[PATCH v4 10/11] crypto: qce - Add support for lock/unlock in sha

[Md Sadre Alam]

Add support for lock/unlock on bam pipe in sha.
If multiple EE's(Execution Environment) try to access
the same crypto engine then before accessing the crypto
engine EE's has to lock the bam pipe and then submit the
request to crypto engine. Once request done then EE's has
to unlock the bam pipe so that others EE's can access the
crypto engine.

Signed-off-by: Md Sadre Alam <quic_mdalam@xxxxxxxxxxx>
---

Change in [v4]

* No change
 
Change in [v3]

* Move qce_bam_release_lock() after qca_dma_terminate_all()
  api

Change in [v2]

* Added qce_bam_acquire_lock() and qce_bam_release_lock()
  api for SHA

Change in [v1]

* This patch was not included in [v1]

 drivers/crypto/qce/sha.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
index fc72af8aa9a7..abfa63ff18d7 100644
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -60,6 +60,8 @@ static void qce_ahash_done(void *data)
 	rctx->byte_count[0] = cpu_to_be32(result->auth_byte_count[0]);
 	rctx->byte_count[1] = cpu_to_be32(result->auth_byte_count[1]);
 
+	qce_bam_release_lock(qce);
+
 	error = qce_check_status(qce, &status);
 	if (error < 0)
 		dev_dbg(qce->dev, "ahash operation error (%x)\n", status);
@@ -90,6 +92,8 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
 		rctx->authklen = AES_KEYSIZE_128;
 	}
 
+	qce_bam_acquire_lock(qce);
+
 	rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
 	if (rctx->src_nents < 0) {
 		dev_err(qce->dev, "Invalid numbers of src SG.\n");
-- 
2.34.1