Add Arm(R) Ethos(TM)-U codegen support on tvmc

* Include `ethos-u` as a new target for tvmc
* Adds testing for the new target

Co-authored-by: Manupa Karunaratne <manupa.karunaratne@arm.com>

python/tvm/driver/tvmc/composite_target.py

@@ -24,6 +24,7 @@
 
 from tvm.relay.op.contrib.arm_compute_lib import partition_for_arm_compute_lib
 from tvm.relay.op.contrib.ethosn import partition_for_ethosn
+from tvm.relay.backend.contrib.ethosu import partition_for_ethosu
 from tvm.relay.op.contrib.bnns import partition_for_bnns
 from tvm.relay.op.contrib.vitis_ai import partition_for_vitis_ai
 
@@ -53,6 +54,10 @@
         "config_key": "relay.ext.ethos-n.options",
         "pass_pipeline": partition_for_ethosn,
     },
+    "ethos-u": {
+        "config_key": "relay.ext.ethosu.options",
+        "pass_pipeline": partition_for_ethosu,
+    },
     "bnns": {
         "config_key": None,
         "pass_pipeline": partition_for_bnns,

tests/python/driver/tvmc/test_compiler.py

@@ -15,7 +15,9 @@
 # specific language governing permissions and limitations
 # under the License.
 import os
+import re
 import shutil
+import tarfile
 from os import path
 
 from unittest import mock
@@ -331,6 +333,40 @@ def test_compile_tflite_module_with_external_codegen_vitis_ai(tflite_mobilenet_v
     assert os.path.exists(dumps_path)
 
 
+def test_compile_tflite_module_with_external_codegen_ethosu(
+    tmpdir_factory, tflite_mobilenet_v1_1_quant
+):
+    pytest.importorskip("tflite")
+    ACCEL_TYPES = ["ethos-u55-256", "ethos-u55-128", "ethos-u55-64", "ethos-u55-32"]
+
+    output_dir = tmpdir_factory.mktemp("mlf")
+
+    tvmc_model = tvmc.load(tflite_mobilenet_v1_1_quant)
+
+    for accel_type in ACCEL_TYPES:
+        output_file_name = f"{output_dir}/file_{accel_type}.tar"
+
+        tvmc_package = tvmc.compiler.compile_model(
+            tvmc_model,
+            target=f"ethos-u -accelerator_config={accel_type}, c -runtime=c --system-lib --link-params -mcpu=cortex-m55 --executor=aot",
+            output_format="mlf",
+            package_path=output_file_name,
+            pass_context_configs=["tir.disable_vectorize=true"],
+        )
+
+        # check whether an MLF package was created
+        assert os.path.exists(output_file_name)
+
+        # check whether the expected number of C sources are in the tarfile
+        with tarfile.open(output_file_name) as mlf_package:
+            c_source_files = [
+                name
+                for name in mlf_package.getnames()
+                if re.match(r"\./codegen/host/src/\D+\d+\.c", name)
+            ]
+            assert len(c_source_files) == 17
+
+
 @mock.patch("tvm.relay.build")
 @mock.patch("tvm.driver.tvmc.composite_target.get_codegen_by_target")
 @mock.patch("tvm.driver.tvmc.load")