[12348] | 1 | /* $Id: DrvHostSerial.cpp 103425 2024-02-19 11:12:14Z vboxsync $ */
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[4748] | 2 | /** @file
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[72073] | 3 | * VBox serial devices: Host serial driver
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[4748] | 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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[4748] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[4748] | 26 | */
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| 27 |
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| 28 |
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| 29 |
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[57358] | 30 | /*********************************************************************************************************************************
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| 31 | * Header Files *
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| 32 | *********************************************************************************************************************************/
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[4748] | 33 | #define LOG_GROUP LOG_GROUP_DRV_HOST_SERIAL
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[35346] | 34 | #include <VBox/vmm/pdm.h>
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[72073] | 35 | #include <VBox/vmm/pdmserialifs.h>
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[4748] | 36 | #include <VBox/err.h>
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| 37 |
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| 38 | #include <VBox/log.h>
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| 39 | #include <iprt/asm.h>
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| 40 | #include <iprt/assert.h>
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[25966] | 41 | #include <iprt/file.h>
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| 42 | #include <iprt/mem.h>
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[37596] | 43 | #include <iprt/pipe.h>
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[4748] | 44 | #include <iprt/semaphore.h>
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[25966] | 45 | #include <iprt/uuid.h>
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[70800] | 46 | #include <iprt/serialport.h>
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[4748] | 47 |
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[35353] | 48 | #include "VBoxDD.h"
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[4748] | 49 |
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| 50 |
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[57358] | 51 | /*********************************************************************************************************************************
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| 52 | * Structures and Typedefs *
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| 53 | *********************************************************************************************************************************/
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[4748] | 54 |
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| 55 | /**
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| 56 | * Char driver instance data.
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[25966] | 57 | *
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[72132] | 58 | * @implements PDMISERIALCONNECTOR
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[4748] | 59 | */
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| 60 | typedef struct DRVHOSTSERIAL
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| 61 | {
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| 62 | /** Pointer to the driver instance structure. */
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| 63 | PPDMDRVINS pDrvIns;
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[72117] | 64 | /** Pointer to the serial port interface of the driver/device above us. */
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| 65 | PPDMISERIALPORT pDrvSerialPort;
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| 66 | /** Our serial interface. */
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| 67 | PDMISERIALCONNECTOR ISerialConnector;
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[70800] | 68 | /** I/O thread. */
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| 69 | PPDMTHREAD pIoThrd;
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| 70 | /** The serial port handle. */
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| 71 | RTSERIALPORT hSerialPort;
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[5004] | 72 | /** the device path */
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| 73 | char *pszDevicePath;
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[83521] | 74 | /** The active config of the serial port. */
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| 75 | RTSERIALPORTCFG Cfg;
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[5004] | 76 |
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[73712] | 77 | /** Flag whether data is available from the device/driver above as notified by the driver. */
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| 78 | volatile bool fAvailWrExt;
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| 79 | /** Internal copy of the flag which gets reset when there is no data anymore. */
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| 80 | bool fAvailWrInt;
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[72117] | 81 | /** Small send buffer. */
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| 82 | uint8_t abTxBuf[16];
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| 83 | /** Amount of data in the buffer. */
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| 84 | size_t cbTxUsed;
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[4993] | 85 |
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[70800] | 86 | /** The read queue. */
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| 87 | uint8_t abReadBuf[256];
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[72117] | 88 | /** Current offset to write to next. */
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| 89 | volatile uint32_t offWrite;
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[70800] | 90 | /** Current offset into the read buffer. */
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[72117] | 91 | volatile uint32_t offRead;
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[72132] | 92 | /** Current amount of data in the buffer. */
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| 93 | volatile size_t cbReadBuf;
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[70800] | 94 |
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[83521] | 95 | /* Flag whether the host device ran into a fatal error condition and I/O is suspended
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| 96 | * until the nuext VM suspend/resume cycle where we will try again. */
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| 97 | volatile bool fIoFatalErr;
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| 98 | /** Event semaphore the I/O thread is waiting on */
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| 99 | RTSEMEVENT hSemEvtIoFatalErr;
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| 100 |
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[4748] | 101 | /** Read/write statistics */
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| 102 | STAMCOUNTER StatBytesRead;
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| 103 | STAMCOUNTER StatBytesWritten;
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| 104 | } DRVHOSTSERIAL, *PDRVHOSTSERIAL;
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| 105 |
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| 106 |
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[72117] | 107 | /*********************************************************************************************************************************
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| 108 | * Global Variables *
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| 109 | *********************************************************************************************************************************/
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[4748] | 110 |
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[72117] | 111 |
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| 112 | /*********************************************************************************************************************************
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| 113 | * Internal Functions *
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| 114 | *********************************************************************************************************************************/
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| 115 |
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| 116 |
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| 117 | /**
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[82865] | 118 | * Resets the read buffer.
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| 119 | *
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| 120 | * @returns Number of bytes which were queued in the read buffer before reset.
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| 121 | * @param pThis The host serial driver instance.
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| 122 | */
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| 123 | DECLINLINE(size_t) drvHostSerialReadBufReset(PDRVHOSTSERIAL pThis)
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| 124 | {
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| 125 | size_t cbOld = ASMAtomicXchgZ(&pThis->cbReadBuf, 0);
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| 126 | ASMAtomicWriteU32(&pThis->offWrite, 0);
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| 127 | ASMAtomicWriteU32(&pThis->offRead, 0);
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| 128 |
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| 129 | return cbOld;
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| 130 | }
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| 131 |
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| 132 |
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| 133 | /**
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[72117] | 134 | * Returns number of bytes free in the read buffer and pointer to the start of the free space
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| 135 | * in the read buffer.
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| 136 | *
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| 137 | * @returns Number of bytes free in the buffer.
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| 138 | * @param pThis The host serial driver instance.
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| 139 | * @param ppv Where to return the pointer if there is still free space.
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| 140 | */
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| 141 | DECLINLINE(size_t) drvHostSerialReadBufGetWrite(PDRVHOSTSERIAL pThis, void **ppv)
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| 142 | {
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| 143 | if (ppv)
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[72132] | 144 | *ppv = &pThis->abReadBuf[pThis->offWrite];
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[72117] | 145 |
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[72132] | 146 | size_t cbFree = sizeof(pThis->abReadBuf) - ASMAtomicReadZ(&pThis->cbReadBuf);
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| 147 | if (cbFree)
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| 148 | cbFree = RT_MIN(cbFree, sizeof(pThis->abReadBuf) - pThis->offWrite);
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| 149 |
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| 150 | return cbFree;
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[72117] | 151 | }
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| 152 |
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| 153 |
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| 154 | /**
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| 155 | * Returns number of bytes used in the read buffer and pointer to the next byte to read.
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| 156 | *
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| 157 | * @returns Number of bytes free in the buffer.
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| 158 | * @param pThis The host serial driver instance.
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| 159 | * @param ppv Where to return the pointer to the next data to read.
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| 160 | */
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| 161 | DECLINLINE(size_t) drvHostSerialReadBufGetRead(PDRVHOSTSERIAL pThis, void **ppv)
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| 162 | {
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| 163 | if (ppv)
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[72132] | 164 | *ppv = &pThis->abReadBuf[pThis->offRead];
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[72117] | 165 |
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[72132] | 166 | size_t cbUsed = ASMAtomicReadZ(&pThis->cbReadBuf);
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| 167 | if (cbUsed)
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| 168 | cbUsed = RT_MIN(cbUsed, sizeof(pThis->abReadBuf) - pThis->offRead);
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| 169 |
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| 170 | return cbUsed;
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[72117] | 171 | }
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| 172 |
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| 173 |
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| 174 | /**
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| 175 | * Advances the write position of the read buffer by the given amount of bytes.
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| 176 | *
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| 177 | * @param pThis The host serial driver instance.
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| 178 | * @param cbAdv Number of bytes to advance.
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| 179 | */
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| 180 | DECLINLINE(void) drvHostSerialReadBufWriteAdv(PDRVHOSTSERIAL pThis, size_t cbAdv)
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| 181 | {
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| 182 | uint32_t offWrite = ASMAtomicReadU32(&pThis->offWrite);
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| 183 | offWrite = (offWrite + cbAdv) % sizeof(pThis->abReadBuf);
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| 184 | ASMAtomicWriteU32(&pThis->offWrite, offWrite);
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[72132] | 185 | ASMAtomicAddZ(&pThis->cbReadBuf, cbAdv);
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[72117] | 186 | }
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| 187 |
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| 188 |
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| 189 | /**
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| 190 | * Advances the read position of the read buffer by the given amount of bytes.
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| 191 | *
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| 192 | * @param pThis The host serial driver instance.
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| 193 | * @param cbAdv Number of bytes to advance.
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| 194 | */
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| 195 | DECLINLINE(void) drvHostSerialReadBufReadAdv(PDRVHOSTSERIAL pThis, size_t cbAdv)
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| 196 | {
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| 197 | uint32_t offRead = ASMAtomicReadU32(&pThis->offRead);
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| 198 | offRead = (offRead + cbAdv) % sizeof(pThis->abReadBuf);
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| 199 | ASMAtomicWriteU32(&pThis->offRead, offRead);
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[72132] | 200 | ASMAtomicSubZ(&pThis->cbReadBuf, cbAdv);
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[72117] | 201 | }
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| 202 |
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| 203 |
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[83521] | 204 | /**
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| 205 | * Wakes up the serial port I/O thread.
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| 206 | *
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| 207 | * @returns VBox status code.
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| 208 | * @param pThis The host serial driver instance.
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| 209 | */
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| 210 | static int drvHostSerialWakeupIoThread(PDRVHOSTSERIAL pThis)
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| 211 | {
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| 212 |
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| 213 | if (RT_UNLIKELY(pThis->fIoFatalErr))
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| 214 | return RTSemEventSignal(pThis->hSemEvtIoFatalErr);
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| 215 |
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| 216 | return RTSerialPortEvtPollInterrupt(pThis->hSerialPort);
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| 217 | }
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| 218 |
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| 219 |
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[4748] | 220 | /* -=-=-=-=- IBase -=-=-=-=- */
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| 221 |
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| 222 | /**
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[25966] | 223 | * @interface_method_impl{PDMIBASE,pfnQueryInterface}
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[4748] | 224 | */
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[25966] | 225 | static DECLCALLBACK(void *) drvHostSerialQueryInterface(PPDMIBASE pInterface, const char *pszIID)
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[4748] | 226 | {
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[25966] | 227 | PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
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| 228 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
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| 229 |
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[25985] | 230 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
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[72117] | 231 | PDMIBASE_RETURN_INTERFACE(pszIID, PDMISERIALCONNECTOR, &pThis->ISerialConnector);
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[25966] | 232 | return NULL;
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[4748] | 233 | }
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| 234 |
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| 235 |
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[72117] | 236 | /* -=-=-=-=- ISerialConnector -=-=-=-=- */
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[4748] | 237 |
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[72117] | 238 | /** @interface_method_impl{PDMISERIALCONNECTOR,pfnDataAvailWrNotify} */
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[73712] | 239 | static DECLCALLBACK(int) drvHostSerialDataAvailWrNotify(PPDMISERIALCONNECTOR pInterface)
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[4748] | 240 | {
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[72117] | 241 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
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[4748] | 242 |
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[72117] | 243 | int rc = VINF_SUCCESS;
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[73712] | 244 | bool fAvailOld = ASMAtomicXchgBool(&pThis->fAvailWrExt, true);
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| 245 | if (!fAvailOld)
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[83521] | 246 | rc = drvHostSerialWakeupIoThread(pThis);
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[4748] | 247 |
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[72117] | 248 | return rc;
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| 249 | }
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| 250 |
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| 251 |
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| 252 | /**
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| 253 | * @interface_method_impl{PDMISERIALCONNECTOR,pfnReadRdr}
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| 254 | */
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| 255 | static DECLCALLBACK(int) drvHostSerialReadRdr(PPDMISERIALCONNECTOR pInterface, void *pvBuf,
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| 256 | size_t cbRead, size_t *pcbRead)
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| 257 | {
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| 258 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
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| 259 | int rc = VINF_SUCCESS;
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| 260 | uint8_t *pbDst = (uint8_t *)pvBuf;
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| 261 | size_t cbReadAll = 0;
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| 262 |
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| 263 | do
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[4748] | 264 | {
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[72117] | 265 | void *pvSrc = NULL;
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[103425] | 266 | size_t cbReadMax = drvHostSerialReadBufGetRead(pThis, &pvSrc);
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| 267 | size_t cbThisRead = RT_MIN(cbReadMax, cbRead);
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[72117] | 268 | if (cbThisRead)
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| 269 | {
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| 270 | memcpy(pbDst, pvSrc, cbThisRead);
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| 271 | cbRead -= cbThisRead;
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| 272 | pbDst += cbThisRead;
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| 273 | cbReadAll += cbThisRead;
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| 274 | drvHostSerialReadBufReadAdv(pThis, cbThisRead);
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| 275 | }
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| 276 | else
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| 277 | break;
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| 278 | } while (cbRead > 0);
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[4748] | 279 |
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[72117] | 280 | *pcbRead = cbReadAll;
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[72132] | 281 | /* Kick the I/O thread if there is nothing to read to recalculate the poll flags. */
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| 282 | if (!drvHostSerialReadBufGetRead(pThis, NULL))
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[83521] | 283 | rc = drvHostSerialWakeupIoThread(pThis);
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[72117] | 284 |
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| 285 | STAM_COUNTER_ADD(&pThis->StatBytesRead, cbReadAll);
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| 286 | return rc;
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[4748] | 287 | }
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| 288 |
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[70800] | 289 |
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[72117] | 290 | /**
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| 291 | * @interface_method_impl{PDMISERIALCONNECTOR,pfnChgParams}
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| 292 | */
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| 293 | static DECLCALLBACK(int) drvHostSerialChgParams(PPDMISERIALCONNECTOR pInterface, uint32_t uBps,
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| 294 | PDMSERIALPARITY enmParity, unsigned cDataBits,
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| 295 | PDMSERIALSTOPBITS enmStopBits)
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[4748] | 296 | {
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[72117] | 297 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
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[4748] | 298 |
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[83521] | 299 | pThis->Cfg.uBaudRate = uBps;
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[4748] | 300 |
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[72117] | 301 | switch (enmParity)
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[33755] | 302 | {
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[72117] | 303 | case PDMSERIALPARITY_EVEN:
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[83521] | 304 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_EVEN;
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[4748] | 305 | break;
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[72117] | 306 | case PDMSERIALPARITY_ODD:
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[83521] | 307 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_ODD;
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[4748] | 308 | break;
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[72117] | 309 | case PDMSERIALPARITY_NONE:
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[83521] | 310 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_NONE;
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[4748] | 311 | break;
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[72117] | 312 | case PDMSERIALPARITY_MARK:
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[83521] | 313 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_MARK;
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[72117] | 314 | break;
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| 315 | case PDMSERIALPARITY_SPACE:
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[83521] | 316 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_SPACE;
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[72117] | 317 | break;
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[4748] | 318 | default:
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[72117] | 319 | AssertMsgFailed(("Unsupported parity setting %d\n", enmParity)); /* Should not happen. */
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[83521] | 320 | pThis->Cfg.enmParity = RTSERIALPORTPARITY_NONE;
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[4748] | 321 | }
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| 322 |
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[33755] | 323 | switch (cDataBits)
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| 324 | {
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[4748] | 325 | case 5:
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[83521] | 326 | pThis->Cfg.enmDataBitCount = RTSERIALPORTDATABITS_5BITS;
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[4748] | 327 | break;
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| 328 | case 6:
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[83521] | 329 | pThis->Cfg.enmDataBitCount = RTSERIALPORTDATABITS_6BITS;
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[4748] | 330 | break;
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| 331 | case 7:
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[83521] | 332 | pThis->Cfg.enmDataBitCount = RTSERIALPORTDATABITS_7BITS;
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[4748] | 333 | break;
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| 334 | case 8:
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[83521] | 335 | pThis->Cfg.enmDataBitCount = RTSERIALPORTDATABITS_8BITS;
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[4748] | 336 | break;
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| 337 | default:
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[70800] | 338 | AssertMsgFailed(("Unsupported data bit count %u\n", cDataBits)); /* Should not happen. */
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[83521] | 339 | pThis->Cfg.enmDataBitCount = RTSERIALPORTDATABITS_8BITS;
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[4748] | 340 | }
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| 341 |
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[72117] | 342 | switch (enmStopBits)
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| 343 | {
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| 344 | case PDMSERIALSTOPBITS_ONE:
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[83521] | 345 | pThis->Cfg.enmStopBitCount = RTSERIALPORTSTOPBITS_ONE;
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[72117] | 346 | break;
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| 347 | case PDMSERIALSTOPBITS_ONEPOINTFIVE:
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[83521] | 348 | pThis->Cfg.enmStopBitCount = RTSERIALPORTSTOPBITS_ONEPOINTFIVE;
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[72117] | 349 | break;
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| 350 | case PDMSERIALSTOPBITS_TWO:
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[83521] | 351 | pThis->Cfg.enmStopBitCount = RTSERIALPORTSTOPBITS_TWO;
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[72117] | 352 | break;
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| 353 | default:
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| 354 | AssertMsgFailed(("Unsupported stop bit count %d\n", enmStopBits)); /* Should not happen. */
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[83521] | 355 | pThis->Cfg.enmStopBitCount = RTSERIALPORTSTOPBITS_ONE;
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[72117] | 356 | }
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| 357 |
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[83521] | 358 | return RTSerialPortCfgSet(pThis->hSerialPort, &pThis->Cfg, NULL);
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[72117] | 359 | }
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| 360 |
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| 361 |
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| 362 | /**
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| 363 | * @interface_method_impl{PDMISERIALCONNECTOR,pfnChgModemLines}
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| 364 | */
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| 365 | static DECLCALLBACK(int) drvHostSerialChgModemLines(PPDMISERIALCONNECTOR pInterface, bool fRts, bool fDtr)
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| 366 | {
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| 367 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
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| 368 |
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| 369 | uint32_t fClear = 0;
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| 370 | uint32_t fSet = 0;
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| 371 |
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| 372 | if (fRts)
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| 373 | fSet |= RTSERIALPORT_CHG_STS_LINES_F_RTS;
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[70800] | 374 | else
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[72117] | 375 | fClear |= RTSERIALPORT_CHG_STS_LINES_F_RTS;
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[4748] | 376 |
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[72117] | 377 | if (fDtr)
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| 378 | fSet |= RTSERIALPORT_CHG_STS_LINES_F_DTR;
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| 379 | else
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| 380 | fClear |= RTSERIALPORT_CHG_STS_LINES_F_DTR;
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| 381 |
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| 382 | return RTSerialPortChgStatusLines(pThis->hSerialPort, fClear, fSet);
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[4748] | 383 | }
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| 384 |
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| 385 |
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| 386 | /**
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[72117] | 387 | * @interface_method_impl{PDMISERIALCONNECTOR,pfnChgBrk}
|
---|
| 388 | */
|
---|
| 389 | static DECLCALLBACK(int) drvHostSerialChgBrk(PPDMISERIALCONNECTOR pInterface, bool fBrk)
|
---|
| 390 | {
|
---|
| 391 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
|
---|
| 392 |
|
---|
| 393 | return RTSerialPortChgBreakCondition(pThis->hSerialPort, fBrk);
|
---|
| 394 | }
|
---|
| 395 |
|
---|
| 396 |
|
---|
| 397 | /**
|
---|
| 398 | * @interface_method_impl{PDMISERIALCONNECTOR,pfnQueryStsLines}
|
---|
| 399 | */
|
---|
| 400 | static DECLCALLBACK(int) drvHostSerialQueryStsLines(PPDMISERIALCONNECTOR pInterface, uint32_t *pfStsLines)
|
---|
| 401 | {
|
---|
| 402 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
|
---|
| 403 |
|
---|
| 404 | return RTSerialPortQueryStatusLines(pThis->hSerialPort, pfStsLines);
|
---|
| 405 | }
|
---|
| 406 |
|
---|
| 407 |
|
---|
[74446] | 408 | /**
|
---|
| 409 | * @callback_method_impl{PDMISERIALCONNECTOR,pfnQueuesFlush}
|
---|
| 410 | */
|
---|
| 411 | static DECLCALLBACK(int) drvHostSerialQueuesFlush(PPDMISERIALCONNECTOR pInterface, bool fQueueRecv, bool fQueueXmit)
|
---|
| 412 | {
|
---|
| 413 | RT_NOREF(fQueueXmit);
|
---|
| 414 | LogFlowFunc(("pInterface=%#p fQueueRecv=%RTbool fQueueXmit=%RTbool\n", pInterface, fQueueRecv, fQueueXmit));
|
---|
| 415 | int rc = VINF_SUCCESS;
|
---|
| 416 | PDRVHOSTSERIAL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTSERIAL, ISerialConnector);
|
---|
| 417 |
|
---|
| 418 | if (fQueueRecv)
|
---|
[74454] | 419 | {
|
---|
[82865] | 420 | size_t cbOld = drvHostSerialReadBufReset(pThis);
|
---|
[74446] | 421 | if (cbOld) /* Kick the I/O thread to fetch new data. */
|
---|
[83521] | 422 | rc = drvHostSerialWakeupIoThread(pThis);
|
---|
[74446] | 423 | }
|
---|
| 424 |
|
---|
| 425 | LogFlowFunc(("-> %Rrc\n", rc));
|
---|
[103425] | 426 | return rc;
|
---|
[74446] | 427 | }
|
---|
| 428 |
|
---|
| 429 |
|
---|
[72117] | 430 | /* -=-=-=-=- I/O thread -=-=-=-=- */
|
---|
| 431 |
|
---|
| 432 | /**
|
---|
[83521] | 433 | * The normal I/O loop.
|
---|
[4748] | 434 | *
|
---|
[83521] | 435 | * @returns VBox status code.
|
---|
| 436 | * @param pDrvIns Pointer to the driver instance data.
|
---|
| 437 | * @param pThis Host serial driver instance data.
|
---|
| 438 | * @param pThread Thread instance data.
|
---|
[4748] | 439 | */
|
---|
[83521] | 440 | static int drvHostSerialIoLoopNormal(PPDMDRVINS pDrvIns, PDRVHOSTSERIAL pThis, PPDMTHREAD pThread)
|
---|
[4748] | 441 | {
|
---|
[83521] | 442 | int rc = VINF_SUCCESS;
|
---|
| 443 | while ( pThread->enmState == PDMTHREADSTATE_RUNNING
|
---|
| 444 | && RT_SUCCESS(rc))
|
---|
[4748] | 445 | {
|
---|
[70800] | 446 | uint32_t fEvtFlags = RTSERIALPORT_EVT_F_STATUS_LINE_CHANGED | RTSERIALPORT_EVT_F_BREAK_DETECTED;
|
---|
[12380] | 447 |
|
---|
[73712] | 448 | if (!pThis->fAvailWrInt)
|
---|
| 449 | pThis->fAvailWrInt = ASMAtomicXchgBool(&pThis->fAvailWrExt, false);
|
---|
| 450 |
|
---|
[70800] | 451 | /* Wait until there is room again if there is anyting to send. */
|
---|
[73712] | 452 | if ( pThis->fAvailWrInt
|
---|
[72117] | 453 | || pThis->cbTxUsed)
|
---|
[70800] | 454 | fEvtFlags |= RTSERIALPORT_EVT_F_DATA_TX;
|
---|
[4748] | 455 |
|
---|
[70800] | 456 | /* Try to receive more if there is still room. */
|
---|
[72117] | 457 | if (drvHostSerialReadBufGetWrite(pThis, NULL) > 0)
|
---|
[70800] | 458 | fEvtFlags |= RTSERIALPORT_EVT_F_DATA_RX;
|
---|
[4748] | 459 |
|
---|
[70800] | 460 | uint32_t fEvtsRecv = 0;
|
---|
[83521] | 461 | rc = RTSerialPortEvtPoll(pThis->hSerialPort, fEvtFlags, &fEvtsRecv, RT_INDEFINITE_WAIT);
|
---|
[70800] | 462 | if (RT_SUCCESS(rc))
|
---|
[4748] | 463 | {
|
---|
[70800] | 464 | if (fEvtsRecv & RTSERIALPORT_EVT_F_DATA_TX)
|
---|
[12347] | 465 | {
|
---|
[77324] | 466 | if ( pThis->fAvailWrInt
|
---|
| 467 | && pThis->cbTxUsed < RT_ELEMENTS(pThis->abTxBuf))
|
---|
[72117] | 468 | {
|
---|
| 469 | /* Stuff as much data into the TX buffer as we can. */
|
---|
[73712] | 470 | size_t cbToFetch = RT_ELEMENTS(pThis->abTxBuf) - pThis->cbTxUsed;
|
---|
[72117] | 471 | size_t cbFetched = 0;
|
---|
| 472 | rc = pThis->pDrvSerialPort->pfnReadWr(pThis->pDrvSerialPort, &pThis->abTxBuf[pThis->cbTxUsed], cbToFetch,
|
---|
| 473 | &cbFetched);
|
---|
| 474 | AssertRC(rc);
|
---|
| 475 |
|
---|
[73243] | 476 | if (cbFetched > 0)
|
---|
[73712] | 477 | pThis->cbTxUsed += cbFetched;
|
---|
[73243] | 478 | else
|
---|
| 479 | {
|
---|
[73712] | 480 | /* There is no data available anymore. */
|
---|
| 481 | pThis->fAvailWrInt = false;
|
---|
[73243] | 482 | }
|
---|
[72117] | 483 | }
|
---|
| 484 |
|
---|
[73243] | 485 | if (pThis->cbTxUsed)
|
---|
[12347] | 486 | {
|
---|
[73243] | 487 | size_t cbProcessed = 0;
|
---|
| 488 | rc = RTSerialPortWriteNB(pThis->hSerialPort, &pThis->abTxBuf[0], pThis->cbTxUsed, &cbProcessed);
|
---|
| 489 | if (RT_SUCCESS(rc))
|
---|
[72117] | 490 | {
|
---|
[73243] | 491 | pThis->cbTxUsed -= cbProcessed;
|
---|
[77324] | 492 | if ( pThis->cbTxUsed
|
---|
| 493 | && cbProcessed)
|
---|
[73243] | 494 | {
|
---|
| 495 | /* Move the data in the TX buffer to the front to fill the end again. */
|
---|
[83521] | 496 | memmove(&pThis->abTxBuf[0], &pThis->abTxBuf[cbProcessed], pThis->cbTxUsed);
|
---|
| 497 | }
|
---|
[73243] | 498 | else
|
---|
| 499 | pThis->pDrvSerialPort->pfnDataSentNotify(pThis->pDrvSerialPort);
|
---|
| 500 | STAM_COUNTER_ADD(&pThis->StatBytesWritten, cbProcessed);
|
---|
[72117] | 501 | }
|
---|
| 502 | else
|
---|
[73243] | 503 | {
|
---|
| 504 | LogRelMax(10, ("HostSerial#%d: Sending data failed even though the serial port is marked as writeable (rc=%Rrc)\n",
|
---|
| 505 | pThis->pDrvIns->iInstance, rc));
|
---|
| 506 | break;
|
---|
| 507 | }
|
---|
[12347] | 508 | }
|
---|
| 509 | }
|
---|
| 510 |
|
---|
[70800] | 511 | if (fEvtsRecv & RTSERIALPORT_EVT_F_DATA_RX)
|
---|
[12347] | 512 | {
|
---|
[72117] | 513 | void *pvDst = NULL;
|
---|
| 514 | size_t cbToRead = drvHostSerialReadBufGetWrite(pThis, &pvDst);
|
---|
| 515 | size_t cbRead = 0;
|
---|
| 516 | rc = RTSerialPortReadNB(pThis->hSerialPort, pvDst, cbToRead, &cbRead);
|
---|
[82865] | 517 | /*
|
---|
| 518 | * No data being available while the port is marked as readable can happen
|
---|
| 519 | * if another thread changed the settings of the port inbetween the poll and
|
---|
| 520 | * the read call because it can flush all the buffered data (seen on Windows).
|
---|
| 521 | */
|
---|
| 522 | if (rc != VINF_TRY_AGAIN)
|
---|
[40438] | 523 | {
|
---|
[82865] | 524 | if (RT_SUCCESS(rc))
|
---|
| 525 | {
|
---|
| 526 | drvHostSerialReadBufWriteAdv(pThis, cbRead);
|
---|
| 527 | /* Notify the device/driver above. */
|
---|
| 528 | rc = pThis->pDrvSerialPort->pfnDataAvailRdrNotify(pThis->pDrvSerialPort, cbRead);
|
---|
| 529 | AssertRC(rc);
|
---|
| 530 | }
|
---|
| 531 | else
|
---|
| 532 | LogRelMax(10, ("HostSerial#%d: Reading data failed even though the serial port is marked as readable (rc=%Rrc)\n",
|
---|
| 533 | pThis->pDrvIns->iInstance, rc));
|
---|
[40438] | 534 | }
|
---|
[5004] | 535 | }
|
---|
[16217] | 536 |
|
---|
[70800] | 537 | if (fEvtsRecv & RTSERIALPORT_EVT_F_BREAK_DETECTED)
|
---|
[72117] | 538 | pThis->pDrvSerialPort->pfnNotifyBrk(pThis->pDrvSerialPort);
|
---|
[5004] | 539 |
|
---|
[70800] | 540 | if (fEvtsRecv & RTSERIALPORT_EVT_F_STATUS_LINE_CHANGED)
|
---|
[4928] | 541 | {
|
---|
[70800] | 542 | /* The status lines have changed. Notify the device. */
|
---|
| 543 | uint32_t fStsLines = 0;
|
---|
| 544 | rc = RTSerialPortQueryStatusLines(pThis->hSerialPort, &fStsLines);
|
---|
| 545 | if (RT_SUCCESS(rc))
|
---|
[5004] | 546 | {
|
---|
[70800] | 547 | uint32_t fPdmStsLines = 0;
|
---|
[6185] | 548 |
|
---|
[70800] | 549 | if (fStsLines & RTSERIALPORT_STS_LINE_DCD)
|
---|
[72117] | 550 | fPdmStsLines |= PDMISERIALPORT_STS_LINE_DCD;
|
---|
[70800] | 551 | if (fStsLines & RTSERIALPORT_STS_LINE_RI)
|
---|
[72117] | 552 | fPdmStsLines |= PDMISERIALPORT_STS_LINE_RI;
|
---|
[70800] | 553 | if (fStsLines & RTSERIALPORT_STS_LINE_DSR)
|
---|
[72117] | 554 | fPdmStsLines |= PDMISERIALPORT_STS_LINE_DSR;
|
---|
[70800] | 555 | if (fStsLines & RTSERIALPORT_STS_LINE_CTS)
|
---|
[72117] | 556 | fPdmStsLines |= PDMISERIALPORT_STS_LINE_CTS;
|
---|
[5004] | 557 |
|
---|
[72117] | 558 | rc = pThis->pDrvSerialPort->pfnNotifyStsLinesChanged(pThis->pDrvSerialPort, fPdmStsLines);
|
---|
[11266] | 559 | if (RT_FAILURE(rc))
|
---|
[6185] | 560 | {
|
---|
| 561 | /* Notifying device failed, continue but log it */
|
---|
[70800] | 562 | LogRelMax(10, ("HostSerial#%d: Notifying device about changed status lines failed with error %Rrc; continuing.\n",
|
---|
| 563 | pDrvIns->iInstance, rc));
|
---|
[83521] | 564 | rc = VINF_SUCCESS;
|
---|
[6185] | 565 | }
|
---|
| 566 | }
|
---|
| 567 | else
|
---|
[83521] | 568 | {
|
---|
[70800] | 569 | LogRelMax(10, ("HostSerial#%d: Getting status lines state failed with error %Rrc; continuing.\n", pDrvIns->iInstance, rc));
|
---|
[83521] | 570 | rc = VINF_SUCCESS;
|
---|
| 571 | }
|
---|
[6185] | 572 | }
|
---|
[4748] | 573 |
|
---|
[70800] | 574 | if (fEvtsRecv & RTSERIALPORT_EVT_F_STATUS_LINE_MONITOR_FAILED)
|
---|
[86467] | 575 | {
|
---|
| 576 | LogRel(("HostSerial#%d: Status line monitoring failed at a lower level with rc=%Rrc and is disabled\n", pDrvIns->iInstance, rc));
|
---|
| 577 | rc = VINF_SUCCESS;
|
---|
| 578 | }
|
---|
[4748] | 579 | }
|
---|
[70800] | 580 | else if (rc == VERR_TIMEOUT || rc == VERR_INTERRUPTED)
|
---|
[4748] | 581 | {
|
---|
[70800] | 582 | /* Getting interrupted or running into a timeout are no error conditions. */
|
---|
| 583 | rc = VINF_SUCCESS;
|
---|
[4748] | 584 | }
|
---|
| 585 | }
|
---|
| 586 |
|
---|
[83521] | 587 | LogRel(("HostSerial#%d: The underlying host device run into a fatal error condition %Rrc, any data transfer is disabled\n",
|
---|
| 588 | pDrvIns->iInstance, rc));
|
---|
| 589 |
|
---|
| 590 | return rc;
|
---|
| 591 | }
|
---|
| 592 |
|
---|
| 593 |
|
---|
| 594 | /**
|
---|
| 595 | * The error I/O loop.
|
---|
| 596 | *
|
---|
| 597 | * @param pThis Host serial driver instance data.
|
---|
| 598 | * @param pThread Thread instance data.
|
---|
| 599 | */
|
---|
| 600 | static void drvHostSerialIoLoopError(PDRVHOSTSERIAL pThis, PPDMTHREAD pThread)
|
---|
| 601 | {
|
---|
| 602 | ASMAtomicXchgBool(&pThis->fIoFatalErr, true);
|
---|
| 603 |
|
---|
| 604 | PDMDrvHlpVMSetRuntimeError(pThis->pDrvIns, 0 /*fFlags*/, "SerialPortIoError",
|
---|
| 605 | N_("The host serial port \"%s\" encountered a fatal error and stopped functioning. "
|
---|
| 606 | "This can be caused by bad cabling or USB to serial converters being unplugged by accident. "
|
---|
| 607 | "To restart I/O transfers suspend and resume the VM after fixing the underlying issue."),
|
---|
| 608 | pThis->pszDevicePath);
|
---|
| 609 |
|
---|
| 610 | while (pThread->enmState == PDMTHREADSTATE_RUNNING)
|
---|
| 611 | {
|
---|
| 612 | /*
|
---|
| 613 | * We have to discard any data which is going to be send (the error
|
---|
| 614 | * mode resembles the "someone just pulled the plug on the serial port" situation)
|
---|
| 615 | */
|
---|
| 616 | RTSemEventWait(pThis->hSemEvtIoFatalErr, RT_INDEFINITE_WAIT);
|
---|
| 617 |
|
---|
| 618 | if (ASMAtomicXchgBool(&pThis->fAvailWrExt, false))
|
---|
| 619 | {
|
---|
| 620 | size_t cbFetched = 0;
|
---|
| 621 |
|
---|
| 622 | do
|
---|
| 623 | {
|
---|
| 624 | /* Stuff as much data into the TX buffer as we can. */
|
---|
| 625 | uint8_t abDiscard[64];
|
---|
| 626 | int rc = pThis->pDrvSerialPort->pfnReadWr(pThis->pDrvSerialPort, &abDiscard, sizeof(abDiscard),
|
---|
| 627 | &cbFetched);
|
---|
| 628 | AssertRC(rc);
|
---|
| 629 | } while (cbFetched > 0);
|
---|
| 630 |
|
---|
| 631 | /* Acknowledge the sent data. */
|
---|
| 632 | pThis->pDrvSerialPort->pfnDataSentNotify(pThis->pDrvSerialPort);
|
---|
| 633 |
|
---|
| 634 | /*
|
---|
| 635 | * Sleep a bit to avoid excessive I/O loop CPU usage, timing is not important in
|
---|
| 636 | * this mode.
|
---|
| 637 | */
|
---|
[91945] | 638 | PDMDrvHlpThreadSleep(pThis->pDrvIns, pThread, 100);
|
---|
[83521] | 639 | }
|
---|
| 640 | }
|
---|
| 641 | }
|
---|
| 642 |
|
---|
| 643 |
|
---|
| 644 | /**
|
---|
| 645 | * I/O thread loop.
|
---|
| 646 | *
|
---|
| 647 | * @returns VINF_SUCCESS.
|
---|
| 648 | * @param pDrvIns PDM driver instance data.
|
---|
| 649 | * @param pThread The PDM thread data.
|
---|
| 650 | */
|
---|
| 651 | static DECLCALLBACK(int) drvHostSerialIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
| 652 | {
|
---|
| 653 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
| 654 |
|
---|
| 655 | if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
|
---|
| 656 | return VINF_SUCCESS;
|
---|
| 657 |
|
---|
| 658 | int rc = VINF_SUCCESS;
|
---|
| 659 | if (!pThis->fIoFatalErr)
|
---|
| 660 | rc = drvHostSerialIoLoopNormal(pDrvIns, pThis, pThread);
|
---|
| 661 |
|
---|
| 662 | if ( RT_FAILURE(rc)
|
---|
| 663 | || pThis->fIoFatalErr)
|
---|
| 664 | drvHostSerialIoLoopError(pThis, pThread);
|
---|
| 665 |
|
---|
[5004] | 666 | return VINF_SUCCESS;
|
---|
| 667 | }
|
---|
[4748] | 668 |
|
---|
[5004] | 669 |
|
---|
[6016] | 670 | /**
|
---|
[70800] | 671 | * Unblock the send thread so it can respond to a state change.
|
---|
[6016] | 672 | *
|
---|
| 673 | * @returns a VBox status code.
|
---|
| 674 | * @param pDrvIns The driver instance.
|
---|
| 675 | * @param pThread The send thread.
|
---|
| 676 | */
|
---|
[70800] | 677 | static DECLCALLBACK(int) drvHostSerialWakeupIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
|
---|
[6016] | 678 | {
|
---|
[70800] | 679 | RT_NOREF(pThread);
|
---|
[11269] | 680 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
[6185] | 681 |
|
---|
[83521] | 682 | return drvHostSerialWakeupIoThread(pThis);
|
---|
[70800] | 683 | }
|
---|
[11451] | 684 |
|
---|
| 685 |
|
---|
[4748] | 686 | /* -=-=-=-=- driver interface -=-=-=-=- */
|
---|
| 687 |
|
---|
| 688 | /**
|
---|
[83521] | 689 | * @callback_method_impl{FNPDMDRVRESUME}
|
---|
| 690 | */
|
---|
| 691 | static DECLCALLBACK(void) drvHostSerialResume(PPDMDRVINS pDrvIns)
|
---|
| 692 | {
|
---|
| 693 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
| 694 |
|
---|
| 695 | if (RT_UNLIKELY(pThis->fIoFatalErr))
|
---|
| 696 | {
|
---|
| 697 | /* Try to reopen the device and set the old config. */
|
---|
| 698 | uint32_t fOpenFlags = RTSERIALPORT_OPEN_F_READ
|
---|
| 699 | | RTSERIALPORT_OPEN_F_WRITE
|
---|
| 700 | | RTSERIALPORT_OPEN_F_SUPPORT_STATUS_LINE_MONITORING
|
---|
| 701 | | RTSERIALPORT_OPEN_F_DETECT_BREAK_CONDITION;
|
---|
| 702 | int rc = RTSerialPortOpen(&pThis->hSerialPort, pThis->pszDevicePath, fOpenFlags);
|
---|
| 703 | if (rc == VERR_NOT_SUPPORTED)
|
---|
| 704 | {
|
---|
| 705 | /*
|
---|
| 706 | * For certain devices (or pseudo terminals) status line monitoring does not work
|
---|
| 707 | * so try again without it.
|
---|
| 708 | */
|
---|
| 709 | fOpenFlags &= ~RTSERIALPORT_OPEN_F_SUPPORT_STATUS_LINE_MONITORING;
|
---|
| 710 | rc = RTSerialPortOpen(&pThis->hSerialPort, pThis->pszDevicePath, fOpenFlags);
|
---|
| 711 | }
|
---|
| 712 |
|
---|
| 713 | if (RT_SUCCESS(rc))
|
---|
| 714 | {
|
---|
| 715 | /* Set the config which is currently active. */
|
---|
| 716 | rc = RTSerialPortCfgSet(pThis->hSerialPort, &pThis->Cfg, NULL);
|
---|
| 717 | if (RT_FAILURE(rc))
|
---|
| 718 | LogRelMax(10, ("HostSerial#%d: Setting the active serial port config failed with error %Rrc during VM resume; continuing.\n", pDrvIns->iInstance, rc));
|
---|
| 719 | /* Reset the I/O error flag on success to resume the normal I/O thread loop. */
|
---|
| 720 | ASMAtomicXchgBool(&pThis->fIoFatalErr, false);
|
---|
| 721 | }
|
---|
| 722 | }
|
---|
| 723 | }
|
---|
| 724 |
|
---|
| 725 |
|
---|
| 726 | /**
|
---|
| 727 | * @callback_method_impl{FNPDMDRVSUSPEND}
|
---|
| 728 | */
|
---|
| 729 | static DECLCALLBACK(void) drvHostSerialSuspend(PPDMDRVINS pDrvIns)
|
---|
| 730 | {
|
---|
| 731 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
|
---|
| 732 |
|
---|
| 733 | if (RT_UNLIKELY(pThis->fIoFatalErr))
|
---|
| 734 | {
|
---|
| 735 | /* Close the device and try reopening it on resume. */
|
---|
| 736 | if (pThis->hSerialPort != NIL_RTSERIALPORT)
|
---|
| 737 | {
|
---|
| 738 | RTSerialPortClose(pThis->hSerialPort);
|
---|
| 739 | pThis->hSerialPort = NIL_RTSERIALPORT;
|
---|
| 740 | }
|
---|
| 741 | }
|
---|
| 742 | }
|
---|
| 743 |
|
---|
| 744 |
|
---|
| 745 | /**
|
---|
[26001] | 746 | * Destruct a char driver instance.
|
---|
| 747 | *
|
---|
| 748 | * Most VM resources are freed by the VM. This callback is provided so that
|
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| 749 | * any non-VM resources can be freed correctly.
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| 750 | *
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| 751 | * @param pDrvIns The driver instance data.
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| 752 | */
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| 753 | static DECLCALLBACK(void) drvHostSerialDestruct(PPDMDRVINS pDrvIns)
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| 754 | {
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[72117] | 755 | PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
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[26001] | 756 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
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| 757 | LogFlow(("%s: iInstance=%d\n", __FUNCTION__, pDrvIns->iInstance));
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| 758 |
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[70800] | 759 | if (pThis->hSerialPort != NIL_RTSERIALPORT)
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[45061] | 760 | {
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[70800] | 761 | RTSerialPortClose(pThis->hSerialPort);
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| 762 | pThis->hSerialPort = NIL_RTSERIALPORT;
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[45061] | 763 | }
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[26001] | 764 |
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[83521] | 765 | if (pThis->hSemEvtIoFatalErr != NIL_RTSEMEVENT)
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| 766 | {
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| 767 | RTSemEventDestroy(pThis->hSemEvtIoFatalErr);
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| 768 | pThis->hSemEvtIoFatalErr = NIL_RTSEMEVENT;
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| 769 | }
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| 770 |
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[32678] | 771 | if (pThis->pszDevicePath)
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| 772 | {
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[91897] | 773 | PDMDrvHlpMMHeapFree(pDrvIns, pThis->pszDevicePath);
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[32678] | 774 | pThis->pszDevicePath = NULL;
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| 775 | }
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[26001] | 776 | }
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| 777 |
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[70800] | 778 |
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[26001] | 779 | /**
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[4748] | 780 | * Construct a char driver instance.
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[23973] | 781 | *
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[22277] | 782 | * @copydoc FNPDMDRVCONSTRUCT
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[4748] | 783 | */
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[64276] | 784 | static DECLCALLBACK(int) drvHostSerialConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
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[4748] | 785 | {
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[64276] | 786 | RT_NOREF1(fFlags);
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[26001] | 787 | PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
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[91868] | 788 | PDRVHOSTSERIAL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTSERIAL);
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| 789 | PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
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[4748] | 790 |
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[91868] | 791 | LogFlow(("%s: iInstance=%d\n", __FUNCTION__, pDrvIns->iInstance));
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| 792 |
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[4748] | 793 | /*
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| 794 | * Init basic data members and interfaces.
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| 795 | */
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[72132] | 796 | pThis->pDrvIns = pDrvIns;
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[72117] | 797 | pThis->hSerialPort = NIL_RTSERIALPORT;
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[73712] | 798 | pThis->fAvailWrExt = false;
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| 799 | pThis->fAvailWrInt = false;
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[72117] | 800 | pThis->cbTxUsed = 0;
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| 801 | pThis->offWrite = 0;
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| 802 | pThis->offRead = 0;
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[72132] | 803 | pThis->cbReadBuf = 0;
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[83521] | 804 | pThis->fIoFatalErr = false;
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| 805 | pThis->hSemEvtIoFatalErr = NIL_RTSEMEVENT;
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[4748] | 806 | /* IBase. */
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[72117] | 807 | pDrvIns->IBase.pfnQueryInterface = drvHostSerialQueryInterface;
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| 808 | /* ISerialConnector. */
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| 809 | pThis->ISerialConnector.pfnDataAvailWrNotify = drvHostSerialDataAvailWrNotify;
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| 810 | pThis->ISerialConnector.pfnReadRdr = drvHostSerialReadRdr;
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| 811 | pThis->ISerialConnector.pfnChgParams = drvHostSerialChgParams;
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| 812 | pThis->ISerialConnector.pfnChgModemLines = drvHostSerialChgModemLines;
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| 813 | pThis->ISerialConnector.pfnChgBrk = drvHostSerialChgBrk;
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| 814 | pThis->ISerialConnector.pfnQueryStsLines = drvHostSerialQueryStsLines;
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[74446] | 815 | pThis->ISerialConnector.pfnQueuesFlush = drvHostSerialQueuesFlush;
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[4748] | 816 |
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| 817 | /*
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[91868] | 818 | * Validate the config.
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| 819 | */
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| 820 | PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "DevicePath", "");
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| 821 |
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| 822 | /*
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[4748] | 823 | * Query configuration.
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| 824 | */
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| 825 | /* Device */
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[91868] | 826 | int rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "DevicePath", &pThis->pszDevicePath);
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[11266] | 827 | if (RT_FAILURE(rc))
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[4748] | 828 | {
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[11286] | 829 | AssertMsgFailed(("Configuration error: query for \"DevicePath\" string returned %Rra.\n", rc));
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[4748] | 830 | return rc;
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| 831 | }
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| 832 |
|
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| 833 | /*
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| 834 | * Open the device
|
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| 835 | */
|
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[70800] | 836 | uint32_t fOpenFlags = RTSERIALPORT_OPEN_F_READ
|
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| 837 | | RTSERIALPORT_OPEN_F_WRITE
|
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| 838 | | RTSERIALPORT_OPEN_F_SUPPORT_STATUS_LINE_MONITORING
|
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| 839 | | RTSERIALPORT_OPEN_F_DETECT_BREAK_CONDITION;
|
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| 840 | rc = RTSerialPortOpen(&pThis->hSerialPort, pThis->pszDevicePath, fOpenFlags);
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[72073] | 841 | if (rc == VERR_NOT_SUPPORTED)
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| 842 | {
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| 843 | /*
|
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| 844 | * For certain devices (or pseudo terminals) status line monitoring does not work
|
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| 845 | * so try again without it.
|
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| 846 | */
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| 847 | fOpenFlags &= ~RTSERIALPORT_OPEN_F_SUPPORT_STATUS_LINE_MONITORING;
|
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| 848 | rc = RTSerialPortOpen(&pThis->hSerialPort, pThis->pszDevicePath, fOpenFlags);
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| 849 | }
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| 850 |
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[11266] | 851 | if (RT_FAILURE(rc))
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[5004] | 852 | {
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[11284] | 853 | AssertMsgFailed(("Could not open host device %s, rc=%Rrc\n", pThis->pszDevicePath, rc));
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[5004] | 854 | switch (rc)
|
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| 855 | {
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[4748] | 856 | case VERR_ACCESS_DENIED:
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| 857 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
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[22876] | 858 | #if defined(RT_OS_LINUX) || defined(RT_OS_DARWIN) || defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)
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[4748] | 859 | N_("Cannot open host device '%s' for read/write access. Check the permissions "
|
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| 860 | "of that device ('/bin/ls -l %s'): Most probably you need to be member "
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---|
| 861 | "of the device group. Make sure that you logout/login after changing "
|
---|
| 862 | "the group settings of the current user"),
|
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| 863 | #else
|
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| 864 | N_("Cannot open host device '%s' for read/write access. Check the permissions "
|
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| 865 | "of that device"),
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| 866 | #endif
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[11269] | 867 | pThis->pszDevicePath, pThis->pszDevicePath);
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[4748] | 868 | default:
|
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| 869 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
|
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| 870 | N_("Failed to open host device '%s'"),
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[11269] | 871 | pThis->pszDevicePath);
|
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[4748] | 872 | }
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| 873 | }
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| 874 |
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[83521] | 875 | rc = RTSemEventCreate(&pThis->hSemEvtIoFatalErr);
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| 876 | if (RT_FAILURE(rc))
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| 877 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostSerial#%d failed to create event semaphore"), pDrvIns->iInstance);
|
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| 878 |
|
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[4748] | 879 | /*
|
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[72117] | 880 | * Get the ISerialPort interface of the above driver/device.
|
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[4748] | 881 | */
|
---|
[72117] | 882 | pThis->pDrvSerialPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMISERIALPORT);
|
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| 883 | if (!pThis->pDrvSerialPort)
|
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| 884 | return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE, RT_SRC_POS, N_("HostSerial#%d has no serial port interface above"), pDrvIns->iInstance);
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[4748] | 885 |
|
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[12325] | 886 | /*
|
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[70800] | 887 | * Create the I/O thread.
|
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[12325] | 888 | */
|
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[70800] | 889 | rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pIoThrd, pThis, drvHostSerialIoThread, drvHostSerialWakeupIoThread, 0, RTTHREADTYPE_IO, "SerIo");
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[11266] | 890 | if (RT_FAILURE(rc))
|
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[70800] | 891 | return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostSerial#%d cannot create I/O thread"), pDrvIns->iInstance);
|
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[4748] | 892 |
|
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[12325] | 893 | /*
|
---|
| 894 | * Register release statistics.
|
---|
| 895 | */
|
---|
[72073] | 896 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesWritten, STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_BYTES,
|
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| 897 | "Nr of bytes written", "/Devices/HostSerial%d/Written", pDrvIns->iInstance);
|
---|
| 898 | PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatBytesRead, STAMTYPE_COUNTER, STAMVISIBILITY_USED, STAMUNIT_BYTES,
|
---|
| 899 | "Nr of bytes read", "/Devices/HostSerial%d/Read", pDrvIns->iInstance);
|
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[4748] | 900 |
|
---|
| 901 | return VINF_SUCCESS;
|
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| 902 | }
|
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| 903 |
|
---|
| 904 | /**
|
---|
| 905 | * Char driver registration record.
|
---|
| 906 | */
|
---|
| 907 | const PDMDRVREG g_DrvHostSerial =
|
---|
| 908 | {
|
---|
| 909 | /* u32Version */
|
---|
| 910 | PDM_DRVREG_VERSION,
|
---|
[26166] | 911 | /* szName */
|
---|
[4748] | 912 | "Host Serial",
|
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[72073] | 913 | /* szRCMod */
|
---|
[25893] | 914 | "",
|
---|
| 915 | /* szR0Mod */
|
---|
| 916 | "",
|
---|
[70800] | 917 | /* pszDescription */
|
---|
[4748] | 918 | "Host serial driver.",
|
---|
| 919 | /* fFlags */
|
---|
| 920 | PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
|
---|
| 921 | /* fClass. */
|
---|
| 922 | PDM_DRVREG_CLASS_CHAR,
|
---|
| 923 | /* cMaxInstances */
|
---|
[40282] | 924 | ~0U,
|
---|
[4748] | 925 | /* cbInstance */
|
---|
| 926 | sizeof(DRVHOSTSERIAL),
|
---|
| 927 | /* pfnConstruct */
|
---|
| 928 | drvHostSerialConstruct,
|
---|
| 929 | /* pfnDestruct */
|
---|
| 930 | drvHostSerialDestruct,
|
---|
[25893] | 931 | /* pfnRelocate */
|
---|
| 932 | NULL,
|
---|
[4748] | 933 | /* pfnIOCtl */
|
---|
| 934 | NULL,
|
---|
| 935 | /* pfnPowerOn */
|
---|
| 936 | NULL,
|
---|
| 937 | /* pfnReset */
|
---|
| 938 | NULL,
|
---|
| 939 | /* pfnSuspend */
|
---|
[83521] | 940 | drvHostSerialSuspend,
|
---|
[4748] | 941 | /* pfnResume */
|
---|
[83521] | 942 | drvHostSerialResume,
|
---|
[22277] | 943 | /* pfnAttach */
|
---|
| 944 | NULL,
|
---|
[4748] | 945 | /* pfnDetach */
|
---|
[23973] | 946 | NULL,
|
---|
[22277] | 947 | /* pfnPowerOff */
|
---|
[23973] | 948 | NULL,
|
---|
[22277] | 949 | /* pfnSoftReset */
|
---|
[4748] | 950 | NULL,
|
---|
[22277] | 951 | /* u32EndVersion */
|
---|
| 952 | PDM_DRVREG_VERSION
|
---|
[4748] | 953 | };
|
---|
| 954 |
|
---|