unmap(cryp, aes);
-	mtk_aes_complete(cryp, aes);
+	aes->resume(cryp, aes);
 }
 
 static irqreturn_t mtk_aes_enc_irq(int irq, void *dev_id)

drivers/crypto/mediatek/mtk-platform.h

@@ -131,6 +131,7 @@ typedef int (*mtk_aes_fn)(struct mtk_cryp *cryp, struct mtk_aes_rec *aes);
  * @dst:	the structure that holds destination sg list info
  * @aligned_sg:	the scatter list is use to alignment
  * @real_dst:	pointer to the destination sg list
+ * @resume:	pointer to resume function
  * @total:	request buffer length
  * @buf:	pointer to page buffer
  * @id:		record identification
@@ -150,6 +151,8 @@ struct mtk_aes_rec {
 	struct scatterlist aligned_sg;
 	struct scatterlist *real_dst;
 
+	mtk_aes_fn resume;
+
 	size_t total;
 	void *buf;