/* $Id: PDMDevice.cpp 14299 2008-11-18 13:25:40Z vboxsync $ */ /** @file * PDM - Pluggable Device and Driver Manager, Device parts. */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_PDM_DEVICE #include "PDMInternal.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Structures and Typedefs * *******************************************************************************/ /** * Internal callback structure pointer. * The main purpose is to define the extra data we associate * with PDMDEVREGCB so we can find the VM instance and so on. */ typedef struct PDMDEVREGCBINT { /** The callback structure. */ PDMDEVREGCB Core; /** A bit of padding. */ uint32_t u32[4]; /** VM Handle. */ PVM pVM; } PDMDEVREGCBINT; /** Pointer to a PDMDEVREGCBINT structure. */ typedef PDMDEVREGCBINT *PPDMDEVREGCBINT; /** Pointer to a const PDMDEVREGCBINT structure. */ typedef const PDMDEVREGCBINT *PCPDMDEVREGCBINT; /******************************************************************************* * Internal Functions * *******************************************************************************/ static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pDevReg); static DECLCALLBACK(void *) pdmR3DevReg_MMHeapAlloc(PPDMDEVREGCB pCallbacks, size_t cb); static int pdmR3DevLoadModules(PVM pVM); static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char *pszFilename, const char *pszName); /** * This function will initialize the devices for this VM instance. * * * First of all this mean loading the builtin device and letting them * register themselves. Beyond that any additional device modules are * loaded and called for registration. * * Then the device configuration is enumerated, the instantiation order * is determined, and finally they are instantiated. * * After all devices have been successfully instantiated the primary * PCI Bus device is called to emulate the PCI BIOS, i.e. making the * resource assignments. If there is no PCI device, this step is of course * skipped. * * Finally the init completion routines of the instantiated devices * are called. * * @returns VBox status code. * @param pVM VM Handle. */ int pdmR3DevInit(PVM pVM) { LogFlow(("pdmR3DevInit:\n")); AssertRelease(!(RT_OFFSETOF(PDMDEVINS, achInstanceData) & 15)); AssertRelease(sizeof(pVM->pdm.s.pDevInstances->Internal.s) <= sizeof(pVM->pdm.s.pDevInstances->Internal.padding)); /* * Load device modules. */ int rc = pdmR3DevLoadModules(pVM); if (RT_FAILURE(rc)) return rc; #ifdef VBOX_WITH_USB /* ditto for USB Devices. */ rc = pdmR3UsbLoadModules(pVM); if (RT_FAILURE(rc)) return rc; #endif /* * Get the RC & R0 devhlps and create the devhlp R3 task queue. */ PCPDMDEVHLPRC pDevHlpRC; rc = PDMR3LdrGetSymbolRC(pVM, NULL, "g_pdmRCDevHlp", &pDevHlpRC); AssertReleaseRCReturn(rc, rc); PCPDMDEVHLPR0 pDevHlpR0; rc = PDMR3LdrGetSymbolR0(pVM, NULL, "g_pdmR0DevHlp", &pDevHlpR0); AssertReleaseRCReturn(rc, rc); rc = PDMR3QueueCreateInternal(pVM, sizeof(PDMDEVHLPTASK), 8, 0, pdmR3DevHlpQueueConsumer, true, &pVM->pdm.s.pDevHlpQueueR3); AssertRCReturn(rc, rc); pVM->pdm.s.pDevHlpQueueR0 = PDMQueueR0Ptr(pVM->pdm.s.pDevHlpQueueR3); pVM->pdm.s.pDevHlpQueueRC = PDMQueueRCPtr(pVM->pdm.s.pDevHlpQueueR3); /* * * Enumerate the device instance configurations * and come up with a instantiation order. * */ /* Switch to /Devices, which contains the device instantiations. */ PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "Devices"); /* * Count the device instances. */ PCFGMNODE pCur; PCFGMNODE pInstanceNode; unsigned cDevs = 0; for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur)) for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode)) cDevs++; if (!cDevs) { Log(("PDM: No devices were configured!\n")); return VINF_SUCCESS; } Log2(("PDM: cDevs=%d!\n", cDevs)); /* * Collect info on each device instance. */ struct DEVORDER { /** Configuration node. */ PCFGMNODE pNode; /** Pointer to device. */ PPDMDEV pDev; /** Init order. */ uint32_t u32Order; /** VBox instance number. */ uint32_t iInstance; } *paDevs = (struct DEVORDER *)alloca(sizeof(paDevs[0]) * (cDevs + 1)); /* (One extra for swapping) */ Assert(paDevs); unsigned i = 0; for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur)) { /* Get the device name. */ char szName[sizeof(paDevs[0].pDev->pDevReg->szDeviceName)]; rc = CFGMR3GetName(pCur, szName, sizeof(szName)); AssertMsgRCReturn(rc, ("Configuration error: device name is too long (or something)! rc=%Rrc\n", rc), rc); /* Find the device. */ PPDMDEV pDev = pdmR3DevLookup(pVM, szName); AssertMsgReturn(pDev, ("Configuration error: device '%s' not found!\n", szName), VERR_PDM_DEVICE_NOT_FOUND); /* Configured priority or use default based on device class? */ uint32_t u32Order; rc = CFGMR3QueryU32(pCur, "Priority", &u32Order); if (rc == VERR_CFGM_VALUE_NOT_FOUND) { uint32_t u32 = pDev->pDevReg->fClass; for (u32Order = 1; !(u32 & u32Order); u32Order <<= 1) /* nop */; } else AssertMsgRCReturn(rc, ("Configuration error: reading \"Priority\" for the '%s' device failed rc=%Rrc!\n", szName, rc), rc); /* Enumerate the device instances. */ for (pInstanceNode = CFGMR3GetFirstChild(pCur); pInstanceNode; pInstanceNode = CFGMR3GetNextChild(pInstanceNode)) { paDevs[i].pNode = pInstanceNode; paDevs[i].pDev = pDev; paDevs[i].u32Order = u32Order; /* Get the instance number. */ char szInstance[32]; rc = CFGMR3GetName(pInstanceNode, szInstance, sizeof(szInstance)); AssertMsgRCReturn(rc, ("Configuration error: instance name is too long (or something)! rc=%Rrc\n", rc), rc); char *pszNext = NULL; rc = RTStrToUInt32Ex(szInstance, &pszNext, 0, &paDevs[i].iInstance); AssertMsgRCReturn(rc, ("Configuration error: RTStrToInt32Ex failed on the instance name '%s'! rc=%Rrc\n", szInstance, rc), rc); AssertMsgReturn(!*pszNext, ("Configuration error: the instance name '%s' isn't all digits. (%s)\n", szInstance, pszNext), VERR_INVALID_PARAMETER); /* next instance */ i++; } } /* devices */ Assert(i == cDevs); /* * Sort the device array ascending on u32Order. (bubble) */ unsigned c = cDevs - 1; while (c) { unsigned j = 0; for (i = 0; i < c; i++) if (paDevs[i].u32Order > paDevs[i + 1].u32Order) { paDevs[cDevs] = paDevs[i + 1]; paDevs[i + 1] = paDevs[i]; paDevs[i] = paDevs[cDevs]; j = i; } c = j; } /* * * Instantiate the devices. * */ for (i = 0; i < cDevs; i++) { /* * Gather a bit of config. */ /* trusted */ bool fTrusted; rc = CFGMR3QueryBool(paDevs[i].pNode, "Trusted", &fTrusted); if (rc == VERR_CFGM_VALUE_NOT_FOUND) fTrusted = false; else if (RT_FAILURE(rc)) { AssertMsgFailed(("configuration error: failed to query boolean \"Trusted\", rc=%Rrc\n", rc)); return rc; } /* config node */ PCFGMNODE pConfigNode = CFGMR3GetChild(paDevs[i].pNode, "Config"); if (!pConfigNode) { rc = CFGMR3InsertNode(paDevs[i].pNode, "Config", &pConfigNode); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed to create Config node! rc=%Rrc\n", rc)); return rc; } } CFGMR3SetRestrictedRoot(pConfigNode); /* * Allocate the device instance. */ size_t cb = RT_OFFSETOF(PDMDEVINS, achInstanceData[paDevs[i].pDev->pDevReg->cbInstance]); cb = RT_ALIGN_Z(cb, 16); PPDMDEVINS pDevIns; if (paDevs[i].pDev->pDevReg->fFlags & (PDM_DEVREG_FLAGS_RC | PDM_DEVREG_FLAGS_R0)) rc = MMR3HyperAllocOnceNoRel(pVM, cb, 0, MM_TAG_PDM_DEVICE, (void **)&pDevIns); else rc = MMR3HeapAllocZEx(pVM, MM_TAG_PDM_DEVICE, cb, (void **)&pDevIns); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed to allocate %d bytes of instance data for device '%s'. rc=%Rrc\n", cb, paDevs[i].pDev->pDevReg->szDeviceName, rc)); return rc; } /* * Initialize it. */ pDevIns->u32Version = PDM_DEVINS_VERSION; //pDevIns->Internal.s.pNextR3 = NULL; //pDevIns->Internal.s.pPerDeviceNextR3 = NULL; pDevIns->Internal.s.pDevR3 = paDevs[i].pDev; pDevIns->Internal.s.pVMR3 = pVM; pDevIns->Internal.s.pVMR0 = pVM->pVMR0; pDevIns->Internal.s.pVMRC = pVM->pVMRC; //pDevIns->Internal.s.pLunsR3 = NULL; pDevIns->Internal.s.pCfgHandle = paDevs[i].pNode; //pDevIns->Internal.s.pPciDeviceR3 = NULL; //pDevIns->Internal.s.pPciBusR3 = NULL; //pDevIns->Internal.s.pPciDeviceR0 = 0; //pDevIns->Internal.s.pPciBusR0 = 0; //pDevIns->Internal.s.pPciDeviceRC = 0; //pDevIns->Internal.s.pPciBusRC = 0; pDevIns->pDevHlpR3 = fTrusted ? &g_pdmR3DevHlpTrusted : &g_pdmR3DevHlpUnTrusted; pDevIns->pDevHlpRC = pDevHlpRC; pDevIns->pDevHlpR0 = pDevHlpR0; pDevIns->pDevReg = paDevs[i].pDev->pDevReg; pDevIns->pCfgHandle = pConfigNode; pDevIns->iInstance = paDevs[i].iInstance; pDevIns->pvInstanceDataR3 = &pDevIns->achInstanceData[0]; pDevIns->pvInstanceDataRC = pDevIns->pDevReg->fFlags & PDM_DEVREG_FLAGS_RC ? MMHyperR3ToRC(pVM, pDevIns->pvInstanceDataR3) : NIL_RTRCPTR; pDevIns->pvInstanceDataR0 = pDevIns->pDevReg->fFlags & PDM_DEVREG_FLAGS_R0 ? MMHyperR3ToR0(pVM, pDevIns->pvInstanceDataR3) : NIL_RTR0PTR; /* * Link it into all the lists. */ /* The global instance FIFO. */ PPDMDEVINS pPrev1 = pVM->pdm.s.pDevInstances; if (!pPrev1) pVM->pdm.s.pDevInstances = pDevIns; else { while (pPrev1->Internal.s.pNextR3) pPrev1 = pPrev1->Internal.s.pNextR3; pPrev1->Internal.s.pNextR3 = pDevIns; } /* The per device instance FIFO. */ PPDMDEVINS pPrev2 = paDevs[i].pDev->pInstances; if (!pPrev2) paDevs[i].pDev->pInstances = pDevIns; else { while (pPrev2->Internal.s.pPerDeviceNextR3) pPrev2 = pPrev2->Internal.s.pPerDeviceNextR3; pPrev2->Internal.s.pPerDeviceNextR3 = pDevIns; } /* * Call the constructor. */ Log(("PDM: Constructing device '%s' instance %d...\n", pDevIns->pDevReg->szDeviceName, pDevIns->iInstance)); rc = pDevIns->pDevReg->pfnConstruct(pDevIns, pDevIns->iInstance, pDevIns->pCfgHandle); if (RT_FAILURE(rc)) { LogRel(("PDM: Failed to construct '%s'/%d! %Rra\n", pDevIns->pDevReg->szDeviceName, pDevIns->iInstance, rc)); /* because we're damn lazy right now, we'll say that the destructor will be called even if the constructor fails. */ return rc; } } /* for device instances */ #ifdef VBOX_WITH_USB /* ditto for USB Devices. */ rc = pdmR3UsbInstantiateDevices(pVM); if (RT_FAILURE(rc)) return rc; #endif /* * * PCI BIOS Fake and Init Complete. * */ if (pVM->pdm.s.aPciBuses[0].pDevInsR3) { pdmLock(pVM); rc = pVM->pdm.s.aPciBuses[0].pfnFakePCIBIOSR3(pVM->pdm.s.aPciBuses[0].pDevInsR3); pdmUnlock(pVM); if (RT_FAILURE(rc)) { AssertMsgFailed(("PCI BIOS fake failed rc=%Rrc\n", rc)); return rc; } } for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3) { if (pDevIns->pDevReg->pfnInitComplete) { rc = pDevIns->pDevReg->pfnInitComplete(pDevIns); if (RT_FAILURE(rc)) { AssertMsgFailed(("InitComplete on device '%s'/%d failed with rc=%Rrc\n", pDevIns->pDevReg->szDeviceName, pDevIns->iInstance, rc)); return rc; } } } #ifdef VBOX_WITH_USB /* ditto for USB Devices. */ rc = pdmR3UsbVMInitComplete(pVM); if (RT_FAILURE(rc)) return rc; #endif LogFlow(("pdmR3DevInit: returns %Rrc\n", VINF_SUCCESS)); return VINF_SUCCESS; } /** * Lookups a device structure by name. * @internal */ PPDMDEV pdmR3DevLookup(PVM pVM, const char *pszName) { size_t cchName = strlen(pszName); for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext) if ( pDev->cchName == cchName && !strcmp(pDev->pDevReg->szDeviceName, pszName)) return pDev; return NULL; } /** * Loads the device modules. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. */ static int pdmR3DevLoadModules(PVM pVM) { /* * Initialize the callback structure. */ PDMDEVREGCBINT RegCB; RegCB.Core.u32Version = PDM_DEVREG_CB_VERSION; RegCB.Core.pfnRegister = pdmR3DevReg_Register; RegCB.Core.pfnMMHeapAlloc = pdmR3DevReg_MMHeapAlloc; RegCB.pVM = pVM; /* * Load the builtin module */ PCFGMNODE pDevicesNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "PDM/Devices"); bool fLoadBuiltin; int rc = CFGMR3QueryBool(pDevicesNode, "LoadBuiltin", &fLoadBuiltin); if (rc == VERR_CFGM_VALUE_NOT_FOUND || rc == VERR_CFGM_NO_PARENT) fLoadBuiltin = true; else if (RT_FAILURE(rc)) { AssertMsgFailed(("Configuration error: Querying boolean \"LoadBuiltin\" failed with %Rrc\n", rc)); return rc; } if (fLoadBuiltin) { /* make filename */ char *pszFilename = pdmR3FileR3("VBoxDD", /* fShared = */ true); if (!pszFilename) return VERR_NO_TMP_MEMORY; rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD"); RTMemTmpFree(pszFilename); if (RT_FAILURE(rc)) return rc; /* make filename */ pszFilename = pdmR3FileR3("VBoxDD2", /* fShared = */ true); if (!pszFilename) return VERR_NO_TMP_MEMORY; rc = pdmR3DevLoad(pVM, &RegCB, pszFilename, "VBoxDD2"); RTMemTmpFree(pszFilename); if (RT_FAILURE(rc)) return rc; } /* * Load additional device modules. */ PCFGMNODE pCur; for (pCur = CFGMR3GetFirstChild(pDevicesNode); pCur; pCur = CFGMR3GetNextChild(pCur)) { /* * Get the name and path. */ char szName[PDMMOD_NAME_LEN]; rc = CFGMR3GetName(pCur, &szName[0], sizeof(szName)); if (rc == VERR_CFGM_NOT_ENOUGH_SPACE) { AssertMsgFailed(("configuration error: The module name is too long, cchName=%zu.\n", CFGMR3GetNameLen(pCur))); return VERR_PDM_MODULE_NAME_TOO_LONG; } else if (RT_FAILURE(rc)) { AssertMsgFailed(("CFGMR3GetName -> %Rrc.\n", rc)); return rc; } /* the path is optional, if no path the module name + path is used. */ char szFilename[RTPATH_MAX]; rc = CFGMR3QueryString(pCur, "Path", &szFilename[0], sizeof(szFilename)); if (rc == VERR_CFGM_VALUE_NOT_FOUND) strcpy(szFilename, szName); else if (RT_FAILURE(rc)) { AssertMsgFailed(("configuration error: Failure to query the module path, rc=%Rrc.\n", rc)); return rc; } /* prepend path? */ if (!RTPathHavePath(szFilename)) { char *psz = pdmR3FileR3(szFilename); if (!psz) return VERR_NO_TMP_MEMORY; size_t cch = strlen(psz) + 1; if (cch > sizeof(szFilename)) { RTMemTmpFree(psz); AssertMsgFailed(("Filename too long! cch=%d '%s'\n", cch, psz)); return VERR_FILENAME_TOO_LONG; } memcpy(szFilename, psz, cch); RTMemTmpFree(psz); } /* * Load the module and register it's devices. */ rc = pdmR3DevLoad(pVM, &RegCB, szFilename, szName); if (RT_FAILURE(rc)) return rc; } return VINF_SUCCESS; } /** * Loads one device module and call the registration entry point. * * @returns VBox status code. * @param pVM VM handle. * @param pRegCB The registration callback stuff. * @param pszFilename Module filename. * @param pszName Module name. */ static int pdmR3DevLoad(PVM pVM, PPDMDEVREGCBINT pRegCB, const char *pszFilename, const char *pszName) { /* * Load it. */ int rc = pdmR3LoadR3U(pVM->pUVM, pszFilename, pszName); if (RT_SUCCESS(rc)) { /* * Get the registration export and call it. */ FNPDMVBOXDEVICESREGISTER *pfnVBoxDevicesRegister; rc = PDMR3LdrGetSymbolR3(pVM, pszName, "VBoxDevicesRegister", (void **)&pfnVBoxDevicesRegister); if (RT_SUCCESS(rc)) { Log(("PDM: Calling VBoxDevicesRegister (%p) of %s (%s)\n", pfnVBoxDevicesRegister, pszName, pszFilename)); rc = pfnVBoxDevicesRegister(&pRegCB->Core, VBOX_VERSION); if (RT_SUCCESS(rc)) Log(("PDM: Successfully loaded device module %s (%s).\n", pszName, pszFilename)); else AssertMsgFailed(("VBoxDevicesRegister failed with rc=%Rrc for module %s (%s)\n", rc, pszName, pszFilename)); } else { AssertMsgFailed(("Failed to locate 'VBoxDevicesRegister' in %s (%s) rc=%Rrc\n", pszName, pszFilename, rc)); if (rc == VERR_SYMBOL_NOT_FOUND) rc = VERR_PDM_NO_REGISTRATION_EXPORT; } } else AssertMsgFailed(("Failed to load %s %s!\n", pszFilename, pszName)); return rc; } /** * Registers a device with the current VM instance. * * @returns VBox status code. * @param pCallbacks Pointer to the callback table. * @param pDevReg Pointer to the device registration record. * This data must be permanent and readonly. */ static DECLCALLBACK(int) pdmR3DevReg_Register(PPDMDEVREGCB pCallbacks, PCPDMDEVREG pDevReg) { /* * Validate the registration structure. */ Assert(pDevReg); if (pDevReg->u32Version != PDM_DEVREG_VERSION) { AssertMsgFailed(("Unknown struct version %#x!\n", pDevReg->u32Version)); return VERR_PDM_UNKNOWN_DEVREG_VERSION; } if ( !pDevReg->szDeviceName[0] || strlen(pDevReg->szDeviceName) >= sizeof(pDevReg->szDeviceName)) { AssertMsgFailed(("Invalid name '%s'\n", pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if ( (pDevReg->fFlags & PDM_DEVREG_FLAGS_RC) && ( !pDevReg->szRCMod[0] || strlen(pDevReg->szRCMod) >= sizeof(pDevReg->szRCMod))) { AssertMsgFailed(("Invalid GC module name '%s' - (Device %s)\n", pDevReg->szRCMod, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if ( (pDevReg->fFlags & PDM_DEVREG_FLAGS_R0) && ( !pDevReg->szR0Mod[0] || strlen(pDevReg->szR0Mod) >= sizeof(pDevReg->szR0Mod))) { AssertMsgFailed(("Invalid R0 module name '%s' - (Device %s)\n", pDevReg->szR0Mod, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if ((pDevReg->fFlags & PDM_DEVREG_FLAGS_HOST_BITS_MASK) != PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT) { AssertMsgFailed(("Invalid host bits flags! fFlags=%#x (Device %s)\n", pDevReg->fFlags, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_HOST_BITS; } if (!(pDevReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_MASK)) { AssertMsgFailed(("Invalid guest bits flags! fFlags=%#x (Device %s)\n", pDevReg->fFlags, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if (!pDevReg->fClass) { AssertMsgFailed(("No class! (Device %s)\n", pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if (pDevReg->cMaxInstances <= 0) { AssertMsgFailed(("Max instances %u! (Device %s)\n", pDevReg->cMaxInstances, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if (pDevReg->cbInstance > (RTUINT)(pDevReg->fFlags & (PDM_DEVREG_FLAGS_RC | PDM_DEVREG_FLAGS_R0) ? 96 * _1K : _1M)) { AssertMsgFailed(("Instance size %d bytes! (Device %s)\n", pDevReg->cbInstance, pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } if (!pDevReg->pfnConstruct) { AssertMsgFailed(("No constructore! (Device %s)\n", pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_REGISTRATION; } /* Check matching guest bits last without any asserting. Enables trial and error registration. */ if (!(pDevReg->fFlags & PDM_DEVREG_FLAGS_GUEST_BITS_DEFAULT)) { Log(("PDM: Rejected device '%s' because it didn't match the guest bits.\n", pDevReg->szDeviceName)); return VERR_PDM_INVALID_DEVICE_GUEST_BITS; } AssertLogRelMsg(pDevReg->u32VersionEnd == PDM_DEVREG_VERSION, ("u32VersionEnd=%#x, expected %#x. (szDeviceName=%s)\n", pDevReg->u32VersionEnd, PDM_DEVREG_VERSION, pDevReg->szDeviceName)); /* * Check for duplicate and find FIFO entry at the same time. */ PCPDMDEVREGCBINT pRegCB = (PCPDMDEVREGCBINT)pCallbacks; PPDMDEV pDevPrev = NULL; PPDMDEV pDev = pRegCB->pVM->pdm.s.pDevs; for (; pDev; pDevPrev = pDev, pDev = pDev->pNext) { if (!strcmp(pDev->pDevReg->szDeviceName, pDevReg->szDeviceName)) { AssertMsgFailed(("Device '%s' already exists\n", pDevReg->szDeviceName)); return VERR_PDM_DEVICE_NAME_CLASH; } } /* * Allocate new device structure and insert it into the list. */ pDev = (PPDMDEV)MMR3HeapAlloc(pRegCB->pVM, MM_TAG_PDM_DEVICE, sizeof(*pDev)); if (pDev) { pDev->pNext = NULL; pDev->cInstances = 0; pDev->pInstances = NULL; pDev->pDevReg = pDevReg; pDev->cchName = (uint32_t)strlen(pDevReg->szDeviceName); if (pDevPrev) pDevPrev->pNext = pDev; else pRegCB->pVM->pdm.s.pDevs = pDev; Log(("PDM: Registered device '%s'\n", pDevReg->szDeviceName)); return VINF_SUCCESS; } return VERR_NO_MEMORY; } /** * Allocate memory which is associated with current VM instance * and automatically freed on it's destruction. * * @returns Pointer to allocated memory. The memory is *NOT* zero-ed. * @param pCallbacks Pointer to the callback table. * @param cb Number of bytes to allocate. */ static DECLCALLBACK(void *) pdmR3DevReg_MMHeapAlloc(PPDMDEVREGCB pCallbacks, size_t cb) { Assert(pCallbacks); Assert(pCallbacks->u32Version == PDM_DEVREG_CB_VERSION); void *pv = MMR3HeapAlloc(((PPDMDEVREGCBINT)pCallbacks)->pVM, MM_TAG_PDM_DEVICE_USER, cb); LogFlow(("pdmR3DevReg_MMHeapAlloc(,%#zx): returns %p\n", cb, pv)); return pv; } /** * Locates a LUN. * * @returns VBox status code. * @param pVM VM Handle. * @param pszDevice Device name. * @param iInstance Device instance. * @param iLun The Logical Unit to obtain the interface of. * @param ppLun Where to store the pointer to the LUN if found. * @thread Try only do this in EMT... */ int pdmR3DevFindLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPDMLUN *ppLun) { /* * Iterate registered devices looking for the device. */ size_t cchDevice = strlen(pszDevice); for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext) { if ( pDev->cchName == cchDevice && !memcmp(pDev->pDevReg->szDeviceName, pszDevice, cchDevice)) { /* * Iterate device instances. */ for (PPDMDEVINS pDevIns = pDev->pInstances; pDevIns; pDevIns = pDevIns->Internal.s.pPerDeviceNextR3) { if (pDevIns->iInstance == iInstance) { /* * Iterate luns. */ for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext) { if (pLun->iLun == iLun) { *ppLun = pLun; return VINF_SUCCESS; } } return VERR_PDM_LUN_NOT_FOUND; } } return VERR_PDM_DEVICE_INSTANCE_NOT_FOUND; } } return VERR_PDM_DEVICE_NOT_FOUND; } /** * Attaches a preconfigured driver to an existing device instance. * * This is used to change drivers and suchlike at runtime. * * @returns VBox status code. * @param pVM VM Handle. * @param pszDevice Device name. * @param iInstance Device instance. * @param iLun The Logical Unit to obtain the interface of. * @param ppBase Where to store the base interface pointer. Optional. * @thread EMT */ VMMR3DECL(int) PDMR3DeviceAttach(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPDMIBASE *ppBase) { VM_ASSERT_EMT(pVM); LogFlow(("PDMR3DeviceAttach: pszDevice=%p:{%s} iInstance=%d iLun=%d ppBase=%p\n", pszDevice, pszDevice, iInstance, iLun, ppBase)); /* * Find the LUN in question. */ PPDMLUN pLun; int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun); if (RT_SUCCESS(rc)) { /* * Can we attach anything at runtime? */ PPDMDEVINS pDevIns = pLun->pDevIns; if (pDevIns->pDevReg->pfnAttach) { if (!pLun->pTop) { rc = pDevIns->pDevReg->pfnAttach(pDevIns, iLun); } else rc = VERR_PDM_DRIVER_ALREADY_ATTACHED; } else rc = VERR_PDM_DEVICE_NO_RT_ATTACH; if (ppBase) *ppBase = pLun->pTop ? &pLun->pTop->IBase : NULL; } else if (ppBase) *ppBase = NULL; if (ppBase) LogFlow(("PDMR3DeviceAttach: returns %Rrc *ppBase=%p\n", rc, *ppBase)); else LogFlow(("PDMR3DeviceAttach: returns %Rrc\n", rc)); return rc; } /** * Detaches a driver chain from an existing device instance. * * This is used to change drivers and suchlike at runtime. * * @returns VBox status code. * @param pVM VM Handle. * @param pszDevice Device name. * @param iInstance Device instance. * @param iLun The Logical Unit to obtain the interface of. * @thread EMT */ VMMR3DECL(int) PDMR3DeviceDetach(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun) { VM_ASSERT_EMT(pVM); LogFlow(("PDMR3DeviceDetach: pszDevice=%p:{%s} iInstance=%d iLun=%d\n", pszDevice, pszDevice, iInstance, iLun)); /* * Find the LUN in question. */ PPDMLUN pLun; int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun); if (RT_SUCCESS(rc)) { /* * Can we detach anything at runtime? */ PPDMDEVINS pDevIns = pLun->pDevIns; if (pDevIns->pDevReg->pfnDetach) { if (pLun->pTop) rc = pdmR3DrvDetach(pLun->pTop); else rc = VINF_PDM_NO_DRIVER_ATTACHED_TO_LUN; } else rc = VERR_PDM_DEVICE_NO_RT_DETACH; } LogFlow(("PDMR3DeviceDetach: returns %Rrc\n", rc)); return rc; }