PDMDevice.cpp@ 45103

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1	/* $Id: PDMDevice.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* PDM - Pluggable Device and Driver Manager, Device parts.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 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_PDM_DEVICE
23	#include "PDMInternal.h"
24	#include <VBox/vmm/pdm.h>
25	#include <VBox/vmm/mm.h>
26	#include <VBox/vmm/pgm.h>
27	#include <VBox/vmm/iom.h>
28	#include <VBox/vmm/cfgm.h>
29	#ifdef VBOX_WITH_REM
30	# include <VBox/vmm/rem.h>
31	#endif
32	#include <VBox/vmm/dbgf.h>
33	#include <VBox/vmm/vm.h>
34	#include <VBox/vmm/uvm.h>
35	#include <VBox/vmm/vmm.h>
36
37	#include <VBox/version.h>
38	#include <VBox/log.h>
39	#include <VBox/err.h>
40	#include <iprt/alloc.h>
41	#include <iprt/alloca.h>
42	#include <iprt/asm.h>
43	#include <iprt/assert.h>
44	#include <iprt/path.h>
45	#include <iprt/semaphore.h>
46	#include <iprt/string.h>
47	#include <iprt/thread.h>
48
49
50	/*******************************************************************************
51	* Structures and Typedefs *
52	*******************************************************************************/
53	/**
54	* Internal callback structure pointer.
55	* The main purpose is to define the extra data we associate
56	* with PDMDEVREGCB so we can find the VM instance and so on.
57	*/
58	typedef struct PDMDEVREGCBINT
59	{
60	/** The callback structure. */
61	PDMDEVREGCB Core;
62	/** A bit of padding. */
63	uint32_t u32[4];
64	/** VM Handle. */
65	PVM pVM;
66	/** Pointer to the configuration node the registrations should be
67	* associated with. Can be NULL. */
68	PCFGMNODE pCfgNode;
69	} PDMDEVREGCBINT;
70	/** Pointer to a PDMDEVREGCBINT structure. */
71	typedef PDMDEVREGCBINT *PPDMDEVREGCBINT;
72	/** Pointer to a const PDMDEVREGCBINT structure. */
73	typedef const PDMDEVREGCBINT *PCPDMDEVREGCBINT;
74
75
76	/*******************************************************************************
77	* Internal Functions *
78	*******************************************************************************/
79	static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pReg);
80	static int pdmR3DevLoadModules(PVM pVM);
81	static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char pszFilename, const char pszName);
82
83
84
85
86	/**
87	* This function will initialize the devices for this VM instance.
88	*
89	*
90	* First of all this mean loading the builtin device and letting them
91	* register themselves. Beyond that any additional device modules are
92	* loaded and called for registration.
93	*
94	* Then the device configuration is enumerated, the instantiation order
95	* is determined, and finally they are instantiated.
96	*
97	* After all devices have been successfully instantiated the primary
98	* PCI Bus device is called to emulate the PCI BIOS, i.e. making the
99	* resource assignments. If there is no PCI device, this step is of course
100	* skipped.
101	*
102	* Finally the init completion routines of the instantiated devices
103	* are called.
104	*
105	* @returns VBox status code.
106	* @param pVM Pointer to the VM.
107	*/
108	int pdmR3DevInit(PVM pVM)
109	{
110	LogFlow(("pdmR3DevInit:\n"));
111
112	AssertRelease(!(RT_OFFSETOF(PDMDEVINS, achInstanceData) & 15));
113	AssertRelease(sizeof(pVM->pdm.s.pDevInstances->Internal.s) <= sizeof(pVM->pdm.s.pDevInstances->Internal.padding));
114
115	/*
116	* Load device modules.
117	*/
118	int rc = pdmR3DevLoadModules(pVM);
119	if (RT_FAILURE(rc))
120	return rc;
121
122	#ifdef VBOX_WITH_USB
123	/* ditto for USB Devices. */
124	rc = pdmR3UsbLoadModules(pVM);
125	if (RT_FAILURE(rc))
126	return rc;
127	#endif
128
129	/*
130	* Get the RC & R0 devhlps and create the devhlp R3 task queue.
131	*/
132	PCPDMDEVHLPRC pHlpRC;
133	rc = PDMR3LdrGetSymbolRC(pVM, NULL, "g_pdmRCDevHlp", &pHlpRC);
134	AssertReleaseRCReturn(rc, rc);
135
136	PCPDMDEVHLPR0 pHlpR0;
137	rc = PDMR3LdrGetSymbolR0(pVM, NULL, "g_pdmR0DevHlp", &pHlpR0);
138	AssertReleaseRCReturn(rc, rc);
139
140	rc = PDMR3QueueCreateInternal(pVM, sizeof(PDMDEVHLPTASK), 8, 0, pdmR3DevHlpQueueConsumer, true, "DevHlp",
141	&pVM->pdm.s.pDevHlpQueueR3);
142	AssertRCReturn(rc, rc);
143	pVM->pdm.s.pDevHlpQueueR0 = PDMQueueR0Ptr(pVM->pdm.s.pDevHlpQueueR3);
144	pVM->pdm.s.pDevHlpQueueRC = PDMQueueRCPtr(pVM->pdm.s.pDevHlpQueueR3);
145
146
147	/*
148	*
149	* Enumerate the device instance configurations
150	* and come up with a instantiation order.
151	*
152	*/
153	/* Switch to /Devices, which contains the device instantiations. */
154	PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "Devices");
155
156	/*
157	* Count the device instances.
158	*/
159	PCFGMNODE pCur;
160	PCFGMNODE pInstanceNode;
161	unsigned cDevs = 0;
162	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
163	for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode))
164	cDevs++;
165	if (!cDevs)
166	{
167	Log(("PDM: No devices were configured!\n"));
168	return VINF_SUCCESS;
169	}
170	Log2(("PDM: cDevs=%d!\n", cDevs));
171
172	/*
173	* Collect info on each device instance.
174	*/
175	struct DEVORDER
176	{
177	/** Configuration node. */
178	PCFGMNODE pNode;
179	/** Pointer to device. */
180	PPDMDEV pDev;
181	/** Init order. */
182	uint32_t u32Order;
183	/** VBox instance number. */
184	uint32_t iInstance;
185	} paDevs = (struct DEVORDER )alloca(sizeof(paDevs[0]) * (cDevs + 1)); /* (One extra for swapping) */
186	Assert(paDevs);
187	unsigned i = 0;
188	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
189	{
190	/* Get the device name. */
191	char szName[sizeof(paDevs[0].pDev->pReg->szName)];
192	rc = CFGMR3GetName(pCur, szName, sizeof(szName));
193	AssertMsgRCReturn(rc, ("Configuration error: device name is too long (or something)! rc=%Rrc\n", rc), rc);
194
195	/* Find the device. */
196	PPDMDEV pDev = pdmR3DevLookup(pVM, szName);
197	AssertLogRelMsgReturn(pDev, ("Configuration error: device '%s' not found!\n", szName), VERR_PDM_DEVICE_NOT_FOUND);
198
199	/* Configured priority or use default based on device class? */
200	uint32_t u32Order;
201	rc = CFGMR3QueryU32(pCur, "Priority", &u32Order);
202	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
203	{
204	uint32_t u32 = pDev->pReg->fClass;
205	for (u32Order = 1; !(u32 & u32Order); u32Order <<= 1)
206	/* nop */;
207	}
208	else
209	AssertMsgRCReturn(rc, ("Configuration error: reading \"Priority\" for the '%s' device failed rc=%Rrc!\n", szName, rc), rc);
210
211	/* Enumerate the device instances. */
212	uint32_t const iStart = i;
213	for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode))
214	{
215	paDevs[i].pNode = pInstanceNode;
216	paDevs[i].pDev = pDev;
217	paDevs[i].u32Order = u32Order;
218
219	/* Get the instance number. */
220	char szInstance[32];
221	rc = CFGMR3GetName(pInstanceNode, szInstance, sizeof(szInstance));
222	AssertMsgRCReturn(rc, ("Configuration error: instance name is too long (or something)! rc=%Rrc\n", rc), rc);
223	char *pszNext = NULL;
224	rc = RTStrToUInt32Ex(szInstance, &pszNext, 0, &paDevs[i].iInstance);
225	AssertMsgRCReturn(rc, ("Configuration error: RTStrToInt32Ex failed on the instance name '%s'! rc=%Rrc\n", szInstance, rc), rc);
226	AssertMsgReturn(!*pszNext, ("Configuration error: the instance name '%s' isn't all digits. (%s)\n", szInstance, pszNext), VERR_INVALID_PARAMETER);
227
228	/* next instance */
229	i++;
230	}
231
232	/* check the number of instances */
233	if (i - iStart > pDev->pReg->cMaxInstances)
234	AssertLogRelMsgFailedReturn(("Configuration error: Too many instances of %s was configured: %u, max %u\n",
235	szName, i - iStart, pDev->pReg->cMaxInstances),
236	VERR_PDM_TOO_MANY_DEVICE_INSTANCES);
237	} /* devices */
238	Assert(i == cDevs);
239
240	/*
241	* Sort the device array ascending on u32Order. (bubble)
242	*/
243	unsigned c = cDevs - 1;
244	while (c)
245	{
246	unsigned j = 0;
247	for (i = 0; i < c; i++)
248	if (paDevs[i].u32Order > paDevs[i + 1].u32Order)
249	{
250	paDevs[cDevs] = paDevs[i + 1];
251	paDevs[i + 1] = paDevs[i];
252	paDevs[i] = paDevs[cDevs];
253	j = i;
254	}
255	c = j;
256	}
257
258
259	/*
260	*
261	* Instantiate the devices.
262	*
263	*/
264	for (i = 0; i < cDevs; i++)
265	{
266	/*
267	* Gather a bit of config.
268	*/
269	/* trusted */
270	bool fTrusted;
271	rc = CFGMR3QueryBool(paDevs[i].pNode, "Trusted", &fTrusted);
272	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
273	fTrusted = false;
274	else if (RT_FAILURE(rc))
275	{
276	AssertMsgFailed(("configuration error: failed to query boolean \"Trusted\", rc=%Rrc\n", rc));
277	return rc;
278	}
279	/* config node */
280	PCFGMNODE pConfigNode = CFGMR3GetChild(paDevs[i].pNode, "Config");
281	if (!pConfigNode)
282	{
283	rc = CFGMR3InsertNode(paDevs[i].pNode, "Config", &pConfigNode);
284	if (RT_FAILURE(rc))
285	{
286	AssertMsgFailed(("Failed to create Config node! rc=%Rrc\n", rc));
287	return rc;
288	}
289	}
290	CFGMR3SetRestrictedRoot(pConfigNode);
291
292	/*
293	* Allocate the device instance and critical section.
294	*/
295	AssertReturn(paDevs[i].pDev->cInstances < paDevs[i].pDev->pReg->cMaxInstances, VERR_PDM_TOO_MANY_DEVICE_INSTANCES);
296	size_t cb = RT_OFFSETOF(PDMDEVINS, achInstanceData[paDevs[i].pDev->pReg->cbInstance]);
297	cb = RT_ALIGN_Z(cb, 16);
298	PPDMDEVINS pDevIns;
299	if (paDevs[i].pDev->pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0))
300	rc = MMR3HyperAllocOnceNoRel(pVM, cb, 0, MM_TAG_PDM_DEVICE, (void **)&pDevIns);
301	else
302	rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_DEVICE, cb, (void **)&pDevIns);
303	AssertLogRelMsgRCReturn(rc,
304	("Failed to allocate %d bytes of instance data for device '%s'. rc=%Rrc\n",
305	cb, paDevs[i].pDev->pReg->szName, rc),
306	rc);
307	PPDMCRITSECT pCritSect;
308	if (paDevs[i].pDev->pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0))
309	rc = MMHyperAlloc(pVM, sizeof(pCritSect), 0, MM_TAG_PDM_DEVICE, (void *)&pCritSect);
310	else
311	rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_DEVICE, sizeof(pCritSect), (void *)&pCritSect);
312	AssertLogRelMsgRCReturn(rc, ("Failed to allocate a critical section for the device\n", rc), rc);
313
314	/*
315	* Initialize it.
316	*/
317	pDevIns->u32Version = PDM_DEVINS_VERSION;
318	pDevIns->iInstance = paDevs[i].iInstance;
319	//pDevIns->Internal.s.pNextR3 = NULL;
320	//pDevIns->Internal.s.pPerDeviceNextR3 = NULL;
321	pDevIns->Internal.s.pDevR3 = paDevs[i].pDev;
322	pDevIns->Internal.s.pVMR3 = pVM;
323	pDevIns->Internal.s.pVMR0 = pVM->pVMR0;
324	pDevIns->Internal.s.pVMRC = pVM->pVMRC;
325	//pDevIns->Internal.s.pLunsR3 = NULL;
326	pDevIns->Internal.s.pCfgHandle = paDevs[i].pNode;
327	//pDevIns->Internal.s.pPciDeviceR3 = NULL;
328	//pDevIns->Internal.s.pPciBusR3 = NULL;
329	//pDevIns->Internal.s.pPciDeviceR0 = 0;
330	//pDevIns->Internal.s.pPciBusR0 = 0;
331	//pDevIns->Internal.s.pPciDeviceRC = 0;
332	//pDevIns->Internal.s.pPciBusRC = 0;
333	pDevIns->Internal.s.fIntFlags = PDMDEVINSINT_FLAGS_SUSPENDED;
334	//pDevIns->Internal.s.uLastIrqTag = 0;
335	pDevIns->pHlpR3 = fTrusted ? &g_pdmR3DevHlpTrusted : &g_pdmR3DevHlpUnTrusted;
336	pDevIns->pHlpRC = pHlpRC;
337	pDevIns->pHlpR0 = pHlpR0;
338	pDevIns->pReg = paDevs[i].pDev->pReg;
339	pDevIns->pCfg = pConfigNode;
340	//pDevIns->IBase.pfnQueryInterface = NULL;
341	//pDevIns->fTracing = 0;
342	pDevIns->idTracing = ++pVM->pdm.s.idTracingDev;
343	pDevIns->pvInstanceDataR3 = &pDevIns->achInstanceData[0];
344	pDevIns->pvInstanceDataRC = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC
345	? MMHyperR3ToRC(pVM, pDevIns->pvInstanceDataR3) : NIL_RTRCPTR;
346	pDevIns->pvInstanceDataR0 = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0
347	? MMHyperR3ToR0(pVM, pDevIns->pvInstanceDataR3) : NIL_RTR0PTR;
348
349	pDevIns->pCritSectRoR3 = pCritSect;
350	pDevIns->pCritSectRoRC = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC
351	? MMHyperR3ToRC(pVM, pCritSect) : NIL_RTRCPTR;
352	pDevIns->pCritSectRoR0 = pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_R0
353	? MMHyperR3ToR0(pVM, pCritSect) : NIL_RTR0PTR;
354
355	rc = pdmR3CritSectInitDeviceAuto(pVM, pDevIns, pCritSect, RT_SRC_POS,
356	"%s#%uAuto", pDevIns->pReg->szName, pDevIns->iInstance);
357	AssertLogRelRCReturn(rc, rc);
358
359	/*
360	* Link it into all the lists.
361	*/
362	/* The global instance FIFO. */
363	PPDMDEVINS pPrev1 = pVM->pdm.s.pDevInstances;
364	if (!pPrev1)
365	pVM->pdm.s.pDevInstances = pDevIns;
366	else
367	{
368	while (pPrev1->Internal.s.pNextR3)
369	pPrev1 = pPrev1->Internal.s.pNextR3;
370	pPrev1->Internal.s.pNextR3 = pDevIns;
371	}
372
373	/* The per device instance FIFO. */
374	PPDMDEVINS pPrev2 = paDevs[i].pDev->pInstances;
375	if (!pPrev2)
376	paDevs[i].pDev->pInstances = pDevIns;
377	else
378	{
379	while (pPrev2->Internal.s.pPerDeviceNextR3)
380	pPrev2 = pPrev2->Internal.s.pPerDeviceNextR3;
381	pPrev2->Internal.s.pPerDeviceNextR3 = pDevIns;
382	}
383
384	/*
385	* Call the constructor.
386	*/
387	paDevs[i].pDev->cInstances++;
388	Log(("PDM: Constructing device '%s' instance %d...\n", pDevIns->pReg->szName, pDevIns->iInstance));
389	rc = pDevIns->pReg->pfnConstruct(pDevIns, pDevIns->iInstance, pDevIns->pCfg);
390	if (RT_FAILURE(rc))
391	{
392	LogRel(("PDM: Failed to construct '%s'/%d! %Rra\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
393	paDevs[i].pDev->cInstances--;
394	/* Because we're damn lazy, the destructor will be called even if
395	the constructor fails. So, no unlinking. */
396	return rc == VERR_VERSION_MISMATCH ? VERR_PDM_DEVICE_VERSION_MISMATCH : rc;
397	}
398	} /* for device instances */
399
400	#ifdef VBOX_WITH_USB
401	/* ditto for USB Devices. */
402	rc = pdmR3UsbInstantiateDevices(pVM);
403	if (RT_FAILURE(rc))
404	return rc;
405	#endif
406
407
408	/*
409	*
410	* PCI BIOS Fake and Init Complete.
411	*
412	*/
413	if (pVM->pdm.s.aPciBuses[0].pDevInsR3)
414	{
415	pdmLock(pVM);
416	rc = pVM->pdm.s.aPciBuses[0].pfnFakePCIBIOSR3(pVM->pdm.s.aPciBuses[0].pDevInsR3);
417	pdmUnlock(pVM);
418	if (RT_FAILURE(rc))
419	{
420	AssertMsgFailed(("PCI BIOS fake failed rc=%Rrc\n", rc));
421	return rc;
422	}
423	}
424
425	for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
426	{
427	if (pDevIns->pReg->pfnInitComplete)
428	{
429	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
430	rc = pDevIns->pReg->pfnInitComplete(pDevIns);
431	PDMCritSectLeave(pDevIns->pCritSectRoR3);
432	if (RT_FAILURE(rc))
433	{
434	AssertMsgFailed(("InitComplete on device '%s'/%d failed with rc=%Rrc\n",
435	pDevIns->pReg->szName, pDevIns->iInstance, rc));
436	return rc;
437	}
438	}
439	}
440
441	#ifdef VBOX_WITH_USB
442	/* ditto for USB Devices. */
443	rc = pdmR3UsbVMInitComplete(pVM);
444	if (RT_FAILURE(rc))
445	return rc;
446	#endif
447
448	LogFlow(("pdmR3DevInit: returns %Rrc\n", VINF_SUCCESS));
449	return VINF_SUCCESS;
450	}
451
452
453	/**
454	* Lookups a device structure by name.
455	* @internal
456	*/
457	PPDMDEV pdmR3DevLookup(PVM pVM, const char *pszName)
458	{
459	size_t cchName = strlen(pszName);
460	for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext)
461	if ( pDev->cchName == cchName
462	&& !strcmp(pDev->pReg->szName, pszName))
463	return pDev;
464	return NULL;
465	}
466
467
468	/**
469	* Loads the device modules.
470	*
471	* @returns VBox status code.
472	* @param pVM Pointer to the VM.
473	*/
474	static int pdmR3DevLoadModules(PVM pVM)
475	{
476	/*
477	* Initialize the callback structure.
478	*/
479	PDMDEVREGCBINT RegCB;
480	RegCB.Core.u32Version = PDM_DEVREG_CB_VERSION;
481	RegCB.Core.pfnRegister = pdmR3DevReg_Register;
482	RegCB.pVM = pVM;
483	RegCB.pCfgNode = NULL;
484
485	/*
486	* Load the builtin module
487	*/
488	PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "PDM/Devices");
489	bool fLoadBuiltin;
490	int rc = CFGMR3QueryBool(pDevicesNode, "LoadBuiltin", &fLoadBuiltin);
491	if (rc == VERR_CFGM_VALUE_NOT_FOUND \|\| rc == VERR_CFGM_NO_PARENT)
492	fLoadBuiltin = true;
493	else if (RT_FAILURE(rc))
494	{
495	AssertMsgFailed(("Configuration error: Querying boolean \"LoadBuiltin\" failed with %Rrc\n", rc));
496	return rc;
497	}
498	if (fLoadBuiltin)
499	{
500	/* make filename */
501	char pszFilename = pdmR3FileR3("VBoxDD", true /fShared*/);
502	if (!pszFilename)
503	return VERR_NO_TMP_MEMORY;
504	rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD");
505	RTMemTmpFree(pszFilename);
506	if (RT_FAILURE(rc))
507	return rc;
508
509	/* make filename */
510	pszFilename = pdmR3FileR3("VBoxDD2", true /fShared/);
511	if (!pszFilename)
512	return VERR_NO_TMP_MEMORY;
513	rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD2");
514	RTMemTmpFree(pszFilename);
515	if (RT_FAILURE(rc))
516	return rc;
517	}
518
519	/*
520	* Load additional device modules.
521	*/
522	PCFGMNODE pCur;
523	for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur))
524	{
525	/*
526	* Get the name and path.
527	*/
528	char szName[PDMMOD_NAME_LEN];
529	rc = CFGMR3GetName(pCur, &szName[0], sizeof(szName));
530	if (rc == VERR_CFGM_NOT_ENOUGH_SPACE)
531	{
532	AssertMsgFailed(("configuration error: The module name is too long, cchName=%zu.\n", CFGMR3GetNameLen(pCur)));
533	return VERR_PDM_MODULE_NAME_TOO_LONG;
534	}
535	else if (RT_FAILURE(rc))
536	{
537	AssertMsgFailed(("CFGMR3GetName -> %Rrc.\n", rc));
538	return rc;
539	}
540
541	/* the path is optional, if no path the module name + path is used. */
542	char szFilename[RTPATH_MAX];
543	rc = CFGMR3QueryString(pCur, "Path", &szFilename[0], sizeof(szFilename));
544	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
545	strcpy(szFilename, szName);
546	else if (RT_FAILURE(rc))
547	{
548	AssertMsgFailed(("configuration error: Failure to query the module path, rc=%Rrc.\n", rc));
549	return rc;
550	}
551
552	/* prepend path? */
553	if (!RTPathHavePath(szFilename))
554	{
555	char psz = pdmR3FileR3(szFilename, false /fShared*/);
556	if (!psz)
557	return VERR_NO_TMP_MEMORY;
558	size_t cch = strlen(psz) + 1;
559	if (cch > sizeof(szFilename))
560	{
561	RTMemTmpFree(psz);
562	AssertMsgFailed(("Filename too long! cch=%d '%s'\n", cch, psz));
563	return VERR_FILENAME_TOO_LONG;
564	}
565	memcpy(szFilename, psz, cch);
566	RTMemTmpFree(psz);
567	}
568
569	/*
570	* Load the module and register it's devices.
571	*/
572	RegCB.pCfgNode = pCur;
573	rc = pdmR3DevLoad(pVM, &RegCB, szFilename, szName);
574	if (RT_FAILURE(rc))
575	return rc;
576	}
577
578	return VINF_SUCCESS;
579	}
580
581
582	/**
583	* Loads one device module and call the registration entry point.
584	*
585	* @returns VBox status code.
586	* @param pVM Pointer to the VM.
587	* @param pRegCB The registration callback stuff.
588	* @param pszFilename Module filename.
589	* @param pszName Module name.
590	*/
591	static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char pszFilename, const char pszName)
592	{
593	/*
594	* Load it.
595	*/
596	int rc = pdmR3LoadR3U(pVM->pUVM, pszFilename, pszName);
597	if (RT_SUCCESS(rc))
598	{
599	/*
600	* Get the registration export and call it.
601	*/
602	FNPDMVBOXDEVICESREGISTER *pfnVBoxDevicesRegister;
603	rc = PDMR3LdrGetSymbolR3(pVM, pszName, "VBoxDevicesRegister", (void **)&pfnVBoxDevicesRegister);
604	if (RT_SUCCESS(rc))
605	{
606	Log(("PDM: Calling VBoxDevicesRegister (%p) of %s (%s)\n", pfnVBoxDevicesRegister, pszName, pszFilename));
607	rc = pfnVBoxDevicesRegister(&pRegCB->Core, VBOX_VERSION);
608	if (RT_SUCCESS(rc))
609	Log(("PDM: Successfully loaded device module %s (%s).\n", pszName, pszFilename));
610	else
611	AssertMsgFailed(("VBoxDevicesRegister failed with rc=%Rrc for module %s (%s)\n", rc, pszName, pszFilename));
612	}
613	else
614	{
615	AssertMsgFailed(("Failed to locate 'VBoxDevicesRegister' in %s (%s) rc=%Rrc\n", pszName, pszFilename, rc));
616	if (rc == VERR_SYMBOL_NOT_FOUND)
617	rc = VERR_PDM_NO_REGISTRATION_EXPORT;
618	}
619	}
620	else
621	AssertMsgFailed(("Failed to load %s %s!\n", pszFilename, pszName));
622	return rc;
623	}
624
625
626	/**
627	* @interface_method_impl{PDMDEVREGCB,pfnRegister}
628	*/
629	static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pReg)
630	{
631	/*
632	* Validate the registration structure.
633	*/
634	Assert(pReg);
635	AssertMsgReturn(pReg->u32Version == PDM_DEVREG_VERSION,
636	("Unknown struct version %#x!\n", pReg->u32Version),
637	VERR_PDM_UNKNOWN_DEVREG_VERSION);
638
639	AssertMsgReturn( pReg->szName[0]
640	&& strlen(pReg->szName) < sizeof(pReg->szName)
641	&& pdmR3IsValidName(pReg->szName),
642	("Invalid name '%.s'\n", sizeof(pReg->szName), pReg->szName),
643	VERR_PDM_INVALID_DEVICE_REGISTRATION);
644	AssertMsgReturn( !(pReg->fFlags & PDM_DEVREG_FLAGS_RC)
645	\|\| ( pReg->szRCMod[0]
646	&& strlen(pReg->szRCMod) < sizeof(pReg->szRCMod)),
647	("Invalid GC module name '%s' - (Device %s)\n", pReg->szRCMod, pReg->szName),
648	VERR_PDM_INVALID_DEVICE_REGISTRATION);
649	AssertMsgReturn( !(pReg->fFlags & PDM_DEVREG_FLAGS_R0)
650	\|\| ( pReg->szR0Mod[0]
651	&& strlen(pReg->szR0Mod) < sizeof(pReg->szR0Mod)),
652	("Invalid R0 module name '%s' - (Device %s)\n", pReg->szR0Mod, pReg->szName),
653	VERR_PDM_INVALID_DEVICE_REGISTRATION);
654	AssertMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_HOST_BITS_MASK) == PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT,
655	("Invalid host bits flags! fFlags=%#x (Device %s)\n", pReg->fFlags, pReg->szName),
656	VERR_PDM_INVALID_DEVICE_HOST_BITS);
657	AssertMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_MASK),
658	("Invalid guest bits flags! fFlags=%#x (Device %s)\n", pReg->fFlags, pReg->szName),
659	VERR_PDM_INVALID_DEVICE_REGISTRATION);
660	AssertMsgReturn(pReg->fClass,
661	("No class! (Device %s)\n", pReg->szName),
662	VERR_PDM_INVALID_DEVICE_REGISTRATION);
663	AssertMsgReturn(pReg->cMaxInstances > 0,
664	("Max instances %u! (Device %s)\n", pReg->cMaxInstances, pReg->szName),
665	VERR_PDM_INVALID_DEVICE_REGISTRATION);
666	AssertMsgReturn(pReg->cbInstance <= (uint32_t)(pReg->fFlags & (PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0) ? 96 * _1K : _1M),
667	("Instance size %d bytes! (Device %s)\n", pReg->cbInstance, pReg->szName),
668	VERR_PDM_INVALID_DEVICE_REGISTRATION);
669	AssertMsgReturn(pReg->pfnConstruct,
670	("No constructor! (Device %s)\n", pReg->szName),
671	VERR_PDM_INVALID_DEVICE_REGISTRATION);
672	AssertLogRelMsgReturn((pReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_MASK) == PDM_DEVREG_FLAGS_GUEST_BITS_DEFAULT,
673	("PDM: Rejected device '%s' because it didn't match the guest bits.\n", pReg->szName),
674	VERR_PDM_INVALID_DEVICE_GUEST_BITS);
675	AssertLogRelMsg(pReg->u32VersionEnd == PDM_DEVREG_VERSION,
676	("u32VersionEnd=%#x, expected %#x. (szName=%s)\n",
677	pReg->u32VersionEnd, PDM_DEVREG_VERSION, pReg->szName));
678
679	/*
680	* Check for duplicate and find FIFO entry at the same time.
681	*/
682	PCPDMDEVREGCBINT pRegCB = (PCPDMDEVREGCBINT)pCallbacks;
683	PPDMDEV pDevPrev = NULL;
684	PPDMDEV pDev = pRegCB->pVM->pdm.s.pDevs;
685	for (; pDev; pDevPrev = pDev, pDev = pDev->pNext)
686	AssertMsgReturn(strcmp(pDev->pReg->szName, pReg->szName),
687	("Device '%s' already exists\n", pReg->szName),
688	VERR_PDM_DEVICE_NAME_CLASH);
689
690	/*
691	* Allocate new device structure, initialize and insert it into the list.
692	*/
693	int rc;
694	pDev = (PPDMDEV)MMR3HeapAlloc(pRegCB->pVM, MM_TAG_PDM_DEVICE, sizeof(*pDev));
695	if (pDev)
696	{
697	pDev->pNext = NULL;
698	pDev->cInstances = 0;
699	pDev->pInstances = NULL;
700	pDev->pReg = pReg;
701	pDev->cchName = (uint32_t)strlen(pReg->szName);
702	rc = CFGMR3QueryStringAllocDef( pRegCB->pCfgNode, "RCSearchPath", &pDev->pszRCSearchPath, NULL);
703	if (RT_SUCCESS(rc))
704	rc = CFGMR3QueryStringAllocDef(pRegCB->pCfgNode, "R0SearchPath", &pDev->pszR0SearchPath, NULL);
705	if (RT_SUCCESS(rc))
706	{
707	if (pDevPrev)
708	pDevPrev->pNext = pDev;
709	else
710	pRegCB->pVM->pdm.s.pDevs = pDev;
711	Log(("PDM: Registered device '%s'\n", pReg->szName));
712	return VINF_SUCCESS;
713	}
714
715	MMR3HeapFree(pDev);
716	}
717	else
718	rc = VERR_NO_MEMORY;
719	return rc;
720	}
721
722
723	/**
724	* Locates a LUN.
725	*
726	* @returns VBox status code.
727	* @param pVM Pointer to the VM.
728	* @param pszDevice Device name.
729	* @param iInstance Device instance.
730	* @param iLun The Logical Unit to obtain the interface of.
731	* @param ppLun Where to store the pointer to the LUN if found.
732	* @thread Try only do this in EMT...
733	*/
734	int pdmR3DevFindLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPPDMLUN ppLun)
735	{
736	/*
737	* Iterate registered devices looking for the device.
738	*/
739	size_t cchDevice = strlen(pszDevice);
740	for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext)
741	{
742	if ( pDev->cchName == cchDevice
743	&& !memcmp(pDev->pReg->szName, pszDevice, cchDevice))
744	{
745	/*
746	* Iterate device instances.
747	*/
748	for (PPDMDEVINS pDevIns = pDev->pInstances; pDevIns; pDevIns = pDevIns->Internal.s.pPerDeviceNextR3)
749	{
750	if (pDevIns->iInstance == iInstance)
751	{
752	/*
753	* Iterate luns.
754	*/
755	for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
756	{
757	if (pLun->iLun == iLun)
758	{
759	*ppLun = pLun;
760	return VINF_SUCCESS;
761	}
762	}
763	return VERR_PDM_LUN_NOT_FOUND;
764	}
765	}
766	return VERR_PDM_DEVICE_INSTANCE_NOT_FOUND;
767	}
768	}
769	return VERR_PDM_DEVICE_NOT_FOUND;
770	}
771
772
773	/**
774	* Attaches a preconfigured driver to an existing device instance.
775	*
776	* This is used to change drivers and suchlike at runtime.
777	*
778	* @returns VBox status code.
779	* @param pUVM The user mode VM handle.
780	* @param pszDevice Device name.
781	* @param iInstance Device instance.
782	* @param iLun The Logical Unit to obtain the interface of.
783	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
784	* @param ppBase Where to store the base interface pointer. Optional.
785	* @thread EMT
786	*/
787	VMMR3DECL(int) PDMR3DeviceAttach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags, PPPDMIBASE ppBase)
788	{
789	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
790	PVM pVM = pUVM->pVM;
791	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
792	VM_ASSERT_EMT(pVM);
793	LogFlow(("PDMR3DeviceAttach: pszDevice=%p:{%s} iInstance=%d iLun=%d fFlags=%#x ppBase=%p\n",
794	pszDevice, pszDevice, iInstance, iLun, fFlags, ppBase));
795
796	/*
797	* Find the LUN in question.
798	*/
799	PPDMLUN pLun;
800	int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
801	if (RT_SUCCESS(rc))
802	{
803	/*
804	* Can we attach anything at runtime?
805	*/
806	PPDMDEVINS pDevIns = pLun->pDevIns;
807	if (pDevIns->pReg->pfnAttach)
808	{
809	if (!pLun->pTop)
810	{
811	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
812	rc = pDevIns->pReg->pfnAttach(pDevIns, iLun, fFlags);
813	PDMCritSectLeave(pDevIns->pCritSectRoR3);
814	}
815	else
816	rc = VERR_PDM_DRIVER_ALREADY_ATTACHED;
817	}
818	else
819	rc = VERR_PDM_DEVICE_NO_RT_ATTACH;
820
821	if (ppBase)
822	*ppBase = pLun->pTop ? &pLun->pTop->IBase : NULL;
823	}
824	else if (ppBase)
825	*ppBase = NULL;
826
827	if (ppBase)
828	LogFlow(("PDMR3DeviceAttach: returns %Rrc ppBase=%p\n", rc, ppBase));
829	else
830	LogFlow(("PDMR3DeviceAttach: returns %Rrc\n", rc));
831	return rc;
832	}
833
834
835	/**
836	* Detaches a driver chain from an existing device instance.
837	*
838	* This is used to change drivers and suchlike at runtime.
839	*
840	* @returns VBox status code.
841	* @param pUVM The user mode VM handle.
842	* @param pszDevice Device name.
843	* @param iInstance Device instance.
844	* @param iLun The Logical Unit to obtain the interface of.
845	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
846	* @thread EMT
847	*/
848	VMMR3DECL(int) PDMR3DeviceDetach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags)
849	{
850	return PDMR3DriverDetach(pUVM, pszDevice, iInstance, iLun, NULL, 0, fFlags);
851	}
852
853
854	/**
855	* References the critical section associated with a device for the use by a
856	* timer or similar created by the device.
857	*
858	* @returns Pointer to the critical section.
859	* @param pVM Pointer to the VM.
860	* @param pDevIns The device instance in question.
861	*
862	* @internal
863	*/
864	VMMR3_INT_DECL(PPDMCRITSECT) PDMR3DevGetCritSect(PVM pVM, PPDMDEVINS pDevIns)
865	{
866	VM_ASSERT_EMT(pVM);
867	VM_ASSERT_STATE(pVM, VMSTATE_CREATING);
868	AssertPtr(pDevIns);
869
870	PPDMCRITSECT pCritSect = pDevIns->pCritSectRoR3;
871	AssertPtr(pCritSect);
872	pCritSect->s.fUsedByTimerOrSimilar = true;
873
874	return pCritSect;
875	}
876
877
878	/**
879	* Attaches a preconfigured driver to an existing device or driver instance.
880	*
881	* This is used to change drivers and suchlike at runtime. The driver or device
882	* at the end of the chain will be told to attach to whatever is configured
883	* below it.
884	*
885	* @returns VBox status code.
886	* @param pUVM The user mode VM handle.
887	* @param pszDevice Device name.
888	* @param iInstance Device instance.
889	* @param iLun The Logical Unit to obtain the interface of.
890	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
891	* @param ppBase Where to store the base interface pointer. Optional.
892	*
893	* @thread EMT
894	*/
895	VMMR3DECL(int) PDMR3DriverAttach(PUVM pUVM, const char *pszDevice, unsigned iInstance, unsigned iLun, uint32_t fFlags, PPPDMIBASE ppBase)
896	{
897	LogFlow(("PDMR3DriverAttach: pszDevice=%p:{%s} iInstance=%d iLun=%d fFlags=%#x ppBase=%p\n",
898	pszDevice, pszDevice, iInstance, iLun, fFlags, ppBase));
899	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
900	PVM pVM = pUVM->pVM;
901	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
902	VM_ASSERT_EMT(pVM);
903
904	if (ppBase)
905	*ppBase = NULL;
906
907	/*
908	* Find the LUN in question.
909	*/
910	PPDMLUN pLun;
911	int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
912	if (RT_SUCCESS(rc))
913	{
914	/*
915	* Anything attached to the LUN?
916	*/
917	PPDMDRVINS pDrvIns = pLun->pTop;
918	if (!pDrvIns)
919	{
920	/* No, ask the device to attach to the new stuff. */
921	PPDMDEVINS pDevIns = pLun->pDevIns;
922	if (pDevIns->pReg->pfnAttach)
923	{
924	PDMCritSectEnter(pDevIns->pCritSectRoR3, VERR_IGNORED);
925	rc = pDevIns->pReg->pfnAttach(pDevIns, iLun, fFlags);
926	if (RT_SUCCESS(rc) && ppBase)
927	*ppBase = pLun->pTop ? &pLun->pTop->IBase : NULL;
928	PDMCritSectLeave(pDevIns->pCritSectRoR3);
929	}
930	else
931	rc = VERR_PDM_DEVICE_NO_RT_ATTACH;
932	}
933	else
934	{
935	/* Yes, find the bottom most driver and ask it to attach to the new stuff. */
936	while (pDrvIns->Internal.s.pDown)
937	pDrvIns = pDrvIns->Internal.s.pDown;
938	if (pDrvIns->pReg->pfnAttach)
939	{
940	rc = pDrvIns->pReg->pfnAttach(pDrvIns, fFlags);
941	if (RT_SUCCESS(rc) && ppBase)
942	*ppBase = pDrvIns->Internal.s.pDown
943	? &pDrvIns->Internal.s.pDown->IBase
944	: NULL;
945	}
946	else
947	rc = VERR_PDM_DRIVER_NO_RT_ATTACH;
948	}
949	}
950
951	if (ppBase)
952	LogFlow(("PDMR3DriverAttach: returns %Rrc ppBase=%p\n", rc, ppBase));
953	else
954	LogFlow(("PDMR3DriverAttach: returns %Rrc\n", rc));
955	return rc;
956	}
957
958
959	/**
960	* Detaches the specified driver instance.
961	*
962	* This is used to replumb drivers at runtime for simulating hot plugging and
963	* media changes.
964	*
965	* This is a superset of PDMR3DeviceDetach. It allows detaching drivers from
966	* any driver or device by specifying the driver to start detaching at. The
967	* only prerequisite is that the driver or device above implements the
968	* pfnDetach callback (PDMDRVREG / PDMDEVREG).
969	*
970	* @returns VBox status code.
971	* @param pUVM The user mode VM handle.
972	* @param pszDevice Device name.
973	* @param iDevIns Device instance.
974	* @param iLun The Logical Unit in which to look for the driver.
975	* @param pszDriver The name of the driver which to detach. If NULL
976	* then the entire driver chain is detatched.
977	* @param iOccurance The occurrence of that driver in the chain. This is
978	* usually 0.
979	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
980	* @thread EMT
981	*/
982	VMMR3DECL(int) PDMR3DriverDetach(PUVM pUVM, const char *pszDevice, unsigned iDevIns, unsigned iLun,
983	const char *pszDriver, unsigned iOccurance, uint32_t fFlags)
984	{
985	LogFlow(("PDMR3DriverDetach: pszDevice=%p:{%s} iDevIns=%u iLun=%u pszDriver=%p:{%s} iOccurance=%u fFlags=%#x\n",
986	pszDevice, pszDevice, iDevIns, iLun, pszDriver, iOccurance, fFlags));
987	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
988	PVM pVM = pUVM->pVM;
989	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
990	VM_ASSERT_EMT(pVM);
991	AssertPtr(pszDevice);
992	AssertPtrNull(pszDriver);
993	Assert(iOccurance == 0 \|\| pszDriver);
994	Assert(!(fFlags & ~(PDM_TACH_FLAGS_NOT_HOT_PLUG)));
995
996	/*
997	* Find the LUN in question.
998	*/
999	PPDMLUN pLun;
1000	int rc = pdmR3DevFindLun(pVM, pszDevice, iDevIns, iLun, &pLun);
1001	if (RT_SUCCESS(rc))
1002	{
1003	/*
1004	* Locate the driver.
1005	*/
1006	PPDMDRVINS pDrvIns = pLun->pTop;
1007	if (pDrvIns)
1008	{
1009	if (pszDriver)
1010	{
1011	while (pDrvIns)
1012	{
1013	if (!strcmp(pDrvIns->pReg->szName, pszDriver))
1014	{
1015	if (iOccurance == 0)
1016	break;
1017	iOccurance--;
1018	}
1019	pDrvIns = pDrvIns->Internal.s.pDown;
1020	}
1021	}
1022	if (pDrvIns)
1023	rc = pdmR3DrvDetach(pDrvIns, fFlags);
1024	else
1025	rc = VERR_PDM_DRIVER_INSTANCE_NOT_FOUND;
1026	}
1027	else
1028	rc = VINF_PDM_NO_DRIVER_ATTACHED_TO_LUN;
1029	}
1030
1031	LogFlow(("PDMR3DriverDetach: returns %Rrc\n", rc));
1032	return rc;
1033	}
1034
1035
1036	/**
1037	* Runtime detach and reattach of a new driver chain or sub chain.
1038	*
1039	* This is intended to be called on a non-EMT thread, this will instantiate the
1040	* new driver (sub-)chain, and then the EMTs will do the actual replumbing. The
1041	* destruction of the old driver chain will be taken care of on the calling
1042	* thread.
1043	*
1044	* @returns VBox status code.
1045	* @param pUVM The user mode VM handle.
1046	* @param pszDevice Device name.
1047	* @param iDevIns Device instance.
1048	* @param iLun The Logical Unit in which to look for the driver.
1049	* @param pszDriver The name of the driver which to detach and replace.
1050	* If NULL then the entire driver chain is to be
1051	* reattached.
1052	* @param iOccurance The occurrence of that driver in the chain. This is
1053	* usually 0.
1054	* @param fFlags Flags, combination of the PDMDEVATT_FLAGS_* \#defines.
1055	* @param pCfg The configuration of the new driver chain that is
1056	* going to be attached. The subtree starts with the
1057	* node containing a Driver key, a Config subtree and
1058	* optionally an AttachedDriver subtree.
1059	* If this parameter is NULL, then this call will work
1060	* like at a non-pause version of PDMR3DriverDetach.
1061	* @param ppBase Where to store the base interface pointer to the new
1062	* driver. Optional.
1063	*
1064	* @thread Any thread. The EMTs will be involved at some point though.
1065	*/
1066	VMMR3DECL(int) PDMR3DriverReattach(PUVM pUVM, const char *pszDevice, unsigned iDevIns, unsigned iLun,
1067	const char *pszDriver, unsigned iOccurance, uint32_t fFlags,
1068	PCFGMNODE pCfg, PPPDMIBASE ppBase)
1069	{
1070	NOREF(pUVM); NOREF(pszDevice); NOREF(iDevIns); NOREF(iLun); NOREF(pszDriver); NOREF(iOccurance);
1071	NOREF(fFlags); NOREF(pCfg); NOREF(ppBase);
1072	return VERR_NOT_IMPLEMENTED;
1073	}
1074

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source: vbox/trunk/src/VBox/VMM/VMMR3/PDMDevice.cpp@ 45103

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