VUSBInternal.h@ 68080

Last change on this file since 68080 was 67590, checked in by vboxsync, 8 years ago
VUSB: Bit of infrastructure to allow frame delta (interval) tracking.
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1	/* $Id: VUSBInternal.h 67590 2017-06-23 19:24:52Z 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) 2006-2016 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 ___VUSBInternal_h
24	#define ___VUSBInternal_h
25
26	#include <VBox/cdefs.h>
27	#include <VBox/types.h>
28	#include <VBox/vusb.h>
29	#include <VBox/vmm/stam.h>
30	#include <VBox/vmm/pdm.h>
31	#include <VBox/vmm/vmapi.h>
32	#include <VBox/vmm/pdmusb.h>
33	#include <iprt/asm.h>
34	#include <iprt/assert.h>
35	#include <iprt/req.h>
36	#include <iprt/asm.h>
37	#include <iprt/list.h>
38
39	#include "VUSBSniffer.h"
40
41	RT_C_DECLS_BEGIN
42
43
44	/** @name Internal Device Operations, Structures and Constants.
45	* @{
46	*/
47
48	/** Pointer to a Virtual USB device (core). */
49	typedef struct VUSBDEV *PVUSBDEV;
50	/** Pointer to a VUSB hub device. */
51	typedef struct VUSBHUB *PVUSBHUB;
52	/** Pointer to a VUSB root hub. */
53	typedef struct VUSBROOTHUB *PVUSBROOTHUB;
54
55
56	/** Number of the default control endpoint */
57	#define VUSB_PIPE_DEFAULT 0
58
59	/** @name Device addresses
60	* @{ */
61	#define VUSB_DEFAULT_ADDRESS 0
62	#define VUSB_INVALID_ADDRESS UINT8_C(0xff)
63	/** @} */
64
65	/** @name Feature bits (1<<FEATURE for the u16Status bit)
66	* @{ */
67	#define VUSB_DEV_SELF_POWERED 0
68	#define VUSB_DEV_REMOTE_WAKEUP 1
69	#define VUSB_EP_HALT 0
70	/** @} */
71
72	/** Maximum number of endpoint addresses */
73	#define VUSB_PIPE_MAX 16
74
75	/**
76	* The VUSB URB data.
77	*/
78	typedef struct VUSBURBVUSBINT
79	{
80	/** Node for one of the lists the URB can be in. */
81	RTLISTNODE NdLst;
82	/** Pointer to the URB this structure is part of. */
83	PVUSBURB pUrb;
84	/** Pointer to the original for control messages. */
85	PVUSBURB pCtrlUrb;
86	/** Pointer to the VUSB device.
87	* This may be NULL if the destination address is invalid. */
88	PVUSBDEV pDev;
89	/** Specific to the pfnFree function. */
90	void *pvFreeCtx;
91	/**
92	* Callback which will free the URB once it's reaped and completed.
93	* @param pUrb The URB.
94	*/
95	DECLCALLBACKMEMBER(void, pfnFree)(PVUSBURB pUrb);
96	/** Submit timestamp. (logging only) */
97	uint64_t u64SubmitTS;
98	} VUSBURBVUSBINT;
99
100	/**
101	* Control-pipe stages.
102	*/
103	typedef enum CTLSTAGE
104	{
105	/** the control pipe is in the setup stage. */
106	CTLSTAGE_SETUP = 0,
107	/** the control pipe is in the data stage. */
108	CTLSTAGE_DATA,
109	/** the control pipe is in the status stage. */
110	CTLSTAGE_STATUS
111	} CTLSTAGE;
112
113	/**
114	* Extra data for a control pipe.
115	*
116	* This is state information needed for the special multi-stage
117	* transfers performed on this kind of pipes.
118	*/
119	typedef struct vusb_ctrl_extra
120	{
121	/** Current pipe stage. */
122	CTLSTAGE enmStage;
123	/** Success indicator. */
124	bool fOk;
125	/** Set if the message URB has been submitted. */
126	bool fSubmitted;
127	/** Pointer to the SETUP.
128	* This is a pointer to Urb->abData[0]. */
129	PVUSBSETUP pMsg;
130	/** Current DATA pointer.
131	* This starts at pMsg + 1 and is incremented at we read/write data. */
132	uint8_t *pbCur;
133	/** The amount of data left to read on IN operations.
134	* On OUT operations this is not used. */
135	uint32_t cbLeft;
136	/** The amount of data we can house.
137	* This starts at the default 8KB, and this structure will be reallocated to
138	* accommodate any larger request (unlikely). */
139	uint32_t cbMax;
140	/** The message URB. */
141	VUSBURB Urb;
142	} VUSBCTRLEXTRA, *PVUSBCTRLEXTRA;
143
144	void vusbMsgFreeExtraData(PVUSBCTRLEXTRA pExtra);
145	void vusbMsgResetExtraData(PVUSBCTRLEXTRA pExtra);
146
147	/**
148	* A VUSB pipe
149	*/
150	typedef struct vusb_pipe
151	{
152	PCVUSBDESCENDPOINTEX in;
153	PCVUSBDESCENDPOINTEX out;
154	/** Pointer to the extra state data required to run a control pipe. */
155	PVUSBCTRLEXTRA pCtrl;
156	/** Critical section serializing access to the extra state data for a control pipe. */
157	RTCRITSECT CritSectCtrl;
158	/** Count of active async transfers. */
159	volatile uint32_t async;
160	/** Last scheduled frame - only valid for isochronous IN endpoints. */
161	uint32_t uLastFrameIn;
162	/** Last scheduled frame - only valid for isochronous OUT endpoints. */
163	uint32_t uLastFrameOut;
164	} VUSBPIPE;
165	/** Pointer to a VUSB pipe structure. */
166	typedef VUSBPIPE *PVUSBPIPE;
167
168
169	/**
170	* Interface state and possible settings.
171	*/
172	typedef struct vusb_interface_state
173	{
174	/** Pointer to the interface descriptor of the currently selected (active)
175	* interface. */
176	PCVUSBDESCINTERFACEEX pCurIfDesc;
177	/** Pointer to the interface settings. */
178	PCVUSBINTERFACE pIf;
179	} VUSBINTERFACESTATE;
180	/** Pointer to interface state. */
181	typedef VUSBINTERFACESTATE *PVUSBINTERFACESTATE;
182	/** Pointer to const interface state. */
183	typedef const VUSBINTERFACESTATE *PCVUSBINTERFACESTATE;
184
185
186	/**
187	* VUSB URB pool.
188	*/
189	typedef struct VUSBURBPOOL
190	{
191	/** Critical section protecting the pool. */
192	RTCRITSECT CritSectPool;
193	/** Chain of free URBs by type. (Singly linked) */
194	RTLISTANCHOR aLstFreeUrbs[VUSBXFERTYPE_ELEMENTS];
195	/** The number of URBs in the pool. */
196	volatile uint32_t cUrbsInPool;
197	/** Align the size to a 8 byte boundary. */
198	uint32_t Alignment0;
199	} VUSBURBPOOL;
200	/** Pointer to a VUSB URB pool. */
201	typedef VUSBURBPOOL *PVUSBURBPOOL;
202
203	AssertCompileSizeAlignment(VUSBURBPOOL, 8);
204
205	/**
206	* A Virtual USB device (core).
207	*
208	* @implements VUSBIDEVICE
209	*/
210	typedef struct VUSBDEV
211	{
212	/** The device interface exposed to the HCI. */
213	VUSBIDEVICE IDevice;
214	/** Pointer to the PDM USB device instance. */
215	PPDMUSBINS pUsbIns;
216	/** Next device in the chain maintained by the roothub. */
217	PVUSBDEV pNext;
218	/** Pointer to the next device with the same address hash. */
219	PVUSBDEV pNextHash;
220	/** Pointer to the hub this device is attached to. */
221	PVUSBHUB pHub;
222	/** The device state. */
223	VUSBDEVICESTATE volatile enmState;
224	/** Reference counter to protect the device structure from going away. */
225	uint32_t volatile cRefs;
226
227	/** The device address. */
228	uint8_t u8Address;
229	/** The new device address. */
230	uint8_t u8NewAddress;
231	/** The port. */
232	int16_t i16Port;
233	/** Device status. (VUSB_DEV_SELF_POWERED or not.) */
234	uint16_t u16Status;
235
236	/** Pointer to the descriptor cache.
237	* (Provided by the device thru the pfnGetDescriptorCache method.) */
238	PCPDMUSBDESCCACHE pDescCache;
239	/** Current configuration. */
240	PCVUSBDESCCONFIGEX pCurCfgDesc;
241
242	/** Current interface state (including alternate interface setting) - maximum
243	* valid index is config->bNumInterfaces
244	*/
245	PVUSBINTERFACESTATE paIfStates;
246
247	/** Pipe/direction -> endpoint descriptor mapping */
248	VUSBPIPE aPipes[VUSB_PIPE_MAX];
249	/** Critical section protecting the active URB list. */
250	RTCRITSECT CritSectAsyncUrbs;
251	/** List of active async URBs. */
252	RTLISTANCHOR LstAsyncUrbs;
253
254	/** Dumper state. */
255	union VUSBDEVURBDUMPERSTATE
256	{
257	/** The current scsi command. */
258	uint8_t u8ScsiCmd;
259	} Urb;
260
261	/** The reset timer handle. */
262	PTMTIMER pResetTimer;
263	/** Reset handler arguments. */
264	void *pvArgs;
265	/** URB submit and reap thread. */
266	RTTHREAD hUrbIoThread;
267	/** Request queue for executing tasks on the I/O thread which should be done
268	* synchronous and without any other thread accessing the USB device. */
269	RTREQQUEUE hReqQueueSync;
270	/** Sniffer instance for this device if configured. */
271	VUSBSNIFFER hSniffer;
272	/** Flag whether the URB I/O thread should terminate. */
273	bool volatile fTerminate;
274	/** Flag whether the I/O thread was woken up. */
275	bool volatile fWokenUp;
276	#if HC_ARCH_BITS == 32
277	/** Align the size to a 8 byte boundary. */
278	bool afAlignment0[2];
279	#endif
280	/** The pool of free URBs for faster allocation. */
281	VUSBURBPOOL UrbPool;
282	} VUSBDEV;
283	AssertCompileSizeAlignment(VUSBDEV, 8);
284
285
286	int vusbDevInit(PVUSBDEV pDev, PPDMUSBINS pUsbIns, const char *pszCaptureFilename);
287	void vusbDevDestroy(PVUSBDEV pDev);
288
289	DECLINLINE(bool) vusbDevIsRh(PVUSBDEV pDev)
290	{
291	return (pDev->pHub == (PVUSBHUB)pDev);
292	}
293
294	bool vusbDevDoSelectConfig(PVUSBDEV dev, PCVUSBDESCCONFIGEX pCfg);
295	void vusbDevMapEndpoint(PVUSBDEV dev, PCVUSBDESCENDPOINTEX ep);
296	int vusbDevDetach(PVUSBDEV pDev);
297	DECLINLINE(PVUSBROOTHUB) vusbDevGetRh(PVUSBDEV pDev);
298	size_t vusbDevMaxInterfaces(PVUSBDEV dev);
299
300	void vusbDevSetAddress(PVUSBDEV pDev, uint8_t u8Address);
301	bool vusbDevStandardRequest(PVUSBDEV pDev, int EndPt, PVUSBSETUP pSetup, void pvBuf, uint32_t pcbBuf);
302
303
304	/** @} */
305
306
307	/** @name Internal Hub Operations, Structures and Constants.
308	* @{
309	*/
310
311
312	/** Virtual method table for USB hub devices.
313	* Hub and roothub drivers need to implement these functions in addition to the
314	* vusb_dev_ops.
315	*/
316	typedef struct VUSBHUBOPS
317	{
318	int (*pfnAttach)(PVUSBHUB pHub, PVUSBDEV pDev);
319	void (*pfnDetach)(PVUSBHUB pHub, PVUSBDEV pDev);
320	} VUSBHUBOPS;
321	/** Pointer to a const HUB method table. */
322	typedef const VUSBHUBOPS *PCVUSBHUBOPS;
323
324	/** A VUSB Hub Device - Hub and roothub drivers need to use this struct
325	* @todo eliminate this (PDM / roothubs only).
326	*/
327	typedef struct VUSBHUB
328	{
329	VUSBDEV Dev;
330	PCVUSBHUBOPS pOps;
331	PVUSBROOTHUB pRootHub;
332	uint16_t cPorts;
333	uint16_t cDevices;
334	/** Name of the hub. Used for logging. */
335	char *pszName;
336	} VUSBHUB;
337	AssertCompileMemberAlignment(VUSBHUB, pOps, 8);
338	AssertCompileSizeAlignment(VUSBHUB, 8);
339
340	/** @} */
341
342
343	/** @name Internal Root Hub Operations, Structures and Constants.
344	* @{
345	*/
346
347	/**
348	* Per transfer type statistics.
349	*/
350	typedef struct VUSBROOTHUBTYPESTATS
351	{
352	STAMCOUNTER StatUrbsSubmitted;
353	STAMCOUNTER StatUrbsFailed;
354	STAMCOUNTER StatUrbsCancelled;
355
356	STAMCOUNTER StatReqBytes;
357	STAMCOUNTER StatReqReadBytes;
358	STAMCOUNTER StatReqWriteBytes;
359
360	STAMCOUNTER StatActBytes;
361	STAMCOUNTER StatActReadBytes;
362	STAMCOUNTER StatActWriteBytes;
363	} VUSBROOTHUBTYPESTATS, *PVUSBROOTHUBTYPESTATS;
364
365
366
367	/** The address hash table size. */
368	#define VUSB_ADDR_HASHSZ 5
369
370	/**
371	* The instance data of a root hub driver.
372	*
373	* This extends the generic VUSB hub.
374	*
375	* @implements VUSBIROOTHUBCONNECTOR
376	*/
377	typedef struct VUSBROOTHUB
378	{
379	/** The HUB.
380	* @todo remove this? */
381	VUSBHUB Hub;
382	/** Address hash table. */
383	PVUSBDEV apAddrHash[VUSB_ADDR_HASHSZ];
384	/** The default address. */
385	PVUSBDEV pDefaultAddress;
386
387	/** Pointer to the driver instance. */
388	PPDMDRVINS pDrvIns;
389	/** Pointer to the root hub port interface we're attached to. */
390	PVUSBIROOTHUBPORT pIRhPort;
391	/** Connector interface exposed upwards. */
392	VUSBIROOTHUBCONNECTOR IRhConnector;
393
394	/** Critical section protecting the device list. */
395	RTCRITSECT CritSectDevices;
396	/** Chain of devices attached to this hub. */
397	PVUSBDEV pDevices;
398
399	#if HC_ARCH_BITS == 32
400	uint32_t Alignment0;
401	#endif
402
403	/** Availability Bitmap. */
404	VUSBPORTBITMAP Bitmap;
405
406	/** Sniffer instance for the root hub. */
407	VUSBSNIFFER hSniffer;
408	/** Version of the attached Host Controller. */
409	uint32_t fHcVersions;
410	/** Size of the HCI specific data for each URB. */
411	size_t cbHci;
412	/** Size of the HCI specific TD. */
413	size_t cbHciTd;
414
415	/** The periodic frame processing thread. */
416	R3PTRTYPE(PPDMTHREAD) hThreadPeriodFrame;
417	/** Event semaphore to interact with the periodic frame processing thread. */
418	R3PTRTYPE(RTSEMEVENTMULTI) hSemEventPeriodFrame;
419	/** Event semaphore to release the thread waiting for the periodic frame processing thread to stop. */
420	R3PTRTYPE(RTSEMEVENTMULTI) hSemEventPeriodFrameStopped;
421	/** Current default frame rate for periodic frame processing thread. */
422	volatile uint32_t uFrameRateDefault;
423	/** Current frame rate (can be lower than the default frame rate if there is no activity). */
424	uint32_t uFrameRate;
425	/** How long to wait until the next frame. */
426	uint64_t nsWait;
427	/** Timestamp when the last frame was processed. */
428	uint64_t tsFrameProcessed;
429	/** Number of USB work cycles with no transfers. */
430	uint32_t cIdleCycles;
431
432	/** Flag whether a frame is currently being processed. */
433	volatile bool fFrameProcessing;
434
435	#if HC_ARCH_BITS == 32
436	uint32_t Alignment1;
437	#endif
438
439	#ifdef LOG_ENABLED
440	/** A serial number for URBs submitted on the roothub instance.
441	* Only logging builds. */
442	uint32_t iSerial;
443	/** Alignment */
444	uint32_t Alignment2;
445	#endif
446	#ifdef VBOX_WITH_STATISTICS
447	VUSBROOTHUBTYPESTATS Total;
448	VUSBROOTHUBTYPESTATS aTypes[VUSBXFERTYPE_MSG];
449	STAMCOUNTER StatIsocReqPkts;
450	STAMCOUNTER StatIsocReqReadPkts;
451	STAMCOUNTER StatIsocReqWritePkts;
452	STAMCOUNTER StatIsocActPkts;
453	STAMCOUNTER StatIsocActReadPkts;
454	STAMCOUNTER StatIsocActWritePkts;
455	struct
456	{
457	STAMCOUNTER Pkts;
458	STAMCOUNTER Ok;
459	STAMCOUNTER Ok0;
460	STAMCOUNTER DataUnderrun;
461	STAMCOUNTER DataUnderrun0;
462	STAMCOUNTER DataOverrun;
463	STAMCOUNTER NotAccessed;
464	STAMCOUNTER Misc;
465	STAMCOUNTER Bytes;
466	} aStatIsocDetails[8];
467
468	STAMPROFILE StatReapAsyncUrbs;
469	STAMPROFILE StatSubmitUrb;
470	STAMCOUNTER StatFramesProcessedClbk;
471	STAMCOUNTER StatFramesProcessedThread;
472	#endif
473	} VUSBROOTHUB;
474	AssertCompileMemberAlignment(VUSBROOTHUB, IRhConnector, 8);
475	AssertCompileMemberAlignment(VUSBROOTHUB, Bitmap, 8);
476	AssertCompileMemberAlignment(VUSBROOTHUB, CritSectDevices, 8);
477	#ifdef VBOX_WITH_STATISTICS
478	AssertCompileMemberAlignment(VUSBROOTHUB, Total, 8);
479	#endif
480
481	/** Converts a pointer to VUSBROOTHUB::IRhConnector to a PVUSBROOTHUB. */
482	#define VUSBIROOTHUBCONNECTOR_2_VUSBROOTHUB(pInterface) (PVUSBROOTHUB)( (uintptr_t)(pInterface) - RT_OFFSETOF(VUSBROOTHUB, IRhConnector) )
483
484	/**
485	* URB cancellation modes
486	*/
487	typedef enum CANCELMODE
488	{
489	/** complete the URB with an error (CRC). */
490	CANCELMODE_FAIL = 0,
491	/** do not change the URB contents. */
492	CANCELMODE_UNDO
493	} CANCELMODE;
494
495	/* @} */
496
497
498
499	/** @name Internal URB Operations, Structures and Constants.
500	* @{ */
501	int vusbUrbSubmit(PVUSBURB pUrb);
502	void vusbUrbDoReapAsync(PRTLISTANCHOR pUrbLst, RTMSINTERVAL cMillies);
503	void vusbUrbDoReapAsyncDev(PVUSBDEV pDev, RTMSINTERVAL cMillies);
504	void vusbUrbCancel(PVUSBURB pUrb, CANCELMODE mode);
505	void vusbUrbCancelAsync(PVUSBURB pUrb, CANCELMODE mode);
506	void vusbUrbRipe(PVUSBURB pUrb);
507	void vusbUrbCompletionRh(PVUSBURB pUrb);
508	int vusbUrbSubmitHardError(PVUSBURB pUrb);
509	int vusbUrbErrorRh(PVUSBURB pUrb);
510	int vusbDevUrbIoThreadWakeup(PVUSBDEV pDev);
511	int vusbDevUrbIoThreadCreate(PVUSBDEV pDev);
512	int vusbDevUrbIoThreadDestroy(PVUSBDEV pDev);
513	DECLHIDDEN(void) vusbDevCancelAllUrbs(PVUSBDEV pDev, bool fDetaching);
514	DECLHIDDEN(int) vusbDevIoThreadExecV(PVUSBDEV pDev, uint32_t fFlags, PFNRT pfnFunction, unsigned cArgs, va_list Args);
515	DECLHIDDEN(int) vusbDevIoThreadExec(PVUSBDEV pDev, uint32_t fFlags, PFNRT pfnFunction, unsigned cArgs, ...);
516	DECLHIDDEN(int) vusbDevIoThreadExecSync(PVUSBDEV pDev, PFNRT pfnFunction, unsigned cArgs, ...);
517	DECLHIDDEN(int) vusbUrbCancelWorker(PVUSBURB pUrb, CANCELMODE enmMode);
518
519	DECLHIDDEN(uint64_t) vusbRhR3ProcessFrame(PVUSBROOTHUB pThis, bool fCallback);
520
521	int vusbUrbQueueAsyncRh(PVUSBURB pUrb);
522
523	/**
524	* Initializes the given URB pool.
525	*
526	* @returns VBox status code.
527	* @param pUrbPool The URB pool to initialize.
528	*/
529	DECLHIDDEN(int) vusbUrbPoolInit(PVUSBURBPOOL pUrbPool);
530
531	/**
532	* Destroy a given URB pool freeing all ressources.
533	*
534	* @returns nothing.
535	* @param pUrbPool The URB pool to destroy.
536	*/
537	DECLHIDDEN(void) vusbUrbPoolDestroy(PVUSBURBPOOL pUrbPool);
538
539	/**
540	* Allocate a new URB from the given URB pool.
541	*
542	* @returns Pointer to the new URB or NULL if out of memory.
543	* @param pUrbPool The URB pool to allocate from.
544	* @param enmType Type of the URB.
545	* @param enmDir The direction of the URB.
546	* @param cbData The number of bytes to allocate for the data buffer.
547	* @param cbHci Size of the data private to the HCI for each URB when allocated.
548	* @param cbHciTd Size of one transfer descriptor.
549	* @param cTds Number of transfer descriptors.
550	*/
551	DECLHIDDEN(PVUSBURB) vusbUrbPoolAlloc(PVUSBURBPOOL pUrbPool, VUSBXFERTYPE enmType,
552	VUSBDIRECTION enmDir, size_t cbData,
553	size_t cbHci, size_t cbHciTd, unsigned cTds);
554
555	/**
556	* Frees a given URB.
557	*
558	* @returns nothing.
559	* @param pUrbPool The URB pool the URB was allocated from.
560	* @param pUrb The URB to free.
561	*/
562	DECLHIDDEN(void) vusbUrbPoolFree(PVUSBURBPOOL pUrbPool, PVUSBURB pUrb);
563
564	#ifdef LOG_ENABLED
565	/**
566	* Logs an URB in the debug log.
567	*
568	* @returns nothing.
569	* @param pUrb The URB to log.
570	* @param pszMsg Additional message to log.
571	* @param fComplete Flag whther the URB is completing.
572	*/
573	DECLHIDDEN(void) vusbUrbTrace(PVUSBURB pUrb, const char *pszMsg, bool fComplete);
574
575	/**
576	* Return the USB direction as a string from the given enum.
577	*/
578	DECLHIDDEN(const char *) vusbUrbDirName(VUSBDIRECTION enmDir);
579
580	/**
581	* Return the URB type as string from the given enum.
582	*/
583	DECLHIDDEN(const char *) vusbUrbTypeName(VUSBXFERTYPE enmType);
584
585	/**
586	* Return the URB status as string from the given enum.
587	*/
588	DECLHIDDEN(const char *) vusbUrbStatusName(VUSBSTATUS enmStatus);
589	#endif
590
591	DECLINLINE(void) vusbUrbUnlink(PVUSBURB pUrb)
592	{
593	PVUSBDEV pDev = pUrb->pVUsb->pDev;
594
595	RTCritSectEnter(&pDev->CritSectAsyncUrbs);
596	RTListNodeRemove(&pUrb->pVUsb->NdLst);
597	RTCritSectLeave(&pDev->CritSectAsyncUrbs);
598	}
599
600	/** @def vusbUrbAssert
601	* Asserts that a URB is valid.
602	*/
603	#ifdef VBOX_STRICT
604	# define vusbUrbAssert(pUrb) do { \
605	AssertMsg(VALID_PTR((pUrb)), ("%p\n", (pUrb))); \
606	AssertMsg((pUrb)->u32Magic == VUSBURB_MAGIC, ("%#x", (pUrb)->u32Magic)); \
607	AssertMsg((pUrb)->enmState > VUSBURBSTATE_INVALID && (pUrb)->enmState < VUSBURBSTATE_END, \
608	("%d\n", (pUrb)->enmState)); \
609	} while (0)
610	#else
611	# define vusbUrbAssert(pUrb) do {} while (0)
612	#endif
613
614	/**
615	* @def VUSBDEV_ASSERT_VALID_STATE
616	* Asserts that the give device state is valid.
617	*/
618	#define VUSBDEV_ASSERT_VALID_STATE(enmState) \
619	AssertMsg((enmState) > VUSB_DEVICE_STATE_INVALID && (enmState) < VUSB_DEVICE_STATE_DESTROYED, ("enmState=%#x\n", enmState));
620
621	/** Executes a function synchronously. */
622	#define VUSB_DEV_IO_THREAD_EXEC_FLAGS_SYNC RT_BIT_32(0)
623
624	/** @} */
625
626
627
628
629	/**
630	* Addresses are between 0 and 127 inclusive
631	*/
632	DECLINLINE(uint8_t) vusbHashAddress(uint8_t Address)
633	{
634	uint8_t u8Hash = Address;
635	u8Hash ^= (Address >> 2);
636	u8Hash ^= (Address >> 3);
637	u8Hash %= VUSB_ADDR_HASHSZ;
638	return u8Hash;
639	}
640
641
642	/**
643	* Gets the roothub of a device.
644	*
645	* @returns Pointer to the roothub instance the device is attached to.
646	* @returns NULL if not attached to any hub.
647	* @param pDev Pointer to the device in question.
648	*/
649	DECLINLINE(PVUSBROOTHUB) vusbDevGetRh(PVUSBDEV pDev)
650	{
651	if (!pDev->pHub)
652	return NULL;
653	return pDev->pHub->pRootHub;
654	}
655
656
657	/**
658	* Returns the state of the USB device.
659	*
660	* @returns State of the USB device.
661	* @param pDev Pointer to the device.
662	*/
663	DECLINLINE(VUSBDEVICESTATE) vusbDevGetState(PVUSBDEV pDev)
664	{
665	VUSBDEVICESTATE enmState = (VUSBDEVICESTATE)ASMAtomicReadU32((volatile uint32_t *)&pDev->enmState);
666	VUSBDEV_ASSERT_VALID_STATE(enmState);
667	return enmState;
668	}
669
670
671	/**
672	* Sets the given state for the USB device.
673	*
674	* @returns The old state of the device.
675	* @param pDev Pointer to the device.
676	* @param enmState The new state to set.
677	*/
678	DECLINLINE(VUSBDEVICESTATE) vusbDevSetState(PVUSBDEV pDev, VUSBDEVICESTATE enmState)
679	{
680	VUSBDEV_ASSERT_VALID_STATE(enmState);
681	VUSBDEVICESTATE enmStateOld = (VUSBDEVICESTATE)ASMAtomicXchgU32((volatile uint32_t *)&pDev->enmState, enmState);
682	VUSBDEV_ASSERT_VALID_STATE(enmStateOld);
683	return enmStateOld;
684	}
685
686
687	/**
688	* Compare and exchange the states for the given USB device.
689	*
690	* @returns true if the state was changed.
691	* @returns false if the state wasn't changed.
692	* @param pDev Pointer to the device.
693	* @param enmStateNew The new state to set.
694	* @param enmStateOld The old state to compare with.
695	*/
696	DECLINLINE(bool) vusbDevSetStateCmp(PVUSBDEV pDev, VUSBDEVICESTATE enmStateNew, VUSBDEVICESTATE enmStateOld)
697	{
698	VUSBDEV_ASSERT_VALID_STATE(enmStateNew);
699	VUSBDEV_ASSERT_VALID_STATE(enmStateOld);
700	return ASMAtomicCmpXchgU32((volatile uint32_t *)&pDev->enmState, enmStateNew, enmStateOld);
701	}
702
703	/**
704	* Retains the given VUSB device pointer.
705	*
706	* @returns New reference count.
707	* @param pThis The VUSB device pointer.
708	*/
709	DECLINLINE(uint32_t) vusbDevRetain(PVUSBDEV pThis)
710	{
711	AssertPtrReturn(pThis, UINT32_MAX);
712
713	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
714	AssertMsg(cRefs > 1 && cRefs < _1M, ("%#x %p\n", cRefs, pThis));
715	return cRefs;
716	}
717
718	/**
719	* Releases the given VUSB device pointer.
720	*
721	* @returns New reference count.
722	* @retval 0 if no onw is holding a reference anymore causing the device to be destroyed.
723	*/
724	DECLINLINE(uint32_t) vusbDevRelease(PVUSBDEV pThis)
725	{
726	AssertPtrReturn(pThis, UINT32_MAX);
727
728	uint32_t cRefs = ASMAtomicDecU32(&pThis->cRefs);
729	AssertMsg(cRefs < _1M, ("%#x %p\n", cRefs, pThis));
730	if (cRefs == 0)
731	vusbDevDestroy(pThis);
732	return cRefs;
733	}
734
735	/** Strings for the CTLSTAGE enum values. */
736	extern const char * const g_apszCtlStates[4];
737	/** Default message pipe. */
738	extern const VUSBDESCENDPOINTEX g_Endpoint0;
739	/** Default configuration. */
740	extern const VUSBDESCCONFIGEX g_Config0;
741
742	RT_C_DECLS_END
743	#endif
744

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source: vbox/trunk/src/VBox/Devices/USB/VUSBInternal.h@ 68080

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