Bypass crypto-engine software queue, if empty, and send the request
directly to hardware. If this returns -ENOSPC, transfer the request to
crypto-engine and let it handle it.
Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx>
---
drivers/crypto/caam/jr.c | 29 ++++++++++++++++++++++++++---
1 file changed, 26 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c
index 5c55d3d..ddf3d39 100644
--- a/drivers/crypto/caam/jr.c
+++ b/drivers/crypto/caam/jr.c
@@ -476,10 +476,33 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
struct caam_drv_private_jr *jrpriv = dev_get_drvdata(dev);
struct caam_jr_request_entry *jrentry = areq;
struct crypto_async_request *req = jrentry->base;
+ int ret;
- if (req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
- return transfer_request_to_engine(jrpriv->engine, req);
-
+ if (req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG) {
+ if (crypto_queue_len(&jrpriv->engine->queue) == 0) {
+ /*
+ * send the request to CAAM, if crypto-engine queue
+ * is empty
+ */
+ ret = caam_jr_enqueue_no_bklog(dev, desc, cbk, jrentry);
+ if (ret == -ENOSPC)
+ /*
+ * CAAM has no space, so transfer the request
+ * to crypto-engine
+ */
+ return transfer_request_to_engine(jrpriv->engine,
+ req);
+ else
+ return ret;
+ } else {
+ /*
+ * crypto-engine queue is not empty, so transfer the
+ * request to crypto-engine, to keep the order
+ * of requests
+ */
+ return transfer_request_to_engine(jrpriv->engine, req);
+ }
+ }
return caam_jr_enqueue_no_bklog(dev, desc, cbk, jrentry);
}
EXPORT_SYMBOL(caam_jr_enqueue);
--
2.1.0
