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/* $Id: UsbTestServiceGadget.cpp $ */
/** @file
* UsbTestServ - Remote USB test configuration and execution server, USB gadget host API.
*/
/*
* Copyright (C) 2016-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/asm.h>
#include <iprt/ctype.h>
#include <iprt/errcore.h>
#include <iprt/mem.h>
#include <iprt/string.h>
#include "UsbTestServiceGadgetInternal.h"
/*********************************************************************************************************************************
* Constants And Macros, Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Internal UTS gadget host instance data.
*/
typedef struct UTSGADGETINT
{
/** Reference counter. */
volatile uint32_t cRefs;
/** Pointer to the gadget class callback table. */
PCUTSGADGETCLASSIF pClassIf;
/** The gadget host handle. */
UTSGADGETHOST hGadgetHost;
/** Class specific instance data - variable in size. */
uint8_t abClassInst[1];
} UTSGADGETINT;
/** Pointer to the internal gadget host instance data. */
typedef UTSGADGETINT *PUTSGADGETINT;
/*********************************************************************************************************************************
* Global variables *
*********************************************************************************************************************************/
/** Known gadget host interfaces. */
static const PCUTSGADGETCLASSIF g_apUtsGadgetClass[] =
{
&g_UtsGadgetClassTest
};
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
/**
* Destroys a gadget instance.
*
* @param pThis The gadget instance.
*/
static void utsGadgetDestroy(PUTSGADGETINT pThis)
{
pThis->pClassIf->pfnTerm((PUTSGADGETCLASSINT)&pThis->abClassInst[0]);
RTMemFree(pThis);
}
DECLHIDDEN(int) utsGadgetCreate(UTSGADGETHOST hGadgetHost, UTSGADGETCLASS enmClass,
PCUTSGADGETCFGITEM paCfg, PUTSGADET phGadget)
{
int rc = VINF_SUCCESS;
PCUTSGADGETCLASSIF pClassIf = NULL;
/* Get the interface. */
for (unsigned i = 0; i < RT_ELEMENTS(g_apUtsGadgetClass); i++)
{
if (g_apUtsGadgetClass[i]->enmClass == enmClass)
{
pClassIf = g_apUtsGadgetClass[i];
break;
}
}
if (RT_LIKELY(pClassIf))
{
PUTSGADGETINT pThis = (PUTSGADGETINT)RTMemAllocZ(RT_UOFFSETOF_DYN(UTSGADGETINT, abClassInst[pClassIf->cbClass]));
if (RT_LIKELY(pThis))
{
pThis->cRefs = 1;
pThis->hGadgetHost = hGadgetHost;
pThis->pClassIf = pClassIf;
rc = pClassIf->pfnInit((PUTSGADGETCLASSINT)&pThis->abClassInst[0], paCfg);
if (RT_SUCCESS(rc))
{
/* Connect the gadget to the host. */
rc = utsGadgetHostGadgetConnect(pThis->hGadgetHost, pThis);
if (RT_SUCCESS(rc))
*phGadget = pThis;
}
else
RTMemFree(pThis);
}
else
rc = VERR_NO_MEMORY;
}
else
rc = VERR_INVALID_PARAMETER;
return rc;
}
DECLHIDDEN(uint32_t) utsGadgetRetain(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, 0);
return ASMAtomicIncU32(&pThis->cRefs);
}
DECLHIDDEN(uint32_t) utsGadgetRelease(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, 0);
uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
if (!cRefs)
utsGadgetDestroy(pThis);
return cRefs;
}
DECLHIDDEN(uint32_t) utsGadgetGetBusId(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
return pThis->pClassIf->pfnGetBusId((PUTSGADGETCLASSINT)&pThis->abClassInst[0]);
}
DECLHIDDEN(uint32_t) utsGadgetGetDevId(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
return 1; /** @todo Current assumption which is true on Linux with dummy_hcd. */
}
DECLHIDDEN(int) utsGadgetConnect(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
int rc = pThis->pClassIf->pfnConnect((PUTSGADGETCLASSINT)&pThis->abClassInst[0]);
if (RT_SUCCESS(rc))
rc = utsGadgetHostGadgetConnect(pThis->hGadgetHost, hGadget);
return rc;
}
DECLHIDDEN(int) utsGadgetDisconnect(UTSGADGET hGadget)
{
PUTSGADGETINT pThis = hGadget;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
int rc = utsGadgetHostGadgetDisconnect(pThis->hGadgetHost, hGadget);
if (RT_SUCCESS(rc))
rc = pThis->pClassIf->pfnDisconnect((PUTSGADGETCLASSINT)&pThis->abClassInst[0]);
return rc;
}
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