VBoxGuest-os2.cpp@ 62521

Last change on this file since 62521 was 62521, checked in by vboxsync, 8 years ago
(C) 2016
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1	/* $Id: VBoxGuest-os2.cpp 62521 2016-07-22 19:16:33Z vboxsync $ */
2	/** @file
3	* VBoxGuest - OS/2 specifics.
4	*/
5
6	/*
7	* Copyright (C) 2007-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	* --------------------------------------------------------------------
17	*
18	* This code is based on:
19	*
20	* VBoxDrv - OS/2 specifics.
21	*
22	* Copyright (c) 2007-2012 knut st. osmundsen <bird-src-spam@anduin.net>
23	*
24	* Permission is hereby granted, free of charge, to any person
25	* obtaining a copy of this software and associated documentation
26	* files (the "Software"), to deal in the Software without
27	* restriction, including without limitation the rights to use,
28	* copy, modify, merge, publish, distribute, sublicense, and/or sell
29	* copies of the Software, and to permit persons to whom the
30	* Software is furnished to do so, subject to the following
31	* conditions:
32	*
33	* The above copyright notice and this permission notice shall be
34	* included in all copies or substantial portions of the Software.
35	*
36	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
37	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
38	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
39	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
40	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
41	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
42	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
43	* OTHER DEALINGS IN THE SOFTWARE.
44	*/
45
46
47	/*********************************************************************************************************************************
48	* Header Files *
49	*********************************************************************************************************************************/
50	#include <os2ddk/bsekee.h>
51
52	#include "VBoxGuestInternal.h"
53	#include <VBox/version.h>
54	#include <iprt/initterm.h>
55	#include <iprt/string.h>
56	#include <iprt/spinlock.h>
57	#include <iprt/process.h>
58	#include <iprt/assert.h>
59	#include <iprt/log.h>
60	#include <iprt/memobj.h>
61	#include <iprt/mem.h>
62	#include <iprt/param.h>
63
64
65	/*********************************************************************************************************************************
66	* Global Variables *
67	*********************************************************************************************************************************/
68	/**
69	* Device extention & session data association structure.
70	*/
71	static VBOXGUESTDEVEXT g_DevExt;
72	/** The memory object for the MMIO memory. */
73	static RTR0MEMOBJ g_MemObjMMIO = NIL_RTR0MEMOBJ;
74	/** The memory mapping object the MMIO memory. */
75	static RTR0MEMOBJ g_MemMapMMIO = NIL_RTR0MEMOBJ;
76
77	/** Spinlock protecting g_apSessionHashTab. */
78	static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
79	/** Hash table */
80	static PVBOXGUESTSESSION g_apSessionHashTab[19];
81	/** Calculates the index into g_apSessionHashTab.*/
82	#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
83
84	RT_C_DECLS_BEGIN
85	/* Defined in VBoxGuestA-os2.asm */
86	extern uint32_t g_PhysMMIOBase;
87	extern uint32_t g_cbMMIO; /* 0 currently not set. */
88	extern uint16_t g_IOPortBase;
89	extern uint8_t g_bInterruptLine;
90	extern uint8_t g_bPciBusNo;
91	extern uint8_t g_bPciDevFunNo;
92	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16;
93	extern RTFAR16 g_fpfnVBoxGuestOs2IDCService16Asm;
94	#ifdef DEBUG_READ
95	/* (debugging) */
96	extern uint16_t g_offLogHead;
97	extern uint16_t volatile g_offLogTail;
98	extern uint16_t const g_cchLogMax;
99	extern char g_szLog[];
100	#endif
101	/* (init only:) */
102	extern char g_szInitText[];
103	extern uint16_t g_cchInitText;
104	extern uint16_t g_cchInitTextMax;
105	RT_C_DECLS_END
106
107
108	/*********************************************************************************************************************************
109	* Internal Functions *
110	*********************************************************************************************************************************/
111	static int vgdrvOS2MapMemory(void);
112	static VBOXOSTYPE vgdrvOS2DetectVersion(void);
113
114	/* in VBoxGuestA-os2.asm */
115	DECLASM(int) vgdrvOS2DevHlpSetIRQ(uint8_t bIRQ);
116
117
118	/**
119	* 32-bit Ring-0 initialization.
120	*
121	* This is called from VBoxGuestA-os2.asm upon the first open call to the vboxgst$ device.
122	*
123	* @returns 0 on success, non-zero on failure.
124	* @param pszArgs Pointer to the device arguments.
125	*/
126	DECLASM(int) vgdrvOS2Init(const char *pszArgs)
127	{
128	Log(("vgdrvOS2Init: pszArgs='%s' MMIO=0x%RX32 IOPort=0x%RX16 Int=%#x Bus=%#x Dev=%#x Fun=%d\n",
129	pszArgs, g_PhysMMIOBase, g_IOPortBase, g_bInterruptLine, g_bPciBusNo, g_bPciDevFunNo >> 3, g_bPciDevFunNo & 7));
130
131	/*
132	* Initialize the runtime.
133	*/
134	int rc = RTR0Init(0);
135	if (RT_SUCCESS(rc))
136	{
137	/*
138	* Process the commandline. Later.
139	*/
140	bool fVerbose = true;
141
142	/*
143	* Map the MMIO memory if found.
144	*/
145	rc = vgdrvOS2MapMemory();
146	if (RT_SUCCESS(rc))
147	{
148	/*
149	* Initialize the device extension.
150	*/
151	if (g_MemMapMMIO != NIL_RTR0MEMOBJ)
152	rc = VGDrvCommonInitDevExt(&g_DevExt, g_IOPortBase,
153	RTR0MemObjAddress(g_MemMapMMIO),
154	RTR0MemObjSize(g_MemMapMMIO),
155	vgdrvOS2DetectVersion(),
156	0);
157	else
158	rc = VGDrvCommonInitDevExt(&g_DevExt, g_IOPortBase, NULL, 0, vgdrvOS2DetectVersion(), 0);
159	if (RT_SUCCESS(rc))
160	{
161	/*
162	* Initialize the session hash table.
163	*/
164	rc = RTSpinlockCreate(&g_Spinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxGuestOS2");
165	if (RT_SUCCESS(rc))
166	{
167	/*
168	* Configure the interrupt handler.
169	*/
170	if (g_bInterruptLine)
171	{
172	rc = vgdrvOS2DevHlpSetIRQ(g_bInterruptLine);
173	if (rc)
174	{
175	Log(("vgdrvOS2DevHlpSetIRQ(%d) -> %d\n", g_bInterruptLine, rc));
176	rc = RTErrConvertFromOS2(rc);
177	}
178	}
179	if (RT_SUCCESS(rc))
180	{
181	/*
182	* Success
183	*/
184	if (fVerbose)
185	{
186	strcpy(&g_szInitText[0],
187	"\r\n"
188	"VirtualBox Guest Additions Driver for OS/2 version " VBOX_VERSION_STRING "\r\n"
189	"Copyright (C) 2008-" VBOX_C_YEAR " " VBOX_VENDOR "\r\n");
190	g_cchInitText = strlen(&g_szInitText[0]);
191	}
192	Log(("vgdrvOS2Init: Successfully loaded\n%s", g_szInitText));
193	return VINF_SUCCESS;
194	}
195
196	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: SetIrq failed for IRQ %#d, rc=%Rrc\n",
197	g_bInterruptLine, rc);
198	}
199	else
200	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTSpinlockCreate failed, rc=%Rrc\n", rc);
201	VGDrvCommonDeleteDevExt(&g_DevExt);
202	}
203	else
204	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: vgdrvOS2InitDevExt failed, rc=%Rrc\n", rc);
205
206	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
207	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
208	}
209	else
210	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: VBoxGuestOS2MapMMIO failed, rc=%Rrc\n", rc);
211	RTR0Term();
212	}
213	else
214	g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxGuest.sys: RTR0Init failed, rc=%Rrc\n", rc);
215
216	RTLogBackdoorPrintf("vgdrvOS2Init: failed rc=%Rrc - %s", rc, &g_szInitText[0]);
217	return rc;
218	}
219
220
221	/**
222	* Maps the VMMDev memory.
223	*
224	* @returns VBox status code.
225	* @retval VERR_VERSION_MISMATCH The VMMDev memory didn't meet our expectations.
226	*/
227	static int vgdrvOS2MapMemory(void)
228	{
229	const RTCCPHYS PhysMMIOBase = g_PhysMMIOBase;
230
231	/*
232	* Did we find any MMIO region (0 or NIL)?
233	*/
234	if ( !PhysMMIOBase
235	\|\| PhysMMIOBase == NIL_RTCCPHYS)
236	{
237	Assert(g_MemMapMMIO != NIL_RTR0MEMOBJ);
238	return VINF_SUCCESS;
239	}
240
241	/*
242	* Create a physical memory object for it.
243	*
244	* Since we don't know the actual size (OS/2 doesn't at least), we make
245	* a qualified guess using the VMMDEV_RAM_SIZE.
246	*/
247	size_t cb = RT_ALIGN_Z(VMMDEV_RAM_SIZE, PAGE_SIZE);
248	int rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
249	if (RT_FAILURE(rc))
250	{
251	cb = _4K;
252	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
253	}
254	if (RT_FAILURE(rc))
255	{
256	Log(("vgdrvOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc\n", PhysMMIOBase, cb, rc));
257	return rc;
258	}
259
260	/*
261	* Map the object into kernel space.
262	*
263	* We want a normal mapping with normal caching, which good in two ways. First
264	* since the API doesn't have any flags indicating how the mapping should be cached.
265	* And second, because PGM doesn't necessarily respect the cache/writethru bits
266	* anyway for normal RAM.
267	*/
268	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
269	if (RT_SUCCESS(rc))
270	{
271	/*
272	* Validate the VMM memory.
273	*/
274	VMMDevMemory pVMMDev = (VMMDevMemory )RTR0MemObjAddress(g_MemMapMMIO);
275	Assert(pVMMDev);
276	if ( pVMMDev->u32Version == VMMDEV_MEMORY_VERSION
277	&& pVMMDev->u32Size >= 32 /* just for checking sanity */)
278	{
279	/*
280	* Did we hit the correct size? If not we'll have to
281	* redo the mapping using the correct size.
282	*/
283	if (RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE) == cb)
284	return VINF_SUCCESS;
285
286	Log(("vgdrvOS2MapMemory: Actual size %#RX32 (tried %#zx)\n", pVMMDev->u32Size, cb));
287	cb = RT_ALIGN_32(pVMMDev->u32Size, PAGE_SIZE);
288
289	rc = RTR0MemObjFree(g_MemObjMMIO, true); AssertRC(rc);
290	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
291
292	rc = RTR0MemObjEnterPhys(&g_MemObjMMIO, PhysMMIOBase, cb, RTMEM_CACHE_POLICY_DONT_CARE);
293	if (RT_SUCCESS(rc))
294	{
295	rc = RTR0MemObjMapKernel(&g_MemMapMMIO, g_MemObjMMIO, (void *)-1, 0, RTMEM_PROT_READ \| RTMEM_PROT_WRITE);
296	if (RT_SUCCESS(rc))
297	return VINF_SUCCESS;
298
299	Log(("vgdrvOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc (2nd)\n", PhysMMIOBase, cb, rc));
300	}
301	else
302	Log(("vgdrvOS2MapMemory: RTR0MemObjEnterPhys(,%RCp,%zx) -> %Rrc (2nd)\n", PhysMMIOBase, cb, rc));
303	}
304	else
305	{
306	rc = VERR_VERSION_MISMATCH;
307	LogRel(("vgdrvOS2MapMemory: Bogus VMMDev memory; u32Version=%RX32 (expected %RX32) u32Size=%RX32\n",
308	pVMMDev->u32Version, VMMDEV_MEMORY_VERSION, pVMMDev->u32Size));
309	}
310	}
311	else
312	Log(("vgdrvOS2MapMemory: RTR0MemObjMapKernel [%RCp,%zx] -> %Rrc\n", PhysMMIOBase, cb, rc));
313
314	int rc2 = RTR0MemObjFree(g_MemObjMMIO, true /* fFreeMappings */); AssertRC(rc2);
315	g_MemObjMMIO = g_MemMapMMIO = NIL_RTR0MEMOBJ;
316	return rc;
317	}
318
319
320	/**
321	* Called fromn vgdrvOS2Init to determine which OS/2 version this is.
322	*
323	* @returns VBox OS/2 type.
324	*/
325	static VBOXOSTYPE vgdrvOS2DetectVersion(void)
326	{
327	VBOXOSTYPE enmOSType = VBOXOSTYPE_OS2;
328
329	#if 0 /** @todo dig up the version stuff from GIS later and verify that the numbers are actually decimal. */
330	unsigned uMajor, uMinor;
331	if (uMajor == 2)
332	{
333	if (uMinor >= 30 && uMinor < 40)
334	enmOSType = VBOXOSTYPE_OS2Warp3;
335	else if (uMinor >= 40 && uMinor < 45)
336	enmOSType = VBOXOSTYPE_OS2Warp4;
337	else if (uMinor >= 45 && uMinor < 50)
338	enmOSType = VBOXOSTYPE_OS2Warp45;
339	}
340	#endif
341	return enmOSType;
342	}
343
344
345	DECLASM(int) vgdrvOS2Open(uint16_t sfn)
346	{
347	int rc;
348	PVBOXGUESTSESSION pSession;
349
350	/*
351	* Create a new session.
352	*/
353	rc = VGDrvCommonCreateUserSession(&g_DevExt, &pSession);
354	if (RT_SUCCESS(rc))
355	{
356	pSession->sfn = sfn;
357
358	/*
359	* Insert it into the hash table.
360	*/
361	unsigned iHash = SESSION_HASH(sfn);
362	RTSpinlockAcquire(g_Spinlock);
363	pSession->pNextHash = g_apSessionHashTab[iHash];
364	g_apSessionHashTab[iHash] = pSession;
365	RTSpinlockRelease(g_Spinlock);
366	}
367
368	Log(("vgdrvOS2Open: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
369	return rc;
370	}
371
372
373	DECLASM(int) vgdrvOS2Close(uint16_t sfn)
374	{
375	Log(("vgdrvOS2Close: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
376
377	/*
378	* Remove from the hash table.
379	*/
380	PVBOXGUESTSESSION pSession;
381	const RTPROCESS Process = RTProcSelf();
382	const unsigned iHash = SESSION_HASH(sfn);
383	RTSpinlockAcquire(g_Spinlock);
384
385	pSession = g_apSessionHashTab[iHash];
386	if (pSession)
387	{
388	if ( pSession->sfn == sfn
389	&& pSession->Process == Process)
390	{
391	g_apSessionHashTab[iHash] = pSession->pNextHash;
392	pSession->pNextHash = NULL;
393	}
394	else
395	{
396	PVBOXGUESTSESSION pPrev = pSession;
397	pSession = pSession->pNextHash;
398	while (pSession)
399	{
400	if ( pSession->sfn == sfn
401	&& pSession->Process == Process)
402	{
403	pPrev->pNextHash = pSession->pNextHash;
404	pSession->pNextHash = NULL;
405	break;
406	}
407
408	/* next */
409	pPrev = pSession;
410	pSession = pSession->pNextHash;
411	}
412	}
413	}
414	RTSpinlockRelease(g_Spinlock);
415	if (!pSession)
416	{
417	Log(("VBoxGuestIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
418	return VERR_INVALID_PARAMETER;
419	}
420
421	/*
422	* Close the session.
423	*/
424	VGDrvCommonCloseSession(&g_DevExt, pSession);
425	return 0;
426	}
427
428
429	DECLASM(int) vgdrvOS2IOCtlFast(uint16_t sfn, uint8_t iFunction, int32_t *prc)
430	{
431	/*
432	* Find the session.
433	*/
434	const RTPROCESS Process = RTProcSelf();
435	const unsigned iHash = SESSION_HASH(sfn);
436	PVBOXGUESTSESSION pSession;
437
438	RTSpinlockAcquire(g_Spinlock);
439	pSession = g_apSessionHashTab[iHash];
440	if (pSession && pSession->Process != Process)
441	{
442	do pSession = pSession->pNextHash;
443	while ( pSession
444	&& ( pSession->sfn != sfn
445	\|\| pSession->Process != Process));
446	}
447	RTSpinlockRelease(g_Spinlock);
448	if (RT_UNLIKELY(!pSession))
449	{
450	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
451	return VERR_INVALID_PARAMETER;
452	}
453
454	/*
455	* Dispatch the fast IOCtl.
456	*/
457	*prc = VGDrvCommonIoCtlFast(iFunction, &g_DevExt, pSession);
458	return 0;
459	}
460
461
462	/**
463	* 32-bit IDC service routine.
464	*
465	* @returns VBox status code.
466	* @param u32Session The session handle (PVBOXGUESTSESSION).
467	* @param iFunction The requested function.
468	* @param pvData The input/output data buffer. The caller ensures that this
469	* cannot be swapped out, or that it's acceptable to take a
470	* page in fault in the current context. If the request doesn't
471	* take input or produces output, apssing NULL is okay.
472	* @param cbData The size of the data buffer.
473	* @param pcbDataReturned Where to store the amount of data that's returned.
474	* This can be NULL if pvData is NULL.
475	*
476	* @remark This is called from the 16-bit thunker as well as directly from the 32-bit clients.
477	*/
478	DECLASM(int) VGDrvOS2IDCService(uint32_t u32Session, unsigned iFunction, void pvData, size_t cbData, size_t pcbDataReturned)
479	{
480	PVBOXGUESTSESSION pSession = (PVBOXGUESTSESSION)u32Session;
481	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
482	AssertMsgReturn(pSession->sfn == 0xffff, ("%RX16\n", pSession->sfn), VERR_INVALID_HANDLE);
483	AssertMsgReturn(pSession->pDevExt == &g_DevExt, ("%p != %p\n", pSession->pDevExt, &g_DevExt), VERR_INVALID_HANDLE);
484
485	int rc;
486	switch (iFunction)
487	{
488	default:
489	rc = VGDrvCommonIoCtl(iFunction, &g_DevExt, pSession, pvData, cbData, pcbDataReturned);
490	break;
491
492	case VBOXGUEST_IOCTL_OS2_IDC_DISCONNECT:
493	pSession->sfn = 0;
494	VGDrvCommonCloseSession(&g_DevExt, pSession);
495	rc = VINF_SUCCESS;
496	break;
497	}
498	return rc;
499	}
500
501
502	/**
503	* Worker for VBoxGuestOS2IDC, it creates the kernel session.
504	*
505	* @returns Pointer to the session.
506	*/
507	DECLASM(PVBOXGUESTSESSION) vgdrvOS2IDCConnect(void)
508	{
509	PVBOXGUESTSESSION pSession;
510	int rc = VGDrvCommonCreateKernelSession(&g_DevExt, &pSession);
511	if (RT_SUCCESS(rc))
512	{
513	pSession->sfn = 0xffff;
514	return pSession;
515	}
516	return NULL;
517	}
518
519
520	DECLASM(int) vgdrvOS2IOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void pvParm, void pvData,
521	uint16_t pcbParm, uint16_t pcbData)
522	{
523	/*
524	* Find the session.
525	*/
526	const RTPROCESS Process = RTProcSelf();
527	const unsigned iHash = SESSION_HASH(sfn);
528	PVBOXGUESTSESSION pSession;
529
530	RTSpinlockAcquire(g_Spinlock);
531	pSession = g_apSessionHashTab[iHash];
532	if (pSession && pSession->Process != Process)
533	{
534	do pSession = pSession->pNextHash;
535	while ( pSession
536	&& ( pSession->sfn != sfn
537	\|\| pSession->Process != Process));
538	}
539	RTSpinlockRelease(g_Spinlock);
540	if (!pSession)
541	{
542	Log(("VBoxGuestIoctl: WHAT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
543	return VERR_INVALID_PARAMETER;
544	}
545
546	/*
547	* Verify the category and dispatch the IOCtl.
548	*
549	* The IOCtl call uses the parameter buffer as generic data input/output
550	* buffer similar to the one unix ioctl buffer argument. While the data
551	* buffer is used for passing the VBox status code back to the caller
552	* since the status codes that OS/2 accepts thru the DosDevIOCtl API is
553	* severely restricted.
554	*/
555	if (RT_LIKELY(iCat == VBOXGUEST_IOCTL_CATEGORY))
556	{
557	Log(("vgdrvOS2IOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p pcbParm=%d pcbData=%d\n", pSession, iFunction, pvParm, pvData, pcbParm, pcbData));
558	Assert(pvParm \|\| !*pcbData);
559	Assert(pvData);
560	Assert(pcbData == sizeof(int32_t)); / the return code */
561
562	/*
563	* Lock the buffers.
564	*/
565	int32_t rc;
566	KernVMLock_t ParmLock;
567	if (pvParm)
568	{
569	Assert(*pcbData);
570	rc = KernVMLock(VMDHL_WRITE, pvParm, pcbParm, &ParmLock, (KernPageList_t )-1, NULL);
571	AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvParm, *pcbParm, &ParmLock, rc), VERR_LOCK_FAILED);
572	}
573
574	#if 0 /* don't bother locking it since it's only 4 bytes (the return code). */
575	KernVMLock_t DataLock;
576	if (pvData)
577	{
578	Assert(*pcbData);
579	rc = KernVMLock(VMDHL_WRITE, pvData, pcbData, &DataLock, (KernPageList_t )-1, NULL);
580	if (rc)
581	{
582	AssertMsgFailed(("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pvData, *pcbData, &DataLock, rc));
583	KernVMUnlock(&ParmLock);
584	return VERR_LOCK_FAILED;
585	}
586	}
587	#endif
588
589	/*
590	* Process the IOCtl.
591	*/
592	size_t cbDataReturned;
593	rc = VGDrvCommonIoCtl(iFunction, &g_DevExt, pSession, pvParm, *pcbParm, &cbDataReturned);
594
595	/*
596	* Unlock the buffers.
597	*/
598	if (pvParm)
599	{
600	int rc2 = KernVMUnlock(&ParmLock);
601	AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
602	AssertMsg(cbDataReturned < _64K, ("cbDataReturned=%d\n", cbDataReturned));
603	*pcbParm = cbDataReturned;
604	}
605	#if 0
606	if (pvData)
607	{
608	int rc2 = KernVMUnlock(&DataLock);
609	AssertMsg(!rc2, ("rc2=%d\n", rc2));
610	}
611	#else
612	rc = KernCopyOut(pvData, &rc, sizeof(int32_t));
613	AssertMsgReturn(!rc, ("KernCopyOut(%p, %p, sizeof(int32_t)) -> %d\n", pvData, &rc, rc), VERR_LOCK_FAILED);
614	#endif
615
616	Log2(("vgdrvOS2IOCtl: returns VINF_SUCCESS / %d\n", rc));
617	return VINF_SUCCESS;
618	}
619	return VERR_NOT_SUPPORTED;
620	}
621
622
623	/**
624	* 32-bit ISR, called by 16-bit assembly thunker in VBoxGuestA-os2.asm.
625	*
626	* @returns true if it's our interrupt, false it isn't.
627	*/
628	DECLASM(bool) vgdrvOS2ISR(void)
629	{
630	Log(("vgdrvOS2ISR\n"));
631
632	return VGDrvCommonISR(&g_DevExt);
633	}
634
635
636	void VGDrvNativeISRMousePollEvent(PVBOXGUESTDEVEXT pDevExt)
637	{
638	/* No polling on OS/2 */
639	NOREF(pDevExt);
640	}
641
642
643	#ifdef DEBUG_READ /** @todo figure out this one once and for all... */
644
645	/**
646	* Callback for writing to the log buffer.
647	*
648	* @returns number of bytes written.
649	* @param pvArg Unused.
650	* @param pachChars Pointer to an array of utf-8 characters.
651	* @param cbChars Number of bytes in the character array pointed to by pachChars.
652	*/
653	static DECLCALLBACK(size_t) vgdrvOS2LogOutput(void pvArg, const char pachChars, size_t cbChars)
654	{
655	size_t cchWritten = 0;
656	while (cbChars-- > 0)
657	{
658	const uint16_t offLogHead = g_offLogHead;
659	const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
660	if (offLogHeadNext == g_offLogTail)
661	break; /* no */
662	g_szLog[offLogHead] = *pachChars++;
663	g_offLogHead = offLogHeadNext;
664	cchWritten++;
665	}
666	return cchWritten;
667	}
668
669
670	int SUPR0Printf(const char *pszFormat, ...)
671	{
672	va_list va;
673
674	#if 0 //def DEBUG_bird
675	va_start(va, pszFormat);
676	RTLogComPrintfV(pszFormat, va);
677	va_end(va);
678	#endif
679
680	va_start(va, pszFormat);
681	int cch = RTLogFormatV(vgdrvOS2LogOutput, NULL, pszFormat, va);
682	va_end(va);
683
684	return cch;
685	}
686
687	#endif /* DEBUG_READ */
688

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest-os2.cpp@ 62521

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