Add driver async API
Add an asynchronous API to the driver. The current synchronous API
is now using the new async API internally. The main new functions
are ethosu_invoke_async() and ethosu_wait(). Every successfull call
to ethosu_invoke_async() must be followed by a call to ethosu_wait()
to get the status of the inference. The wait function can be called
in a blocking or non-blocking mode by specifying the `block`
argument to true/false. The regular synchronous invoke function is
implemented as a invoke_async followed by a wait(block=true) call.
Short sommary of changes:
- Add an internal ethosu_job struct to keep track of
inference data and job state.
- Use async API in blocking mode for normal flow
- Change default semaphore implementation to binary type
- Move error prints out of interrupt context
- Move ethosu_inference_begin() callback to right before HW invoke
- Always call ethosu_inference_end() callback, even in case of errors
- On NPU error, do not keep NPU powered after being reset
Change-Id: If4c3c46e3c6732a669e17251bd848dea5765a490
diff --git a/src/ethosu_device.h b/src/ethosu_device.h
index cc9ea8b..0b45fd6 100644
--- a/src/ethosu_device.h
+++ b/src/ethosu_device.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2019-2021 Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2022 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
@@ -81,13 +81,17 @@
* - All input tensors
* - All output tensors
* \param[in] num_base_addr Number of base addresses.
- * \return \ref ethosu_error_codes
*/
-enum ethosu_error_codes ethosu_dev_run_command_stream(struct ethosu_device *dev,
- const uint8_t *cmd_stream_ptr,
- uint32_t cms_length,
- const uint64_t *base_addr,
- int num_base_addr);
+void ethosu_dev_run_command_stream(struct ethosu_device *dev,
+ const uint8_t *cmd_stream_ptr,
+ uint32_t cms_length,
+ const uint64_t *base_addr,
+ int num_base_addr);
+
+/**
+ * Print information on NPU error status
+ */
+void ethosu_dev_print_err_status(struct ethosu_device *dev);
/**
* Interrupt handler on device layer