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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Device CDC_ECM Class */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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#define UX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "ux_api.h" |
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#include "ux_device_class_cdc_ecm.h" |
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#include "ux_device_stack.h" |
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#if !defined(UX_DEVICE_STANDALONE) |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_device_class_cdc_ecm_bulkout_thread PORTABLE C */ |
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/* 6.3.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function is the thread of the cdc_ecm bulk out endpoint. It */ |
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/* is waiting for the host to send data on the bulk out endpoint to */ |
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/* the device. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* cdc_ecm_class Address of cdc_ecm class */ |
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/* container */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_device_stack_transfer_request Request transfer */ |
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/* _ux_utility_memory_copy Copy memory */ |
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/* nx_packet_allocate Allocate NetX packet */ |
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/* nx_packet_release Free NetX packet */ |
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/* _ux_device_thread_suspend Suspend thread */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* ThreadX */ |
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/* */ |
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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
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/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
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/* prefixed UX to MS_TO_TICK, */ |
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/* verified memset and memcpy */ |
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/* cases, */ |
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/* resulting in version 6.1 */ |
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/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */ |
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/* refined macros names, */ |
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/* resulting in version 6.1.10 */ |
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/* 04-25-2022 Chaoqiong Xiao Modified comment(s), */ |
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/* fixed standalone compile, */ |
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/* resulting in version 6.1.11 */ |
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/* 10-31-2022 Chaoqiong Xiao Modified comment(s), */ |
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/* fixed EP not ready issue, */ |
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/* used pool from NX IP inst, */ |
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/* used NX API to copy data, */ |
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/* resulting in version 6.2.0 */ |
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/* 10-31-2023 Chaoqiong Xiao Modified comment(s), */ |
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/* added zero copy support, */ |
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/* added a new mode to manage */ |
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/* endpoint buffer in classes, */ |
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/* resulting in version 6.3.0 */ |
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/* */ |
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/**************************************************************************/ |
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VOID _ux_device_class_cdc_ecm_bulkout_thread(ULONG cdc_ecm_class) |
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{ |
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UX_SLAVE_CLASS *class_ptr; |
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UX_SLAVE_CLASS_CDC_ECM *cdc_ecm; |
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UX_SLAVE_DEVICE *device; |
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UX_SLAVE_TRANSFER *transfer_request; |
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UINT status; |
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NX_PACKET *packet; |
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USB_NETWORK_DEVICE_TYPE *ux_nx_device; |
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/* Cast properly the cdc_ecm instance. */ |
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UX_THREAD_EXTENSION_PTR_GET(class_ptr, UX_SLAVE_CLASS, cdc_ecm_class) |
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/* Get the cdc_ecm instance from this class container. */ |
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cdc_ecm = (UX_SLAVE_CLASS_CDC_ECM *) class_ptr -> ux_slave_class_instance; |
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/* Get the pointer to the device. */ |
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device = &_ux_system_slave -> ux_system_slave_device; |
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/* This thread runs forever but can be suspended or resumed. */ |
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while (1) |
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{ |
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/* As long as the device is in the CONFIGURED state. */ |
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✓✓ |
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while (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED) |
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{ |
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/* Check if packet pool is ready. */ |
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✓✓ |
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if (cdc_ecm -> ux_slave_class_cdc_ecm_packet_pool == UX_NULL) |
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{ |
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/* Get the network device handle. */ |
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ux_nx_device = (USB_NETWORK_DEVICE_TYPE *)(cdc_ecm -> ux_slave_class_cdc_ecm_network_handle); |
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/* Get packet pool from IP instance (if available). */ |
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✓✓ |
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if (ux_nx_device -> ux_network_device_ip_instance != UX_NULL) |
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{ |
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cdc_ecm -> ux_slave_class_cdc_ecm_packet_pool = ux_nx_device -> ux_network_device_ip_instance -> nx_ip_default_packet_pool; |
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} |
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else |
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{ |
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/* Error trap. */ |
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_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CLASS_ETH_PACKET_POOL_ERROR); |
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_ux_utility_delay_ms(UX_DEVICE_CLASS_CDC_ECM_PACKET_POOL_INST_WAIT); |
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continue; |
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} |
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} |
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/* Check if Bulk OUT endpoint is ready. */ |
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✓✓ |
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if (cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_endpoint == UX_NULL) |
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{ |
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_ux_utility_delay_ms(UX_DEVICE_CLASS_CDC_ECM_LINK_CHECK_WAIT); |
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continue; |
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} |
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/* We can accept new reception. Get a NX Packet */ |
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status = nx_packet_allocate(cdc_ecm -> ux_slave_class_cdc_ecm_packet_pool, &packet, |
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NX_RECEIVE_PACKET, UX_MS_TO_TICK(UX_DEVICE_CLASS_CDC_ECM_PACKET_POOL_WAIT)); |
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✓✓ |
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if (status == NX_SUCCESS) |
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{ |
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/* Select the transfer request associated with BULK OUT endpoint. */ |
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transfer_request = &cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_endpoint -> ux_slave_endpoint_transfer_request; |
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/* And length. */ |
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transfer_request -> ux_slave_transfer_request_requested_length = UX_DEVICE_CLASS_CDC_ECM_BULKOUT_BUFFER_SIZE; |
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transfer_request -> ux_slave_transfer_request_actual_length = 0; |
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/* Memorize this packet at the beginning of the queue. */ |
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cdc_ecm -> ux_slave_class_cdc_ecm_receive_queue = packet; |
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/* Reset the queue pointer of this packet. */ |
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packet -> nx_packet_queue_next = UX_NULL; |
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#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && defined(UX_DEVICE_CLASS_CDC_ECM_ZERO_COPY) |
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/* Send the request to the device controller. */ |
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transfer_request -> ux_slave_transfer_request_data_pointer = packet -> nx_packet_prepend_ptr + sizeof(USHORT); |
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status = _ux_device_stack_transfer_request(transfer_request, |
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packet -> nx_packet_pool_owner -> nx_packet_pool_payload_size - sizeof(USHORT), |
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packet -> nx_packet_pool_owner -> nx_packet_pool_payload_size - sizeof(USHORT)); |
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#else |
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/* Send the request to the device controller. */ |
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status = _ux_device_stack_transfer_request(transfer_request, UX_DEVICE_CLASS_CDC_ECM_BULKOUT_BUFFER_SIZE, |
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UX_DEVICE_CLASS_CDC_ECM_BULKOUT_BUFFER_SIZE); |
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#endif |
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/* Check the completion code. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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{ |
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/* We only proceed with packets that are received OK, if error, ignore the packet. */ |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_CDC_ECM_PACKET_RECEIVE, cdc_ecm, 0, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0) |
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/* Adjust the prepend pointer to take into account the non 3 bit alignment of the ethernet header. */ |
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packet -> nx_packet_prepend_ptr += sizeof(USHORT); |
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packet -> nx_packet_append_ptr += sizeof(USHORT); |
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#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && defined(UX_DEVICE_CLASS_CDC_ECM_ZERO_COPY) |
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/* Data already in packet. */ |
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packet -> nx_packet_length = transfer_request -> ux_slave_transfer_request_actual_length; |
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/* Send that packet to the NetX USB broker. */ |
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_ux_network_driver_packet_received(cdc_ecm -> ux_slave_class_cdc_ecm_network_handle, packet); |
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#else |
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/* Copy the received packet in the IP packet data area. */ |
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status = nx_packet_data_append(packet, |
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transfer_request -> ux_slave_transfer_request_data_pointer, |
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transfer_request -> ux_slave_transfer_request_actual_length, |
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cdc_ecm -> ux_slave_class_cdc_ecm_packet_pool, |
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UX_MS_TO_TICK(UX_DEVICE_CLASS_CDC_ECM_PACKET_POOL_WAIT)); |
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✓✓ |
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if (status == NX_SUCCESS) |
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{ |
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/* Send that packet to the NetX USB broker. */ |
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_ux_network_driver_packet_received(cdc_ecm -> ux_slave_class_cdc_ecm_network_handle, packet); |
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} |
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else |
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{ |
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/* We received a malformed packet. Report to application. */ |
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_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CLASS_MALFORMED_PACKET_RECEIVED_ERROR); |
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nx_packet_release(packet); |
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} |
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#endif |
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} |
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else |
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/* Free the packet that was not successfully received. */ |
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nx_packet_release(packet); |
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} |
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else |
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{ |
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/* Packet allocation timed out. Note that the timeout value is |
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configurable. */ |
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/* Error trap. No need for trace, since NetX does it. */ |
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_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_MEMORY_INSUFFICIENT); |
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} |
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} |
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/* We need to suspend ourselves. We will be resumed by the device enumeration module. */ |
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_ux_device_thread_suspend(&cdc_ecm -> ux_slave_class_cdc_ecm_bulkout_thread); |
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} |
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} |
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#endif |