IOMAll.cpp@ 104255

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1	/* $Id: IOMAll.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* IOM - Input / Output Monitor - Any Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_IOM_IOPORT
33	#include <VBox/vmm/iom.h>
34	#include <VBox/vmm/mm.h>
35	#include <VBox/param.h>
36	#include "IOMInternal.h"
37	#include <VBox/vmm/vmcc.h>
38	#include <VBox/vmm/vmm.h>
39	#include <VBox/vmm/selm.h>
40	#include <VBox/vmm/trpm.h>
41	#include <VBox/vmm/pdmdev.h>
42	#include <VBox/vmm/pgm.h>
43	#include <VBox/vmm/cpum.h>
44	#include <VBox/err.h>
45	#include <VBox/log.h>
46	#include <iprt/assert.h>
47	#include <iprt/string.h>
48	#include "IOMInline.h"
49
50
51	/**
52	* Reads an I/O port register.
53	*
54	* @returns Strict VBox status code. Informational status codes other than the one documented
55	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
56	* @retval VINF_SUCCESS Success.
57	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
58	* status code must be passed on to EM.
59	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
60	*
61	* @param pVM The cross context VM structure.
62	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
63	* @param Port The port to read.
64	* @param pu32Value Where to store the value read.
65	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
66	*/
67	VMMDECL(VBOXSTRICTRC) IOMIOPortRead(PVMCC pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t *pu32Value, size_t cbValue)
68	{
69	STAM_COUNTER_INC(&pVM->iom.s.StatIoPortIn);
70	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
71
72	/** @todo should initialize *pu32Value here because it can happen that some
73	* handle is buggy and doesn't handle all cases. */
74
75	/* For lookups we need to share lock IOM. */
76	int rc2 = IOM_LOCK_SHARED(pVM);
77	if (RT_SUCCESS(rc2))
78	{ /* likely */ }
79	#ifndef IN_RING3
80	else if (rc2 == VERR_SEM_BUSY)
81	return VINF_IOM_R3_IOPORT_READ;
82	#endif
83	else
84	AssertMsgFailedReturn(("rc2=%Rrc\n", rc2), rc2);
85
86	/*
87	* Get the entry for the current context.
88	*/
89	uint16_t offPort;
90	CTX_SUFF(PIOMIOPORTENTRY) pRegEntry = iomIoPortGetEntry(pVM, Port, &offPort, &pVCpu->iom.s.idxIoPortLastRead);
91	if (pRegEntry)
92	{
93	#ifdef VBOX_WITH_STATISTICS
94	PIOMIOPORTSTATSENTRY pStats = iomIoPortGetStats(pVM, pRegEntry, offPort);
95	#endif
96
97	/*
98	* Found an entry, get the data so we can leave the IOM lock.
99	*/
100	uint16_t const fFlags = pRegEntry->fFlags;
101	PFNIOMIOPORTNEWIN pfnInCallback = pRegEntry->pfnInCallback;
102	PPDMDEVINS pDevIns = pRegEntry->pDevIns;
103	#ifndef IN_RING3
104	if ( pfnInCallback
105	&& pDevIns
106	&& pRegEntry->cPorts > 0)
107	{ /* likely */ }
108	else
109	{
110	STAM_COUNTER_INC(&pStats->InRZToR3);
111	IOM_UNLOCK_SHARED(pVM);
112	return VINF_IOM_R3_IOPORT_READ;
113	}
114	#endif
115	void *pvUser = pRegEntry->pvUser;
116	IOM_UNLOCK_SHARED(pVM);
117	AssertPtr(pDevIns);
118	AssertPtr(pfnInCallback);
119
120	/*
121	* Call the device.
122	*/
123	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pVM, pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
124	if (rcStrict == VINF_SUCCESS)
125	{
126	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
127	rcStrict = pfnInCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? Port : offPort, pu32Value, (unsigned)cbValue);
128	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
129	PDMCritSectLeave(pVM, pDevIns->CTX_SUFF(pCritSectRo));
130
131	#ifndef IN_RING3
132	if (rcStrict == VINF_IOM_R3_IOPORT_READ)
133	STAM_COUNTER_INC(&pStats->InRZToR3);
134	else
135	#endif
136	{
137	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
138	STAM_COUNTER_INC(&iomIoPortGetStats(pVM, pRegEntry, 0)->Total);
139	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
140	{
141	/* make return value */
142	rcStrict = VINF_SUCCESS;
143	switch (cbValue)
144	{
145	case 1: (uint8_t )pu32Value = 0xff; break;
146	case 2: (uint16_t )pu32Value = 0xffff; break;
147	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
148	default:
149	AssertMsgFailedReturn(("Invalid I/O port size %d. Port=%d\n", cbValue, Port), VERR_IOM_INVALID_IOPORT_SIZE);
150	}
151	}
152	}
153	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=%Rrc\n", Port, pu32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
154	STAM_COUNTER_INC(&iomIoPortGetStats(pVM, pRegEntry, 0)->Total);
155	}
156	else
157	STAM_COUNTER_INC(&pStats->InRZToR3);
158	return rcStrict;
159	}
160
161	/*
162	* Ok, no handler for this port.
163	*/
164	IOM_UNLOCK_SHARED(pVM);
165	switch (cbValue)
166	{
167	case 1: (uint8_t )pu32Value = 0xff; break;
168	case 2: (uint16_t )pu32Value = 0xffff; break;
169	case 4: (uint32_t )pu32Value = UINT32_C(0xffffffff); break;
170	default:
171	AssertMsgFailedReturn(("Invalid I/O port size %d. Port=%d\n", cbValue, Port), VERR_IOM_INVALID_IOPORT_SIZE);
172	}
173	Log3(("IOMIOPortRead: Port=%RTiop pu32=%08RX32 cb=%d rc=VINF_SUCCESS\n", Port, pu32Value, cbValue));
174	return VINF_SUCCESS;
175	}
176
177
178	/**
179	* Reads the string buffer of an I/O port register.
180	*
181	* @returns Strict VBox status code. Informational status codes other than the one documented
182	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
183	* @retval VINF_SUCCESS Success or no string I/O callback in
184	* this context.
185	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
186	* status code must be passed on to EM.
187	* @retval VINF_IOM_R3_IOPORT_READ Defer the read to ring-3. (R0/RC only)
188	*
189	* @param pVM The cross context VM structure.
190	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
191	* @param uPort The port to read.
192	* @param pvDst Pointer to the destination buffer.
193	* @param pcTransfers Pointer to the number of transfer units to read, on return remaining transfer units.
194	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
195	*/
196	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortReadString(PVMCC pVM, PVMCPU pVCpu, RTIOPORT uPort,
197	void pvDst, uint32_t pcTransfers, unsigned cb)
198	{
199	STAM_COUNTER_INC(&pVM->iom.s.StatIoPortInS);
200	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
201
202	/* For lookups we need to share lock IOM. */
203	int rc2 = IOM_LOCK_SHARED(pVM);
204	if (RT_SUCCESS(rc2))
205	{ /* likely */ }
206	#ifndef IN_RING3
207	else if (rc2 == VERR_SEM_BUSY)
208	return VINF_IOM_R3_IOPORT_READ;
209	#endif
210	else
211	AssertMsgFailedReturn(("rc2=%Rrc\n", rc2), rc2);
212
213	const uint32_t cRequestedTransfers = *pcTransfers;
214	Assert(cRequestedTransfers > 0);
215
216	/*
217	* Get the entry for the current context.
218	*/
219	uint16_t offPort;
220	CTX_SUFF(PIOMIOPORTENTRY) pRegEntry = iomIoPortGetEntry(pVM, uPort, &offPort, &pVCpu->iom.s.idxIoPortLastReadStr);
221	if (pRegEntry)
222	{
223	#ifdef VBOX_WITH_STATISTICS
224	PIOMIOPORTSTATSENTRY pStats = iomIoPortGetStats(pVM, pRegEntry, offPort);
225	#endif
226
227	/*
228	* Found an entry, get the data so we can leave the IOM lock.
229	*/
230	uint16_t const fFlags = pRegEntry->fFlags;
231	PFNIOMIOPORTNEWINSTRING pfnInStrCallback = pRegEntry->pfnInStrCallback;
232	PFNIOMIOPORTNEWIN pfnInCallback = pRegEntry->pfnInCallback;
233	PPDMDEVINS pDevIns = pRegEntry->pDevIns;
234	#ifndef IN_RING3
235	if ( pfnInCallback
236	&& pDevIns
237	&& pRegEntry->cPorts > 0)
238	{ /* likely */ }
239	else
240	{
241	STAM_COUNTER_INC(&pStats->InRZToR3);
242	IOM_UNLOCK_SHARED(pVM);
243	return VINF_IOM_R3_IOPORT_READ;
244	}
245	#endif
246	void *pvUser = pRegEntry->pvUser;
247	IOM_UNLOCK_SHARED(pVM);
248	AssertPtr(pDevIns);
249	AssertPtr(pfnInCallback);
250
251	/*
252	* Call the device.
253	*/
254	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pVM, pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_READ);
255	if (rcStrict == VINF_SUCCESS)
256	{
257	/*
258	* First using the string I/O callback.
259	*/
260	if (pfnInStrCallback)
261	{
262	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
263	rcStrict = pfnInStrCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? uPort : offPort,
264	(uint8_t *)pvDst, pcTransfers, cb);
265	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
266	}
267
268	/*
269	* Then doing the single I/O fallback.
270	*/
271	if ( *pcTransfers > 0
272	&& rcStrict == VINF_SUCCESS)
273	{
274	pvDst = (uint8_t )pvDst + (cRequestedTransfers - pcTransfers) * cb;
275	do
276	{
277	uint32_t u32Value = 0;
278	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfIn), a);
279	rcStrict = pfnInCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? uPort : offPort, &u32Value, cb);
280	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfIn), a);
281	if (rcStrict == VERR_IOM_IOPORT_UNUSED)
282	{
283	u32Value = UINT32_MAX;
284	rcStrict = VINF_SUCCESS;
285	}
286	if (IOM_SUCCESS(rcStrict))
287	{
288	switch (cb)
289	{
290	case 4: (uint32_t )pvDst = u32Value; pvDst = (uint8_t *)pvDst + 4; break;
291	case 2: (uint16_t )pvDst = (uint16_t)u32Value; pvDst = (uint8_t *)pvDst + 2; break;
292	case 1: (uint8_t )pvDst = (uint8_t )u32Value; pvDst = (uint8_t *)pvDst + 1; break;
293	default: AssertFailed();
294	}
295	*pcTransfers -= 1;
296	}
297	} while ( *pcTransfers > 0
298	&& rcStrict == VINF_SUCCESS);
299	}
300	PDMCritSectLeave(pVM, pDevIns->CTX_SUFF(pCritSectRo));
301
302	#ifdef VBOX_WITH_STATISTICS
303	# ifndef IN_RING3
304	if (rcStrict == VINF_IOM_R3_IOPORT_READ)
305	STAM_COUNTER_INC(&pStats->InRZToR3);
306	else
307	# endif
308	{
309	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(In));
310	STAM_COUNTER_INC(&iomIoPortGetStats(pVM, pRegEntry, 0)->Total);
311	}
312	#endif
313	Log3(("IOMIOPortReadStr: uPort=%RTiop pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=%Rrc\n",
314	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
315	}
316	#ifndef IN_RING3
317	else
318	STAM_COUNTER_INC(&pStats->InRZToR3);
319	#endif
320	return rcStrict;
321	}
322
323	/*
324	* Ok, no handler for this port.
325	*/
326	IOM_UNLOCK_SHARED(pVM);
327	*pcTransfers = 0;
328	memset(pvDst, 0xff, cRequestedTransfers * cb);
329	Log3(("IOMIOPortReadStr: uPort=%RTiop (unused) pvDst=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
330	uPort, pvDst, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
331	return VINF_SUCCESS;
332	}
333
334
335	#ifndef IN_RING3
336	/**
337	* Defers a pending I/O port write to ring-3.
338	*
339	* @returns VINF_IOM_R3_IOPORT_COMMIT_WRITE
340	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
341	* @param Port The port to write to.
342	* @param u32Value The value to write.
343	* @param cbValue The size of the value (1, 2, 4).
344	*/
345	static VBOXSTRICTRC iomIOPortRing3WritePending(PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
346	{
347	Log5(("iomIOPortRing3WritePending: %#x LB %u -> %RTiop\n", u32Value, cbValue, Port));
348	AssertReturn(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0, VERR_IOM_IOPORT_IPE_1);
349	pVCpu->iom.s.PendingIOPortWrite.IOPort = Port;
350	pVCpu->iom.s.PendingIOPortWrite.u32Value = u32Value;
351	pVCpu->iom.s.PendingIOPortWrite.cbValue = (uint32_t)cbValue;
352	VMCPU_FF_SET(pVCpu, VMCPU_FF_IOM);
353	return VINF_IOM_R3_IOPORT_COMMIT_WRITE;
354	}
355	#endif
356
357
358	/**
359	* Writes to an I/O port register.
360	*
361	* @returns Strict VBox status code. Informational status codes other than the one documented
362	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
363	* @retval VINF_SUCCESS Success.
364	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
365	* status code must be passed on to EM.
366	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
367	*
368	* @param pVM The cross context VM structure.
369	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
370	* @param Port The port to write to.
371	* @param u32Value The value to write.
372	* @param cbValue The size of the register to read in bytes. 1, 2 or 4 bytes.
373	*/
374	VMMDECL(VBOXSTRICTRC) IOMIOPortWrite(PVMCC pVM, PVMCPU pVCpu, RTIOPORT Port, uint32_t u32Value, size_t cbValue)
375	{
376	STAM_COUNTER_INC(&pVM->iom.s.StatIoPortOut);
377	#ifndef IN_RING3
378	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
379	#endif
380
381	/* For lookups we need to share lock IOM. */
382	int rc2 = IOM_LOCK_SHARED(pVM);
383	if (RT_SUCCESS(rc2))
384	{ /* likely */ }
385	#ifndef IN_RING3
386	else if (rc2 == VERR_SEM_BUSY)
387	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
388	#endif
389	else
390	AssertMsgFailedReturn(("rc2=%Rrc\n", rc2), rc2);
391
392	/*
393	* Get the entry for the current context.
394	*/
395	uint16_t offPort;
396	CTX_SUFF(PIOMIOPORTENTRY) pRegEntry = iomIoPortGetEntry(pVM, Port, &offPort, &pVCpu->iom.s.idxIoPortLastWrite);
397	if (pRegEntry)
398	{
399	#ifdef VBOX_WITH_STATISTICS
400	PIOMIOPORTSTATSENTRY pStats = iomIoPortGetStats(pVM, pRegEntry, offPort);
401	#endif
402
403	/*
404	* Found an entry, get the data so we can leave the IOM lock.
405	*/
406	uint16_t const fFlags = pRegEntry->fFlags;
407	PFNIOMIOPORTNEWOUT pfnOutCallback = pRegEntry->pfnOutCallback;
408	PPDMDEVINS pDevIns = pRegEntry->pDevIns;
409	#ifndef IN_RING3
410	if ( pfnOutCallback
411	&& pDevIns
412	&& pRegEntry->cPorts > 0)
413	{ /* likely */ }
414	else
415	{
416	IOM_UNLOCK_SHARED(pVM);
417	STAM_COUNTER_INC(&pStats->OutRZToR3);
418	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
419	}
420	#endif
421	void *pvUser = pRegEntry->pvUser;
422	IOM_UNLOCK_SHARED(pVM);
423	AssertPtr(pDevIns);
424	AssertPtr(pfnOutCallback);
425
426	/*
427	* Call the device.
428	*/
429	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pVM, pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
430	if (rcStrict == VINF_SUCCESS)
431	{
432	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
433	rcStrict = pfnOutCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? Port : offPort, u32Value, (unsigned)cbValue);
434	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
435
436	PDMCritSectLeave(pVM, pDevIns->CTX_SUFF(pCritSectRo));
437
438	#ifdef VBOX_WITH_STATISTICS
439	# ifndef IN_RING3
440	if (rcStrict != VINF_IOM_R3_IOPORT_WRITE)
441	# endif
442	{
443	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
444	STAM_COUNTER_INC(&iomIoPortGetStats(pVM, pRegEntry, 0)->Total);
445	}
446	#endif
447	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d rc=%Rrc\n", Port, u32Value, cbValue, VBOXSTRICTRC_VAL(rcStrict)));
448	}
449	#ifndef IN_RING3
450	if (rcStrict == VINF_IOM_R3_IOPORT_WRITE)
451	{
452	STAM_COUNTER_INC(&pStats->OutRZToR3);
453	return iomIOPortRing3WritePending(pVCpu, Port, u32Value, cbValue);
454	}
455	#endif
456	return rcStrict;
457	}
458
459	/*
460	* Ok, no handler for that port.
461	*/
462	IOM_UNLOCK_SHARED(pVM);
463	Log3(("IOMIOPortWrite: Port=%RTiop u32=%08RX32 cb=%d nop\n", Port, u32Value, cbValue));
464	return VINF_SUCCESS;
465	}
466
467
468	/**
469	* Writes the string buffer of an I/O port register.
470	*
471	* @returns Strict VBox status code. Informational status codes other than the one documented
472	* here are to be treated as internal failure. Use IOM_SUCCESS() to check for success.
473	* @retval VINF_SUCCESS Success or no string I/O callback in
474	* this context.
475	* @retval VINF_EM_FIRST-VINF_EM_LAST Success with some exceptions (see IOM_SUCCESS()), the
476	* status code must be passed on to EM.
477	* @retval VINF_IOM_R3_IOPORT_WRITE Defer the write to ring-3. (R0/RC only)
478	*
479	* @param pVM The cross context VM structure.
480	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
481	* @param uPort The port to write to.
482	* @param pvSrc The guest page to read from.
483	* @param pcTransfers Pointer to the number of transfer units to write, on
484	* return remaining transfer units.
485	* @param cb Size of the transfer unit (1, 2 or 4 bytes).
486	*/
487	VMM_INT_DECL(VBOXSTRICTRC) IOMIOPortWriteString(PVMCC pVM, PVMCPU pVCpu, RTIOPORT uPort, void const *pvSrc,
488	uint32_t *pcTransfers, unsigned cb)
489	{
490	STAM_COUNTER_INC(&pVM->iom.s.StatIoPortOutS);
491	Assert(pVCpu->iom.s.PendingIOPortWrite.cbValue == 0);
492	Assert(cb == 1 \|\| cb == 2 \|\| cb == 4);
493
494	/* Take the IOM lock before performing any device I/O. */
495	int rc2 = IOM_LOCK_SHARED(pVM);
496	if (RT_SUCCESS(rc2))
497	{ /* likely */ }
498	#ifndef IN_RING3
499	else if (rc2 == VERR_SEM_BUSY)
500	return VINF_IOM_R3_IOPORT_WRITE;
501	#endif
502	else
503	AssertMsgFailedReturn(("rc2=%Rrc\n", rc2), rc2);
504
505	const uint32_t cRequestedTransfers = *pcTransfers;
506	Assert(cRequestedTransfers > 0);
507
508	/*
509	* Get the entry for the current context.
510	*/
511	uint16_t offPort;
512	CTX_SUFF(PIOMIOPORTENTRY) pRegEntry = iomIoPortGetEntry(pVM, uPort, &offPort, &pVCpu->iom.s.idxIoPortLastWriteStr);
513	if (pRegEntry)
514	{
515	#ifdef VBOX_WITH_STATISTICS
516	PIOMIOPORTSTATSENTRY pStats = iomIoPortGetStats(pVM, pRegEntry, offPort);
517	#endif
518
519	/*
520	* Found an entry, get the data so we can leave the IOM lock.
521	*/
522	uint16_t const fFlags = pRegEntry->fFlags;
523	PFNIOMIOPORTNEWOUTSTRING pfnOutStrCallback = pRegEntry->pfnOutStrCallback;
524	PFNIOMIOPORTNEWOUT pfnOutCallback = pRegEntry->pfnOutCallback;
525	PPDMDEVINS pDevIns = pRegEntry->pDevIns;
526	#ifndef IN_RING3
527	if ( pfnOutCallback
528	&& pDevIns
529	&& pRegEntry->cPorts > 0)
530	{ /* likely */ }
531	else
532	{
533	IOM_UNLOCK_SHARED(pVM);
534	STAM_COUNTER_INC(&pStats->OutRZToR3);
535	return VINF_IOM_R3_IOPORT_WRITE;
536	}
537	#endif
538	void *pvUser = pRegEntry->pvUser;
539	IOM_UNLOCK_SHARED(pVM);
540	AssertPtr(pDevIns);
541	AssertPtr(pfnOutCallback);
542
543	/*
544	* Call the device.
545	*/
546	VBOXSTRICTRC rcStrict = PDMCritSectEnter(pVM, pDevIns->CTX_SUFF(pCritSectRo), VINF_IOM_R3_IOPORT_WRITE);
547	if (rcStrict == VINF_SUCCESS)
548	{
549	/*
550	* First using string I/O if possible.
551	*/
552	if (pfnOutStrCallback)
553	{
554	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
555	rcStrict = pfnOutStrCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? uPort : offPort,
556	(uint8_t const *)pvSrc, pcTransfers, cb);
557	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
558	}
559
560	/*
561	* Then doing the single I/O fallback.
562	*/
563	if ( *pcTransfers > 0
564	&& rcStrict == VINF_SUCCESS)
565	{
566	pvSrc = (uint8_t )pvSrc + (cRequestedTransfers - pcTransfers) * cb;
567	do
568	{
569	uint32_t u32Value;
570	switch (cb)
571	{
572	case 4: u32Value = (uint32_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 4; break;
573	case 2: u32Value = (uint16_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 2; break;
574	case 1: u32Value = (uint8_t )pvSrc; pvSrc = (uint8_t const *)pvSrc + 1; break;
575	default: AssertFailed(); u32Value = UINT32_MAX;
576	}
577	STAM_PROFILE_START(&pStats->CTX_SUFF_Z(ProfOut), a);
578	rcStrict = pfnOutCallback(pDevIns, pvUser, fFlags & IOM_IOPORT_F_ABS ? uPort : offPort, u32Value, cb);
579	STAM_PROFILE_STOP(&pStats->CTX_SUFF_Z(ProfOut), a);
580	if (IOM_SUCCESS(rcStrict))
581	*pcTransfers -= 1;
582	} while ( *pcTransfers > 0
583	&& rcStrict == VINF_SUCCESS);
584	}
585
586	PDMCritSectLeave(pVM, pDevIns->CTX_SUFF(pCritSectRo));
587
588	#ifdef VBOX_WITH_STATISTICS
589	# ifndef IN_RING3
590	if (rcStrict == VINF_IOM_R3_IOPORT_WRITE)
591	STAM_COUNTER_INC(&pStats->OutRZToR3);
592	else
593	# endif
594	{
595	STAM_COUNTER_INC(&pStats->CTX_SUFF_Z(Out));
596	STAM_COUNTER_INC(&iomIoPortGetStats(pVM, pRegEntry, 0)->Total);
597	}
598	#endif
599	Log3(("IOMIOPortWriteStr: uPort=%RTiop pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rcStrict=%Rrc\n",
600	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb, VBOXSTRICTRC_VAL(rcStrict)));
601	}
602	#ifndef IN_RING3
603	else
604	STAM_COUNTER_INC(&pStats->OutRZToR3);
605	#endif
606	return rcStrict;
607	}
608
609	/*
610	* Ok, no handler for this port.
611	*/
612	IOM_UNLOCK_SHARED(pVM);
613	*pcTransfers = 0;
614	Log3(("IOMIOPortWriteStr: uPort=%RTiop (unused) pvSrc=%p pcTransfer=%p:{%#x->%#x} cb=%d rc=VINF_SUCCESS\n",
615	uPort, pvSrc, pcTransfers, cRequestedTransfers, *pcTransfers, cb));
616	return VINF_SUCCESS;
617	}
618

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source: vbox/trunk/src/VBox/VMM/VMMAll/IOMAll.cpp@ 104255

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