DevATA.cpp

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1	/* $Id: DevATA.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2	/** @file
3	* VBox storage devices: ATA/ATAPI controller device (disk and cdrom).
4	*/
5
6	/*
7	* Copyright (C) 2006-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_DEV_IDE
33	#include <VBox/vmm/pdmdev.h>
34	#include <VBox/vmm/pdmstorageifs.h>
35	#include <iprt/assert.h>
36	#include <iprt/string.h>
37	#ifdef IN_RING3
38	# include <iprt/mem.h>
39	# include <iprt/mp.h>
40	# include <iprt/semaphore.h>
41	# include <iprt/thread.h>
42	# include <iprt/time.h>
43	# include <iprt/uuid.h>
44	#endif /* IN_RING3 */
45	#include <iprt/critsect.h>
46	#include <iprt/asm.h>
47	#include <VBox/vmm/stam.h>
48	#include <VBox/vmm/mm.h>
49	#include <VBox/vmm/pgm.h>
50
51	#include <VBox/sup.h>
52	#include <VBox/AssertGuest.h>
53	#include <VBox/scsi.h>
54	#include <VBox/scsiinline.h>
55	#include <VBox/ata.h>
56
57	#include "ATAPIPassthrough.h"
58	#include "VBoxDD.h"
59
60
61	/*********************************************************************************************************************************
62	* Defined Constants And Macros *
63	*********************************************************************************************************************************/
64	/** Temporary instrumentation for tracking down potential virtual disk
65	* write performance issues. */
66	#undef VBOX_INSTRUMENT_DMA_WRITES
67
68	/** @name The SSM saved state versions.
69	* @{
70	*/
71	/** The current saved state version. */
72	#define ATA_SAVED_STATE_VERSION 21
73	/** Saved state version without iCurLBA for ATA commands. */
74	#define ATA_SAVED_STATE_VERSION_WITHOUT_ATA_ILBA 20
75	/** The saved state version used by VirtualBox 3.0.
76	* This lacks the config part and has the type at the and. */
77	#define ATA_SAVED_STATE_VERSION_VBOX_30 19
78	#define ATA_SAVED_STATE_VERSION_WITH_BOOL_TYPE 18
79	#define ATA_SAVED_STATE_VERSION_WITHOUT_FULL_SENSE 16
80	#define ATA_SAVED_STATE_VERSION_WITHOUT_EVENT_STATUS 17
81	/** @} */
82
83	/** Values read from an empty (with no devices attached) ATA bus. */
84	#define ATA_EMPTY_BUS_DATA 0x7F
85	#define ATA_EMPTY_BUS_DATA_32 0x7F7F7F7F
86
87	/**
88	* Maximum number of sectors to transfer in a READ/WRITE MULTIPLE request.
89	* Set to 1 to disable multi-sector read support. According to the ATA
90	* specification this must be a power of 2 and it must fit in an 8 bit
91	* value. Thus the only valid values are 1, 2, 4, 8, 16, 32, 64 and 128.
92	*/
93	#define ATA_MAX_MULT_SECTORS 128
94
95	/** The maxium I/O buffer size (for sanity). */
96	#define ATA_MAX_SECTOR_SIZE _4K
97	/** The maxium I/O buffer size (for sanity). */
98	#define ATA_MAX_IO_BUFFER_SIZE (ATA_MAX_MULT_SECTORS * ATA_MAX_SECTOR_SIZE)
99
100	/** Mask to be applied to all indexing into ATACONTROLLER::aIfs. */
101	#define ATA_SELECTED_IF_MASK 1
102
103	/**
104	* Fastest PIO mode supported by the drive.
105	*/
106	#define ATA_PIO_MODE_MAX 4
107	/**
108	* Fastest MDMA mode supported by the drive.
109	*/
110	#define ATA_MDMA_MODE_MAX 2
111	/**
112	* Fastest UDMA mode supported by the drive.
113	*/
114	#define ATA_UDMA_MODE_MAX 6
115
116	/** ATAPI sense info size. */
117	#define ATAPI_SENSE_SIZE 64
118
119	/** The maximum number of release log entries per device. */
120	#define MAX_LOG_REL_ERRORS 1024
121
122	/* MediaEventStatus */
123	#define ATA_EVENT_STATUS_UNCHANGED 0 /*< medium event status not changed /
124	#define ATA_EVENT_STATUS_MEDIA_EJECT_REQUESTED 1 /*< medium eject requested (eject button pressed) /
125	#define ATA_EVENT_STATUS_MEDIA_NEW 2 /*< new medium inserted /
126	#define ATA_EVENT_STATUS_MEDIA_REMOVED 3 /*< medium removed /
127	#define ATA_EVENT_STATUS_MEDIA_CHANGED 4 /*< medium was removed + new medium was inserted /
128
129	/* Media track type */
130	#define ATA_MEDIA_TYPE_UNKNOWN 0 /*< unknown CD type /
131	#define ATA_MEDIA_NO_DISC 0x70 /*< Door closed, no medium /
132
133	/** @defgroup grp_piix3atabmdma PIIX3 ATA Bus Master DMA
134	* @{
135	*/
136
137	/** @name BM_STATUS
138	* @{
139	*/
140	/** Currently performing a DMA operation. */
141	#define BM_STATUS_DMAING 0x01
142	/** An error occurred during the DMA operation. */
143	#define BM_STATUS_ERROR 0x02
144	/** The DMA unit has raised the IDE interrupt line. */
145	#define BM_STATUS_INT 0x04
146	/** User-defined bit 0, commonly used to signal that drive 0 supports DMA. */
147	#define BM_STATUS_D0DMA 0x20
148	/** User-defined bit 1, commonly used to signal that drive 1 supports DMA. */
149	#define BM_STATUS_D1DMA 0x40
150	/** @} */
151
152	/** @name BM_CMD
153	* @{
154	*/
155	/** Start the DMA operation. */
156	#define BM_CMD_START 0x01
157	/** Data transfer direction: from device to memory if set. */
158	#define BM_CMD_WRITE 0x08
159	/** @} */
160
161	/** Number of I/O ports per bus-master DMA controller. */
162	#define BM_DMA_CTL_IOPORTS 8
163	/** Mask corresponding to BM_DMA_CTL_IOPORTS. */
164	#define BM_DMA_CTL_IOPORTS_MASK 7
165	/** Shift count corresponding to BM_DMA_CTL_IOPORTS. */
166	#define BM_DMA_CTL_IOPORTS_SHIFT 3
167
168	/** @} */
169
170	#define ATADEVSTATE_2_DEVINS(pIf) ( (pIf)->CTX_SUFF(pDevIns) )
171	#define CONTROLLER_2_DEVINS(pController) ( (pController)->CTX_SUFF(pDevIns) )
172
173
174	/*********************************************************************************************************************************
175	* Structures and Typedefs *
176	*********************************************************************************************************************************/
177	/** @defgroup grp_piix3atabmdma PIIX3 ATA Bus Master DMA
178	* @{
179	*/
180	/** PIIX3 Bus Master DMA unit state. */
181	typedef struct BMDMAState
182	{
183	/** Command register. */
184	uint8_t u8Cmd;
185	/** Status register. */
186	uint8_t u8Status;
187	/** Explicit alignment padding. */
188	uint8_t abAlignment[2];
189	/** Address of the MMIO region in the guest's memory space. */
190	RTGCPHYS32 GCPhysAddr;
191	} BMDMAState;
192
193	/** PIIX3 Bus Master DMA descriptor entry. */
194	typedef struct BMDMADesc
195	{
196	/** Address of the DMA source/target buffer. */
197	RTGCPHYS32 GCPhysBuffer;
198	/** Size of the DMA source/target buffer. */
199	uint32_t cbBuffer;
200	} BMDMADesc;
201	/** @} */
202
203
204	/**
205	* The shared state of an ATA device.
206	*/
207	typedef struct ATADEVSTATE
208	{
209	/** The I/O buffer.
210	* @note Page aligned in case it helps. */
211	uint8_t abIOBuffer[ATA_MAX_IO_BUFFER_SIZE];
212
213	/** Flag indicating whether the current command uses LBA48 mode. */
214	bool fLBA48;
215	/** Flag indicating whether this drive implements the ATAPI command set. */
216	bool fATAPI;
217	/** Set if this interface has asserted the IRQ. */
218	bool fIrqPending;
219	/** Currently configured number of sectors in a multi-sector transfer. */
220	uint8_t cMultSectors;
221	/** Physical CHS disk geometry (static). */
222	PDMMEDIAGEOMETRY PCHSGeometry;
223	/** Translated CHS disk geometry (variable). */
224	PDMMEDIAGEOMETRY XCHSGeometry;
225	/** Total number of sectors on this disk. */
226	uint64_t cTotalSectors;
227	/** Sector size of the medium. */
228	uint32_t cbSector;
229	/** Number of sectors to transfer per IRQ. */
230	uint32_t cSectorsPerIRQ;
231
232	/** ATA/ATAPI register 1: feature (write-only). */
233	uint8_t uATARegFeature;
234	/** ATA/ATAPI register 1: feature, high order byte. */
235	uint8_t uATARegFeatureHOB;
236	/** ATA/ATAPI register 1: error (read-only). */
237	uint8_t uATARegError;
238	/** ATA/ATAPI register 2: sector count (read/write). */
239	uint8_t uATARegNSector;
240	/** ATA/ATAPI register 2: sector count, high order byte. */
241	uint8_t uATARegNSectorHOB;
242	/** ATA/ATAPI register 3: sector (read/write). */
243	uint8_t uATARegSector;
244	/** ATA/ATAPI register 3: sector, high order byte. */
245	uint8_t uATARegSectorHOB;
246	/** ATA/ATAPI register 4: cylinder low (read/write). */
247	uint8_t uATARegLCyl;
248	/** ATA/ATAPI register 4: cylinder low, high order byte. */
249	uint8_t uATARegLCylHOB;
250	/** ATA/ATAPI register 5: cylinder high (read/write). */
251	uint8_t uATARegHCyl;
252	/** ATA/ATAPI register 5: cylinder high, high order byte. */
253	uint8_t uATARegHCylHOB;
254	/** ATA/ATAPI register 6: select drive/head (read/write). */
255	uint8_t uATARegSelect;
256	/** ATA/ATAPI register 7: status (read-only). */
257	uint8_t uATARegStatus;
258	/** ATA/ATAPI register 7: command (write-only). */
259	uint8_t uATARegCommand;
260	/** ATA/ATAPI drive control register (write-only). */
261	uint8_t uATARegDevCtl;
262
263	/** Currently active transfer mode (MDMA/UDMA) and speed. */
264	uint8_t uATATransferMode;
265	/** Current transfer direction. */
266	uint8_t uTxDir;
267	/** Index of callback for begin transfer. */
268	uint8_t iBeginTransfer;
269	/** Index of callback for source/sink of data. */
270	uint8_t iSourceSink;
271	/** Flag indicating whether the current command transfers data in DMA mode. */
272	bool fDMA;
273	/** Set to indicate that ATAPI transfer semantics must be used. */
274	bool fATAPITransfer;
275
276	/** Total ATA/ATAPI transfer size, shared PIO/DMA. */
277	uint32_t cbTotalTransfer;
278	/** Elementary ATA/ATAPI transfer size, shared PIO/DMA. */
279	uint32_t cbElementaryTransfer;
280	/** Maximum ATAPI elementary transfer size, PIO only. */
281	uint32_t cbPIOTransferLimit;
282	/** ATAPI passthrough transfer size, shared PIO/DMA */
283	uint32_t cbAtapiPassthroughTransfer;
284	/** Current read/write buffer position, shared PIO/DMA. */
285	uint32_t iIOBufferCur;
286	/** First element beyond end of valid buffer content, shared PIO/DMA. */
287	uint32_t iIOBufferEnd;
288	/** Align the following fields correctly. */
289	uint32_t Alignment0;
290
291	/** ATA/ATAPI current PIO read/write transfer position. Not shared with DMA for safety reasons. */
292	uint32_t iIOBufferPIODataStart;
293	/** ATA/ATAPI current PIO read/write transfer end. Not shared with DMA for safety reasons. */
294	uint32_t iIOBufferPIODataEnd;
295
296	/** Current LBA position (both ATA/ATAPI). */
297	uint32_t iCurLBA;
298	/** ATAPI current sector size. */
299	uint32_t cbATAPISector;
300	/** ATAPI current command. */
301	uint8_t abATAPICmd[ATAPI_PACKET_SIZE];
302	/** ATAPI sense data. */
303	uint8_t abATAPISense[ATAPI_SENSE_SIZE];
304	/** HACK: Countdown till we report a newly unmounted drive as mounted. */
305	uint8_t cNotifiedMediaChange;
306	/** The same for GET_EVENT_STATUS for mechanism */
307	volatile uint32_t MediaEventStatus;
308
309	/** Media type if known. */
310	volatile uint32_t MediaTrackType;
311
312	/** The status LED state for this drive. */
313	PDMLED Led;
314
315	/** Size of I/O buffer. */
316	uint32_t cbIOBuffer;
317
318	/*
319	* No data that is part of the saved state after this point!!!!!
320	*/
321
322	/** Counter for number of busy status seen in R3 in a row. */
323	uint8_t cBusyStatusHackR3;
324	/** Counter for number of busy status seen in GC/R0 in a row. */
325	uint8_t cBusyStatusHackRZ;
326	/** Defines the R3 yield rate by a mask (power of 2 minus one).
327	* Lower is more agressive. */
328	uint8_t cBusyStatusHackR3Rate;
329	/** Defines the R0/RC yield rate by a mask (power of 2 minus one).
330	* Lower is more agressive. */
331	uint8_t cBusyStatusHackRZRate;
332
333	/** Release statistics: number of ATA DMA commands. */
334	STAMCOUNTER StatATADMA;
335	/** Release statistics: number of ATA PIO commands. */
336	STAMCOUNTER StatATAPIO;
337	/** Release statistics: number of ATAPI PIO commands. */
338	STAMCOUNTER StatATAPIDMA;
339	/** Release statistics: number of ATAPI PIO commands. */
340	STAMCOUNTER StatATAPIPIO;
341	#ifdef VBOX_INSTRUMENT_DMA_WRITES
342	/** Release statistics: number of DMA sector writes and the time spent. */
343	STAMPROFILEADV StatInstrVDWrites;
344	#endif
345	/** Release statistics: Profiling RTThreadYield calls during status polling. */
346	STAMPROFILEADV StatStatusYields;
347
348	/** Statistics: number of read operations and the time spent reading. */
349	STAMPROFILEADV StatReads;
350	/** Statistics: number of bytes read. */
351	STAMCOUNTER StatBytesRead;
352	/** Statistics: number of write operations and the time spent writing. */
353	STAMPROFILEADV StatWrites;
354	/** Statistics: number of bytes written. */
355	STAMCOUNTER StatBytesWritten;
356	/** Statistics: number of flush operations and the time spend flushing. */
357	STAMPROFILE StatFlushes;
358
359	/** Enable passing through commands directly to the ATAPI drive. */
360	bool fATAPIPassthrough;
361	/** Flag whether to overwrite inquiry data in passthrough mode. */
362	bool fOverwriteInquiry;
363	/** Number of errors we've reported to the release log.
364	* This is to prevent flooding caused by something going horribly wrong.
365	* this value against MAX_LOG_REL_ERRORS in places likely to cause floods
366	* like the ones we currently seeing on the linux smoke tests (2006-11-10). */
367	uint32_t cErrors;
368	/** Timestamp of last started command. 0 if no command pending. */
369	uint64_t u64CmdTS;
370
371	/** The LUN number. */
372	uint32_t iLUN;
373	/** The controller number. */
374	uint8_t iCtl;
375	/** The device number. */
376	uint8_t iDev;
377	/** Set if the device is present. */
378	bool fPresent;
379	/** Explicit alignment. */
380	uint8_t bAlignment2;
381
382	/** The serial number to use for IDENTIFY DEVICE commands. */
383	char szSerialNumber[ATA_SERIAL_NUMBER_LENGTH+1];
384	/** The firmware revision to use for IDENTIFY DEVICE commands. */
385	char szFirmwareRevision[ATA_FIRMWARE_REVISION_LENGTH+1];
386	/** The model number to use for IDENTIFY DEVICE commands. */
387	char szModelNumber[ATA_MODEL_NUMBER_LENGTH+1];
388	/** The vendor identification string for SCSI INQUIRY commands. */
389	char szInquiryVendorId[SCSI_INQUIRY_VENDOR_ID_LENGTH+1];
390	/** The product identification string for SCSI INQUIRY commands. */
391	char szInquiryProductId[SCSI_INQUIRY_PRODUCT_ID_LENGTH+1];
392	/** The revision string for SCSI INQUIRY commands. */
393	char szInquiryRevision[SCSI_INQUIRY_REVISION_LENGTH+1];
394
395	/** Padding the structure to a multiple of 4096 for better I/O buffer alignment. */
396	uint8_t abAlignment4[7 + 3528];
397	} ATADEVSTATE;
398	AssertCompileMemberAlignment(ATADEVSTATE, cTotalSectors, 8);
399	AssertCompileMemberAlignment(ATADEVSTATE, StatATADMA, 8);
400	AssertCompileMemberAlignment(ATADEVSTATE, u64CmdTS, 8);
401	AssertCompileMemberAlignment(ATADEVSTATE, szSerialNumber, 8);
402	AssertCompileSizeAlignment(ATADEVSTATE, 4096); /* To align the buffer on a page boundrary. */
403	/** Pointer to the shared state of an ATA device. */
404	typedef ATADEVSTATE *PATADEVSTATE;
405
406
407	/**
408	* The ring-3 state of an ATA device.
409	*
410	* @implements PDMIBASE
411	* @implements PDMIBLOCKPORT
412	* @implements PDMIMOUNTNOTIFY
413	*/
414	typedef struct ATADEVSTATER3
415	{
416	/** Pointer to the attached driver's base interface. */
417	R3PTRTYPE(PPDMIBASE) pDrvBase;
418	/** Pointer to the attached driver's block interface. */
419	R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
420	/** Pointer to the attached driver's mount interface.
421	* This is NULL if the driver isn't a removable unit. */
422	R3PTRTYPE(PPDMIMOUNT) pDrvMount;
423	/** The base interface. */
424	PDMIBASE IBase;
425	/** The block port interface. */
426	PDMIMEDIAPORT IPort;
427	/** The mount notify interface. */
428	PDMIMOUNTNOTIFY IMountNotify;
429
430	/** The LUN number. */
431	uint32_t iLUN;
432	/** The controller number. */
433	uint8_t iCtl;
434	/** The device number. */
435	uint8_t iDev;
436	/** Explicit alignment. */
437	uint8_t abAlignment2[2];
438	/** The device instance so we can get our bearings from an interface method. */
439	PPDMDEVINSR3 pDevIns;
440
441	/** The current tracklist of the loaded medium if passthrough is used. */
442	R3PTRTYPE(PTRACKLIST) pTrackList;
443	} ATADEVSTATER3;
444	/** Pointer to the ring-3 state of an ATA device. */
445	typedef ATADEVSTATER3 *PATADEVSTATER3;
446
447
448	/**
449	* Transfer request forwarded to the async I/O thread.
450	*/
451	typedef struct ATATransferRequest
452	{
453	/** The interface index the request is for. */
454	uint8_t iIf;
455	/** The index of the begin transfer callback to call. */
456	uint8_t iBeginTransfer;
457	/** The index of the source sink callback to call for doing the transfer. */
458	uint8_t iSourceSink;
459	/** Transfer direction. */
460	uint8_t uTxDir;
461	/** How many bytes to transfer. */
462	uint32_t cbTotalTransfer;
463	} ATATransferRequest;
464
465
466	/**
467	* Abort request forwarded to the async I/O thread.
468	*/
469	typedef struct ATAAbortRequest
470	{
471	/** The interface index the request is for. */
472	uint8_t iIf;
473	/** Flag whether to reset the drive. */
474	bool fResetDrive;
475	} ATAAbortRequest;
476
477
478	/**
479	* Request type indicator.
480	*/
481	typedef enum
482	{
483	/** Begin a new transfer. */
484	ATA_AIO_NEW = 0,
485	/** Continue a DMA transfer. */
486	ATA_AIO_DMA,
487	/** Continue a PIO transfer. */
488	ATA_AIO_PIO,
489	/** Reset the drives on current controller, stop all transfer activity. */
490	ATA_AIO_RESET_ASSERTED,
491	/** Reset the drives on current controller, resume operation. */
492	ATA_AIO_RESET_CLEARED,
493	/** Abort the current transfer of a particular drive. */
494	ATA_AIO_ABORT
495	} ATAAIO;
496
497
498	/**
499	* Combining structure for an ATA request to the async I/O thread
500	* started with the request type insicator.
501	*/
502	typedef struct ATARequest
503	{
504	/** Request type. */
505	ATAAIO ReqType;
506	/** Request type dependent data. */
507	union
508	{
509	/** Transfer request specific data. */
510	ATATransferRequest t;
511	/** Abort request specific data. */
512	ATAAbortRequest a;
513	} u;
514	} ATARequest;
515
516
517	/**
518	* The shared state of an ATA controller.
519	*
520	* Has two devices, the master (0) and the slave (1).
521	*/
522	typedef struct ATACONTROLLER
523	{
524	/** The ATA/ATAPI interfaces of this controller. */
525	ATADEVSTATE aIfs[2];
526
527	/** The base of the first I/O Port range. */
528	RTIOPORT IOPortBase1;
529	/** The base of the second I/O Port range. (0 if none) */
530	RTIOPORT IOPortBase2;
531	/** The assigned IRQ. */
532	uint32_t irq;
533	/** Access critical section */
534	PDMCRITSECT lock;
535
536	/** Selected drive. */
537	uint8_t iSelectedIf;
538	/** The interface on which to handle async I/O. */
539	uint8_t iAIOIf;
540	/** The state of the async I/O thread. */
541	uint8_t uAsyncIOState;
542	/** Flag indicating whether the next transfer is part of the current command. */
543	bool fChainedTransfer;
544	/** Set when the reset processing is currently active on this controller. */
545	bool fReset;
546	/** Flag whether the current transfer needs to be redone. */
547	bool fRedo;
548	/** Flag whether the redo suspend has been finished. */
549	bool fRedoIdle;
550	/** Flag whether the DMA operation to be redone is the final transfer. */
551	bool fRedoDMALastDesc;
552	/** The BusMaster DMA state. */
553	BMDMAState BmDma;
554	/** Pointer to first DMA descriptor. */
555	RTGCPHYS32 GCPhysFirstDMADesc;
556	/** Pointer to last DMA descriptor. */
557	RTGCPHYS32 GCPhysLastDMADesc;
558	/** Pointer to current DMA buffer (for redo operations). */
559	RTGCPHYS32 GCPhysRedoDMABuffer;
560	/** Size of current DMA buffer (for redo operations). */
561	uint32_t cbRedoDMABuffer;
562
563	/** The event semaphore the thread is waiting on for requests. */
564	SUPSEMEVENT hAsyncIOSem;
565	/** The request queue for the AIO thread. One element is always unused. */
566	ATARequest aAsyncIORequests[4];
567	/** The position at which to insert a new request for the AIO thread. */
568	volatile uint8_t AsyncIOReqHead;
569	/** The position at which to get a new request for the AIO thread. */
570	volatile uint8_t AsyncIOReqTail;
571	/** The controller number. */
572	uint8_t iCtl;
573	/** Magic delay before triggering interrupts in DMA mode. */
574	uint32_t msDelayIRQ;
575	/** The lock protecting the request queue. */
576	PDMCRITSECT AsyncIORequestLock;
577
578	/** Timestamp we started the reset. */
579	uint64_t u64ResetTime;
580
581	/** The first port in the first I/O port range, regular operation. */
582	IOMIOPORTHANDLE hIoPorts1First;
583	/** The other ports in the first I/O port range, regular operation. */
584	IOMIOPORTHANDLE hIoPorts1Other;
585	/** The second I/O port range, regular operation. */
586	IOMIOPORTHANDLE hIoPorts2;
587	/** The first I/O port range, empty controller operation. */
588	IOMIOPORTHANDLE hIoPortsEmpty1;
589	/** The second I/O port range, empty controller operation. */
590	IOMIOPORTHANDLE hIoPortsEmpty2;
591
592	/* Statistics */
593	STAMCOUNTER StatAsyncOps;
594	uint64_t StatAsyncMinWait;
595	uint64_t StatAsyncMaxWait;
596	STAMCOUNTER StatAsyncTimeUS;
597	STAMPROFILEADV StatAsyncTime;
598	STAMPROFILE StatLockWait;
599	uint8_t abAlignment4[3328];
600	} ATACONTROLLER;
601	AssertCompileMemberAlignment(ATACONTROLLER, lock, 8);
602	AssertCompileMemberAlignment(ATACONTROLLER, aIfs, 8);
603	AssertCompileMemberAlignment(ATACONTROLLER, u64ResetTime, 8);
604	AssertCompileMemberAlignment(ATACONTROLLER, StatAsyncOps, 8);
605	AssertCompileMemberAlignment(ATACONTROLLER, AsyncIORequestLock, 8);
606	AssertCompileSizeAlignment(ATACONTROLLER, 4096); /* To align the controllers, devices and I/O buffers on page boundaries. */
607	/** Pointer to the shared state of an ATA controller. */
608	typedef ATACONTROLLER *PATACONTROLLER;
609
610
611	/**
612	* The ring-3 state of an ATA controller.
613	*/
614	typedef struct ATACONTROLLERR3
615	{
616	/** The ATA/ATAPI interfaces of this controller. */
617	ATADEVSTATER3 aIfs[2];
618
619	/** Pointer to device instance. */
620	PPDMDEVINSR3 pDevIns;
621
622	/** The async I/O thread handle. NIL_RTTHREAD if no thread. */
623	RTTHREAD hAsyncIOThread;
624	/** The event semaphore the thread is waiting on during suspended I/O. */
625	RTSEMEVENT hSuspendIOSem;
626	/** Set when the destroying the device instance and the thread must exit. */
627	uint32_t volatile fShutdown;
628	/** Whether to call PDMDevHlpAsyncNotificationCompleted when idle. */
629	bool volatile fSignalIdle;
630
631	/** The controller number. */
632	uint8_t iCtl;
633
634	uint8_t abAlignment[3];
635	} ATACONTROLLERR3;
636	/** Pointer to the ring-3 state of an ATA controller. */
637	typedef ATACONTROLLERR3 *PATACONTROLLERR3;
638
639
640	/** ATA chipset type. */
641	typedef enum CHIPSET
642	{
643	/** PIIX3 chipset, must be 0 for saved state compatibility */
644	CHIPSET_PIIX3 = 0,
645	/** PIIX4 chipset, must be 1 for saved state compatibility */
646	CHIPSET_PIIX4,
647	/** ICH6 chipset */
648	CHIPSET_ICH6,
649	CHIPSET_32BIT_HACK=0x7fffffff
650	} CHIPSET;
651	AssertCompileSize(CHIPSET, 4);
652
653	/**
654	* The shared state of a ATA PCI device.
655	*/
656	typedef struct ATASTATE
657	{
658	/** The controllers. */
659	ATACONTROLLER aCts[2];
660	/** Flag indicating chipset being emulated. */
661	CHIPSET enmChipset;
662	/** Explicit alignment padding. */
663	uint8_t abAlignment1[7];
664	/** PCI region \#4: Bus-master DMA I/O ports. */
665	IOMIOPORTHANDLE hIoPortsBmDma;
666	} ATASTATE;
667	/** Pointer to the shared state of an ATA PCI device. */
668	typedef ATASTATE *PATASTATE;
669
670
671	/**
672	* The ring-3 state of a ATA PCI device.
673	*
674	* @implements PDMILEDPORTS
675	*/
676	typedef struct ATASTATER3
677	{
678	/** The controllers. */
679	ATACONTROLLERR3 aCts[2];
680	/** Status LUN: Base interface. */
681	PDMIBASE IBase;
682	/** Status LUN: Leds interface. */
683	PDMILEDPORTS ILeds;
684	/** Status LUN: Partner of ILeds. */
685	R3PTRTYPE(PPDMILEDCONNECTORS) pLedsConnector;
686	/** Status LUN: Media Notify. */
687	R3PTRTYPE(PPDMIMEDIANOTIFY) pMediaNotify;
688	/** Pointer to device instance (for getting our bearings in interface methods). */
689	PPDMDEVINSR3 pDevIns;
690	} ATASTATER3;
691	/** Pointer to the ring-3 state of an ATA PCI device. */
692	typedef ATASTATER3 *PATASTATER3;
693
694
695	/**
696	* The ring-0 state of the ATA PCI device.
697	*/
698	typedef struct ATASTATER0
699	{
700	uint64_t uUnused;
701	} ATASTATER0;
702	/** Pointer to the ring-0 state of an ATA PCI device. */
703	typedef ATASTATER0 *PATASTATER0;
704
705
706	/**
707	* The raw-mode state of the ATA PCI device.
708	*/
709	typedef struct ATASTATERC
710	{
711	uint64_t uUnused;
712	} ATASTATERC;
713	/** Pointer to the raw-mode state of an ATA PCI device. */
714	typedef ATASTATERC *PATASTATERC;
715
716
717	/** The current context state of an ATA PCI device. */
718	typedef CTX_SUFF(ATASTATE) ATASTATECC;
719	/** Pointer to the current context state of an ATA PCI device. */
720	typedef CTX_SUFF(PATASTATE) PATASTATECC;
721
722
723	#ifndef VBOX_DEVICE_STRUCT_TESTCASE
724
725
726	#ifdef IN_RING3
727	DECLINLINE(void) ataSetStatusValue(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t stat)
728	{
729	/* Freeze status register contents while processing RESET. */
730	if (!pCtl->fReset)
731	{
732	s->uATARegStatus = stat;
733	Log2(("%s: LUN#%d status %#04x\n", __FUNCTION__, s->iLUN, s->uATARegStatus));
734	}
735	}
736	#endif /* IN_RING3 */
737
738
739	DECLINLINE(void) ataSetStatus(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t stat)
740	{
741	/* Freeze status register contents while processing RESET. */
742	if (!pCtl->fReset)
743	{
744	s->uATARegStatus \|= stat;
745	Log2(("%s: LUN#%d status %#04x\n", __FUNCTION__, s->iLUN, s->uATARegStatus));
746	}
747	}
748
749
750	DECLINLINE(void) ataUnsetStatus(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t stat)
751	{
752	/* Freeze status register contents while processing RESET. */
753	if (!pCtl->fReset)
754	{
755	s->uATARegStatus &= ~stat;
756	Log2(("%s: LUN#%d status %#04x\n", __FUNCTION__, s->iLUN, s->uATARegStatus));
757	}
758	}
759
760	#if defined(IN_RING3) \|\| defined(IN_RING0)
761
762	# ifdef IN_RING3
763	typedef void FNBEGINTRANSFER(PATACONTROLLER pCtl, PATADEVSTATE s);
764	typedef FNBEGINTRANSFER *PFNBEGINTRANSFER;
765	typedef bool FNSOURCESINK(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3);
766	typedef FNSOURCESINK *PFNSOURCESINK;
767
768	static FNBEGINTRANSFER ataR3ReadWriteSectorsBT;
769	static FNBEGINTRANSFER ataR3PacketBT;
770	static FNBEGINTRANSFER atapiR3CmdBT;
771	static FNBEGINTRANSFER atapiR3PassthroughCmdBT;
772
773	static FNSOURCESINK ataR3IdentifySS;
774	static FNSOURCESINK ataR3FlushSS;
775	static FNSOURCESINK ataR3ReadSectorsSS;
776	static FNSOURCESINK ataR3WriteSectorsSS;
777	static FNSOURCESINK ataR3ExecuteDeviceDiagnosticSS;
778	static FNSOURCESINK ataR3TrimSS;
779	static FNSOURCESINK ataR3PacketSS;
780	static FNSOURCESINK ataR3InitDevParmSS;
781	static FNSOURCESINK ataR3RecalibrateSS;
782	static FNSOURCESINK atapiR3GetConfigurationSS;
783	static FNSOURCESINK atapiR3GetEventStatusNotificationSS;
784	static FNSOURCESINK atapiR3IdentifySS;
785	static FNSOURCESINK atapiR3InquirySS;
786	static FNSOURCESINK atapiR3MechanismStatusSS;
787	static FNSOURCESINK atapiR3ModeSenseErrorRecoverySS;
788	static FNSOURCESINK atapiR3ModeSenseCDStatusSS;
789	static FNSOURCESINK atapiR3ReadSS;
790	static FNSOURCESINK atapiR3ReadCapacitySS;
791	static FNSOURCESINK atapiR3ReadDiscInformationSS;
792	static FNSOURCESINK atapiR3ReadTOCNormalSS;
793	static FNSOURCESINK atapiR3ReadTOCMultiSS;
794	static FNSOURCESINK atapiR3ReadTOCRawSS;
795	static FNSOURCESINK atapiR3ReadTrackInformationSS;
796	static FNSOURCESINK atapiR3RequestSenseSS;
797	static FNSOURCESINK atapiR3PassthroughSS;
798	static FNSOURCESINK atapiR3ReadDVDStructureSS;
799	# endif /* IN_RING3 */
800
801	/**
802	* Begin of transfer function indexes for g_apfnBeginTransFuncs.
803	*/
804	typedef enum ATAFNBT
805	{
806	ATAFN_BT_NULL = 0,
807	ATAFN_BT_READ_WRITE_SECTORS,
808	ATAFN_BT_PACKET,
809	ATAFN_BT_ATAPI_CMD,
810	ATAFN_BT_ATAPI_PASSTHROUGH_CMD,
811	ATAFN_BT_MAX
812	} ATAFNBT;
813
814	# ifdef IN_RING3
815	/**
816	* Array of end transfer functions, the index is ATAFNET.
817	* Make sure ATAFNET and this array match!
818	*/
819	static const PFNBEGINTRANSFER g_apfnBeginTransFuncs[ATAFN_BT_MAX] =
820	{
821	NULL,
822	ataR3ReadWriteSectorsBT,
823	ataR3PacketBT,
824	atapiR3CmdBT,
825	atapiR3PassthroughCmdBT,
826	};
827	# endif /* IN_RING3 */
828
829	/**
830	* Source/sink function indexes for g_apfnSourceSinkFuncs.
831	*/
832	typedef enum ATAFNSS
833	{
834	ATAFN_SS_NULL = 0,
835	ATAFN_SS_IDENTIFY,
836	ATAFN_SS_FLUSH,
837	ATAFN_SS_READ_SECTORS,
838	ATAFN_SS_WRITE_SECTORS,
839	ATAFN_SS_EXECUTE_DEVICE_DIAGNOSTIC,
840	ATAFN_SS_TRIM,
841	ATAFN_SS_PACKET,
842	ATAFN_SS_INITIALIZE_DEVICE_PARAMETERS,
843	ATAFN_SS_RECALIBRATE,
844	ATAFN_SS_ATAPI_GET_CONFIGURATION,
845	ATAFN_SS_ATAPI_GET_EVENT_STATUS_NOTIFICATION,
846	ATAFN_SS_ATAPI_IDENTIFY,
847	ATAFN_SS_ATAPI_INQUIRY,
848	ATAFN_SS_ATAPI_MECHANISM_STATUS,
849	ATAFN_SS_ATAPI_MODE_SENSE_ERROR_RECOVERY,
850	ATAFN_SS_ATAPI_MODE_SENSE_CD_STATUS,
851	ATAFN_SS_ATAPI_READ,
852	ATAFN_SS_ATAPI_READ_CAPACITY,
853	ATAFN_SS_ATAPI_READ_DISC_INFORMATION,
854	ATAFN_SS_ATAPI_READ_TOC_NORMAL,
855	ATAFN_SS_ATAPI_READ_TOC_MULTI,
856	ATAFN_SS_ATAPI_READ_TOC_RAW,
857	ATAFN_SS_ATAPI_READ_TRACK_INFORMATION,
858	ATAFN_SS_ATAPI_REQUEST_SENSE,
859	ATAFN_SS_ATAPI_PASSTHROUGH,
860	ATAFN_SS_ATAPI_READ_DVD_STRUCTURE,
861	ATAFN_SS_MAX
862	} ATAFNSS;
863
864	# ifdef IN_RING3
865	/**
866	* Array of source/sink functions, the index is ATAFNSS.
867	* Make sure ATAFNSS and this array match!
868	*/
869	static const PFNSOURCESINK g_apfnSourceSinkFuncs[ATAFN_SS_MAX] =
870	{
871	NULL,
872	ataR3IdentifySS,
873	ataR3FlushSS,
874	ataR3ReadSectorsSS,
875	ataR3WriteSectorsSS,
876	ataR3ExecuteDeviceDiagnosticSS,
877	ataR3TrimSS,
878	ataR3PacketSS,
879	ataR3InitDevParmSS,
880	ataR3RecalibrateSS,
881	atapiR3GetConfigurationSS,
882	atapiR3GetEventStatusNotificationSS,
883	atapiR3IdentifySS,
884	atapiR3InquirySS,
885	atapiR3MechanismStatusSS,
886	atapiR3ModeSenseErrorRecoverySS,
887	atapiR3ModeSenseCDStatusSS,
888	atapiR3ReadSS,
889	atapiR3ReadCapacitySS,
890	atapiR3ReadDiscInformationSS,
891	atapiR3ReadTOCNormalSS,
892	atapiR3ReadTOCMultiSS,
893	atapiR3ReadTOCRawSS,
894	atapiR3ReadTrackInformationSS,
895	atapiR3RequestSenseSS,
896	atapiR3PassthroughSS,
897	atapiR3ReadDVDStructureSS
898	};
899	# endif /* IN_RING3 */
900
901
902	static const ATARequest g_ataDMARequest = { ATA_AIO_DMA, { { 0, 0, 0, 0, 0 } } };
903	static const ATARequest g_ataPIORequest = { ATA_AIO_PIO, { { 0, 0, 0, 0, 0 } } };
904	# ifdef IN_RING3
905	static const ATARequest g_ataResetARequest = { ATA_AIO_RESET_ASSERTED, { { 0, 0, 0, 0, 0 } } };
906	static const ATARequest g_ataResetCRequest = { ATA_AIO_RESET_CLEARED, { { 0, 0, 0, 0, 0 } } };
907	# endif
908
909	# ifdef IN_RING3
910	static void ataR3AsyncIOClearRequests(PPDMDEVINS pDevIns, PATACONTROLLER pCtl)
911	{
912	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
913	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
914
915	pCtl->AsyncIOReqHead = 0;
916	pCtl->AsyncIOReqTail = 0;
917
918	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
919	AssertRC(rc);
920	}
921	# endif /* IN_RING3 */
922
923	static void ataHCAsyncIOPutRequest(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, const ATARequest *pReq)
924	{
925	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
926	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
927
928	uint8_t const iAsyncIORequest = pCtl->AsyncIOReqHead % RT_ELEMENTS(pCtl->aAsyncIORequests);
929	Assert((iAsyncIORequest + 1) % RT_ELEMENTS(pCtl->aAsyncIORequests) != pCtl->AsyncIOReqTail);
930	memcpy(&pCtl->aAsyncIORequests[iAsyncIORequest], pReq, sizeof(*pReq));
931	pCtl->AsyncIOReqHead = (iAsyncIORequest + 1) % RT_ELEMENTS(pCtl->aAsyncIORequests);
932
933	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
934	AssertRC(rc);
935
936	rc = PDMDevHlpCritSectScheduleExitEvent(pDevIns, &pCtl->lock, pCtl->hAsyncIOSem);
937	if (RT_FAILURE(rc))
938	{
939	rc = PDMDevHlpSUPSemEventSignal(pDevIns, pCtl->hAsyncIOSem);
940	AssertRC(rc);
941	}
942	}
943
944	# ifdef IN_RING3
945
946	static const ATARequest *ataR3AsyncIOGetCurrentRequest(PPDMDEVINS pDevIns, PATACONTROLLER pCtl)
947	{
948	const ATARequest *pReq;
949
950	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
951	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
952
953	if (pCtl->AsyncIOReqHead != pCtl->AsyncIOReqTail)
954	pReq = &pCtl->aAsyncIORequests[pCtl->AsyncIOReqTail];
955	else
956	pReq = NULL;
957
958	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
959	AssertRC(rc);
960	return pReq;
961	}
962
963
964	/**
965	* Remove the request with the given type, as it's finished. The request
966	* is not removed blindly, as this could mean a RESET request that is not
967	* yet processed (but has cleared the request queue) is lost.
968	*
969	* @param pDevIns The device instance.
970	* @param pCtl Controller for which to remove the request.
971	* @param ReqType Type of the request to remove.
972	*/
973	static void ataR3AsyncIORemoveCurrentRequest(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, ATAAIO ReqType)
974	{
975	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
976	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
977
978	if (pCtl->AsyncIOReqHead != pCtl->AsyncIOReqTail && pCtl->aAsyncIORequests[pCtl->AsyncIOReqTail].ReqType == ReqType)
979	{
980	pCtl->AsyncIOReqTail++;
981	pCtl->AsyncIOReqTail %= RT_ELEMENTS(pCtl->aAsyncIORequests);
982	}
983
984	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
985	AssertRC(rc);
986	}
987
988
989	/**
990	* Dump the request queue for a particular controller. First dump the queue
991	* contents, then the already processed entries, as long as they haven't been
992	* overwritten.
993	*
994	* @param pDevIns The device instance.
995	* @param pCtl Controller for which to dump the queue.
996	*/
997	static void ataR3AsyncIODumpRequests(PPDMDEVINS pDevIns, PATACONTROLLER pCtl)
998	{
999	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
1000	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
1001
1002	LogRel(("PIIX3 ATA: Ctl#%d: request queue dump (topmost is current):\n", pCtl->iCtl));
1003	uint8_t curr = pCtl->AsyncIOReqTail;
1004	do
1005	{
1006	if (curr == pCtl->AsyncIOReqHead)
1007	LogRel(("PIIX3 ATA: Ctl#%d: processed requests (topmost is oldest):\n", pCtl->iCtl));
1008	switch (pCtl->aAsyncIORequests[curr].ReqType)
1009	{
1010	case ATA_AIO_NEW:
1011	LogRel(("new transfer request, iIf=%d iBeginTransfer=%d iSourceSink=%d cbTotalTransfer=%d uTxDir=%d\n",
1012	pCtl->aAsyncIORequests[curr].u.t.iIf, pCtl->aAsyncIORequests[curr].u.t.iBeginTransfer,
1013	pCtl->aAsyncIORequests[curr].u.t.iSourceSink, pCtl->aAsyncIORequests[curr].u.t.cbTotalTransfer,
1014	pCtl->aAsyncIORequests[curr].u.t.uTxDir));
1015	break;
1016	case ATA_AIO_DMA:
1017	LogRel(("dma transfer continuation\n"));
1018	break;
1019	case ATA_AIO_PIO:
1020	LogRel(("pio transfer continuation\n"));
1021	break;
1022	case ATA_AIO_RESET_ASSERTED:
1023	LogRel(("reset asserted request\n"));
1024	break;
1025	case ATA_AIO_RESET_CLEARED:
1026	LogRel(("reset cleared request\n"));
1027	break;
1028	case ATA_AIO_ABORT:
1029	LogRel(("abort request, iIf=%d fResetDrive=%d\n", pCtl->aAsyncIORequests[curr].u.a.iIf,
1030	pCtl->aAsyncIORequests[curr].u.a.fResetDrive));
1031	break;
1032	default:
1033	LogRel(("unknown request %d\n", pCtl->aAsyncIORequests[curr].ReqType));
1034	}
1035	curr = (curr + 1) % RT_ELEMENTS(pCtl->aAsyncIORequests);
1036	} while (curr != pCtl->AsyncIOReqTail);
1037
1038	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
1039	AssertRC(rc);
1040	}
1041
1042
1043	/**
1044	* Checks whether the request queue for a particular controller is empty
1045	* or whether a particular controller is idle.
1046	*
1047	* @param pDevIns The device instance.
1048	* @param pCtl Controller for which to check the queue.
1049	* @param fStrict If set then the controller is checked to be idle.
1050	*/
1051	static bool ataR3AsyncIOIsIdle(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, bool fStrict)
1052	{
1053	int rc = PDMDevHlpCritSectEnter(pDevIns, &pCtl->AsyncIORequestLock, VINF_SUCCESS);
1054	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->AsyncIORequestLock, rc);
1055
1056	bool fIdle = pCtl->fRedoIdle;
1057	if (!fIdle)
1058	fIdle = (pCtl->AsyncIOReqHead == pCtl->AsyncIOReqTail);
1059	if (fStrict)
1060	fIdle &= (pCtl->uAsyncIOState == ATA_AIO_NEW);
1061
1062	rc = PDMDevHlpCritSectLeave(pDevIns, &pCtl->AsyncIORequestLock);
1063	AssertRC(rc);
1064	return fIdle;
1065	}
1066
1067
1068	/**
1069	* Send a transfer request to the async I/O thread.
1070	*
1071	* @param pDevIns The device instance.
1072	* @param pCtl The ATA controller.
1073	* @param s Pointer to the ATA device state data.
1074	* @param cbTotalTransfer Data transfer size.
1075	* @param uTxDir Data transfer direction.
1076	* @param iBeginTransfer Index of BeginTransfer callback.
1077	* @param iSourceSink Index of SourceSink callback.
1078	* @param fChainedTransfer Whether this is a transfer that is part of the previous command/transfer.
1079	*/
1080	static void ataR3StartTransfer(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s,
1081	uint32_t cbTotalTransfer, uint8_t uTxDir, ATAFNBT iBeginTransfer,
1082	ATAFNSS iSourceSink, bool fChainedTransfer)
1083	{
1084	ATARequest Req;
1085
1086	Assert(PDMDevHlpCritSectIsOwner(pDevIns, &pCtl->lock));
1087
1088	/* Do not issue new requests while the RESET line is asserted. */
1089	if (pCtl->fReset)
1090	{
1091	Log2(("%s: Ctl#%d: suppressed new request as RESET is active\n", __FUNCTION__, pCtl->iCtl));
1092	return;
1093	}
1094
1095	/* If the controller is already doing something else right now, ignore
1096	* the command that is being submitted. Some broken guests issue commands
1097	* twice (e.g. the Linux kernel that comes with Acronis True Image 8). */
1098	if (!fChainedTransfer && !ataR3AsyncIOIsIdle(pDevIns, pCtl, true /fStrict/))
1099	{
1100	Log(("%s: Ctl#%d: ignored command %#04x, controller state %d\n", __FUNCTION__, pCtl->iCtl, s->uATARegCommand, pCtl->uAsyncIOState));
1101	LogRel(("PIIX3 IDE: guest issued command %#04x while controller busy\n", s->uATARegCommand));
1102	return;
1103	}
1104
1105	Req.ReqType = ATA_AIO_NEW;
1106	if (fChainedTransfer)
1107	Req.u.t.iIf = pCtl->iAIOIf;
1108	else
1109	Req.u.t.iIf = pCtl->iSelectedIf;
1110	Req.u.t.cbTotalTransfer = cbTotalTransfer;
1111	Req.u.t.uTxDir = uTxDir;
1112	Req.u.t.iBeginTransfer = iBeginTransfer;
1113	Req.u.t.iSourceSink = iSourceSink;
1114	ataSetStatusValue(pCtl, s, ATA_STAT_BUSY);
1115	pCtl->fChainedTransfer = fChainedTransfer;
1116
1117	/*
1118	* Kick the worker thread into action.
1119	*/
1120	Log2(("%s: Ctl#%d: message to async I/O thread, new request\n", __FUNCTION__, pCtl->iCtl));
1121	ataHCAsyncIOPutRequest(pDevIns, pCtl, &Req);
1122	}
1123
1124
1125	/**
1126	* Send an abort command request to the async I/O thread.
1127	*
1128	* @param pDevIns The device instance.
1129	* @param pCtl The ATA controller.
1130	* @param s Pointer to the ATA device state data.
1131	* @param fResetDrive Whether to reset the drive or just abort a command.
1132	*/
1133	static void ataR3AbortCurrentCommand(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, bool fResetDrive)
1134	{
1135	ATARequest Req;
1136
1137	Assert(PDMDevHlpCritSectIsOwner(pDevIns, &pCtl->lock));
1138
1139	/* Do not issue new requests while the RESET line is asserted. */
1140	if (pCtl->fReset)
1141	{
1142	Log2(("%s: Ctl#%d: suppressed aborting command as RESET is active\n", __FUNCTION__, pCtl->iCtl));
1143	return;
1144	}
1145
1146	Req.ReqType = ATA_AIO_ABORT;
1147	Req.u.a.iIf = pCtl->iSelectedIf;
1148	Req.u.a.fResetDrive = fResetDrive;
1149	ataSetStatus(pCtl, s, ATA_STAT_BUSY);
1150	Log2(("%s: Ctl#%d: message to async I/O thread, abort command on LUN#%d\n", __FUNCTION__, pCtl->iCtl, s->iLUN));
1151	ataHCAsyncIOPutRequest(pDevIns, pCtl, &Req);
1152	}
1153
1154	# endif /* IN_RING3 */
1155
1156	/**
1157	* Set the internal interrupt pending status, update INTREQ as appropriate.
1158	*
1159	* @param pDevIns The device instance.
1160	* @param pCtl The ATA controller.
1161	* @param s Pointer to the ATA device state data.
1162	*/
1163	static void ataHCSetIRQ(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s)
1164	{
1165	if (!s->fIrqPending)
1166	{
1167	if (!(s->uATARegDevCtl & ATA_DEVCTL_DISABLE_IRQ))
1168	{
1169	Log2(("%s: LUN#%d asserting IRQ\n", __FUNCTION__, s->iLUN));
1170	/* The BMDMA unit unconditionally sets BM_STATUS_INT if the interrupt
1171	* line is asserted. It monitors the line for a rising edge. */
1172	pCtl->BmDma.u8Status \|= BM_STATUS_INT;
1173	/* Only actually set the IRQ line if updating the currently selected drive. */
1174	if (s == &pCtl->aIfs[pCtl->iSelectedIf & ATA_SELECTED_IF_MASK])
1175	{
1176	/** @todo experiment with adaptive IRQ delivery: for reads it is
1177	* better to wait for IRQ delivery, as it reduces latency. */
1178	if (pCtl->irq == 16)
1179	PDMDevHlpPCISetIrq(pDevIns, 0, 1);
1180	else
1181	PDMDevHlpISASetIrq(pDevIns, pCtl->irq, 1);
1182	}
1183	}
1184	s->fIrqPending = true;
1185	}
1186	}
1187
1188	#endif /* IN_RING0 \|\| IN_RING3 */
1189
1190	/**
1191	* Clear the internal interrupt pending status, update INTREQ as appropriate.
1192	*
1193	* @param pDevIns The device instance.
1194	* @param pCtl The ATA controller.
1195	* @param s Pointer to the ATA device state data.
1196	*/
1197	static void ataUnsetIRQ(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s)
1198	{
1199	if (s->fIrqPending)
1200	{
1201	if (!(s->uATARegDevCtl & ATA_DEVCTL_DISABLE_IRQ))
1202	{
1203	Log2(("%s: LUN#%d deasserting IRQ\n", __FUNCTION__, s->iLUN));
1204	/* Only actually unset the IRQ line if updating the currently selected drive. */
1205	if (s == &pCtl->aIfs[pCtl->iSelectedIf & ATA_SELECTED_IF_MASK])
1206	{
1207	if (pCtl->irq == 16)
1208	PDMDevHlpPCISetIrq(pDevIns, 0, 0);
1209	else
1210	PDMDevHlpISASetIrq(pDevIns, pCtl->irq, 0);
1211	}
1212	}
1213	s->fIrqPending = false;
1214	}
1215	}
1216
1217	#if defined(IN_RING0) \|\| defined(IN_RING3)
1218
1219	static void ataHCPIOTransferStart(PATACONTROLLER pCtl, PATADEVSTATE s, uint32_t start, uint32_t size)
1220	{
1221	Log2(("%s: LUN#%d start %d size %d\n", __FUNCTION__, s->iLUN, start, size));
1222	s->iIOBufferPIODataStart = start;
1223	s->iIOBufferPIODataEnd = start + size;
1224	ataSetStatus(pCtl, s, ATA_STAT_DRQ \| ATA_STAT_SEEK);
1225	ataUnsetStatus(pCtl, s, ATA_STAT_BUSY);
1226	}
1227
1228
1229	static void ataHCPIOTransferStop(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s)
1230	{
1231	Log2(("%s: LUN#%d\n", __FUNCTION__, s->iLUN));
1232	if (s->fATAPITransfer)
1233	{
1234	s->uATARegNSector = (s->uATARegNSector & ~7) \| ATAPI_INT_REASON_IO \| ATAPI_INT_REASON_CD;
1235	Log2(("%s: interrupt reason %#04x\n", __FUNCTION__, s->uATARegNSector));
1236	ataHCSetIRQ(pDevIns, pCtl, s);
1237	s->fATAPITransfer = false;
1238	}
1239	s->cbTotalTransfer = 0;
1240	s->cbElementaryTransfer = 0;
1241	s->iIOBufferPIODataStart = 0;
1242	s->iIOBufferPIODataEnd = 0;
1243	s->iBeginTransfer = ATAFN_BT_NULL;
1244	s->iSourceSink = ATAFN_SS_NULL;
1245	}
1246
1247
1248	static void ataHCPIOTransferLimitATAPI(PATADEVSTATE s)
1249	{
1250	uint32_t cbLimit, cbTransfer;
1251
1252	cbLimit = s->cbPIOTransferLimit;
1253	/* Use maximum transfer size if the guest requested 0. Avoids a hang. */
1254	if (cbLimit == 0)
1255	cbLimit = 0xfffe;
1256	Log2(("%s: byte count limit=%d\n", __FUNCTION__, cbLimit));
1257	if (cbLimit == 0xffff)
1258	cbLimit--;
1259	cbTransfer = RT_MIN(s->cbTotalTransfer, s->iIOBufferEnd - s->iIOBufferCur);
1260	if (cbTransfer > cbLimit)
1261	{
1262	/* Byte count limit for clipping must be even in this case */
1263	if (cbLimit & 1)
1264	cbLimit--;
1265	cbTransfer = cbLimit;
1266	}
1267	s->uATARegLCyl = cbTransfer;
1268	s->uATARegHCyl = cbTransfer >> 8;
1269	s->cbElementaryTransfer = cbTransfer;
1270	}
1271
1272	# ifdef IN_RING3
1273
1274	/**
1275	* Enters the lock protecting the controller data against concurrent access.
1276	*
1277	* @param pDevIns The device instance.
1278	* @param pCtl The controller to lock.
1279	*/
1280	DECLINLINE(void) ataR3LockEnter(PPDMDEVINS pDevIns, PATACONTROLLER pCtl)
1281	{
1282	STAM_PROFILE_START(&pCtl->StatLockWait, a);
1283	int const rcLock = PDMDevHlpCritSectEnter(pDevIns, &pCtl->lock, VINF_SUCCESS);
1284	PDM_CRITSECT_RELEASE_ASSERT_RC_DEV(pDevIns, &pCtl->lock, rcLock);
1285	STAM_PROFILE_STOP(&pCtl->StatLockWait, a);
1286	}
1287
1288	/**
1289	* Leaves the lock protecting the controller against concurrent data access.
1290	*
1291	* @param pDevIns The device instance.
1292	* @param pCtl The controller to unlock.
1293	*/
1294	DECLINLINE(void) ataR3LockLeave(PPDMDEVINS pDevIns, PATACONTROLLER pCtl)
1295	{
1296	PDMDevHlpCritSectLeave(pDevIns, &pCtl->lock);
1297	}
1298
1299	static uint32_t ataR3GetNSectors(PATADEVSTATE s)
1300	{
1301	/* 0 means either 256 (LBA28) or 65536 (LBA48) sectors. */
1302	if (s->fLBA48)
1303	{
1304	if (!s->uATARegNSector && !s->uATARegNSectorHOB)
1305	return 65536;
1306	else
1307	return s->uATARegNSectorHOB << 8 \| s->uATARegNSector;
1308	}
1309	else
1310	{
1311	if (!s->uATARegNSector)
1312	return 256;
1313	else
1314	return s->uATARegNSector;
1315	}
1316	}
1317
1318
1319	static void ataR3PadString(uint8_t pbDst, const char pbSrc, uint32_t cbSize)
1320	{
1321	for (uint32_t i = 0; i < cbSize; i++)
1322	{
1323	if (*pbSrc)
1324	pbDst[i ^ 1] = *pbSrc++;
1325	else
1326	pbDst[i ^ 1] = ' ';
1327	}
1328	}
1329
1330
1331	#if 0 /* unused */
1332	/**
1333	* Compares two MSF values.
1334	*
1335	* @returns 1 if the first value is greater than the second value.
1336	* 0 if both are equal
1337	* -1 if the first value is smaller than the second value.
1338	*/
1339	DECLINLINE(int) atapiCmpMSF(const uint8_t pbMSF1, const uint8_t pbMSF2)
1340	{
1341	int iRes = 0;
1342
1343	for (unsigned i = 0; i < 3; i++)
1344	{
1345	if (pbMSF1[i] < pbMSF2[i])
1346	{
1347	iRes = -1;
1348	break;
1349	}
1350	else if (pbMSF1[i] > pbMSF2[i])
1351	{
1352	iRes = 1;
1353	break;
1354	}
1355	}
1356
1357	return iRes;
1358	}
1359	#endif /* unused */
1360
1361	static void ataR3CmdOK(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t status)
1362	{
1363	s->uATARegError = 0; /* Not needed by ATA spec, but cannot hurt. */
1364	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| status);
1365	}
1366
1367
1368	static void ataR3CmdError(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t uErrorCode)
1369	{
1370	Log(("%s: code=%#x\n", __FUNCTION__, uErrorCode));
1371	Assert(uErrorCode);
1372	s->uATARegError = uErrorCode;
1373	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| ATA_STAT_SEEK \| ATA_STAT_ERR);
1374	s->cbTotalTransfer = 0;
1375	s->cbElementaryTransfer = 0;
1376	s->iIOBufferCur = 0;
1377	s->iIOBufferEnd = 0;
1378	s->uTxDir = PDMMEDIATXDIR_NONE;
1379	s->iBeginTransfer = ATAFN_BT_NULL;
1380	s->iSourceSink = ATAFN_SS_NULL;
1381	}
1382
1383	static uint32_t ataR3Checksum(void* ptr, size_t count)
1384	{
1385	uint8_t u8Sum = 0xa5, p = (uint8_t)ptr;
1386	size_t i;
1387
1388	for (i = 0; i < count; i++)
1389	{
1390	u8Sum += *p++;
1391	}
1392
1393	return (uint8_t)-(int32_t)u8Sum;
1394	}
1395
1396	/**
1397	* Sink/Source: IDENTIFY
1398	*/
1399	static bool ataR3IdentifySS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
1400	{
1401	uint16_t *p;
1402	RT_NOREF(pDevIns);
1403
1404	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
1405	Assert(s->cbElementaryTransfer == 512);
1406
1407	p = (uint16_t *)&s->abIOBuffer[0];
1408	memset(p, 0, 512);
1409	p[0] = RT_H2LE_U16(0x0040);
1410	p[1] = RT_H2LE_U16(RT_MIN(s->PCHSGeometry.cCylinders, 16383));
1411	p[3] = RT_H2LE_U16(s->PCHSGeometry.cHeads);
1412	/* Block size; obsolete, but required for the BIOS. */
1413	p[5] = RT_H2LE_U16(s->cbSector);
1414	p[6] = RT_H2LE_U16(s->PCHSGeometry.cSectors);
1415	ataR3PadString((uint8_t )(p + 10), s->szSerialNumber, ATA_SERIAL_NUMBER_LENGTH); / serial number */
1416	p[20] = RT_H2LE_U16(3); /* XXX: retired, cache type */
1417	p[21] = RT_H2LE_U16(512); /* XXX: retired, cache size in sectors */
1418	p[22] = RT_H2LE_U16(0); /* ECC bytes per sector */
1419	ataR3PadString((uint8_t )(p + 23), s->szFirmwareRevision, ATA_FIRMWARE_REVISION_LENGTH); / firmware version */
1420	ataR3PadString((uint8_t )(p + 27), s->szModelNumber, ATA_MODEL_NUMBER_LENGTH); / model */
1421	# if ATA_MAX_MULT_SECTORS > 1
1422	p[47] = RT_H2LE_U16(0x8000 \| ATA_MAX_MULT_SECTORS);
1423	# endif
1424	p[48] = RT_H2LE_U16(1); /* dword I/O, used by the BIOS */
1425	p[49] = RT_H2LE_U16(1 << 11 \| 1 << 9 \| 1 << 8); /* DMA and LBA supported */
1426	p[50] = RT_H2LE_U16(1 << 14); /* No drive specific standby timer minimum */
1427	p[51] = RT_H2LE_U16(240); /* PIO transfer cycle */
1428	p[52] = RT_H2LE_U16(240); /* DMA transfer cycle */
1429	p[53] = RT_H2LE_U16(1 \| 1 << 1 \| 1 << 2); /* words 54-58,64-70,88 valid */
1430	p[54] = RT_H2LE_U16(RT_MIN(s->XCHSGeometry.cCylinders, 16383));
1431	p[55] = RT_H2LE_U16(s->XCHSGeometry.cHeads);
1432	p[56] = RT_H2LE_U16(s->XCHSGeometry.cSectors);
1433	p[57] = RT_H2LE_U16( RT_MIN(s->XCHSGeometry.cCylinders, 16383)
1434	* s->XCHSGeometry.cHeads
1435	* s->XCHSGeometry.cSectors);
1436	p[58] = RT_H2LE_U16( RT_MIN(s->XCHSGeometry.cCylinders, 16383)
1437	* s->XCHSGeometry.cHeads
1438	* s->XCHSGeometry.cSectors >> 16);
1439	if (s->cMultSectors)
1440	p[59] = RT_H2LE_U16(0x100 \| s->cMultSectors);
1441	if (s->cTotalSectors <= (1 << 28) - 1)
1442	{
1443	p[60] = RT_H2LE_U16(s->cTotalSectors);
1444	p[61] = RT_H2LE_U16(s->cTotalSectors >> 16);
1445	}
1446	else
1447	{
1448	/* Report maximum number of sectors possible with LBA28 */
1449	p[60] = RT_H2LE_U16(((1 << 28) - 1) & 0xffff);
1450	p[61] = RT_H2LE_U16(((1 << 28) - 1) >> 16);
1451	}
1452	p[63] = RT_H2LE_U16(ATA_TRANSFER_ID(ATA_MODE_MDMA, ATA_MDMA_MODE_MAX, s->uATATransferMode)); /* MDMA modes supported / mode enabled */
1453	p[64] = RT_H2LE_U16(ATA_PIO_MODE_MAX > 2 ? (1 << (ATA_PIO_MODE_MAX - 2)) - 1 : 0); /* PIO modes beyond PIO2 supported */
1454	p[65] = RT_H2LE_U16(120); /* minimum DMA multiword tx cycle time */
1455	p[66] = RT_H2LE_U16(120); /* recommended DMA multiword tx cycle time */
1456	p[67] = RT_H2LE_U16(120); /* minimum PIO cycle time without flow control */
1457	p[68] = RT_H2LE_U16(120); /* minimum PIO cycle time with IORDY flow control */
1458	if ( pDevR3->pDrvMedia->pfnDiscard
1459	\|\| s->cbSector != 512
1460	\|\| pDevR3->pDrvMedia->pfnIsNonRotational(pDevR3->pDrvMedia))
1461	{
1462	p[80] = RT_H2LE_U16(0x1f0); /* support everything up to ATA/ATAPI-8 ACS */
1463	p[81] = RT_H2LE_U16(0x28); /* conforms to ATA/ATAPI-8 ACS */
1464	}
1465	else
1466	{
1467	p[80] = RT_H2LE_U16(0x7e); /* support everything up to ATA/ATAPI-6 */
1468	p[81] = RT_H2LE_U16(0x22); /* conforms to ATA/ATAPI-6 */
1469	}
1470	p[82] = RT_H2LE_U16(1 << 3 \| 1 << 5 \| 1 << 6); /* supports power management, write cache and look-ahead */
1471	if (s->cTotalSectors <= (1 << 28) - 1)
1472	p[83] = RT_H2LE_U16(1 << 14 \| 1 << 12); /* supports FLUSH CACHE */
1473	else
1474	p[83] = RT_H2LE_U16(1 << 14 \| 1 << 10 \| 1 << 12 \| 1 << 13); /* supports LBA48, FLUSH CACHE and FLUSH CACHE EXT */
1475	p[84] = RT_H2LE_U16(1 << 14);
1476	p[85] = RT_H2LE_U16(1 << 3 \| 1 << 5 \| 1 << 6); /* enabled power management, write cache and look-ahead */
1477	if (s->cTotalSectors <= (1 << 28) - 1)
1478	p[86] = RT_H2LE_U16(1 << 12); /* enabled FLUSH CACHE */
1479	else
1480	p[86] = RT_H2LE_U16(1 << 10 \| 1 << 12 \| 1 << 13); /* enabled LBA48, FLUSH CACHE and FLUSH CACHE EXT */
1481	p[87] = RT_H2LE_U16(1 << 14);
1482	p[88] = RT_H2LE_U16(ATA_TRANSFER_ID(ATA_MODE_UDMA, ATA_UDMA_MODE_MAX, s->uATATransferMode)); /* UDMA modes supported / mode enabled */
1483	p[93] = RT_H2LE_U16((1 \| 1 << 1) << ((s->iLUN & 1) == 0 ? 0 : 8) \| 1 << 13 \| 1 << 14);
1484	if (s->cTotalSectors > (1 << 28) - 1)
1485	{
1486	p[100] = RT_H2LE_U16(s->cTotalSectors);
1487	p[101] = RT_H2LE_U16(s->cTotalSectors >> 16);
1488	p[102] = RT_H2LE_U16(s->cTotalSectors >> 32);
1489	p[103] = RT_H2LE_U16(s->cTotalSectors >> 48);
1490	}
1491
1492	if (s->cbSector != 512)
1493	{
1494	uint32_t cSectorSizeInWords = s->cbSector / sizeof(uint16_t);
1495	/* Enable reporting of logical sector size. */
1496	p[106] \|= RT_H2LE_U16(RT_BIT(12) \| RT_BIT(14));
1497	p[117] = RT_H2LE_U16(cSectorSizeInWords);
1498	p[118] = RT_H2LE_U16(cSectorSizeInWords >> 16);
1499	}
1500
1501	if (pDevR3->pDrvMedia->pfnDiscard) /** @todo Set bit 14 in word 69 too? (Deterministic read after TRIM). */
1502	p[169] = RT_H2LE_U16(1); /* DATA SET MANAGEMENT command supported. */
1503	if (pDevR3->pDrvMedia->pfnIsNonRotational(pDevR3->pDrvMedia))
1504	p[217] = RT_H2LE_U16(1); /* Non-rotational medium */
1505	uint32_t uCsum = ataR3Checksum(p, 510);
1506	p[255] = RT_H2LE_U16(0xa5 \| (uCsum << 8)); /* Integrity word */
1507	s->iSourceSink = ATAFN_SS_NULL;
1508	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
1509	return false;
1510	}
1511
1512
1513	/**
1514	* Sink/Source: FLUSH
1515	*/
1516	static bool ataR3FlushSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
1517	{
1518	int rc;
1519
1520	Assert(s->uTxDir == PDMMEDIATXDIR_NONE);
1521	Assert(!s->cbElementaryTransfer);
1522
1523	ataR3LockLeave(pDevIns, pCtl);
1524
1525	STAM_PROFILE_START(&s->StatFlushes, f);
1526	rc = pDevR3->pDrvMedia->pfnFlush(pDevR3->pDrvMedia);
1527	AssertRC(rc);
1528	STAM_PROFILE_STOP(&s->StatFlushes, f);
1529
1530	ataR3LockEnter(pDevIns, pCtl);
1531	ataR3CmdOK(pCtl, s, 0);
1532	return false;
1533	}
1534
1535	/**
1536	* Sink/Source: ATAPI IDENTIFY
1537	*/
1538	static bool atapiR3IdentifySS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
1539	{
1540	uint16_t *p;
1541	RT_NOREF(pDevIns, pDevR3);
1542
1543	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
1544	Assert(s->cbElementaryTransfer == 512);
1545
1546	p = (uint16_t *)&s->abIOBuffer[0];
1547	memset(p, 0, 512);
1548	/* Removable CDROM, 3ms response, 12 byte packets */
1549	p[0] = RT_H2LE_U16(2 << 14 \| 5 << 8 \| 1 << 7 \| 0 << 5 \| 0 << 0);
1550	ataR3PadString((uint8_t )(p + 10), s->szSerialNumber, ATA_SERIAL_NUMBER_LENGTH); / serial number */
1551	p[20] = RT_H2LE_U16(3); /* XXX: retired, cache type */
1552	p[21] = RT_H2LE_U16(512); /* XXX: retired, cache size in sectors */
1553	ataR3PadString((uint8_t )(p + 23), s->szFirmwareRevision, ATA_FIRMWARE_REVISION_LENGTH); / firmware version */
1554	ataR3PadString((uint8_t )(p + 27), s->szModelNumber, ATA_MODEL_NUMBER_LENGTH); / model */
1555	p[49] = RT_H2LE_U16(1 << 11 \| 1 << 9 \| 1 << 8); /* DMA and LBA supported */
1556	p[50] = RT_H2LE_U16(1 << 14); /* No drive specific standby timer minimum */
1557	p[51] = RT_H2LE_U16(240); /* PIO transfer cycle */
1558	p[52] = RT_H2LE_U16(240); /* DMA transfer cycle */
1559	p[53] = RT_H2LE_U16(1 << 1 \| 1 << 2); /* words 64-70,88 are valid */
1560	p[63] = RT_H2LE_U16(ATA_TRANSFER_ID(ATA_MODE_MDMA, ATA_MDMA_MODE_MAX, s->uATATransferMode)); /* MDMA modes supported / mode enabled */
1561	p[64] = RT_H2LE_U16(ATA_PIO_MODE_MAX > 2 ? (1 << (ATA_PIO_MODE_MAX - 2)) - 1 : 0); /* PIO modes beyond PIO2 supported */
1562	p[65] = RT_H2LE_U16(120); /* minimum DMA multiword tx cycle time */
1563	p[66] = RT_H2LE_U16(120); /* recommended DMA multiword tx cycle time */
1564	p[67] = RT_H2LE_U16(120); /* minimum PIO cycle time without flow control */
1565	p[68] = RT_H2LE_U16(120); /* minimum PIO cycle time with IORDY flow control */
1566	p[73] = RT_H2LE_U16(0x003e); /* ATAPI CDROM major */
1567	p[74] = RT_H2LE_U16(9); /* ATAPI CDROM minor */
1568	p[75] = RT_H2LE_U16(1); /* queue depth 1 */
1569	p[80] = RT_H2LE_U16(0x7e); /* support everything up to ATA/ATAPI-6 */
1570	p[81] = RT_H2LE_U16(0x22); /* conforms to ATA/ATAPI-6 */
1571	p[82] = RT_H2LE_U16(1 << 4 \| 1 << 9); /* supports packet command set and DEVICE RESET */
1572	p[83] = RT_H2LE_U16(1 << 14);
1573	p[84] = RT_H2LE_U16(1 << 14);
1574	p[85] = RT_H2LE_U16(1 << 4 \| 1 << 9); /* enabled packet command set and DEVICE RESET */
1575	p[86] = RT_H2LE_U16(0);
1576	p[87] = RT_H2LE_U16(1 << 14);
1577	p[88] = RT_H2LE_U16(ATA_TRANSFER_ID(ATA_MODE_UDMA, ATA_UDMA_MODE_MAX, s->uATATransferMode)); /* UDMA modes supported / mode enabled */
1578	p[93] = RT_H2LE_U16((1 \| 1 << 1) << ((s->iLUN & 1) == 0 ? 0 : 8) \| 1 << 13 \| 1 << 14);
1579	/* According to ATAPI-5 spec:
1580	*
1581	* The use of this word is optional.
1582	* If bits 7:0 of this word contain the signature A5h, bits 15:8
1583	* contain the data
1584	* structure checksum.
1585	* The data structure checksum is the twos complement of the sum of
1586	* all bytes in words 0 through 254 and the byte consisting of
1587	* bits 7:0 in word 255.
1588	* Each byte shall be added with unsigned arithmetic,
1589	* and overflow shall be ignored.
1590	* The sum of all 512 bytes is zero when the checksum is correct.
1591	*/
1592	uint32_t uCsum = ataR3Checksum(p, 510);
1593	p[255] = RT_H2LE_U16(0xa5 \| (uCsum << 8)); /* Integrity word */
1594
1595	s->iSourceSink = ATAFN_SS_NULL;
1596	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
1597	return false;
1598	}
1599
1600
1601	static void ataR3SetSignature(PATADEVSTATE s)
1602	{
1603	s->uATARegSelect &= 0xf0; /* clear head */
1604	/* put signature */
1605	s->uATARegNSector = 1;
1606	s->uATARegSector = 1;
1607	if (s->fATAPI)
1608	{
1609	s->uATARegLCyl = 0x14;
1610	s->uATARegHCyl = 0xeb;
1611	}
1612	else
1613	{
1614	s->uATARegLCyl = 0;
1615	s->uATARegHCyl = 0;
1616	}
1617	}
1618
1619
1620	static uint64_t ataR3GetSector(PATADEVSTATE s)
1621	{
1622	uint64_t iLBA;
1623	if (s->uATARegSelect & 0x40)
1624	{
1625	/* any LBA variant */
1626	if (s->fLBA48)
1627	{
1628	/* LBA48 */
1629	iLBA = ((uint64_t)s->uATARegHCylHOB << 40)
1630	\| ((uint64_t)s->uATARegLCylHOB << 32)
1631	\| ((uint64_t)s->uATARegSectorHOB << 24)
1632	\| ((uint64_t)s->uATARegHCyl << 16)
1633	\| ((uint64_t)s->uATARegLCyl << 8)
1634	\| s->uATARegSector;
1635	}
1636	else
1637	{
1638	/* LBA */
1639	iLBA = ((uint32_t)(s->uATARegSelect & 0x0f) << 24)
1640	\| ((uint32_t)s->uATARegHCyl << 16)
1641	\| ((uint32_t)s->uATARegLCyl << 8)
1642	\| s->uATARegSector;
1643	}
1644	}
1645	else
1646	{
1647	/* CHS */
1648	iLBA = (((uint32_t)s->uATARegHCyl << 8) \| s->uATARegLCyl) * s->XCHSGeometry.cHeads * s->XCHSGeometry.cSectors
1649	+ (s->uATARegSelect & 0x0f) * s->XCHSGeometry.cSectors
1650	+ (s->uATARegSector - 1);
1651	LogFlowFunc(("CHS %u/%u/%u -> LBA %llu\n", ((uint32_t)s->uATARegHCyl << 8) \| s->uATARegLCyl, s->uATARegSelect & 0x0f, s->uATARegSector, iLBA));
1652	}
1653	return iLBA;
1654	}
1655
1656	static void ataR3SetSector(PATADEVSTATE s, uint64_t iLBA)
1657	{
1658	uint32_t cyl, r;
1659	if (s->uATARegSelect & 0x40)
1660	{
1661	/* any LBA variant */
1662	if (s->fLBA48)
1663	{
1664	/* LBA48 */
1665	s->uATARegHCylHOB = iLBA >> 40;
1666	s->uATARegLCylHOB = iLBA >> 32;
1667	s->uATARegSectorHOB = iLBA >> 24;
1668	s->uATARegHCyl = iLBA >> 16;
1669	s->uATARegLCyl = iLBA >> 8;
1670	s->uATARegSector = iLBA;
1671	}
1672	else
1673	{
1674	/* LBA */
1675	s->uATARegSelect = (s->uATARegSelect & 0xf0) \| (iLBA >> 24);
1676	s->uATARegHCyl = (iLBA >> 16);
1677	s->uATARegLCyl = (iLBA >> 8);
1678	s->uATARegSector = (iLBA);
1679	}
1680	}
1681	else
1682	{
1683	/* CHS */
1684	AssertMsgReturnVoid(s->XCHSGeometry.cHeads && s->XCHSGeometry.cSectors, ("Device geometry not set!\n"));
1685	cyl = iLBA / (s->XCHSGeometry.cHeads * s->XCHSGeometry.cSectors);
1686	r = iLBA % (s->XCHSGeometry.cHeads * s->XCHSGeometry.cSectors);
1687	s->uATARegHCyl = cyl >> 8;
1688	s->uATARegLCyl = cyl;
1689	s->uATARegSelect = (s->uATARegSelect & 0xf0) \| ((r / s->XCHSGeometry.cSectors) & 0x0f);
1690	s->uATARegSector = (r % s->XCHSGeometry.cSectors) + 1;
1691	LogFlowFunc(("LBA %llu -> CHS %u/%u/%u\n", iLBA, cyl, s->uATARegSelect & 0x0f, s->uATARegSector));
1692	}
1693	}
1694
1695
1696	static void ataR3WarningDiskFull(PPDMDEVINS pDevIns)
1697	{
1698	int rc;
1699	LogRel(("PIIX3 ATA: Host disk full\n"));
1700	rc = PDMDevHlpVMSetRuntimeError(pDevIns, VMSETRTERR_FLAGS_SUSPEND \| VMSETRTERR_FLAGS_NO_WAIT, "DevATA_DISKFULL",
1701	N_("Host system reported disk full. VM execution is suspended. You can resume after freeing some space"));
1702	AssertRC(rc);
1703	}
1704
1705	static void ataR3WarningFileTooBig(PPDMDEVINS pDevIns)
1706	{
1707	int rc;
1708	LogRel(("PIIX3 ATA: File too big\n"));
1709	rc = PDMDevHlpVMSetRuntimeError(pDevIns, VMSETRTERR_FLAGS_SUSPEND \| VMSETRTERR_FLAGS_NO_WAIT, "DevATA_FILETOOBIG",
1710	N_("Host system reported that the file size limit of the host file system has been exceeded. VM execution is suspended. You need to move your virtual hard disk to a filesystem which allows bigger files"));
1711	AssertRC(rc);
1712	}
1713
1714	static void ataR3WarningISCSI(PPDMDEVINS pDevIns)
1715	{
1716	int rc;
1717	LogRel(("PIIX3 ATA: iSCSI target unavailable\n"));
1718	rc = PDMDevHlpVMSetRuntimeError(pDevIns, VMSETRTERR_FLAGS_SUSPEND \| VMSETRTERR_FLAGS_NO_WAIT, "DevATA_ISCSIDOWN",
1719	N_("The iSCSI target has stopped responding. VM execution is suspended. You can resume when it is available again"));
1720	AssertRC(rc);
1721	}
1722
1723	static void ataR3WarningFileStale(PPDMDEVINS pDevIns)
1724	{
1725	int rc;
1726	LogRel(("PIIX3 ATA: File handle became stale\n"));
1727	rc = PDMDevHlpVMSetRuntimeError(pDevIns, VMSETRTERR_FLAGS_SUSPEND \| VMSETRTERR_FLAGS_NO_WAIT, "DevATA_FILESTALE",
1728	N_("The file became stale (often due to a restarted NFS server). VM execution is suspended. You can resume when it is available again"));
1729	AssertRC(rc);
1730	}
1731
1732
1733	static bool ataR3IsRedoSetWarning(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, int rc)
1734	{
1735	Assert(!PDMDevHlpCritSectIsOwner(pDevIns, &pCtl->lock));
1736	if (rc == VERR_DISK_FULL)
1737	{
1738	pCtl->fRedoIdle = true;
1739	ataR3WarningDiskFull(pDevIns);
1740	return true;
1741	}
1742	if (rc == VERR_FILE_TOO_BIG)
1743	{
1744	pCtl->fRedoIdle = true;
1745	ataR3WarningFileTooBig(pDevIns);
1746	return true;
1747	}
1748	if (rc == VERR_BROKEN_PIPE \|\| rc == VERR_NET_CONNECTION_REFUSED)
1749	{
1750	pCtl->fRedoIdle = true;
1751	/* iSCSI connection abort (first error) or failure to reestablish
1752	* connection (second error). Pause VM. On resume we'll retry. */
1753	ataR3WarningISCSI(pDevIns);
1754	return true;
1755	}
1756	if (rc == VERR_STALE_FILE_HANDLE)
1757	{
1758	pCtl->fRedoIdle = true;
1759	ataR3WarningFileStale(pDevIns);
1760	return true;
1761	}
1762	if (rc == VERR_VD_DEK_MISSING)
1763	{
1764	/* Error message already set. */
1765	pCtl->fRedoIdle = true;
1766	return true;
1767	}
1768
1769	return false;
1770	}
1771
1772
1773	static int ataR3ReadSectors(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3,
1774	uint64_t u64Sector, void pvBuf, uint32_t cSectors, bool pfRedo)
1775	{
1776	int rc;
1777	uint32_t const cbSector = s->cbSector;
1778	uint32_t cbToRead = cSectors * cbSector;
1779	Assert(pvBuf == &s->abIOBuffer[0]);
1780	AssertReturnStmt(cbToRead <= sizeof(s->abIOBuffer), *pfRedo = false, VERR_BUFFER_OVERFLOW);
1781
1782	ataR3LockLeave(pDevIns, pCtl);
1783
1784	STAM_PROFILE_ADV_START(&s->StatReads, r);
1785	s->Led.Asserted.s.fReading = s->Led.Actual.s.fReading = 1;
1786	rc = pDevR3->pDrvMedia->pfnRead(pDevR3->pDrvMedia, u64Sector * cbSector, pvBuf, cbToRead);
1787	s->Led.Actual.s.fReading = 0;
1788	STAM_PROFILE_ADV_STOP(&s->StatReads, r);
1789	Log4(("ataR3ReadSectors: rc=%Rrc cSectors=%#x u64Sector=%llu\n%.*Rhxd\n",
1790	rc, cSectors, u64Sector, cbToRead, pvBuf));
1791
1792	STAM_REL_COUNTER_ADD(&s->StatBytesRead, cbToRead);
1793
1794	if (RT_SUCCESS(rc))
1795	*pfRedo = false;
1796	else
1797	*pfRedo = ataR3IsRedoSetWarning(pDevIns, pCtl, rc);
1798
1799	ataR3LockEnter(pDevIns, pCtl);
1800	return rc;
1801	}
1802
1803
1804	static int ataR3WriteSectors(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3,
1805	uint64_t u64Sector, const void pvBuf, uint32_t cSectors, bool pfRedo)
1806	{
1807	int rc;
1808	uint32_t const cbSector = s->cbSector;
1809	uint32_t cbToWrite = cSectors * cbSector;
1810	Assert(pvBuf == &s->abIOBuffer[0]);
1811	AssertReturnStmt(cbToWrite <= sizeof(s->abIOBuffer), *pfRedo = false, VERR_BUFFER_OVERFLOW);
1812
1813	ataR3LockLeave(pDevIns, pCtl);
1814
1815	STAM_PROFILE_ADV_START(&s->StatWrites, w);
1816	s->Led.Asserted.s.fWriting = s->Led.Actual.s.fWriting = 1;
1817	# ifdef VBOX_INSTRUMENT_DMA_WRITES
1818	if (s->fDMA)
1819	STAM_PROFILE_ADV_START(&s->StatInstrVDWrites, vw);
1820	# endif
1821	rc = pDevR3->pDrvMedia->pfnWrite(pDevR3->pDrvMedia, u64Sector * cbSector, pvBuf, cbToWrite);
1822	# ifdef VBOX_INSTRUMENT_DMA_WRITES
1823	if (s->fDMA)
1824	STAM_PROFILE_ADV_STOP(&s->StatInstrVDWrites, vw);
1825	# endif
1826	s->Led.Actual.s.fWriting = 0;
1827	STAM_PROFILE_ADV_STOP(&s->StatWrites, w);
1828	Log4(("ataR3WriteSectors: rc=%Rrc cSectors=%#x u64Sector=%llu\n%.*Rhxd\n",
1829	rc, cSectors, u64Sector, cbToWrite, pvBuf));
1830
1831	STAM_REL_COUNTER_ADD(&s->StatBytesWritten, cbToWrite);
1832
1833	if (RT_SUCCESS(rc))
1834	*pfRedo = false;
1835	else
1836	*pfRedo = ataR3IsRedoSetWarning(pDevIns, pCtl, rc);
1837
1838	ataR3LockEnter(pDevIns, pCtl);
1839	return rc;
1840	}
1841
1842
1843	/**
1844	* Begin Transfer: READ/WRITE SECTORS
1845	*/
1846	static void ataR3ReadWriteSectorsBT(PATACONTROLLER pCtl, PATADEVSTATE s)
1847	{
1848	uint32_t const cbSector = RT_MAX(s->cbSector, 1);
1849	uint32_t cSectors;
1850
1851	cSectors = s->cbTotalTransfer / cbSector;
1852	if (cSectors > s->cSectorsPerIRQ)
1853	s->cbElementaryTransfer = s->cSectorsPerIRQ * cbSector;
1854	else
1855	s->cbElementaryTransfer = cSectors * cbSector;
1856	if (s->uTxDir == PDMMEDIATXDIR_TO_DEVICE)
1857	ataR3CmdOK(pCtl, s, 0);
1858	}
1859
1860
1861	/**
1862	* Sink/Source: READ SECTORS
1863	*/
1864	static bool ataR3ReadSectorsSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
1865	{
1866	uint32_t const cbSector = RT_MAX(s->cbSector, 1);
1867	uint32_t cSectors;
1868	uint64_t iLBA;
1869	bool fRedo;
1870	int rc;
1871
1872	cSectors = s->cbElementaryTransfer / cbSector;
1873	Assert(cSectors);
1874	iLBA = s->iCurLBA;
1875	Log(("%s: %d sectors at LBA %d\n", __FUNCTION__, cSectors, iLBA));
1876	rc = ataR3ReadSectors(pDevIns, pCtl, s, pDevR3, iLBA, s->abIOBuffer, cSectors, &fRedo);
1877	if (RT_SUCCESS(rc))
1878	{
1879	/* When READ SECTORS etc. finishes, the address in the task
1880	* file register points at the last sector read, not at the next
1881	* sector that would be read. This ensures the registers always
1882	* contain a valid sector address.
1883	*/
1884	if (s->cbElementaryTransfer == s->cbTotalTransfer)
1885	{
1886	s->iSourceSink = ATAFN_SS_NULL;
1887	ataR3SetSector(s, iLBA + cSectors - 1);
1888	}
1889	else
1890	ataR3SetSector(s, iLBA + cSectors);
1891	s->uATARegNSector -= cSectors;
1892	s->iCurLBA += cSectors;
1893	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
1894	}
1895	else
1896	{
1897	if (fRedo)
1898	return fRedo;
1899	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
1900	LogRel(("PIIX3 ATA: LUN#%d: disk read error (rc=%Rrc iSector=%#RX64 cSectors=%#RX32)\n",
1901	s->iLUN, rc, iLBA, cSectors));
1902
1903	/*
1904	* Check if we got interrupted. We don't need to set status variables
1905	* because the request was aborted.
1906	*/
1907	if (rc != VERR_INTERRUPTED)
1908	ataR3CmdError(pCtl, s, ID_ERR);
1909	}
1910	return false;
1911	}
1912
1913
1914	/**
1915	* Sink/Source: WRITE SECTOR
1916	*/
1917	static bool ataR3WriteSectorsSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
1918	{
1919	uint32_t const cbSector = RT_MAX(s->cbSector, 1);
1920	uint64_t iLBA;
1921	uint32_t cSectors;
1922	bool fRedo;
1923	int rc;
1924
1925	cSectors = s->cbElementaryTransfer / cbSector;
1926	Assert(cSectors);
1927	iLBA = s->iCurLBA;
1928	Log(("%s: %d sectors at LBA %d\n", __FUNCTION__, cSectors, iLBA));
1929	rc = ataR3WriteSectors(pDevIns, pCtl, s, pDevR3, iLBA, s->abIOBuffer, cSectors, &fRedo);
1930	if (RT_SUCCESS(rc))
1931	{
1932	ataR3SetSector(s, iLBA + cSectors);
1933	s->iCurLBA = iLBA + cSectors;
1934	if (!s->cbTotalTransfer)
1935	s->iSourceSink = ATAFN_SS_NULL;
1936	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
1937	}
1938	else
1939	{
1940	if (fRedo)
1941	return fRedo;
1942	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
1943	LogRel(("PIIX3 ATA: LUN#%d: disk write error (rc=%Rrc iSector=%#RX64 cSectors=%#RX32)\n",
1944	s->iLUN, rc, iLBA, cSectors));
1945
1946	/*
1947	* Check if we got interrupted. We don't need to set status variables
1948	* because the request was aborted.
1949	*/
1950	if (rc != VERR_INTERRUPTED)
1951	ataR3CmdError(pCtl, s, ID_ERR);
1952	}
1953	return false;
1954	}
1955
1956
1957	static void atapiR3CmdOK(PATACONTROLLER pCtl, PATADEVSTATE s)
1958	{
1959	s->uATARegError = 0;
1960	ataSetStatusValue(pCtl, s, ATA_STAT_READY);
1961	s->uATARegNSector = (s->uATARegNSector & ~7)
1962	\| ((s->uTxDir != PDMMEDIATXDIR_TO_DEVICE) ? ATAPI_INT_REASON_IO : 0)
1963	\| (!s->cbTotalTransfer ? ATAPI_INT_REASON_CD : 0);
1964	Log2(("%s: interrupt reason %#04x\n", __FUNCTION__, s->uATARegNSector));
1965
1966	memset(s->abATAPISense, '\0', sizeof(s->abATAPISense));
1967	s->abATAPISense[0] = 0x70 \| (1 << 7);
1968	s->abATAPISense[7] = 10;
1969	}
1970
1971
1972	static void atapiR3CmdError(PATACONTROLLER pCtl, PATADEVSTATE s, const uint8_t *pabATAPISense, size_t cbATAPISense)
1973	{
1974	Log(("%s: sense=%#x (%s) asc=%#x ascq=%#x (%s)\n", __FUNCTION__, pabATAPISense[2] & 0x0f, SCSISenseText(pabATAPISense[2] & 0x0f),
1975	pabATAPISense[12], pabATAPISense[13], SCSISenseExtText(pabATAPISense[12], pabATAPISense[13])));
1976	s->uATARegError = pabATAPISense[2] << 4;
1977	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| ATA_STAT_ERR);
1978	s->uATARegNSector = (s->uATARegNSector & ~7) \| ATAPI_INT_REASON_IO \| ATAPI_INT_REASON_CD;
1979	Log2(("%s: interrupt reason %#04x\n", __FUNCTION__, s->uATARegNSector));
1980	memset(s->abATAPISense, '\0', sizeof(s->abATAPISense));
1981	memcpy(s->abATAPISense, pabATAPISense, RT_MIN(cbATAPISense, sizeof(s->abATAPISense)));
1982	s->cbTotalTransfer = 0;
1983	s->cbElementaryTransfer = 0;
1984	s->cbAtapiPassthroughTransfer = 0;
1985	s->iIOBufferCur = 0;
1986	s->iIOBufferEnd = 0;
1987	s->uTxDir = PDMMEDIATXDIR_NONE;
1988	s->iBeginTransfer = ATAFN_BT_NULL;
1989	s->iSourceSink = ATAFN_SS_NULL;
1990	}
1991
1992
1993	/** @todo deprecated function - doesn't provide enough info. Replace by direct
1994	* calls to atapiR3CmdError() with full data. */
1995	static void atapiR3CmdErrorSimple(PATACONTROLLER pCtl, PATADEVSTATE s, uint8_t uATAPISenseKey, uint8_t uATAPIASC)
1996	{
1997	uint8_t abATAPISense[ATAPI_SENSE_SIZE];
1998	memset(abATAPISense, '\0', sizeof(abATAPISense));
1999	abATAPISense[0] = 0x70 \| (1 << 7);
2000	abATAPISense[2] = uATAPISenseKey & 0x0f;
2001	abATAPISense[7] = 10;
2002	abATAPISense[12] = uATAPIASC;
2003	atapiR3CmdError(pCtl, s, abATAPISense, sizeof(abATAPISense));
2004	}
2005
2006
2007	/**
2008	* Begin Transfer: ATAPI command
2009	*/
2010	static void atapiR3CmdBT(PATACONTROLLER pCtl, PATADEVSTATE s)
2011	{
2012	s->fATAPITransfer = true;
2013	s->cbElementaryTransfer = s->cbTotalTransfer;
2014	s->cbAtapiPassthroughTransfer = s->cbTotalTransfer;
2015	s->cbPIOTransferLimit = s->uATARegLCyl \| (s->uATARegHCyl << 8);
2016	if (s->uTxDir == PDMMEDIATXDIR_TO_DEVICE)
2017	atapiR3CmdOK(pCtl, s);
2018	}
2019
2020
2021	/**
2022	* Begin Transfer: ATAPI Passthrough command
2023	*/
2024	static void atapiR3PassthroughCmdBT(PATACONTROLLER pCtl, PATADEVSTATE s)
2025	{
2026	atapiR3CmdBT(pCtl, s);
2027	}
2028
2029
2030	/**
2031	* Sink/Source: READ
2032	*/
2033	static bool atapiR3ReadSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2034	{
2035	int rc;
2036	uint64_t cbBlockRegion = 0;
2037	VDREGIONDATAFORM enmDataForm;
2038
2039	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
2040	uint32_t const iATAPILBA = s->iCurLBA;
2041	uint32_t const cbTransfer = RT_MIN(s->cbTotalTransfer, RT_MIN(s->cbIOBuffer, ATA_MAX_IO_BUFFER_SIZE));
2042	uint32_t const cbATAPISector = s->cbATAPISector;
2043	uint32_t const cSectors = cbTransfer / cbATAPISector;
2044	Assert(cSectors * cbATAPISector <= cbTransfer);
2045	Log(("%s: %d sectors at LBA %d\n", __FUNCTION__, cSectors, iATAPILBA));
2046	AssertLogRelReturn(cSectors * cbATAPISector <= sizeof(s->abIOBuffer), false);
2047
2048	ataR3LockLeave(pDevIns, pCtl);
2049
2050	rc = pDevR3->pDrvMedia->pfnQueryRegionPropertiesForLba(pDevR3->pDrvMedia, iATAPILBA, NULL, NULL,
2051	&cbBlockRegion, &enmDataForm);
2052	if (RT_SUCCESS(rc))
2053	{
2054	STAM_PROFILE_ADV_START(&s->StatReads, r);
2055	s->Led.Asserted.s.fReading = s->Led.Actual.s.fReading = 1;
2056
2057	/* If the region block size and requested sector matches we can just pass the request through. */
2058	if (cbBlockRegion == cbATAPISector)
2059	rc = pDevR3->pDrvMedia->pfnRead(pDevR3->pDrvMedia, (uint64_t)iATAPILBA * cbATAPISector,
2060	s->abIOBuffer, cbATAPISector * cSectors);
2061	else
2062	{
2063	uint32_t const iEndSector = iATAPILBA + cSectors;
2064	ASSERT_GUEST(iEndSector >= iATAPILBA);
2065	if (cbBlockRegion == 2048 && cbATAPISector == 2352)
2066	{
2067	/* Generate the sync bytes. */
2068	uint8_t *pbBuf = s->abIOBuffer;
2069
2070	for (uint32_t i = iATAPILBA; i < iEndSector; i++)
2071	{
2072	/* Sync bytes, see 4.2.3.8 CD Main Channel Block Formats */
2073	*pbBuf++ = 0x00;
2074	memset(pbBuf, 0xff, 10);
2075	pbBuf += 10;
2076	*pbBuf++ = 0x00;
2077	/* MSF */
2078	scsiLBA2MSF(pbBuf, i);
2079	pbBuf += 3;
2080	pbBuf++ = 0x01; / mode 1 data */
2081	/* data */
2082	rc = pDevR3->pDrvMedia->pfnRead(pDevR3->pDrvMedia, (uint64_t)i * 2048, pbBuf, 2048);
2083	if (RT_FAILURE(rc))
2084	break;
2085	pbBuf += 2048;
2086	/**
2087	* @todo maybe compute ECC and parity, layout is:
2088	* 2072 4 EDC
2089	* 2076 172 P parity symbols
2090	* 2248 104 Q parity symbols
2091	*/
2092	memset(pbBuf, 0, 280);
2093	pbBuf += 280;
2094	}
2095	}
2096	else if (cbBlockRegion == 2352 && cbATAPISector == 2048)
2097	{
2098	/* Read only the user data portion. */
2099	uint8_t *pbBuf = s->abIOBuffer;
2100
2101	for (uint32_t i = iATAPILBA; i < iEndSector; i++)
2102	{
2103	uint8_t abTmp[2352];
2104	uint8_t cbSkip;
2105
2106	rc = pDevR3->pDrvMedia->pfnRead(pDevR3->pDrvMedia, (uint64_t)i * 2352, &abTmp[0], 2352);
2107	if (RT_FAILURE(rc))
2108	break;
2109
2110	/* Mode 2 has an additional subheader before user data; we need to
2111	* skip 16 bytes for Mode 1 (sync + header) and 20 bytes for Mode 2 +
2112	* (sync + header + subheader).
2113	*/
2114	switch (enmDataForm) {
2115	case VDREGIONDATAFORM_MODE2_2352:
2116	case VDREGIONDATAFORM_XA_2352:
2117	cbSkip = 24;
2118	break;
2119	case VDREGIONDATAFORM_MODE1_2352:
2120	cbSkip = 16;
2121	break;
2122	default:
2123	AssertMsgFailed(("Unexpected region form (%#u), using default skip value\n", enmDataForm));
2124	cbSkip = 16;
2125	}
2126	memcpy(pbBuf, &abTmp[cbSkip], 2048);
2127	pbBuf += 2048;
2128	}
2129	}
2130	else
2131	ASSERT_GUEST_MSG_FAILED(("Unsupported: cbBlockRegion=%u cbATAPISector=%u\n", cbBlockRegion, cbATAPISector));
2132	}
2133	s->Led.Actual.s.fReading = 0;
2134	STAM_PROFILE_ADV_STOP(&s->StatReads, r);
2135	}
2136
2137	ataR3LockEnter(pDevIns, pCtl);
2138
2139	if (RT_SUCCESS(rc))
2140	{
2141	STAM_REL_COUNTER_ADD(&s->StatBytesRead, cbATAPISector * cSectors);
2142
2143	/* The initial buffer end value has been set up based on the total
2144	* transfer size. But the I/O buffer size limits what can actually be
2145	* done in one transfer, so set the actual value of the buffer end. */
2146	s->cbElementaryTransfer = cbTransfer;
2147	if (cbTransfer >= s->cbTotalTransfer)
2148	s->iSourceSink = ATAFN_SS_NULL;
2149	atapiR3CmdOK(pCtl, s);
2150	s->iCurLBA = iATAPILBA + cSectors;
2151	}
2152	else
2153	{
2154	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
2155	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM read error, %d sectors at LBA %d\n", s->iLUN, cSectors, iATAPILBA));
2156
2157	/*
2158	* Check if we got interrupted. We don't need to set status variables
2159	* because the request was aborted.
2160	*/
2161	if (rc != VERR_INTERRUPTED)
2162	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_MEDIUM_ERROR, SCSI_ASC_READ_ERROR);
2163	}
2164	return false;
2165	}
2166
2167	/**
2168	* Sets the given media track type.
2169	*/
2170	static uint32_t ataR3MediumTypeSet(PATADEVSTATE s, uint32_t MediaTrackType)
2171	{
2172	return ASMAtomicXchgU32(&s->MediaTrackType, MediaTrackType);
2173	}
2174
2175
2176	/**
2177	* Sink/Source: Passthrough
2178	*/
2179	static bool atapiR3PassthroughSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2180	{
2181	int rc = VINF_SUCCESS;
2182	uint8_t abATAPISense[ATAPI_SENSE_SIZE];
2183	uint32_t cbTransfer;
2184	PSTAMPROFILEADV pProf = NULL;
2185
2186	cbTransfer = RT_MIN(s->cbAtapiPassthroughTransfer, RT_MIN(s->cbIOBuffer, ATA_MAX_IO_BUFFER_SIZE));
2187
2188	if (s->uTxDir == PDMMEDIATXDIR_TO_DEVICE)
2189	Log3(("ATAPI PT data write (%d): %.*Rhxs\n", cbTransfer, cbTransfer, s->abIOBuffer));
2190
2191	/* Simple heuristics: if there is at least one sector of data
2192	* to transfer, it's worth updating the LEDs. */
2193	if (cbTransfer >= 2048)
2194	{
2195	if (s->uTxDir != PDMMEDIATXDIR_TO_DEVICE)
2196	{
2197	s->Led.Asserted.s.fReading = s->Led.Actual.s.fReading = 1;
2198	pProf = &s->StatReads;
2199	}
2200	else
2201	{
2202	s->Led.Asserted.s.fWriting = s->Led.Actual.s.fWriting = 1;
2203	pProf = &s->StatWrites;
2204	}
2205	}
2206
2207	ataR3LockLeave(pDevIns, pCtl);
2208
2209	# if defined(LOG_ENABLED)
2210	char szBuf[1024];
2211
2212	memset(szBuf, 0, sizeof(szBuf));
2213
2214	switch (s->abATAPICmd[0])
2215	{
2216	case SCSI_MODE_SELECT_10:
2217	{
2218	size_t cbBlkDescLength = scsiBE2H_U16(&s->abIOBuffer[6]);
2219
2220	SCSILogModePage(szBuf, sizeof(szBuf) - 1,
2221	s->abIOBuffer + 8 + cbBlkDescLength,
2222	cbTransfer - 8 - cbBlkDescLength);
2223	break;
2224	}
2225	case SCSI_SEND_CUE_SHEET:
2226	{
2227	SCSILogCueSheet(szBuf, sizeof(szBuf) - 1,
2228	s->abIOBuffer, cbTransfer);
2229	break;
2230	}
2231	default:
2232	break;
2233	}
2234
2235	Log2(("%s\n", szBuf));
2236	# endif
2237
2238	if (pProf) { STAM_PROFILE_ADV_START(pProf, b); }
2239
2240	Assert(s->cbATAPISector);
2241	const uint32_t cbATAPISector = RT_MAX(s->cbATAPISector, 1); /* paranoia */
2242	const uint32_t cbIOBuffer = RT_MIN(s->cbIOBuffer, ATA_MAX_IO_BUFFER_SIZE); /* ditto */
2243
2244	if ( cbTransfer > SCSI_MAX_BUFFER_SIZE
2245	\|\| s->cbElementaryTransfer > cbIOBuffer)
2246	{
2247	/* Linux accepts commands with up to 100KB of data, but expects
2248	* us to handle commands with up to 128KB of data. The usual
2249	* imbalance of powers. */
2250	uint8_t abATAPICmd[ATAPI_PACKET_SIZE];
2251	uint32_t iATAPILBA, cSectors, cReqSectors, cbCurrTX;
2252	uint8_t *pbBuf = s->abIOBuffer;
2253	uint32_t cSectorsMax; /*< Maximum amount of sectors to read without exceeding the I/O buffer. /
2254
2255	cSectorsMax = cbTransfer / cbATAPISector;
2256	AssertStmt(cSectorsMax * s->cbATAPISector <= cbIOBuffer, cSectorsMax = cbIOBuffer / cbATAPISector);
2257
2258	switch (s->abATAPICmd[0])
2259	{
2260	case SCSI_READ_10:
2261	case SCSI_WRITE_10:
2262	case SCSI_WRITE_AND_VERIFY_10:
2263	iATAPILBA = scsiBE2H_U32(s->abATAPICmd + 2);
2264	cSectors = scsiBE2H_U16(s->abATAPICmd + 7);
2265	break;
2266	case SCSI_READ_12:
2267	case SCSI_WRITE_12:
2268	iATAPILBA = scsiBE2H_U32(s->abATAPICmd + 2);
2269	cSectors = scsiBE2H_U32(s->abATAPICmd + 6);
2270	break;
2271	case SCSI_READ_CD:
2272	iATAPILBA = scsiBE2H_U32(s->abATAPICmd + 2);
2273	cSectors = scsiBE2H_U24(s->abATAPICmd + 6);
2274	break;
2275	case SCSI_READ_CD_MSF:
2276	iATAPILBA = scsiMSF2LBA(s->abATAPICmd + 3);
2277	cSectors = scsiMSF2LBA(s->abATAPICmd + 6) - iATAPILBA;
2278	break;
2279	default:
2280	AssertMsgFailed(("Don't know how to split command %#04x\n", s->abATAPICmd[0]));
2281	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
2282	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM passthrough split error\n", s->iLUN));
2283	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE);
2284	ataR3LockEnter(pDevIns, pCtl);
2285	return false;
2286	}
2287	cSectorsMax = RT_MIN(cSectorsMax, cSectors);
2288	memcpy(abATAPICmd, s->abATAPICmd, ATAPI_PACKET_SIZE);
2289	cReqSectors = 0;
2290	for (uint32_t i = cSectorsMax; i > 0; i -= cReqSectors)
2291	{
2292	if (i * cbATAPISector > SCSI_MAX_BUFFER_SIZE)
2293	cReqSectors = SCSI_MAX_BUFFER_SIZE / cbATAPISector;
2294	else
2295	cReqSectors = i;
2296	cbCurrTX = cbATAPISector * cReqSectors;
2297	switch (s->abATAPICmd[0])
2298	{
2299	case SCSI_READ_10:
2300	case SCSI_WRITE_10:
2301	case SCSI_WRITE_AND_VERIFY_10:
2302	scsiH2BE_U32(abATAPICmd + 2, iATAPILBA);
2303	scsiH2BE_U16(abATAPICmd + 7, cReqSectors);
2304	break;
2305	case SCSI_READ_12:
2306	case SCSI_WRITE_12:
2307	scsiH2BE_U32(abATAPICmd + 2, iATAPILBA);
2308	scsiH2BE_U32(abATAPICmd + 6, cReqSectors);
2309	break;
2310	case SCSI_READ_CD:
2311	scsiH2BE_U32(abATAPICmd + 2, iATAPILBA);
2312	scsiH2BE_U24(abATAPICmd + 6, cReqSectors);
2313	break;
2314	case SCSI_READ_CD_MSF:
2315	scsiLBA2MSF(abATAPICmd + 3, iATAPILBA);
2316	scsiLBA2MSF(abATAPICmd + 6, iATAPILBA + cReqSectors);
2317	break;
2318	}
2319	AssertLogRelReturn((uintptr_t)(pbBuf - &s->abIOBuffer[0]) + cbCurrTX <= sizeof(s->abIOBuffer), false);
2320	rc = pDevR3->pDrvMedia->pfnSendCmd(pDevR3->pDrvMedia, abATAPICmd, ATAPI_PACKET_SIZE, (PDMMEDIATXDIR)s->uTxDir,
2321	pbBuf, &cbCurrTX, abATAPISense, sizeof(abATAPISense), 30000 /*< @todo timeout /);
2322	if (rc != VINF_SUCCESS)
2323	break;
2324	iATAPILBA += cReqSectors;
2325	pbBuf += cbATAPISector * cReqSectors;
2326	}
2327
2328	if (RT_SUCCESS(rc))
2329	{
2330	/* Adjust ATAPI command for the next call. */
2331	switch (s->abATAPICmd[0])
2332	{
2333	case SCSI_READ_10:
2334	case SCSI_WRITE_10:
2335	case SCSI_WRITE_AND_VERIFY_10:
2336	scsiH2BE_U32(s->abATAPICmd + 2, iATAPILBA);
2337	scsiH2BE_U16(s->abATAPICmd + 7, cSectors - cSectorsMax);
2338	break;
2339	case SCSI_READ_12:
2340	case SCSI_WRITE_12:
2341	scsiH2BE_U32(s->abATAPICmd + 2, iATAPILBA);
2342	scsiH2BE_U32(s->abATAPICmd + 6, cSectors - cSectorsMax);
2343	break;
2344	case SCSI_READ_CD:
2345	scsiH2BE_U32(s->abATAPICmd + 2, iATAPILBA);
2346	scsiH2BE_U24(s->abATAPICmd + 6, cSectors - cSectorsMax);
2347	break;
2348	case SCSI_READ_CD_MSF:
2349	scsiLBA2MSF(s->abATAPICmd + 3, iATAPILBA);
2350	scsiLBA2MSF(s->abATAPICmd + 6, iATAPILBA + cSectors - cSectorsMax);
2351	break;
2352	default:
2353	AssertMsgFailed(("Don't know how to split command %#04x\n", s->abATAPICmd[0]));
2354	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
2355	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM passthrough split error\n", s->iLUN));
2356	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE);
2357	return false;
2358	}
2359	}
2360	}
2361	else
2362	{
2363	AssertLogRelReturn(cbTransfer <= sizeof(s->abIOBuffer), false);
2364	rc = pDevR3->pDrvMedia->pfnSendCmd(pDevR3->pDrvMedia, s->abATAPICmd, ATAPI_PACKET_SIZE, (PDMMEDIATXDIR)s->uTxDir,
2365	s->abIOBuffer, &cbTransfer, abATAPISense, sizeof(abATAPISense), 30000 /*< @todo timeout /);
2366	}
2367	if (pProf) { STAM_PROFILE_ADV_STOP(pProf, b); }
2368
2369	ataR3LockEnter(pDevIns, pCtl);
2370
2371	/* Update the LEDs and the read/write statistics. */
2372	if (cbTransfer >= 2048)
2373	{
2374	if (s->uTxDir != PDMMEDIATXDIR_TO_DEVICE)
2375	{
2376	s->Led.Actual.s.fReading = 0;
2377	STAM_REL_COUNTER_ADD(&s->StatBytesRead, cbTransfer);
2378	}
2379	else
2380	{
2381	s->Led.Actual.s.fWriting = 0;
2382	STAM_REL_COUNTER_ADD(&s->StatBytesWritten, cbTransfer);
2383	}
2384	}
2385
2386	if (RT_SUCCESS(rc))
2387	{
2388	/* Do post processing for certain commands. */
2389	switch (s->abATAPICmd[0])
2390	{
2391	case SCSI_SEND_CUE_SHEET:
2392	case SCSI_READ_TOC_PMA_ATIP:
2393	{
2394	if (!pDevR3->pTrackList)
2395	rc = ATAPIPassthroughTrackListCreateEmpty(&pDevR3->pTrackList);
2396
2397	if (RT_SUCCESS(rc))
2398	rc = ATAPIPassthroughTrackListUpdate(pDevR3->pTrackList, s->abATAPICmd, s->abIOBuffer, sizeof(s->abIOBuffer));
2399
2400	if ( RT_FAILURE(rc)
2401	&& s->cErrors++ < MAX_LOG_REL_ERRORS)
2402	LogRel(("ATA: Error (%Rrc) while updating the tracklist during %s, burning the disc might fail\n",
2403	rc, s->abATAPICmd[0] == SCSI_SEND_CUE_SHEET ? "SEND CUE SHEET" : "READ TOC/PMA/ATIP"));
2404	break;
2405	}
2406	case SCSI_SYNCHRONIZE_CACHE:
2407	{
2408	if (pDevR3->pTrackList)
2409	ATAPIPassthroughTrackListClear(pDevR3->pTrackList);
2410	break;
2411	}
2412	}
2413
2414	if (s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE)
2415	{
2416	/*
2417	* Reply with the same amount of data as the real drive
2418	* but only if the command wasn't split.
2419	*/
2420	if (s->cbAtapiPassthroughTransfer < cbIOBuffer)
2421	s->cbTotalTransfer = cbTransfer;
2422
2423	if ( s->abATAPICmd[0] == SCSI_INQUIRY
2424	&& s->fOverwriteInquiry)
2425	{
2426	/* Make sure that the real drive cannot be identified.
2427	* Motivation: changing the VM configuration should be as
2428	* invisible as possible to the guest. */
2429	Log3(("ATAPI PT inquiry data before (%d): %.*Rhxs\n", cbTransfer, cbTransfer, s->abIOBuffer));
2430	scsiPadStr(&s->abIOBuffer[8], "VBOX", 8);
2431	scsiPadStr(&s->abIOBuffer[16], "CD-ROM", 16);
2432	scsiPadStr(&s->abIOBuffer[32], "1.0", 4);
2433	}
2434
2435	if (cbTransfer)
2436	Log3(("ATAPI PT data read (%d):\n%.*Rhxd\n", cbTransfer, cbTransfer, s->abIOBuffer));
2437	}
2438
2439	/* The initial buffer end value has been set up based on the total
2440	* transfer size. But the I/O buffer size limits what can actually be
2441	* done in one transfer, so set the actual value of the buffer end. */
2442	Assert(cbTransfer <= s->cbAtapiPassthroughTransfer);
2443	s->cbElementaryTransfer = cbTransfer;
2444	s->cbAtapiPassthroughTransfer -= cbTransfer;
2445	if (!s->cbAtapiPassthroughTransfer)
2446	{
2447	s->iSourceSink = ATAFN_SS_NULL;
2448	atapiR3CmdOK(pCtl, s);
2449	}
2450	}
2451	else
2452	{
2453	if (s->cErrors < MAX_LOG_REL_ERRORS)
2454	{
2455	uint8_t u8Cmd = s->abATAPICmd[0];
2456	do
2457	{
2458	/* don't log superfluous errors */
2459	if ( rc == VERR_DEV_IO_ERROR
2460	&& ( u8Cmd == SCSI_TEST_UNIT_READY
2461	\|\| u8Cmd == SCSI_READ_CAPACITY
2462	\|\| u8Cmd == SCSI_READ_DVD_STRUCTURE
2463	\|\| u8Cmd == SCSI_READ_TOC_PMA_ATIP))
2464	break;
2465	s->cErrors++;
2466	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM passthrough cmd=%#04x sense=%d ASC=%#02x ASCQ=%#02x %Rrc\n",
2467	s->iLUN, u8Cmd, abATAPISense[2] & 0x0f, abATAPISense[12], abATAPISense[13], rc));
2468	} while (0);
2469	}
2470	atapiR3CmdError(pCtl, s, abATAPISense, sizeof(abATAPISense));
2471	}
2472	return false;
2473	}
2474
2475
2476	/**
2477	* Begin Transfer: Read DVD structures
2478	*/
2479	static bool atapiR3ReadDVDStructureSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2480	{
2481	uint8_t *buf = s->abIOBuffer;
2482	int media = s->abATAPICmd[1];
2483	int format = s->abATAPICmd[7];
2484	RT_NOREF(pDevIns, pDevR3);
2485
2486	AssertCompile(sizeof(s->abIOBuffer) > UINT16_MAX /* want a RT_MIN() below, but clang takes offence at always false stuff */);
2487	uint16_t max_len = scsiBE2H_U16(&s->abATAPICmd[8]);
2488	memset(buf, 0, max_len);
2489
2490	switch (format) {
2491	case 0x00:
2492	case 0x01:
2493	case 0x02:
2494	case 0x03:
2495	case 0x04:
2496	case 0x05:
2497	case 0x06:
2498	case 0x07:
2499	case 0x08:
2500	case 0x09:
2501	case 0x0a:
2502	case 0x0b:
2503	case 0x0c:
2504	case 0x0d:
2505	case 0x0e:
2506	case 0x0f:
2507	case 0x10:
2508	case 0x11:
2509	case 0x30:
2510	case 0x31:
2511	case 0xff:
2512	if (media == 0)
2513	{
2514	int uASC = SCSI_ASC_NONE;
2515
2516	switch (format)
2517	{
2518	case 0x0: /* Physical format information */
2519	{
2520	int layer = s->abATAPICmd[6];
2521	uint64_t total_sectors;
2522
2523	if (layer != 0)
2524	{
2525	uASC = -SCSI_ASC_INV_FIELD_IN_CMD_PACKET;
2526	break;
2527	}
2528
2529	total_sectors = s->cTotalSectors;
2530	total_sectors >>= 2;
2531	if (total_sectors == 0)
2532	{
2533	uASC = -SCSI_ASC_MEDIUM_NOT_PRESENT;
2534	break;
2535	}
2536
2537	buf[4] = 1; /* DVD-ROM, part version 1 */
2538	buf[5] = 0xf; /* 120mm disc, minimum rate unspecified */
2539	buf[6] = 1; /* one layer, read-only (per MMC-2 spec) */
2540	buf[7] = 0; /* default densities */
2541
2542	/* FIXME: 0x30000 per spec? */
2543	scsiH2BE_U32(buf + 8, 0); /* start sector */
2544	scsiH2BE_U32(buf + 12, total_sectors - 1); /* end sector */
2545	scsiH2BE_U32(buf + 16, total_sectors - 1); /* l0 end sector */
2546
2547	/* Size of buffer, not including 2 byte size field */
2548	scsiH2BE_U32(&buf[0], 2048 + 2);
2549
2550	/* 2k data + 4 byte header */
2551	uASC = (2048 + 4);
2552	break;
2553	}
2554	case 0x01: /* DVD copyright information */
2555	buf[4] = 0; /* no copyright data */
2556	buf[5] = 0; /* no region restrictions */
2557
2558	/* Size of buffer, not including 2 byte size field */
2559	scsiH2BE_U16(buf, 4 + 2);
2560
2561	/* 4 byte header + 4 byte data */
2562	uASC = (4 + 4);
2563	break;
2564
2565	case 0x03: /* BCA information - invalid field for no BCA info */
2566	uASC = -SCSI_ASC_INV_FIELD_IN_CMD_PACKET;
2567	break;
2568
2569	case 0x04: /* DVD disc manufacturing information */
2570	/* Size of buffer, not including 2 byte size field */
2571	scsiH2BE_U16(buf, 2048 + 2);
2572
2573	/* 2k data + 4 byte header */
2574	uASC = (2048 + 4);
2575	break;
2576	case 0xff:
2577	/*
2578	* This lists all the command capabilities above. Add new ones
2579	* in order and update the length and buffer return values.
2580	*/
2581
2582	buf[4] = 0x00; /* Physical format */
2583	buf[5] = 0x40; /* Not writable, is readable */
2584	scsiH2BE_U16((buf + 6), 2048 + 4);
2585
2586	buf[8] = 0x01; /* Copyright info */
2587	buf[9] = 0x40; /* Not writable, is readable */
2588	scsiH2BE_U16((buf + 10), 4 + 4);
2589
2590	buf[12] = 0x03; /* BCA info */
2591	buf[13] = 0x40; /* Not writable, is readable */
2592	scsiH2BE_U16((buf + 14), 188 + 4);
2593
2594	buf[16] = 0x04; /* Manufacturing info */
2595	buf[17] = 0x40; /* Not writable, is readable */
2596	scsiH2BE_U16((buf + 18), 2048 + 4);
2597
2598	/* Size of buffer, not including 2 byte size field */
2599	scsiH2BE_U16(buf, 16 + 2);
2600
2601	/* data written + 4 byte header */
2602	uASC = (16 + 4);
2603	break;
2604	default: /** @todo formats beyond DVD-ROM requires */
2605	uASC = -SCSI_ASC_INV_FIELD_IN_CMD_PACKET;
2606	}
2607
2608	if (uASC < 0)
2609	{
2610	s->iSourceSink = ATAFN_SS_NULL;
2611	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, -uASC);
2612	return false;
2613	}
2614	break;
2615	}
2616	/** @todo BD support, fall through for now */
2617	RT_FALL_THRU();
2618
2619	/* Generic disk structures */
2620	case 0x80: /** @todo AACS volume identifier */
2621	case 0x81: /** @todo AACS media serial number */
2622	case 0x82: /** @todo AACS media identifier */
2623	case 0x83: /** @todo AACS media key block */
2624	case 0x90: /** @todo List of recognized format layers */
2625	case 0xc0: /** @todo Write protection status */
2626	default:
2627	s->iSourceSink = ATAFN_SS_NULL;
2628	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
2629	return false;
2630	}
2631
2632	s->iSourceSink = ATAFN_SS_NULL;
2633	atapiR3CmdOK(pCtl, s);
2634	return false;
2635	}
2636
2637
2638	static bool atapiR3ReadSectors(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s,
2639	uint32_t iATAPILBA, uint32_t cSectors, uint32_t cbSector)
2640	{
2641	Assert(cSectors > 0);
2642	s->iCurLBA = iATAPILBA;
2643	s->cbATAPISector = cbSector;
2644	ataR3StartTransfer(pDevIns, pCtl, s, cSectors * cbSector,
2645	PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ, true);
2646	return false;
2647	}
2648
2649
2650	/**
2651	* Sink/Source: ATAPI READ CAPACITY
2652	*/
2653	static bool atapiR3ReadCapacitySS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2654	{
2655	uint8_t *pbBuf = s->abIOBuffer;
2656	RT_NOREF(pDevIns, pDevR3);
2657
2658	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
2659	Assert(s->cbElementaryTransfer <= 8);
2660	scsiH2BE_U32(pbBuf, s->cTotalSectors - 1);
2661	scsiH2BE_U32(pbBuf + 4, 2048);
2662	s->iSourceSink = ATAFN_SS_NULL;
2663	atapiR3CmdOK(pCtl, s);
2664	return false;
2665	}
2666
2667
2668	/**
2669	* Sink/Source: ATAPI READ DISCK INFORMATION
2670	*/
2671	static bool atapiR3ReadDiscInformationSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2672	{
2673	uint8_t *pbBuf = s->abIOBuffer;
2674	RT_NOREF(pDevIns, pDevR3);
2675
2676	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
2677	Assert(s->cbElementaryTransfer <= 34);
2678	memset(pbBuf, '\0', 34);
2679	scsiH2BE_U16(pbBuf, 32);
2680	pbBuf[2] = (0 << 4) \| (3 << 2) \| (2 << 0); /* not erasable, complete session, complete disc */
2681	pbBuf[3] = 1; /* number of first track */
2682	pbBuf[4] = 1; /* number of sessions (LSB) */
2683	pbBuf[5] = 1; /* first track number in last session (LSB) */
2684	pbBuf[6] = (uint8_t)pDevR3->pDrvMedia->pfnGetRegionCount(pDevR3->pDrvMedia); /* last track number in last session (LSB) */
2685	pbBuf[7] = (0 << 7) \| (0 << 6) \| (1 << 5) \| (0 << 2) \| (0 << 0); /* disc id not valid, disc bar code not valid, unrestricted use, not dirty, not RW medium */
2686	pbBuf[8] = 0; /* disc type = CD-ROM */
2687	pbBuf[9] = 0; /* number of sessions (MSB) */
2688	pbBuf[10] = 0; /* number of sessions (MSB) */
2689	pbBuf[11] = 0; /* number of sessions (MSB) */
2690	scsiH2BE_U32(pbBuf + 16, 0xffffffff); /* last session lead-in start time is not available */
2691	scsiH2BE_U32(pbBuf + 20, 0xffffffff); /* last possible start time for lead-out is not available */
2692	s->iSourceSink = ATAFN_SS_NULL;
2693	atapiR3CmdOK(pCtl, s);
2694	return false;
2695	}
2696
2697
2698	/**
2699	* Sink/Source: ATAPI READ TRACK INFORMATION
2700	*/
2701	static bool atapiR3ReadTrackInformationSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2702	{
2703	uint8_t *pbBuf = s->abIOBuffer;
2704	uint32_t u32LogAddr = scsiBE2H_U32(&s->abATAPICmd[2]);
2705	uint8_t u8LogAddrType = s->abATAPICmd[1] & 0x03;
2706	RT_NOREF(pDevIns);
2707
2708	int rc;
2709	uint64_t u64LbaStart = 0;
2710	uint32_t uRegion = 0;
2711	uint64_t cBlocks = 0;
2712	uint64_t cbBlock = 0;
2713	uint8_t u8DataMode = 0xf; /* Unknown data mode. */
2714	uint8_t u8TrackMode = 0;
2715	VDREGIONDATAFORM enmDataForm = VDREGIONDATAFORM_INVALID;
2716
2717	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
2718	Assert(s->cbElementaryTransfer <= 36);
2719
2720	switch (u8LogAddrType)
2721	{
2722	case 0x00:
2723	rc = pDevR3->pDrvMedia->pfnQueryRegionPropertiesForLba(pDevR3->pDrvMedia, u32LogAddr, &uRegion,
2724	NULL, NULL, NULL);
2725	if (RT_SUCCESS(rc))
2726	rc = pDevR3->pDrvMedia->pfnQueryRegionProperties(pDevR3->pDrvMedia, uRegion, &u64LbaStart,
2727	&cBlocks, &cbBlock, &enmDataForm);
2728	break;
2729	case 0x01:
2730	{
2731	if (u32LogAddr >= 1)
2732	{
2733	uRegion = u32LogAddr - 1;
2734	rc = pDevR3->pDrvMedia->pfnQueryRegionProperties(pDevR3->pDrvMedia, uRegion, &u64LbaStart,
2735	&cBlocks, &cbBlock, &enmDataForm);
2736	}
2737	else
2738	rc = VERR_NOT_FOUND; /** @todo Return lead-in information. */
2739	break;
2740	}
2741	case 0x02:
2742	default:
2743	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
2744	return false;
2745	}
2746
2747	if (RT_FAILURE(rc))
2748	{
2749	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
2750	return false;
2751	}
2752
2753	switch (enmDataForm)
2754	{
2755	case VDREGIONDATAFORM_MODE1_2048:
2756	case VDREGIONDATAFORM_MODE1_2352:
2757	case VDREGIONDATAFORM_MODE1_0:
2758	u8DataMode = 1;
2759	break;
2760	case VDREGIONDATAFORM_XA_2336:
2761	case VDREGIONDATAFORM_XA_2352:
2762	case VDREGIONDATAFORM_XA_0:
2763	case VDREGIONDATAFORM_MODE2_2336:
2764	case VDREGIONDATAFORM_MODE2_2352:
2765	case VDREGIONDATAFORM_MODE2_0:
2766	u8DataMode = 2;
2767	break;
2768	default:
2769	u8DataMode = 0xf;
2770	}
2771
2772	if (enmDataForm == VDREGIONDATAFORM_CDDA)
2773	u8TrackMode = 0x0;
2774	else
2775	u8TrackMode = 0x4;
2776
2777	memset(pbBuf, '\0', 36);
2778	scsiH2BE_U16(pbBuf, 34);
2779	pbBuf[2] = uRegion + 1; /* track number (LSB) */
2780	pbBuf[3] = 1; /* session number (LSB) */
2781	pbBuf[5] = (0 << 5) \| (0 << 4) \| u8TrackMode; /* not damaged, primary copy, data track */
2782	pbBuf[6] = (0 << 7) \| (0 << 6) \| (0 << 5) \| (0 << 6) \| u8DataMode; /* not reserved track, not blank, not packet writing, not fixed packet */
2783	pbBuf[7] = (0 << 1) \| (0 << 0); /* last recorded address not valid, next recordable address not valid */
2784	scsiH2BE_U32(pbBuf + 8, (uint32_t)u64LbaStart); /* track start address is 0 */
2785	scsiH2BE_U32(pbBuf + 24, (uint32_t)cBlocks); /* track size */
2786	pbBuf[32] = 0; /* track number (MSB) */
2787	pbBuf[33] = 0; /* session number (MSB) */
2788	s->iSourceSink = ATAFN_SS_NULL;
2789	atapiR3CmdOK(pCtl, s);
2790	return false;
2791	}
2792
2793	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureListProfiles(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2794	{
2795	RT_NOREF(s);
2796	if (cbBuf < 3*4)
2797	return 0;
2798
2799	scsiH2BE_U16(pbBuf, 0x0); /* feature 0: list of profiles supported */
2800	pbBuf[2] = (0 << 2) \| (1 << 1) \| (1 << 0); /* version 0, persistent, current */
2801	pbBuf[3] = 8; /* additional bytes for profiles */
2802	/* The MMC-3 spec says that DVD-ROM read capability should be reported
2803	* before CD-ROM read capability. */
2804	scsiH2BE_U16(pbBuf + 4, 0x10); /* profile: read-only DVD */
2805	pbBuf[6] = (0 << 0); /* NOT current profile */
2806	scsiH2BE_U16(pbBuf + 8, 0x08); /* profile: read only CD */
2807	pbBuf[10] = (1 << 0); /* current profile */
2808
2809	return 34; / Header + 2 profiles entries */
2810	}
2811
2812	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureCore(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2813	{
2814	RT_NOREF(s);
2815	if (cbBuf < 12)
2816	return 0;
2817
2818	scsiH2BE_U16(pbBuf, 0x1); /* feature 0001h: Core Feature */
2819	pbBuf[2] = (0x2 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2820	pbBuf[3] = 8; /* Additional length */
2821	scsiH2BE_U16(pbBuf + 4, 0x00000002); /* Physical interface ATAPI. */
2822	pbBuf[8] = RT_BIT(0); /* DBE */
2823	/* Rest is reserved. */
2824
2825	return 12;
2826	}
2827
2828	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureMorphing(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2829	{
2830	RT_NOREF(s);
2831	if (cbBuf < 8)
2832	return 0;
2833
2834	scsiH2BE_U16(pbBuf, 0x2); /* feature 0002h: Morphing Feature */
2835	pbBuf[2] = (0x1 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2836	pbBuf[3] = 4; /* Additional length */
2837	pbBuf[4] = RT_BIT(1) \| 0x0; /* OCEvent \| !ASYNC */
2838	/* Rest is reserved. */
2839
2840	return 8;
2841	}
2842
2843	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureRemovableMedium(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2844	{
2845	RT_NOREF(s);
2846	if (cbBuf < 8)
2847	return 0;
2848
2849	scsiH2BE_U16(pbBuf, 0x3); /* feature 0003h: Removable Medium Feature */
2850	pbBuf[2] = (0x2 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2851	pbBuf[3] = 4; /* Additional length */
2852	/* Tray type loading \| Load \| Eject \| !Pvnt Jmpr \| !DBML \| Lock */
2853	pbBuf[4] = (0x2 << 5) \| RT_BIT(4) \| RT_BIT(3) \| (0x0 << 2) \| (0x0 << 1) \| RT_BIT(0);
2854	/* Rest is reserved. */
2855
2856	return 8;
2857	}
2858
2859	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureRandomReadable (PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2860	{
2861	RT_NOREF(s);
2862	if (cbBuf < 12)
2863	return 0;
2864
2865	scsiH2BE_U16(pbBuf, 0x10); /* feature 0010h: Random Readable Feature */
2866	pbBuf[2] = (0x0 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2867	pbBuf[3] = 8; /* Additional length */
2868	scsiH2BE_U32(pbBuf + 4, 2048); /* Logical block size. */
2869	scsiH2BE_U16(pbBuf + 8, 0x10); /* Blocking (0x10 for DVD, CD is not defined). */
2870	pbBuf[10] = 0; /* PP not present */
2871	/* Rest is reserved. */
2872
2873	return 12;
2874	}
2875
2876	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureCDRead(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2877	{
2878	RT_NOREF(s);
2879	if (cbBuf < 8)
2880	return 0;
2881
2882	scsiH2BE_U16(pbBuf, 0x1e); /* feature 001Eh: CD Read Feature */
2883	pbBuf[2] = (0x2 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2884	pbBuf[3] = 0; /* Additional length */
2885	pbBuf[4] = (0x0 << 7) \| (0x0 << 1) \| 0x0; /* !DAP \| !C2-Flags \| !CD-Text. */
2886	/* Rest is reserved. */
2887
2888	return 8;
2889	}
2890
2891	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeaturePowerManagement(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2892	{
2893	RT_NOREF(s);
2894	if (cbBuf < 4)
2895	return 0;
2896
2897	scsiH2BE_U16(pbBuf, 0x100); /* feature 0100h: Power Management Feature */
2898	pbBuf[2] = (0x0 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2899	pbBuf[3] = 0; /* Additional length */
2900
2901	return 4;
2902	}
2903
2904	static DECLCALLBACK(uint32_t) atapiR3GetConfigurationFillFeatureTimeout(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf)
2905	{
2906	RT_NOREF(s);
2907	if (cbBuf < 8)
2908	return 0;
2909
2910	scsiH2BE_U16(pbBuf, 0x105); /* feature 0105h: Timeout Feature */
2911	pbBuf[2] = (0x0 << 2) \| RT_BIT(1) \| RT_BIT(0); /* Version \| Persistent \| Current */
2912	pbBuf[3] = 4; /* Additional length */
2913	pbBuf[4] = 0x0; /* !Group3 */
2914
2915	return 8;
2916	}
2917
2918	/**
2919	* Callback to fill in the correct data for a feature.
2920	*
2921	* @returns Number of bytes written into the buffer.
2922	* @param s The ATA device state.
2923	* @param pbBuf The buffer to fill the data with.
2924	* @param cbBuf Size of the buffer.
2925	*/
2926	typedef DECLCALLBACKTYPE(uint32_t, FNATAPIR3FEATUREFILL,(PATADEVSTATE s, uint8_t *pbBuf, size_t cbBuf));
2927	/** Pointer to a feature fill callback. */
2928	typedef FNATAPIR3FEATUREFILL *PFNATAPIR3FEATUREFILL;
2929
2930	/**
2931	* ATAPI feature descriptor.
2932	*/
2933	typedef struct ATAPIR3FEATDESC
2934	{
2935	/** The feature number. */
2936	uint16_t u16Feat;
2937	/** The callback to fill in the correct data. */
2938	PFNATAPIR3FEATUREFILL pfnFeatureFill;
2939	} ATAPIR3FEATDESC;
2940
2941	/**
2942	* Array of known ATAPI feature descriptors.
2943	*/
2944	static const ATAPIR3FEATDESC s_aAtapiR3Features[] =
2945	{
2946	{ 0x0000, atapiR3GetConfigurationFillFeatureListProfiles},
2947	{ 0x0001, atapiR3GetConfigurationFillFeatureCore},
2948	{ 0x0002, atapiR3GetConfigurationFillFeatureMorphing},
2949	{ 0x0003, atapiR3GetConfigurationFillFeatureRemovableMedium},
2950	{ 0x0010, atapiR3GetConfigurationFillFeatureRandomReadable},
2951	{ 0x001e, atapiR3GetConfigurationFillFeatureCDRead},
2952	{ 0x0100, atapiR3GetConfigurationFillFeaturePowerManagement},
2953	{ 0x0105, atapiR3GetConfigurationFillFeatureTimeout}
2954	};
2955
2956	/**
2957	* Sink/Source: ATAPI GET CONFIGURATION
2958	*/
2959	static bool atapiR3GetConfigurationSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
2960	{
2961	uint32_t const cbIOBuffer = RT_MIN(s->cbIOBuffer, ATA_MAX_IO_BUFFER_SIZE);
2962	uint8_t *pbBuf = s->abIOBuffer;
2963	uint32_t cbBuf = cbIOBuffer;
2964	uint32_t cbCopied = 0;
2965	uint16_t u16Sfn = scsiBE2H_U16(&s->abATAPICmd[2]);
2966	uint8_t u8Rt = s->abATAPICmd[1] & 0x03;
2967	RT_NOREF(pDevIns, pDevR3);
2968
2969	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
2970	Assert(s->cbElementaryTransfer <= 80);
2971	/* Accept valid request types only. */
2972	if (u8Rt == 3)
2973	{
2974	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
2975	return false;
2976	}
2977	memset(pbBuf, '\0', cbBuf);
2978	/** @todo implement switching between CD-ROM and DVD-ROM profile (the only
2979	* way to differentiate them right now is based on the image size). */
2980	if (s->cTotalSectors)
2981	scsiH2BE_U16(pbBuf + 6, 0x08); /* current profile: read-only CD */
2982	else
2983	scsiH2BE_U16(pbBuf + 6, 0x00); /* current profile: none -> no media */
2984	cbBuf -= 8;
2985	pbBuf += 8;
2986
2987	if (u8Rt == 0x2)
2988	{
2989	for (uint32_t i = 0; i < RT_ELEMENTS(s_aAtapiR3Features); i++)
2990	{
2991	if (s_aAtapiR3Features[i].u16Feat == u16Sfn)
2992	{
2993	cbCopied = s_aAtapiR3Features[i].pfnFeatureFill(s, pbBuf, cbBuf);
2994	cbBuf -= cbCopied;
2995	pbBuf += cbCopied;
2996	break;
2997	}
2998	}
2999	}
3000	else
3001	{
3002	for (uint32_t i = 0; i < RT_ELEMENTS(s_aAtapiR3Features); i++)
3003	{
3004	if (s_aAtapiR3Features[i].u16Feat > u16Sfn)
3005	{
3006	cbCopied = s_aAtapiR3Features[i].pfnFeatureFill(s, pbBuf, cbBuf);
3007	cbBuf -= cbCopied;
3008	pbBuf += cbCopied;
3009	}
3010	}
3011	}
3012
3013	/* Set data length now - the field is not included in the final length. */
3014	scsiH2BE_U32(s->abIOBuffer, cbIOBuffer - cbBuf - 4);
3015
3016	/* Other profiles we might want to add in the future: 0x40 (BD-ROM) and 0x50 (HDDVD-ROM) */
3017	s->iSourceSink = ATAFN_SS_NULL;
3018	atapiR3CmdOK(pCtl, s);
3019	return false;
3020	}
3021
3022
3023	/**
3024	* Sink/Source: ATAPI GET EVENT STATUS NOTIFICATION
3025	*/
3026	static bool atapiR3GetEventStatusNotificationSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3027	{
3028	uint8_t *pbBuf = s->abIOBuffer;
3029	RT_NOREF(pDevIns, pDevR3);
3030
3031	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3032	Assert(s->cbElementaryTransfer <= 8);
3033
3034	if (!(s->abATAPICmd[1] & 1))
3035	{
3036	/* no asynchronous operation supported */
3037	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3038	return false;
3039	}
3040
3041	uint32_t OldStatus, NewStatus;
3042	do
3043	{
3044	OldStatus = ASMAtomicReadU32(&s->MediaEventStatus);
3045	NewStatus = ATA_EVENT_STATUS_UNCHANGED;
3046	switch (OldStatus)
3047	{
3048	case ATA_EVENT_STATUS_MEDIA_NEW:
3049	/* mount */
3050	scsiH2BE_U16(pbBuf + 0, 6);
3051	pbBuf[2] = 0x04; /* media */
3052	pbBuf[3] = 0x5e; /* supported = busy\|media\|external\|power\|operational */
3053	pbBuf[4] = 0x02; /* new medium */
3054	pbBuf[5] = 0x02; /* medium present / door closed */
3055	pbBuf[6] = 0x00;
3056	pbBuf[7] = 0x00;
3057	break;
3058
3059	case ATA_EVENT_STATUS_MEDIA_CHANGED:
3060	case ATA_EVENT_STATUS_MEDIA_REMOVED:
3061	/* umount */
3062	scsiH2BE_U16(pbBuf + 0, 6);
3063	pbBuf[2] = 0x04; /* media */
3064	pbBuf[3] = 0x5e; /* supported = busy\|media\|external\|power\|operational */
3065	pbBuf[4] = OldStatus == ATA_EVENT_STATUS_MEDIA_CHANGED ? 0x04 /* media changed / : 0x03; / media removed */
3066	pbBuf[5] = 0x00; /* medium absent / door closed */
3067	pbBuf[6] = 0x00;
3068	pbBuf[7] = 0x00;
3069	if (OldStatus == ATA_EVENT_STATUS_MEDIA_CHANGED)
3070	NewStatus = ATA_EVENT_STATUS_MEDIA_NEW;
3071	break;
3072
3073	case ATA_EVENT_STATUS_MEDIA_EJECT_REQUESTED: /* currently unused */
3074	scsiH2BE_U16(pbBuf + 0, 6);
3075	pbBuf[2] = 0x04; /* media */
3076	pbBuf[3] = 0x5e; /* supported = busy\|media\|external\|power\|operational */
3077	pbBuf[4] = 0x01; /* eject requested (eject button pressed) */
3078	pbBuf[5] = 0x02; /* medium present / door closed */
3079	pbBuf[6] = 0x00;
3080	pbBuf[7] = 0x00;
3081	break;
3082
3083	case ATA_EVENT_STATUS_UNCHANGED:
3084	default:
3085	scsiH2BE_U16(pbBuf + 0, 6);
3086	pbBuf[2] = 0x01; /* operational change request / notification */
3087	pbBuf[3] = 0x5e; /* supported = busy\|media\|external\|power\|operational */
3088	pbBuf[4] = 0x00;
3089	pbBuf[5] = 0x00;
3090	pbBuf[6] = 0x00;
3091	pbBuf[7] = 0x00;
3092	break;
3093	}
3094	} while (!ASMAtomicCmpXchgU32(&s->MediaEventStatus, NewStatus, OldStatus));
3095
3096	s->iSourceSink = ATAFN_SS_NULL;
3097	atapiR3CmdOK(pCtl, s);
3098	return false;
3099	}
3100
3101
3102	/**
3103	* Sink/Source: ATAPI INQUIRY
3104	*/
3105	static bool atapiR3InquirySS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3106	{
3107	uint8_t *pbBuf = s->abIOBuffer;
3108	RT_NOREF(pDevIns, pDevR3);
3109
3110	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3111	Assert(s->cbElementaryTransfer <= 36);
3112	pbBuf[0] = 0x05; /* CD-ROM */
3113	pbBuf[1] = 0x80; /* removable */
3114	# if 1/ndef VBOX/ /** @todo implement MESN + AENC. (async notification on removal and stuff.) */
3115	pbBuf[2] = 0x00; /* ISO */
3116	pbBuf[3] = 0x21; /* ATAPI-2 (XXX: put ATAPI-4 ?) */
3117	# else
3118	pbBuf[2] = 0x00; /* ISO */
3119	pbBuf[3] = 0x91; /* format 1, MESN=1, AENC=9 ??? */
3120	# endif
3121	pbBuf[4] = 31; /* additional length */
3122	pbBuf[5] = 0; /* reserved */
3123	pbBuf[6] = 0; /* reserved */
3124	pbBuf[7] = 0; /* reserved */
3125	scsiPadStr(pbBuf + 8, s->szInquiryVendorId, 8);
3126	scsiPadStr(pbBuf + 16, s->szInquiryProductId, 16);
3127	scsiPadStr(pbBuf + 32, s->szInquiryRevision, 4);
3128	s->iSourceSink = ATAFN_SS_NULL;
3129	atapiR3CmdOK(pCtl, s);
3130	return false;
3131	}
3132
3133
3134	/**
3135	* Sink/Source: ATAPI MODE SENSE ERROR RECOVERY
3136	*/
3137	static bool atapiR3ModeSenseErrorRecoverySS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3138	{
3139	uint8_t *pbBuf = s->abIOBuffer;
3140	RT_NOREF(pDevIns, pDevR3);
3141
3142	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3143	Assert(s->cbElementaryTransfer <= 16);
3144	scsiH2BE_U16(&pbBuf[0], 16 + 6);
3145	pbBuf[2] = (uint8_t)s->MediaTrackType;
3146	pbBuf[3] = 0;
3147	pbBuf[4] = 0;
3148	pbBuf[5] = 0;
3149	pbBuf[6] = 0;
3150	pbBuf[7] = 0;
3151
3152	pbBuf[8] = 0x01;
3153	pbBuf[9] = 0x06;
3154	pbBuf[10] = 0x00; /* Maximum error recovery */
3155	pbBuf[11] = 0x05; /* 5 retries */
3156	pbBuf[12] = 0x00;
3157	pbBuf[13] = 0x00;
3158	pbBuf[14] = 0x00;
3159	pbBuf[15] = 0x00;
3160	s->iSourceSink = ATAFN_SS_NULL;
3161	atapiR3CmdOK(pCtl, s);
3162	return false;
3163	}
3164
3165
3166	/**
3167	* Sink/Source: ATAPI MODE SENSE CD STATUS
3168	*/
3169	static bool atapiR3ModeSenseCDStatusSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3170	{
3171	uint8_t *pbBuf = s->abIOBuffer;
3172	RT_NOREF(pDevIns);
3173
3174	/* 28 bytes of total returned data corresponds to ATAPI 2.6. Note that at least some versions
3175	* of NEC_IDE.SYS DOS driver (possibly other Oak Technology OTI-011 drivers) do not correctly
3176	* handle cases where more than 28 bytes are returned due to bugs. See @bugref{5869}.
3177	*/
3178	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3179	Assert(s->cbElementaryTransfer <= 28);
3180	scsiH2BE_U16(&pbBuf[0], 26);
3181	pbBuf[2] = (uint8_t)s->MediaTrackType;
3182	pbBuf[3] = 0;
3183	pbBuf[4] = 0;
3184	pbBuf[5] = 0;
3185	pbBuf[6] = 0;
3186	pbBuf[7] = 0;
3187
3188	pbBuf[8] = 0x2a;
3189	pbBuf[9] = 18; /* page length */
3190	pbBuf[10] = 0x08; /* DVD-ROM read support */
3191	pbBuf[11] = 0x00; /* no write support */
3192	/* The following claims we support audio play. This is obviously false,
3193	* but the Linux generic CDROM support makes many features depend on this
3194	* capability. If it's not set, this causes many things to be disabled. */
3195	pbBuf[12] = 0x71; /* multisession support, mode 2 form 1/2 support, audio play */
3196	pbBuf[13] = 0x00; /* no subchannel reads supported */
3197	pbBuf[14] = (1 << 0) \| (1 << 3) \| (1 << 5); /* lock supported, eject supported, tray type loading mechanism */
3198	if (pDevR3->pDrvMount && pDevR3->pDrvMount->pfnIsLocked(pDevR3->pDrvMount))
3199	pbBuf[14] \|= 1 << 1; /* report lock state */
3200	pbBuf[15] = 0; /* no subchannel reads supported, no separate audio volume control, no changer etc. */
3201	scsiH2BE_U16(&pbBuf[16], 5632); /* (obsolete) claim 32x speed support */
3202	scsiH2BE_U16(&pbBuf[18], 2); /* number of audio volume levels */
3203	scsiH2BE_U16(&pbBuf[20], RT_MIN(s->cbIOBuffer, ATA_MAX_IO_BUFFER_SIZE) / _1K); /* buffer size supported in Kbyte */
3204	scsiH2BE_U16(&pbBuf[22], 5632); /* (obsolete) current read speed 32x */
3205	pbBuf[24] = 0; /* reserved */
3206	pbBuf[25] = 0; /* reserved for digital audio (see idx 15) */
3207	pbBuf[26] = 0; /* reserved */
3208	pbBuf[27] = 0; /* reserved */
3209	s->iSourceSink = ATAFN_SS_NULL;
3210	atapiR3CmdOK(pCtl, s);
3211	return false;
3212	}
3213
3214
3215	/**
3216	* Sink/Source: ATAPI REQUEST SENSE
3217	*/
3218	static bool atapiR3RequestSenseSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3219	{
3220	uint8_t *pbBuf = s->abIOBuffer;
3221	RT_NOREF(pDevIns, pDevR3);
3222
3223	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3224	memset(pbBuf, '\0', RT_MIN(s->cbElementaryTransfer, sizeof(s->abIOBuffer)));
3225	AssertCompile(sizeof(s->abIOBuffer) >= sizeof(s->abATAPISense));
3226	memcpy(pbBuf, s->abATAPISense, RT_MIN(s->cbElementaryTransfer, sizeof(s->abATAPISense)));
3227	s->iSourceSink = ATAFN_SS_NULL;
3228	atapiR3CmdOK(pCtl, s);
3229	return false;
3230	}
3231
3232
3233	/**
3234	* Sink/Source: ATAPI MECHANISM STATUS
3235	*/
3236	static bool atapiR3MechanismStatusSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3237	{
3238	uint8_t *pbBuf = s->abIOBuffer;
3239	RT_NOREF(pDevIns, pDevR3);
3240
3241	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3242	Assert(s->cbElementaryTransfer <= 8);
3243	scsiH2BE_U16(pbBuf, 0);
3244	/* no current LBA */
3245	pbBuf[2] = 0;
3246	pbBuf[3] = 0;
3247	pbBuf[4] = 0;
3248	pbBuf[5] = 1;
3249	scsiH2BE_U16(pbBuf + 6, 0);
3250	s->iSourceSink = ATAFN_SS_NULL;
3251	atapiR3CmdOK(pCtl, s);
3252	return false;
3253	}
3254
3255
3256	/**
3257	* Sink/Source: ATAPI READ TOC NORMAL
3258	*/
3259	static bool atapiR3ReadTOCNormalSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3260	{
3261	uint8_t *pbBuf = s->abIOBuffer;
3262	uint8_t *q;
3263	uint8_t iStartTrack;
3264	bool fMSF;
3265	uint32_t cbSize;
3266	RT_NOREF(pDevIns);
3267
3268	/* Track fields are 8-bit and 1-based, so cut the track count at 255,
3269	avoiding any potential buffer overflow issues below. */
3270	uint32_t cTracks = pDevR3->pDrvMedia->pfnGetRegionCount(pDevR3->pDrvMedia);
3271	AssertStmt(cTracks <= UINT8_MAX, cTracks = UINT8_MAX);
3272	AssertCompile(sizeof(s->abIOBuffer) >= 2 + 256 + 8);
3273
3274	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3275	fMSF = (s->abATAPICmd[1] >> 1) & 1;
3276	iStartTrack = s->abATAPICmd[6];
3277	if (iStartTrack == 0)
3278	iStartTrack = 1;
3279
3280	if (iStartTrack > cTracks && iStartTrack != 0xaa)
3281	{
3282	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3283	return false;
3284	}
3285	q = pbBuf + 2;
3286	q++ = iStartTrack; / first track number */
3287	q++ = cTracks; / last track number */
3288	for (uint32_t iTrack = iStartTrack; iTrack <= cTracks; iTrack++)
3289	{
3290	uint64_t uLbaStart = 0;
3291	VDREGIONDATAFORM enmDataForm = VDREGIONDATAFORM_MODE1_2048;
3292
3293	int rc = pDevR3->pDrvMedia->pfnQueryRegionProperties(pDevR3->pDrvMedia, iTrack - 1, &uLbaStart,
3294	NULL, NULL, &enmDataForm);
3295	AssertRC(rc);
3296
3297	q++ = 0; / reserved */
3298
3299	if (enmDataForm == VDREGIONDATAFORM_CDDA)
3300	q++ = 0x10; / ADR, control */
3301	else
3302	q++ = 0x14; / ADR, control */
3303
3304	q++ = (uint8_t)iTrack; / track number */
3305	q++ = 0; / reserved */
3306	if (fMSF)
3307	{
3308	q++ = 0; / reserved */
3309	scsiLBA2MSF(q, (uint32_t)uLbaStart);
3310	q += 3;
3311	}
3312	else
3313	{
3314	/* sector 0 */
3315	scsiH2BE_U32(q, (uint32_t)uLbaStart);
3316	q += 4;
3317	}
3318	}
3319	/* lead out track */
3320	q++ = 0; / reserved */
3321	q++ = 0x14; / ADR, control */
3322	q++ = 0xaa; / track number */
3323	q++ = 0; / reserved */
3324
3325	/* Query start and length of last track to get the start of the lead out track. */
3326	uint64_t uLbaStart = 0;
3327	uint64_t cBlocks = 0;
3328
3329	int rc = pDevR3->pDrvMedia->pfnQueryRegionProperties(pDevR3->pDrvMedia, cTracks - 1, &uLbaStart,
3330	&cBlocks, NULL, NULL);
3331	AssertRC(rc);
3332
3333	uLbaStart += cBlocks;
3334	if (fMSF)
3335	{
3336	q++ = 0; / reserved */
3337	scsiLBA2MSF(q, (uint32_t)uLbaStart);
3338	q += 3;
3339	}
3340	else
3341	{
3342	scsiH2BE_U32(q, (uint32_t)uLbaStart);
3343	q += 4;
3344	}
3345	cbSize = q - pbBuf;
3346	scsiH2BE_U16(pbBuf, cbSize - 2);
3347	if (cbSize < s->cbTotalTransfer)
3348	s->cbTotalTransfer = cbSize;
3349	s->iSourceSink = ATAFN_SS_NULL;
3350	atapiR3CmdOK(pCtl, s);
3351	return false;
3352	}
3353
3354
3355	/**
3356	* Sink/Source: ATAPI READ TOC MULTI
3357	*/
3358	static bool atapiR3ReadTOCMultiSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3359	{
3360	uint8_t *pbBuf = s->abIOBuffer;
3361	bool fMSF;
3362	RT_NOREF(pDevIns);
3363
3364	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3365	Assert(s->cbElementaryTransfer <= 12);
3366	fMSF = (s->abATAPICmd[1] >> 1) & 1;
3367	/* multi session: only a single session defined */
3368	/** @todo double-check this stuff against what a real drive says for a CD-ROM (not a CD-R)
3369	* with only a single data session. Maybe solve the problem with "cdrdao read-toc" not being
3370	* able to figure out whether numbers are in BCD or hex. */
3371	memset(pbBuf, 0, 12);
3372	pbBuf[1] = 0x0a;
3373	pbBuf[2] = 0x01;
3374	pbBuf[3] = 0x01;
3375
3376	VDREGIONDATAFORM enmDataForm = VDREGIONDATAFORM_MODE1_2048;
3377	int rc = pDevR3->pDrvMedia->pfnQueryRegionProperties(pDevR3->pDrvMedia, 0, NULL, NULL, NULL, &enmDataForm);
3378	AssertRC(rc);
3379
3380	if (enmDataForm == VDREGIONDATAFORM_CDDA)
3381	pbBuf[5] = 0x10; /* ADR, control */
3382	else
3383	pbBuf[5] = 0x14; /* ADR, control */
3384
3385	pbBuf[6] = 1; /* first track in last complete session */
3386	if (fMSF)
3387	{
3388	pbBuf[8] = 0; /* reserved */
3389	scsiLBA2MSF(&pbBuf[9], 0);
3390	}
3391	else
3392	{
3393	/* sector 0 */
3394	scsiH2BE_U32(pbBuf + 8, 0);
3395	}
3396	s->iSourceSink = ATAFN_SS_NULL;
3397	atapiR3CmdOK(pCtl, s);
3398	return false;
3399	}
3400
3401
3402	/**
3403	* Sink/Source: ATAPI READ TOC RAW
3404	*/
3405	static bool atapiR3ReadTOCRawSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3406	{
3407	uint8_t *pbBuf = s->abIOBuffer;
3408	uint8_t *q;
3409	uint8_t iStartTrack;
3410	bool fMSF;
3411	uint32_t cbSize;
3412	RT_NOREF(pDevIns, pDevR3);
3413
3414	Assert(s->uTxDir == PDMMEDIATXDIR_FROM_DEVICE);
3415	fMSF = (s->abATAPICmd[1] >> 1) & 1;
3416	iStartTrack = s->abATAPICmd[6];
3417
3418	q = pbBuf + 2;
3419	q++ = 1; / first session */
3420	q++ = 1; / last session */
3421
3422	q++ = 1; / session number */
3423	q++ = 0x14; / data track */
3424	q++ = 0; / track number */
3425	q++ = 0xa0; / first track in program area */
3426	q++ = 0; / min */
3427	q++ = 0; / sec */
3428	q++ = 0; / frame */
3429	*q++ = 0;
3430	q++ = 1; / first track */
3431	q++ = 0x00; / disk type CD-DA or CD data */
3432	*q++ = 0;
3433
3434	q++ = 1; / session number */
3435	q++ = 0x14; / data track */
3436	q++ = 0; / track number */
3437	q++ = 0xa1; / last track in program area */
3438	q++ = 0; / min */
3439	q++ = 0; / sec */
3440	q++ = 0; / frame */
3441	*q++ = 0;
3442	q++ = 1; / last track */
3443	*q++ = 0;
3444	*q++ = 0;
3445
3446	q++ = 1; / session number */
3447	q++ = 0x14; / data track */
3448	q++ = 0; / track number */
3449	q++ = 0xa2; / lead-out */
3450	q++ = 0; / min */
3451	q++ = 0; / sec */
3452	q++ = 0; / frame */
3453	if (fMSF)
3454	{
3455	q++ = 0; / reserved */
3456	scsiLBA2MSF(q, s->cTotalSectors);
3457	q += 3;
3458	}
3459	else
3460	{
3461	scsiH2BE_U32(q, s->cTotalSectors);
3462	q += 4;
3463	}
3464
3465	q++ = 1; / session number */
3466	q++ = 0x14; / ADR, control */
3467	q++ = 0; / track number */
3468	q++ = 1; / point */
3469	q++ = 0; / min */
3470	q++ = 0; / sec */
3471	q++ = 0; / frame */
3472	if (fMSF)
3473	{
3474	q++ = 0; / reserved */
3475	scsiLBA2MSF(q, 0);
3476	q += 3;
3477	}
3478	else
3479	{
3480	/* sector 0 */
3481	scsiH2BE_U32(q, 0);
3482	q += 4;
3483	}
3484
3485	cbSize = q - pbBuf;
3486	scsiH2BE_U16(pbBuf, cbSize - 2);
3487	if (cbSize < s->cbTotalTransfer)
3488	s->cbTotalTransfer = cbSize;
3489	s->iSourceSink = ATAFN_SS_NULL;
3490	atapiR3CmdOK(pCtl, s);
3491	return false;
3492	}
3493
3494
3495	static void atapiR3ParseCmdVirtualATAPI(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3496	{
3497	const uint8_t *pbPacket = s->abATAPICmd;
3498	uint32_t cbMax;
3499	uint32_t cSectors, iATAPILBA;
3500
3501	switch (pbPacket[0])
3502	{
3503	case SCSI_TEST_UNIT_READY:
3504	if (s->cNotifiedMediaChange > 0)
3505	{
3506	if (s->cNotifiedMediaChange-- > 2)
3507	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3508	else
3509	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3510	}
3511	else
3512	{
3513	PPDMIMOUNT const pDrvMount = pDevR3->pDrvMount;
3514	if (pDrvMount && pDrvMount->pfnIsMounted(pDrvMount))
3515	atapiR3CmdOK(pCtl, s);
3516	else
3517	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3518	}
3519	break;
3520	case SCSI_GET_EVENT_STATUS_NOTIFICATION:
3521	cbMax = scsiBE2H_U16(pbPacket + 7);
3522	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 8), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_GET_EVENT_STATUS_NOTIFICATION, true);
3523	break;
3524	case SCSI_MODE_SENSE_10:
3525	{
3526	uint8_t uPageControl, uPageCode;
3527	cbMax = scsiBE2H_U16(pbPacket + 7);
3528	uPageControl = pbPacket[2] >> 6;
3529	uPageCode = pbPacket[2] & 0x3f;
3530	switch (uPageControl)
3531	{
3532	case SCSI_PAGECONTROL_CURRENT:
3533	switch (uPageCode)
3534	{
3535	case SCSI_MODEPAGE_ERROR_RECOVERY:
3536	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 16), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_MODE_SENSE_ERROR_RECOVERY, true);
3537	break;
3538	case SCSI_MODEPAGE_CD_STATUS:
3539	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 28), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_MODE_SENSE_CD_STATUS, true);
3540	break;
3541	default:
3542	goto error_cmd;
3543	}
3544	break;
3545	case SCSI_PAGECONTROL_CHANGEABLE:
3546	goto error_cmd;
3547	case SCSI_PAGECONTROL_DEFAULT:
3548	goto error_cmd;
3549	default:
3550	case SCSI_PAGECONTROL_SAVED:
3551	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_SAVING_PARAMETERS_NOT_SUPPORTED);
3552	break;
3553	}
3554	break;
3555	}
3556	case SCSI_REQUEST_SENSE:
3557	cbMax = pbPacket[4];
3558	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 18), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_REQUEST_SENSE, true);
3559	break;
3560	case SCSI_PREVENT_ALLOW_MEDIUM_REMOVAL:
3561	{
3562	PPDMIMOUNT const pDrvMount = pDevR3->pDrvMount;
3563	if (pDrvMount && pDrvMount->pfnIsMounted(pDrvMount))
3564	{
3565	if (pbPacket[4] & 1)
3566	pDrvMount->pfnLock(pDrvMount);
3567	else
3568	pDrvMount->pfnUnlock(pDrvMount);
3569	atapiR3CmdOK(pCtl, s);
3570	}
3571	else
3572	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3573	break;
3574	}
3575	case SCSI_READ_10:
3576	case SCSI_READ_12:
3577	{
3578	if (s->cNotifiedMediaChange > 0)
3579	{
3580	s->cNotifiedMediaChange-- ;
3581	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3582	break;
3583	}
3584	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3585	{
3586	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3587	break;
3588	}
3589	if (pbPacket[0] == SCSI_READ_10)
3590	cSectors = scsiBE2H_U16(pbPacket + 7);
3591	else
3592	cSectors = scsiBE2H_U32(pbPacket + 6);
3593	iATAPILBA = scsiBE2H_U32(pbPacket + 2);
3594
3595	if (cSectors == 0)
3596	{
3597	atapiR3CmdOK(pCtl, s);
3598	break;
3599	}
3600
3601	/* Check that the sector size is valid. */
3602	VDREGIONDATAFORM enmDataForm = VDREGIONDATAFORM_INVALID;
3603	int rc = pDevR3->pDrvMedia->pfnQueryRegionPropertiesForLba(pDevR3->pDrvMedia, iATAPILBA,
3604	NULL, NULL, NULL, &enmDataForm);
3605	if (RT_UNLIKELY( rc == VERR_NOT_FOUND
3606	\|\| ((uint64_t)iATAPILBA + cSectors > s->cTotalSectors)))
3607	{
3608	/* Rate limited logging, one log line per second. For
3609	* guests that insist on reading from places outside the
3610	* valid area this often generates too many release log
3611	* entries otherwise. */
3612	static uint64_t uLastLogTS = 0;
3613	if (RTTimeMilliTS() >= uLastLogTS + 1000)
3614	{
3615	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM block number %Ld invalid (READ)\n", s->iLUN, (uint64_t)iATAPILBA + cSectors));
3616	uLastLogTS = RTTimeMilliTS();
3617	}
3618	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_LOGICAL_BLOCK_OOR);
3619	break;
3620	}
3621	else if ( enmDataForm != VDREGIONDATAFORM_MODE1_2048
3622	&& enmDataForm != VDREGIONDATAFORM_MODE1_2352
3623	&& enmDataForm != VDREGIONDATAFORM_MODE2_2336
3624	&& enmDataForm != VDREGIONDATAFORM_MODE2_2352
3625	&& enmDataForm != VDREGIONDATAFORM_RAW)
3626	{
3627	uint8_t abATAPISense[ATAPI_SENSE_SIZE];
3628	RT_ZERO(abATAPISense);
3629
3630	abATAPISense[0] = 0x70 \| (1 << 7);
3631	abATAPISense[2] = (SCSI_SENSE_ILLEGAL_REQUEST & 0x0f) \| SCSI_SENSE_FLAG_ILI;
3632	scsiH2BE_U32(&abATAPISense[3], iATAPILBA);
3633	abATAPISense[7] = 10;
3634	abATAPISense[12] = SCSI_ASC_ILLEGAL_MODE_FOR_THIS_TRACK;
3635	atapiR3CmdError(pCtl, s, &abATAPISense[0], sizeof(abATAPISense));
3636	break;
3637	}
3638	atapiR3ReadSectors(pDevIns, pCtl, s, iATAPILBA, cSectors, 2048);
3639	break;
3640	}
3641	case SCSI_READ_CD_MSF:
3642	case SCSI_READ_CD:
3643	{
3644	if (s->cNotifiedMediaChange > 0)
3645	{
3646	s->cNotifiedMediaChange-- ;
3647	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3648	break;
3649	}
3650	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3651	{
3652	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3653	break;
3654	}
3655	if ((pbPacket[10] & 0x7) != 0)
3656	{
3657	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3658	break;
3659	}
3660	if (pbPacket[0] == SCSI_READ_CD)
3661	{
3662	cSectors = (pbPacket[6] << 16) \| (pbPacket[7] << 8) \| pbPacket[8];
3663	iATAPILBA = scsiBE2H_U32(pbPacket + 2);
3664	}
3665	else /* READ CD MSF */
3666	{
3667	iATAPILBA = scsiMSF2LBA(pbPacket + 3);
3668	if (iATAPILBA > scsiMSF2LBA(pbPacket + 6))
3669	{
3670	Log2(("Start MSF %02u:%02u:%02u > end MSF %02u:%02u:%02u!\n", (pbPacket + 3), (pbPacket + 4), *(pbPacket + 5),
3671	(pbPacket + 6), (pbPacket + 7), *(pbPacket + 8)));
3672	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3673	break;
3674	}
3675	cSectors = scsiMSF2LBA(pbPacket + 6) - iATAPILBA;
3676	Log2(("Start MSF %02u:%02u:%02u -> LBA %u\n", (pbPacket + 3), (pbPacket + 4), *(pbPacket + 5), iATAPILBA));
3677	Log2(("End MSF %02u:%02u:%02u -> %u sectors\n", (pbPacket + 6), (pbPacket + 7), *(pbPacket + 8), cSectors));
3678	}
3679	if (cSectors == 0)
3680	{
3681	atapiR3CmdOK(pCtl, s);
3682	break;
3683	}
3684	if ((uint64_t)iATAPILBA + cSectors > s->cTotalSectors)
3685	{
3686	/* Rate limited logging, one log line per second. For
3687	* guests that insist on reading from places outside the
3688	* valid area this often generates too many release log
3689	* entries otherwise. */
3690	static uint64_t uLastLogTS = 0;
3691	if (RTTimeMilliTS() >= uLastLogTS + 1000)
3692	{
3693	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM block number %Ld invalid (READ CD)\n", s->iLUN, (uint64_t)iATAPILBA + cSectors));
3694	uLastLogTS = RTTimeMilliTS();
3695	}
3696	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_LOGICAL_BLOCK_OOR);
3697	break;
3698	}
3699	/*
3700	* If the LBA is in an audio track we are required to ignore pretty much all
3701	* of the channel selection values (except 0x00) and map everything to 0x10
3702	* which means read user data with a sector size of 2352 bytes.
3703	*
3704	* (MMC-6 chapter 6.19.2.6)
3705	*/
3706	uint8_t uChnSel = pbPacket[9] & 0xf8;
3707	VDREGIONDATAFORM enmDataForm;
3708	int rc = pDevR3->pDrvMedia->pfnQueryRegionPropertiesForLba(pDevR3->pDrvMedia, iATAPILBA,
3709	NULL, NULL, NULL, &enmDataForm);
3710	AssertRC(rc);
3711
3712	if (enmDataForm == VDREGIONDATAFORM_CDDA)
3713	{
3714	if (uChnSel == 0)
3715	{
3716	/* nothing */
3717	atapiR3CmdOK(pCtl, s);
3718	}
3719	else
3720	atapiR3ReadSectors(pDevIns, pCtl, s, iATAPILBA, cSectors, 2352);
3721	}
3722	else
3723	{
3724	switch (uChnSel)
3725	{
3726	case 0x00:
3727	/* nothing */
3728	atapiR3CmdOK(pCtl, s);
3729	break;
3730	case 0x10:
3731	/* normal read */
3732	atapiR3ReadSectors(pDevIns, pCtl, s, iATAPILBA, cSectors, 2048);
3733	break;
3734	case 0xf8:
3735	/* read all data */
3736	atapiR3ReadSectors(pDevIns, pCtl, s, iATAPILBA, cSectors, 2352);
3737	break;
3738	default:
3739	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM sector format not supported (%#x)\n", s->iLUN, pbPacket[9] & 0xf8));
3740	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3741	break;
3742	}
3743	}
3744	break;
3745	}
3746	case SCSI_SEEK_10:
3747	{
3748	if (s->cNotifiedMediaChange > 0)
3749	{
3750	s->cNotifiedMediaChange-- ;
3751	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3752	break;
3753	}
3754	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3755	{
3756	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3757	break;
3758	}
3759	iATAPILBA = scsiBE2H_U32(pbPacket + 2);
3760	if (iATAPILBA > s->cTotalSectors)
3761	{
3762	/* Rate limited logging, one log line per second. For
3763	* guests that insist on seeking to places outside the
3764	* valid area this often generates too many release log
3765	* entries otherwise. */
3766	static uint64_t uLastLogTS = 0;
3767	if (RTTimeMilliTS() >= uLastLogTS + 1000)
3768	{
3769	LogRel(("PIIX3 ATA: LUN#%d: CD-ROM block number %Ld invalid (SEEK)\n", s->iLUN, (uint64_t)iATAPILBA));
3770	uLastLogTS = RTTimeMilliTS();
3771	}
3772	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_LOGICAL_BLOCK_OOR);
3773	break;
3774	}
3775	atapiR3CmdOK(pCtl, s);
3776	ataSetStatus(pCtl, s, ATA_STAT_SEEK); /* Linux expects this. Required by ATAPI 2.x when seek completes. */
3777	break;
3778	}
3779	case SCSI_START_STOP_UNIT:
3780	{
3781	int rc = VINF_SUCCESS;
3782	switch (pbPacket[4] & 3)
3783	{
3784	case 0: /* 00 - Stop motor */
3785	case 1: /* 01 - Start motor */
3786	break;
3787	case 2: /* 10 - Eject media */
3788	{
3789	/* This must be done from EMT. */
3790	PATASTATER3 pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PATASTATER3);
3791	PPDMIMOUNT pDrvMount = pDevR3->pDrvMount;
3792	if (pDrvMount)
3793	{
3794	ataR3LockLeave(pDevIns, pCtl);
3795
3796	rc = PDMDevHlpVMReqPriorityCallWait(pDevIns, VMCPUID_ANY,
3797	(PFNRT)pDrvMount->pfnUnmount, 3,
3798	pDrvMount, false /=fForce/, true /=fEject/);
3799	Assert(RT_SUCCESS(rc) \|\| rc == VERR_PDM_MEDIA_LOCKED \|\| rc == VERR_PDM_MEDIA_NOT_MOUNTED);
3800	if (RT_SUCCESS(rc) && pThisCC->pMediaNotify)
3801	{
3802	rc = PDMDevHlpVMReqCallNoWait(pDevIns, VMCPUID_ANY,
3803	(PFNRT)pThisCC->pMediaNotify->pfnEjected, 2,
3804	pThisCC->pMediaNotify, s->iLUN);
3805	AssertRC(rc);
3806	}
3807
3808	ataR3LockEnter(pDevIns, pCtl);
3809	}
3810	else
3811	rc = VINF_SUCCESS;
3812	break;
3813	}
3814	case 3: /* 11 - Load media */
3815	/** @todo rc = pDevR3->pDrvMount->pfnLoadMedia(pDevR3->pDrvMount) */
3816	break;
3817	}
3818	if (RT_SUCCESS(rc))
3819	{
3820	atapiR3CmdOK(pCtl, s);
3821	ataSetStatus(pCtl, s, ATA_STAT_SEEK); /* Needed by NT 3.51/4.0, see @bugref{5869}. */
3822	}
3823	else
3824	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIA_LOAD_OR_EJECT_FAILED);
3825	break;
3826	}
3827	case SCSI_MECHANISM_STATUS:
3828	{
3829	cbMax = scsiBE2H_U16(pbPacket + 8);
3830	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 8), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_MECHANISM_STATUS, true);
3831	break;
3832	}
3833	case SCSI_READ_TOC_PMA_ATIP:
3834	{
3835	uint8_t format;
3836
3837	if (s->cNotifiedMediaChange > 0)
3838	{
3839	s->cNotifiedMediaChange-- ;
3840	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3841	break;
3842	}
3843	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3844	{
3845	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3846	break;
3847	}
3848	cbMax = scsiBE2H_U16(pbPacket + 7);
3849	/* SCSI MMC-3 spec says format is at offset 2 (lower 4 bits),
3850	* but Linux kernel uses offset 9 (topmost 2 bits). Hope that
3851	* the other field is clear... */
3852	format = (pbPacket[2] & 0xf) \| (pbPacket[9] >> 6);
3853	switch (format)
3854	{
3855	case 0:
3856	ataR3StartTransfer(pDevIns, pCtl, s, cbMax, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_TOC_NORMAL, true);
3857	break;
3858	case 1:
3859	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 12), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_TOC_MULTI, true);
3860	break;
3861	case 2:
3862	ataR3StartTransfer(pDevIns, pCtl, s, cbMax, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_TOC_RAW, true);
3863	break;
3864	default:
3865	error_cmd:
3866	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_INV_FIELD_IN_CMD_PACKET);
3867	break;
3868	}
3869	break;
3870	}
3871	case SCSI_READ_CAPACITY:
3872	if (s->cNotifiedMediaChange > 0)
3873	{
3874	s->cNotifiedMediaChange-- ;
3875	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3876	break;
3877	}
3878	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3879	{
3880	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3881	break;
3882	}
3883	ataR3StartTransfer(pDevIns, pCtl, s, 8, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_CAPACITY, true);
3884	break;
3885	case SCSI_READ_DISC_INFORMATION:
3886	if (s->cNotifiedMediaChange > 0)
3887	{
3888	s->cNotifiedMediaChange-- ;
3889	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3890	break;
3891	}
3892	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3893	{
3894	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3895	break;
3896	}
3897	cbMax = scsiBE2H_U16(pbPacket + 7);
3898	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 34), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_DISC_INFORMATION, true);
3899	break;
3900	case SCSI_READ_TRACK_INFORMATION:
3901	if (s->cNotifiedMediaChange > 0)
3902	{
3903	s->cNotifiedMediaChange-- ;
3904	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_UNIT_ATTENTION, SCSI_ASC_MEDIUM_MAY_HAVE_CHANGED); /* media changed */
3905	break;
3906	}
3907	if (!pDevR3->pDrvMount \|\| !pDevR3->pDrvMount->pfnIsMounted(pDevR3->pDrvMount))
3908	{
3909	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT);
3910	break;
3911	}
3912	cbMax = scsiBE2H_U16(pbPacket + 7);
3913	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 36), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_TRACK_INFORMATION, true);
3914	break;
3915	case SCSI_GET_CONFIGURATION:
3916	/* No media change stuff here, it can confuse Linux guests. */
3917	cbMax = scsiBE2H_U16(pbPacket + 7);
3918	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 80), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_GET_CONFIGURATION, true);
3919	break;
3920	case SCSI_INQUIRY:
3921	cbMax = scsiBE2H_U16(pbPacket + 3);
3922	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 36), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_INQUIRY, true);
3923	break;
3924	case SCSI_READ_DVD_STRUCTURE:
3925	cbMax = scsiBE2H_U16(pbPacket + 8);
3926	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbMax, 4), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_READ_DVD_STRUCTURE, true);
3927	break;
3928	default:
3929	atapiR3CmdErrorSimple(pCtl, s, SCSI_SENSE_ILLEGAL_REQUEST, SCSI_ASC_ILLEGAL_OPCODE);
3930	break;
3931	}
3932	}
3933
3934
3935	/*
3936	* Parse ATAPI commands, passing them directly to the CD/DVD drive.
3937	*/
3938	static void atapiR3ParseCmdPassthrough(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
3939	{
3940	const uint8_t *pbPacket = &s->abATAPICmd[0];
3941
3942	/* Some cases we have to handle here. */
3943	if ( pbPacket[0] == SCSI_GET_EVENT_STATUS_NOTIFICATION
3944	&& ASMAtomicReadU32(&s->MediaEventStatus) != ATA_EVENT_STATUS_UNCHANGED)
3945	{
3946	uint32_t cbTransfer = scsiBE2H_U16(pbPacket + 7);
3947	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(cbTransfer, 8), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_GET_EVENT_STATUS_NOTIFICATION, true);
3948	}
3949	else if ( pbPacket[0] == SCSI_REQUEST_SENSE
3950	&& (s->abATAPISense[2] & 0x0f) != SCSI_SENSE_NONE)
3951	ataR3StartTransfer(pDevIns, pCtl, s, RT_MIN(pbPacket[4], 18), PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_ATAPI_CMD, ATAFN_SS_ATAPI_REQUEST_SENSE, true);
3952	else
3953	{
3954	size_t cbBuf = 0;
3955	size_t cbATAPISector = 0;
3956	size_t cbTransfer = 0;
3957	PDMMEDIATXDIR uTxDir = PDMMEDIATXDIR_NONE;
3958	uint8_t u8ScsiSts = SCSI_STATUS_OK;
3959
3960	if (pbPacket[0] == SCSI_FORMAT_UNIT \|\| pbPacket[0] == SCSI_GET_PERFORMANCE)
3961	cbBuf = s->uATARegLCyl \| (s->uATARegHCyl << 8); /* use ATAPI transfer length */
3962
3963	bool fPassthrough = ATAPIPassthroughParseCdb(pbPacket, sizeof(s->abATAPICmd), cbBuf, pDevR3->pTrackList,
3964	&s->abATAPISense[0], sizeof(s->abATAPISense), &uTxDir, &cbTransfer,
3965	&cbATAPISector, &u8ScsiSts);
3966	if (fPassthrough)
3967	{
3968	s->cbATAPISector = (uint32_t)cbATAPISector;
3969	Assert(s->cbATAPISector == (uint32_t)cbATAPISector);
3970	Assert(cbTransfer == (uint32_t)cbTransfer);
3971
3972	/*
3973	* Send a command to the drive, passing data in/out as required.
3974	* Commands which exceed the I/O buffer size are split below
3975	* or aborted if splitting is not implemented.
3976	*/
3977	Log2(("ATAPI PT: max size %d\n", cbTransfer));
3978	if (cbTransfer == 0)
3979	uTxDir = PDMMEDIATXDIR_NONE;
3980	ataR3StartTransfer(pDevIns, pCtl, s, (uint32_t)cbTransfer, uTxDir, ATAFN_BT_ATAPI_PASSTHROUGH_CMD, ATAFN_SS_ATAPI_PASSTHROUGH, true);
3981	}
3982	else if (u8ScsiSts == SCSI_STATUS_CHECK_CONDITION)
3983	{
3984	/* Sense data is already set, end the request and notify the guest. */
3985	Log(("%s: sense=%#x (%s) asc=%#x ascq=%#x (%s)\n", __FUNCTION__, s->abATAPISense[2] & 0x0f, SCSISenseText(s->abATAPISense[2] & 0x0f),
3986	s->abATAPISense[12], s->abATAPISense[13], SCSISenseExtText(s->abATAPISense[12], s->abATAPISense[13])));
3987	s->uATARegError = s->abATAPISense[2] << 4;
3988	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| ATA_STAT_ERR);
3989	s->uATARegNSector = (s->uATARegNSector & ~7) \| ATAPI_INT_REASON_IO \| ATAPI_INT_REASON_CD;
3990	Log2(("%s: interrupt reason %#04x\n", __FUNCTION__, s->uATARegNSector));
3991	s->cbTotalTransfer = 0;
3992	s->cbElementaryTransfer = 0;
3993	s->cbAtapiPassthroughTransfer = 0;
3994	s->iIOBufferCur = 0;
3995	s->iIOBufferEnd = 0;
3996	s->uTxDir = PDMMEDIATXDIR_NONE;
3997	s->iBeginTransfer = ATAFN_BT_NULL;
3998	s->iSourceSink = ATAFN_SS_NULL;
3999	}
4000	else if (u8ScsiSts == SCSI_STATUS_OK)
4001	atapiR3CmdOK(pCtl, s);
4002	}
4003	}
4004
4005
4006	static void atapiR3ParseCmd(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4007	{
4008	const uint8_t *pbPacket;
4009
4010	pbPacket = s->abATAPICmd;
4011	# ifdef DEBUG
4012	Log(("%s: LUN#%d DMA=%d CMD=%#04x \"%s\"\n", __FUNCTION__, s->iLUN, s->fDMA, pbPacket[0], SCSICmdText(pbPacket[0])));
4013	# else /* !DEBUG */
4014	Log(("%s: LUN#%d DMA=%d CMD=%#04x\n", __FUNCTION__, s->iLUN, s->fDMA, pbPacket[0]));
4015	# endif /* !DEBUG */
4016	Log2(("%s: limit=%#x packet: %.*Rhxs\n", __FUNCTION__, s->uATARegLCyl \| (s->uATARegHCyl << 8), ATAPI_PACKET_SIZE, pbPacket));
4017
4018	if (s->fATAPIPassthrough)
4019	atapiR3ParseCmdPassthrough(pDevIns, pCtl, s, pDevR3);
4020	else
4021	atapiR3ParseCmdVirtualATAPI(pDevIns, pCtl, s, pDevR3);
4022	}
4023
4024
4025	/**
4026	* Sink/Source: PACKET
4027	*/
4028	static bool ataR3PacketSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4029	{
4030	s->fDMA = !!(s->uATARegFeature & 1);
4031	memcpy(s->abATAPICmd, s->abIOBuffer, ATAPI_PACKET_SIZE);
4032	s->uTxDir = PDMMEDIATXDIR_NONE;
4033	s->cbTotalTransfer = 0;
4034	s->cbElementaryTransfer = 0;
4035	s->cbAtapiPassthroughTransfer = 0;
4036	atapiR3ParseCmd(pDevIns, pCtl, s, pDevR3);
4037	return false;
4038	}
4039
4040
4041	/**
4042	* SCSI_GET_EVENT_STATUS_NOTIFICATION should return "medium removed" event
4043	* from now on, regardless if there was a medium inserted or not.
4044	*/
4045	static void ataR3MediumRemoved(PATADEVSTATE s)
4046	{
4047	ASMAtomicWriteU32(&s->MediaEventStatus, ATA_EVENT_STATUS_MEDIA_REMOVED);
4048	}
4049
4050
4051	/**
4052	* SCSI_GET_EVENT_STATUS_NOTIFICATION should return "medium inserted". If
4053	* there was already a medium inserted, don't forget to send the "medium
4054	* removed" event first.
4055	*/
4056	static void ataR3MediumInserted(PATADEVSTATE s)
4057	{
4058	uint32_t OldStatus, NewStatus;
4059	do
4060	{
4061	OldStatus = ASMAtomicReadU32(&s->MediaEventStatus);
4062	switch (OldStatus)
4063	{
4064	case ATA_EVENT_STATUS_MEDIA_CHANGED:
4065	case ATA_EVENT_STATUS_MEDIA_REMOVED:
4066	/* no change, we will send "medium removed" + "medium inserted" */
4067	NewStatus = ATA_EVENT_STATUS_MEDIA_CHANGED;
4068	break;
4069	default:
4070	NewStatus = ATA_EVENT_STATUS_MEDIA_NEW;
4071	break;
4072	}
4073	} while (!ASMAtomicCmpXchgU32(&s->MediaEventStatus, NewStatus, OldStatus));
4074	}
4075
4076
4077	/**
4078	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnMountNotify}
4079	*/
4080	static DECLCALLBACK(void) ataR3MountNotify(PPDMIMOUNTNOTIFY pInterface)
4081	{
4082	PATADEVSTATER3 pIfR3 = RT_FROM_MEMBER(pInterface, ATADEVSTATER3, IMountNotify);
4083	PATASTATE pThis = PDMDEVINS_2_DATA(pIfR3->pDevIns, PATASTATE);
4084	PATADEVSTATE pIf = &RT_SAFE_SUBSCRIPT(RT_SAFE_SUBSCRIPT(pThis->aCts, pIfR3->iCtl).aIfs, pIfR3->iDev);
4085	Log(("%s: changing LUN#%d\n", __FUNCTION__, pIfR3->iLUN));
4086
4087	/* Ignore the call if we're called while being attached. */
4088	if (!pIfR3->pDrvMedia)
4089	return;
4090
4091	uint32_t cRegions = pIfR3->pDrvMedia->pfnGetRegionCount(pIfR3->pDrvMedia);
4092	for (uint32_t i = 0; i < cRegions; i++)
4093	{
4094	uint64_t cBlocks = 0;
4095	int rc = pIfR3->pDrvMedia->pfnQueryRegionProperties(pIfR3->pDrvMedia, i, NULL, &cBlocks, NULL, NULL);
4096	AssertRC(rc);
4097	pIf->cTotalSectors += cBlocks;
4098	}
4099
4100	LogRel(("PIIX3 ATA: LUN#%d: CD/DVD, total number of sectors %Ld, passthrough unchanged\n", pIf->iLUN, pIf->cTotalSectors));
4101
4102	/* Report media changed in TEST UNIT and other (probably incorrect) places. */
4103	if (pIf->cNotifiedMediaChange < 2)
4104	pIf->cNotifiedMediaChange = 1;
4105	ataR3MediumInserted(pIf);
4106	ataR3MediumTypeSet(pIf, ATA_MEDIA_TYPE_UNKNOWN);
4107	}
4108
4109	/**
4110	* @interface_method_impl{PDMIMOUNTNOTIFY,pfnUnmountNotify}
4111	*/
4112	static DECLCALLBACK(void) ataR3UnmountNotify(PPDMIMOUNTNOTIFY pInterface)
4113	{
4114	PATADEVSTATER3 pIfR3 = RT_FROM_MEMBER(pInterface, ATADEVSTATER3, IMountNotify);
4115	PATASTATE pThis = PDMDEVINS_2_DATA(pIfR3->pDevIns, PATASTATE);
4116	PATADEVSTATE pIf = &RT_SAFE_SUBSCRIPT(RT_SAFE_SUBSCRIPT(pThis->aCts, pIfR3->iCtl).aIfs, pIfR3->iDev);
4117	Log(("%s:\n", __FUNCTION__));
4118	pIf->cTotalSectors = 0;
4119
4120	/*
4121	* Whatever I do, XP will not use the GET MEDIA STATUS nor the EVENT stuff.
4122	* However, it will respond to TEST UNIT with a 0x6 0x28 (media changed) sense code.
4123	* So, we'll give it 4 TEST UNIT command to catch up, two which the media is not
4124	* present and 2 in which it is changed.
4125	*/
4126	pIf->cNotifiedMediaChange = 1;
4127	ataR3MediumRemoved(pIf);
4128	ataR3MediumTypeSet(pIf, ATA_MEDIA_NO_DISC);
4129	}
4130
4131	/**
4132	* Begin Transfer: PACKET
4133	*/
4134	static void ataR3PacketBT(PATACONTROLLER pCtl, PATADEVSTATE s)
4135	{
4136	s->cbElementaryTransfer = s->cbTotalTransfer;
4137	s->cbAtapiPassthroughTransfer = s->cbTotalTransfer;
4138	s->uATARegNSector = (s->uATARegNSector & ~7) \| ATAPI_INT_REASON_CD;
4139	Log2(("%s: interrupt reason %#04x\n", __FUNCTION__, s->uATARegNSector));
4140	ataSetStatusValue(pCtl, s, ATA_STAT_READY);
4141	}
4142
4143
4144	static void ataR3ResetDevice(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s)
4145	{
4146	LogFlowFunc(("\n"));
4147	s->cMultSectors = ATA_MAX_MULT_SECTORS;
4148	s->cNotifiedMediaChange = 0;
4149	ASMAtomicWriteU32(&s->MediaEventStatus, ATA_EVENT_STATUS_UNCHANGED);
4150	ASMAtomicWriteU32(&s->MediaTrackType, ATA_MEDIA_TYPE_UNKNOWN);
4151	ataUnsetIRQ(pDevIns, pCtl, s);
4152
4153	s->uATARegSelect = 0x20;
4154	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| ATA_STAT_SEEK);
4155	ataR3SetSignature(s);
4156	s->cbTotalTransfer = 0;
4157	s->cbElementaryTransfer = 0;
4158	s->cbAtapiPassthroughTransfer = 0;
4159	s->iIOBufferPIODataStart = 0;
4160	s->iIOBufferPIODataEnd = 0;
4161	s->iBeginTransfer = ATAFN_BT_NULL;
4162	s->iSourceSink = ATAFN_SS_NULL;
4163	s->fDMA = false;
4164	s->fATAPITransfer = false;
4165	s->uATATransferMode = ATA_MODE_UDMA \| 2; /* PIIX3 supports only up to UDMA2 */
4166
4167	s->XCHSGeometry = s->PCHSGeometry; /* Restore default CHS translation. */
4168
4169	s->uATARegFeature = 0;
4170	}
4171
4172
4173	static void ataR3DeviceDiag(PATACONTROLLER pCtl, PATADEVSTATE s)
4174	{
4175	ataR3SetSignature(s);
4176	if (s->fATAPI)
4177	ataSetStatusValue(pCtl, s, 0); /* NOTE: READY is _not_ set */
4178	else
4179	ataSetStatusValue(pCtl, s, ATA_STAT_READY \| ATA_STAT_SEEK);
4180	s->uATARegError = 0x01;
4181	}
4182
4183
4184	/**
4185	* Sink/Source: EXECUTE DEVICE DIAGNOTIC
4186	*/
4187	static bool ataR3ExecuteDeviceDiagnosticSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4188	{
4189	RT_NOREF(pDevIns, s, pDevR3);
4190
4191	/* EXECUTE DEVICE DIAGNOSTIC is a very special command which always
4192	* gets executed, regardless of which device is selected. As a side
4193	* effect, it always completes with device 0 selected.
4194	*/
4195	for (uint32_t i = 0; i < RT_ELEMENTS(pCtl->aIfs); i++)
4196	ataR3DeviceDiag(pCtl, &pCtl->aIfs[i]);
4197
4198	LogRel(("ATA: LUN#%d: EXECUTE DEVICE DIAGNOSTIC, status %02X\n", s->iLUN, s->uATARegStatus));
4199	pCtl->iSelectedIf = 0;
4200
4201	return false;
4202	}
4203
4204
4205	/**
4206	* Sink/Source: INITIALIZE DEVICE PARAMETERS
4207	*/
4208	static bool ataR3InitDevParmSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4209	{
4210	RT_NOREF(pDevR3);
4211	LogFlowFunc(("\n"));
4212
4213	/* Technical Note:
4214	* On ST506 type drives with a separate controller, the INITIALIZE DRIVE PARAMETERS command was
4215	* required to inform the controller of drive geometry. The controller needed to know the
4216	* number of heads and sectors per track so that it could correctly advance to the next track
4217	* or cylinder when executing multi-sector commands. Setting a geometry that didn't match the
4218	* drive made very little sense because sectors had fixed CHS addresses. It was at best
4219	* possible to reduce the drive's capacity by limiting the number of heads and/or sectors
4220	* per track.
4221	*
4222	* IDE drives inherently have to know their true geometry, but most of them also support
4223	* programmable translation that can be set through the INITIALIZE DEVICE PARAMETERS command.
4224	* In fact most older IDE drives typically weren't operated using their default (native) geometry,
4225	* and with newer IDE drives that's not even an option.
4226	*
4227	* Up to and including ATA-5, the standard defined a CHS to LBA translation (since ATA-6, CHS
4228	* support is optional):
4229	*
4230	* LBA = (((cyl_num * heads_per_cyl) + head_num) * sectors_per_track) + sector_num - 1
4231	*
4232	* The INITIALIZE DEVICE PARAMETERS command sets the heads_per_cyl and sectors_per_track
4233	* values used in the above formula.
4234	*
4235	* Drives must obviously support an INITIALIZE DRIVE PARAMETERS command matching the drive's
4236	* default CHS translation. Everything else is optional.
4237	*
4238	* We support any geometry with non-zero sectors per track because there's no reason not to;
4239	* this behavior is common in many if not most IDE drives.
4240	*/
4241
4242	PDMMEDIAGEOMETRY Geom = { 0 };
4243
4244	Geom.cHeads = (s->uATARegSelect & 0x0f) + 1; /* Effective range 1-16. */
4245	Geom.cSectors = s->uATARegNSector; /* Range 0-255, zero is not valid. */
4246
4247	if (Geom.cSectors)
4248	{
4249	uint64_t cCylinders = s->cTotalSectors / (Geom.cHeads * Geom.cSectors);
4250	Geom.cCylinders = RT_MAX(RT_MIN(cCylinders, 16383), 1);
4251
4252	s->XCHSGeometry = Geom;
4253
4254	ataR3LockLeave(pDevIns, pCtl);
4255	LogRel(("ATA: LUN#%d: INITIALIZE DEVICE PARAMETERS: %u sectors per track, %u heads\n",
4256	s->iLUN, s->uATARegNSector, (s->uATARegSelect & 0x0f) + 1));
4257	RTThreadSleep(pCtl->msDelayIRQ);
4258	ataR3LockEnter(pDevIns, pCtl);
4259	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4260	}
4261	else
4262	{
4263	ataR3LockLeave(pDevIns, pCtl);
4264	LogRel(("ATA: LUN#%d: INITIALIZE DEVICE PARAMETERS error (zero sectors per track)!\n", s->iLUN));
4265	RTThreadSleep(pCtl->msDelayIRQ);
4266	ataR3LockEnter(pDevIns, pCtl);
4267	ataR3CmdError(pCtl, s, ABRT_ERR);
4268	}
4269	return false;
4270	}
4271
4272
4273	/**
4274	* Sink/Source: RECALIBRATE
4275	*/
4276	static bool ataR3RecalibrateSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4277	{
4278	RT_NOREF(pDevR3);
4279	LogFlowFunc(("\n"));
4280	ataR3LockLeave(pDevIns, pCtl);
4281	RTThreadSleep(pCtl->msDelayIRQ);
4282	ataR3LockEnter(pDevIns, pCtl);
4283	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4284	return false;
4285	}
4286
4287
4288	static int ataR3TrimSectors(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3,
4289	uint64_t u64Sector, uint32_t cSectors, bool *pfRedo)
4290	{
4291	RTRANGE TrimRange;
4292	int rc;
4293
4294	ataR3LockLeave(pDevIns, pCtl);
4295
4296	TrimRange.offStart = u64Sector * s->cbSector;
4297	TrimRange.cbRange = cSectors * s->cbSector;
4298
4299	s->Led.Asserted.s.fWriting = s->Led.Actual.s.fWriting = 1;
4300	rc = pDevR3->pDrvMedia->pfnDiscard(pDevR3->pDrvMedia, &TrimRange, 1);
4301	s->Led.Actual.s.fWriting = 0;
4302
4303	if (RT_SUCCESS(rc))
4304	*pfRedo = false;
4305	else
4306	*pfRedo = ataR3IsRedoSetWarning(pDevIns, pCtl, rc);
4307
4308	ataR3LockEnter(pDevIns, pCtl);
4309	return rc;
4310	}
4311
4312
4313	/**
4314	* Sink/Source: TRIM
4315	*/
4316	static bool ataR3TrimSS(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3)
4317	{
4318	int rc = VERR_GENERAL_FAILURE;
4319	uint32_t cRangesMax;
4320	uint64_t pu64Range = (uint64_t )&s->abIOBuffer[0];
4321	bool fRedo = false;
4322
4323	cRangesMax = RT_MIN(s->cbElementaryTransfer, sizeof(s->abIOBuffer)) / sizeof(uint64_t);
4324	Assert(cRangesMax);
4325
4326	while (cRangesMax-- > 0)
4327	{
4328	if (ATA_RANGE_LENGTH_GET(*pu64Range) == 0)
4329	break;
4330
4331	rc = ataR3TrimSectors(pDevIns, pCtl, s, pDevR3, *pu64Range & ATA_RANGE_LBA_MASK,
4332	ATA_RANGE_LENGTH_GET(*pu64Range), &fRedo);
4333	if (RT_FAILURE(rc))
4334	break;
4335
4336	pu64Range++;
4337	}
4338
4339	if (RT_SUCCESS(rc))
4340	{
4341	s->iSourceSink = ATAFN_SS_NULL;
4342	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4343	}
4344	else
4345	{
4346	if (fRedo)
4347	return fRedo;
4348	if (s->cErrors++ < MAX_LOG_REL_ERRORS)
4349	LogRel(("PIIX3 ATA: LUN#%d: disk trim error (rc=%Rrc iSector=%#RX64 cSectors=%#RX32)\n",
4350	s->iLUN, rc, pu64Range & ATA_RANGE_LBA_MASK, ATA_RANGE_LENGTH_GET(pu64Range)));
4351
4352	/*
4353	* Check if we got interrupted. We don't need to set status variables
4354	* because the request was aborted.
4355	*/
4356	if (rc != VERR_INTERRUPTED)
4357	ataR3CmdError(pCtl, s, ID_ERR);
4358	}
4359
4360	return false;
4361	}
4362
4363
4364	static void ataR3ParseCmd(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, PATADEVSTATE s, PATADEVSTATER3 pDevR3, uint8_t cmd)
4365	{
4366	# ifdef DEBUG
4367	Log(("%s: LUN#%d CMD=%#04x \"%s\"\n", __FUNCTION__, s->iLUN, cmd, ATACmdText(cmd)));
4368	# else /* !DEBUG */
4369	Log(("%s: LUN#%d CMD=%#04x\n", __FUNCTION__, s->iLUN, cmd));
4370	# endif /* !DEBUG */
4371	s->fLBA48 = false;
4372	s->fDMA = false;
4373	if (cmd == ATA_IDLE_IMMEDIATE)
4374	{
4375	/* Detect Linux timeout recovery, first tries IDLE IMMEDIATE (which
4376	* would overwrite the failing command unfortunately), then RESET. */
4377	int32_t uCmdWait = -1;
4378	uint64_t uNow = RTTimeNanoTS();
4379	if (s->u64CmdTS)
4380	uCmdWait = (uNow - s->u64CmdTS) / 1000;
4381	LogRel(("PIIX3 ATA: LUN#%d: IDLE IMMEDIATE, CmdIf=%#04x (%d usec ago)\n",
4382	s->iLUN, s->uATARegCommand, uCmdWait));
4383	}
4384	s->uATARegCommand = cmd;
4385	switch (cmd)
4386	{
4387	case ATA_IDENTIFY_DEVICE:
4388	if (pDevR3->pDrvMedia && !s->fATAPI)
4389	ataR3StartTransfer(pDevIns, pCtl, s, 512, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_NULL, ATAFN_SS_IDENTIFY, false);
4390	else
4391	{
4392	if (s->fATAPI)
4393	ataR3SetSignature(s);
4394	ataR3CmdError(pCtl, s, ABRT_ERR);
4395	ataUnsetStatus(pCtl, s, ATA_STAT_READY);
4396	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4397	}
4398	break;
4399	case ATA_RECALIBRATE:
4400	if (s->fATAPI)
4401	goto abort_cmd;
4402	ataR3StartTransfer(pDevIns, pCtl, s, 0, PDMMEDIATXDIR_NONE, ATAFN_BT_NULL, ATAFN_SS_RECALIBRATE, false);
4403	break;
4404	case ATA_INITIALIZE_DEVICE_PARAMETERS:
4405	if (s->fATAPI)
4406	goto abort_cmd;
4407	ataR3StartTransfer(pDevIns, pCtl, s, 0, PDMMEDIATXDIR_NONE, ATAFN_BT_NULL, ATAFN_SS_INITIALIZE_DEVICE_PARAMETERS, false);
4408	break;
4409	case ATA_SET_MULTIPLE_MODE:
4410	if ( s->uATARegNSector != 0
4411	&& ( s->uATARegNSector > ATA_MAX_MULT_SECTORS
4412	\|\| (s->uATARegNSector & (s->uATARegNSector - 1)) != 0))
4413	{
4414	ataR3CmdError(pCtl, s, ABRT_ERR);
4415	}
4416	else
4417	{
4418	Log2(("%s: set multi sector count to %d\n", __FUNCTION__, s->uATARegNSector));
4419	s->cMultSectors = s->uATARegNSector;
4420	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4421	}
4422	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4423	break;
4424	case ATA_READ_VERIFY_SECTORS_EXT:
4425	s->fLBA48 = true;
4426	RT_FALL_THRU();
4427	case ATA_READ_VERIFY_SECTORS:
4428	case ATA_READ_VERIFY_SECTORS_WITHOUT_RETRIES:
4429	/* do sector number check ? */
4430	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4431	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4432	break;
4433	case ATA_READ_SECTORS_EXT:
4434	s->fLBA48 = true;
4435	RT_FALL_THRU();
4436	case ATA_READ_SECTORS:
4437	case ATA_READ_SECTORS_WITHOUT_RETRIES:
4438	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4439	goto abort_cmd;
4440	s->cSectorsPerIRQ = 1;
4441	s->iCurLBA = ataR3GetSector(s);
4442	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_READ_SECTORS, false);
4443	break;
4444	case ATA_WRITE_SECTORS_EXT:
4445	s->fLBA48 = true;
4446	RT_FALL_THRU();
4447	case ATA_WRITE_SECTORS:
4448	case ATA_WRITE_SECTORS_WITHOUT_RETRIES:
4449	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4450	goto abort_cmd;
4451	s->cSectorsPerIRQ = 1;
4452	s->iCurLBA = ataR3GetSector(s);
4453	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_TO_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_WRITE_SECTORS, false);
4454	break;
4455	case ATA_READ_MULTIPLE_EXT:
4456	s->fLBA48 = true;
4457	RT_FALL_THRU();
4458	case ATA_READ_MULTIPLE:
4459	if (!pDevR3->pDrvMedia \|\| !s->cMultSectors \|\| s->fATAPI)
4460	goto abort_cmd;
4461	s->cSectorsPerIRQ = s->cMultSectors;
4462	s->iCurLBA = ataR3GetSector(s);
4463	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_READ_SECTORS, false);
4464	break;
4465	case ATA_WRITE_MULTIPLE_EXT:
4466	s->fLBA48 = true;
4467	RT_FALL_THRU();
4468	case ATA_WRITE_MULTIPLE:
4469	if (!pDevR3->pDrvMedia \|\| !s->cMultSectors \|\| s->fATAPI)
4470	goto abort_cmd;
4471	s->cSectorsPerIRQ = s->cMultSectors;
4472	s->iCurLBA = ataR3GetSector(s);
4473	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_TO_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_WRITE_SECTORS, false);
4474	break;
4475	case ATA_READ_DMA_EXT:
4476	s->fLBA48 = true;
4477	RT_FALL_THRU();
4478	case ATA_READ_DMA:
4479	case ATA_READ_DMA_WITHOUT_RETRIES:
4480	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4481	goto abort_cmd;
4482	s->cSectorsPerIRQ = ATA_MAX_MULT_SECTORS;
4483	s->iCurLBA = ataR3GetSector(s);
4484	s->fDMA = true;
4485	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_READ_SECTORS, false);
4486	break;
4487	case ATA_WRITE_DMA_EXT:
4488	s->fLBA48 = true;
4489	RT_FALL_THRU();
4490	case ATA_WRITE_DMA:
4491	case ATA_WRITE_DMA_WITHOUT_RETRIES:
4492	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4493	goto abort_cmd;
4494	s->cSectorsPerIRQ = ATA_MAX_MULT_SECTORS;
4495	s->iCurLBA = ataR3GetSector(s);
4496	s->fDMA = true;
4497	ataR3StartTransfer(pDevIns, pCtl, s, ataR3GetNSectors(s) * s->cbSector, PDMMEDIATXDIR_TO_DEVICE, ATAFN_BT_READ_WRITE_SECTORS, ATAFN_SS_WRITE_SECTORS, false);
4498	break;
4499	case ATA_READ_NATIVE_MAX_ADDRESS_EXT:
4500	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4501	goto abort_cmd;
4502	s->fLBA48 = true;
4503	ataR3SetSector(s, s->cTotalSectors - 1);
4504	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4505	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4506	break;
4507	case ATA_SEEK: /* Used by the SCO OpenServer. Command is marked as obsolete */
4508	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4509	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4510	break;
4511	case ATA_READ_NATIVE_MAX_ADDRESS:
4512	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4513	goto abort_cmd;
4514	ataR3SetSector(s, RT_MIN(s->cTotalSectors, 1 << 28) - 1);
4515	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4516	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4517	break;
4518	case ATA_CHECK_POWER_MODE:
4519	s->uATARegNSector = 0xff; /* drive active or idle */
4520	ataR3CmdOK(pCtl, s, 0);
4521	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4522	break;
4523	case ATA_SET_FEATURES:
4524	Log2(("%s: feature=%#x\n", __FUNCTION__, s->uATARegFeature));
4525	if (!pDevR3->pDrvMedia)
4526	goto abort_cmd;
4527	switch (s->uATARegFeature)
4528	{
4529	case 0x02: /* write cache enable */
4530	Log2(("%s: write cache enable\n", __FUNCTION__));
4531	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4532	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4533	break;
4534	case 0xaa: /* read look-ahead enable */
4535	Log2(("%s: read look-ahead enable\n", __FUNCTION__));
4536	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4537	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4538	break;
4539	case 0x55: /* read look-ahead disable */
4540	Log2(("%s: read look-ahead disable\n", __FUNCTION__));
4541	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4542	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4543	break;
4544	case 0xcc: /* reverting to power-on defaults enable */
4545	Log2(("%s: revert to power-on defaults enable\n", __FUNCTION__));
4546	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4547	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4548	break;
4549	case 0x66: /* reverting to power-on defaults disable */
4550	Log2(("%s: revert to power-on defaults disable\n", __FUNCTION__));
4551	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4552	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4553	break;
4554	case 0x82: /* write cache disable */
4555	Log2(("%s: write cache disable\n", __FUNCTION__));
4556	/* As per the ATA/ATAPI-6 specs, a write cache disable
4557	* command MUST flush the write buffers to disc. */
4558	ataR3StartTransfer(pDevIns, pCtl, s, 0, PDMMEDIATXDIR_NONE, ATAFN_BT_NULL, ATAFN_SS_FLUSH, false);
4559	break;
4560	case 0x03: { /* set transfer mode */
4561	Log2(("%s: transfer mode %#04x\n", __FUNCTION__, s->uATARegNSector));
4562	switch (s->uATARegNSector & 0xf8)
4563	{
4564	case 0x00: /* PIO default */
4565	case 0x08: /* PIO mode */
4566	break;
4567	case ATA_MODE_MDMA: /* MDMA mode */
4568	s->uATATransferMode = (s->uATARegNSector & 0xf8) \| RT_MIN(s->uATARegNSector & 0x07, ATA_MDMA_MODE_MAX);
4569	break;
4570	case ATA_MODE_UDMA: /* UDMA mode */
4571	s->uATATransferMode = (s->uATARegNSector & 0xf8) \| RT_MIN(s->uATARegNSector & 0x07, ATA_UDMA_MODE_MAX);
4572	break;
4573	default:
4574	goto abort_cmd;
4575	}
4576	ataR3CmdOK(pCtl, s, ATA_STAT_SEEK);
4577	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4578	break;
4579	}
4580	default:
4581	goto abort_cmd;
4582	}
4583	/*
4584	* OS/2 workarond:
4585	* The OS/2 IDE driver from MCP2 appears to rely on the feature register being
4586	* reset here. According to the specification, this is a driver bug as the register
4587	* contents are undefined after the call. This means we can just as well reset it.
4588	*/
4589	s->uATARegFeature = 0;
4590	break;
4591	case ATA_FLUSH_CACHE_EXT:
4592	case ATA_FLUSH_CACHE:
4593	if (!pDevR3->pDrvMedia \|\| s->fATAPI)
4594	goto abort_cmd;
4595	ataR3StartTransfer(pDevIns, pCtl, s, 0, PDMMEDIATXDIR_NONE, ATAFN_BT_NULL, ATAFN_SS_FLUSH, false);
4596	break;
4597	case ATA_STANDBY_IMMEDIATE:
4598	ataR3CmdOK(pCtl, s, 0);
4599	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4600	break;
4601	case ATA_IDLE_IMMEDIATE:
4602	LogRel(("PIIX3 ATA: LUN#%d: aborting current command\n", s->iLUN));
4603	ataR3AbortCurrentCommand(pDevIns, pCtl, s, false);
4604	break;
4605	case ATA_SLEEP:
4606	ataR3CmdOK(pCtl, s, 0);
4607	ataHCSetIRQ(pDevIns, pCtl, s);
4608	break;
4609	/* ATAPI commands */
4610	case ATA_IDENTIFY_PACKET_DEVICE:
4611	if (s->fATAPI)
4612	ataR3StartTransfer(pDevIns, pCtl, s, 512, PDMMEDIATXDIR_FROM_DEVICE, ATAFN_BT_NULL, ATAFN_SS_ATAPI_IDENTIFY, false);
4613	else
4614	{
4615	ataR3CmdError(pCtl, s, ABRT_ERR);
4616	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4617	}
4618	break;
4619	case ATA_EXECUTE_DEVICE_DIAGNOSTIC:
4620	ataR3StartTransfer(pDevIns, pCtl, s, 0, PDMMEDIATXDIR_NONE, ATAFN_BT_NULL, ATAFN_SS_EXECUTE_DEVICE_DIAGNOSTIC, false);
4621	break;
4622	case ATA_DEVICE_RESET:
4623	if (!s->fATAPI)
4624	goto abort_cmd;
4625	LogRel(("PIIX3 ATA: LUN#%d: performing device RESET\n", s->iLUN));
4626	ataR3AbortCurrentCommand(pDevIns, pCtl, s, true);
4627	break;
4628	case ATA_PACKET:
4629	if (!s->fATAPI)
4630	goto abort_cmd;
4631	/* overlapping commands not supported */
4632	if (s->uATARegFeature & 0x02)
4633	goto abort_cmd;
4634	ataR3StartTransfer(pDevIns, pCtl, s, ATAPI_PACKET_SIZE, PDMMEDIATXDIR_TO_DEVICE, ATAFN_BT_PACKET, ATAFN_SS_PACKET, false);
4635	break;
4636	case ATA_DATA_SET_MANAGEMENT:
4637	if (!pDevR3->pDrvMedia \|\| !pDevR3->pDrvMedia->pfnDiscard)
4638	goto abort_cmd;
4639	if ( !(s->uATARegFeature & UINT8_C(0x01))
4640	\|\| (s->uATARegFeature & ~UINT8_C(0x01)))
4641	goto abort_cmd;
4642	s->fDMA = true;
4643	ataR3StartTransfer(pDevIns, pCtl, s, (s->uATARegNSectorHOB << 8 \| s->uATARegNSector) * s->cbSector, PDMMEDIATXDIR_TO_DEVICE, ATAFN_BT_NULL, ATAFN_SS_TRIM, false);
4644	break;
4645	default:
4646	abort_cmd:
4647	ataR3CmdError(pCtl, s, ABRT_ERR);
4648	if (s->fATAPI)
4649	ataUnsetStatus(pCtl, s, ATA_STAT_READY);
4650	ataHCSetIRQ(pDevIns, pCtl, s); /* Shortcut, do not use AIO thread. */
4651	break;
4652	}
4653	}
4654
4655	# endif /* IN_RING3 */
4656	#endif /* IN_RING0 \|\| IN_RING3 */
4657
4658	/*
4659	* Note: There are four distinct cases of port I/O handling depending on
4660	* which devices (if any) are attached to an IDE channel:
4661	*
4662	* 1) No device attached. No response to writes or reads (i.e. reads return
4663	* all bits set).
4664	*
4665	* 2) Both devices attached. Reads and writes are processed normally.
4666	*
4667	* 3) Device 0 only. If device 0 is selected, normal behavior applies. But
4668	* if Device 1 is selected, writes are still directed to Device 0 (except
4669	* commands are not executed), reads from control/command registers are
4670	* directed to Device 0, but status/alt status reads return 0. If Device 1
4671	* is a PACKET device, all reads return 0. See ATAPI-6 clause 9.16.1 and
4672	* Table 18 in clause 7.1.
4673	*
4674	* 4) Device 1 only - non-standard(!). Device 1 can't tell if Device 0 is
4675	* present or not and behaves the same. That means if Device 0 is selected,
4676	* Device 1 responds to writes (except commands are not executed) but does
4677	* not respond to reads. If Device 1 selected, normal behavior applies.
4678	* See ATAPI-6 clause 9.16.2 and Table 15 in clause 7.1.
4679	*/
4680
4681	static VBOXSTRICTRC ataIOPortWriteU8(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, uint32_t addr, uint32_t val, uintptr_t iCtl)
4682	{
4683	RT_NOREF(iCtl);
4684	Log2(("%s: LUN#%d write addr=%#x val=%#04x\n", __FUNCTION__, pCtl->aIfs[pCtl->iSelectedIf & ATA_SELECTED_IF_MASK].iLUN, addr, val));
4685	addr &= 7;
4686	switch (addr)
4687	{
4688	case 0:
4689	break;
4690	case 1: /* feature register */
4691	/* NOTE: data is written to the two drives */
4692	pCtl->aIfs[0].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4693	pCtl->aIfs[1].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4694	pCtl->aIfs[0].uATARegFeatureHOB = pCtl->aIfs[0].uATARegFeature;
4695	pCtl->aIfs[1].uATARegFeatureHOB = pCtl->aIfs[1].uATARegFeature;
4696	pCtl->aIfs[0].uATARegFeature = val;
4697	pCtl->aIfs[1].uATARegFeature = val;
4698	break;
4699	case 2: /* sector count */
4700	pCtl->aIfs[0].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4701	pCtl->aIfs[1].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4702	pCtl->aIfs[0].uATARegNSectorHOB = pCtl->aIfs[0].uATARegNSector;
4703	pCtl->aIfs[1].uATARegNSectorHOB = pCtl->aIfs[1].uATARegNSector;
4704	pCtl->aIfs[0].uATARegNSector = val;
4705	pCtl->aIfs[1].uATARegNSector = val;
4706	break;
4707	case 3: /* sector number */
4708	pCtl->aIfs[0].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4709	pCtl->aIfs[1].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4710	pCtl->aIfs[0].uATARegSectorHOB = pCtl->aIfs[0].uATARegSector;
4711	pCtl->aIfs[1].uATARegSectorHOB = pCtl->aIfs[1].uATARegSector;
4712	pCtl->aIfs[0].uATARegSector = val;
4713	pCtl->aIfs[1].uATARegSector = val;
4714	break;
4715	case 4: /* cylinder low */
4716	pCtl->aIfs[0].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4717	pCtl->aIfs[1].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4718	pCtl->aIfs[0].uATARegLCylHOB = pCtl->aIfs[0].uATARegLCyl;
4719	pCtl->aIfs[1].uATARegLCylHOB = pCtl->aIfs[1].uATARegLCyl;
4720	pCtl->aIfs[0].uATARegLCyl = val;
4721	pCtl->aIfs[1].uATARegLCyl = val;
4722	break;
4723	case 5: /* cylinder high */
4724	pCtl->aIfs[0].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4725	pCtl->aIfs[1].uATARegDevCtl &= ~ATA_DEVCTL_HOB;
4726	pCtl->aIfs[0].uATARegHCylHOB = pCtl->aIfs[0].uATARegHCyl;
4727	pCtl->aIfs[1].uATARegHCylHOB = pCtl->aIfs[1].uATARegHCyl;
4728	pCtl->aIfs[0].uATARegHCyl = val;
4729	pCtl->aIfs[1].uATARegHCyl = val;
4730	break;
4731	case 6: /* drive/head */
4732	pCtl->aIfs[0].uATARegSelect = val & ~0x10;
4733	pCtl->aIfs[1].uATARegSelect = val \| 0x10;
4734	if (((val >> 4) & ATA_SELECTED_IF_MASK) != pCtl->iSelectedIf)
4735	{
4736	/* select another drive */
4737	uintptr_t const iSelectedIf = (val >> 4) & ATA_SELECTED_IF_MASK;
4738	pCtl->iSelectedIf = (uint8_t)iSelectedIf;
4739	/* The IRQ line is multiplexed between the two drives, so
4740	* update the state when switching to another drive. Only need
4741	* to update interrupt line if it is enabled and there is a
4742	* state change. */
4743	if ( !(pCtl->aIfs[iSelectedIf].uATARegDevCtl & ATA_DEVCTL_DISABLE_IRQ)
4744	&& pCtl->aIfs[iSelectedIf].fIrqPending != pCtl->aIfs[iSelectedIf ^ 1].fIrqPending)
4745	{
4746	if (pCtl->aIfs[iSelectedIf].fIrqPending)
4747	{
4748	Log2(("%s: LUN#%d asserting IRQ (drive select change)\n", __FUNCTION__, pCtl->aIfs[iSelectedIf].iLUN));
4749	/* The BMDMA unit unconditionally sets BM_STATUS_INT if
4750	* the interrupt line is asserted. It monitors the line
4751	* for a rising edge. */
4752	pCtl->BmDma.u8Status \|= BM_STATUS_INT;
4753	if (pCtl->irq == 16)
4754	PDMDevHlpPCISetIrq(pDevIns, 0, 1);
4755	else
4756	PDMDevHlpISASetIrq(pDevIns, pCtl->irq, 1);
4757	}
4758	else
4759	{
4760	Log2(("%s: LUN#%d deasserting IRQ (drive select change)\n", __FUNCTION__, pCtl->aIfs[iSelectedIf].iLUN));
4761	if (pCtl->irq == 16)
4762	PDMDevHlpPCISetIrq(pDevIns, 0, 0);
4763	else
4764	PDMDevHlpISASetIrq(pDevIns, pCtl->irq, 0);
4765	}
4766	}
4767	}
4768	break;
4769	default:
4770	case 7: /* command */
4771	{
4772	/* ignore commands to non-existent device */
4773	uintptr_t iSelectedIf = pCtl->iSelectedIf & ATA_SELECTED_IF_MASK;
4774	PATADEVSTATE pDev = &pCtl->aIfs[iSelectedIf];
4775	if (iSelectedIf && !pDev->fPresent) /** @todo r=bird the iSelectedIf test here looks bogus... explain. */
4776	break;
4777	#ifndef IN_RING3
4778	/* Don't do anything complicated in GC */
4779	return VINF_IOM_R3_IOPORT_WRITE;
4780	#else /* IN_RING3 */
4781	PATASTATER3 pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PATASTATER3);
4782	ataUnsetIRQ(pDevIns, pCtl, &pCtl->aIfs[iSelectedIf]);
4783	ataR3ParseCmd(pDevIns, pCtl, &pCtl->aIfs[iSelectedIf], &pThisCC->aCts[iCtl].aIfs[iSelectedIf], val);
4784	break;
4785	#endif /* !IN_RING3 */
4786	}
4787	}
4788	return VINF_SUCCESS;
4789	}
4790
4791
4792	static VBOXSTRICTRC ataIOPortReadU8(PPDMDEVINS pDevIns, PATACONTROLLER pCtl, uint32_t addr, uint32_t *pu32)
4793	{
4794	PATADEVSTATE s = &pCtl->aIfs[pCtl->iSelectedIf & ATA_SELECTED_IF_MASK];
4795	uint32_t val;
4796	bool fHOB;
4797
4798	/* Check if the guest is reading from a non-existent device. */
4799	if (RT_LIKELY(s->fPresent))
4800	{ /* likely */ }
4801	else
4802	{
4803	if (pCtl->iSelectedIf) /* Device 1 selected, Device 0 responding for it. */
4804	{
4805	Assert(pCtl->aIfs[0].fPresent);
4806
4807	/* When an ATAPI device 0 responds for non-present device 1, it generally
4808	* returns zeros on reads. The Error register is an exception. See clause 7.1,
4809	* table 16 in ATA-6 specification.
4810	*/
4811	if (((addr & 7) != 1) && pCtl->aIfs[0].fATAPI)
4812	{
4813	Log2(("%s: addr=%#x, val=0: LUN#%d not attached/LUN#%d ATAPI\n", __FUNCTION__, addr, s->iLUN, pCtl->aIfs[0].iLUN));
4814	*pu32 = 0;
4815	return VINF_SUCCESS;
4816	}
4817	/* Else handle normally. */
4818	}
4819	else /* Device 0 selected (but not present). */
4820	{
4821	/* Because device 1 has no way to tell if there is device 0, the behavior is the same
4822	* as for an empty bus; see comments in ataIOPortReadEmptyBus(). Note that EFI (TianoCore)
4823	* relies on this behavior when detecting devices.
4824	*/
4825	*pu32 = ATA_EMPTY_BUS_DATA;
4826	Log2(("%s: addr=%#x: LUN#%d not attached, val=%#02x\n", __FUNCTION__, addr, s->iLUN, *pu32));
4827	return VINF_SUCCESS;
4828	}
4829	}
4830
4831	fHOB = !!(s->uATARegDevCtl & (1 << 7));
4832	switch (addr & 7)
4833	{
4834	case 0: /* data register */
4835	val = 0xff;
4836	break;
4837	case 1: /* error register */
4838	/* The ATA specification is very terse when it comes to specifying
4839	* the precise effects of reading back the error/feature register.
4840	* The error register (read-only) shares the register number with
4841	* the feature register (write-only), so it seems that it's not
4842	* necessary to support the usual HOB readback here. */
4843	if (!s->fPresent)
4844	val = 0;
4845	else
4846	val = s->uATARegError;
4847	break;
4848	case 2: /* sector count */
4849	if (fHOB)
4850	val = s->uATARegNSectorHOB;
4851	else
4852	val = s->uATARegNSector;
4853	break;
4854	case 3: /* sector number */
4855	if (fHOB)
4856	val = s->uATARegSectorHOB;
4857	else
4858	val = s->uATARegSector;
4859	break;
4860	case 4: /* cylinder low */
4861	if (fHOB)
4862	val = s->uATARegLCylHOB;
4863	else
4864	val = s->uATARegLCyl;
4865	break;
4866	case 5: /* cylinder high */
4867	if (fHOB)
4868	val = s->uATARegHCylHOB;
4869	else
4870	val = s->uATARegHCyl;
4871	break;
4872	case 6: /* drive/head */
4873	/* This register must always work as long as there is at least
4874	* one drive attached to the controller. It is common between
4875	* both drives anyway (completely identical content). */
4876	if (!pCtl->aIfs[0].fPresent && !pCtl->aIfs[1].fPresent)
4877	val = 0;
4878	else
4879	val = s->uATARegSelect;
4880	break;
4881	default:
4882	case 7: /* primary status */
4883	{
4884	if (!s->fPresent)
4885	val = 0;
4886	else
4887	val = s->uATARegStatus;
4888
4889	/* Give the async I/O thread an opportunity to make progress,
4890	* don't let it starve by guests polling frequently. EMT has a
4891	* lower priority than the async I/O thread, but sometimes the
4892	* host OS doesn't care. With some guests we are only allowed to
4893	* be busy for about 5 milliseconds in some situations. Note that
4894	* this is no guarantee for any other VBox thread getting
4895	* scheduled, so this just lowers the CPU load a bit when drives
4896	* are busy. It cannot help with timing problems. */
4897	if (val & ATA_STAT_BUSY)
4898	{
4899	#ifdef IN_RING3
4900	/* @bugref{1960}: Don't yield all the time, unless it's a reset (can be tricky). */
4901	bool fYield = (s->cBusyStatusHackR3++ & s->cBusyStatusHackR3Rate) == 0
4902	\|\| pCtl->fReset;
4903
4904	ataR3LockLeave(pDevIns, pCtl);
4905
4906	/*
4907	* The thread might be stuck in an I/O operation due to a high I/O
4908	* load on the host (see @bugref{3301}). To perform the reset
4909	* successfully we interrupt the operation by sending a signal to
4910	* the thread if the thread didn't responded in 10ms.
4911	*
4912	* This works only on POSIX hosts (Windows has a CancelSynchronousIo
4913	* function which does the same but it was introduced with Vista) but
4914	* so far this hang was only observed on Linux and Mac OS X.
4915	*
4916	* This is a workaround and needs to be solved properly.
4917	*/
4918	if (pCtl->fReset)
4919	{
4920	uint64_t u64ResetTimeStop = RTTimeMilliTS();
4921	if (u64ResetTimeStop - pCtl->u64ResetTime >= 10)
4922	{
4923	LogRel(("PIIX3 ATA LUN#%d: Async I/O thread probably stuck in operation, interrupting\n", s->iLUN));
4924	pCtl->u64ResetTime = u64ResetTimeStop;
4925	# ifndef RT_OS_WINDOWS /* We've got this API on windows, but it doesn't necessarily interrupt I/O. */
4926	PATASTATER3 pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PATASTATER3);
4927	PATACONTROLLERR3 pCtlR3 = &RT_SAFE_SUBSCRIPT(pThisCC->aCts, pCtl->iCtl);
4928	RTThreadPoke(pCtlR3->hAsyncIOThread);
4929	# endif
4930	Assert(fYield);
4931	}
4932	}
4933
4934	if (fYield)
4935	{
4936	STAM_REL_PROFILE_ADV_START(&s->StatStatusYields, a);
4937	RTThreadYield();
4938	STAM_REL_PROFILE_ADV_STOP(&s->StatStatusYields, a);
4939	}
4940	ASMNopPause();
4941
4942	ataR3LockEnter(pDevIns, pCtl);
4943
4944	val = s->uATARegStatus;
4945	#else /* !IN_RING3 */
4946	/* Cannot yield CPU in raw-mode and ring-0 context. And switching
4947	* to host context for each and every busy status is too costly,
4948	* especially on SMP systems where we don't gain much by
4949	* yielding the CPU to someone else. */
4950	if ((s->cBusyStatusHackRZ++ & s->cBusyStatusHackRZRate) == 1)
4951	{
4952	s->cBusyStatusHackR3 = 0; /* Forces a yield. */
4953	return VINF_IOM_R3_IOPORT_READ;
4954	}
4955	#endif /* !IN_RING3 */
4956	}
4957	else
4958	{
4959	s->cBusyStatusHackRZ = 0;
4960	s->cBusyStatusHackR3 = 0;
4961	}
4962	ataUnsetIRQ(pDevIns, pCtl, s);
4963	break;
4964	}
4965	}
4966	Log2(("%s: LUN#%d addr=%#x val=%#04x\n", __FUNCTION__, s->iLUN, addr, val));
4967	*pu32 = val;
4968	return VINF_SUCCESS;
4969	}
4970
4971
4972	/*
4973	* Read the Alternate status register. Does not affect interrupts.
4974	*/
4975	static uint32_t ataStatusRead(PATACONTROLLER pCtl, uint32_t uIoPortForLog)
4976	{
4977	PATADEVSTATE s = &pCtl->aIfs[pCtl->iSelectedIf & ATA_SELECTED_IF_MASK];
4978	uint32_t val;
4979	RT_NOREF(uIoPortForLog);
4980
4981	Assert(pCtl->aIfs[0].fPresent \|\| pCtl->aIfs[1].fPresent); /* Channel must not be empty. */
4982	if (pCtl->iSelectedIf == 1 && !s->fPresent)
4983	val = 0; /* Device 1 selected, Device 0 responding for it. */
4984	else
4985	val = s->uATARegStatus;
4986	Log2(("%s: LUN#%d read addr=%#x val=%#04x\n", __FUNCTION__,