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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	core/src/ux_device_stack_transfer_request.c	Lines:	31	31	100.0 %
Date:	2026-03-06 18:57:10	Branches:	22	22	100.0 %


/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** USBX Component                                                        */
/**                                                                       */
/**   Device Stack                                                        */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define UX_SOURCE_CODE


/* Include necessary system files.  */

#include "ux_api.h"
#include "ux_device_stack.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_device_stack_transfer_request                   PORTABLE C      */
/*                                                           6.1.10       */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function performs a USB transaction. On entry the              */
/*    transfer request gives the endpoint pipe selected for this          */
/*    transaction and the parameters associated with the transfer         */
/*    (data payload, length of transaction).                              */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    transfer_request                      Pointer to transfer request   */
/*    slave_length                          Length returned by host       */
/*    host_length                           Length asked by host          */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    (ux_slave_dcd_function)               Slave DCD dispatch function   */
/*    _ux_utility_delay_ms                  Delay ms                      */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*    Device Stack                                                        */
/*                                                                        */
/**************************************************************************/
UINT  _ux_device_stack_transfer_request(UX_SLAVE_TRANSFER *transfer_request,
                                            ULONG slave_length,
                                            ULONG host_length)
{
#if defined(UX_DEVICE_STANDALONE)
UINT            status;

    /* Start a transfer request without waiting it end.  */
    UX_SLAVE_TRANSFER_STATE_RESET(transfer_request);
    status = _ux_device_stack_transfer_run(transfer_request, slave_length, host_length);
    if (status == UX_STATE_LOCK)
        return(UX_BUSY);
    if (status < UX_STATE_NEXT)
        return(transfer_request -> ux_slave_transfer_request_completion_code);

    /* Started/done, things will be done in BG  */
    return(UX_SUCCESS);
#else
UX_INTERRUPT_SAVE_AREA

UX_SLAVE_DCD            *dcd;
UINT                    status;
UX_SLAVE_ENDPOINT       *endpoint;
ULONG                   device_state;


    /* Do we have to skip this transfer?  */
    if (transfer_request -> ux_slave_transfer_request_status_phase_ignore == UX_TRUE)
        return(UX_SUCCESS);

    /* Disable interrupts to prevent the disconnection ISR from preempting us
       while we check the device state and set the transfer status.  */
    UX_DISABLE

    /* Get the device state.  */
    device_state =  _ux_system_slave -> ux_system_slave_device.ux_slave_device_state;

    /* We can only transfer when the device is ATTACHED, ADDRESSED OR CONFIGURED.  */
    if ((device_state == UX_DEVICE_ATTACHED) || (device_state == UX_DEVICE_ADDRESSED)
            || (device_state == UX_DEVICE_CONFIGURED))

        /* Set the transfer to pending.  */
        transfer_request -> ux_slave_transfer_request_status =  UX_TRANSFER_STATUS_PENDING;

    else
    {

        /* The device is in an invalid state. Restore interrupts and return error.  */
        UX_RESTORE
        return(UX_TRANSFER_NOT_READY);
    }

    /* Restore interrupts.  */
    UX_RESTORE

    /* If trace is enabled, insert this event into the trace buffer.  */
    UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_TRANSFER_REQUEST, transfer_request, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)

    /* Get the pointer to the DCD.  */
    dcd =  &_ux_system_slave -> ux_system_slave_dcd;

    /* Get the endpoint associated with this transaction.  */
    endpoint =  transfer_request -> ux_slave_transfer_request_endpoint;

    /* If the endpoint is non Control, check the endpoint direction and set the data phase direction.  */
    if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) != UX_CONTROL_ENDPOINT)
    {

        /* Check if the endpoint is STALLED. In this case, we must refuse the transaction until the endpoint
           has been reset by the host.  */
        while (endpoint -> ux_slave_endpoint_state == UX_ENDPOINT_HALTED)

            /* Wait for 100ms for endpoint to be reset by a CLEAR_FEATURE command.  */
            _ux_utility_delay_ms(100);

        /* Isolate the direction from the endpoint address.  */
        if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) == UX_ENDPOINT_IN)
            transfer_request -> ux_slave_transfer_request_phase =  UX_TRANSFER_PHASE_DATA_OUT;
        else
            transfer_request -> ux_slave_transfer_request_phase =  UX_TRANSFER_PHASE_DATA_IN;
    }

    /* See if we need to force a zero length packet at the end of the transfer.
       This happens on a DATA IN and when the host requested length is not met
       and the last packet is on a boundary. If slave_length is zero, then it is
       a explicit ZLP request, no need to force ZLP.  */
    if ((transfer_request -> ux_slave_transfer_request_phase ==  UX_TRANSFER_PHASE_DATA_OUT) &&
        (slave_length != 0) && (host_length != slave_length) &&
        (slave_length % endpoint -> ux_slave_endpoint_descriptor.wMaxPacketSize) == 0)
    {

        /* If so force Zero Length Packet.  */
        transfer_request -> ux_slave_transfer_request_force_zlp =  UX_TRUE;
    }
    else
    {

        /* Condition is not met, do not force a Zero Length Packet.  */
        transfer_request -> ux_slave_transfer_request_force_zlp =  UX_FALSE;
    }

    /* Reset the number of bytes sent/received.  */
    transfer_request -> ux_slave_transfer_request_actual_length =  0;

    /* Determine how many bytes to send in this transaction.  We keep track of the original
        length and have a working length.  */
    transfer_request -> ux_slave_transfer_request_requested_length =    slave_length;
    transfer_request -> ux_slave_transfer_request_in_transfer_length =  slave_length;

    /* Save the buffer pointer.  */
    transfer_request -> ux_slave_transfer_request_current_data_pointer =
                            transfer_request -> ux_slave_transfer_request_data_pointer;

    /* Call the DCD driver transfer function.   */
    status =  dcd -> ux_slave_dcd_function(dcd, UX_DCD_TRANSFER_REQUEST, transfer_request);

    /* And return the status.  */
    return(status);

#endif
}



Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/***************************************************************************
2			* Copyright (c) 2024 Microsoft Corporation
3			* Copyright (c) 2026-present Eclipse ThreadX contributors
4			*
5			* This program and the accompanying materials are made available under the
6			* terms of the MIT License which is available at
7			* https://opensource.org/licenses/MIT.
8			*
9			* SPDX-License-Identifier: MIT
10			**************************************************************************/
11
12
13			/**************************************************************************/
14			/**************************************************************************/
15			/** */
16			/** USBX Component */
17			/** */
18			/** Device Stack */
19			/** */
20			/**************************************************************************/
21			/**************************************************************************/
22
23			#define UX_SOURCE_CODE
24
25
26			/* Include necessary system files. */
27
28			#include "ux_api.h"
29			#include "ux_device_stack.h"
30
31
32			/**************************************************************************/
33			/* */
34			/* FUNCTION RELEASE */
35			/* */
36			/* _ux_device_stack_transfer_request PORTABLE C */
37			/* 6.1.10 */
38			/* AUTHOR */
39			/* */
40			/* Chaoqiong Xiao, Microsoft Corporation */
41			/* */
42			/* DESCRIPTION */
43			/* */
44			/* This function performs a USB transaction. On entry the */
45			/* transfer request gives the endpoint pipe selected for this */
46			/* transaction and the parameters associated with the transfer */
47			/* (data payload, length of transaction). */
48			/* */
49			/* INPUT */
50			/* */
51			/* transfer_request Pointer to transfer request */
52			/* slave_length Length returned by host */
53			/* host_length Length asked by host */
54			/* */
55			/* OUTPUT */
56			/* */
57			/* Completion Status */
58			/* */
59			/* CALLS */
60			/* */
61			/* (ux_slave_dcd_function) Slave DCD dispatch function */
62			/* _ux_utility_delay_ms Delay ms */
63			/* */
64			/* CALLED BY */
65			/* */
66			/* Application */
67			/* Device Stack */
68			/* */
69			/**************************************************************************/
70		21000	UINT _ux_device_stack_transfer_request(UX_SLAVE_TRANSFER *transfer_request,
71			ULONG slave_length,
72			ULONG host_length)
73			{
74			#if defined(UX_DEVICE_STANDALONE)
75			UINT status;
76
77			/* Start a transfer request without waiting it end. */
78			UX_SLAVE_TRANSFER_STATE_RESET(transfer_request);
79			status = _ux_device_stack_transfer_run(transfer_request, slave_length, host_length);
80			if (status == UX_STATE_LOCK)
81			return(UX_BUSY);
82			if (status < UX_STATE_NEXT)
83			return(transfer_request -> ux_slave_transfer_request_completion_code);
84
85			/* Started/done, things will be done in BG */
86			return(UX_SUCCESS);
87			#else
88			UX_INTERRUPT_SAVE_AREA
89
90			UX_SLAVE_DCD *dcd;
91			UINT status;
92			UX_SLAVE_ENDPOINT *endpoint;
93			ULONG device_state;
94
95
96			/* Do we have to skip this transfer? */
97	✓✓	21000	if (transfer_request -> ux_slave_transfer_request_status_phase_ignore == UX_TRUE)
98		1	return(UX_SUCCESS);
99
100			/* Disable interrupts to prevent the disconnection ISR from preempting us
101			while we check the device state and set the transfer status. */
102		20999	UX_DISABLE
103
104			/* Get the device state. */
105		20999	device_state = _ux_system_slave -> ux_system_slave_device.ux_slave_device_state;
106
107			/* We can only transfer when the device is ATTACHED, ADDRESSED OR CONFIGURED. */
108	✓✓✓✓	20999	if ((device_state == UX_DEVICE_ATTACHED) \|\| (device_state == UX_DEVICE_ADDRESSED)
109	✓✓	16764	\|\| (device_state == UX_DEVICE_CONFIGURED))
110
111			/* Set the transfer to pending. */
112		20996	transfer_request -> ux_slave_transfer_request_status = UX_TRANSFER_STATUS_PENDING;
113
114			else
115			{
116
117			/* The device is in an invalid state. Restore interrupts and return error. */
118		3	UX_RESTORE
119		3	return(UX_TRANSFER_NOT_READY);
120			}
121
122			/* Restore interrupts. */
123		20996	UX_RESTORE
124
125			/* If trace is enabled, insert this event into the trace buffer. */
126			UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_TRANSFER_REQUEST, transfer_request, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
127
128			/* Get the pointer to the DCD. */
129		20996	dcd = &_ux_system_slave -> ux_system_slave_dcd;
130
131			/* Get the endpoint associated with this transaction. */
132		20996	endpoint = transfer_request -> ux_slave_transfer_request_endpoint;
133
134			/* If the endpoint is non Control, check the endpoint direction and set the data phase direction. */
135	✓✓	20996	if ((endpoint -> ux_slave_endpoint_descriptor.bmAttributes & UX_MASK_ENDPOINT_TYPE) != UX_CONTROL_ENDPOINT)
136			{
137
138			/* Check if the endpoint is STALLED. In this case, we must refuse the transaction until the endpoint
139			has been reset by the host. */
140	✓✓	15099	while (endpoint -> ux_slave_endpoint_state == UX_ENDPOINT_HALTED)
141
142			/* Wait for 100ms for endpoint to be reset by a CLEAR_FEATURE command. */
143		230	_ux_utility_delay_ms(100);
144
145			/* Isolate the direction from the endpoint address. */
146	✓✓	14869	if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) == UX_ENDPOINT_IN)
147		7813	transfer_request -> ux_slave_transfer_request_phase = UX_TRANSFER_PHASE_DATA_OUT;
148			else
149		7056	transfer_request -> ux_slave_transfer_request_phase = UX_TRANSFER_PHASE_DATA_IN;
150			}
151
152			/* See if we need to force a zero length packet at the end of the transfer.
153			This happens on a DATA IN and when the host requested length is not met
154			and the last packet is on a boundary. If slave_length is zero, then it is
155			a explicit ZLP request, no need to force ZLP. */
156	✓✓✓✓	20995	if ((transfer_request -> ux_slave_transfer_request_phase == UX_TRANSFER_PHASE_DATA_OUT) &&
157	✓✓	13881	(slave_length != 0) && (host_length != slave_length) &&
158	✓✓	2310	(slave_length % endpoint -> ux_slave_endpoint_descriptor.wMaxPacketSize) == 0)
159			{
160
161			/* If so force Zero Length Packet. */
162		5	transfer_request -> ux_slave_transfer_request_force_zlp = UX_TRUE;
163			}
164			else
165			{
166
167			/* Condition is not met, do not force a Zero Length Packet. */
168		20990	transfer_request -> ux_slave_transfer_request_force_zlp = UX_FALSE;
169			}
170
171			/* Reset the number of bytes sent/received. */
172		20995	transfer_request -> ux_slave_transfer_request_actual_length = 0;
173
174			/* Determine how many bytes to send in this transaction. We keep track of the original
175			length and have a working length. */
176		20995	transfer_request -> ux_slave_transfer_request_requested_length = slave_length;
177		20995	transfer_request -> ux_slave_transfer_request_in_transfer_length = slave_length;
178
179			/* Save the buffer pointer. */
180		20995	transfer_request -> ux_slave_transfer_request_current_data_pointer =
181		20995	transfer_request -> ux_slave_transfer_request_data_pointer;
182
183			/* Call the DCD driver transfer function. */
184		20995	status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_TRANSFER_REQUEST, transfer_request);
185
186			/* And return the status. */
187		20931	return(status);
188
189			#endif
190			}
191