IOMAll.cpp@ 78402

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1	/* $Id: IOMAll.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* IOM - Input / Output Monitor - Any Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 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	#include <VBox/param.h>
26	#include "IOMInternal.h"
27	#include <VBox/vmm/vm.h>
28	#include <VBox/vmm/vmm.h>
29	#include <VBox/vmm/selm.h>
30	#include <VBox/vmm/trpm.h>
31	#include <VBox/vmm/pdmdev.h>
32	#include <VBox/vmm/pgm.h>
33	#include <VBox/vmm/cpum.h>
34	#include <VBox/err.h>
35	#include <VBox/log.h>
36	#include <iprt/assert.h>
37	#include <iprt/string.h>
38	#include "IOMInline.h"
39
40
41	/**
42	* Check if this VCPU currently owns the IOM lock exclusively.
43	*
44	* @returns bool owner/not owner
45	* @param pVM The cross context VM structure.
46	*/
47	VMMDECL(bool) IOMIsLockWriteOwner(PVM pVM)
48	{
49	#ifdef IOM_WITH_CRIT_SECT_RW
50	return PDMCritSectRwIsInitialized(&pVM->iom.s.CritSect)
51	&& PDMCritSectRwIsWriteOwner(&pVM->iom.s.CritSect);
52	#else
53	return PDMCritSectIsOwner(&pVM->iom.s.CritSect);
54	#endif
55	}
56
57
58	//#undef LOG_GROUP
59	//#define LOG_GROUP LOG_GROUP_IOM_IOPORT
60
61	/**
62	* Reads an I/O port register.
63	*
64	* @returns Strict VBox status code. Informational status codes other than the one documented
65	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
66	* @retval VINF_SUCCESS Success.
67	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
68	* status code must be passed on to EM.
69	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
70	*
71	* @param pVM The cross context VM structure.
72	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
73	* @param Port The port to read.
74	* @param pu32Value Where to store the value read.
75	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
76	*/
77	VMMDECL(VBOXSTRICTRC) IOMIOPortRead(PVM pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t *pu32Value, size_t cbValue)
78	{
79	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
80
81	/** @todo should initialize *pu32Value here because it can happen that some
82	* handle is buggy and doesn't handle all cases. */
83	/* Take the IOM lock before performing any device I/O. */
84	int rc2 = IOM_LOCK_SHARED(pVM);
85	#ifndef IN_RING3
86	if (rc2 == VERR_SEM_BUSY)
87	return VINF_IOM_R3_IOPORT_READ;
88	#endif
89	AssertRC(rc2);
90
91	#ifdef VBOX_WITH_STATISTICS
92	/*
93	* Get the statistics record.
94	*/
95	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastRead);
96	if (!pStats \|\| pStats->Core.Key != Port)
97	{
98	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
99	if (pStats)
100	pVCpu->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
101	}
102	#endif
103
104	/*
105	* Get handler for current context.
106	*/
107	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastRead);
108	if ( !pRange
109	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
110	{
111	pRange = iomIOPortGetRange(pVM, Port);
112	if (pRange)
113	pVCpu->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
114	}
115	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
116	if (pRange)
117	{
118	/*
119	* Found a range, get the data in case we leave the IOM lock.
120	*/
121	PFNIOMIOPORTIN pfnInCallback = pRange->pfnInCallback;
122	#ifndef IN_RING3
123	if (pfnInCallback)
124	{ /* likely */ }
125	else
126	{
127	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
128	IOM_UNLOCK_SHARED(pVM);
129	return VINF_IOM_R3_IOPORT_READ;
130	}
131	#endif
132	void *pvUser = pRange->pvUser;
133	PPDMDEVINS pDevIns = pRange->pDevIns;
134	IOM_UNLOCK_SHARED(pVM);
135
136	/*
137	* Call the device.
138	*/
139	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
140	if (rcStrict == VINF_SUCCESS)
141	{ /* likely */ }
142	else
143	{
144	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
145	return rcStrict;
146	}
147	#ifdef VBOX_WITH_STATISTICS
148	if (pStats)
149	{
150	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
151	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
152	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
153	}
154	else
155	#endif
156	rcStrict = pfnInCallback(pDevIns, pvUser, Port, pu32Value, (unsigned)cbValue);
157	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
158
159	#ifdef VBOX_WITH_STATISTICS
160	if (rcStrict == VINF_SUCCESS && pStats)
161	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
162	# ifndef IN_RING3
163	else if (rcStrict == VINF_IOM_R3_IOPORT_READ && pStats)
164	STAM_COUNTER_INC(&pStats->InRZToR3);
165	# endif
166	#endif
167	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
168	{
169	/* make return value */
170	rcStrict = VINF_SUCCESS;
171	switch (cbValue)
172	{
173	case 1: (uint8_t )pu32Value = 0xff; break;
174	case 2: (uint16_t )pu32Value = 0xffff; break;
175	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
176	default:
177	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
178	return VERR_IOM_INVALID_IOPORT_SIZE;
179	}
180	}
181	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=%Rrc\n", Port, pu32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
182	return rcStrict;
183	}
184
185	#ifndef IN_RING3
186	/*
187	* Handler in ring-3?
188	*/
189	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, Port);
190	if (pRangeR3)
191	{
192	# ifdef VBOX_WITH_STATISTICS
193	if (pStats)
194	STAM_COUNTER_INC(&pStats->InRZToR3);
195	# endif
196	IOM_UNLOCK_SHARED(pVM);
197	return VINF_IOM_R3_IOPORT_READ;
198	}
199	#endif
200
201	/*
202	* Ok, no handler for this port.
203	*/
204	#ifdef VBOX_WITH_STATISTICS
205	if (pStats)
206	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
207	#endif
208
209	/* make return value */
210	switch (cbValue)
211	{
212	case 1: (uint8_t )pu32Value = 0xff; break;
213	case 2: (uint16_t )pu32Value = 0xffff; break;
214	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
215	default:
216	AssertMsgFailed(("Invalid I/O port size %d. Port=%d\n", cbValue, Port));
217	IOM_UNLOCK_SHARED(pVM);
218	return VERR_IOM_INVALID_IOPORT_SIZE;
219	}
220	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=VINF_SUCCESS\n", Port, pu32Value, cbValue));
221	IOM_UNLOCK_SHARED(pVM);
222	return VINF_SUCCESS;
223	}
224
225
226	/**
227	* Reads the string buffer of an I/O port register.
228	*
229	* @returns Strict VBox status code. Informational status codes other than the one documented
230	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
231	* @retval VINF_SUCCESS Success or no string I/O callback in
232	* this context.
233	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
234	* status code must be passed on to EM.
235	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
236	*
237	* @param pVM The cross context VM structure.
238	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
239	* @param uPort The port to read.
240	* @param pvDst Pointer to the destination buffer.
241	* @param pcTransfers Pointer to the number of transfer units to read, on return remaining transfer units.
242	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
243	*/
244	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortReadString(PVM pVM, PVMCPU pVCpu, RTIOPORT uPort,
245	void pvDst, uint32_t pcTransfers, unsigned cb)
246	{
247	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
248
249	/* Take the IOM lock before performing any device I/O. */
250	int rc2 = IOM_LOCK_SHARED(pVM);
251	#ifndef IN_RING3
252	if (rc2 == VERR_SEM_BUSY)
253	return VINF_IOM_R3_IOPORT_READ;
254	#endif
255	AssertRC(rc2);
256
257	const uint32_t cRequestedTransfers = *pcTransfers;
258	Assert(cRequestedTransfers > 0);
259
260	#ifdef VBOX_WITH_STATISTICS
261	/*
262	* Get the statistics record.
263	*/
264	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastRead);
265	if (!pStats \|\| pStats->Core.Key != uPort)
266	{
267	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, uPort);
268	if (pStats)
269	pVCpu->iom.s.CTX_SUFF(pStatsLastRead) = pStats;
270	}
271	#endif
272
273	/*
274	* Get handler for current context.
275	*/
276	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastRead);
277	if ( !pRange
278	\|\| (unsigned)uPort - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
279	{
280	pRange = iomIOPortGetRange(pVM, uPort);
281	if (pRange)
282	pVCpu->iom.s.CTX_SUFF(pRangeLastRead) = pRange;
283	}
284	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
285	if (pRange)
286	{
287	/*
288	* Found a range.
289	*/
290	PFNIOMIOPORTINSTRING pfnInStrCallback = pRange->pfnInStrCallback;
291	PFNIOMIOPORTIN pfnInCallback = pRange->pfnInCallback;
292	#ifndef IN_RING3
293	if (pfnInStrCallback \|\| pfnInCallback)
294	{ /* likely */ }
295	else
296	{
297	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
298	IOM_UNLOCK_SHARED(pVM);
299	return VINF_IOM_R3_IOPORT_READ;
300	}
301	#endif
302	void *pvUser = pRange->pvUser;
303	PPDMDEVINS pDevIns = pRange->pDevIns;
304	IOM_UNLOCK_SHARED(pVM);
305
306	/*
307	* Call the device.
308	*/
309	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
310	if (rcStrict == VINF_SUCCESS)
311	{ /* likely */ }
312	else
313	{
314	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->InRZToR3); });
315	return rcStrict;
316	}
317
318	/*
319	* First using the string I/O callback.
320	*/
321	if (pfnInStrCallback)
322	{
323	#ifdef VBOX_WITH_STATISTICS
324	if (pStats)
325	{
326	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
327	rcStrict = pfnInStrCallback(pDevIns, pvUser, uPort, (uint8_t *)pvDst, pcTransfers, cb);
328	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
329	}
330	else
331	#endif
332	rcStrict = pfnInStrCallback(pDevIns, pvUser, uPort, (uint8_t *)pvDst, pcTransfers, cb);
333	}
334
335	/*
336	* Then doing the single I/O fallback.
337	*/
338	if ( *pcTransfers > 0
339	&& rcStrict == VINF_SUCCESS)
340	{
341	pvDst = (uint8_t )pvDst + (cRequestedTransfers - pcTransfers) * cb;
342	do
343	{
344	uint32_t u32Value = 0;
345	#ifdef VBOX_WITH_STATISTICS
346	if (pStats)
347	{
348	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
349	rcStrict = pfnInCallback(pDevIns, pvUser, uPort, &u32Value, cb);
350	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
351	}
352	else
353	#endif
354	rcStrict = pfnInCallback(pDevIns, pvUser, uPort, &u32Value, cb);
355	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
356	{
357	u32Value = UINT32_MAX;
358	rcStrict = VINF_SUCCESS;
359	}
360	if (IOM_SUCCESS(rcStrict))
361	{
362	switch (cb)
363	{
364	case 4: (uint32_t )pvDst = u32Value; pvDst = (uint8_t *)pvDst + 4; break;
365	case 2: (uint16_t )pvDst = (uint16_t)u32Value; pvDst = (uint8_t *)pvDst + 2; break;
366	case 1: (uint8_t )pvDst = (uint8_t )u32Value; pvDst = (uint8_t *)pvDst + 1; break;
367	default: AssertFailed();
368	}
369	*pcTransfers -= 1;
370	}
371	} while ( *pcTransfers > 0
372	&& rcStrict == VINF_SUCCESS);
373	}
374	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
375
376	#ifdef VBOX_WITH_STATISTICS
377	if (rcStrict == VINF_SUCCESS && pStats)
378	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
379	# ifndef IN_RING3
380	else if (rcStrict == VINF_IOM_R3_IOPORT_READ && pStats)
381	STAM_COUNTER_INC(&pStats->InRZToR3);
382	# endif
383	#endif
384	Log3(("IOMIOPortReadStr: uPort=%RTiop pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=%Rrc\n",
385	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
386	return rcStrict;
387	}
388
389	#ifndef IN_RING3
390	/*
391	* Handler in ring-3?
392	*/
393	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, uPort);
394	if (pRangeR3)
395	{
396	# ifdef VBOX_WITH_STATISTICS
397	if (pStats)
398	STAM_COUNTER_INC(&pStats->InRZToR3);
399	# endif
400	IOM_UNLOCK_SHARED(pVM);
401	return VINF_IOM_R3_IOPORT_READ;
402	}
403	#endif
404
405	/*
406	* Ok, no handler for this port.
407	*/
408	*pcTransfers = 0;
409	memset(pvDst, 0xff, cRequestedTransfers * cb);
410	#ifdef VBOX_WITH_STATISTICS
411	if (pStats)
412	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
413	#endif
414	Log3(("IOMIOPortReadStr: uPort=%RTiop (unused) pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
415	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
416	IOM_UNLOCK_SHARED(pVM);
417	return VINF_SUCCESS;
418	}
419
420
421	#ifndef IN_RING3
422	/**
423	* Defers a pending I/O port write to ring-3.
424	*
425	* @returns VINF_IOM_R3_IOPORT_COMMIT_WRITE
426	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
427	* @param Port The port to write to.
428	* @param u32Value The value to write.
429	* @param cbValue The size of the value (1, 2, 4).
430	*/
431	static VBOXSTRICTRC iomIOPortRing3WritePending(PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
432	{
433	Log5(("iomIOPortRing3WritePending: %#x LB %u -> %RTiop\n", u32Value, cbValue, Port));
434	AssertReturn(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0, VERR_IOM_IOPORT_IPE_1);
435	pVCpu->iom.s.PendingIOPortWrite.IOPort = Port;
436	pVCpu->iom.s.PendingIOPortWrite.u32Value = u32Value;
437	pVCpu->iom.s.PendingIOPortWrite.cbValue = (uint32_t)cbValue;
438	VMCPU_FF_SET(pVCpu, VMCPU_FF_IOM);
439	return VINF_IOM_R3_IOPORT_COMMIT_WRITE;
440	}
441	#endif
442
443
444	/**
445	* Writes to an I/O port register.
446	*
447	* @returns Strict VBox status code. Informational status codes other than the one documented
448	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
449	* @retval VINF_SUCCESS Success.
450	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
451	* status code must be passed on to EM.
452	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
453	*
454	* @param pVM The cross context VM structure.
455	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
456	* @param Port The port to write to.
457	* @param u32Value The value to write.
458	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
459	*/
460	VMMDECL(VBOXSTRICTRC) IOMIOPortWrite(PVM pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
461	{
462	#ifndef IN_RING3
463	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
464	#endif
465
466	/* Take the IOM lock before performing any device I/O. */
467	int rc2 = IOM_LOCK_SHARED(pVM);
468	#ifndef IN_RING3
469	if (rc2 == VERR_SEM_BUSY)
470	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
471	#endif
472	AssertRC(rc2);
473
474	/** @todo bird: When I get time, I'll remove the RC/R0 trees and link the RC/R0
475	* entries to the ring-3 node. */
476	#ifdef VBOX_WITH_STATISTICS
477	/*
478	* Find the statistics record.
479	*/
480	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastWrite);
481	if (!pStats \|\| pStats->Core.Key != Port)
482	{
483	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, Port);
484	if (pStats)
485	pVCpu->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
486	}
487	#endif
488
489	/*
490	* Get handler for current context.
491	*/
492	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastWrite);
493	if ( !pRange
494	\|\| (unsigned)Port - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
495	{
496	pRange = iomIOPortGetRange(pVM, Port);
497	if (pRange)
498	pVCpu->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
499	}
500	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
501	if (pRange)
502	{
503	/*
504	* Found a range.
505	*/
506	PFNIOMIOPORTOUT pfnOutCallback = pRange->pfnOutCallback;
507	#ifndef IN_RING3
508	if (pfnOutCallback)
509	{ /* likely */ }
510	else
511	{
512	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
513	IOM_UNLOCK_SHARED(pVM);
514	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
515	}
516	#endif
517	void *pvUser = pRange->pvUser;
518	PPDMDEVINS pDevIns = pRange->pDevIns;
519	IOM_UNLOCK_SHARED(pVM);
520
521	/*
522	* Call the device.
523	*/
524	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
525	if (rcStrict == VINF_SUCCESS)
526	{ /* likely */ }
527	else
528	{
529	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
530	#ifndef IN_RING3
531	if (RT_LIKELY(rcStrict == VINF_IOM_R3_IOPORT_WRITE))
532	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
533	#endif
534	return rcStrict;
535	}
536	#ifdef VBOX_WITH_STATISTICS
537	if (pStats)
538	{
539	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
540	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
541	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
542	}
543	else
544	#endif
545	rcStrict = pfnOutCallback(pDevIns, pvUser, Port, u32Value, (unsigned)cbValue);
546	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
547
548	#ifdef VBOX_WITH_STATISTICS
549	if (rcStrict == VINF_SUCCESS && pStats)
550	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
551	# ifndef IN_RING3
552	else if (rcStrict == VINF_IOM_R3_IOPORT_WRITE && pStats)
553	STAM_COUNTER_INC(&pStats->OutRZToR3);
554	# endif
555	#endif
556	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d rc=%Rrc\n", Port, u32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
557	#ifndef IN_RING3
558	if (rcStrict == VINF_IOM_R3_IOPORT_WRITE)
559	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
560	#endif
561	return rcStrict;
562	}
563
564	#ifndef IN_RING3
565	/*
566	* Handler in ring-3?
567	*/
568	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, Port);
569	if (pRangeR3)
570	{
571	# ifdef VBOX_WITH_STATISTICS
572	if (pStats)
573	STAM_COUNTER_INC(&pStats->OutRZToR3);
574	# endif
575	IOM_UNLOCK_SHARED(pVM);
576	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
577	}
578	#endif
579
580	/*
581	* Ok, no handler for that port.
582	*/
583	#ifdef VBOX_WITH_STATISTICS
584	/* statistics. */
585	if (pStats)
586	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
587	#endif
588	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d nop\n", Port, u32Value, cbValue));
589	IOM_UNLOCK_SHARED(pVM);
590	return VINF_SUCCESS;
591	}
592
593
594	/**
595	* Writes the string buffer of an I/O port register.
596	*
597	* @returns Strict VBox status code. Informational status codes other than the one documented
598	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
599	* @retval VINF_SUCCESS Success or no string I/O callback in
600	* this context.
601	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
602	* status code must be passed on to EM.
603	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
604	*
605	* @param pVM The cross context VM structure.
606	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
607	* @param uPort The port to write to.
608	* @param pvSrc The guest page to read from.
609	* @param pcTransfers Pointer to the number of transfer units to write, on
610	* return remaining transfer units.
611	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
612	*/
613	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortWriteString(PVM pVM, PVMCPU pVCpu, RTIOPORT uPort, void const *pvSrc,
614	uint32_t *pcTransfers, unsigned cb)
615	{
616	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
617	Assert(cb == 1 \|\| cb == 2 \|\| cb == 4);
618
619	/* Take the IOM lock before performing any device I/O. */
620	int rc2 = IOM_LOCK_SHARED(pVM);
621	#ifndef IN_RING3
622	if (rc2 == VERR_SEM_BUSY)
623	return VINF_IOM_R3_IOPORT_WRITE;
624	#endif
625	AssertRC(rc2);
626
627	const uint32_t cRequestedTransfers = *pcTransfers;
628	Assert(cRequestedTransfers > 0);
629
630	#ifdef VBOX_WITH_STATISTICS
631	/*
632	* Get the statistics record.
633	*/
634	PIOMIOPORTSTATS pStats = pVCpu->iom.s.CTX_SUFF(pStatsLastWrite);
635	if (!pStats \|\| pStats->Core.Key != uPort)
636	{
637	pStats = (PIOMIOPORTSTATS)RTAvloIOPortGet(&pVM->iom.s.CTX_SUFF(pTrees)->IOPortStatTree, uPort);
638	if (pStats)
639	pVCpu->iom.s.CTX_SUFF(pStatsLastWrite) = pStats;
640	}
641	#endif
642
643	/*
644	* Get handler for current context.
645	*/
646	CTX_SUFF(PIOMIOPORTRANGE) pRange = pVCpu->iom.s.CTX_SUFF(pRangeLastWrite);
647	if ( !pRange
648	\|\| (unsigned)uPort - (unsigned)pRange->Port >= (unsigned)pRange->cPorts)
649	{
650	pRange = iomIOPortGetRange(pVM, uPort);
651	if (pRange)
652	pVCpu->iom.s.CTX_SUFF(pRangeLastWrite) = pRange;
653	}
654	MMHYPER_RC_ASSERT_RCPTR(pVM, pRange);
655	if (pRange)
656	{
657	/*
658	* Found a range.
659	*/
660	PFNIOMIOPORTOUTSTRING pfnOutStrCallback = pRange->pfnOutStrCallback;
661	PFNIOMIOPORTOUT pfnOutCallback = pRange->pfnOutCallback;
662	#ifndef IN_RING3
663	if (pfnOutStrCallback \|\| pfnOutCallback)
664	{ /* likely */ }
665	else
666	{
667	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
668	IOM_UNLOCK_SHARED(pVM);
669	return VINF_IOM_R3_IOPORT_WRITE;
670	}
671	#endif
672	void *pvUser = pRange->pvUser;
673	PPDMDEVINS pDevIns = pRange->pDevIns;
674	IOM_UNLOCK_SHARED(pVM);
675
676	/*
677	* Call the device.
678	*/
679	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
680	if (rcStrict == VINF_SUCCESS)
681	{ /* likely */ }
682	else
683	{
684	STAM_STATS({ if (pStats) STAM_COUNTER_INC(&pStats->OutRZToR3); });
685	return rcStrict;
686	}
687
688	/*
689	* First using string I/O if possible.
690	*/
691	if (pfnOutStrCallback)
692	{
693	#ifdef VBOX_WITH_STATISTICS
694	if (pStats)
695	{
696	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
697	rcStrict = pfnOutStrCallback(pDevIns, pvUser, uPort, (uint8_t const *)pvSrc, pcTransfers, cb);
698	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
699	}
700	else
701	#endif
702	rcStrict = pfnOutStrCallback(pDevIns, pvUser, uPort, (uint8_t const *)pvSrc, pcTransfers, cb);
703	}
704
705	/*
706	* Then doing the single I/O fallback.
707	*/
708	if ( *pcTransfers > 0
709	&& rcStrict == VINF_SUCCESS)
710	{
711	pvSrc = (uint8_t )pvSrc + (cRequestedTransfers - pcTransfers) * cb;
712	do
713	{
714	uint32_t u32Value;
715	switch (cb)
716	{
717	case 4: u32Value = (uint32_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 4; break;
718	case 2: u32Value = (uint16_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 2; break;
719	case 1: u32Value = (uint8_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 1; break;
720	default: AssertFailed(); u32Value = UINT32_MAX;
721	}
722	#ifdef VBOX_WITH_STATISTICS
723	if (pStats)
724	{
725	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
726	rcStrict = pfnOutCallback(pDevIns, pvUser, uPort, u32Value, cb);
727	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
728	}
729	else
730	#endif
731	rcStrict = pfnOutCallback(pDevIns, pvUser, uPort, u32Value, cb);
732	if (IOM_SUCCESS(rcStrict))
733	*pcTransfers -= 1;
734	} while ( *pcTransfers > 0
735	&& rcStrict == VINF_SUCCESS);
736	}
737
738	PDMCritSectLeave(pDevIns->CTX_SUFF(pCritSectRo));
739
740	#ifdef VBOX_WITH_STATISTICS
741	if (rcStrict == VINF_SUCCESS && pStats)
742	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
743	# ifndef IN_RING3
744	else if (rcStrict == VINF_IOM_R3_IOPORT_WRITE && pStats)
745	STAM_COUNTER_INC(&pStats->OutRZToR3);
746	# endif
747	#endif
748	Log3(("IOMIOPortWriteStr: uPort=%RTiop pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rcStrict=%Rrc\n",
749	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
750	return rcStrict;
751	}
752
753	#ifndef IN_RING3
754	/*
755	* Handler in ring-3?
756	*/
757	PIOMIOPORTRANGER3 pRangeR3 = iomIOPortGetRangeR3(pVM, uPort);
758	if (pRangeR3)
759	{
760	# ifdef VBOX_WITH_STATISTICS
761	if (pStats)
762	STAM_COUNTER_INC(&pStats->OutRZToR3);
763	# endif
764	IOM_UNLOCK_SHARED(pVM);
765	return VINF_IOM_R3_IOPORT_WRITE;
766	}
767	#endif
768
769	/*
770	* Ok, no handler for this port.
771	*/
772	*pcTransfers = 0;
773	#ifdef VBOX_WITH_STATISTICS
774	if (pStats)
775	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
776	#endif
777	Log3(("IOMIOPortWriteStr: uPort=%RTiop (unused) pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
778	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
779	IOM_UNLOCK_SHARED(pVM);
780	return VINF_SUCCESS;
781	}
782
783
784	/**
785	* Fress an MMIO range after the reference counter has become zero.
786	*
787	* @param pVM The cross context VM structure.
788	* @param pRange The range to free.
789	*/
790	void iomMmioFreeRange(PVM pVM, PIOMMMIORANGE pRange)
791	{
792	MMHyperFree(pVM, pRange);
793	}
794

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source: vbox/trunk/src/VBox/VMM/VMMAll/IOMAll.cpp@ 78402

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