/* $Id: DrvKeyboardQueue.cpp 89831 2021-06-22 13:09:19Z vboxsync $ */ /** @file * VBox input devices: Keyboard queue driver */ /* * Copyright (C) 2006-2020 Oracle Corporation * * 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. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_DRV_KBD_QUEUE #include #include #include #include "VBoxDD.h" /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Keyboard usage page bits to be OR-ed into the code. */ #define HID_PG_KB_BITS 0x070000 /********************************************************************************************************************************* * Structures and Typedefs * *********************************************************************************************************************************/ /** Scancode translator state. */ typedef enum { SS_IDLE, /**< Starting state. */ SS_EXT, /**< E0 byte was received. */ SS_EXT1 /**< E1 byte was received. */ } scan_state_t; /** * Keyboard queue driver instance data. * * @implements PDMIKEYBOARDCONNECTOR * @implements PDMIKEYBOARDPORT */ typedef struct DRVKBDQUEUE { /** Pointer to the driver instance structure. */ PPDMDRVINS pDrvIns; /** Pointer to the keyboard port interface of the driver/device above us. */ PPDMIKEYBOARDPORT pUpPort; /** Pointer to the keyboard port interface of the driver/device below us. */ PPDMIKEYBOARDCONNECTOR pDownConnector; /** Our keyboard connector interface. */ PDMIKEYBOARDCONNECTOR IConnector; /** Our keyboard port interface. */ PDMIKEYBOARDPORT IPort; /** The queue handle. */ PPDMQUEUE pQueue; /** State of the scancode translation. */ scan_state_t XlatState; /** Discard input when this flag is set. */ bool fInactive; /** When VM is suspended, queue full errors are not fatal. */ bool fSuspended; } DRVKBDQUEUE, *PDRVKBDQUEUE; /** * Keyboard queue item. */ typedef struct DRVKBDQUEUEITEM { /** The core part owned by the queue manager. */ PDMQUEUEITEMCORE Core; /** The keycode. */ uint32_t idUsage; } DRVKBDQUEUEITEM, *PDRVKBDQUEUEITEM; /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** Lookup table for converting PC/XT scan codes to USB HID usage codes. */ static const uint8_t aScancode2Hid[] = { 0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, /* 00-07 */ 0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b, /* 08-1F */ 0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, /* 10-17 */ 0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16, /* 18-1F */ 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33, /* 20-27 */ 0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19, /* 28-2F */ 0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55, /* 30-37 */ 0xe2, 0x2c, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, /* 38-3F */ 0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f, /* 40-47 */ 0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59, /* 48-4F */ 0x5a, 0x5b, 0x62, 0x63, 0x46, 0x00, 0x64, 0x44, /* 50-57 */ 0x45, 0x67, 0x00, 0x00, 0x8c, 0x00, 0x00, 0x00, /* 58-5F */ 0x00, 0x00, 0x00, 0x00, 0x68, 0x69, 0x6a, 0x6b, /* 60-67 */ 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x00, /* 68-6F */ 0x88, 0x91, 0x90, 0x87, 0x00, 0x00, 0x00, 0x00, /* 70-77 */ 0x00, 0x8a, 0x00, 0x8b, 0x00, 0x89, 0x85, 0x00 /* 78-7F */ }; /** Lookup table for extended scancodes (arrow keys etc.). */ static const uint8_t aExtScan2Hid[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00-07 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 08-1F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10-17 */ 0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00, /* 18-1F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 20-27 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 28-2F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46, /* 30-37 */ /* Sun-specific keys. Most of the XT codes are made up */ 0xe6, 0x00, 0x00, 0x75, 0x76, 0x77, 0xA3, 0x78, /* 38-3F */ 0x80, 0x81, 0x82, 0x79, 0x00, 0x00, 0x48, 0x4a, /* 40-47 */ 0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d, /* 48-4F */ 0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00, /* 50-57 */ 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65, 0x66, 0x00, /* 58-5F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60-67 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 68-6F */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70-77 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* 78-7F */ }; /** * Convert a PC scan code to a USB HID usage byte. * * @param state Current state of the translator (scan_state_t). * @param scanCode Incoming scan code. * @param pUsage Pointer to usage; high bit set for key up events. The * contents are only valid if returned state is SS_IDLE. * * @return scan_state_t New state of the translator. */ static scan_state_t ScancodeToHidUsage(scan_state_t state, uint8_t scanCode, uint32_t *pUsage) { uint32_t keyUp; uint8_t usage; Assert(pUsage); /* Isolate the scan code and key break flag. */ keyUp = (scanCode & 0x80) << 24; switch (state) { case SS_IDLE: if (scanCode == 0xE0) { state = SS_EXT; } else if (scanCode == 0xE1) { state = SS_EXT1; } else { usage = aScancode2Hid[scanCode & 0x7F]; *pUsage = usage | keyUp | HID_PG_KB_BITS; /* Remain in SS_IDLE state. */ } break; case SS_EXT: usage = aExtScan2Hid[scanCode & 0x7F]; *pUsage = usage | keyUp | HID_PG_KB_BITS; state = SS_IDLE; break; case SS_EXT1: /* The sequence is E1 1D 45 E1 9D C5. We take the easy way out and remain * in the SS_EXT1 state until 45 or C5 is received. */ if ((scanCode & 0x7F) == 0x45) { *pUsage = 0x48 | HID_PG_KB_BITS; if (scanCode == 0xC5) *pUsage |= keyUp; state = SS_IDLE; } /* Else remain in SS_EXT1 state. */ break; } return state; } /* -=-=-=-=- IBase -=-=-=-=- */ /** * @interface_method_impl{PDMIBASE,pfnQueryInterface} */ static DECLCALLBACK(void *) drvKbdQueueQueryInterface(PPDMIBASE pInterface, const char *pszIID) { PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface); PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIKEYBOARDCONNECTOR, &pThis->IConnector); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIKEYBOARDPORT, &pThis->IPort); return NULL; } /* -=-=-=-=- IKeyboardPort -=-=-=-=- */ /** Converts a pointer to DRVKBDQUEUE::IPort to a DRVKBDQUEUE pointer. */ #define IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface) ( (PDRVKBDQUEUE)((char *)(pInterface) - RT_UOFFSETOF(DRVKBDQUEUE, IPort)) ) /** * @interface_method_impl{PDMIKEYBOARDPORT,pfnPutEventScan} * * Because of the event queueing the EMT context requirement is lifted. * @thread Any thread. */ static DECLCALLBACK(int) drvKbdQueuePutEventScan(PPDMIKEYBOARDPORT pInterface, uint8_t u8ScanCode) { PDRVKBDQUEUE pDrv = IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface); /* Ignore any attempt to send events if queue is inactive. */ if (pDrv->fInactive) return VINF_SUCCESS; uint32_t idUsage = 0; pDrv->XlatState = ScancodeToHidUsage(pDrv->XlatState, u8ScanCode, &idUsage); if (pDrv->XlatState == SS_IDLE) { PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue); if (pItem) { /* * Work around incredibly poorly desgined Korean keyboards which * only send break events for Hangul/Hanja keys -- convert a lone * key up into a key up/key down sequence. */ if (idUsage == UINT32_C(0x80000090) || idUsage == UINT32_C(0x80000091)) { PDRVKBDQUEUEITEM pItem2 = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue); /* * NB: If there's no room in the queue, we will drop the faked * key down event. Probably less bad than the alternatives. */ if (pItem2) { /* Manufacture a key down event. */ pItem2->idUsage = idUsage & ~UINT32_C(0x80000000); PDMQueueInsert(pDrv->pQueue, &pItem2->Core); } } pItem->idUsage = idUsage; PDMQueueInsert(pDrv->pQueue, &pItem->Core); return VINF_SUCCESS; } if (!pDrv->fSuspended) AssertMsgFailed(("drvKbdQueuePutEventScan: Queue is full!!!!\n")); return VERR_PDM_NO_QUEUE_ITEMS; } else return VINF_SUCCESS; } /** * @interface_method_impl{PDMIKEYBOARDPORT,pfnPutEventHid} * * Because of the event queueing the EMT context requirement is lifted. * @thread Any thread. */ static DECLCALLBACK(int) drvKbdQueuePutEventHid(PPDMIKEYBOARDPORT pInterface, uint32_t idUsage) { PDRVKBDQUEUE pDrv = IKEYBOARDPORT_2_DRVKBDQUEUE(pInterface); /* Ignore any attempt to send events if queue is inactive. */ if (pDrv->fInactive) return VINF_SUCCESS; PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)PDMQueueAlloc(pDrv->pQueue); if (pItem) { pItem->idUsage = idUsage; PDMQueueInsert(pDrv->pQueue, &pItem->Core); return VINF_SUCCESS; } if (!pDrv->fSuspended) AssertMsgFailed(("drvKbdQueuePutEventHid: Queue is full!!!!\n")); return VERR_PDM_NO_QUEUE_ITEMS; } /* -=-=-=-=- IConnector -=-=-=-=- */ #define PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface) ( (PDRVKBDQUEUE)((char *)(pInterface) - RT_UOFFSETOF(DRVKBDQUEUE, IConnector)) ) /** * Pass LED status changes from the guest thru to the frontend driver. * * @param pInterface Pointer to the keyboard connector interface structure. * @param enmLeds The new LED mask. */ static DECLCALLBACK(void) drvKbdPassThruLedsChange(PPDMIKEYBOARDCONNECTOR pInterface, PDMKEYBLEDS enmLeds) { PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface); pDrv->pDownConnector->pfnLedStatusChange(pDrv->pDownConnector, enmLeds); } /** * Pass keyboard state changes from the guest thru to the frontend driver. * * @param pInterface Pointer to the keyboard connector interface structure. * @param fActive The new active/inactive state. */ static DECLCALLBACK(void) drvKbdPassThruSetActive(PPDMIKEYBOARDCONNECTOR pInterface, bool fActive) { PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface); AssertPtr(pDrv->pDownConnector->pfnSetActive); pDrv->pDownConnector->pfnSetActive(pDrv->pDownConnector, fActive); } /** * Flush the keyboard queue if there are pending events. * * @param pInterface Pointer to the keyboard connector interface structure. */ static DECLCALLBACK(void) drvKbdFlushQueue(PPDMIKEYBOARDCONNECTOR pInterface) { PDRVKBDQUEUE pDrv = PPDMIKEYBOARDCONNECTOR_2_DRVKBDQUEUE(pInterface); AssertPtr(pDrv->pQueue); PDMQueueFlushIfNecessary(pDrv->pQueue); } /* -=-=-=-=- queue -=-=-=-=- */ /** * Queue callback for processing a queued item. * * @returns Success indicator. * If false the item will not be removed and the flushing will stop. * @param pDrvIns The driver instance. * @param pItemCore Pointer to the queue item to process. */ static DECLCALLBACK(bool) drvKbdQueueConsumer(PPDMDRVINS pDrvIns, PPDMQUEUEITEMCORE pItemCore) { PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); PDRVKBDQUEUEITEM pItem = (PDRVKBDQUEUEITEM)pItemCore; int rc = pThis->pUpPort->pfnPutEventHid(pThis->pUpPort, pItem->idUsage); return rc != VERR_TRY_AGAIN; } /* -=-=-=-=- driver interface -=-=-=-=- */ /** * Power On notification. * * @returns VBox status code. * @param pDrvIns The drive instance data. */ static DECLCALLBACK(void) drvKbdQueuePowerOn(PPDMDRVINS pDrvIns) { PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); pThis->fInactive = false; } /** * Reset notification. * * @returns VBox status code. * @param pDrvIns The drive instance data. */ static DECLCALLBACK(void) drvKbdQueueReset(PPDMDRVINS pDrvIns) { //PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); /** @todo purge the queue on reset. */ RT_NOREF(pDrvIns); } /** * Suspend notification. * * @returns VBox status code. * @param pDrvIns The drive instance data. */ static DECLCALLBACK(void) drvKbdQueueSuspend(PPDMDRVINS pDrvIns) { PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); pThis->fSuspended = true; } /** * Resume notification. * * @returns VBox status code. * @param pDrvIns The drive instance data. */ static DECLCALLBACK(void) drvKbdQueueResume(PPDMDRVINS pDrvIns) { PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); pThis->fInactive = false; pThis->fSuspended = false; } /** * Power Off notification. * * @param pDrvIns The drive instance data. */ static DECLCALLBACK(void) drvKbdQueuePowerOff(PPDMDRVINS pDrvIns) { PDRVKBDQUEUE pThis = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); pThis->fInactive = true; } /** * Construct a keyboard driver instance. * * @copydoc FNPDMDRVCONSTRUCT */ static DECLCALLBACK(int) drvKbdQueueConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) { PDRVKBDQUEUE pDrv = PDMINS_2_DATA(pDrvIns, PDRVKBDQUEUE); LogFlow(("drvKbdQueueConstruct: iInstance=%d\n", pDrvIns->iInstance)); PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); /* * Validate configuration. */ if (!CFGMR3AreValuesValid(pCfg, "QueueSize\0Interval\0")) return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES; /* * Init basic data members and interfaces. */ pDrv->fInactive = true; pDrv->fSuspended = false; pDrv->XlatState = SS_IDLE; /* IBase. */ pDrvIns->IBase.pfnQueryInterface = drvKbdQueueQueryInterface; /* IKeyboardConnector. */ pDrv->IConnector.pfnLedStatusChange = drvKbdPassThruLedsChange; pDrv->IConnector.pfnSetActive = drvKbdPassThruSetActive; pDrv->IConnector.pfnFlushQueue = drvKbdFlushQueue; /* IKeyboardPort. */ pDrv->IPort.pfnPutEventScan = drvKbdQueuePutEventScan; pDrv->IPort.pfnPutEventHid = drvKbdQueuePutEventHid; /* * Get the IKeyboardPort interface of the above driver/device. */ pDrv->pUpPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIKEYBOARDPORT); if (!pDrv->pUpPort) { AssertMsgFailed(("Configuration error: No keyboard port interface above!\n")); return VERR_PDM_MISSING_INTERFACE_ABOVE; } /* * Attach driver below and query it's connector interface. */ PPDMIBASE pDownBase; int rc = PDMDrvHlpAttach(pDrvIns, fFlags, &pDownBase); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed to attach driver below us! rc=%Rra\n", rc)); return rc; } pDrv->pDownConnector = PDMIBASE_QUERY_INTERFACE(pDownBase, PDMIKEYBOARDCONNECTOR); if (!pDrv->pDownConnector) { AssertMsgFailed(("Configuration error: No keyboard connector interface below!\n")); return VERR_PDM_MISSING_INTERFACE_BELOW; } /* * Create the queue. */ uint32_t cMilliesInterval = 0; rc = CFGMR3QueryU32(pCfg, "Interval", &cMilliesInterval); if (rc == VERR_CFGM_VALUE_NOT_FOUND) cMilliesInterval = 0; else if (RT_FAILURE(rc)) { AssertMsgFailed(("Configuration error: 32-bit \"Interval\" -> rc=%Rrc\n", rc)); return rc; } uint32_t cItems = 0; rc = CFGMR3QueryU32(pCfg, "QueueSize", &cItems); if (rc == VERR_CFGM_VALUE_NOT_FOUND) cItems = 128; else if (RT_FAILURE(rc)) { AssertMsgFailed(("Configuration error: 32-bit \"QueueSize\" -> rc=%Rrc\n", rc)); return rc; } rc = PDMDrvHlpQueueCreate(pDrvIns, sizeof(DRVKBDQUEUEITEM), cItems, cMilliesInterval, drvKbdQueueConsumer, "Keyboard", &pDrv->pQueue); if (RT_FAILURE(rc)) { AssertMsgFailed(("Failed to create driver: cItems=%d cMilliesInterval=%d rc=%Rrc\n", cItems, cMilliesInterval, rc)); return rc; } return VINF_SUCCESS; } /** * Keyboard queue driver registration record. */ const PDMDRVREG g_DrvKeyboardQueue = { /* u32Version */ PDM_DRVREG_VERSION, /* szName */ "KeyboardQueue", /* szRCMod */ "", /* szR0Mod */ "", /* pszDescription */ "Keyboard queue driver to plug in between the key source and the device to do queueing and inter-thread transport.", /* fFlags */ PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT, /* fClass. */ PDM_DRVREG_CLASS_KEYBOARD, /* cMaxInstances */ ~0U, /* cbInstance */ sizeof(DRVKBDQUEUE), /* pfnConstruct */ drvKbdQueueConstruct, /* pfnRelocate */ NULL, /* pfnDestruct */ NULL, /* pfnIOCtl */ NULL, /* pfnPowerOn */ drvKbdQueuePowerOn, /* pfnReset */ drvKbdQueueReset, /* pfnSuspend */ drvKbdQueueSuspend, /* pfnResume */ drvKbdQueueResume, /* pfnAttach */ NULL, /* pfnDetach */ NULL, /* pfnPowerOff */ drvKbdQueuePowerOff, /* pfnSoftReset */ NULL, /* u32EndVersion */ PDM_DRVREG_VERSION };