VirtualBox

source: vbox/trunk/src/VBox/Devices/Parallel/DrvHostParallel.cpp

Last change on this file was 106061, checked in by vboxsync, 3 months ago

Copyright year updates by scm.
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1/* $Id: DrvHostParallel.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2/** @file
3 * VirtualBox Host Parallel Port Driver.
4 *
5 * Initial Linux-only code contributed by: Alexander Eichner
6 */
7
8/*
9 * Copyright (C) 2006-2024 Oracle and/or its affiliates.
10 *
11 * This file is part of VirtualBox base platform packages, as
12 * available from https://www.virtualbox.org.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation, in version 3 of the
17 * License.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <https://www.gnu.org/licenses>.
26 *
27 * SPDX-License-Identifier: GPL-3.0-only
28 */
29
30
31/*********************************************************************************************************************************
32* Header Files *
33*********************************************************************************************************************************/
34#define LOG_GROUP LOG_GROUP_DRV_HOST_PARALLEL
35#include <VBox/vmm/pdmdrv.h>
36#include <VBox/vmm/pdmthread.h>
37#include <iprt/asm.h>
38#include <iprt/assert.h>
39#include <iprt/file.h>
40#include <iprt/pipe.h>
41#include <iprt/semaphore.h>
42#include <iprt/stream.h>
43#include <iprt/uuid.h>
44#include <iprt/cdefs.h>
45#include <iprt/ctype.h>
46
47#ifdef RT_OS_LINUX
48# include <sys/ioctl.h>
49# include <sys/types.h>
50# include <sys/stat.h>
51# include <sys/poll.h>
52# include <fcntl.h>
53# include <unistd.h>
54# include <linux/ppdev.h>
55# include <linux/parport.h>
56# include <errno.h>
57#endif
58
59/** @def VBOX_WITH_WIN_PARPORT_SUP
60 * Indicates whether to use the generic direct hardware access or host specific
61 * code to access the parallel port.
62 */
63#if defined(DOXYGEN_RUNNING)
64# define VBOX_WITH_WIN_PARPORT_SUP
65#endif
66#if defined(RT_OS_LINUX)
67# undef VBOX_WITH_WIN_PARPORT_SUP
68#elif defined(RT_OS_WINDOWS)
69#else
70# error "Not ported"
71#endif
72
73#if defined(VBOX_WITH_WIN_PARPORT_SUP) && defined(IN_RING0)
74# include <iprt/asm-amd64-x86.h>
75#endif
76
77#if defined(VBOX_WITH_WIN_PARPORT_SUP) && defined(IN_RING3)
78# include <iprt/win/windows.h>
79# include <iprt/win/setupapi.h>
80# include <cfgmgr32.h>
81# include <iprt/mem.h>
82# include <iprt/ctype.h>
83# include <iprt/path.h>
84# include <iprt/string.h>
85#endif
86
87#include "VBoxDD.h"
88
89
90/*********************************************************************************************************************************
91* Structures and Typedefs *
92*********************************************************************************************************************************/
93/**
94 * Host parallel port driver instance data.
95 * @implements PDMIHOSTPARALLELCONNECTOR
96 */
97typedef struct DRVHOSTPARALLEL
98{
99 /** Pointer to the driver instance structure. */
100 PPDMDRVINS pDrvIns;
101 /** Pointer to the driver instance. */
102 PPDMDRVINSR3 pDrvInsR3;
103 PPDMDRVINSR0 pDrvInsR0;
104 /** Pointer to the char port interface of the driver/device above us. */
105 PPDMIHOSTPARALLELPORT pDrvHostParallelPort;
106 /** Our host device interface. */
107 PDMIHOSTPARALLELCONNECTOR IHostParallelConnector;
108 /** Our host device interface. */
109 PDMIHOSTPARALLELCONNECTOR IHostParallelConnectorR3;
110 /** Device Path */
111 char *pszDevicePath;
112 /** Device Handle */
113 RTFILE hFileDevice;
114#ifndef VBOX_WITH_WIN_PARPORT_SUP
115 /** Thread waiting for interrupts. */
116 PPDMTHREAD pMonitorThread;
117 /** Wakeup pipe read end. */
118 RTPIPE hWakeupPipeR;
119 /** Wakeup pipe write end. */
120 RTPIPE hWakeupPipeW;
121 /** Current mode the parallel port is in. */
122 PDMPARALLELPORTMODE enmModeCur;
123#endif
124
125#ifdef VBOX_WITH_WIN_PARPORT_SUP
126 /** Data register. */
127 RTIOPORT PortDirectData;
128 /** Status register. */
129 RTIOPORT PortDirectStatus;
130 /** Control register. */
131 RTIOPORT PortDirectControl;
132 /** Control read result buffer. */
133 uint8_t bReadInControl;
134 /** Status read result buffer. */
135 uint8_t bReadInStatus;
136 /** Data buffer for reads and writes. */
137 uint8_t abDataBuf[32];
138#endif /* VBOX_WITH_WIN_PARPORT_SUP */
139} DRVHOSTPARALLEL, *PDRVHOSTPARALLEL;
140
141
142/**
143 * Ring-0 operations.
144 */
145typedef enum DRVHOSTPARALLELR0OP
146{
147 /** Invalid zero value. */
148 DRVHOSTPARALLELR0OP_INVALID = 0,
149 /** Perform R0 initialization. */
150 DRVHOSTPARALLELR0OP_INITR0STUFF,
151 /** Read data into the data buffer (abDataBuf). */
152 DRVHOSTPARALLELR0OP_READ,
153 /** Read status register. */
154 DRVHOSTPARALLELR0OP_READSTATUS,
155 /** Read control register. */
156 DRVHOSTPARALLELR0OP_READCONTROL,
157 /** Write data from the data buffer (abDataBuf). */
158 DRVHOSTPARALLELR0OP_WRITE,
159 /** Write control register. */
160 DRVHOSTPARALLELR0OP_WRITECONTROL,
161 /** Set port direction. */
162 DRVHOSTPARALLELR0OP_SETPORTDIRECTION
163} DRVHOSTPARALLELR0OP;
164
165/** Converts a pointer to DRVHOSTPARALLEL::IHostDeviceConnector to a PDRHOSTPARALLEL. */
166#define PDMIHOSTPARALLELCONNECTOR_2_DRVHOSTPARALLEL(pInterface) ( (PDRVHOSTPARALLEL)((uintptr_t)pInterface - RT_UOFFSETOF(DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector))) )
167
168
169/*********************************************************************************************************************************
170* Defined Constants And Macros *
171*********************************************************************************************************************************/
172#define CTRL_REG_OFFSET 2
173#define STATUS_REG_OFFSET 1
174#define LPT_CONTROL_ENABLE_BIDIRECT 0x20
175
176
177
178#ifdef VBOX_WITH_WIN_PARPORT_SUP
179# ifdef IN_RING0
180
181/**
182 * R0 mode function to write byte value to data port.
183 *
184 * @returns VBox status code.
185 * @param pThis Pointer to the instance data.
186 * @param u64Arg The number of bytes to write (from abDataBuf).
187 */
188static int drvR0HostParallelReqWrite(PDRVHOSTPARALLEL pThis, uint64_t u64Arg)
189{
190 LogFlowFunc(("write %#RX64 bytes to data (%#x)\n", u64Arg, pThis->PortDirectData));
191
192 AssertReturn(u64Arg > 0 && u64Arg <= sizeof(pThis->abDataBuf), VERR_OUT_OF_RANGE);
193 uint8_t const *pbSrc = pThis->abDataBuf;
194 while (u64Arg-- > 0)
195 {
196 ASMOutU8(pThis->PortDirectData, *pbSrc);
197 pbSrc++;
198 }
199
200 return VINF_SUCCESS;
201}
202
203/**
204 * R0 mode function to write byte value to parallel port control register.
205 *
206 * @returns VBox status code.
207 * @param pThis Pointer to the instance data.
208 * @param u64Arg Data to be written to control register.
209 */
210static int drvR0HostParallelReqWriteControl(PDRVHOSTPARALLEL pThis, uint64_t u64Arg)
211{
212 LogFlowFunc(("write to ctrl port=%#x val=%#x\n", pThis->PortDirectControl, u64Arg));
213 ASMOutU8(pThis->PortDirectControl, (uint8_t)(u64Arg));
214 return VINF_SUCCESS;
215}
216
217/**
218 * R0 mode function to ready byte value from the parallel port data register.
219 *
220 * @returns VBox status code.
221 * @param pThis Pointer to the instance data.
222 * @param u64Arg The number of bytes to read into abDataBuf.
223 */
224static int drvR0HostParallelReqRead(PDRVHOSTPARALLEL pThis, uint64_t u64Arg)
225{
226 LogFlowFunc(("read %#RX64 bytes to data (%#x)\n", u64Arg, pThis->PortDirectData));
227
228 AssertReturn(u64Arg > 0 && u64Arg <= sizeof(pThis->abDataBuf), VERR_OUT_OF_RANGE);
229 uint8_t *pbDst = pThis->abDataBuf;
230 while (u64Arg-- > 0)
231 *pbDst++ = ASMInU8(pThis->PortDirectData);
232
233 return VINF_SUCCESS;
234}
235
236/**
237 * R0 mode function to ready byte value from the parallel port control register.
238 *
239 * @returns VBox status code.
240 * @param pThis Pointer to the instance data.
241 */
242static int drvR0HostParallelReqReadControl(PDRVHOSTPARALLEL pThis)
243{
244 uint8_t u8Data = ASMInU8(pThis->PortDirectControl);
245 LogFlowFunc(("read from ctrl port=%#x val=%#x\n", pThis->PortDirectControl, u8Data));
246 pThis->bReadInControl = u8Data;
247 return VINF_SUCCESS;
248}
249
250/**
251 * R0 mode function to ready byte value from the parallel port status register.
252 *
253 * @returns VBox status code.
254 * @param pThis Pointer to the instance data.
255 */
256static int drvR0HostParallelReqReadStatus(PDRVHOSTPARALLEL pThis)
257{
258 uint8_t u8Data = ASMInU8(pThis->PortDirectStatus);
259 LogFlowFunc(("read from status port=%#x val=%#x\n", pThis->PortDirectStatus, u8Data));
260 pThis->bReadInStatus = u8Data;
261 return VINF_SUCCESS;
262}
263
264/**
265 * R0 mode function to set the direction of parallel port -
266 * operate in bidirectional mode or single direction.
267 *
268 * @returns VBox status code.
269 * @param pThis Pointer to the instance data.
270 * @param u64Arg Mode.
271 */
272static int drvR0HostParallelReqSetPortDir(PDRVHOSTPARALLEL pThis, uint64_t u64Arg)
273{
274 uint8_t bCtl = ASMInU8(pThis->PortDirectControl);
275 if (u64Arg)
276 bCtl |= LPT_CONTROL_ENABLE_BIDIRECT; /* enable input direction */
277 else
278 bCtl &= ~LPT_CONTROL_ENABLE_BIDIRECT; /* disable input direction */
279 ASMOutU8(pThis->PortDirectControl, bCtl);
280
281 return VINF_SUCCESS;
282}
283
284/**
285 * @callback_method_impl{FNPDMDRVREQHANDLERR0}
286 */
287PDMBOTHCBDECL(int) drvR0HostParallelReqHandler(PPDMDRVINS pDrvIns, uint32_t uOperation, uint64_t u64Arg)
288{
289 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
290 int rc;
291 LogFlowFuncEnter();
292
293 if (pThis->PortDirectData != 0)
294 {
295 switch ((DRVHOSTPARALLELR0OP)uOperation)
296 {
297 case DRVHOSTPARALLELR0OP_READ:
298 rc = drvR0HostParallelReqRead(pThis, u64Arg);
299 break;
300 case DRVHOSTPARALLELR0OP_READSTATUS:
301 rc = drvR0HostParallelReqReadStatus(pThis);
302 break;
303 case DRVHOSTPARALLELR0OP_READCONTROL:
304 rc = drvR0HostParallelReqReadControl(pThis);
305 break;
306 case DRVHOSTPARALLELR0OP_WRITE:
307 rc = drvR0HostParallelReqWrite(pThis, u64Arg);
308 break;
309 case DRVHOSTPARALLELR0OP_WRITECONTROL:
310 rc = drvR0HostParallelReqWriteControl(pThis, u64Arg);
311 break;
312 case DRVHOSTPARALLELR0OP_SETPORTDIRECTION:
313 rc = drvR0HostParallelReqSetPortDir(pThis, u64Arg);
314 break;
315 default:
316 rc = VERR_INVALID_FUNCTION;
317 break;
318 }
319 }
320 else
321 rc = VERR_WRONG_ORDER;
322
323 LogFlowFuncLeaveRC(rc);
324 return rc;
325}
326
327# endif /* IN_RING0 */
328#endif /* VBOX_WITH_WIN_PARPORT_SUP */
329
330#ifdef IN_RING3
331# ifdef VBOX_WITH_WIN_PARPORT_SUP
332
333/**
334 * Find IO port range for the parallel port and return the lower address.
335 *
336 * @returns Parallel base I/O port.
337 * @param DevInst Device instance (dword/handle) for the parallel port.
338 */
339static RTIOPORT drvHostParallelGetWinHostIoPortsSub(const DEVINST DevInst)
340{
341 RTIOPORT PortBase = 0;
342
343 /* Get handle of the first logical configuration. */
344 LOG_CONF hFirstLogConf;
345 CONFIGRET rcCm = CM_Get_First_Log_Conf(&hFirstLogConf, DevInst, ALLOC_LOG_CONF);
346 if (rcCm != CR_SUCCESS)
347 rcCm = CM_Get_First_Log_Conf(&hFirstLogConf, DevInst, BOOT_LOG_CONF);
348 if (rcCm == CR_SUCCESS)
349 {
350 /*
351 * This loop is based on the "fact" that only one I/O resource is assigned
352 * to the LPT port. Should there ever be multiple resources, we'll pick
353 * the last one for some silly reason.
354 */
355
356 /* Get the first resource descriptor handle. */
357 LOG_CONF hCurLogConf = 0;
358 rcCm = CM_Get_Next_Res_Des(&hCurLogConf, hFirstLogConf, ResType_IO, 0, 0);
359 if (rcCm == CR_SUCCESS)
360 {
361 for (;;)
362 {
363 ULONG cbData;
364 rcCm = CM_Get_Res_Des_Data_Size(&cbData, hCurLogConf, 0);
365 if (rcCm != CR_SUCCESS)
366 cbData = 0;
367 cbData = RT_MAX(cbData, sizeof(IO_DES));
368 IO_DES *pIoDesc = (IO_DES *)RTMemAllocZ(cbData);
369 if (pIoDesc)
370 {
371 rcCm = CM_Get_Res_Des_Data(hCurLogConf, pIoDesc, cbData, 0L);
372 if (rcCm == CR_SUCCESS)
373 {
374 LogRel(("drvHostParallelGetWinHostIoPortsSub: Count=%#u Type=%#x Base=%#RX64 End=%#RX64 Flags=%#x\n",
375 pIoDesc->IOD_Count, pIoDesc->IOD_Type, (uint64_t)pIoDesc->IOD_Alloc_Base,
376 (uint64_t)pIoDesc->IOD_Alloc_End, pIoDesc->IOD_DesFlags));
377 PortBase = (RTIOPORT)pIoDesc->IOD_Alloc_Base;
378 }
379 else
380 LogRel(("drvHostParallelGetWinHostIoPortsSub: CM_Get_Res_Des_Data(,,%u,0) failed: %u\n", cbData, rcCm));
381 RTMemFree(pIoDesc);
382 }
383 else
384 LogRel(("drvHostParallelGetWinHostIoPortsSub: failed to allocate %#x bytes\n", cbData));
385
386 /* Next */
387 RES_DES hFreeResDesc = hCurLogConf;
388 rcCm = CM_Get_Next_Res_Des(&hCurLogConf, hCurLogConf, ResType_IO, 0, 0);
389 CM_Free_Res_Des_Handle(hFreeResDesc);
390 if (rcCm != CR_SUCCESS)
391 {
392 if (rcCm != CR_NO_MORE_RES_DES)
393 LogRel(("drvHostParallelGetWinHostIoPortsSub: CM_Get_Next_Res_Des failed: %u\n", rcCm));
394 break;
395 }
396 }
397 }
398 else
399 LogRel(("drvHostParallelGetWinHostIoPortsSub: Initial CM_Get_Next_Res_Des failed: %u\n", rcCm));
400 CM_Free_Log_Conf_Handle(hFirstLogConf);
401 }
402 LogFlowFunc(("return PortBase=%#x", PortBase));
403 return PortBase;
404}
405
406/**
407 * Get Parallel port address and update the shared data structure.
408 *
409 * @returns VBox status code.
410 * @param pThis The host parallel port instance data.
411 */
412static int drvHostParallelGetWinHostIoPorts(PDRVHOSTPARALLEL pThis)
413{
414 /*
415 * Assume the host device path is on the form "\\.\PIPE\LPT1", then get the "LPT1" part.
416 */
417 const char * const pszCfgPortName = RTPathFilename(pThis->pszDevicePath);
418 AssertReturn(pszCfgPortName, VERR_INTERNAL_ERROR_3);
419 size_t const cchCfgPortName = strlen(pszCfgPortName);
420 if ( cchCfgPortName != 4
421 || RTStrNICmp(pszCfgPortName, "LPT", 3) != 0
422 || !RT_C_IS_DIGIT(pszCfgPortName[3]) )
423 {
424 LogRel(("drvHostParallelGetWinHostIoPorts: The configured device name '%s' is not on the expected 'LPTx' form!\n",
425 pszCfgPortName));
426 return VERR_INVALID_NAME;
427 }
428
429 /*
430 * Get a list of devices then enumerate it looking for the LPT port we're using.
431 */
432 HDEVINFO hDevInfo = SetupDiGetClassDevs(NULL, 0, 0, DIGCF_PRESENT | DIGCF_ALLCLASSES);
433 if (hDevInfo == INVALID_HANDLE_VALUE)
434 {
435 DWORD dwErr = GetLastError();
436 LogRel(("drvHostParallelGetWinHostIoPorts: SetupDiGetClassDevs failed: %u\n", dwErr));
437 return RTErrConvertFromWin32(dwErr);
438 }
439
440 int rc = VINF_SUCCESS;
441 char *pszBuf = NULL;
442 DWORD cbBuf = 0;
443 for (int32_t idxDevInfo = 0;; idxDevInfo++)
444 {
445 /*
446 * Query the next device info.
447 */
448 SP_DEVINFO_DATA DeviceInfoData;
449 DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
450 if (!SetupDiEnumDeviceInfo(hDevInfo, idxDevInfo, &DeviceInfoData))
451 {
452 DWORD dwErr = GetLastError();
453 if (dwErr != ERROR_NO_MORE_ITEMS && dwErr != NO_ERROR)
454 {
455 LogRel(("drvHostParallelGetWinHostIoPorts: SetupDiEnumDeviceInfo failed: %u\n", dwErr));
456 rc = RTErrConvertFromWin32(dwErr);
457 }
458 break;
459 }
460
461 /* Get the friendly name of the device. */
462 DWORD dwDataType;
463 DWORD cbBufActual;
464 BOOL fOk;
465 while (!(fOk = SetupDiGetDeviceRegistryProperty(hDevInfo, &DeviceInfoData, SPDRP_FRIENDLYNAME,
466 &dwDataType, (PBYTE)pszBuf, cbBuf, &cbBufActual)))
467 {
468 DWORD dwErr = GetLastError();
469 if (dwErr == ERROR_INSUFFICIENT_BUFFER)
470 {
471 LogFlow(("ERROR_INSUFF_BUFF = %d. dwBufSz = %d\n", dwErr, cbBuf));
472 cbBuf = RT_MAX(RT_ALIGN_Z(cbBufActual + 16, 64), 256);
473 void *pvNew = RTMemRealloc(pszBuf, cbBuf);
474 if (pvNew)
475 pszBuf = (char *)pvNew;
476 else
477 {
478 LogFlow(("GetDevProp Error = %d & cbBufActual = %d\n", dwErr, cbBufActual));
479 break;
480 }
481 }
482 else
483 {
484 /* No need to bother about this error (in most cases its errno=13,
485 * INVALID_DATA . Just break from here and proceed to next device
486 * enumerated item
487 */
488 LogFlow(("GetDevProp Error = %d & cbBufActual = %d\n", dwErr, cbBufActual));
489 break;
490 }
491 }
492 if ( fOk
493 && pszBuf)
494 {
495 pszBuf[cbBuf - 1] = '\0';
496
497 /*
498 * Does this look like the port name we're looking for.
499 *
500 * We're expecting either "Parallel Port (LPT1)" or just "LPT1", though we'll make do
501 * with anything that includes the name we're looking for as a separate word.
502 */
503 char *pszMatch;
504 do
505 pszMatch = RTStrIStr(pszBuf, pszCfgPortName);
506 while ( pszMatch != NULL
507 && !( ( pszMatch == pszBuf
508 || pszMatch[-1] == '('
509 || RT_C_IS_BLANK(pszMatch[-1]))
510 && ( pszMatch[cchCfgPortName] == '\0'
511 || pszMatch[cchCfgPortName] == ')'
512 || RT_C_IS_BLANK(pszMatch[cchCfgPortName])) ) );
513 if (pszMatch != NULL)
514 {
515 RTIOPORT Port = drvHostParallelGetWinHostIoPortsSub(DeviceInfoData.DevInst);
516 if (Port != 0)
517 {
518 pThis->PortDirectData = Port;
519 pThis->PortDirectControl = Port + CTRL_REG_OFFSET;
520 pThis->PortDirectStatus = Port + STATUS_REG_OFFSET;
521 break;
522 }
523 LogRel(("drvHostParallelGetWinHostIoPorts: Addr not found for '%s'\n", pszBuf));
524 }
525 }
526 }
527
528 /* Cleanup. */
529 RTMemFree(pszBuf);
530 SetupDiDestroyDeviceInfoList(hDevInfo);
531 return rc;
532
533}
534# endif /* VBOX_WITH_WIN_PARPORT_SUP */
535
536/**
537 * Changes the current mode of the host parallel port.
538 *
539 * @returns VBox status code.
540 * @param pThis The host parallel port instance data.
541 * @param enmMode The mode to change the port to.
542 */
543static int drvHostParallelSetMode(PDRVHOSTPARALLEL pThis, PDMPARALLELPORTMODE enmMode)
544{
545 LogFlowFunc(("mode=%d\n", enmMode));
546# ifndef VBOX_WITH_WIN_PARPORT_SUP
547 int rc = VINF_SUCCESS;
548 int iMode = 0;
549 int rcLnx;
550 if (pThis->enmModeCur != enmMode)
551 {
552 switch (enmMode)
553 {
554 case PDM_PARALLEL_PORT_MODE_SPP:
555 iMode = IEEE1284_MODE_COMPAT;
556 break;
557 case PDM_PARALLEL_PORT_MODE_EPP_DATA:
558 iMode = IEEE1284_MODE_EPP | IEEE1284_DATA;
559 break;
560 case PDM_PARALLEL_PORT_MODE_EPP_ADDR:
561 iMode = IEEE1284_MODE_EPP | IEEE1284_ADDR;
562 break;
563 case PDM_PARALLEL_PORT_MODE_ECP:
564 case PDM_PARALLEL_PORT_MODE_INVALID:
565 default:
566 return VERR_NOT_SUPPORTED;
567 }
568
569 rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPSETMODE, &iMode);
570 if (RT_UNLIKELY(rcLnx < 0))
571 rc = RTErrConvertFromErrno(errno);
572 else
573 pThis->enmModeCur = enmMode;
574 }
575
576 return rc;
577# else /* VBOX_WITH_WIN_PARPORT_SUP */
578 RT_NOREF(pThis, enmMode);
579 return VINF_SUCCESS;
580# endif /* VBOX_WITH_WIN_PARPORT_SUP */
581}
582
583/* -=-=-=-=- IBase -=-=-=-=- */
584
585/**
586 * @interface_method_impl{PDMIBASE,pfnQueryInterface}
587 */
588static DECLCALLBACK(void *) drvHostParallelQueryInterface(PPDMIBASE pInterface, const char *pszIID)
589{
590 PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
591 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
592
593 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
594 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTPARALLELCONNECTOR, &pThis->CTX_SUFF(IHostParallelConnector));
595 return NULL;
596}
597
598
599/* -=-=-=-=- IHostDeviceConnector -=-=-=-=- */
600
601/**
602 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnWrite}
603 */
604static DECLCALLBACK(int)
605drvHostParallelWrite(PPDMIHOSTPARALLELCONNECTOR pInterface, const void *pvBuf, size_t cbWrite, PDMPARALLELPORTMODE enmMode)
606{
607 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
608 int rc = VINF_SUCCESS;
609
610 LogFlowFunc(("pvBuf=%#p cbWrite=%d\n", pvBuf, cbWrite));
611
612 rc = drvHostParallelSetMode(pThis, enmMode);
613 if (RT_FAILURE(rc))
614 return rc;
615# ifndef VBOX_WITH_WIN_PARPORT_SUP
616 int rcLnx = 0;
617 if (enmMode == PDM_PARALLEL_PORT_MODE_SPP)
618 {
619 /* Set the data lines directly. */
620 rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWDATA, pvBuf);
621 }
622 else
623 {
624 /* Use write interface. */
625 rcLnx = write(RTFileToNative(pThis->hFileDevice), pvBuf, cbWrite);
626 }
627 if (RT_UNLIKELY(rcLnx < 0))
628 rc = RTErrConvertFromErrno(errno);
629
630# else /* VBOX_WITH_WIN_PARPORT_SUP */
631 if (pThis->PortDirectData != 0)
632 {
633 while (cbWrite > 0)
634 {
635 size_t cbToWrite = RT_MIN(cbWrite, sizeof(pThis->abDataBuf));
636 LogFlowFunc(("Calling R0 to write %#zu bytes of data\n", cbToWrite));
637 memcpy(pThis->abDataBuf, pvBuf, cbToWrite);
638 rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_WRITE, cbToWrite);
639 AssertRC(rc);
640 pvBuf = (uint8_t const *)pvBuf + cbToWrite;
641 cbWrite -= cbToWrite;
642 }
643 }
644# endif /* VBOX_WITH_WIN_PARPORT_SUP */
645 return rc;
646}
647
648/**
649 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnRead}
650 */
651static DECLCALLBACK(int)
652drvHostParallelRead(PPDMIHOSTPARALLELCONNECTOR pInterface, void *pvBuf, size_t cbRead, PDMPARALLELPORTMODE enmMode)
653{
654 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
655 int rc = VINF_SUCCESS;
656
657# ifndef VBOX_WITH_WIN_PARPORT_SUP
658 int rcLnx = 0;
659 LogFlowFunc(("pvBuf=%#p cbRead=%d\n", pvBuf, cbRead));
660
661 rc = drvHostParallelSetMode(pThis, enmMode);
662 if (RT_FAILURE(rc))
663 return rc;
664
665 if (enmMode == PDM_PARALLEL_PORT_MODE_SPP)
666 {
667 /* Set the data lines directly. */
668 rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWDATA, pvBuf);
669 }
670 else
671 {
672 /* Use write interface. */
673 rcLnx = read(RTFileToNative(pThis->hFileDevice), pvBuf, cbRead);
674 }
675 if (RT_UNLIKELY(rcLnx < 0))
676 rc = RTErrConvertFromErrno(errno);
677
678# else /* VBOX_WITH_WIN_PARPORT_SUP */
679 RT_NOREF(enmMode);
680 if (pThis->PortDirectData != 0)
681 {
682 while (cbRead > 0)
683 {
684 size_t cbToRead = RT_MIN(cbRead, sizeof(pThis->abDataBuf));
685 LogFlowFunc(("Calling R0 to read %#zu bytes of data\n", cbToRead));
686 memset(pThis->abDataBuf, 0, cbToRead);
687 rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READ, cbToRead);
688 AssertRC(rc);
689 memcpy(pvBuf, pThis->abDataBuf, cbToRead);
690 pvBuf = (uint8_t *)pvBuf + cbToRead;
691 cbRead -= cbToRead;
692 }
693 }
694# endif /* VBOX_WITH_WIN_PARPORT_SUP */
695 return rc;
696}
697
698/**
699 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnSetPortDirection}
700 */
701static DECLCALLBACK(int) drvHostParallelSetPortDirection(PPDMIHOSTPARALLELCONNECTOR pInterface, bool fForward)
702{
703 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
704 int rc = VINF_SUCCESS;
705 int iMode = 0;
706 if (!fForward)
707 iMode = 1;
708# ifndef VBOX_WITH_WIN_PARPORT_SUP
709 int rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPDATADIR, &iMode);
710 if (RT_UNLIKELY(rcLnx < 0))
711 rc = RTErrConvertFromErrno(errno);
712
713# else /* VBOX_WITH_WIN_PARPORT_SUP */
714 if (pThis->PortDirectData != 0)
715 {
716 LogFlowFunc(("calling R0 to write CTRL, data=%#x\n", iMode));
717 rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_SETPORTDIRECTION, iMode);
718 AssertRC(rc);
719 }
720# endif /* VBOX_WITH_WIN_PARPORT_SUP */
721 return rc;
722}
723
724/**
725 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnWriteControl}
726 */
727static DECLCALLBACK(int) drvHostParallelWriteControl(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t fReg)
728{
729 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
730 int rc = VINF_SUCCESS;
731
732 LogFlowFunc(("fReg=%#x\n", fReg));
733# ifndef VBOX_WITH_WIN_PARPORT_SUP
734 int rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPWCONTROL, &fReg);
735 if (RT_UNLIKELY(rcLnx < 0))
736 rc = RTErrConvertFromErrno(errno);
737# else /* VBOX_WITH_WIN_PARPORT_SUP */
738 if (pThis->PortDirectData != 0)
739 {
740 LogFlowFunc(("calling R0 to write CTRL, data=%#x\n", fReg));
741 rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_WRITECONTROL, fReg);
742 AssertRC(rc);
743 }
744# endif /* VBOX_WITH_WIN_PARPORT_SUP */
745 return rc;
746}
747
748
749/**
750 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnReadControl}
751 */
752static DECLCALLBACK(int) drvHostParallelReadControl(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t *pfReg)
753{
754 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
755 int rc = VINF_SUCCESS;
756
757# ifndef VBOX_WITH_WIN_PARPORT_SUP
758 uint8_t fReg = 0;
759 int rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPRCONTROL, &fReg);
760 if (RT_UNLIKELY(rcLnx < 0))
761 rc = RTErrConvertFromErrno(errno);
762 else
763 {
764 LogFlowFunc(("fReg=%#x\n", fReg));
765 *pfReg = fReg;
766 }
767# else /* VBOX_WITH_WIN_PARPORT_SUP */
768 *pfReg = 0; /* Initialize the buffer*/
769 if (pThis->PortDirectData != 0)
770 {
771 LogFlowFunc(("calling R0 to read control from parallel port\n"));
772 rc = PDMDrvHlpCallR0(pThis-> CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READCONTROL, 0);
773 AssertRC(rc);
774 *pfReg = pThis->bReadInControl;
775 }
776# endif /* VBOX_WITH_WIN_PARPORT_SUP */
777 return rc;
778}
779
780/**
781 * @interface_method_impl{PDMIHOSTPARALLELCONNECTOR,pfnReadStatus}
782 */
783static DECLCALLBACK(int) drvHostParallelReadStatus(PPDMIHOSTPARALLELCONNECTOR pInterface, uint8_t *pfReg)
784{
785 PDRVHOSTPARALLEL pThis = RT_FROM_MEMBER(pInterface, DRVHOSTPARALLEL, CTX_SUFF(IHostParallelConnector));
786 int rc = VINF_SUCCESS;
787# ifndef VBOX_WITH_WIN_PARPORT_SUP
788 uint8_t fReg = 0;
789 int rcLnx = ioctl(RTFileToNative(pThis->hFileDevice), PPRSTATUS, &fReg);
790 if (RT_UNLIKELY(rcLnx < 0))
791 rc = RTErrConvertFromErrno(errno);
792 else
793 {
794 LogFlowFunc(("fReg=%#x\n", fReg));
795 *pfReg = fReg;
796 }
797# else /* VBOX_WITH_WIN_PARPORT_SUP */
798 *pfReg = 0; /* Intialize the buffer. */
799 if (pThis->PortDirectData != 0)
800 {
801 LogFlowFunc(("calling R0 to read status from parallel port\n"));
802 rc = PDMDrvHlpCallR0(pThis->CTX_SUFF(pDrvIns), DRVHOSTPARALLELR0OP_READSTATUS, 0);
803 AssertRC(rc);
804 *pfReg = pThis->bReadInStatus;
805 }
806# endif /* VBOX_WITH_WIN_PARPORT_SUP */
807 return rc;
808}
809
810# ifndef VBOX_WITH_WIN_PARPORT_SUP
811
812static DECLCALLBACK(int) drvHostParallelMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
813{
814 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
815 struct pollfd aFDs[2];
816
817 /*
818 * We can wait for interrupts using poll on linux hosts.
819 */
820 while (pThread->enmState == PDMTHREADSTATE_RUNNING)
821 {
822 int rc;
823
824 aFDs[0].fd = RTFileToNative(pThis->hFileDevice);
825 aFDs[0].events = POLLIN;
826 aFDs[0].revents = 0;
827 aFDs[1].fd = RTPipeToNative(pThis->hWakeupPipeR);
828 aFDs[1].events = POLLIN | POLLERR | POLLHUP;
829 aFDs[1].revents = 0;
830 rc = poll(aFDs, RT_ELEMENTS(aFDs), -1);
831 if (rc < 0)
832 {
833 AssertMsgFailed(("poll failed with rc=%d\n", RTErrConvertFromErrno(errno)));
834 return RTErrConvertFromErrno(errno);
835 }
836
837 if (pThread->enmState != PDMTHREADSTATE_RUNNING)
838 break;
839 if (rc > 0 && aFDs[1].revents)
840 {
841 if (aFDs[1].revents & (POLLHUP | POLLERR | POLLNVAL))
842 break;
843 /* notification to terminate -- drain the pipe */
844 char ch;
845 size_t cbRead;
846 RTPipeRead(pThis->hWakeupPipeR, &ch, 1, &cbRead);
847 continue;
848 }
849
850 /* Interrupt occurred. */
851 rc = pThis->pDrvHostParallelPort->pfnNotifyInterrupt(pThis->pDrvHostParallelPort);
852 AssertRC(rc);
853 }
854
855 return VINF_SUCCESS;
856}
857
858/**
859 * Unblock the monitor thread so it can respond to a state change.
860 *
861 * @returns a VBox status code.
862 * @param pDrvIns The driver instance.
863 * @param pThread The send thread.
864 */
865static DECLCALLBACK(int) drvHostParallelWakeupMonitorThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
866{
867 RT_NOREF(pThread);
868 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
869 size_t cbIgnored;
870 return RTPipeWrite(pThis->hWakeupPipeW, "", 1, &cbIgnored);
871}
872
873# endif /* VBOX_WITH_WIN_PARPORT_SUP */
874
875/**
876 * Destruct a host parallel driver instance.
877 *
878 * Most VM resources are freed by the VM. This callback is provided so that
879 * any non-VM resources can be freed correctly.
880 *
881 * @param pDrvIns The driver instance data.
882 */
883static DECLCALLBACK(void) drvHostParallelDestruct(PPDMDRVINS pDrvIns)
884{
885 PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
886 LogFlowFunc(("iInstance=%d\n", pDrvIns->iInstance));
887
888#ifndef VBOX_WITH_WIN_PARPORT_SUP
889 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
890 if (pThis->hFileDevice != NIL_RTFILE)
891 ioctl(RTFileToNative(pThis->hFileDevice), PPRELEASE);
892
893 if (pThis->hWakeupPipeW != NIL_RTPIPE)
894 {
895 int rc = RTPipeClose(pThis->hWakeupPipeW); AssertRC(rc);
896 pThis->hWakeupPipeW = NIL_RTPIPE;
897 }
898
899 if (pThis->hWakeupPipeR != NIL_RTPIPE)
900 {
901 int rc = RTPipeClose(pThis->hWakeupPipeR); AssertRC(rc);
902 pThis->hWakeupPipeR = NIL_RTPIPE;
903 }
904
905 if (pThis->hFileDevice != NIL_RTFILE)
906 {
907 int rc = RTFileClose(pThis->hFileDevice); AssertRC(rc);
908 pThis->hFileDevice = NIL_RTFILE;
909 }
910
911 if (pThis->pszDevicePath)
912 {
913 PDMDrvHlpMMHeapFree(pDrvIns, pThis->pszDevicePath);
914 pThis->pszDevicePath = NULL;
915 }
916#endif /* !VBOX_WITH_WIN_PARPORT_SUP */
917}
918
919/**
920 * Construct a host parallel driver instance.
921 *
922 * @copydoc FNPDMDRVCONSTRUCT
923 */
924static DECLCALLBACK(int) drvHostParallelConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
925{
926 RT_NOREF(fFlags);
927 PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
928 PDRVHOSTPARALLEL pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTPARALLEL);
929 PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
930 LogFlowFunc(("iInstance=%d\n", pDrvIns->iInstance));
931
932
933 /*
934 * Init basic data members and interfaces.
935 *
936 * Must be done before returning any failure because we've got a destructor.
937 */
938 pThis->hFileDevice = NIL_RTFILE;
939#ifndef VBOX_WITH_WIN_PARPORT_SUP
940 pThis->hWakeupPipeR = NIL_RTPIPE;
941 pThis->hWakeupPipeW = NIL_RTPIPE;
942#endif
943
944 pThis->pDrvInsR3 = pDrvIns;
945#ifdef VBOX_WITH_DRVINTNET_IN_R0
946 pThis->pDrvInsR0 = PDMDRVINS_2_R0PTR(pDrvIns);
947#endif
948
949 /* IBase. */
950 pDrvIns->IBase.pfnQueryInterface = drvHostParallelQueryInterface;
951 /* IHostParallelConnector. */
952 pThis->IHostParallelConnectorR3.pfnWrite = drvHostParallelWrite;
953 pThis->IHostParallelConnectorR3.pfnRead = drvHostParallelRead;
954 pThis->IHostParallelConnectorR3.pfnSetPortDirection = drvHostParallelSetPortDirection;
955 pThis->IHostParallelConnectorR3.pfnWriteControl = drvHostParallelWriteControl;
956 pThis->IHostParallelConnectorR3.pfnReadControl = drvHostParallelReadControl;
957 pThis->IHostParallelConnectorR3.pfnReadStatus = drvHostParallelReadStatus;
958
959 /*
960 * Validate the config.
961 */
962 PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "DevicePath", "");
963
964 /*
965 * Query configuration.
966 */
967 /* Device */
968 int rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "DevicePath", &pThis->pszDevicePath);
969 if (RT_FAILURE(rc))
970 {
971 AssertMsgFailed(("Configuration error: query for \"DevicePath\" string returned %Rra.\n", rc));
972 return rc;
973 }
974
975 /*
976 * Open the device
977 */
978 /** @todo exclusive access on windows? */
979 rc = RTFileOpen(&pThis->hFileDevice, pThis->pszDevicePath, RTFILE_O_READWRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE);
980 if (RT_FAILURE(rc))
981 return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("Parallel#%d could not open '%s'"),
982 pDrvIns->iInstance, pThis->pszDevicePath);
983
984#ifndef VBOX_WITH_WIN_PARPORT_SUP
985 /*
986 * Try to get exclusive access to parallel port
987 */
988 rc = ioctl(RTFileToNative(pThis->hFileDevice), PPEXCL);
989 if (rc < 0)
990 return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
991 N_("Parallel#%d could not get exclusive access for parallel port '%s'"
992 "Be sure that no other process or driver accesses this port"),
993 pDrvIns->iInstance, pThis->pszDevicePath);
994
995 /*
996 * Claim the parallel port
997 */
998 rc = ioctl(RTFileToNative(pThis->hFileDevice), PPCLAIM);
999 if (rc < 0)
1000 return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
1001 N_("Parallel#%d could not claim parallel port '%s'"
1002 "Be sure that no other process or driver accesses this port"),
1003 pDrvIns->iInstance, pThis->pszDevicePath);
1004
1005 /*
1006 * Get the IHostParallelPort interface of the above driver/device.
1007 */
1008 pThis->pDrvHostParallelPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIHOSTPARALLELPORT);
1009 if (!pThis->pDrvHostParallelPort)
1010 return PDMDrvHlpVMSetError(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE, RT_SRC_POS, N_("Parallel#%d has no parallel port interface above"),
1011 pDrvIns->iInstance);
1012
1013 /*
1014 * Create wakeup pipe.
1015 */
1016 rc = RTPipeCreate(&pThis->hWakeupPipeR, &pThis->hWakeupPipeW, 0 /*fFlags*/);
1017 AssertRCReturn(rc, rc);
1018
1019 /*
1020 * Start in SPP mode.
1021 */
1022 pThis->enmModeCur = PDM_PARALLEL_PORT_MODE_INVALID;
1023 rc = drvHostParallelSetMode(pThis, PDM_PARALLEL_PORT_MODE_SPP);
1024 if (RT_FAILURE(rc))
1025 return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostParallel#%d cannot change mode of parallel mode to SPP"), pDrvIns->iInstance);
1026
1027 /*
1028 * Start waiting for interrupts.
1029 */
1030 rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pMonitorThread, pThis, drvHostParallelMonitorThread, drvHostParallelWakeupMonitorThread, 0,
1031 RTTHREADTYPE_IO, "ParMon");
1032 if (RT_FAILURE(rc))
1033 return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("HostParallel#%d cannot create monitor thread"), pDrvIns->iInstance);
1034
1035#else /* VBOX_WITH_WIN_PARPORT_SUP */
1036
1037 pThis->PortDirectData = 0;
1038 pThis->PortDirectControl = 0;
1039 pThis->PortDirectStatus = 0;
1040 rc = drvHostParallelGetWinHostIoPorts(pThis);
1041 if (RT_FAILURE(rc))
1042 return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
1043 N_("HostParallel#%d: Could not get direct access to the host parallel port!! (rc=%Rrc)"),
1044 pDrvIns->iInstance, rc);
1045
1046#endif /* VBOX_WITH_WIN_PARPORT_SUP */
1047 return VINF_SUCCESS;
1048}
1049
1050
1051/**
1052 * Char driver registration record.
1053 */
1054const PDMDRVREG g_DrvHostParallel =
1055{
1056 /* u32Version */
1057 PDM_DRVREG_VERSION,
1058 /* szName */
1059 "HostParallel",
1060 /* szRCMod */
1061 "",
1062 /* szR0Mod */
1063 "VBoxDDR0.r0",
1064 /* pszDescription */
1065 "Parallel host driver.",
1066 /* fFlags */
1067# if defined(VBOX_WITH_WIN_PARPORT_SUP)
1068 PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT | PDM_DRVREG_FLAGS_R0,
1069# else
1070 PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1071# endif
1072 /* fClass. */
1073 PDM_DRVREG_CLASS_CHAR,
1074 /* cMaxInstances */
1075 ~0U,
1076 /* cbInstance */
1077 sizeof(DRVHOSTPARALLEL),
1078 /* pfnConstruct */
1079 drvHostParallelConstruct,
1080 /* pfnDestruct */
1081 drvHostParallelDestruct,
1082 /* pfnRelocate */
1083 NULL,
1084 /* pfnIOCtl */
1085 NULL,
1086 /* pfnPowerOn */
1087 NULL,
1088 /* pfnReset */
1089 NULL,
1090 /* pfnSuspend */
1091 NULL,
1092 /* pfnResume */
1093 NULL,
1094 /* pfnAttach */
1095 NULL,
1096 /* pfnDetach */
1097 NULL,
1098 /* pfnPowerOff */
1099 NULL,
1100 /* pfnSoftReset */
1101 NULL,
1102 /* u32EndVersion */
1103 PDM_DRVREG_VERSION
1104};
1105#endif /*IN_RING3*/
1106
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