Qualcomm AI Engine Direct - add cli tool for QNN artifacts

Summary:
- cli tool for deploying precompiled model library / context bin
  onto executorch runtime
- refactor & mionr fixes

backends/qualcomm/aot/python/PyQnnWrapperAdaptor.h

@@ -171,7 +171,7 @@ class PyQnnTensorWrapper {
         return {enc_data, data.axis};
       }
       default:
-        QNN_EXECUTORCH_LOG_ERROR(
+        QNN_EXECUTORCH_LOG_WARN(
             "%s QNN_QUANTIZATION_ENCODING_UNDEFINED detected",
             GetName().c_str());
         break;

backends/qualcomm/tests/test_qnn_delegate.py

@@ -3,6 +3,7 @@
 #
 # This source code is licensed under the BSD-style license found in the
 # LICENSE file in the root directory of this source tree.
+import io
 import json
 import subprocess
 import sys
@@ -1825,6 +1826,96 @@ def required_envs(self, conditions=None) -> bool:
             ]
         )
 
+    def test_utils_export(self):
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            module = ContextBinaryExample()  # noqa: F405
+            generate_context_binary(
+                module=module,
+                inputs=module.example_inputs(),
+                quantized=True,
+                artifact_dir=tmp_dir,
+            )
+            ctx_path = f"{tmp_dir}/model_ctx.bin"
+            fpath = f"{self.executorch_root}/examples/qualcomm/qaihub_scripts/utils/export.py"
+
+            # do compilation
+            compile_cmds = [
+                "python",
+                fpath,
+                "compile",
+                "-a",
+                ctx_path,
+                "-m",
+                self.model,
+                "-l",
+                "False",
+                "-b",
+                self.build_folder,
+                "-o",
+                f"{tmp_dir}/output_pte",
+            ]
+            compile_process = subprocess.Popen(
+                compile_cmds, stdout=subprocess.DEVNULL, cwd=self.executorch_root
+            )
+            output_pte_dir = f"{tmp_dir}/output_pte/model_ctx"
+            compile_process.communicate()
+
+            # check artifacts are correctly generated
+            self.assertTrue(
+                all(
+                    [
+                        Path(output_pte_dir).exists(),
+                        Path(f"{output_pte_dir}/model_ctx.json").exists(),
+                        Path(f"{output_pte_dir}/model_ctx.svg").exists(),
+                    ]
+                )
+            )
+
+            # prepare input files
+            input_list, inputs = [], module.example_inputs()
+            for name, tensor in inputs.items():
+                tensor_path = f"{output_pte_dir}/{name}.pt"
+                torch.save(tensor, tensor_path)
+                input_list.append(tensor_path)
+
+            # do execution
+            output_data_dir = f"{tmp_dir}/output_data"
+            execute_cmds = [
+                "python",
+                fpath,
+                "execute",
+                "-p",
+                output_pte_dir,
+                "-i",
+                *input_list,
+                "-s",
+                self.device,
+                "-z",
+                "-b",
+                self.build_folder,
+                "-o",
+                output_data_dir,
+            ]
+            if self.host is not None:
+                execute_cmds.append(f"-H {self.host}")
+            execute_process = subprocess.Popen(execute_cmds, cwd=self.executorch_root)
+            execute_process.communicate()
+
+            # read outputs
+            with open(f"{output_pte_dir}/model_ctx.json", "r") as f:
+                graph_info = json.load(f)
+
+            device_output = []
+            for output in graph_info["outputs"]:
+                with open(f"{output_data_dir}/{output['name']}.pt", "rb") as f:
+                    buffer = io.BytesIO(f.read())
+                    device_output.append(torch.load(buffer, weights_only=False))
+
+            # validate outputs
+            golden_output = module.forward(inputs["x"], inputs["y"])
+            self.atol, self.rtol = 1e-1, 1
+            self._assert_outputs_equal(golden_output, device_output)
+
     def test_llama2_7b(self):
         if not self.required_envs():
             self.skipTest("missing required envs")

backends/qualcomm/utils/utils.py

@@ -232,7 +232,9 @@ def capture_program(
     return edge_ep
 
 
-def from_context_binary(ctx_path: str, op_name: str):
+def from_context_binary(
+    ctx_path: str, op_name: str, soc_model: QcomChipset = QcomChipset.SM8650
+):
     def implement_op(custom_op, op_name, outputs):
         @torch.library.impl(
             custom_op, str(op_name), dispatch_key="CompositeExplicitAutograd"
@@ -283,7 +285,7 @@ def build_tensor(tensors, dtype_map):
     # dummy compiler spec would be fine, since we're not compiling
     backend_options = generate_htp_compiler_spec(use_fp16=False)
     compiler_specs = generate_qnn_executorch_compiler_spec(
-        soc_model=QcomChipset.SM8650,
+        soc_model=soc_model,
         backend_options=backend_options,
         is_from_context_binary=True,
     )

examples/qualcomm/qaihub_scripts/utils/README.md

@@ -0,0 +1,102 @@
+# CLI Tool for Compile / Deploy Pre-Built QNN Artifacts
+
+An easy-to-use tool for generating / executing .pte program from pre-built model libraries / context binaries from Qualcomm AI Engine Direct. Tool is verified with [host environement](../../../../docs/source/build-run-qualcomm-ai-engine-direct-backend.md#host-os).
+
+## Description
+
+This tool aims for users who want to leverage ExecuTorch runtime framework with their existent artifacts generated by QNN. It's possible for them to produce .pte program in few steps.<br/>
+If users are interested in well-known applications, [Qualcomm AI HUB](https://aihub.qualcomm.com/) is a great approach which provides tons of optimized state-of-the-art models ready for deploying. All of them could be downloaded in model library or context binary format.
+
+* Model libraries(.so) came from `qnn-model-lib-generator` | AI HUB, or context binaries(.bin) came from `qnn-context-binary-generator` | AI HUB, could apply tool directly with:
+  - To produce .pte program:
+    ```bash
+    $ python export.py compile
+    ```
+  - To perform inference with generated .pte program:
+    ```bash
+    $ python export.py execute
+    ```
+
+### Dependencies
+
+* Register for Qualcomm AI HUB.
+* Download the corresponding QNN SDK via shit [link](https://www.qualcomm.com/developer/software/qualcomm-ai-engine-direct-sdk) which your favorite model is compiled with. Ths link will automatically download the latest version at this moment (users should be able to specify version soon, please refer to [this](../../../../docs/source/build-run-qualcomm-ai-engine-direct-backend.md#software) for earlier releases).
+
+### Target Model
+
+* Consider using [virtual environment](https://app.aihub.qualcomm.com/docs/hub/getting_started.html) for AI HUB scripts to prevent package conflict against ExecuTorch. Please finish the [installation section](https://app.aihub.qualcomm.com/docs/hub/getting_started.html#installation) before proceeding following steps.
+* Take [QuickSRNetLarge-Quantized](https://aihub.qualcomm.com/models/quicksrnetlarge_quantized?searchTerm=quantized) as an example, please [install](https://huggingface.co/qualcomm/QuickSRNetLarge-Quantized#installation) package as instructed.
+* Create workspace and export pre-built model library:
+  ```bash
+  mkdir $MY_WS && cd $MY_WS
+  # target chipset is `SM8650`
+  python -m qai_hub_models.models.quicksrnetlarge_quantized.export --target-runtime qnn --chipset qualcomm-snapdragon-8gen3
+  ```
+* The compiled model library will be located under `$MY_WS/build/quicksrnetlarge_quantized/quicksrnetlarge_quantized.so`. This model library maps to the artifacts generated by SDK tools mentioned in `Integration workflow` section on [Qualcomm AI Engine Direct document](https://docs.qualcomm.com/bundle/publicresource/topics/80-63442-50/overview.html).
+
+### Compiling Program
+
+* Compile .pte program
+  ```bash
+  # `pip install pydot` if package is missing
+  # Note that device serial & hostname might not be required if given artifacts is in context binary format
+  PYTHONPATH=$EXECUTORCH_ROOT/.. python $EXECUTORCH_ROOT/examples/qualcomm/qaihub_scripts/utils/export.py compile -a $MY_WS/build/quicksrnetlarge_quantized/quicksrnetlarge_quantized.so -m SM8650 -s $DEVICE_SERIAL -b $EXECUTORCH_ROOT/build-android
+  ```
+* Artifacts for checking IO information
+  - `output_pte/quicksrnetlarge_quantized/quicksrnetlarge_quantized.json`
+  - `output_pte/quicksrnetlarge_quantized/quicksrnetlarge_quantized.svg`
+
+### Executing Program
+
+* Prepare test image
+  ```bash
+  cd $MY_WS
+  wget https://user-images.githubusercontent.com/12981474/40157448-eff91f06-5953-11e8-9a37-f6b5693fa03f.png -O baboon.png
+  ```
+  Execute following python script to generate input data:
+  ```python
+  import torch
+  import torchvision.transforms as transforms
+  from PIL import Image
+  img = Image.open('baboon.png').resize((128, 128))
+  transform = transforms.Compose([transforms.PILToTensor()])
+  # convert (C, H, W) to (N, H, W, C)
+  # IO tensor info. could be checked with quicksrnetlarge_quantized.json | .svg
+  img = transform(img).permute(1, 2, 0).unsqueeze(0)
+  torch.save(img, 'baboon.pt')
+  ```
+* Execute .pte program
+  ```bash
+  PYTHONPATH=$EXECUTORCH_ROOT/.. python $EXECUTORCH_ROOT/examples/qualcomm/qaihub_scripts/utils/export.py execute -p output_pte/quicksrnetlarge_quantized -i baboon.pt -s $DEVICE_SERIAL -b $EXECUTORCH_ROOT/build-android
+  ```
+* Post-process generated data
+  ```bash
+  cd output_data
+  ```
+  Execute following python script to generate output image:
+  ```python
+  import io
+  import torch
+  import torchvision.transforms as transforms
+  # IO tensor info. could be checked with quicksrnetlarge_quantized.json | .svg
+  # generally we would have same layout for input / output tensors: e.g. either NHWC or NCHW
+  # this might not be true under different converter configurations
+  # learn more with converter tool from Qualcomm AI Engine Direct documentation
+  # https://docs.qualcomm.com/bundle/publicresource/topics/80-63442-50/tools.html#model-conversion
+  with open('output__142.pt', 'rb') as f:
+      buffer = io.BytesIO(f.read())
+  img = torch.load(buffer, weights_only=False)
+  transform = transforms.Compose([transforms.ToPILImage()])
+  img_pil = transform(img.squeeze(0))
+  img_pil.save('baboon_upscaled.png')
+  ```
+  You could check the upscaled result now!
+
+## Help
+
+Please check help messages for more information:
+```bash
+PYTHONPATH=$EXECUTORCH_ROOT/.. python $EXECUTORCH_ROOT/examples/qualcomm/aihub/utils/export.py -h
+PYTHONPATH=$EXECUTORCH_ROOT/.. python $EXECUTORCH_ROOT/examples/qualcomm/aihub/utils/python export.py compile -h
+PYTHONPATH=$EXECUTORCH_ROOT/.. python $EXECUTORCH_ROOT/examples/qualcomm/aihub/utils/python export.py execute -h
+```