DevPlayground.cpp@ 97441

Last change on this file since 97441 was 96407, checked in by vboxsync, 2 years ago
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1	/* $Id: DevPlayground.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* DevPlayground - Device for making PDM/PCI/... experiments.
4	*
5	* This device uses big PCI BAR64 resources, which needs the ICH9 chipset.
6	* The device works without any PCI config (because the default setup with the
7	* ICH9 chipset doesn't have anything at bus=0, device=0, function=0.
8	*
9	* To enable this device for a particular VM:
10	* VBoxManage setextradata vmname VBoxInternal/PDM/Devices/playground/Path .../obj/VBoxPlaygroundDevice/VBoxPlaygroundDevice
11	* VBoxManage setextradata vmname VBoxInternal/Devices/playground/0/Config/Whatever1 0
12	*/
13
14	/*
15	* Copyright (C) 2009-2022 Oracle and/or its affiliates.
16	*
17	* This file is part of VirtualBox base platform packages, as
18	* available from https://www.virtualbox.org.
19	*
20	* This program is free software; you can redistribute it and/or
21	* modify it under the terms of the GNU General Public License
22	* as published by the Free Software Foundation, in version 3 of the
23	* License.
24	*
25	* This program is distributed in the hope that it will be useful, but
26	* WITHOUT ANY WARRANTY; without even the implied warranty of
27	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
28	* General Public License for more details.
29	*
30	* You should have received a copy of the GNU General Public License
31	* along with this program; if not, see <https://www.gnu.org/licenses>.
32	*
33	* SPDX-License-Identifier: GPL-3.0-only
34	*/
35
36
37	/*********************************************************************************************************************************
38	* Header Files *
39	*********************************************************************************************************************************/
40	#define LOG_GROUP LOG_GROUP_MISC
41	#include <VBox/vmm/pdmdev.h>
42	#include <VBox/version.h>
43	#include <VBox/err.h>
44	#include <VBox/log.h>
45
46	#include <VBox/com/assert.h>
47	#include <VBox/com/defs.h>
48	#include <VBox/com/string.h>
49	#include <VBox/com/Guid.h>
50	#include <VBox/com/VirtualBox.h>
51
52	#include <iprt/assert.h>
53
54
55	/*********************************************************************************************************************************
56	* Structures and Typedefs *
57	*********************************************************************************************************************************/
58	/**
59	* Playground device per function (sub-device) data.
60	*/
61	typedef struct VBOXPLAYGROUNDDEVICEFUNCTION
62	{
63	/** The function number. */
64	uint8_t iFun;
65	/** Device function name. */
66	char szName[31];
67	/** MMIO region \#0 name. */
68	char szMmio0[32];
69	/** MMIO region \#2 name. */
70	char szMmio2[32];
71	/** The MMIO region \#0 handle. */
72	IOMMMIOHANDLE hMmio0;
73	/** The MMIO region \#2 handle. */
74	IOMMMIOHANDLE hMmio2;
75	/** Backing storage. */
76	uint8_t abBacking[4096];
77	} VBOXPLAYGROUNDDEVICEFUNCTION;
78	/** Pointer to a PCI function of the playground device. */
79	typedef VBOXPLAYGROUNDDEVICEFUNCTION *PVBOXPLAYGROUNDDEVICEFUNCTION;
80
81	/**
82	* Playground device instance data.
83	*/
84	typedef struct VBOXPLAYGROUNDDEVICE
85	{
86	/** PCI device functions. */
87	VBOXPLAYGROUNDDEVICEFUNCTION aPciFuns[8];
88	} VBOXPLAYGROUNDDEVICE;
89	/** Pointer to the instance data of a playground device instance. */
90	typedef VBOXPLAYGROUNDDEVICE *PVBOXPLAYGROUNDDEVICE;
91
92
93	#define PLAYGROUND_SSM_VERSION 3
94
95
96	/*********************************************************************************************************************************
97	* Device Functions *
98	*********************************************************************************************************************************/
99
100	/**
101	* @callback_method_impl{FNIOMMMIONEWREAD}
102	*/
103	static DECLCALLBACK(VBOXSTRICTRC) devPlaygroundMMIORead(PPDMDEVINS pDevIns, void pvUser, RTGCPHYS off, void pv, unsigned cb)
104	{
105	PVBOXPLAYGROUNDDEVICEFUNCTION pFun = (PVBOXPLAYGROUNDDEVICEFUNCTION)pvUser;
106	NOREF(pDevIns);
107
108	#ifdef LOG_ENABLED
109	unsigned const cbLog = cb;
110	RTGCPHYS offLog = off;
111	#endif
112	uint8_t pbDst = (uint8_t )pv;
113	while (cb-- > 0)
114	{
115	*pbDst = pFun->abBacking[off % RT_ELEMENTS(pFun->abBacking)];
116	pbDst++;
117	off++;
118	}
119
120	Log(("DevPlayGr/[%u]: READ off=%RGv cb=%u: %.*Rhxs\n", pFun->iFun, offLog, cbLog, cbLog, pv));
121	return VINF_SUCCESS;
122	}
123
124
125	/**
126	* @callback_method_impl{FNIOMMMIONEWWRITE}
127	*/
128	static DECLCALLBACK(VBOXSTRICTRC) devPlaygroundMMIOWrite(PPDMDEVINS pDevIns, void pvUser, RTGCPHYS off, void const pv, unsigned cb)
129	{
130	PVBOXPLAYGROUNDDEVICEFUNCTION pFun = (PVBOXPLAYGROUNDDEVICEFUNCTION)pvUser;
131	NOREF(pDevIns);
132	Log(("DevPlayGr/[%u]: WRITE off=%RGv cb=%u: %.*Rhxs\n", pFun->iFun, off, cb, cb, pv));
133
134	uint8_t const pbSrc = (uint8_t const )pv;
135	while (cb-- > 0)
136	{
137	pFun->abBacking[off % RT_ELEMENTS(pFun->abBacking)] = *pbSrc;
138	pbSrc++;
139	off++;
140	}
141
142	return VINF_SUCCESS;
143	}
144
145
146	/**
147	* @callback_method_impl{FNSSMDEVSAVEEXEC}
148	*/
149	static DECLCALLBACK(int) devPlaygroundSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
150	{
151	PVBOXPLAYGROUNDDEVICE pThis = PDMDEVINS_2_DATA(pDevIns, PVBOXPLAYGROUNDDEVICE);
152	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
153
154	/* dummy (real devices would need to save their state here) */
155	RT_NOREF(pThis);
156
157	/* Demo of some API stuff - very unusual, think twice if there's no better
158	* solution which doesn't need API interaction. */
159	#if 0
160	try
161	{
162	HRESULT hrc = S_OK;
163	com::Bstr bstrSnapName;
164	com::Guid uuid(COM_IIDOF(ISnapshot));
165	ISnapshot pSnap = (ISnapshot )PDMDevHlpQueryGenericUserObject(pDevIns, uuid.raw());
166	if (pSnap)
167	{
168	hrc = pSnap->COMGETTER(Name)(bstrSnapName.asOutParam());
169	AssertComRCReturn(hrc, VERR_INVALID_STATE);
170	}
171	com::Utf8Str strSnapName(bstrSnapName);
172	pHlp->pfnSSMPutStrZ(pSSM, strSnapName.c_str());
173	LogRel(("Playground: saving state of snapshot '%s', hrc=%Rhrc\n", strSnapName.c_str(), hrc));
174	}
175	catch (...)
176	{
177	AssertLogRelFailed();
178	return VERR_UNEXPECTED_EXCEPTION;
179	}
180	#else
181	pHlp->pfnSSMPutStrZ(pSSM, "playground");
182	#endif
183
184	return VINF_SUCCESS;
185	}
186
187
188	/**
189	* @callback_method_impl{FNSSMDEVLOADEXEC}
190	*/
191	static DECLCALLBACK(int) devPlaygroundLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
192	{
193	PVBOXPLAYGROUNDDEVICE pThis = PDMDEVINS_2_DATA(pDevIns, PVBOXPLAYGROUNDDEVICE);
194	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
195
196	if (uVersion > PLAYGROUND_SSM_VERSION)
197	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
198	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
199
200	/* dummy (real devices would need to load their state here) */
201	RT_NOREF(pThis);
202
203	/* Reading the stuff written to saved state, just a demo. */
204	char szSnapName[256];
205	int rc = pHlp->pfnSSMGetStrZ(pSSM, szSnapName, sizeof(szSnapName));
206	AssertRCReturn(rc, rc);
207	LogRel(("Playground: loading state of snapshot '%s'\n", szSnapName));
208
209	return VINF_SUCCESS;
210	}
211
212
213	/**
214	* @interface_method_impl{PDMDEVREG,pfnDestruct}
215	*/
216	static DECLCALLBACK(int) devPlaygroundDestruct(PPDMDEVINS pDevIns)
217	{
218	/*
219	* Check the versions here as well since the destructor is always called.
220	* THIS IS ALWAYS THE FIRST STATEMENT IN A DESTRUCTOR!
221	*/
222	PDMDEV_CHECK_VERSIONS_RETURN_QUIET(pDevIns);
223
224	return VINF_SUCCESS;
225	}
226
227
228	/**
229	* @interface_method_impl{PDMDEVREG,pfnConstruct}
230	*/
231	static DECLCALLBACK(int) devPlaygroundConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
232	{
233	/*
234	* Check that the device instance and device helper structures are compatible.
235	* THIS IS ALWAYS THE FIRST STATEMENT IN A CONSTRUCTOR!
236	*/
237	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns); /* This must come first. */
238	Assert(iInstance == 0); RT_NOREF(iInstance);
239
240	/*
241	* Initialize the instance data so that the destructor won't mess up.
242	*/
243	PVBOXPLAYGROUNDDEVICE pThis = PDMDEVINS_2_DATA(pDevIns, PVBOXPLAYGROUNDDEVICE);
244
245	/*
246	* Validate and read the configuration.
247	*/
248	PDMDEV_VALIDATE_CONFIG_RETURN(pDevIns, "Whatever1\|NumFunctions\|BigBAR0MB\|BigBAR0GB\|BigBAR2MB\|BigBAR2GB", "");
249
250	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
251
252	uint8_t uNumFunctions;
253	AssertCompile(RT_ELEMENTS(pThis->aPciFuns) <= RT_ELEMENTS(pDevIns->apPciDevs));
254	int rc = pHlp->pfnCFGMQueryU8Def(pCfg, "NumFunctions", &uNumFunctions, RT_ELEMENTS(pThis->aPciFuns));
255	if (RT_FAILURE(rc))
256	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to query integer value \"NumFunctions\""));
257	if ((uNumFunctions < 1) \|\| (uNumFunctions > RT_ELEMENTS(pThis->aPciFuns)))
258	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Invalid \"NumFunctions\" value (must be between 1 and 8)"));
259
260	RTGCPHYS cbFirstBAR;
261	uint16_t uBigBAR0GB;
262	rc = pHlp->pfnCFGMQueryU16Def(pCfg, "BigBAR0GB", &uBigBAR0GB, 0); /* Default to nothing. */
263	if (RT_FAILURE(rc))
264	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to query integer value \"BigBAR0GB\""));
265	if (uBigBAR0GB > 512)
266	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Invalid \"BigBAR0GB\" value (must be 512 or less)"));
267
268	if (uBigBAR0GB)
269	cbFirstBAR = uBigBAR0GB * _1G64;
270	else
271	{
272	uint16_t uBigBAR0MB;
273	rc = pHlp->pfnCFGMQueryU16Def(pCfg, "BigBAR0MB", &uBigBAR0MB, 8); /* 8 MB default. */
274	if (RT_FAILURE(rc))
275	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to query integer value \"BigBAR0MB\""));
276	if (uBigBAR0MB < 1 \|\| uBigBAR0MB > 4095)
277	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Invalid \"BigBAR0MB\" value (must be between 1 and 4095)"));
278	cbFirstBAR = uBigBAR0MB * _1M;
279	}
280
281	RTGCPHYS cbSecondBAR;
282	uint16_t uBigBAR2GB;
283	rc = pHlp->pfnCFGMQueryU16Def(pCfg, "BigBAR2GB", &uBigBAR2GB, 0); /* Default to nothing. */
284	if (RT_FAILURE(rc))
285	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to query integer value \"BigBAR2GB\""));
286	if (uBigBAR2GB > 512)
287	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Invalid \"BigBAR2GB\" value (must be 512 or less)"));
288
289	if (uBigBAR2GB)
290	cbSecondBAR = uBigBAR2GB * _1G64;
291	else
292	{
293	uint16_t uBigBAR2MB;
294	rc = pHlp->pfnCFGMQueryU16Def(pCfg, "BigBAR2MB", &uBigBAR2MB, 16); /* 16 MB default. */
295	if (RT_FAILURE(rc))
296	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to query integer value \"BigBAR2MB\""));
297	if (uBigBAR2MB < 1 \|\| uBigBAR2MB > 4095)
298	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Invalid \"BigBAR2MB\" value (must be between 1 and 4095)"));
299	cbSecondBAR = uBigBAR2MB * _1M;
300	}
301
302
303	/*
304	* PCI device setup.
305	*/
306	uint32_t iPciDevNo = PDMPCIDEVREG_DEV_NO_FIRST_UNUSED;
307	for (uint32_t iPciFun = 0; iPciFun < uNumFunctions; iPciFun++)
308	{
309	PPDMPCIDEV pPciDev = pDevIns->apPciDevs[iPciFun];
310	PVBOXPLAYGROUNDDEVICEFUNCTION pFun = &pThis->aPciFuns[iPciFun];
311	RTStrPrintf(pFun->szName, sizeof(pFun->szName), "playground%u", iPciFun);
312	pFun->iFun = iPciFun;
313
314	PDMPCIDEV_ASSERT_VALID(pDevIns, pPciDev);
315
316	PDMPciDevSetVendorId(pPciDev, 0x80ee);
317	PDMPciDevSetDeviceId(pPciDev, 0xde4e);
318	PDMPciDevSetClassBase(pPciDev, 0x07); /* communications device */
319	PDMPciDevSetClassSub(pPciDev, 0x80); /* other communications device */
320	if (iPciFun == 0) /* only for the primary function */
321	PDMPciDevSetHeaderType(pPciDev, 0x80); /* normal, multifunction device */
322
323	rc = PDMDevHlpPCIRegisterEx(pDevIns, pPciDev, 0 /fFlags/, iPciDevNo, iPciFun, pThis->aPciFuns[iPciFun].szName);
324	AssertLogRelRCReturn(rc, rc);
325
326	/* First region. */
327	RTGCPHYS const cbFirst = iPciFun == 0 ? cbFirstBAR : iPciFun * _4K;
328	RTStrPrintf(pFun->szMmio0, sizeof(pFun->szMmio0), "PG-F%d-BAR0", iPciFun);
329	rc = PDMDevHlpMmioCreate(pDevIns, cbFirst, pPciDev, 0 /iPciRegion/,
330	devPlaygroundMMIOWrite, devPlaygroundMMIORead, pFun,
331	IOMMMIO_FLAGS_READ_PASSTHRU \| IOMMMIO_FLAGS_WRITE_PASSTHRU, pFun->szMmio0, &pFun->hMmio0);
332	AssertLogRelRCReturn(rc, rc);
333
334	rc = PDMDevHlpPCIIORegionRegisterMmioEx(pDevIns, pPciDev, 0, cbFirst,
335	(PCIADDRESSSPACE)( PCI_ADDRESS_SPACE_MEM \| PCI_ADDRESS_SPACE_BAR64
336	\| (iPciFun == 0 ? PCI_ADDRESS_SPACE_MEM_PREFETCH : 0)),
337	pFun->hMmio0, NULL);
338	AssertLogRelRCReturn(rc, rc);
339
340	/* Second region. */
341	RTGCPHYS const cbSecond = iPciFun == 0 ? cbSecondBAR : iPciFun * _32K;
342	RTStrPrintf(pFun->szMmio2, sizeof(pFun->szMmio2), "PG-F%d-BAR2", iPciFun);
343	rc = PDMDevHlpMmioCreate(pDevIns, cbSecond, pPciDev, 2 << 16 /iPciRegion/,
344	devPlaygroundMMIOWrite, devPlaygroundMMIORead, pFun,
345	IOMMMIO_FLAGS_READ_PASSTHRU \| IOMMMIO_FLAGS_WRITE_PASSTHRU, pFun->szMmio2, &pFun->hMmio2);
346	AssertLogRelRCReturn(rc, rc);
347
348	rc = PDMDevHlpPCIIORegionRegisterMmioEx(pDevIns, pPciDev, 2, cbSecond,
349	(PCIADDRESSSPACE)( PCI_ADDRESS_SPACE_MEM \| PCI_ADDRESS_SPACE_BAR64
350	\| (iPciFun == 0 ? PCI_ADDRESS_SPACE_MEM_PREFETCH : 0)),
351	pFun->hMmio2, NULL);
352	AssertLogRelRCReturn(rc, rc);
353
354	/* Subsequent function should use the same major as the previous one. */
355	iPciDevNo = PDMPCIDEVREG_DEV_NO_SAME_AS_PREV;
356	}
357
358	/*
359	* Save state handling.
360	*/
361	rc = PDMDevHlpSSMRegister(pDevIns, PLAYGROUND_SSM_VERSION, sizeof(*pThis), devPlaygroundSaveExec, devPlaygroundLoadExec);
362	if (RT_FAILURE(rc))
363	return rc;
364
365	return VINF_SUCCESS;
366	}
367
368
369	/**
370	* The device registration structure.
371	*/
372	static const PDMDEVREG g_DevicePlayground =
373	{
374	/* .u32Version = */ PDM_DEVREG_VERSION,
375	/* .uReserved0 = */ 0,
376	/* .szName = */ "playground",
377	/* .fFlags = */ PDM_DEVREG_FLAGS_DEFAULT_BITS \| PDM_DEVREG_FLAGS_NEW_STYLE,
378	/* .fClass = */ PDM_DEVREG_CLASS_MISC,
379	/* .cMaxInstances = */ 1,
380	/* .uSharedVersion = */ 42,
381	/* .cbInstanceShared = */ sizeof(VBOXPLAYGROUNDDEVICE),
382	/* .cbInstanceCC = */ 0,
383	/* .cbInstanceRC = */ 0,
384	/* .cMaxPciDevices = */ 8,
385	/* .cMaxMsixVectors = */ 0,
386	/* .pszDescription = */ "VBox Playground Device.",
387	#if defined(IN_RING3)
388	/* .pszRCMod = */ "",
389	/* .pszR0Mod = */ "",
390	/* .pfnConstruct = */ devPlaygroundConstruct,
391	/* .pfnDestruct = */ devPlaygroundDestruct,
392	/* .pfnRelocate = */ NULL,
393	/* .pfnMemSetup = */ NULL,
394	/* .pfnPowerOn = */ NULL,
395	/* .pfnReset = */ NULL,
396	/* .pfnSuspend = */ NULL,
397	/* .pfnResume = */ NULL,
398	/* .pfnAttach = */ NULL,
399	/* .pfnDetach = */ NULL,
400	/* .pfnQueryInterface = */ NULL,
401	/* .pfnInitComplete = */ NULL,
402	/* .pfnPowerOff = */ NULL,
403	/* .pfnSoftReset = */ NULL,
404	/* .pfnReserved0 = */ NULL,
405	/* .pfnReserved1 = */ NULL,
406	/* .pfnReserved2 = */ NULL,
407	/* .pfnReserved3 = */ NULL,
408	/* .pfnReserved4 = */ NULL,
409	/* .pfnReserved5 = */ NULL,
410	/* .pfnReserved6 = */ NULL,
411	/* .pfnReserved7 = */ NULL,
412	#elif defined(IN_RING0)
413	/* .pfnEarlyConstruct = */ NULL,
414	/* .pfnConstruct = */ NULL,
415	/* .pfnDestruct = */ NULL,
416	/* .pfnFinalDestruct = */ NULL,
417	/* .pfnRequest = */ NULL,
418	/* .pfnReserved0 = */ NULL,
419	/* .pfnReserved1 = */ NULL,
420	/* .pfnReserved2 = */ NULL,
421	/* .pfnReserved3 = */ NULL,
422	/* .pfnReserved4 = */ NULL,
423	/* .pfnReserved5 = */ NULL,
424	/* .pfnReserved6 = */ NULL,
425	/* .pfnReserved7 = */ NULL,
426	#elif defined(IN_RC)
427	/* .pfnConstruct = */ NULL,
428	/* .pfnReserved0 = */ NULL,
429	/* .pfnReserved1 = */ NULL,
430	/* .pfnReserved2 = */ NULL,
431	/* .pfnReserved3 = */ NULL,
432	/* .pfnReserved4 = */ NULL,
433	/* .pfnReserved5 = */ NULL,
434	/* .pfnReserved6 = */ NULL,
435	/* .pfnReserved7 = */ NULL,
436	#else
437	# error "Not in IN_RING3, IN_RING0 or IN_RC!"
438	#endif
439	/* .u32VersionEnd = */ PDM_DEVREG_VERSION
440	};
441
442
443	/**
444	* Register devices provided by the plugin.
445	*
446	* @returns VBox status code.
447	* @param pCallbacks Pointer to the callback table.
448	* @param u32Version VBox version number.
449	*/
450	extern "C" DECLEXPORT(int) VBoxDevicesRegister(PPDMDEVREGCB pCallbacks, uint32_t u32Version)
451	{
452	LogFlow(("VBoxPlaygroundDevice::VBoxDevicesRegister: u32Version=%#x pCallbacks->u32Version=%#x\n", u32Version, pCallbacks->u32Version));
453
454	AssertLogRelMsgReturn(u32Version >= VBOX_VERSION,
455	("VirtualBox version %#x, expected %#x or higher\n", u32Version, VBOX_VERSION),
456	VERR_VERSION_MISMATCH);
457	AssertLogRelMsgReturn(pCallbacks->u32Version == PDM_DEVREG_CB_VERSION,
458	("callback version %#x, expected %#x\n", pCallbacks->u32Version, PDM_DEVREG_CB_VERSION),
459	VERR_VERSION_MISMATCH);
460
461	return pCallbacks->pfnRegister(pCallbacks, &g_DevicePlayground);
462	}
463

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source: vbox/trunk/src/VBox/Devices/Samples/DevPlayground.cpp@ 97441

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