VUSBInternal.h@ 78097

Last change on this file since 78097 was 77000, checked in by vboxsync, 6 years ago
Devices/USB: Create the USB I/O thread for each device during the attach phase (as it was destructed during a detach) to fix a debug assertion when saving a VM state where the device gets reattached during the process
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 22.8 KB

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1	/* $Id: VUSBInternal.h 77000 2019-01-26 10:30:14Z vboxsync $ */
2	/** @file
3	* Virtual USB - Internal header.
4	*
5	* This subsystem implements USB devices in a host controller independent
6	* way. All the host controller code has to do is use VUSBHUB for its
7	* root hub implementation and any emulated USB device may be plugged into
8	* the virtual bus.
9	*/
10
11	/*
12	* Copyright (C) 2006-2019 Oracle Corporation
13	*
14	* This file is part of VirtualBox Open Source Edition (OSE), as
15	* available from http://www.virtualbox.org. This file is free software;
16	* you can redistribute it and/or modify it under the terms of the GNU
17	* General Public License (GPL) as published by the Free Software
18	* Foundation, in version 2 as it comes in the "COPYING" file of the
19	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
20	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
21	*/
22
23	#ifndef VBOX_INCLUDED_SRC_USB_VUSBInternal_h
24	#define VBOX_INCLUDED_SRC_USB_VUSBInternal_h
25	#ifndef RT_WITHOUT_PRAGMA_ONCE
26	# pragma once
27	#endif
28
29	#include <VBox/cdefs.h>
30	#include <VBox/types.h>
31	#include <VBox/vusb.h>
32	#include <VBox/vmm/stam.h>
33	#include <VBox/vmm/pdm.h>
34	#include <VBox/vmm/vmapi.h>
35	#include <VBox/vmm/pdmusb.h>
36	#include <iprt/asm.h>
37	#include <iprt/assert.h>
38	#include <iprt/req.h>
39	#include <iprt/asm.h>
40	#include <iprt/list.h>
41
42	#include "VUSBSniffer.h"
43
44	RT_C_DECLS_BEGIN
45
46
47	/** @name Internal Device Operations, Structures and Constants.
48	* @{
49	*/
50
51	/** Pointer to a Virtual USB device (core). */
52	typedef struct VUSBDEV *PVUSBDEV;
53	/** Pointer to a VUSB hub device. */
54	typedef struct VUSBHUB *PVUSBHUB;
55	/** Pointer to a VUSB root hub. */
56	typedef struct VUSBROOTHUB *PVUSBROOTHUB;
57
58
59	/** Number of the default control endpoint */
60	#define VUSB_PIPE_DEFAULT 0
61
62	/** @name Device addresses
63	* @{ */
64	#define VUSB_DEFAULT_ADDRESS 0
65	#define VUSB_INVALID_ADDRESS UINT8_C(0xff)
66	/** @} */
67
68	/** @name Feature bits (1<<FEATURE for the u16Status bit)
69	* @{ */
70	#define VUSB_DEV_SELF_POWERED 0
71	#define VUSB_DEV_REMOTE_WAKEUP 1
72	#define VUSB_EP_HALT 0
73	/** @} */
74
75	/** Maximum number of endpoint addresses */
76	#define VUSB_PIPE_MAX 16
77
78	/**
79	* The VUSB URB data.
80	*/
81	typedef struct VUSBURBVUSBINT
82	{
83	/** Node for one of the lists the URB can be in. */
84	RTLISTNODE NdLst;
85	/** Pointer to the URB this structure is part of. */
86	PVUSBURB pUrb;
87	/** Pointer to the original for control messages. */
88	PVUSBURB pCtrlUrb;
89	/** Pointer to the VUSB device.
90	* This may be NULL if the destination address is invalid. */
91	PVUSBDEV pDev;
92	/** Specific to the pfnFree function. */
93	void *pvFreeCtx;
94	/**
95	* Callback which will free the URB once it's reaped and completed.
96	* @param pUrb The URB.
97	*/
98	DECLCALLBACKMEMBER(void, pfnFree)(PVUSBURB pUrb);
99	/** Submit timestamp. (logging only) */
100	uint64_t u64SubmitTS;
101	} VUSBURBVUSBINT;
102
103	/**
104	* Control-pipe stages.
105	*/
106	typedef enum CTLSTAGE
107	{
108	/** the control pipe is in the setup stage. */
109	CTLSTAGE_SETUP = 0,
110	/** the control pipe is in the data stage. */
111	CTLSTAGE_DATA,
112	/** the control pipe is in the status stage. */
113	CTLSTAGE_STATUS
114	} CTLSTAGE;
115
116	/**
117	* Extra data for a control pipe.
118	*
119	* This is state information needed for the special multi-stage
120	* transfers performed on this kind of pipes.
121	*/
122	typedef struct vusb_ctrl_extra
123	{
124	/** Current pipe stage. */
125	CTLSTAGE enmStage;
126	/** Success indicator. */
127	bool fOk;
128	/** Set if the message URB has been submitted. */
129	bool fSubmitted;
130	/** Pointer to the SETUP.
131	* This is a pointer to Urb->abData[0]. */
132	PVUSBSETUP pMsg;
133	/** Current DATA pointer.
134	* This starts at pMsg + 1 and is incremented at we read/write data. */
135	uint8_t *pbCur;
136	/** The amount of data left to read on IN operations.
137	* On OUT operations this is not used. */
138	uint32_t cbLeft;
139	/** The amount of data we can house.
140	* This starts at the default 8KB, and this structure will be reallocated to
141	* accommodate any larger request (unlikely). */
142	uint32_t cbMax;
143	/** The message URB. */
144	VUSBURB Urb;
145	} VUSBCTRLEXTRA, *PVUSBCTRLEXTRA;
146
147	void vusbMsgFreeExtraData(PVUSBCTRLEXTRA pExtra);
148	void vusbMsgResetExtraData(PVUSBCTRLEXTRA pExtra);
149
150	/**
151	* A VUSB pipe
152	*/
153	typedef struct vusb_pipe
154	{
155	PCVUSBDESCENDPOINTEX in;
156	PCVUSBDESCENDPOINTEX out;
157	/** Pointer to the extra state data required to run a control pipe. */
158	PVUSBCTRLEXTRA pCtrl;
159	/** Critical section serializing access to the extra state data for a control pipe. */
160	RTCRITSECT CritSectCtrl;
161	/** Count of active async transfers. */
162	volatile uint32_t async;
163	/** Last scheduled frame - only valid for isochronous IN endpoints. */
164	uint32_t uLastFrameIn;
165	/** Last scheduled frame - only valid for isochronous OUT endpoints. */
166	uint32_t uLastFrameOut;
167	} VUSBPIPE;
168	/** Pointer to a VUSB pipe structure. */
169	typedef VUSBPIPE *PVUSBPIPE;
170
171
172	/**
173	* Interface state and possible settings.
174	*/
175	typedef struct vusb_interface_state
176	{
177	/** Pointer to the interface descriptor of the currently selected (active)
178	* interface. */
179	PCVUSBDESCINTERFACEEX pCurIfDesc;
180	/** Pointer to the interface settings. */
181	PCVUSBINTERFACE pIf;
182	} VUSBINTERFACESTATE;
183	/** Pointer to interface state. */
184	typedef VUSBINTERFACESTATE *PVUSBINTERFACESTATE;
185	/** Pointer to const interface state. */
186	typedef const VUSBINTERFACESTATE *PCVUSBINTERFACESTATE;
187
188
189	/**
190	* VUSB URB pool.
191	*/
192	typedef struct VUSBURBPOOL
193	{
194	/** Critical section protecting the pool. */
195	RTCRITSECT CritSectPool;
196	/** Chain of free URBs by type. (Singly linked) */
197	RTLISTANCHOR aLstFreeUrbs[VUSBXFERTYPE_ELEMENTS];
198	/** The number of URBs in the pool. */
199	volatile uint32_t cUrbsInPool;
200	/** Align the size to a 8 byte boundary. */
201	uint32_t Alignment0;
202	} VUSBURBPOOL;
203	/** Pointer to a VUSB URB pool. */
204	typedef VUSBURBPOOL *PVUSBURBPOOL;
205
206	AssertCompileSizeAlignment(VUSBURBPOOL, 8);
207
208	/**
209	* A Virtual USB device (core).
210	*
211	* @implements VUSBIDEVICE
212	*/
213	typedef struct VUSBDEV
214	{
215	/** The device interface exposed to the HCI. */
216	VUSBIDEVICE IDevice;
217	/** Pointer to the PDM USB device instance. */
218	PPDMUSBINS pUsbIns;
219	/** Next device in the chain maintained by the roothub. */
220	PVUSBDEV pNext;
221	/** Pointer to the next device with the same address hash. */
222	PVUSBDEV pNextHash;
223	/** Pointer to the hub this device is attached to. */
224	PVUSBHUB pHub;
225	/** The device state. */
226	VUSBDEVICESTATE volatile enmState;
227	/** Reference counter to protect the device structure from going away. */
228	uint32_t volatile cRefs;
229
230	/** The device address. */
231	uint8_t u8Address;
232	/** The new device address. */
233	uint8_t u8NewAddress;
234	/** The port. */
235	int16_t i16Port;
236	/** Device status. (VUSB_DEV_SELF_POWERED or not.) */
237	uint16_t u16Status;
238
239	/** Pointer to the descriptor cache.
240	* (Provided by the device thru the pfnGetDescriptorCache method.) */
241	PCPDMUSBDESCCACHE pDescCache;
242	/** Current configuration. */
243	PCVUSBDESCCONFIGEX pCurCfgDesc;
244
245	/** Current interface state (including alternate interface setting) - maximum
246	* valid index is config->bNumInterfaces
247	*/
248	PVUSBINTERFACESTATE paIfStates;
249
250	/** Pipe/direction -> endpoint descriptor mapping */
251	VUSBPIPE aPipes[VUSB_PIPE_MAX];
252	/** Critical section protecting the active URB list. */
253	RTCRITSECT CritSectAsyncUrbs;
254	/** List of active async URBs. */
255	RTLISTANCHOR LstAsyncUrbs;
256
257	/** Dumper state. */
258	union VUSBDEVURBDUMPERSTATE
259	{
260	/** The current scsi command. */
261	uint8_t u8ScsiCmd;
262	} Urb;
263
264	/** The reset timer handle. */
265	PTMTIMER pResetTimer;
266	/** Reset handler arguments. */
267	void *pvArgs;
268	/** URB submit and reap thread. */
269	RTTHREAD hUrbIoThread;
270	/** Request queue for executing tasks on the I/O thread which should be done
271	* synchronous and without any other thread accessing the USB device. */
272	RTREQQUEUE hReqQueueSync;
273	/** Sniffer instance for this device if configured. */
274	VUSBSNIFFER hSniffer;
275	/** Flag whether the URB I/O thread should terminate. */
276	bool volatile fTerminate;
277	/** Flag whether the I/O thread was woken up. */
278	bool volatile fWokenUp;
279	#if HC_ARCH_BITS == 32
280	/** Align the size to a 8 byte boundary. */
281	bool afAlignment0[2];
282	#endif
283	/** The pool of free URBs for faster allocation. */
284	VUSBURBPOOL UrbPool;
285	} VUSBDEV;
286	AssertCompileSizeAlignment(VUSBDEV, 8);
287
288
289	int vusbDevInit(PVUSBDEV pDev, PPDMUSBINS pUsbIns, const char *pszCaptureFilename);
290	void vusbDevDestroy(PVUSBDEV pDev);
291
292	DECLINLINE(bool) vusbDevIsRh(PVUSBDEV pDev)
293	{
294	return (pDev->pHub == (PVUSBHUB)pDev);
295	}
296
297	bool vusbDevDoSelectConfig(PVUSBDEV dev, PCVUSBDESCCONFIGEX pCfg);
298	void vusbDevMapEndpoint(PVUSBDEV dev, PCVUSBDESCENDPOINTEX ep);
299	int vusbDevDetach(PVUSBDEV pDev);
300	int vusbDevAttach(PVUSBDEV pDev, PVUSBHUB pHub);
301	DECLINLINE(PVUSBROOTHUB) vusbDevGetRh(PVUSBDEV pDev);
302	size_t vusbDevMaxInterfaces(PVUSBDEV dev);
303
304	void vusbDevSetAddress(PVUSBDEV pDev, uint8_t u8Address);
305	bool vusbDevStandardRequest(PVUSBDEV pDev, int EndPt, PVUSBSETUP pSetup, void pvBuf, uint32_t pcbBuf);
306
307
308	/** @} */
309
310
311	/** @name Internal Hub Operations, Structures and Constants.
312	* @{
313	*/
314
315
316	/** Virtual method table for USB hub devices.
317	* Hub and roothub drivers need to implement these functions in addition to the
318	* vusb_dev_ops.
319	*/
320	typedef struct VUSBHUBOPS
321	{
322	int (*pfnAttach)(PVUSBHUB pHub, PVUSBDEV pDev);
323	void (*pfnDetach)(PVUSBHUB pHub, PVUSBDEV pDev);
324	} VUSBHUBOPS;
325	/** Pointer to a const HUB method table. */
326	typedef const VUSBHUBOPS *PCVUSBHUBOPS;
327
328	/** A VUSB Hub Device - Hub and roothub drivers need to use this struct
329	* @todo eliminate this (PDM / roothubs only).
330	*/
331	typedef struct VUSBHUB
332	{
333	VUSBDEV Dev;
334	PCVUSBHUBOPS pOps;
335	PVUSBROOTHUB pRootHub;
336	uint16_t cPorts;
337	uint16_t cDevices;
338	/** Name of the hub. Used for logging. */
339	char *pszName;
340	} VUSBHUB;
341	AssertCompileMemberAlignment(VUSBHUB, pOps, 8);
342	AssertCompileSizeAlignment(VUSBHUB, 8);
343
344	/** @} */
345
346
347	/** @name Internal Root Hub Operations, Structures and Constants.
348	* @{
349	*/
350
351	/**
352	* Per transfer type statistics.
353	*/
354	typedef struct VUSBROOTHUBTYPESTATS
355	{
356	STAMCOUNTER StatUrbsSubmitted;
357	STAMCOUNTER StatUrbsFailed;
358	STAMCOUNTER StatUrbsCancelled;
359
360	STAMCOUNTER StatReqBytes;
361	STAMCOUNTER StatReqReadBytes;
362	STAMCOUNTER StatReqWriteBytes;
363
364	STAMCOUNTER StatActBytes;
365	STAMCOUNTER StatActReadBytes;
366	STAMCOUNTER StatActWriteBytes;
367	} VUSBROOTHUBTYPESTATS, *PVUSBROOTHUBTYPESTATS;
368
369
370
371	/** The address hash table size. */
372	#define VUSB_ADDR_HASHSZ 5
373
374	/**
375	* The instance data of a root hub driver.
376	*
377	* This extends the generic VUSB hub.
378	*
379	* @implements VUSBIROOTHUBCONNECTOR
380	*/
381	typedef struct VUSBROOTHUB
382	{
383	/** The HUB.
384	* @todo remove this? */
385	VUSBHUB Hub;
386	/** Address hash table. */
387	PVUSBDEV apAddrHash[VUSB_ADDR_HASHSZ];
388	/** The default address. */
389	PVUSBDEV pDefaultAddress;
390
391	/** Pointer to the driver instance. */
392	PPDMDRVINS pDrvIns;
393	/** Pointer to the root hub port interface we're attached to. */
394	PVUSBIROOTHUBPORT pIRhPort;
395	/** Connector interface exposed upwards. */
396	VUSBIROOTHUBCONNECTOR IRhConnector;
397
398	/** Critical section protecting the device list. */
399	RTCRITSECT CritSectDevices;
400	/** Chain of devices attached to this hub. */
401	PVUSBDEV pDevices;
402
403	#if HC_ARCH_BITS == 32
404	uint32_t Alignment0;
405	#endif
406
407	/** Availability Bitmap. */
408	VUSBPORTBITMAP Bitmap;
409
410	/** Sniffer instance for the root hub. */
411	VUSBSNIFFER hSniffer;
412	/** Version of the attached Host Controller. */
413	uint32_t fHcVersions;
414	/** Size of the HCI specific data for each URB. */
415	size_t cbHci;
416	/** Size of the HCI specific TD. */
417	size_t cbHciTd;
418
419	/** The periodic frame processing thread. */
420	R3PTRTYPE(PPDMTHREAD) hThreadPeriodFrame;
421	/** Event semaphore to interact with the periodic frame processing thread. */
422	R3PTRTYPE(RTSEMEVENTMULTI) hSemEventPeriodFrame;
423	/** Event semaphore to release the thread waiting for the periodic frame processing thread to stop. */
424	R3PTRTYPE(RTSEMEVENTMULTI) hSemEventPeriodFrameStopped;
425	/** Current default frame rate for periodic frame processing thread. */
426	volatile uint32_t uFrameRateDefault;
427	/** Current frame rate (can be lower than the default frame rate if there is no activity). */
428	uint32_t uFrameRate;
429	/** How long to wait until the next frame. */
430	uint64_t nsWait;
431	/** Timestamp when the last frame was processed. */
432	uint64_t tsFrameProcessed;
433	/** Number of USB work cycles with no transfers. */
434	uint32_t cIdleCycles;
435
436	/** Flag whether a frame is currently being processed. */
437	volatile bool fFrameProcessing;
438
439	#if HC_ARCH_BITS == 32
440	uint32_t Alignment1;
441	#endif
442
443	#ifdef LOG_ENABLED
444	/** A serial number for URBs submitted on the roothub instance.
445	* Only logging builds. */
446	uint32_t iSerial;
447	/** Alignment */
448	uint32_t Alignment2;
449	#endif
450	#ifdef VBOX_WITH_STATISTICS
451	VUSBROOTHUBTYPESTATS Total;
452	VUSBROOTHUBTYPESTATS aTypes[VUSBXFERTYPE_MSG];
453	STAMCOUNTER StatIsocReqPkts;
454	STAMCOUNTER StatIsocReqReadPkts;
455	STAMCOUNTER StatIsocReqWritePkts;
456	STAMCOUNTER StatIsocActPkts;
457	STAMCOUNTER StatIsocActReadPkts;
458	STAMCOUNTER StatIsocActWritePkts;
459	struct
460	{
461	STAMCOUNTER Pkts;
462	STAMCOUNTER Ok;
463	STAMCOUNTER Ok0;
464	STAMCOUNTER DataUnderrun;
465	STAMCOUNTER DataUnderrun0;
466	STAMCOUNTER DataOverrun;
467	STAMCOUNTER NotAccessed;
468	STAMCOUNTER Misc;
469	STAMCOUNTER Bytes;
470	} aStatIsocDetails[8];
471
472	STAMPROFILE StatReapAsyncUrbs;
473	STAMPROFILE StatSubmitUrb;
474	STAMCOUNTER StatFramesProcessedClbk;
475	STAMCOUNTER StatFramesProcessedThread;
476	#endif
477	} VUSBROOTHUB;
478	AssertCompileMemberAlignment(VUSBROOTHUB, IRhConnector, 8);
479	AssertCompileMemberAlignment(VUSBROOTHUB, Bitmap, 8);
480	AssertCompileMemberAlignment(VUSBROOTHUB, CritSectDevices, 8);
481	#ifdef VBOX_WITH_STATISTICS
482	AssertCompileMemberAlignment(VUSBROOTHUB, Total, 8);
483	#endif
484
485	/** Converts a pointer to VUSBROOTHUB::IRhConnector to a PVUSBROOTHUB. */
486	#define VUSBIROOTHUBCONNECTOR_2_VUSBROOTHUB(pInterface) (PVUSBROOTHUB)( (uintptr_t)(pInterface) - RT_UOFFSETOF(VUSBROOTHUB, IRhConnector) )
487
488	/**
489	* URB cancellation modes
490	*/
491	typedef enum CANCELMODE
492	{
493	/** complete the URB with an error (CRC). */
494	CANCELMODE_FAIL = 0,
495	/** do not change the URB contents. */
496	CANCELMODE_UNDO
497	} CANCELMODE;
498
499	/* @} */
500
501
502
503	/** @name Internal URB Operations, Structures and Constants.
504	* @{ */
505	int vusbUrbSubmit(PVUSBURB pUrb);
506	void vusbUrbDoReapAsync(PRTLISTANCHOR pUrbLst, RTMSINTERVAL cMillies);
507	void vusbUrbDoReapAsyncDev(PVUSBDEV pDev, RTMSINTERVAL cMillies);
508	void vusbUrbCancel(PVUSBURB pUrb, CANCELMODE mode);
509	void vusbUrbCancelAsync(PVUSBURB pUrb, CANCELMODE mode);
510	void vusbUrbRipe(PVUSBURB pUrb);
511	void vusbUrbCompletionRh(PVUSBURB pUrb);
512	int vusbUrbSubmitHardError(PVUSBURB pUrb);
513	int vusbUrbErrorRh(PVUSBURB pUrb);
514	int vusbDevUrbIoThreadWakeup(PVUSBDEV pDev);
515	int vusbDevUrbIoThreadCreate(PVUSBDEV pDev);
516	int vusbDevUrbIoThreadDestroy(PVUSBDEV pDev);
517	DECLHIDDEN(void) vusbDevCancelAllUrbs(PVUSBDEV pDev, bool fDetaching);
518	DECLHIDDEN(int) vusbDevIoThreadExecV(PVUSBDEV pDev, uint32_t fFlags, PFNRT pfnFunction, unsigned cArgs, va_list Args);
519	DECLHIDDEN(int) vusbDevIoThreadExec(PVUSBDEV pDev, uint32_t fFlags, PFNRT pfnFunction, unsigned cArgs, ...);
520	DECLHIDDEN(int) vusbDevIoThreadExecSync(PVUSBDEV pDev, PFNRT pfnFunction, unsigned cArgs, ...);
521	DECLHIDDEN(int) vusbUrbCancelWorker(PVUSBURB pUrb, CANCELMODE enmMode);
522
523	DECLHIDDEN(uint64_t) vusbRhR3ProcessFrame(PVUSBROOTHUB pThis, bool fCallback);
524
525	int vusbUrbQueueAsyncRh(PVUSBURB pUrb);
526
527	/**
528	* Initializes the given URB pool.
529	*
530	* @returns VBox status code.
531	* @param pUrbPool The URB pool to initialize.
532	*/
533	DECLHIDDEN(int) vusbUrbPoolInit(PVUSBURBPOOL pUrbPool);
534
535	/**
536	* Destroy a given URB pool freeing all ressources.
537	*
538	* @returns nothing.
539	* @param pUrbPool The URB pool to destroy.
540	*/
541	DECLHIDDEN(void) vusbUrbPoolDestroy(PVUSBURBPOOL pUrbPool);
542
543	/**
544	* Allocate a new URB from the given URB pool.
545	*
546	* @returns Pointer to the new URB or NULL if out of memory.
547	* @param pUrbPool The URB pool to allocate from.
548	* @param enmType Type of the URB.
549	* @param enmDir The direction of the URB.
550	* @param cbData The number of bytes to allocate for the data buffer.
551	* @param cbHci Size of the data private to the HCI for each URB when allocated.
552	* @param cbHciTd Size of one transfer descriptor.
553	* @param cTds Number of transfer descriptors.
554	*/
555	DECLHIDDEN(PVUSBURB) vusbUrbPoolAlloc(PVUSBURBPOOL pUrbPool, VUSBXFERTYPE enmType,
556	VUSBDIRECTION enmDir, size_t cbData,
557	size_t cbHci, size_t cbHciTd, unsigned cTds);
558
559	/**
560	* Frees a given URB.
561	*
562	* @returns nothing.
563	* @param pUrbPool The URB pool the URB was allocated from.
564	* @param pUrb The URB to free.
565	*/
566	DECLHIDDEN(void) vusbUrbPoolFree(PVUSBURBPOOL pUrbPool, PVUSBURB pUrb);
567
568	#ifdef LOG_ENABLED
569	/**
570	* Logs an URB in the debug log.
571	*
572	* @returns nothing.
573	* @param pUrb The URB to log.
574	* @param pszMsg Additional message to log.
575	* @param fComplete Flag whther the URB is completing.
576	*/
577	DECLHIDDEN(void) vusbUrbTrace(PVUSBURB pUrb, const char *pszMsg, bool fComplete);
578
579	/**
580	* Return the USB direction as a string from the given enum.
581	*/
582	DECLHIDDEN(const char *) vusbUrbDirName(VUSBDIRECTION enmDir);
583
584	/**
585	* Return the URB type as string from the given enum.
586	*/
587	DECLHIDDEN(const char *) vusbUrbTypeName(VUSBXFERTYPE enmType);
588
589	/**
590	* Return the URB status as string from the given enum.
591	*/
592	DECLHIDDEN(const char *) vusbUrbStatusName(VUSBSTATUS enmStatus);
593	#endif
594
595	DECLINLINE(void) vusbUrbUnlink(PVUSBURB pUrb)
596	{
597	PVUSBDEV pDev = pUrb->pVUsb->pDev;
598
599	RTCritSectEnter(&pDev->CritSectAsyncUrbs);
600	RTListNodeRemove(&pUrb->pVUsb->NdLst);
601	RTCritSectLeave(&pDev->CritSectAsyncUrbs);
602	}
603
604	/** @def vusbUrbAssert
605	* Asserts that a URB is valid.
606	*/
607	#ifdef VBOX_STRICT
608	# define vusbUrbAssert(pUrb) do { \
609	AssertMsg(VALID_PTR((pUrb)), ("%p\n", (pUrb))); \
610	AssertMsg((pUrb)->u32Magic == VUSBURB_MAGIC, ("%#x", (pUrb)->u32Magic)); \
611	AssertMsg((pUrb)->enmState > VUSBURBSTATE_INVALID && (pUrb)->enmState < VUSBURBSTATE_END, \
612	("%d\n", (pUrb)->enmState)); \
613	} while (0)
614	#else
615	# define vusbUrbAssert(pUrb) do {} while (0)
616	#endif
617
618	/**
619	* @def VUSBDEV_ASSERT_VALID_STATE
620	* Asserts that the give device state is valid.
621	*/
622	#define VUSBDEV_ASSERT_VALID_STATE(enmState) \
623	AssertMsg((enmState) > VUSB_DEVICE_STATE_INVALID && (enmState) < VUSB_DEVICE_STATE_DESTROYED, ("enmState=%#x\n", enmState));
624
625	/** Executes a function synchronously. */
626	#define VUSB_DEV_IO_THREAD_EXEC_FLAGS_SYNC RT_BIT_32(0)
627
628	/** @} */
629
630
631
632
633	/**
634	* Addresses are between 0 and 127 inclusive
635	*/
636	DECLINLINE(uint8_t) vusbHashAddress(uint8_t Address)
637	{
638	uint8_t u8Hash = Address;
639	u8Hash ^= (Address >> 2);
640	u8Hash ^= (Address >> 3);
641	u8Hash %= VUSB_ADDR_HASHSZ;
642	return u8Hash;
643	}
644
645
646	/**
647	* Gets the roothub of a device.
648	*
649	* @returns Pointer to the roothub instance the device is attached to.
650	* @returns NULL if not attached to any hub.
651	* @param pDev Pointer to the device in question.
652	*/
653	DECLINLINE(PVUSBROOTHUB) vusbDevGetRh(PVUSBDEV pDev)
654	{
655	if (!pDev->pHub)
656	return NULL;
657	return pDev->pHub->pRootHub;
658	}
659
660
661	/**
662	* Returns the state of the USB device.
663	*
664	* @returns State of the USB device.
665	* @param pDev Pointer to the device.
666	*/
667	DECLINLINE(VUSBDEVICESTATE) vusbDevGetState(PVUSBDEV pDev)
668	{
669	VUSBDEVICESTATE enmState = (VUSBDEVICESTATE)ASMAtomicReadU32((volatile uint32_t *)&pDev->enmState);
670	VUSBDEV_ASSERT_VALID_STATE(enmState);
671	return enmState;
672	}
673
674
675	/**
676	* Sets the given state for the USB device.
677	*
678	* @returns The old state of the device.
679	* @param pDev Pointer to the device.
680	* @param enmState The new state to set.
681	*/
682	DECLINLINE(VUSBDEVICESTATE) vusbDevSetState(PVUSBDEV pDev, VUSBDEVICESTATE enmState)
683	{
684	VUSBDEV_ASSERT_VALID_STATE(enmState);
685	VUSBDEVICESTATE enmStateOld = (VUSBDEVICESTATE)ASMAtomicXchgU32((volatile uint32_t *)&pDev->enmState, enmState);
686	VUSBDEV_ASSERT_VALID_STATE(enmStateOld);
687	return enmStateOld;
688	}
689
690
691	/**
692	* Compare and exchange the states for the given USB device.
693	*
694	* @returns true if the state was changed.
695	* @returns false if the state wasn't changed.
696	* @param pDev Pointer to the device.
697	* @param enmStateNew The new state to set.
698	* @param enmStateOld The old state to compare with.
699	*/
700	DECLINLINE(bool) vusbDevSetStateCmp(PVUSBDEV pDev, VUSBDEVICESTATE enmStateNew, VUSBDEVICESTATE enmStateOld)
701	{
702	VUSBDEV_ASSERT_VALID_STATE(enmStateNew);
703	VUSBDEV_ASSERT_VALID_STATE(enmStateOld);
704	return ASMAtomicCmpXchgU32((volatile uint32_t *)&pDev->enmState, enmStateNew, enmStateOld);
705	}
706
707	/**
708	* Retains the given VUSB device pointer.
709	*
710	* @returns New reference count.
711	* @param pThis The VUSB device pointer.
712	*/
713	DECLINLINE(uint32_t) vusbDevRetain(PVUSBDEV pThis)
714	{
715	AssertPtrReturn(pThis, UINT32_MAX);
716
717	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
718	AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis));
719	return cRefs;
720	}
721
722	/**
723	* Releases the given VUSB device pointer.
724	*
725	* @returns New reference count.
726	* @retval 0 if no onw is holding a reference anymore causing the device to be destroyed.
727	*/
728	DECLINLINE(uint32_t) vusbDevRelease(PVUSBDEV pThis)
729	{
730	AssertPtrReturn(pThis, UINT32_MAX);
731
732	uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
733	AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis));
734	if (cRefs == 0)
735	vusbDevDestroy(pThis);
736	return cRefs;
737	}
738
739	/** Strings for the CTLSTAGE enum values. */
740	extern const char * const g_apszCtlStates[4];
741
742	RT_C_DECLS_END
743	#endif /* !VBOX_INCLUDED_SRC_USB_VUSBInternal_h */
744

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source: vbox/trunk/src/VBox/Devices/USB/VUSBInternal.h@ 78097

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