IOMR3Mmio.cpp@ 106952

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1	/* $Id: IOMR3Mmio.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* IOM - Input / Output Monitor, MMIO related APIs.
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 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_MMIO
33	#include <VBox/vmm/iom.h>
34	#include <VBox/sup.h>
35	#include <VBox/vmm/mm.h>
36	#include <VBox/vmm/stam.h>
37	#include <VBox/vmm/dbgf.h>
38	#include <VBox/vmm/pdmapi.h>
39	#include <VBox/vmm/pdmdev.h>
40	#include "IOMInternal.h"
41	#include <VBox/vmm/vm.h>
42
43	#include <VBox/param.h>
44	#include <iprt/assert.h>
45	#include <iprt/mem.h>
46	#include <iprt/string.h>
47	#include <VBox/log.h>
48	#include <VBox/err.h>
49
50	#include "IOMInline.h"
51
52
53	#ifdef VBOX_WITH_STATISTICS
54
55	/**
56	* Register statistics for a MMIO entry.
57	*/
58	void iomR3MmioRegStats(PVM pVM, PIOMMMIOENTRYR3 pRegEntry)
59	{
60	bool const fDoRZ = pRegEntry->fRing0 \|\| pRegEntry->fRawMode;
61	PIOMMMIOSTATSENTRY pStats = &pVM->iom.s.paMmioStats[pRegEntry->idxStats];
62
63	/* Format the prefix: */
64	char szName[80];
65	size_t cchPrefix = RTStrPrintf(szName, sizeof(szName), "/IOM/MmioRegions/%RGp-%RGp",
66	pRegEntry->GCPhysMapping, pRegEntry->GCPhysMapping + pRegEntry->cbRegion - 1);
67
68	/* Mangle the description if this isn't the first device instance: */
69	const char *pszDesc = pRegEntry->pszDesc;
70	char *pszFreeDesc = NULL;
71	if (pRegEntry->pDevIns && pRegEntry->pDevIns->iInstance > 0 && pszDesc)
72	pszDesc = pszFreeDesc = RTStrAPrintf2("%u / %s", pRegEntry->pDevIns->iInstance, pszDesc);
73
74	/* Register statistics: */
75	int rc = STAMR3Register(pVM, &pRegEntry->idxSelf, STAMTYPE_U16, STAMVISIBILITY_ALWAYS, szName, STAMUNIT_NONE, pszDesc); AssertRC(rc);
76	RTStrFree(pszFreeDesc);
77
78	# define SET_NM_SUFFIX(a_sz) memcpy(&szName[cchPrefix], a_sz, sizeof(a_sz))
79	SET_NM_SUFFIX("/Read-Complicated");
80	rc = STAMR3Register(pVM, &pStats->ComplicatedReads, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
81	SET_NM_SUFFIX("/Read-FFor00");
82	rc = STAMR3Register(pVM, &pStats->FFor00Reads, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
83	SET_NM_SUFFIX("/Read-R3");
84	rc = STAMR3Register(pVM, &pStats->ProfReadR3, STAMTYPE_PROFILE, STAMVISIBILITY_USED, szName, STAMUNIT_TICKS_PER_CALL, NULL); AssertRC(rc);
85	if (fDoRZ)
86	{
87	SET_NM_SUFFIX("/Read-RZ");
88	rc = STAMR3Register(pVM, &pStats->ProfReadRZ, STAMTYPE_PROFILE, STAMVISIBILITY_USED, szName, STAMUNIT_TICKS_PER_CALL, NULL); AssertRC(rc);
89	SET_NM_SUFFIX("/Read-RZtoR3");
90	rc = STAMR3Register(pVM, &pStats->ReadRZToR3, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
91	}
92	SET_NM_SUFFIX("/Read-Total");
93	rc = STAMR3Register(pVM, &pStats->Reads, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
94
95	SET_NM_SUFFIX("/Write-Complicated");
96	rc = STAMR3Register(pVM, &pStats->ComplicatedWrites, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
97	SET_NM_SUFFIX("/Write-R3");
98	rc = STAMR3Register(pVM, &pStats->ProfWriteR3, STAMTYPE_PROFILE, STAMVISIBILITY_USED, szName, STAMUNIT_TICKS_PER_CALL, NULL); AssertRC(rc);
99	if (fDoRZ)
100	{
101	SET_NM_SUFFIX("/Write-RZ");
102	rc = STAMR3Register(pVM, &pStats->ProfWriteRZ, STAMTYPE_PROFILE, STAMVISIBILITY_USED, szName, STAMUNIT_TICKS_PER_CALL, NULL); AssertRC(rc);
103	SET_NM_SUFFIX("/Write-RZtoR3");
104	rc = STAMR3Register(pVM, &pStats->WriteRZToR3, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
105	SET_NM_SUFFIX("/Write-RZtoR3-Commit");
106	rc = STAMR3Register(pVM, &pStats->CommitRZToR3, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
107	}
108	SET_NM_SUFFIX("/Write-Total");
109	rc = STAMR3Register(pVM, &pStats->Writes, STAMTYPE_COUNTER, STAMVISIBILITY_USED, szName, STAMUNIT_OCCURENCES, NULL); AssertRC(rc);
110	}
111
112
113	/**
114	* Deregister statistics for a MMIO entry.
115	*/
116	static void iomR3MmioDeregStats(PVM pVM, PIOMMMIOENTRYR3 pRegEntry, RTGCPHYS GCPhys)
117	{
118	char szPrefix[80];
119	RTStrPrintf(szPrefix, sizeof(szPrefix), "/IOM/MmioRegions/%RGp-%RGp", GCPhys, GCPhys + pRegEntry->cbRegion - 1);
120	STAMR3DeregisterByPrefix(pVM->pUVM, szPrefix);
121	}
122
123
124	/**
125	* Grows the statistics table.
126	*
127	* @returns VBox status code.
128	* @param pVM The cross context VM structure.
129	* @param cNewEntries The minimum number of new entrie.
130	* @see IOMR0IoPortGrowStatisticsTable
131	*/
132	static int iomR3MmioGrowStatisticsTable(PVM pVM, uint32_t cNewEntries)
133	{
134	AssertReturn(cNewEntries <= _64K, VERR_IOM_TOO_MANY_MMIO_REGISTRATIONS);
135
136	int rc;
137	if (!SUPR3IsDriverless())
138	{
139	rc = VMMR3CallR0Emt(pVM, pVM->apCpusR3[0], VMMR0_DO_IOM_GROW_MMIO_STATS, cNewEntries, NULL);
140	AssertLogRelRCReturn(rc, rc);
141	AssertReturn(cNewEntries <= pVM->iom.s.cMmioStatsAllocation, VERR_IOM_MMIO_IPE_2);
142	}
143	else
144	{
145	/*
146	* Validate input and state.
147	*/
148	uint32_t const cOldEntries = pVM->iom.s.cMmioStatsAllocation;
149	AssertReturn(cNewEntries > cOldEntries, VERR_IOM_MMIO_IPE_1);
150	AssertReturn(pVM->iom.s.cMmioStats <= cOldEntries, VERR_IOM_MMIO_IPE_2);
151
152	/*
153	* Calc size and allocate a new table.
154	*/
155	uint32_t const cbNew = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOSTATSENTRY), HOST_PAGE_SIZE);
156	cNewEntries = cbNew / sizeof(IOMMMIOSTATSENTRY);
157
158	PIOMMMIOSTATSENTRY const paMmioStats = (PIOMMMIOSTATSENTRY)RTMemPageAllocZ(cbNew);
159	if (paMmioStats)
160	{
161	/*
162	* Anything to copy over, update and free the old one.
163	*/
164	PIOMMMIOSTATSENTRY const pOldMmioStats = pVM->iom.s.paMmioStats;
165	if (pOldMmioStats)
166	memcpy(paMmioStats, pOldMmioStats, cOldEntries * sizeof(IOMMMIOSTATSENTRY));
167
168	pVM->iom.s.paMmioStats = paMmioStats;
169	pVM->iom.s.cMmioStatsAllocation = cNewEntries;
170
171	RTMemPageFree(pOldMmioStats, RT_ALIGN_32(cOldEntries * sizeof(IOMMMIOSTATSENTRY), HOST_PAGE_SIZE));
172
173	rc = VINF_SUCCESS;
174	}
175	else
176	rc = VERR_NO_PAGE_MEMORY;
177	}
178
179	return rc;
180	}
181
182	#endif /* VBOX_WITH_STATISTICS */
183
184	/**
185	* Grows the I/O port registration statistics table.
186	*
187	* @returns VBox status code.
188	* @param pVM The cross context VM structure.
189	* @param cNewEntries The minimum number of new entrie.
190	* @see IOMR0MmioGrowRegistrationTables
191	*/
192	static int iomR3MmioGrowTable(PVM pVM, uint32_t cNewEntries)
193	{
194	AssertReturn(cNewEntries <= _4K, VERR_IOM_TOO_MANY_MMIO_REGISTRATIONS);
195
196	int rc;
197	if (!SUPR3IsDriverless())
198	{
199	rc = VMMR3CallR0Emt(pVM, pVM->apCpusR3[0], VMMR0_DO_IOM_GROW_MMIO_REGS, cNewEntries, NULL);
200	AssertLogRelRCReturn(rc, rc);
201	AssertReturn(cNewEntries <= pVM->iom.s.cMmioAlloc, VERR_IOM_MMIO_IPE_2);
202	}
203	else
204	{
205	/*
206	* Validate input and state.
207	*/
208	uint32_t const cOldEntries = pVM->iom.s.cMmioAlloc;
209	AssertReturn(cNewEntries >= cOldEntries, VERR_IOM_MMIO_IPE_1);
210
211	/*
212	* Allocate the new tables. We use a single allocation for the three tables (ring-0,
213	* ring-3, lookup) and does a partial mapping of the result to ring-3.
214	*/
215	uint32_t const cbRing3 = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOENTRYR3), HOST_PAGE_SIZE);
216	uint32_t const cbShared = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOLOOKUPENTRY), HOST_PAGE_SIZE);
217	uint32_t const cbNew = cbRing3 + cbShared;
218
219	/* Use the rounded up space as best we can. */
220	cNewEntries = RT_MIN(cbRing3 / sizeof(IOMMMIOENTRYR3), cbShared / sizeof(IOMMMIOLOOKUPENTRY));
221
222	PIOMMMIOENTRYR3 const paRing3 = (PIOMMMIOENTRYR3)RTMemPageAllocZ(cbNew);
223	if (paRing3)
224	{
225	PIOMMMIOLOOKUPENTRY const paLookup = (PIOMMMIOLOOKUPENTRY)((uintptr_t)paRing3 + cbRing3);
226
227	/*
228	* Copy over the old info and initialize the idxSelf and idxStats members.
229	*/
230	if (pVM->iom.s.paMmioRegs != NULL)
231	{
232	memcpy(paRing3, pVM->iom.s.paMmioRegs, sizeof(paRing3[0]) * cOldEntries);
233	memcpy(paLookup, pVM->iom.s.paMmioLookup, sizeof(paLookup[0]) * cOldEntries);
234	}
235
236	size_t i = cbRing3 / sizeof(*paRing3);
237	while (i-- > cOldEntries)
238	{
239	paRing3[i].idxSelf = (uint16_t)i;
240	paRing3[i].idxStats = UINT16_MAX;
241	}
242
243	/*
244	* Update the variables and free the old memory.
245	*/
246	void * const pvFree = pVM->iom.s.paMmioRegs;
247
248	pVM->iom.s.paMmioRegs = paRing3;
249	pVM->iom.s.paMmioLookup = paLookup;
250	pVM->iom.s.cMmioAlloc = cNewEntries;
251
252	RTMemPageFree(pvFree,
253	RT_ALIGN_32(cOldEntries * sizeof(IOMMMIOENTRYR3), HOST_PAGE_SIZE)
254	+ RT_ALIGN_32(cOldEntries * sizeof(IOMMMIOLOOKUPENTRY), HOST_PAGE_SIZE));
255
256	rc = VINF_SUCCESS;
257	}
258	else
259	rc = VERR_NO_PAGE_MEMORY;
260	}
261	return rc;
262	}
263
264
265	/**
266	* Worker for PDMDEVHLPR3::pfnMmioCreateEx.
267	*/
268	VMMR3_INT_DECL(int) IOMR3MmioCreate(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS cbRegion, uint32_t fFlags, PPDMPCIDEV pPciDev,
269	uint32_t iPciRegion, PFNIOMMMIONEWWRITE pfnWrite, PFNIOMMMIONEWREAD pfnRead,
270	PFNIOMMMIONEWFILL pfnFill, void pvUser, const char pszDesc, PIOMMMIOHANDLE phRegion)
271	{
272	/*
273	* Validate input.
274	*/
275	AssertPtrReturn(phRegion, VERR_INVALID_POINTER);
276	*phRegion = UINT32_MAX;
277	PVMCPU const pVCpu = VMMGetCpu(pVM);
278	AssertReturn(pVCpu && pVCpu->idCpu == 0, VERR_VM_THREAD_NOT_EMT);
279	VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
280	AssertReturn(!pVM->iom.s.fMmioFrozen, VERR_WRONG_ORDER);
281
282	AssertPtrReturn(pDevIns, VERR_INVALID_POINTER);
283
284	AssertMsgReturn(cbRegion > 0 && cbRegion <= MM_MMIO_64_MAX, ("cbRegion=%#RGp (max %#RGp)\n", cbRegion, MM_MMIO_64_MAX),
285	VERR_OUT_OF_RANGE);
286	AssertMsgReturn(!(cbRegion & GUEST_PAGE_OFFSET_MASK), ("cbRegion=%#RGp\n", cbRegion), VERR_UNSUPPORTED_ALIGNMENT);
287
288	AssertMsgReturn( !(fFlags & ~IOMMMIO_FLAGS_VALID_MASK)
289	&& (fFlags & IOMMMIO_FLAGS_READ_MODE) <= IOMMMIO_FLAGS_READ_DWORD_QWORD
290	&& (fFlags & IOMMMIO_FLAGS_WRITE_MODE) <= IOMMMIO_FLAGS_WRITE_ONLY_DWORD_QWORD,
291	("%#x\n", fFlags),
292	VERR_INVALID_FLAGS);
293
294	AssertReturn(pfnWrite \|\| pfnRead, VERR_INVALID_PARAMETER);
295	AssertPtrNullReturn(pfnWrite, VERR_INVALID_POINTER);
296	AssertPtrNullReturn(pfnRead, VERR_INVALID_POINTER);
297	AssertPtrNullReturn(pfnFill, VERR_INVALID_POINTER);
298
299	AssertPtrReturn(pszDesc, VERR_INVALID_POINTER);
300	AssertReturn(*pszDesc != '\0', VERR_INVALID_POINTER);
301	AssertReturn(strlen(pszDesc) < 128, VERR_INVALID_POINTER);
302
303	/*
304	* Ensure that we've got table space for it.
305	*/
306	#ifndef VBOX_WITH_STATISTICS
307	uint16_t const idxStats = UINT16_MAX;
308	#else
309	uint32_t const idxStats = pVM->iom.s.cMmioStats;
310	uint32_t const cNewMmioStats = idxStats + 1;
311	AssertReturn(cNewMmioStats <= _64K, VERR_IOM_TOO_MANY_MMIO_REGISTRATIONS);
312	if (cNewMmioStats > pVM->iom.s.cMmioStatsAllocation)
313	{
314	int rc = iomR3MmioGrowStatisticsTable(pVM, cNewMmioStats);
315	AssertRCReturn(rc, rc);
316	AssertReturn(idxStats == pVM->iom.s.cMmioStats, VERR_IOM_MMIO_IPE_1);
317	}
318	#endif
319
320	uint32_t idx = pVM->iom.s.cMmioRegs;
321	if (idx >= pVM->iom.s.cMmioAlloc)
322	{
323	int rc = iomR3MmioGrowTable(pVM, pVM->iom.s.cMmioAlloc + 1);
324	AssertRCReturn(rc, rc);
325	AssertReturn(idx == pVM->iom.s.cMmioRegs, VERR_IOM_MMIO_IPE_1);
326	}
327
328	/*
329	* Create a matching ad-hoc RAM range for this MMIO region.
330	*/
331	uint16_t idRamRange = 0;
332	int rc = PGMR3PhysMmioRegister(pVM, pVCpu, cbRegion, pszDesc, &idRamRange);
333	AssertRCReturn(rc, rc);
334
335	/*
336	* Enter it.
337	*/
338	pVM->iom.s.paMmioRegs[idx].cbRegion = cbRegion;
339	pVM->iom.s.paMmioRegs[idx].GCPhysMapping = NIL_RTGCPHYS;
340	pVM->iom.s.paMmioRegs[idx].pvUser = pvUser;
341	pVM->iom.s.paMmioRegs[idx].pDevIns = pDevIns;
342	pVM->iom.s.paMmioRegs[idx].pfnWriteCallback = pfnWrite;
343	pVM->iom.s.paMmioRegs[idx].pfnReadCallback = pfnRead;
344	pVM->iom.s.paMmioRegs[idx].pfnFillCallback = pfnFill;
345	pVM->iom.s.paMmioRegs[idx].pszDesc = pszDesc;
346	pVM->iom.s.paMmioRegs[idx].pPciDev = pPciDev;
347	pVM->iom.s.paMmioRegs[idx].iPciRegion = iPciRegion;
348	pVM->iom.s.paMmioRegs[idx].idxStats = (uint16_t)idxStats;
349	pVM->iom.s.paMmioRegs[idx].fMapped = false;
350	pVM->iom.s.paMmioRegs[idx].fFlags = fFlags;
351	pVM->iom.s.paMmioRegs[idx].idRamRange = idRamRange;
352	pVM->iom.s.paMmioRegs[idx].idxSelf = idx;
353
354	pVM->iom.s.cMmioRegs = idx + 1;
355	#ifdef VBOX_WITH_STATISTICS
356	pVM->iom.s.cMmioStats = cNewMmioStats;
357	#endif
358	*phRegion = idx;
359	return VINF_SUCCESS;
360	}
361
362
363	/**
364	* Worker for PDMDEVHLPR3::pfnMmioMap.
365	*/
366	VMMR3_INT_DECL(int) IOMR3MmioMap(PVM pVM, PVMCPU pVCpu, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion, RTGCPHYS GCPhys)
367	{
368	/*
369	* Validate input and state.
370	*/
371	VMCPU_ASSERT_EMT_RETURN(pVCpu, VERR_VM_THREAD_NOT_EMT);
372	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
373	AssertReturn(hRegion < pVM->iom.s.cMmioRegs, VERR_IOM_INVALID_MMIO_HANDLE);
374	PIOMMMIOENTRYR3 const pRegEntry = &pVM->iom.s.paMmioRegs[hRegion];
375	AssertReturn(pRegEntry->pDevIns == pDevIns, VERR_IOM_INVALID_MMIO_HANDLE);
376
377	RTGCPHYS const cbRegion = pRegEntry->cbRegion;
378	AssertMsgReturn(cbRegion > 0 && cbRegion <= MM_MMIO_64_MAX, ("cbRegion=%RGp\n", cbRegion), VERR_IOM_MMIO_IPE_1);
379	RTGCPHYS const GCPhysLast = GCPhys + cbRegion - 1;
380
381	AssertLogRelMsgReturn(!(GCPhys & GUEST_PAGE_OFFSET_MASK),
382	("Misaligned! GCPhys=%RGp LB %RGp %s (%s[#%u])\n",
383	GCPhys, cbRegion, pRegEntry->pszDesc, pDevIns->pReg->szName, pDevIns->iInstance),
384	VERR_IOM_INVALID_MMIO_RANGE);
385	AssertLogRelMsgReturn(GCPhysLast > GCPhys,
386	("Wrapped! GCPhys=%RGp LB %RGp %s (%s[#%u])\n",
387	GCPhys, cbRegion, pRegEntry->pszDesc, pDevIns->pReg->szName, pDevIns->iInstance),
388	VERR_IOM_INVALID_MMIO_RANGE);
389
390	/*
391	* Do the mapping.
392	*/
393	int rc = VINF_SUCCESS;
394	IOM_LOCK_EXCL(pVM);
395
396	if (!pRegEntry->fMapped)
397	{
398	uint32_t const cEntries = RT_MIN(pVM->iom.s.cMmioLookupEntries, pVM->iom.s.cMmioRegs);
399	Assert(pVM->iom.s.cMmioLookupEntries == cEntries);
400
401	PIOMMMIOLOOKUPENTRY paEntries = pVM->iom.s.paMmioLookup;
402	PIOMMMIOLOOKUPENTRY pEntry;
403	if (cEntries > 0)
404	{
405	uint32_t iFirst = 0;
406	uint32_t iEnd = cEntries;
407	uint32_t i = cEntries / 2;
408	for (;;)
409	{
410	pEntry = &paEntries[i];
411	if (pEntry->GCPhysLast < GCPhys)
412	{
413	i += 1;
414	if (i < iEnd)
415	iFirst = i;
416	else
417	{
418	/* Register with PGM before we shuffle the array: */
419	ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, GCPhys);
420	rc = PGMR3PhysMmioMap(pVM, pVCpu, GCPhys, cbRegion, pRegEntry->idRamRange,
421	pVM->iom.s.hNewMmioHandlerType, hRegion);
422	AssertRCReturnStmt(rc, ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, NIL_RTGCPHYS); IOM_UNLOCK_EXCL(pVM), rc);
423
424	/* Insert after the entry we just considered: */
425	pEntry += 1;
426	if (i < cEntries)
427	memmove(pEntry + 1, pEntry, sizeof(pEntry) (cEntries - i));
428	break;
429	}
430	}
431	else if (pEntry->GCPhysFirst > GCPhysLast)
432	{
433	if (i > iFirst)
434	iEnd = i;
435	else
436	{
437	/* Register with PGM before we shuffle the array: */
438	ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, GCPhys);
439	rc = PGMR3PhysMmioMap(pVM, pVCpu, GCPhys, cbRegion, pRegEntry->idRamRange,
440	pVM->iom.s.hNewMmioHandlerType, hRegion);
441	AssertRCReturnStmt(rc, ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, NIL_RTGCPHYS); IOM_UNLOCK_EXCL(pVM), rc);
442
443	/* Insert at the entry we just considered: */
444	if (i < cEntries)
445	memmove(pEntry + 1, pEntry, sizeof(pEntry) (cEntries - i));
446	break;
447	}
448	}
449	else
450	{
451	/* Oops! We've got a conflict. */
452	AssertLogRelMsgFailed(("%RGp..%RGp (%s) conflicts with existing mapping %RGp..%RGp (%s)\n",
453	GCPhys, GCPhysLast, pRegEntry->pszDesc,
454	pEntry->GCPhysFirst, pEntry->GCPhysLast, pVM->iom.s.paMmioRegs[pEntry->idx].pszDesc));
455	IOM_UNLOCK_EXCL(pVM);
456	return VERR_IOM_MMIO_RANGE_CONFLICT;
457	}
458
459	i = iFirst + (iEnd - iFirst) / 2;
460	}
461	}
462	else
463	{
464	/* First entry in the lookup table: */
465	ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, GCPhys);
466	rc = PGMR3PhysMmioMap(pVM, pVCpu, GCPhys, cbRegion, pRegEntry->idRamRange,
467	pVM->iom.s.hNewMmioHandlerType, hRegion);
468	AssertRCReturnStmt(rc, ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, NIL_RTGCPHYS); IOM_UNLOCK_EXCL(pVM), rc);
469
470	pEntry = paEntries;
471	}
472
473	/*
474	* Fill in the entry and bump the table size.
475	*/
476	pRegEntry->fMapped = true;
477	pEntry->idx = hRegion;
478	pEntry->GCPhysFirst = GCPhys;
479	pEntry->GCPhysLast = GCPhysLast;
480	pVM->iom.s.cMmioLookupEntries = cEntries + 1;
481
482	#ifdef VBOX_WITH_STATISTICS
483	/* Don't register stats here when we're creating the VM as the
484	statistics table may still be reallocated. */
485	if (pVM->enmVMState >= VMSTATE_CREATED)
486	iomR3MmioRegStats(pVM, pRegEntry);
487	#endif
488
489	#ifdef VBOX_STRICT
490	/*
491	* Assert table sanity.
492	*/
493	AssertMsg(paEntries[0].GCPhysLast >= paEntries[0].GCPhysFirst, ("%RGp %RGp\n", paEntries[0].GCPhysLast, paEntries[0].GCPhysFirst));
494	AssertMsg(paEntries[0].idx < pVM->iom.s.cMmioRegs, ("%#x %#x\n", paEntries[0].idx, pVM->iom.s.cMmioRegs));
495
496	RTGCPHYS GCPhysPrev = paEntries[0].GCPhysLast;
497	for (size_t i = 1; i <= cEntries; i++)
498	{
499	AssertMsg(paEntries[i].GCPhysLast >= paEntries[i].GCPhysFirst, ("%u: %RGp %RGp\n", i, paEntries[i].GCPhysLast, paEntries[i].GCPhysFirst));
500	AssertMsg(paEntries[i].idx < pVM->iom.s.cMmioRegs, ("%u: %#x %#x\n", i, paEntries[i].idx, pVM->iom.s.cMmioRegs));
501	AssertMsg(GCPhysPrev < paEntries[i].GCPhysFirst, ("%u: %RGp %RGp\n", i, GCPhysPrev, paEntries[i].GCPhysFirst));
502	GCPhysPrev = paEntries[i].GCPhysLast;
503	}
504	#endif
505	}
506	else
507	{
508	AssertFailed();
509	rc = VERR_IOM_MMIO_REGION_ALREADY_MAPPED;
510	}
511
512	IOM_UNLOCK_EXCL(pVM);
513	return rc;
514	}
515
516
517	/**
518	* Worker for PDMDEVHLPR3::pfnMmioUnmap.
519	*/
520	VMMR3_INT_DECL(int) IOMR3MmioUnmap(PVM pVM, PVMCPU pVCpu, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion)
521	{
522	/*
523	* Validate input and state.
524	*/
525	VMCPU_ASSERT_EMT_RETURN(pVCpu, VERR_VM_THREAD_NOT_EMT);
526	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
527	AssertReturn(hRegion < pVM->iom.s.cMmioRegs, VERR_IOM_INVALID_MMIO_HANDLE);
528	PIOMMMIOENTRYR3 const pRegEntry = &pVM->iom.s.paMmioRegs[hRegion];
529	AssertReturn(pRegEntry->pDevIns == pDevIns, VERR_IOM_INVALID_MMIO_HANDLE);
530
531	/*
532	* Do the mapping.
533	*/
534	int rc;
535	IOM_LOCK_EXCL(pVM);
536
537	if (pRegEntry->fMapped)
538	{
539	RTGCPHYS const GCPhys = pRegEntry->GCPhysMapping;
540	RTGCPHYS const GCPhysLast = GCPhys + pRegEntry->cbRegion - 1;
541	uint32_t const cEntries = RT_MIN(pVM->iom.s.cMmioLookupEntries, pVM->iom.s.cMmioRegs);
542	Assert(pVM->iom.s.cMmioLookupEntries == cEntries);
543	Assert(cEntries > 0);
544
545	PIOMMMIOLOOKUPENTRY paEntries = pVM->iom.s.paMmioLookup;
546	uint32_t iFirst = 0;
547	uint32_t iEnd = cEntries;
548	uint32_t i = cEntries / 2;
549	for (;;)
550	{
551	PIOMMMIOLOOKUPENTRY pEntry = &paEntries[i];
552	if (pEntry->GCPhysLast < GCPhys)
553	{
554	i += 1;
555	if (i < iEnd)
556	iFirst = i;
557	else
558	{
559	rc = VERR_IOM_MMIO_IPE_1;
560	AssertLogRelMsgFailedBreak(("%RGp..%RGp (%s) not found!\n", GCPhys, GCPhysLast, pRegEntry->pszDesc));
561	}
562	}
563	else if (pEntry->GCPhysFirst > GCPhysLast)
564	{
565	if (i > iFirst)
566	iEnd = i;
567	else
568	{
569	rc = VERR_IOM_MMIO_IPE_1;
570	AssertLogRelMsgFailedBreak(("%RGp..%RGp (%s) not found!\n", GCPhys, GCPhysLast, pRegEntry->pszDesc));
571	}
572	}
573	else if (pEntry->idx == hRegion)
574	{
575	Assert(pEntry->GCPhysFirst == GCPhys);
576	Assert(pEntry->GCPhysLast == GCPhysLast);
577	#ifdef VBOX_WITH_STATISTICS
578	iomR3MmioDeregStats(pVM, pRegEntry, GCPhys);
579	#endif
580	if (i + 1 < cEntries)
581	memmove(pEntry, pEntry + 1, sizeof(pEntry) (cEntries - i - 1));
582	pVM->iom.s.cMmioLookupEntries = cEntries - 1;
583
584	rc = PGMR3PhysMmioUnmap(pVM, pVCpu, GCPhys, pRegEntry->cbRegion, pRegEntry->idRamRange);
585	AssertRC(rc);
586
587	pRegEntry->fMapped = false;
588	ASMAtomicWriteU64(&pRegEntry->GCPhysMapping, NIL_RTGCPHYS);
589	break;
590	}
591	else
592	{
593	AssertLogRelMsgFailed(("Looking for %RGp..%RGp (%s), found %RGp..%RGp (%s) instead!\n",
594	GCPhys, GCPhysLast, pRegEntry->pszDesc,
595	pEntry->GCPhysFirst, pEntry->GCPhysLast, pVM->iom.s.paMmioRegs[pEntry->idx].pszDesc));
596	rc = VERR_IOM_MMIO_IPE_1;
597	break;
598	}
599
600	i = iFirst + (iEnd - iFirst) / 2;
601	}
602
603	#ifdef VBOX_STRICT
604	/*
605	* Assert table sanity.
606	*/
607	AssertMsg(paEntries[0].GCPhysLast >= paEntries[0].GCPhysFirst, ("%RGp %RGp\n", paEntries[0].GCPhysLast, paEntries[0].GCPhysFirst));
608	AssertMsg(paEntries[0].idx < pVM->iom.s.cMmioRegs, ("%#x %#x\n", paEntries[0].idx, pVM->iom.s.cMmioRegs));
609
610	RTGCPHYS GCPhysPrev = paEntries[0].GCPhysLast;
611	for (i = 1; i < cEntries - 1; i++)
612	{
613	AssertMsg(paEntries[i].GCPhysLast >= paEntries[i].GCPhysFirst, ("%u: %RGp %RGp\n", i, paEntries[i].GCPhysLast, paEntries[i].GCPhysFirst));
614	AssertMsg(paEntries[i].idx < pVM->iom.s.cMmioRegs, ("%u: %#x %#x\n", i, paEntries[i].idx, pVM->iom.s.cMmioRegs));
615	AssertMsg(GCPhysPrev < paEntries[i].GCPhysFirst, ("%u: %RGp %RGp\n", i, GCPhysPrev, paEntries[i].GCPhysFirst));
616	GCPhysPrev = paEntries[i].GCPhysLast;
617	}
618	#endif
619	}
620	else
621	{
622	AssertFailed();
623	rc = VERR_IOM_MMIO_REGION_NOT_MAPPED;
624	}
625
626	IOM_UNLOCK_EXCL(pVM);
627	return rc;
628	}
629
630
631	VMMR3_INT_DECL(int) IOMR3MmioReduce(PVM pVM, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion, RTGCPHYS cbRegion)
632	{
633	RT_NOREF(pVM, pDevIns, hRegion, cbRegion);
634	AssertFailed();
635	return VERR_NOT_IMPLEMENTED;
636	}
637
638
639	/**
640	* Validates @a hRegion, making sure it belongs to @a pDevIns.
641	*
642	* @returns VBox status code.
643	* @param pVM The cross context VM structure.
644	* @param pDevIns The device which allegedly owns @a hRegion.
645	* @param hRegion The handle to validate.
646	*/
647	VMMR3_INT_DECL(int) IOMR3MmioValidateHandle(PVM pVM, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion)
648	{
649	AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
650	AssertReturn(hRegion < RT_MIN(pVM->iom.s.cMmioRegs, pVM->iom.s.cMmioAlloc), VERR_IOM_INVALID_MMIO_HANDLE);
651	PIOMMMIOENTRYR3 const pRegEntry = &pVM->iom.s.paMmioRegs[hRegion];
652	AssertReturn(pRegEntry->pDevIns == pDevIns, VERR_IOM_INVALID_MMIO_HANDLE);
653	return VINF_SUCCESS;
654	}
655
656
657	/**
658	* Gets the mapping address of MMIO region @a hRegion.
659	*
660	* @returns Mapping address if mapped, NIL_RTGCPHYS if not mapped or invalid
661	* input.
662	* @param pVM The cross context VM structure.
663	* @param pDevIns The device which allegedly owns @a hRegion.
664	* @param hRegion The handle to validate.
665	*/
666	VMMR3_INT_DECL(RTGCPHYS) IOMR3MmioGetMappingAddress(PVM pVM, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion)
667	{
668	AssertPtrReturn(pDevIns, NIL_RTGCPHYS);
669	AssertReturn(hRegion < RT_MIN(pVM->iom.s.cMmioRegs, pVM->iom.s.cMmioAlloc), NIL_RTGCPHYS);
670	PIOMMMIOENTRYR3 const pRegEntry = &pVM->iom.s.paMmioRegs[hRegion];
671	AssertReturn(pRegEntry->pDevIns == pDevIns, NIL_RTGCPHYS);
672	return pRegEntry->GCPhysMapping;
673	}
674
675
676	/**
677	* Display all registered MMIO ranges.
678	*
679	* @param pVM The cross context VM structure.
680	* @param pHlp The info helpers.
681	* @param pszArgs Arguments, ignored.
682	*/
683	DECLCALLBACK(void) iomR3MmioInfo(PVM pVM, PCDBGFINFOHLP pHlp, const char *pszArgs)
684	{
685	RT_NOREF(pszArgs);
686
687	/* No locking needed here as registerations are only happening during VMSTATE_CREATING. */
688	pHlp->pfnPrintf(pHlp,
689	"MMIO registrations: %u (%u allocated)\n"
690	" ## Ctx %.s %.s PCI Description\n",
691	pVM->iom.s.cMmioRegs, pVM->iom.s.cMmioAlloc,
692	sizeof(RTGCPHYS) * 2, "Size",
693	sizeof(RTGCPHYS) * 2 * 2 + 1, "Mapping");
694	PIOMMMIOENTRYR3 paRegs = pVM->iom.s.paMmioRegs;
695	for (uint32_t i = 0; i < pVM->iom.s.cMmioRegs; i++)
696	{
697	const char * const pszRing = paRegs[i].fRing0 ? paRegs[i].fRawMode ? "+0+C" : "+0 "
698	: paRegs[i].fRawMode ? "+C " : " ";
699	if (paRegs[i].fMapped && paRegs[i].pPciDev)
700	pHlp->pfnPrintf(pHlp, "%3u R3%s %RGp %RGp-%RGp pci%u/%u %s\n", paRegs[i].idxSelf, pszRing, paRegs[i].cbRegion,
701	paRegs[i].GCPhysMapping, paRegs[i].GCPhysMapping + paRegs[i].cbRegion - 1,
702	paRegs[i].pPciDev->idxSubDev, paRegs[i].iPciRegion, paRegs[i].pszDesc);
703	else if (paRegs[i].fMapped && !paRegs[i].pPciDev)
704	pHlp->pfnPrintf(pHlp, "%3u R3%s %RGp %RGp-%RGp %s\n", paRegs[i].idxSelf, pszRing, paRegs[i].cbRegion,
705	paRegs[i].GCPhysMapping, paRegs[i].GCPhysMapping + paRegs[i].cbRegion - 1, paRegs[i].pszDesc);
706	else if (paRegs[i].pPciDev)
707	pHlp->pfnPrintf(pHlp, "%3u R3%s %RGp %.*s pci%u/%u %s\n", paRegs[i].idxSelf, pszRing, paRegs[i].cbRegion,
708	sizeof(RTGCPHYS) * 2, "unmapped", paRegs[i].pPciDev->idxSubDev, paRegs[i].iPciRegion, paRegs[i].pszDesc);
709	else
710	pHlp->pfnPrintf(pHlp, "%3u R3%s %RGp %.*s %s\n", paRegs[i].idxSelf, pszRing, paRegs[i].cbRegion,
711	sizeof(RTGCPHYS) * 2, "unmapped", paRegs[i].pszDesc);
712	}
713	}
714

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source: vbox/trunk/src/VBox/VMM/VMMR3/IOMR3Mmio.cpp@ 106952

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