IOMAll.cpp@ 62338

Last change on this file since 62338 was 60874, checked in by vboxsync, 8 years ago
IOMRC.cpp,++: Use IEM for IN and OUT too, cleaning out unnecessary code.
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File size: 27.6 KB

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1	/* $Id: IOMAll.cpp 60874 2016-05-07 17:55:21Z vboxsync $ */
2	/** @file
3	* IOM - Input / Output Monitor - Any Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 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
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_IOM
23	#include <VBox/vmm/iom.h>
24	#include <VBox/vmm/mm.h>
25	#if defined(IEM_VERIFICATION_MODE) && defined(IN_RING3)
26	# include <VBox/vmm/iem.h>
27	#endif
28	#include <VBox/param.h>
29	#include "IOMInternal.h"
30	#include <VBox/vmm/vm.h>
31	#include <VBox/vmm/vmm.h>
32	#include <VBox/vmm/selm.h>
33	#include <VBox/vmm/trpm.h>
34	#include <VBox/vmm/pdmdev.h>
35	#include <VBox/vmm/pgm.h>
36	#include <VBox/vmm/cpum.h>
37	#include <VBox/err.h>
38	#include <VBox/log.h>
39	#include <iprt/assert.h>
40	#include "IOMInline.h"
41
42
43	/**
44	* Check if this VCPU currently owns the IOM lock exclusively.
45	*
46	* @returns bool owner/not owner
47	* @param pVM The cross context VM structure.
48	*/
49	VMMDECL(bool) IOMIsLockWriteOwner(PVM pVM)
50	{
51	#ifdef IOM_WITH_CRIT_SECT_RW
52	return PDMCritSectRwIsInitialized(&pVM->iom.s.CritSect)
53	&& PDMCritSectRwIsWriteOwner(&pVM->iom.s.CritSect);
54	#else
55	return PDMCritSectIsOwner(&pVM->iom.s.CritSect);
56	#endif
57	}
58
59
60	//#undef LOG_GROUP
61	//#define LOG_GROUP LOG_GROUP_IOM_IOPORT
62
63	/**
64	* Reads an I/O port register.
65	*
66	* @returns Strict VBox status code. Informational status codes other than the one documented
67	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
68	* @retval VINF_SUCCESS Success.
69	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
70	* status code must be passed on to EM.
71	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
72	*
73	* @param pVM The cross context VM structure.
74	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
75	* @param Port The port to read.
76	* @param pu32Value Where to store the value read.
77	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
78	*/
79	VMMDECL(VBOXSTRICTRC) IOMIOPortRead(PVM pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t *pu32Value, size_t cbValue)
80	{
81	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
82
83	/** @todo should initialize *pu32Value here because it can happen that some
84	* handle is buggy and doesn't handle all cases. */
85	/* Take the IOM lock before performing any device I/O. */
86	int rc2 = IOM_LOCK_SHARED(pVM);
87	#ifndef IN_RING3
88	if (rc2 == VERR_SEM_BUSY)
89	return VINF_IOM_R3_IOPORT_READ;
90	#endif
91	AssertRC(rc2);
92	#if defined(IEM_VERIFICATION_MODE) && defined(IN_RING3)
93	IEMNotifyIOPortRead(pVM, Port, cbValue);
94	#endif
95
96	#ifdef VBOX_WITH_STATISTICS
97	/*
98	* Get the statistics record.
99	*/
100	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastRead);
101	if (!pStats \|\| pStats->Core.Key != Port)
102	{
103	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
104	if (pStats)
105	pVCpu->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
106	}
107	#endif
108
109	/*
110	* Get handler for current context.
111	*/
112	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastRead);
113	if ( !pRange
114	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
115	{
116	pRange = iomIOPortGetRange(pVM, Port);
117	if (pRange)
118	pVCpu->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
119	}
120	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
121	if (pRange)
122	{
123	/*
124	* Found a range, get the data in case we leave the IOM lock.
125	*/
126	PFNIOMIOPORTIN pfnInCallback = pRange->pfnInCallback;
127	#ifndef IN_RING3
128	if (pfnInCallback)
129	{ /* likely */ }
130	else
131	{
132	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
133	IOM_UNLOCK_SHARED(pVM);
134	return VINF_IOM_R3_IOPORT_READ;
135	}
136	#endif
137	void *pvUser = pRange->pvUser;
138	PPDMDEVINS pDevIns = pRange->pDevIns;
139	IOM_UNLOCK_SHARED(pVM);
140
141	/*
142	* Call the device.
143	*/
144	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
145	if (rcStrict == VINF_SUCCESS)
146	{ /* likely */ }
147	else
148	{
149	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
150	return rcStrict;
151	}
152	#ifdef VBOX_WITH_STATISTICS
153	if (pStats)
154	{
155	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
156	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
157	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
158	}
159	else
160	#endif
161	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
162	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
163
164	#ifdef VBOX_WITH_STATISTICS
165	if (rcStrict == VINF_SUCCESS && pStats)
166	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
167	# ifndef IN_RING3
168	else if (rcStrict == VINF_IOM_R3_IOPORT_READ && pStats)
169	STAM_COUNTER_INC(&pStats->InRZToR3);
170	# endif
171	#endif
172	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
173	{
174	/* make return value */
175	rcStrict = VINF_SUCCESS;
176	switch (cbValue)
177	{
178	case 1: (uint8_t )pu32Value = 0xff; break;
179	case 2: (uint16_t )pu32Value = 0xffff; break;
180	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
181	default:
182	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
183	return VERR_IOM_INVALID_IOPORT_SIZE;
184	}
185	}
186	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=%Rrc\n", Port, pu32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
187	return rcStrict;
188	}
189
190	#ifndef IN_RING3
191	/*
192	* Handler in ring-3?
193	*/
194	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, Port);
195	if (pRangeR3)
196	{
197	# ifdef VBOX_WITH_STATISTICS
198	if (pStats)
199	STAM_COUNTER_INC(&pStats->InRZToR3);
200	# endif
201	IOM_UNLOCK_SHARED(pVM);
202	return VINF_IOM_R3_IOPORT_READ;
203	}
204	#endif
205
206	/*
207	* Ok, no handler for this port.
208	*/
209	#ifdef VBOX_WITH_STATISTICS
210	if (pStats)
211	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
212	#endif
213
214	/* make return value */
215	switch (cbValue)
216	{
217	case 1: (uint8_t )pu32Value = 0xff; break;
218	case 2: (uint16_t )pu32Value = 0xffff; break;
219	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
220	default:
221	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
222	IOM_UNLOCK_SHARED(pVM);
223	return VERR_IOM_INVALID_IOPORT_SIZE;
224	}
225	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=VINF_SUCCESS\n", Port, pu32Value, cbValue));
226	IOM_UNLOCK_SHARED(pVM);
227	return VINF_SUCCESS;
228	}
229
230
231	/**
232	* Reads the string buffer of an I/O port register.
233	*
234	* @returns Strict VBox status code. Informational status codes other than the one documented
235	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
236	* @retval VINF_SUCCESS Success or no string I/O callback in
237	* this context.
238	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
239	* status code must be passed on to EM.
240	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
241	*
242	* @param pVM The cross context VM structure.
243	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
244	* @param uPort The port to read.
245	* @param pvDst Pointer to the destination buffer.
246	* @param pcTransfers Pointer to the number of transfer units to read, on return remaining transfer units.
247	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
248	*/
249	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortReadString(PVM pVM, PVMCPU pVCpu, RTIOPORT uPort,
250	void pvDst, uint32_t pcTransfers, unsigned cb)
251	{
252	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
253
254	/* Take the IOM lock before performing any device I/O. */
255	int rc2 = IOM_LOCK_SHARED(pVM);
256	#ifndef IN_RING3
257	if (rc2 == VERR_SEM_BUSY)
258	return VINF_IOM_R3_IOPORT_READ;
259	#endif
260	AssertRC(rc2);
261	#if defined(IEM_VERIFICATION_MODE) && defined(IN_RING3)
262	IEMNotifyIOPortReadString(pVM, uPort, pvDst, *pcTransfers, cb);
263	#endif
264
265	const uint32_t cRequestedTransfers = *pcTransfers;
266	Assert(cRequestedTransfers > 0);
267
268	#ifdef VBOX_WITH_STATISTICS
269	/*
270	* Get the statistics record.
271	*/
272	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastRead);
273	if (!pStats \|\| pStats->Core.Key != uPort)
274	{
275	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, uPort);
276	if (pStats)
277	pVCpu->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
278	}
279	#endif
280
281	/*
282	* Get handler for current context.
283	*/
284	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastRead);
285	if ( !pRange
286	\|\| (unsigned)uPort - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
287	{
288	pRange = iomIOPortGetRange(pVM, uPort);
289	if (pRange)
290	pVCpu->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
291	}
292	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
293	if (pRange)
294	{
295	/*
296	* Found a range.
297	*/
298	PFNIOMIOPORTINSTRING pfnInStrCallback = pRange->pfnInStrCallback;
299	PFNIOMIOPORTIN pfnInCallback = pRange->pfnInCallback;
300	#ifndef IN_RING3
301	if (pfnInStrCallback \|\| pfnInCallback)
302	{ /* likely */ }
303	else
304	{
305	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
306	IOM_UNLOCK_SHARED(pVM);
307	return VINF_IOM_R3_IOPORT_READ;
308	}
309	#endif
310	void *pvUser = pRange->pvUser;
311	PPDMDEVINS pDevIns = pRange->pDevIns;
312	IOM_UNLOCK_SHARED(pVM);
313
314	/*
315	* Call the device.
316	*/
317	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
318	if (rcStrict == VINF_SUCCESS)
319	{ /* likely */ }
320	else
321	{
322	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
323	return rcStrict;
324	}
325
326	/*
327	* First using the string I/O callback.
328	*/
329	if (pfnInStrCallback)
330	{
331	#ifdef VBOX_WITH_STATISTICS
332	if (pStats)
333	{
334	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
335	rcStrict = pfnInStrCallback(pDevIns, pvUser, uPort, (uint8_t *)pvDst, pcTransfers, cb);
336	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
337	}
338	else
339	#endif
340	rcStrict = pfnInStrCallback(pDevIns, pvUser, uPort, (uint8_t *)pvDst, pcTransfers, cb);
341	}
342
343	/*
344	* Then doing the single I/O fallback.
345	*/
346	if ( *pcTransfers > 0
347	&& rcStrict == VINF_SUCCESS)
348	{
349	pvDst = (uint8_t )pvDst + (cRequestedTransfers - pcTransfers) * cb;
350	do
351	{
352	uint32_t u32Value = 0;
353	#ifdef VBOX_WITH_STATISTICS
354	if (pStats)
355	{
356	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
357	rcStrict = pfnInCallback(pDevIns, pvUser, uPort, &u32Value, cb);
358	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
359	}
360	else
361	#endif
362	rcStrict = pfnInCallback(pDevIns, pvUser, uPort, &u32Value, cb);
363	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
364	{
365	u32Value = UINT32_MAX;
366	rcStrict = VINF_SUCCESS;
367	}
368	if (IOM_SUCCESS(rcStrict))
369	{
370	switch (cb)
371	{
372	case 4: (uint32_t )pvDst = u32Value; pvDst = (uint8_t *)pvDst + 4; break;
373	case 2: (uint16_t )pvDst = (uint16_t)u32Value; pvDst = (uint8_t *)pvDst + 2; break;
374	case 1: (uint8_t )pvDst = (uint8_t )u32Value; pvDst = (uint8_t *)pvDst + 1; break;
375	default: AssertFailed();
376	}
377	*pcTransfers -= 1;
378	}
379	} while ( *pcTransfers > 0
380	&& rcStrict == VINF_SUCCESS);
381	}
382	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
383
384	#ifdef VBOX_WITH_STATISTICS
385	if (rcStrict == VINF_SUCCESS && pStats)
386	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
387	# ifndef IN_RING3
388	else if (rcStrict == VINF_IOM_R3_IOPORT_READ && pStats)
389	STAM_COUNTER_INC(&pStats->InRZToR3);
390	# endif
391	#endif
392	Log3(("IOMIOPortReadStr: uPort=%RTiop pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=%Rrc\n",
393	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
394	return rcStrict;
395	}
396
397	#ifndef IN_RING3
398	/*
399	* Handler in ring-3?
400	*/
401	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, uPort);
402	if (pRangeR3)
403	{
404	# ifdef VBOX_WITH_STATISTICS
405	if (pStats)
406	STAM_COUNTER_INC(&pStats->InRZToR3);
407	# endif
408	IOM_UNLOCK_SHARED(pVM);
409	return VINF_IOM_R3_IOPORT_READ;
410	}
411	#endif
412
413	/*
414	* Ok, no handler for this port.
415	*/
416	*pcTransfers = 0;
417	memset(pvDst, 0xff, cRequestedTransfers * cb);
418	#ifdef VBOX_WITH_STATISTICS
419	if (pStats)
420	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
421	#endif
422	Log3(("IOMIOPortReadStr: uPort=%RTiop (unused) pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
423	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
424	IOM_UNLOCK_SHARED(pVM);
425	return VINF_SUCCESS;
426	}
427
428
429	#ifndef IN_RING3
430	/**
431	* Defers a pending I/O port write to ring-3.
432	*
433	* @returns VINF_IOM_R3_IOPORT_COMMIT_WRITE
434	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
435	* @param Port The port to write to.
436	* @param u32Value The value to write.
437	* @param cbValue The size of the value (1, 2, 4).
438	*/
439	static VBOXSTRICTRC iomIOPortRing3WritePending(PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
440	{
441	Log5(("iomIOPortRing3WritePending: %#x LB %u -> %RTiop\n", u32Value, cbValue, Port));
442	AssertReturn(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0, VERR_IOM_IOPORT_IPE_1);
443	pVCpu->iom.s.PendingIOPortWrite.IOPort = Port;
444	pVCpu->iom.s.PendingIOPortWrite.u32Value = u32Value;
445	pVCpu->iom.s.PendingIOPortWrite.cbValue = (uint32_t)cbValue;
446	VMCPU_FF_SET(pVCpu, VMCPU_FF_IOM);
447	return VINF_IOM_R3_IOPORT_COMMIT_WRITE;
448	}
449	#endif
450
451
452	/**
453	* Writes to an I/O port register.
454	*
455	* @returns Strict VBox status code. Informational status codes other than the one documented
456	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
457	* @retval VINF_SUCCESS Success.
458	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
459	* status code must be passed on to EM.
460	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
461	*
462	* @param pVM The cross context VM structure.
463	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
464	* @param Port The port to write to.
465	* @param u32Value The value to write.
466	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
467	*/
468	VMMDECL(VBOXSTRICTRC) IOMIOPortWrite(PVM pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
469	{
470	#ifndef IN_RING3
471	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
472	#endif
473
474	/* Take the IOM lock before performing any device I/O. */
475	int rc2 = IOM_LOCK_SHARED(pVM);
476	#ifndef IN_RING3
477	if (rc2 == VERR_SEM_BUSY)
478	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
479	#endif
480	AssertRC(rc2);
481	#if defined(IEM_VERIFICATION_MODE) && defined(IN_RING3)
482	IEMNotifyIOPortWrite(pVM, Port, u32Value, cbValue);
483	#endif
484
485	/** @todo bird: When I get time, I'll remove the RC/R0 trees and link the RC/R0
486	* entries to the ring-3 node. */
487	#ifdef VBOX_WITH_STATISTICS
488	/*
489	* Find the statistics record.
490	*/
491	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastWrite);
492	if (!pStats \|\| pStats->Core.Key != Port)
493	{
494	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
495	if (pStats)
496	pVCpu->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
497	}
498	#endif
499
500	/*
501	* Get handler for current context.
502	*/
503	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastWrite);
504	if ( !pRange
505	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
506	{
507	pRange = iomIOPortGetRange(pVM, Port);
508	if (pRange)
509	pVCpu->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
510	}
511	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
512	if (pRange)
513	{
514	/*
515	* Found a range.
516	*/
517	PFNIOMIOPORTOUT pfnOutCallback = pRange->pfnOutCallback;
518	#ifndef IN_RING3
519	if (pfnOutCallback)
520	{ /* likely */ }
521	else
522	{
523	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
524	IOM_UNLOCK_SHARED(pVM);
525	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
526	}
527	#endif
528	void *pvUser = pRange->pvUser;
529	PPDMDEVINS pDevIns = pRange->pDevIns;
530	IOM_UNLOCK_SHARED(pVM);
531
532	/*
533	* Call the device.
534	*/
535	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
536	if (rcStrict == VINF_SUCCESS)
537	{ /* likely */ }
538	else
539	{
540	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
541	#ifndef IN_RING3
542	if (RT_LIKELY(rcStrict == VINF_IOM_R3_IOPORT_WRITE))
543	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
544	#endif
545	return rcStrict;
546	}
547	#ifdef VBOX_WITH_STATISTICS
548	if (pStats)
549	{
550	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
551	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
552	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
553	}
554	else
555	#endif
556	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
557	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
558
559	#ifdef VBOX_WITH_STATISTICS
560	if (rcStrict == VINF_SUCCESS && pStats)
561	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
562	# ifndef IN_RING3
563	else if (rcStrict == VINF_IOM_R3_IOPORT_WRITE && pStats)
564	STAM_COUNTER_INC(&pStats->OutRZToR3);
565	# endif
566	#endif
567	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d rc=%Rrc\n", Port, u32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
568	#ifndef IN_RING3
569	if (rcStrict == VINF_IOM_R3_IOPORT_WRITE)
570	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
571	#endif
572	return rcStrict;
573	}
574
575	#ifndef IN_RING3
576	/*
577	* Handler in ring-3?
578	*/
579	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, Port);
580	if (pRangeR3)
581	{
582	# ifdef VBOX_WITH_STATISTICS
583	if (pStats)
584	STAM_COUNTER_INC(&pStats->OutRZToR3);
585	# endif
586	IOM_UNLOCK_SHARED(pVM);
587	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
588	}
589	#endif
590
591	/*
592	* Ok, no handler for that port.
593	*/
594	#ifdef VBOX_WITH_STATISTICS
595	/* statistics. */
596	if (pStats)
597	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
598	#endif
599	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d nop\n", Port, u32Value, cbValue));
600	IOM_UNLOCK_SHARED(pVM);
601	return VINF_SUCCESS;
602	}
603
604
605	/**
606	* Writes the string buffer of an I/O port register.
607	*
608	* @returns Strict VBox status code. Informational status codes other than the one documented
609	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
610	* @retval VINF_SUCCESS Success or no string I/O callback in
611	* this context.
612	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
613	* status code must be passed on to EM.
614	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
615	*
616	* @param pVM The cross context VM structure.
617	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
618	* @param uPort The port to write to.
619	* @param pvSrc The guest page to read from.
620	* @param pcTransfers Pointer to the number of transfer units to write, on
621	* return remaining transfer units.
622	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
623	*/
624	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortWriteString(PVM pVM, PVMCPU pVCpu, RTIOPORT uPort, void const *pvSrc,
625	uint32_t *pcTransfers, unsigned cb)
626	{
627	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
628	Assert(cb == 1 \|\| cb == 2 \|\| cb == 4);
629
630	/* Take the IOM lock before performing any device I/O. */
631	int rc2 = IOM_LOCK_SHARED(pVM);
632	#ifndef IN_RING3
633	if (rc2 == VERR_SEM_BUSY)
634	return VINF_IOM_R3_IOPORT_WRITE;
635	#endif
636	AssertRC(rc2);
637	#if defined(IEM_VERIFICATION_MODE) && defined(IN_RING3)
638	IEMNotifyIOPortWriteString(pVM, uPort, pvSrc, *pcTransfers, cb);
639	#endif
640
641	const uint32_t cRequestedTransfers = *pcTransfers;
642	Assert(cRequestedTransfers > 0);
643
644	#ifdef VBOX_WITH_STATISTICS
645	/*
646	* Get the statistics record.
647	*/
648	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastWrite);
649	if (!pStats \|\| pStats->Core.Key != uPort)
650	{
651	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, uPort);
652	if (pStats)
653	pVCpu->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
654	}
655	#endif
656
657	/*
658	* Get handler for current context.
659	*/
660	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastWrite);
661	if ( !pRange
662	\|\| (unsigned)uPort - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
663	{
664	pRange = iomIOPortGetRange(pVM, uPort);
665	if (pRange)
666	pVCpu->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
667	}
668	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
669	if (pRange)
670	{
671	/*
672	* Found a range.
673	*/
674	PFNIOMIOPORTOUTSTRING pfnOutStrCallback = pRange->pfnOutStrCallback;
675	PFNIOMIOPORTOUT pfnOutCallback = pRange->pfnOutCallback;
676	#ifndef IN_RING3
677	if (pfnOutStrCallback \|\| pfnOutCallback)
678	{ /* likely */ }
679	else
680	{
681	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
682	IOM_UNLOCK_SHARED(pVM);
683	return VINF_IOM_R3_IOPORT_WRITE;
684	}
685	#endif
686	void *pvUser = pRange->pvUser;
687	PPDMDEVINS pDevIns = pRange->pDevIns;
688	IOM_UNLOCK_SHARED(pVM);
689
690	/*
691	* Call the device.
692	*/
693	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
694	if (rcStrict == VINF_SUCCESS)
695	{ /* likely */ }
696	else
697	{
698	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
699	return rcStrict;
700	}
701
702	/*
703	* First using string I/O if possible.
704	*/
705	if (pfnOutStrCallback)
706	{
707	#ifdef VBOX_WITH_STATISTICS
708	if (pStats)
709	{
710	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
711	rcStrict = pfnOutStrCallback(pDevIns, pvUser, uPort, (uint8_t const *)pvSrc, pcTransfers, cb);
712	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
713	}
714	else
715	#endif
716	rcStrict = pfnOutStrCallback(pDevIns, pvUser, uPort, (uint8_t const *)pvSrc, pcTransfers, cb);
717	}
718
719	/*
720	* Then doing the single I/O fallback.
721	*/
722	if ( *pcTransfers > 0
723	&& rcStrict == VINF_SUCCESS)
724	{
725	pvSrc = (uint8_t )pvSrc + (cRequestedTransfers - pcTransfers) * cb;
726	do
727	{
728	uint32_t u32Value;
729	switch (cb)
730	{
731	case 4: u32Value = (uint32_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 4; break;
732	case 2: u32Value = (uint16_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 2; break;
733	case 1: u32Value = (uint8_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 1; break;
734	default: AssertFailed(); u32Value = UINT32_MAX;
735	}
736	#ifdef VBOX_WITH_STATISTICS
737	if (pStats)
738	{
739	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
740	rcStrict = pfnOutCallback(pDevIns, pvUser, uPort, u32Value, cb);
741	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
742	}
743	else
744	#endif
745	rcStrict = pfnOutCallback(pDevIns, pvUser, uPort, u32Value, cb);
746	if (IOM_SUCCESS(rcStrict))
747	*pcTransfers -= 1;
748	} while ( *pcTransfers > 0
749	&& rcStrict == VINF_SUCCESS);
750	}
751
752	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
753
754	#ifdef VBOX_WITH_STATISTICS
755	if (rcStrict == VINF_SUCCESS && pStats)
756	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
757	# ifndef IN_RING3
758	else if (rcStrict == VINF_IOM_R3_IOPORT_WRITE && pStats)
759	STAM_COUNTER_INC(&pStats->OutRZToR3);
760	# endif
761	#endif
762	Log3(("IOMIOPortWriteStr: uPort=%RTiop pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rcStrict=%Rrc\n",
763	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
764	return rcStrict;
765	}
766
767	#ifndef IN_RING3
768	/*
769	* Handler in ring-3?
770	*/
771	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, uPort);
772	if (pRangeR3)
773	{
774	# ifdef VBOX_WITH_STATISTICS
775	if (pStats)
776	STAM_COUNTER_INC(&pStats->OutRZToR3);
777	# endif
778	IOM_UNLOCK_SHARED(pVM);
779	return VINF_IOM_R3_IOPORT_WRITE;
780	}
781	#endif
782
783	/*
784	* Ok, no handler for this port.
785	*/
786	*pcTransfers = 0;
787	#ifdef VBOX_WITH_STATISTICS
788	if (pStats)
789	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
790	#endif
791	Log3(("IOMIOPortWriteStr: uPort=%RTiop (unused) pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
792	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
793	IOM_UNLOCK_SHARED(pVM);
794	return VINF_SUCCESS;
795	}
796
797
798	/**
799	* Fress an MMIO range after the reference counter has become zero.
800	*
801	* @param pVM The cross context VM structure.
802	* @param pRange The range to free.
803	*/
804	void iomMmioFreeRange(PVM pVM, PIOMMMIORANGE pRange)
805	{
806	MMHyperFree(pVM, pRange);
807	}
808

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source: vbox/trunk/src/VBox/VMM/VMMAll/IOMAll.cpp@ 62338

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