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crypto: mediatek - rework crypto request completion

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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>
This commit is contained in:
Ryder Lee 2017-01-20 13:41:11 +08:00 committed by Herbert Xu
parent 382ae57d5e
commit 87421984b4
2 changed files with 16 additions and 12 deletions
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25
drivers/crypto/mediatek/mtk-aes.c
View file

@ -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)

3
drivers/crypto/mediatek/mtk-platform.h
View file

@ -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;