MLBEDSW-3425: Added external API for driver actions

Added external API to add driver actions to a command stream.

Change-Id: Ie4779c1c745defc5769fa694358470cd6aea191c
Signed-off-by: Louis Verhaard <louis.verhaard@arm.com>

2 files changed, 43 insertions, 11 deletions

diff --git a/ethosu/vela/test/extapi/test_extapi_create_payload.py b/ethosu/vela/test/extapi/test_extapi_create_payload.py
new file mode 100644
index 00000000..06dd220d
--- /dev/null
+++ b/ethosu/vela/test/extapi/test_extapi_create_payload.py
@@ -0,0 +1,42 @@
+# Copyright (C) 2020 Arm Limited or its affiliates. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the License); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an AS IS BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Description:
+# Contains unit tests for npu_create_driver_payload API for an external consumer
+import random
+
+import pytest
+
+from ethosu.vela.api import npu_create_driver_payload
+from ethosu.vela.api import NpuAccelerator
+
+
+@pytest.mark.parametrize("accelerator", list(NpuAccelerator))
+def test_create_driver_payload(accelerator: NpuAccelerator):
+    """Tests npu_create_driver_payload"""
+    # Generate a random command stream with defined beginning and end
+    random.seed(0)
+    num_commands = 793
+    register_command_stream = random.choices(range(1 << 32), k=num_commands)
+    register_command_stream[0] = 0xFEDCBA98
+    register_command_stream[-1] = 0xA0B1C2D3
+    payload = npu_create_driver_payload(register_command_stream, accelerator)
+    header_size = 32  # expected driver header size in bytes
+    assert len(payload) == header_size + 4 * num_commands
+    # Check that the first register command is located directly after the header
+    assert list(payload[header_size : header_size + 4]) == [0x98, 0xBA, 0xDC, 0xFE]
+    # Check that the last register command is present in the payload
+    assert list(payload[-4:]) == [0xD3, 0xC2, 0xB1, 0xA0]
diff --git a/ethosu/vela/test/testutil.py b/ethosu/vela/test/testutil.py
index 7cdd4f5e..ee407b6e 100644
--- a/ethosu/vela/test/testutil.py
+++ b/ethosu/vela/test/testutil.py
@@ -27,17 +27,7 @@ from ethosu.vela.tensor import Tensor
 
 
 def create_arch():
-    return architecture_features.ArchitectureFeatures(
-        vela_config_files=None,
-        accelerator_config=architecture_features.Accelerator.Ethos_U55_128.value,
-        system_config=architecture_features.ArchitectureFeatures.DEFAULT_CONFIG,
-        memory_mode=architecture_features.ArchitectureFeatures.DEFAULT_CONFIG,
-        override_block_config=None,
-        block_config_limit=None,
-        max_blockdep=0,
-        weight_estimation_scaling=1.0,
-        verbose_config=False,
-    )
+    return architecture_features.create_default_arch(architecture_features.Accelerator.Ethos_U55_128)
 
 
 def default_quant_params():