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>

diff --git a/drivers/crypto/mediatek/mtk-aes.c b/drivers/crypto/mediatek/mtk-aes.c
index 7e5a8e0..9c4e468 100644 (file)
--- a/drivers/crypto/mediatek/mtk-aes.c
+++ b/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)

diff --git a/drivers/crypto/mediatek/mtk-platform.h b/drivers/crypto/mediatek/mtk-platform.h
index 9f5210c..36d166b 100644 (file)
--- a/drivers/crypto/mediatek/mtk-platform.h
+++ b/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;