VirtualBox

source: vbox/trunk/src/VBox/Devices/Storage/DevVirtioSCSI.cpp@ 91703

Last change on this file since 91703 was 91703, checked in by vboxsync, 3 years ago

DevVirtioNet_1_0.cpp: Convert VirtIO to be 'transitional' device, that handles both legacy (0.9) guests and modern (1.0+) guests. Various other small improvements and reduction/improved formatting of logging. See BugRef:8561, Comment #137
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File size: 117.7 KB
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1/* $Id: DevVirtioSCSI.cpp 91703 2021-10-13 02:24:30Z vboxsync $ */
2/** @file
3 * VBox storage devices - Virtio SCSI Driver
4 *
5 * Log-levels used:
6 * - Level 1: The most important (but usually rare) things to note
7 * - Level 2: SCSI command logging
8 * - Level 3: Vector and I/O transfer summary (shows what client sent an expects and fulfillment)
9 * - Level 6: Device <-> Guest Driver negotation, traffic, notifications and state handling
10 * - Level 12: Brief formatted hex dumps of I/O data
11 */
12
13/*
14 * Copyright (C) 2006-2021 Oracle Corporation
15 *
16 * This file is part of VirtualBox Open Source Edition (OSE), as
17 * available from http://www.virtualbox.org. This file is free software;
18 * you can redistribute it and/or modify it under the terms of the GNU
19 * General Public License (GPL) as published by the Free Software
20 * Foundation, in version 2 as it comes in the "COPYING" file of the
21 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
22 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
23 */
24
25
26/*********************************************************************************************************************************
27* Header Files *
28*********************************************************************************************************************************/
29//#define LOG_GROUP LOG_GROUP_DRV_SCSI
30#define LOG_GROUP LOG_GROUP_DEV_VIRTIO
31
32#include <VBox/vmm/pdmdev.h>
33#include <VBox/vmm/pdmstorageifs.h>
34#include <VBox/vmm/pdmcritsect.h>
35#include <VBox/AssertGuest.h>
36#include <VBox/msi.h>
37#include <VBox/version.h>
38#include <VBox/log.h>
39#include <iprt/errcore.h>
40#include <iprt/assert.h>
41#include <iprt/string.h>
42#include <VBox/sup.h>
43#include "../build/VBoxDD.h"
44#include <VBox/scsi.h>
45#ifdef IN_RING3
46# include <iprt/alloc.h>
47# include <iprt/memcache.h>
48# include <iprt/semaphore.h>
49# include <iprt/sg.h>
50# include <iprt/param.h>
51# include <iprt/uuid.h>
52#endif
53#include "../VirtIO/VirtioCore.h"
54
55#include "VBoxSCSI.h"
56#include "VBoxDD.h"
57
58
59/*********************************************************************************************************************************
60* Defined Constants And Macros *
61*********************************************************************************************************************************/
62/** The current saved state version. */
63#define VIRTIOSCSI_SAVED_STATE_VERSION UINT32_C(1)
64
65
66#define LUN0 0
67/** @name VirtIO 1.0 SCSI Host feature bits (See VirtIO 1.0 specification, Section 5.6.3)
68 * @{ */
69#define VIRTIO_SCSI_F_INOUT RT_BIT_64(0) /** Request is device readable AND writeable */
70#define VIRTIO_SCSI_F_HOTPLUG RT_BIT_64(1) /** Host allows hotplugging SCSI LUNs & targets */
71#define VIRTIO_SCSI_F_CHANGE RT_BIT_64(2) /** Host LUNs chgs via VIRTIOSCSI_T_PARAM_CHANGE evt */
72#define VIRTIO_SCSI_F_T10_PI RT_BIT_64(3) /** Add T10 port info (DIF/DIX) in SCSI req hdr */
73/** @} */
74
75
76#define VIRTIOSCSI_HOST_SCSI_FEATURES_ALL \
77 (VIRTIO_SCSI_F_INOUT | VIRTIO_SCSI_F_HOTPLUG | VIRTIO_SCSI_F_CHANGE | VIRTIO_SCSI_F_T10_PI)
78
79#define VIRTIOSCSI_HOST_SCSI_FEATURES_NONE 0
80
81#define VIRTIOSCSI_HOST_SCSI_FEATURES_OFFERED VIRTIOSCSI_HOST_SCSI_FEATURES_NONE
82
83#define VIRTIOSCSI_REQ_VIRTQ_CNT 4 /**< T.B.D. Consider increasing */
84#define VIRTIOSCSI_VIRTQ_CNT (VIRTIOSCSI_REQ_VIRTQ_CNT + 2)
85#define VIRTIOSCSI_MAX_TARGETS 256 /**< T.B.D. Figure out a a good value for this. */
86#define VIRTIOSCSI_MAX_LUN 1 /**< VirtIO specification, section 5.6.4 */
87#define VIRTIOSCSI_MAX_COMMANDS_PER_LUN 128 /**< T.B.D. What is a good value for this? */
88#define VIRTIOSCSI_MAX_SEG_COUNT 126 /**< T.B.D. What is a good value for this? */
89#define VIRTIOSCSI_MAX_SECTORS_HINT 0x10000 /**< VirtIO specification, section 5.6.4 */
90#define VIRTIOSCSI_MAX_CHANNEL_HINT 0 /**< VirtIO specification, section 5.6.4 should be 0 */
91
92#define PCI_DEVICE_ID_VIRTIOSCSI_HOST 0x1048 /**< Informs guest driver of type of VirtIO device */
93#define PCI_CLASS_BASE_MASS_STORAGE 0x01 /**< PCI Mass Storage device class */
94#define PCI_CLASS_SUB_SCSI_STORAGE_CONTROLLER 0x00 /**< PCI SCSI Controller subclass */
95#define PCI_CLASS_PROG_UNSPECIFIED 0x00 /**< Programming interface. N/A. */
96#define VIRTIOSCSI_PCI_CLASS 0x01 /**< Base class Mass Storage? */
97
98#define VIRTIOSCSI_SENSE_SIZE_DEFAULT 96 /**< VirtIO 1.0: 96 on reset, guest can change */
99#define VIRTIOSCSI_SENSE_SIZE_MAX 4096 /**< Picked out of thin air by bird. */
100#define VIRTIOSCSI_CDB_SIZE_DEFAULT 32 /**< VirtIO 1.0: 32 on reset, guest can change */
101#define VIRTIOSCSI_CDB_SIZE_MAX 255 /**< Picked out of thin air by bird. */
102#define VIRTIOSCSI_PI_BYTES_IN 1 /**< Value TBD (see section 5.6.6.1) */
103#define VIRTIOSCSI_PI_BYTES_OUT 1 /**< Value TBD (see section 5.6.6.1) */
104#define VIRTIOSCSI_DATA_OUT 512 /**< Value TBD (see section 5.6.6.1) */
105
106/**
107 * VirtIO SCSI Host Device device-specific queue indicies.
108 * (Note: # of request queues is determined by virtio_scsi_config.num_queues. VirtIO 1.0, 5.6.4)
109 */
110#define CONTROLQ_IDX 0 /**< VirtIO Spec-defined Index of control queue */
111#define EVENTQ_IDX 1 /**< VirtIO Spec-defined Index of event queue */
112#define VIRTQ_REQ_BASE 2 /**< VirtIO Spec-defined base index of req. queues */
113
114#define VIRTQNAME(uVirtqNbr) (pThis->aszVirtqNames[uVirtqNbr]) /**< Macro to get queue name from its index */
115#define CBVIRTQNAME(uVirtqNbr) RTStrNLen(VIRTQNAME(uVirtqNbr), sizeof(VIRTQNAME(uVirtqNbr)))
116
117#define IS_REQ_VIRTQ(uVirtqNbr) (uVirtqNbr >= VIRTQ_REQ_BASE && uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT)
118
119#define VIRTIO_IS_IN_DIRECTION(pMediaExTxDirEnumValue) \
120 ((pMediaExTxDirEnumValue) == PDMMEDIAEXIOREQSCSITXDIR_FROM_DEVICE)
121
122#define VIRTIO_IS_OUT_DIRECTION(pMediaExTxDirEnumValue) \
123 ((pMediaExTxDirEnumValue) == PDMMEDIAEXIOREQSCSITXDIR_TO_DEVICE)
124
125#define IS_VIRTQ_EMPTY(pDevIns, pVirtio, uVirtqNbr) \
126 (virtioCoreVirtqAvailBufCount(pDevIns, pVirtio, uVirtqNbr) == 0)
127
128
129/*********************************************************************************************************************************
130* Structures and Typedefs *
131*********************************************************************************************************************************/
132/**
133 * VirtIO SCSI Host Device device-specific configuration (see VirtIO 1.0, section 5.6.4)
134 * VBox VirtIO core issues callback to this VirtIO device-specific implementation to handle
135 * MMIO accesses to device-specific configuration parameters.
136 */
137typedef struct virtio_scsi_config
138{
139 uint32_t uNumVirtqs; /**< num_queues \# of req q's exposed by dev */
140 uint32_t uSegMax; /**< seg_max Max \# of segs allowed in cmd */
141 uint32_t uMaxSectors; /**< max_sectors Hint to guest max xfer to use */
142 uint32_t uCmdPerLun; /**< cmd_per_lun Max \# of link cmd sent per lun */
143 uint32_t uEventInfoSize; /**< event_info_size Fill max, evtq bufs */
144 uint32_t uSenseSize; /**< sense_size Max sense data size dev writes */
145 uint32_t uCdbSize; /**< cdb_size Max CDB size driver writes */
146 uint16_t uMaxChannel; /**< max_channel Hint to guest driver */
147 uint16_t uMaxTarget; /**< max_target Hint to guest driver */
148 uint32_t uMaxLun; /**< max_lun Hint to guest driver */
149} VIRTIOSCSI_CONFIG_T, PVIRTIOSCSI_CONFIG_T;
150
151/** @name VirtIO 1.0 SCSI Host Device device specific control types
152 * @{ */
153#define VIRTIOSCSI_T_NO_EVENT 0
154#define VIRTIOSCSI_T_TRANSPORT_RESET 1
155#define VIRTIOSCSI_T_ASYNC_NOTIFY 2 /**< Asynchronous notification */
156#define VIRTIOSCSI_T_PARAM_CHANGE 3
157/** @} */
158
159/**
160 * Device operation: eventq
161 */
162#define VIRTIOSCSI_T_EVENTS_MISSED UINT32_C(0x80000000)
163typedef struct virtio_scsi_event
164{
165 // Device-writable part
166 uint32_t uEvent; /**< event */
167 uint8_t abVirtioLun[8]; /**< lun */
168 uint32_t uReason; /**< reason */
169} VIRTIOSCSI_EVENT_T, *PVIRTIOSCSI_EVENT_T;
170
171/** @name VirtIO 1.0 SCSI Host Device device specific event types
172 * @{ */
173#define VIRTIOSCSI_EVT_RESET_HARD 0 /**< */
174#define VIRTIOSCSI_EVT_RESET_RESCAN 1 /**< */
175#define VIRTIOSCSI_EVT_RESET_REMOVED 2 /**< */
176/** @} */
177
178/**
179 * Device operation: reqestq
180 */
181#pragma pack(1)
182typedef struct REQ_CMD_HDR_T
183{
184 uint8_t abVirtioLun[8]; /**< lun */
185 uint64_t uId; /**< id */
186 uint8_t uTaskAttr; /**< task_attr */
187 uint8_t uPrio; /**< prio */
188 uint8_t uCrn; /**< crn */
189} REQ_CMD_HDR_T;
190#pragma pack()
191AssertCompileSize(REQ_CMD_HDR_T, 19);
192
193typedef struct REQ_CMD_PI_T
194{
195 uint32_t uPiBytesOut; /**< pi_bytesout */
196 uint32_t uPiBytesIn; /**< pi_bytesin */
197} REQ_CMD_PI_T;
198AssertCompileSize(REQ_CMD_PI_T, 8);
199
200typedef struct REQ_RESP_HDR_T
201{
202 uint32_t cbSenseLen; /**< sense_len */
203 uint32_t uResidual; /**< residual */
204 uint16_t uStatusQualifier; /**< status_qualifier */
205 uint8_t uStatus; /**< status SCSI status code */
206 uint8_t uResponse; /**< response */
207} REQ_RESP_HDR_T;
208AssertCompileSize(REQ_RESP_HDR_T, 12);
209
210#pragma pack(1)
211typedef struct VIRTIOSCSI_REQ_CMD_T
212{
213 /** Device-readable section
214 * @{ */
215 REQ_CMD_HDR_T ReqHdr;
216 uint8_t uCdb[1]; /**< cdb */
217
218 REQ_CMD_PI_T piHdr; /**< T10 Pi block integrity (optional feature) */
219 uint8_t uPiOut[1]; /**< pi_out[] T10 pi block integrity */
220 uint8_t uDataOut[1]; /**< dataout */
221 /** @} */
222
223 /** @name Device writable section
224 * @{ */
225 REQ_RESP_HDR_T respHdr;
226 uint8_t uSense[1]; /**< sense */
227 uint8_t uPiIn[1]; /**< pi_in[] T10 Pi block integrity */
228 uint8_t uDataIn[1]; /**< detain; */
229 /** @} */
230} VIRTIOSCSI_REQ_CMD_T, *PVIRTIOSCSI_REQ_CMD_T;
231#pragma pack()
232AssertCompileSize(VIRTIOSCSI_REQ_CMD_T, 19+8+12+6);
233
234/** @name VirtIO 1.0 SCSI Host Device Req command-specific response values
235 * @{ */
236#define VIRTIOSCSI_S_OK 0 /**< control, command */
237#define VIRTIOSCSI_S_OVERRUN 1 /**< control */
238#define VIRTIOSCSI_S_ABORTED 2 /**< control */
239#define VIRTIOSCSI_S_BAD_TARGET 3 /**< control, command */
240#define VIRTIOSCSI_S_RESET 4 /**< control */
241#define VIRTIOSCSI_S_BUSY 5 /**< control, command */
242#define VIRTIOSCSI_S_TRANSPORT_FAILURE 6 /**< control, command */
243#define VIRTIOSCSI_S_TARGET_FAILURE 7 /**< control, command */
244#define VIRTIOSCSI_S_NEXUS_FAILURE 8 /**< control, command */
245#define VIRTIOSCSI_S_FAILURE 9 /**< control, command */
246#define VIRTIOSCSI_S_INCORRECT_LUN 12 /**< command */
247/** @} */
248
249/** @name VirtIO 1.0 SCSI Host Device command-specific task_attr values
250 * @{ */
251#define VIRTIOSCSI_S_SIMPLE 0 /**< */
252#define VIRTIOSCSI_S_ORDERED 1 /**< */
253#define VIRTIOSCSI_S_HEAD 2 /**< */
254#define VIRTIOSCSI_S_ACA 3 /**< */
255/** @} */
256
257/**
258 * VirtIO 1.0 SCSI Host Device Control command before we know type (5.6.6.2)
259 */
260typedef struct VIRTIOSCSI_CTRL_T
261{
262 uint32_t uType;
263} VIRTIOSCSI_CTRL_T, *PVIRTIOSCSI_CTRL_T;
264
265/** @name VirtIO 1.0 SCSI Host Device command-specific TMF values
266 * @{ */
267#define VIRTIOSCSI_T_TMF 0 /**< */
268#define VIRTIOSCSI_T_TMF_ABORT_TASK 0 /**< */
269#define VIRTIOSCSI_T_TMF_ABORT_TASK_SET 1 /**< */
270#define VIRTIOSCSI_T_TMF_CLEAR_ACA 2 /**< */
271#define VIRTIOSCSI_T_TMF_CLEAR_TASK_SET 3 /**< */
272#define VIRTIOSCSI_T_TMF_I_T_NEXUS_RESET 4 /**< */
273#define VIRTIOSCSI_T_TMF_LOGICAL_UNIT_RESET 5 /**< */
274#define VIRTIOSCSI_T_TMF_QUERY_TASK 6 /**< */
275#define VIRTIOSCSI_T_TMF_QUERY_TASK_SET 7 /**< */
276/** @} */
277
278#pragma pack(1)
279typedef struct VIRTIOSCSI_CTRL_TMF_T
280{
281 uint32_t uType; /**< type */
282 uint32_t uSubtype; /**< subtype */
283 uint8_t abScsiLun[8]; /**< lun */
284 uint64_t uId; /**< id */
285} VIRTIOSCSI_CTRL_TMF_T, *PVIRTIOSCSI_CTRL_TMF_T;
286#pragma pack()
287AssertCompileSize(VIRTIOSCSI_CTRL_TMF_T, 24);
288
289/** VirtIO 1.0 section 5.6.6.2, CTRL TMF response is an 8-bit status */
290
291/** @name VirtIO 1.0 SCSI Host Device device specific tmf control response values
292 * @{ */
293#define VIRTIOSCSI_S_FUNCTION_COMPLETE 0 /**< */
294#define VIRTIOSCSI_S_FUNCTION_SUCCEEDED 10 /**< */
295#define VIRTIOSCSI_S_FUNCTION_REJECTED 11 /**< */
296/** @} */
297
298#define VIRTIOSCSI_T_AN_QUERY 1 /**< Asynchronous notification query */
299#define VIRTIOSCSI_T_AN_SUBSCRIBE 2 /**< Asynchronous notification subscription */
300
301#pragma pack(1)
302typedef struct VIRTIOSCSI_CTRL_AN_T
303{
304 uint32_t uType; /**< type */
305 uint8_t abScsiLun[8]; /**< lun */
306 uint32_t fEventsRequested; /**< event_requested */
307} VIRTIOSCSI_CTRL_AN_T, *PVIRTIOSCSI_CTRL_AN_T;
308#pragma pack()
309AssertCompileSize(VIRTIOSCSI_CTRL_AN_T, 16);
310
311/** VirtIO 1.0, Section 5.6.6.2, CTRL AN response is 4-byte evt mask + 8-bit status */
312
313typedef union VIRTIO_SCSI_CTRL_UNION_T
314{
315 VIRTIOSCSI_CTRL_T Type;
316 VIRTIOSCSI_CTRL_TMF_T Tmf;
317 VIRTIOSCSI_CTRL_AN_T AsyncNotify;
318 uint8_t ab[24];
319} VIRTIO_SCSI_CTRL_UNION_T, *PVIRTIO_SCSI_CTRL_UNION_T;
320AssertCompile(sizeof(VIRTIO_SCSI_CTRL_UNION_T) == 24); /* VIRTIOSCSI_CTRL_T forces 4 byte alignment, the other two are byte packed. */
321
322/** @name VirtIO 1.0 SCSI Host Device device specific tmf control response values
323 * @{ */
324#define VIRTIOSCSI_EVT_ASYNC_OPERATIONAL_CHANGE 2 /**< */
325#define VIRTIOSCSI_EVT_ASYNC_POWER_MGMT 4 /**< */
326#define VIRTIOSCSI_EVT_ASYNC_EXTERNAL_REQUEST 8 /**< */
327#define VIRTIOSCSI_EVT_ASYNC_MEDIA_CHANGE 16 /**< */
328#define VIRTIOSCSI_EVT_ASYNC_MULTI_HOST 32 /**< */
329#define VIRTIOSCSI_EVT_ASYNC_DEVICE_BUSY 64 /**< */
330/** @} */
331
332#define SUBSCRIBABLE_EVENTS \
333 ( VIRTIOSCSI_EVT_ASYNC_OPERATIONAL_CHANGE \
334 | VIRTIOSCSI_EVT_ASYNC_POWER_MGMT \
335 | VIRTIOSCSI_EVT_ASYNC_EXTERNAL_REQUEST \
336 | VIRTIOSCSI_EVT_ASYNC_MEDIA_CHANGE \
337 | VIRTIOSCSI_EVT_ASYNC_MULTI_HOST \
338 | VIRTIOSCSI_EVT_ASYNC_DEVICE_BUSY )
339
340#define SUPPORTED_EVENTS 0 /* TBD */
341
342/**
343 * Worker thread context, shared state.
344 */
345typedef struct VIRTIOSCSIWORKER
346{
347 SUPSEMEVENT hEvtProcess; /**< handle of associated sleep/wake-up semaphore */
348 bool volatile fSleeping; /**< Flags whether worker thread is sleeping or not */
349 bool volatile fNotified; /**< Flags whether worker thread notified */
350} VIRTIOSCSIWORKER;
351/** Pointer to a VirtIO SCSI worker. */
352typedef VIRTIOSCSIWORKER *PVIRTIOSCSIWORKER;
353
354/**
355 * Worker thread context, ring-3 state.
356 */
357typedef struct VIRTIOSCSIWORKERR3
358{
359 R3PTRTYPE(PPDMTHREAD) pThread; /**< pointer to worker thread's handle */
360 uint16_t auRedoDescs[VIRTQ_SIZE];/**< List of previously suspended reqs to re-submit */
361 uint16_t cRedoDescs; /**< Number of redo desc chain head desc idxes in list */
362} VIRTIOSCSIWORKERR3;
363/** Pointer to a VirtIO SCSI worker. */
364typedef VIRTIOSCSIWORKERR3 *PVIRTIOSCSIWORKERR3;
365
366/**
367 * State of a target attached to the VirtIO SCSI Host
368 */
369typedef struct VIRTIOSCSITARGET
370{
371 /** The ring-3 device instance so we can easily get our bearings. */
372 PPDMDEVINSR3 pDevIns;
373
374 /** Pointer to attached driver's base interface. */
375 R3PTRTYPE(PPDMIBASE) pDrvBase;
376
377 /** Target number (PDM LUN) */
378 uint32_t uTarget;
379
380 /** Target Description */
381 R3PTRTYPE(char *) pszTargetName;
382
383 /** Target base interface. */
384 PDMIBASE IBase;
385
386 /** Flag whether device is present. */
387 bool fPresent;
388
389 /** Media port interface. */
390 PDMIMEDIAPORT IMediaPort;
391
392 /** Pointer to the attached driver's media interface. */
393 R3PTRTYPE(PPDMIMEDIA) pDrvMedia;
394
395 /** Extended media port interface. */
396 PDMIMEDIAEXPORT IMediaExPort;
397
398 /** Pointer to the attached driver's extended media interface. */
399 R3PTRTYPE(PPDMIMEDIAEX) pDrvMediaEx;
400
401 /** Status LED interface */
402 PDMILEDPORTS ILed;
403
404 /** The status LED state for this device. */
405 PDMLED led;
406
407} VIRTIOSCSITARGET, *PVIRTIOSCSITARGET;
408
409/**
410 * VirtIO Host SCSI device state, shared edition.
411 *
412 * @extends VIRTIOCORE
413 */
414typedef struct VIRTIOSCSI
415{
416 /** The core virtio state. */
417 VIRTIOCORE Virtio;
418
419 /** VirtIO Host SCSI device runtime configuration parameters */
420 VIRTIOSCSI_CONFIG_T virtioScsiConfig;
421
422 bool fBootable;
423 bool afPadding0[3];
424
425 /** Number of targets in paTargetInstances. */
426 uint32_t cTargets;
427
428 /** Per device-bound virtq worker-thread contexts (eventq slot unused) */
429 VIRTIOSCSIWORKER aWorkers[VIRTIOSCSI_VIRTQ_CNT];
430
431 /** Instance name */
432 char szInstance[16];
433
434 /** Device-specific spec-based VirtIO VIRTQNAMEs */
435 char aszVirtqNames[VIRTIOSCSI_VIRTQ_CNT][VIRTIO_MAX_VIRTQ_NAME_SIZE];
436
437 /** Track which VirtIO queues we've attached to */
438 bool afVirtqAttached[VIRTIOSCSI_VIRTQ_CNT];
439
440 /** Set if events missed due to lack of bufs avail on eventq */
441 bool fEventsMissed;
442
443 /** Explicit alignment padding. */
444 bool afPadding1[2];
445
446 /** Mask of VirtIO Async Event types this device will deliver */
447 uint32_t fAsyncEvtsEnabled;
448
449 /** Total number of requests active across all targets */
450 volatile uint32_t cActiveReqs;
451
452
453 /** True if the guest/driver and VirtIO framework are in the ready state */
454 uint32_t fVirtioReady;
455
456 /** True if VIRTIO_SCSI_F_T10_PI was negotiated */
457 uint32_t fHasT10pi;
458
459 /** True if VIRTIO_SCSI_F_HOTPLUG was negotiated */
460 uint32_t fHasHotplug;
461
462 /** True if VIRTIO_SCSI_F_INOUT was negotiated */
463 uint32_t fHasInOutBufs;
464
465 /** True if VIRTIO_SCSI_F_CHANGE was negotiated */
466 uint32_t fHasLunChange;
467
468 /** True if in the process of resetting */
469 uint32_t fResetting;
470
471} VIRTIOSCSI;
472/** Pointer to the shared state of the VirtIO Host SCSI device. */
473typedef VIRTIOSCSI *PVIRTIOSCSI;
474
475
476/**
477 * VirtIO Host SCSI device state, ring-3 edition.
478 *
479 * @extends VIRTIOCORER3
480 */
481typedef struct VIRTIOSCSIR3
482{
483 /** The core virtio ring-3 state. */
484 VIRTIOCORER3 Virtio;
485
486 /** Array of per-target data. */
487 R3PTRTYPE(PVIRTIOSCSITARGET) paTargetInstances;
488
489 /** Per device-bound virtq worker-thread contexts (eventq slot unused) */
490 VIRTIOSCSIWORKERR3 aWorkers[VIRTIOSCSI_VIRTQ_CNT];
491
492 /** Device base interface. */
493 PDMIBASE IBase;
494
495 /** Pointer to the device instance.
496 * @note Only used in interface callbacks. */
497 PPDMDEVINSR3 pDevIns;
498
499 /** Status Target: LEDs port interface. */
500 PDMILEDPORTS ILeds;
501
502 /** IMediaExPort: Media ejection notification */
503 R3PTRTYPE(PPDMIMEDIANOTIFY) pMediaNotify;
504
505 /** Virtq to send tasks to R3. - HC ptr */
506 R3PTRTYPE(PPDMQUEUE) pNotifierVirtqR3;
507
508 /** True if in the process of quiescing I/O */
509 uint32_t fQuiescing;
510
511 /** For which purpose we're quiescing. */
512 VIRTIOVMSTATECHANGED enmQuiescingFor;
513
514} VIRTIOSCSIR3;
515/** Pointer to the ring-3 state of the VirtIO Host SCSI device. */
516typedef VIRTIOSCSIR3 *PVIRTIOSCSIR3;
517
518
519/**
520 * VirtIO Host SCSI device state, ring-0 edition.
521 */
522typedef struct VIRTIOSCSIR0
523{
524 /** The core virtio ring-0 state. */
525 VIRTIOCORER0 Virtio;
526} VIRTIOSCSIR0;
527/** Pointer to the ring-0 state of the VirtIO Host SCSI device. */
528typedef VIRTIOSCSIR0 *PVIRTIOSCSIR0;
529
530
531/**
532 * VirtIO Host SCSI device state, raw-mode edition.
533 */
534typedef struct VIRTIOSCSIRC
535{
536 /** The core virtio raw-mode state. */
537 VIRTIOCORERC Virtio;
538} VIRTIOSCSIRC;
539/** Pointer to the ring-0 state of the VirtIO Host SCSI device. */
540typedef VIRTIOSCSIRC *PVIRTIOSCSIRC;
541
542
543/** @typedef VIRTIOSCSICC
544 * The instance data for the current context. */
545typedef CTX_SUFF(VIRTIOSCSI) VIRTIOSCSICC;
546/** @typedef PVIRTIOSCSICC
547 * Pointer to the instance data for the current context. */
548typedef CTX_SUFF(PVIRTIOSCSI) PVIRTIOSCSICC;
549
550
551/**
552 * Request structure for IMediaEx (Associated Interfaces implemented by DrvSCSI)
553 * @note cbIn, cbOUt, cbDataOut mostly for debugging
554 */
555typedef struct VIRTIOSCSIREQ
556{
557 PDMMEDIAEXIOREQ hIoReq; /**< Handle of I/O request */
558 PVIRTIOSCSITARGET pTarget; /**< Target */
559 uint16_t uVirtqNbr; /**< Index of queue this request arrived on */
560 PVIRTQBUF pVirtqBuf; /**< Prepared desc chain pulled from virtq avail ring */
561 size_t cbDataIn; /**< size of datain buffer */
562 size_t cbDataOut; /**< size of dataout buffer */
563 uint16_t uDataInOff; /**< Fixed size of respHdr + sense (precede datain) */
564 uint16_t uDataOutOff; /**< Fixed size of reqhdr + cdb (precede dataout) */
565 uint32_t cbSenseAlloc; /**< Size of sense buffer */
566 size_t cbSenseLen; /**< Receives \# bytes written into sense buffer */
567 uint8_t *pbSense; /**< Pointer to R3 sense buffer */
568 PDMMEDIAEXIOREQSCSITXDIR enmTxDir; /**< Receives transfer direction of I/O req */
569 uint8_t uStatus; /**< SCSI status code */
570} VIRTIOSCSIREQ;
571typedef VIRTIOSCSIREQ *PVIRTIOSCSIREQ;
572
573
574/**
575 * callback_method_impl{VIRTIOCORER0,pfnVirtqNotified}
576 * @todo this causes burn if I prefix with at-sign. This callback is in VIRTIOCORER0 and VIRTIOCORER3
577 */
578static DECLCALLBACK(void) virtioScsiNotified(PPDMDEVINS pDevIns, PVIRTIOCORE pVirtio, uint16_t uVirtqNbr)
579{
580
581 RT_NOREF(pVirtio);
582 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
583
584 AssertReturnVoid(uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT);
585 PVIRTIOSCSIWORKER pWorker = &pThis->aWorkers[uVirtqNbr];
586
587#if defined (IN_RING3) && defined (LOG_ENABLED)
588 RTLogFlush(NULL);
589#endif
590
591 if (uVirtqNbr == CONTROLQ_IDX || IS_REQ_VIRTQ(uVirtqNbr))
592 {
593 Log6Func(("%s has available data\n", VIRTQNAME(uVirtqNbr)));
594 /* Wake queue's worker thread up if sleeping */
595 if (!ASMAtomicXchgBool(&pWorker->fNotified, true))
596 {
597 if (ASMAtomicReadBool(&pWorker->fSleeping))
598 {
599 Log6Func(("waking %s worker.\n", VIRTQNAME(uVirtqNbr)));
600 int rc = PDMDevHlpSUPSemEventSignal(pDevIns, pWorker->hEvtProcess);
601 AssertRC(rc);
602 }
603 }
604 }
605 else if (uVirtqNbr == EVENTQ_IDX)
606 {
607 Log3Func(("Driver queued buffer(s) to %s\n", VIRTQNAME(uVirtqNbr)));
608// if (ASMAtomicXchgBool(&pThis->fEventsMissed, false))
609// virtioScsiR3ReportEventsMissed(pDevIns, pThis, 0);
610 }
611 else
612 LogFunc(("Unexpected queue idx (ignoring): %d\n", uVirtqNbr));
613}
614
615
616#ifdef IN_RING3 /* spans most of the file, at the moment. */
617
618
619DECLINLINE(void) virtioScsiSetVirtqNames(PVIRTIOSCSI pThis)
620{
621 RTStrCopy(pThis->aszVirtqNames[CONTROLQ_IDX], VIRTIO_MAX_VIRTQ_NAME_SIZE, "controlq");
622 RTStrCopy(pThis->aszVirtqNames[EVENTQ_IDX], VIRTIO_MAX_VIRTQ_NAME_SIZE, "eventq");
623 for (uint16_t uVirtqNbr = VIRTQ_REQ_BASE; uVirtqNbr < VIRTQ_REQ_BASE + VIRTIOSCSI_REQ_VIRTQ_CNT; uVirtqNbr++)
624 RTStrPrintf(pThis->aszVirtqNames[uVirtqNbr], VIRTIO_MAX_VIRTQ_NAME_SIZE,
625 "requestq<%d>", uVirtqNbr - VIRTQ_REQ_BASE);
626}
627
628#ifdef LOG_ENABLED
629
630
631DECLINLINE(const char *) virtioGetTxDirText(uint32_t enmTxDir)
632{
633 switch (enmTxDir)
634 {
635 case PDMMEDIAEXIOREQSCSITXDIR_UNKNOWN: return "<UNKNOWN>";
636 case PDMMEDIAEXIOREQSCSITXDIR_FROM_DEVICE: return "<DEV-TO-GUEST>";
637 case PDMMEDIAEXIOREQSCSITXDIR_TO_DEVICE: return "<GUEST-TO-DEV>";
638 case PDMMEDIAEXIOREQSCSITXDIR_NONE: return "<NONE>";
639 default: return "<BAD ENUM>";
640 }
641}
642
643DECLINLINE(const char *) virtioGetTMFTypeText(uint32_t uSubType)
644{
645 switch (uSubType)
646 {
647 case VIRTIOSCSI_T_TMF_ABORT_TASK: return "ABORT TASK";
648 case VIRTIOSCSI_T_TMF_ABORT_TASK_SET: return "ABORT TASK SET";
649 case VIRTIOSCSI_T_TMF_CLEAR_ACA: return "CLEAR ACA";
650 case VIRTIOSCSI_T_TMF_CLEAR_TASK_SET: return "CLEAR TASK SET";
651 case VIRTIOSCSI_T_TMF_I_T_NEXUS_RESET: return "I T NEXUS RESET";
652 case VIRTIOSCSI_T_TMF_LOGICAL_UNIT_RESET: return "LOGICAL UNIT RESET";
653 case VIRTIOSCSI_T_TMF_QUERY_TASK: return "QUERY TASK";
654 case VIRTIOSCSI_T_TMF_QUERY_TASK_SET: return "QUERY TASK SET";
655 default: return "<unknown>";
656 }
657}
658
659DECLINLINE(const char *) virtioGetReqRespText(uint32_t vboxRc)
660{
661 switch (vboxRc)
662 {
663 case VIRTIOSCSI_S_OK: return "OK/COMPLETE";
664 case VIRTIOSCSI_S_OVERRUN: return "OVERRRUN";
665 case VIRTIOSCSI_S_ABORTED: return "ABORTED";
666 case VIRTIOSCSI_S_BAD_TARGET: return "BAD TARGET";
667 case VIRTIOSCSI_S_RESET: return "RESET";
668 case VIRTIOSCSI_S_TRANSPORT_FAILURE: return "TRANSPORT FAILURE";
669 case VIRTIOSCSI_S_TARGET_FAILURE: return "TARGET FAILURE";
670 case VIRTIOSCSI_S_NEXUS_FAILURE: return "NEXUS FAILURE";
671 case VIRTIOSCSI_S_BUSY: return "BUSY";
672 case VIRTIOSCSI_S_FAILURE: return "FAILURE";
673 case VIRTIOSCSI_S_INCORRECT_LUN: return "INCORRECT LUN";
674 case VIRTIOSCSI_S_FUNCTION_SUCCEEDED: return "FUNCTION SUCCEEDED";
675 case VIRTIOSCSI_S_FUNCTION_REJECTED: return "FUNCTION REJECTED";
676 default: return "<unknown>";
677 }
678}
679
680DECLINLINE(void) virtioGetControlAsyncMaskText(char *pszOutput, uint32_t cbOutput, uint32_t fAsyncTypesMask)
681{
682 RTStrPrintf(pszOutput, cbOutput, "%s%s%s%s%s%s",
683 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_OPERATIONAL_CHANGE ? "CHANGE_OPERATION " : "",
684 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_POWER_MGMT ? "POWER_MGMT " : "",
685 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_EXTERNAL_REQUEST ? "EXTERNAL_REQ " : "",
686 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_MEDIA_CHANGE ? "MEDIA_CHANGE " : "",
687 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_MULTI_HOST ? "MULTI_HOST " : "",
688 fAsyncTypesMask & VIRTIOSCSI_EVT_ASYNC_DEVICE_BUSY ? "DEVICE_BUSY " : "");
689}
690
691static uint8_t virtioScsiEstimateCdbLen(uint8_t uCmd, uint8_t cbMax)
692{
693 if (uCmd < 0x1f)
694 return RT_MIN(6, cbMax);
695 if (uCmd >= 0x20 && uCmd < 0x60)
696 return RT_MIN(10, cbMax);
697 if (uCmd >= 0x60 && uCmd < 0x80)
698 return cbMax;
699 if (uCmd >= 0x80 && uCmd < 0xa0)
700 return RT_MIN(16, cbMax);
701 if (uCmd >= 0xa0 && uCmd < 0xc0)
702 return RT_MIN(12, cbMax);
703 return cbMax;
704}
705
706#endif /* LOG_ENABLED */
707
708
709/*
710 * @todo Figure out how to implement this with R0 changes. Not used by current linux driver
711 */
712
713#if 0
714static int virtioScsiR3SendEvent(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget, uint32_t uEventType, uint32_t uReason)
715{
716 switch (uEventType)
717 {
718 case VIRTIOSCSI_T_NO_EVENT:
719 Log6Func(("(target=%d, LUN=%d): Warning event info guest queued is shorter than configured\n", uTarget, LUN0));
720 break;
721 case VIRTIOSCSI_T_NO_EVENT | VIRTIOSCSI_T_EVENTS_MISSED:
722 Log6Func(("(target=%d, LUN=%d): Warning driver that events were missed\n", uTarget, LUN0));
723 break;
724 case VIRTIOSCSI_T_TRANSPORT_RESET:
725 switch (uReason)
726 {
727 case VIRTIOSCSI_EVT_RESET_REMOVED:
728 Log6Func(("(target=%d, LUN=%d): Target or LUN removed\n", uTarget, LUN0));
729 break;
730 case VIRTIOSCSI_EVT_RESET_RESCAN:
731 Log6Func(("(target=%d, LUN=%d): Target or LUN added\n", uTarget, LUN0));
732 break;
733 case VIRTIOSCSI_EVT_RESET_HARD:
734 Log6Func(("(target=%d, LUN=%d): Target was reset\n", uTarget, LUN0));
735 break;
736 }
737 break;
738 case VIRTIOSCSI_T_ASYNC_NOTIFY:
739 {
740#ifdef LOG_ENABLED
741 char szTypeText[128];
742 virtioGetControlAsyncMaskText(szTypeText, sizeof(szTypeText), uReason);
743 Log6Func(("(target=%d, LUN=%d): Delivering subscribed async notification %s\n", uTarget, LUN0, szTypeText));
744#endif
745 break;
746 }
747 case VIRTIOSCSI_T_PARAM_CHANGE:
748 LogFunc(("(target=%d, LUN=%d): PARAM_CHANGE sense code: 0x%x sense qualifier: 0x%x\n",
749 uTarget, LUN0, uReason & 0xff, (uReason >> 8) & 0xff));
750 break;
751 default:
752 Log6Func(("(target=%d, LUN=%d): Unknown event type: %d, ignoring\n", uTarget, LUN0, uEventType));
753 return VINF_SUCCESS;
754 }
755
756 PVIRTQBUF pVirtqBuf = NULL;
757 int rc = virtioCoreR3VirtqAvailBufGet(pDevIns, &pThis->Virtio, EVENTQ_IDX, &pVirtqBuf, true);
758 if (rc == VERR_NOT_AVAILABLE)
759 {
760 LogFunc(("eventq is empty, events missed (driver didn't preload queue)!\n"));
761 ASMAtomicWriteBool(&pThis->fEventsMissed, true);
762 return VINF_SUCCESS;
763 }
764 AssertRCReturn(rc, rc);
765
766 VIRTIOSCSI_EVENT_T Event;
767 Event.uEvent = uEventType;
768 Event.uReason = uReason;
769 Event.abVirtioLun[0] = 1;
770 Event.abVirtioLun[1] = uTarget;
771 Event.abVirtioLun[2] = (LUN0 >> 8) & 0x40;
772 Event.abVirtioLun[3] = LUN0 & 0xff;
773 Event.abVirtioLun[4] = 0;
774 Event.abVirtioLun[5] = 0;
775 Event.abVirtioLun[6] = 0;
776 Event.abVirtioLun[7] = 0;
777
778 RTSGSEG aReqSegs[1];
779 aReqSegs[0].pvSeg = &Event;
780 aReqSegs[0].cbSeg = sizeof(Event);
781
782 RTSGBUF ReqSgBuf;
783 RTSgBufInit(&ReqSgBuf, aReqSegs, RT_ELEMENTS(aReqSegs));
784
785 rc = virtioCoreR3VirtqUsedBufPut(pDevIns, &pThis->Virtio, EVENTQ_IDX, &ReqSgBuf, pVirtqBuf, true /*fFence*/);
786 if (rc == VINF_SUCCESS)
787 virtioCoreVirtqUsedRingSync(pDevIns, &pThis->Virtio, EVENTQ_IDX, false);
788 else
789 LogRel(("Error writing control message to guest\n"));
790 virtioCoreR3VirtqBufRelease(&pThis->Virtio, pVirtqBuf);
791
792 return rc;
793}
794#endif
795
796/** Internal worker. */
797static void virtioScsiR3FreeReq(PVIRTIOSCSITARGET pTarget, PVIRTIOSCSIREQ pReq)
798{
799 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pTarget->pDevIns, PVIRTIOSCSI);
800 RTMemFree(pReq->pbSense);
801 pReq->pbSense = NULL;
802 virtioCoreR3VirtqBufRelease(&pThis->Virtio, pReq->pVirtqBuf);
803 pReq->pVirtqBuf = NULL;
804 pTarget->pDrvMediaEx->pfnIoReqFree(pTarget->pDrvMediaEx, pReq->hIoReq);
805}
806
807/**
808 * This is called to complete a request immediately
809 *
810 * @param pDevIns The device instance.
811 * @param pThis VirtIO SCSI shared instance data.
812 * @param pThisCC VirtIO SCSI ring-3 instance data.
813 * @param uVirtqNbr Virtq index
814 * @param pVirtqBuf Pointer to pre-processed descriptor chain pulled from virtq
815 * @param pRespHdr Response header
816 * @param pbSense Pointer to sense buffer or NULL if none.
817 * @param cbSenseCfg The configured sense buffer size.
818 *
819 * @returns VINF_SUCCESS
820 */
821static int virtioScsiR3ReqErr(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, PVIRTIOSCSICC pThisCC, uint16_t uVirtqNbr,
822 PVIRTQBUF pVirtqBuf, REQ_RESP_HDR_T *pRespHdr, uint8_t *pbSense,
823 size_t cbSenseCfg)
824{
825 Log2Func((" status: %s response: %s\n",
826 SCSIStatusText(pRespHdr->uStatus), virtioGetReqRespText(pRespHdr->uResponse)));
827
828 RTSGSEG aReqSegs[2];
829
830 /* Segment #1: Response header*/
831 aReqSegs[0].pvSeg = pRespHdr;
832 aReqSegs[0].cbSeg = sizeof(*pRespHdr);
833
834 /* Segment #2: Sense data. */
835 uint8_t abSenseBuf[VIRTIOSCSI_SENSE_SIZE_MAX];
836 AssertCompile(VIRTIOSCSI_SENSE_SIZE_MAX <= 4096);
837 Assert(cbSenseCfg <= sizeof(abSenseBuf));
838
839 RT_ZERO(abSenseBuf);
840 if (pbSense && pRespHdr->cbSenseLen)
841 memcpy(abSenseBuf, pbSense, RT_MIN(pRespHdr->cbSenseLen, sizeof(abSenseBuf)));
842 else
843 pRespHdr->cbSenseLen = 0;
844
845 aReqSegs[1].pvSeg = abSenseBuf;
846 aReqSegs[1].cbSeg = cbSenseCfg;
847
848 /* Init S/G buffer. */
849 RTSGBUF ReqSgBuf;
850 RTSgBufInit(&ReqSgBuf, aReqSegs, RT_ELEMENTS(aReqSegs));
851
852 if (pThis->fResetting)
853 pRespHdr->uResponse = VIRTIOSCSI_S_RESET;
854
855 virtioCoreR3VirtqUsedBufPut(pDevIns, &pThis->Virtio, uVirtqNbr, &ReqSgBuf, pVirtqBuf, true /* fFence */);
856 virtioCoreVirtqUsedRingSync(pDevIns, &pThis->Virtio, uVirtqNbr);
857
858 if (!ASMAtomicDecU32(&pThis->cActiveReqs) && pThisCC->fQuiescing)
859 PDMDevHlpAsyncNotificationCompleted(pDevIns);
860
861 Log2(("---------------------------------------------------------------------------------\n"));
862
863 return VINF_SUCCESS;
864}
865
866
867/**
868 * Variant of virtioScsiR3ReqErr that takes four (4) REQ_RESP_HDR_T member
869 * fields rather than a pointer to an initialized structure.
870 *
871 * @param pDevIns The device instance.
872 * @param pThis VirtIO SCSI shared instance data.
873 * @param pThisCC VirtIO SCSI ring-3 instance data.
874 * @param uVirtqNbr Virtq index
875 * @param pVirtqBuf Pointer to pre-processed descriptor chain pulled from virtq
876 * @param cbResidual The number of residual bytes or something like that.
877 * @param bStatus The SCSI status code.
878 * @param bResponse The virtio SCSI response code.
879 * @param pbSense Pointer to sense buffer or NULL if none.
880 * @param cbSense The number of bytes of sense data. Zero if none.
881 * @param cbSenseCfg The configured sense buffer size.
882 *
883 * @returns VINF_SUCCESS
884 */
885static int virtioScsiR3ReqErr4(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, PVIRTIOSCSICC pThisCC, uint16_t uVirtqNbr,
886 PVIRTQBUF pVirtqBuf, size_t cbResidual, uint8_t bStatus, uint8_t bResponse,
887 uint8_t *pbSense, size_t cbSense, size_t cbSenseCfg)
888{
889 REQ_RESP_HDR_T RespHdr;
890 RespHdr.cbSenseLen = cbSense & UINT32_MAX;
891 RespHdr.uResidual = cbResidual & UINT32_MAX;
892 RespHdr.uStatusQualifier = 0;
893 RespHdr.uStatus = bStatus;
894 RespHdr.uResponse = bResponse;
895
896 return virtioScsiR3ReqErr(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, &RespHdr, pbSense, cbSenseCfg);
897}
898
899static void virtioScsiR3SenseKeyToVirtioResp(REQ_RESP_HDR_T *respHdr, uint8_t uSenseKey)
900{
901 switch (uSenseKey)
902 {
903 case SCSI_SENSE_ABORTED_COMMAND:
904 respHdr->uResponse = VIRTIOSCSI_S_ABORTED;
905 break;
906 case SCSI_SENSE_COPY_ABORTED:
907 respHdr->uResponse = VIRTIOSCSI_S_ABORTED;
908 break;
909 case SCSI_SENSE_UNIT_ATTENTION:
910 respHdr->uResponse = VIRTIOSCSI_S_TARGET_FAILURE;
911 break;
912 case SCSI_SENSE_HARDWARE_ERROR:
913 respHdr->uResponse = VIRTIOSCSI_S_TARGET_FAILURE;
914 break;
915 case SCSI_SENSE_NOT_READY:
916 /* Not sure what to return for this. See choices at VirtIO 1.0, 5.6.6.1.1 */
917 respHdr->uResponse = VIRTIOSCSI_S_FAILURE;
918 /* respHdr->uResponse = VIRTIOSCSI_S_BUSY; */ /* BUSY is VirtIO's 'retryable' response */
919 break;
920 default:
921 respHdr->uResponse = VIRTIOSCSI_S_FAILURE;
922 break;
923 }
924}
925
926/**
927 * @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCompleteNotify}
928 */
929static DECLCALLBACK(int) virtioScsiR3IoReqFinish(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
930 void *pvIoReqAlloc, int rcReq)
931{
932 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaExPort);
933 PPDMDEVINS pDevIns = pTarget->pDevIns;
934 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
935 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
936 PPDMIMEDIAEX pIMediaEx = pTarget->pDrvMediaEx;
937 PVIRTIOSCSIREQ pReq = (PVIRTIOSCSIREQ)pvIoReqAlloc;
938
939 size_t cbResidual = 0;
940 int rc = pIMediaEx->pfnIoReqQueryResidual(pIMediaEx, hIoReq, &cbResidual);
941 AssertRC(rc);
942
943 size_t cbXfer = 0;
944 rc = pIMediaEx->pfnIoReqQueryXferSize(pIMediaEx, hIoReq, &cbXfer);
945 AssertRC(rc);
946
947 /* Masking deals with data type size discrepancies between
948 * The APIs (virtio and VBox). Windows C-compiler complains otherwise */
949 Assert(!(cbXfer & 0xffffffff00000000));
950 uint32_t cbXfer32 = cbXfer & 0xffffffff;
951 REQ_RESP_HDR_T respHdr = { 0 };
952 respHdr.cbSenseLen = pReq->pbSense[2] == SCSI_SENSE_NONE ? 0 : (uint32_t)pReq->cbSenseLen;
953 AssertMsg(!(cbResidual & 0xffffffff00000000),
954 ("WARNING: Residual size larger than sizeof(uint32_t), truncating"));
955 respHdr.uResidual = (uint32_t)(cbResidual & 0xffffffff);
956 respHdr.uStatus = pReq->uStatus;
957
958 /* VirtIO 1.0 spec 5.6.6.1.1 says device MUST return a VirtIO response byte value.
959 * Some are returned during the submit phase, and a few are not mapped at all,
960 * wherein anything that can't map specifically gets mapped to VIRTIOSCSI_S_FAILURE
961 */
962 if (pThis->fResetting)
963 respHdr.uResponse = VIRTIOSCSI_S_RESET;
964 else
965 {
966 switch (rcReq)
967 {
968 case SCSI_STATUS_OK:
969 {
970 if (pReq->uStatus != SCSI_STATUS_CHECK_CONDITION)
971 respHdr.uResponse = VIRTIOSCSI_S_OK;
972 else
973 virtioScsiR3SenseKeyToVirtioResp(&respHdr, pReq->pbSense[2]);
974 break;
975 }
976 case SCSI_STATUS_CHECK_CONDITION:
977 virtioScsiR3SenseKeyToVirtioResp(&respHdr, pReq->pbSense[2]);
978 break;
979
980 default:
981 respHdr.uResponse = VIRTIOSCSI_S_FAILURE;
982 break;
983 }
984 }
985
986 Log2Func(("status: (%d) %s, response: (%d) %s\n", pReq->uStatus, SCSIStatusText(pReq->uStatus),
987 respHdr.uResponse, virtioGetReqRespText(respHdr.uResponse)));
988
989 if (RT_FAILURE(rcReq))
990 Log2Func(("rcReq: %Rrc\n", rcReq));
991
992 if (LogIs3Enabled())
993 {
994 LogFunc(("cbDataIn = %u, cbDataOut = %u (cbIn = %u, cbOut = %u)\n",
995 pReq->cbDataIn, pReq->cbDataOut, pReq->pVirtqBuf->cbPhysReturn, pReq->pVirtqBuf->cbPhysSend));
996 LogFunc(("xfer = %lu, residual = %u\n", cbXfer, cbResidual));
997 LogFunc(("xfer direction: %s, sense written = %d, sense size = %d\n",
998 virtioGetTxDirText(pReq->enmTxDir), respHdr.cbSenseLen, pThis->virtioScsiConfig.uSenseSize));
999 }
1000
1001 if (respHdr.cbSenseLen && LogIs2Enabled())
1002 {
1003 LogFunc(("Sense: %s\n", SCSISenseText(pReq->pbSense[2])));
1004 LogFunc(("Sense Ext3: %s\n", SCSISenseExtText(pReq->pbSense[12], pReq->pbSense[13])));
1005 }
1006
1007 if ( (VIRTIO_IS_IN_DIRECTION(pReq->enmTxDir) && cbXfer32 > pReq->cbDataIn)
1008 || (VIRTIO_IS_OUT_DIRECTION(pReq->enmTxDir) && cbXfer32 > pReq->cbDataOut))
1009 {
1010 Log2Func((" * * * * Data overrun, returning sense\n"));
1011 uint8_t abSense[] = { RT_BIT(7) | SCSI_SENSE_RESPONSE_CODE_CURR_FIXED,
1012 0, SCSI_SENSE_ILLEGAL_REQUEST, 0, 0, 0, 0, 10, 0, 0, 0 };
1013 respHdr.cbSenseLen = sizeof(abSense);
1014 respHdr.uStatus = SCSI_STATUS_CHECK_CONDITION;
1015 respHdr.uResponse = VIRTIOSCSI_S_OVERRUN;
1016 respHdr.uResidual = pReq->cbDataIn & UINT32_MAX;
1017
1018 virtioScsiR3ReqErr(pDevIns, pThis, pThisCC, pReq->uVirtqNbr, pReq->pVirtqBuf, &respHdr, abSense,
1019 RT_MIN(pThis->virtioScsiConfig.uSenseSize, VIRTIOSCSI_SENSE_SIZE_MAX));
1020 }
1021 else
1022 {
1023 Assert(pReq->pbSense != NULL);
1024
1025 /* req datain bytes already in guest phys mem. via virtioScsiIoReqCopyFromBuf() */
1026 RTSGSEG aReqSegs[2];
1027
1028 aReqSegs[0].pvSeg = &respHdr;
1029 aReqSegs[0].cbSeg = sizeof(respHdr);
1030
1031 aReqSegs[1].pvSeg = pReq->pbSense;
1032 aReqSegs[1].cbSeg = pReq->cbSenseAlloc; /* VirtIO 1.0 spec 5.6.4/5.6.6.1 */
1033
1034 RTSGBUF ReqSgBuf;
1035 RTSgBufInit(&ReqSgBuf, aReqSegs, RT_ELEMENTS(aReqSegs));
1036
1037 size_t cbReqSgBuf = RTSgBufCalcTotalLength(&ReqSgBuf);
1038 /** @todo r=bird: Returning here looks a little bogus... */
1039 AssertMsgReturn(cbReqSgBuf <= pReq->pVirtqBuf->cbPhysReturn,
1040 ("Guest expected less req data (space needed: %zu, avail: %u)\n",
1041 cbReqSgBuf, pReq->pVirtqBuf->cbPhysReturn),
1042 VERR_BUFFER_OVERFLOW);
1043
1044 virtioCoreR3VirtqUsedBufPut(pDevIns, &pThis->Virtio, pReq->uVirtqNbr, &ReqSgBuf, pReq->pVirtqBuf, true /* fFence TBD */);
1045 virtioCoreVirtqUsedRingSync(pDevIns, &pThis->Virtio, pReq->uVirtqNbr);
1046
1047 Log2(("-----------------------------------------------------------------------------------------\n"));
1048 }
1049
1050 virtioScsiR3FreeReq(pTarget, pReq);
1051
1052 if (!ASMAtomicDecU32(&pThis->cActiveReqs) && pThisCC->fQuiescing)
1053 PDMDevHlpAsyncNotificationCompleted(pDevIns);
1054
1055 return rc;
1056}
1057
1058/**
1059 * @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCopyFromBuf}
1060
1061 * Copy virtual memory from VSCSI layer to guest physical memory
1062 */
1063static DECLCALLBACK(int) virtioScsiR3IoReqCopyFromBuf(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1064 void *pvIoReqAlloc, uint32_t offDst, PRTSGBUF pSgBuf, size_t cbCopy)
1065{
1066 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaExPort);
1067 PPDMDEVINS pDevIns = pTarget->pDevIns;
1068 PVIRTIOSCSIREQ pReq = (PVIRTIOSCSIREQ)pvIoReqAlloc;
1069 RT_NOREF(hIoReq, cbCopy);
1070
1071 if (!pReq->cbDataIn)
1072 return VINF_SUCCESS;
1073
1074 AssertReturn(pReq->pVirtqBuf, VERR_INVALID_PARAMETER);
1075
1076 PVIRTIOSGBUF pSgPhysReturn = pReq->pVirtqBuf->pSgPhysReturn;
1077 virtioCoreGCPhysChainAdvance(pSgPhysReturn, offDst);
1078
1079 size_t cbCopied = 0;
1080 size_t cbRemain = pReq->cbDataIn;
1081
1082 /* Skip past the REQ_RESP_HDR_T and sense code if we're at the start of the buffer. */
1083 if (!pSgPhysReturn->idxSeg && pSgPhysReturn->cbSegLeft == pSgPhysReturn->paSegs[0].cbSeg)
1084 virtioCoreGCPhysChainAdvance(pSgPhysReturn, pReq->uDataInOff);
1085
1086 while (cbRemain)
1087 {
1088 cbCopied = RT_MIN(pSgBuf->cbSegLeft, pSgPhysReturn->cbSegLeft);
1089 Assert(cbCopied > 0);
1090 PDMDevHlpPCIPhysWriteUser(pDevIns, pSgPhysReturn->GCPhysCur, pSgBuf->pvSegCur, cbCopied);
1091 RTSgBufAdvance(pSgBuf, cbCopied);
1092 virtioCoreGCPhysChainAdvance(pSgPhysReturn, cbCopied);
1093 cbRemain -= cbCopied;
1094 }
1095 RT_UNTRUSTED_NONVOLATILE_COPY_FENCE(); /* needed? */
1096
1097 Log3Func((".... Copied %lu bytes from %lu byte guest buffer, residual=%lu\n",
1098 cbCopy, pReq->pVirtqBuf->cbPhysReturn, pReq->pVirtqBuf->cbPhysReturn - cbCopy));
1099
1100 return VINF_SUCCESS;
1101}
1102
1103/**
1104 * @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqCopyToBuf}
1105 *
1106 * Copy guest physical memory to VSCSI layer virtual memory
1107 */
1108static DECLCALLBACK(int) virtioScsiR3IoReqCopyToBuf(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
1109 void *pvIoReqAlloc, uint32_t offSrc, PRTSGBUF pSgBuf, size_t cbCopy)
1110{
1111 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaExPort);
1112 PPDMDEVINS pDevIns = pTarget->pDevIns;
1113 PVIRTIOSCSIREQ pReq = (PVIRTIOSCSIREQ)pvIoReqAlloc;
1114 RT_NOREF(hIoReq, cbCopy);
1115
1116 if (!pReq->cbDataOut)
1117 return VINF_SUCCESS;
1118
1119 PVIRTIOSGBUF pSgPhysSend = pReq->pVirtqBuf->pSgPhysSend;
1120 virtioCoreGCPhysChainAdvance(pSgPhysSend, offSrc);
1121
1122 size_t cbCopied = 0;
1123 size_t cbRemain = pReq->cbDataOut;
1124 while (cbRemain)
1125 {
1126 cbCopied = RT_MIN(pSgBuf->cbSegLeft, pSgPhysSend->cbSegLeft);
1127 Assert(cbCopied > 0);
1128 PDMDevHlpPCIPhysReadUser(pDevIns, pSgPhysSend->GCPhysCur, pSgBuf->pvSegCur, cbCopied);
1129 RTSgBufAdvance(pSgBuf, cbCopied);
1130 virtioCoreGCPhysChainAdvance(pSgPhysSend, cbCopied);
1131 cbRemain -= cbCopied;
1132 }
1133
1134 Log2Func((".... Copied %lu bytes to %lu byte guest buffer, residual=%lu\n",
1135 cbCopy, pReq->pVirtqBuf->cbPhysReturn, pReq->pVirtqBuf->cbPhysReturn - cbCopy));
1136
1137 return VINF_SUCCESS;
1138}
1139
1140/**
1141 * Handles request queues for/on a worker thread.
1142 *
1143 * @returns VBox status code (logged by caller).
1144 */
1145static int virtioScsiR3ReqSubmit(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, PVIRTIOSCSICC pThisCC,
1146 uint16_t uVirtqNbr, PVIRTQBUF pVirtqBuf)
1147{
1148
1149 ASMAtomicIncU32(&pThis->cActiveReqs);
1150
1151 /*
1152 * Validate configuration values we use here before we start.
1153 */
1154 uint32_t const cbCdb = pThis->virtioScsiConfig.uCdbSize;
1155 uint32_t const cbSenseCfg = pThis->virtioScsiConfig.uSenseSize;
1156 /** @todo Report these as errors to the guest or does the caller do that? */
1157 ASSERT_GUEST_LOGREL_MSG_RETURN(cbCdb <= VIRTIOSCSI_CDB_SIZE_MAX, ("cbCdb=%#x\n", cbCdb), VERR_OUT_OF_RANGE);
1158 ASSERT_GUEST_LOGREL_MSG_RETURN(cbSenseCfg <= VIRTIOSCSI_SENSE_SIZE_MAX, ("cbSenseCfg=%#x\n", cbSenseCfg), VERR_OUT_OF_RANGE);
1159
1160 /*
1161 * Extract command header and CDB from guest physical memory
1162 * The max size is rather small here (19 + 255 = 274), so put
1163 * it on the stack.
1164 */
1165 size_t const cbReqHdr = sizeof(REQ_CMD_HDR_T) + cbCdb;
1166 AssertReturn(pVirtqBuf && pVirtqBuf->cbPhysSend >= cbReqHdr, VERR_INVALID_PARAMETER);
1167
1168 AssertCompile(VIRTIOSCSI_CDB_SIZE_MAX < 4096);
1169 union
1170 {
1171 RT_GCC_EXTENSION struct
1172 {
1173 REQ_CMD_HDR_T ReqHdr;
1174 uint8_t abCdb[VIRTIOSCSI_CDB_SIZE_MAX];
1175 } ;
1176 uint8_t ab[sizeof(REQ_CMD_HDR_T) + VIRTIOSCSI_CDB_SIZE_MAX];
1177 uint64_t au64Align[(sizeof(REQ_CMD_HDR_T) + VIRTIOSCSI_CDB_SIZE_MAX) / sizeof(uint64_t)];
1178 } VirtqReq;
1179 RT_ZERO(VirtqReq);
1180
1181 for (size_t offReq = 0; offReq < cbReqHdr; )
1182 {
1183 size_t cbSeg = cbReqHdr - offReq;
1184 RTGCPHYS GCPhys = virtioCoreGCPhysChainGetNextSeg(pVirtqBuf->pSgPhysSend, &cbSeg);
1185 PDMDevHlpPCIPhysReadMeta(pDevIns, GCPhys, &VirtqReq.ab[offReq], cbSeg);
1186 offReq += cbSeg;
1187 }
1188
1189 uint8_t const uType = VirtqReq.ReqHdr.abVirtioLun[0];
1190 uint8_t const uTarget = VirtqReq.ReqHdr.abVirtioLun[1];
1191 uint32_t uScsiLun = RT_MAKE_U16(VirtqReq.ReqHdr.abVirtioLun[3], VirtqReq.ReqHdr.abVirtioLun[2]) & 0x3fff;
1192
1193 bool fBadLUNFormat = false;
1194 if (uType == 0xc1 && uTarget == 0x01)
1195 {
1196 LogRel(("* * * WARNING: REPORT LUNS LU ACCESSED. FEATURE NOT IMPLEMENTED SEE DevVirtioScsi.cpp * * * "));
1197 /* Force rejection. */ /** @todo figure out right way to handle. Note this is a very
1198 * vague and confusing part of the VirtIO spec (which deviates from the SCSI standard).
1199 * I have not been able to determine how to implement this properly. I've checked the
1200 * source code of Guest drivers, and so far none seem to use it. If this message is logged,
1201 * meaning a guest expects this feature, implementing it can be re-visited */
1202 uScsiLun = 0xff;
1203 }
1204 else
1205 if (uType != 1)
1206 fBadLUNFormat = true;
1207
1208 LogFunc(("[%s] (Target: %d LUN: %d) CDB: %.*Rhxs\n",
1209 SCSICmdText(VirtqReq.abCdb[0]), uTarget, uScsiLun,
1210 virtioScsiEstimateCdbLen(VirtqReq.abCdb[0], cbCdb), &VirtqReq.abCdb[0]));
1211
1212 Log3Func(("cmd id: %RX64, attr: %x, prio: %d, crn: %x\n",
1213 VirtqReq.ReqHdr.uId, VirtqReq.ReqHdr.uTaskAttr, VirtqReq.ReqHdr.uPrio, VirtqReq.ReqHdr.uCrn));
1214
1215 /*
1216 * Calculate request offsets and data sizes.
1217 */
1218 uint32_t const offDataOut = sizeof(REQ_CMD_HDR_T) + cbCdb;
1219 uint32_t const offDataIn = sizeof(REQ_RESP_HDR_T) + cbSenseCfg;
1220 size_t const cbDataOut = pVirtqBuf->cbPhysSend - offDataOut;
1221 /** @todo r=bird: Validate cbPhysReturn properly? I've just RT_MAX'ed it for now. */
1222 size_t const cbDataIn = RT_MAX(pVirtqBuf->cbPhysReturn, offDataIn) - offDataIn;
1223 Assert(offDataOut <= UINT16_MAX);
1224 Assert(offDataIn <= UINT16_MAX);
1225
1226 /*
1227 * Handle submission errors
1228 */
1229 if (RT_LIKELY(!fBadLUNFormat))
1230 { /* likely */ }
1231 else
1232 {
1233 Log2Func(("Error submitting request, bad LUN format\n"));
1234 return virtioScsiR3ReqErr4(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, cbDataIn + cbDataOut, 0 /*bStatus*/,
1235 VIRTIOSCSI_S_FAILURE, NULL /*pbSense*/, 0 /*cbSense*/, cbSenseCfg);
1236 }
1237
1238 PVIRTIOSCSITARGET const pTarget = &pThisCC->paTargetInstances[uTarget];
1239 if (RT_LIKELY( uTarget < pThis->cTargets
1240 && pTarget->fPresent
1241 && pTarget->pDrvMediaEx))
1242 { /* likely */ }
1243 else
1244 {
1245 Log2Func(("Error submitting request to bad target (%d) or bad LUN (%d)\n", uTarget, uScsiLun));
1246 uint8_t abSense[] = { RT_BIT(7) | SCSI_SENSE_RESPONSE_CODE_CURR_FIXED,
1247 0, SCSI_SENSE_ILLEGAL_REQUEST,
1248 0, 0, 0, 0, 10, SCSI_ASC_LOGICAL_UNIT_NOT_SUPPORTED, 0, 0 };
1249 return virtioScsiR3ReqErr4(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, cbDataIn + cbDataOut, SCSI_STATUS_CHECK_CONDITION,
1250 VIRTIOSCSI_S_BAD_TARGET, abSense, sizeof(abSense), cbSenseCfg);
1251 }
1252 if (RT_LIKELY(uScsiLun == 0))
1253 { /* likely */ }
1254 else
1255 {
1256 Log2Func(("Error submitting request to bad target (%d) or bad LUN (%d)\n", uTarget, uScsiLun));
1257 uint8_t abSense[] = { RT_BIT(7) | SCSI_SENSE_RESPONSE_CODE_CURR_FIXED,
1258 0, SCSI_SENSE_ILLEGAL_REQUEST,
1259 0, 0, 0, 0, 10, SCSI_ASC_LOGICAL_UNIT_NOT_SUPPORTED, 0, 0 };
1260 return virtioScsiR3ReqErr4(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, cbDataIn + cbDataOut, SCSI_STATUS_CHECK_CONDITION,
1261 VIRTIOSCSI_S_OK, abSense, sizeof(abSense), cbSenseCfg);
1262 }
1263 if (RT_LIKELY(!pThis->fResetting))
1264 { /* likely */ }
1265 else
1266 {
1267 Log2Func(("Aborting req submission because reset is in progress\n"));
1268 return virtioScsiR3ReqErr4(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, cbDataIn + cbDataOut, SCSI_STATUS_OK,
1269 VIRTIOSCSI_S_RESET, NULL /*pbSense*/, 0 /*cbSense*/, cbSenseCfg);
1270 }
1271
1272#if 0
1273 if (RT_LIKELY(!cbDataIn || !cbDataOut || pThis->fHasInOutBufs)) /* VirtIO 1.0, 5.6.6.1.1 */
1274 { /* likely */ }
1275 else
1276 {
1277 Log2Func(("Error submitting request, got datain & dataout bufs w/o INOUT feature negotated\n"));
1278 uint8_t abSense[] = { RT_BIT(7) | SCSI_SENSE_RESPONSE_CODE_CURR_FIXED,
1279 0, SCSI_SENSE_ILLEGAL_REQUEST, 0, 0, 0, 0, 10, 0, 0, 0 };
1280 return virtioScsiR3ReqErr4(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, cbDataIn + cbDataOut, SCSI_STATUS_CHECK_CONDITION,
1281 VIRTIOSCSI_S_FAILURE, abSense, sizeof(abSense), cbSenseCfg);
1282 }
1283#endif
1284 /*
1285 * Have underlying driver allocate a req of size set during initialization of this device.
1286 */
1287 PDMMEDIAEXIOREQ hIoReq = NULL;
1288 PVIRTIOSCSIREQ pReq = NULL;
1289 PPDMIMEDIAEX pIMediaEx = pTarget->pDrvMediaEx;
1290
1291 int rc = pIMediaEx->pfnIoReqAlloc(pIMediaEx, &hIoReq, (void **)&pReq, 0 /* uIoReqId */,
1292 PDMIMEDIAEX_F_SUSPEND_ON_RECOVERABLE_ERR);
1293
1294 AssertMsgRCReturn(rc, ("Failed to allocate I/O request, rc=%Rrc\n", rc), rc);
1295
1296 pReq->hIoReq = hIoReq;
1297 pReq->pTarget = pTarget;
1298 pReq->uVirtqNbr = uVirtqNbr;
1299 pReq->cbDataIn = cbDataIn;
1300 pReq->cbDataOut = cbDataOut;
1301 pReq->pVirtqBuf = pVirtqBuf;
1302 virtioCoreR3VirtqBufRetain(pVirtqBuf); /* (For pReq->pVirtqBuf. Released by virtioScsiR3FreeReq.) */
1303 pReq->uDataInOff = offDataIn;
1304 pReq->uDataOutOff = offDataOut;
1305
1306 pReq->cbSenseAlloc = cbSenseCfg;
1307 pReq->pbSense = (uint8_t *)RTMemAllocZ(pReq->cbSenseAlloc);
1308 AssertMsgReturnStmt(pReq->pbSense, ("Out of memory allocating sense buffer"),
1309 virtioScsiR3FreeReq(pTarget, pReq);, VERR_NO_MEMORY);
1310
1311 /* Note: DrvSCSI allocates one virtual memory buffer for input and output phases of the request */
1312 rc = pIMediaEx->pfnIoReqSendScsiCmd(pIMediaEx, pReq->hIoReq, uScsiLun,
1313 &VirtqReq.abCdb[0], cbCdb,
1314 PDMMEDIAEXIOREQSCSITXDIR_UNKNOWN, &pReq->enmTxDir,
1315 RT_MAX(cbDataIn, cbDataOut),
1316 pReq->pbSense, pReq->cbSenseAlloc, &pReq->cbSenseLen,
1317 &pReq->uStatus, RT_MS_30SEC);
1318
1319 if (rc != VINF_PDM_MEDIAEX_IOREQ_IN_PROGRESS)
1320 {
1321 /*
1322 * Getting here means the request failed in early in the submission to the lower level driver,
1323 * and there will be no callback to the finished/completion function for this request
1324 */
1325 Assert(RT_FAILURE_NP(rc));
1326 Log2Func(("Request-submission error from lower-level driver\n"));
1327 uint8_t uASC, uASCQ = 0;
1328 switch (rc)
1329 {
1330 case VERR_NO_MEMORY:
1331 uASC = SCSI_ASC_SYSTEM_RESOURCE_FAILURE;
1332 break;
1333 default:
1334 uASC = SCSI_ASC_INTERNAL_TARGET_FAILURE;
1335 break;
1336 }
1337 uint8_t abSense[] = { RT_BIT(7) | SCSI_SENSE_RESPONSE_CODE_CURR_FIXED,
1338 0, SCSI_SENSE_VENDOR_SPECIFIC,
1339 0, 0, 0, 0, 10, uASC, uASCQ, 0 };
1340 REQ_RESP_HDR_T respHdr = { 0 };
1341 respHdr.cbSenseLen = sizeof(abSense);
1342 respHdr.uStatus = SCSI_STATUS_CHECK_CONDITION;
1343 respHdr.uResponse = VIRTIOSCSI_S_FAILURE;
1344 respHdr.uResidual = (cbDataIn + cbDataOut) & UINT32_MAX;
1345 virtioScsiR3ReqErr(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf, &respHdr, abSense, cbSenseCfg);
1346 virtioScsiR3FreeReq(pTarget, pReq);
1347 }
1348 return VINF_SUCCESS;
1349}
1350
1351/**
1352 * Handles control transfers for/on a worker thread.
1353 *
1354 * @returns VBox status code (ignored by the caller).
1355 * @param pDevIns The device instance.
1356 * @param pThis VirtIO SCSI shared instance data.
1357 * @param pThisCC VirtIO SCSI ring-3 instance data.
1358 * @param uVirtqNbr CONTROLQ_IDX
1359 * @param pVirtqBuf Descriptor chain to process.
1360 */
1361static int virtioScsiR3Ctrl(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, PVIRTIOSCSICC pThisCC,
1362 uint16_t uVirtqNbr, PVIRTQBUF pVirtqBuf)
1363{
1364 AssertReturn(pVirtqBuf->cbPhysSend >= RT_MIN(sizeof(VIRTIOSCSI_CTRL_AN_T),
1365 sizeof(VIRTIOSCSI_CTRL_TMF_T)), 0);
1366
1367 /*
1368 * Allocate buffer and read in the control command
1369 */
1370 VIRTIO_SCSI_CTRL_UNION_T ScsiCtrlUnion;
1371 RT_ZERO(ScsiCtrlUnion);
1372
1373 size_t const cb = RT_MIN(pVirtqBuf->cbPhysSend, sizeof(VIRTIO_SCSI_CTRL_UNION_T));
1374 for (size_t uOffset = 0; uOffset < cb; )
1375 {
1376 size_t cbSeg = cb - uOffset;
1377 RTGCPHYS GCPhys = virtioCoreGCPhysChainGetNextSeg(pVirtqBuf->pSgPhysSend, &cbSeg);
1378 PDMDevHlpPCIPhysReadMeta(pDevIns, GCPhys, &ScsiCtrlUnion.ab[uOffset], cbSeg);
1379 uOffset += cbSeg;
1380 }
1381
1382 AssertReturn( (ScsiCtrlUnion.Type.uType == VIRTIOSCSI_T_TMF
1383 && pVirtqBuf->cbPhysSend >= sizeof(VIRTIOSCSI_CTRL_TMF_T))
1384 || ( ( ScsiCtrlUnion.Type.uType == VIRTIOSCSI_T_AN_QUERY
1385 || ScsiCtrlUnion.Type.uType == VIRTIOSCSI_T_AN_SUBSCRIBE)
1386 && pVirtqBuf->cbPhysSend >= sizeof(VIRTIOSCSI_CTRL_AN_T)),
1387 0 /** @todo r=bird: what kind of status is '0' here? */);
1388
1389 union
1390 {
1391 uint32_t fSupportedEvents;
1392 } uData;
1393 uint8_t bResponse = VIRTIOSCSI_S_OK;
1394 uint8_t cSegs;
1395 RTSGSEG aReqSegs[2];
1396 switch (ScsiCtrlUnion.Type.uType)
1397 {
1398 case VIRTIOSCSI_T_TMF: /* Task Management Functions */
1399 {
1400 uint8_t uTarget = ScsiCtrlUnion.Tmf.abScsiLun[1];
1401 uint32_t uScsiLun = RT_MAKE_U16(ScsiCtrlUnion.Tmf.abScsiLun[3], ScsiCtrlUnion.Tmf.abScsiLun[2]) & 0x3fff;
1402 Log2Func(("[%s] (Target: %d LUN: %d) Task Mgt Function: %s\n",
1403 VIRTQNAME(uVirtqNbr), uTarget, uScsiLun, virtioGetTMFTypeText(ScsiCtrlUnion.Tmf.uSubtype)));
1404
1405 if (uTarget >= pThis->cTargets || !pThisCC->paTargetInstances[uTarget].fPresent)
1406 bResponse = VIRTIOSCSI_S_BAD_TARGET;
1407 else
1408 if (uScsiLun != 0)
1409 bResponse = VIRTIOSCSI_S_INCORRECT_LUN;
1410 else
1411 switch (ScsiCtrlUnion.Tmf.uSubtype)
1412 {
1413 case VIRTIOSCSI_T_TMF_ABORT_TASK:
1414 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1415 break;
1416 case VIRTIOSCSI_T_TMF_ABORT_TASK_SET:
1417 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1418 break;
1419 case VIRTIOSCSI_T_TMF_CLEAR_ACA:
1420 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1421 break;
1422 case VIRTIOSCSI_T_TMF_CLEAR_TASK_SET:
1423 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1424 break;
1425 case VIRTIOSCSI_T_TMF_I_T_NEXUS_RESET:
1426 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1427 break;
1428 case VIRTIOSCSI_T_TMF_LOGICAL_UNIT_RESET:
1429 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED;
1430 break;
1431 case VIRTIOSCSI_T_TMF_QUERY_TASK:
1432 bResponse = VIRTIOSCSI_S_FUNCTION_REJECTED;
1433 break;
1434 case VIRTIOSCSI_T_TMF_QUERY_TASK_SET:
1435 bResponse = VIRTIOSCSI_S_FUNCTION_REJECTED;
1436 break;
1437 default:
1438 LogFunc(("Unknown TMF type\n"));
1439 bResponse = VIRTIOSCSI_S_FAILURE;
1440 }
1441 cSegs = 0; /* only bResponse */
1442 break;
1443 }
1444 case VIRTIOSCSI_T_AN_QUERY: /* Guest SCSI driver is querying supported async event notifications */
1445 {
1446 uint8_t uTarget = ScsiCtrlUnion.AsyncNotify.abScsiLun[1];
1447 uint32_t uScsiLun = RT_MAKE_U16(ScsiCtrlUnion.AsyncNotify.abScsiLun[3],
1448 ScsiCtrlUnion.AsyncNotify.abScsiLun[2]) & 0x3fff;
1449
1450 if (uTarget >= pThis->cTargets || !pThisCC->paTargetInstances[uTarget].fPresent)
1451 bResponse = VIRTIOSCSI_S_BAD_TARGET;
1452 else
1453 if (uScsiLun != 0)
1454 bResponse = VIRTIOSCSI_S_INCORRECT_LUN;
1455 else
1456 bResponse = VIRTIOSCSI_S_FUNCTION_COMPLETE;
1457
1458#ifdef LOG_ENABLED
1459 if (LogIs2Enabled())
1460 {
1461 char szTypeText[128];
1462 virtioGetControlAsyncMaskText(szTypeText, sizeof(szTypeText), ScsiCtrlUnion.AsyncNotify.fEventsRequested);
1463 Log2Func(("[%s] (Target: %d LUN: %d) Async. Notification Query: %s\n",
1464 VIRTQNAME(uVirtqNbr), uTarget, uScsiLun, szTypeText));
1465 }
1466#endif
1467 uData.fSupportedEvents = SUPPORTED_EVENTS;
1468 aReqSegs[0].pvSeg = &uData.fSupportedEvents;
1469 aReqSegs[0].cbSeg = sizeof(uData.fSupportedEvents);
1470 cSegs = 1;
1471 break;
1472 }
1473 case VIRTIOSCSI_T_AN_SUBSCRIBE: /* Guest SCSI driver is subscribing to async event notification(s) */
1474 {
1475 if (ScsiCtrlUnion.AsyncNotify.fEventsRequested & ~SUBSCRIBABLE_EVENTS)
1476 LogFunc(("Unsupported bits in event subscription event mask: %#x\n",
1477 ScsiCtrlUnion.AsyncNotify.fEventsRequested));
1478
1479 uint8_t uTarget = ScsiCtrlUnion.AsyncNotify.abScsiLun[1];
1480 uint32_t uScsiLun = RT_MAKE_U16(ScsiCtrlUnion.AsyncNotify.abScsiLun[3],
1481 ScsiCtrlUnion.AsyncNotify.abScsiLun[2]) & 0x3fff;
1482
1483#ifdef LOG_ENABLED
1484 if (LogIs2Enabled())
1485 {
1486 char szTypeText[128];
1487 virtioGetControlAsyncMaskText(szTypeText, sizeof(szTypeText), ScsiCtrlUnion.AsyncNotify.fEventsRequested);
1488 Log2Func(("[%s] (Target: %d LUN: %d) Async. Notification Subscribe: %s\n",
1489 VIRTQNAME(uVirtqNbr), uTarget, uScsiLun, szTypeText));
1490 }
1491#endif
1492 if (uTarget >= pThis->cTargets || !pThisCC->paTargetInstances[uTarget].fPresent)
1493 bResponse = VIRTIOSCSI_S_BAD_TARGET;
1494 else
1495 if (uScsiLun != 0)
1496 bResponse = VIRTIOSCSI_S_INCORRECT_LUN;
1497 else
1498 {
1499 bResponse = VIRTIOSCSI_S_FUNCTION_SUCCEEDED; /* or VIRTIOSCSI_S_FUNCTION_COMPLETE? */
1500 pThis->fAsyncEvtsEnabled = SUPPORTED_EVENTS & ScsiCtrlUnion.AsyncNotify.fEventsRequested;
1501 }
1502
1503 aReqSegs[0].pvSeg = &pThis->fAsyncEvtsEnabled;
1504 aReqSegs[0].cbSeg = sizeof(pThis->fAsyncEvtsEnabled);
1505 cSegs = 1;
1506 break;
1507 }
1508 default:
1509 {
1510 LogFunc(("Unknown control type extracted from %s: %u\n", VIRTQNAME(uVirtqNbr), ScsiCtrlUnion.Type.uType));
1511
1512 bResponse = VIRTIOSCSI_S_FAILURE;
1513 cSegs = 0; /* only bResponse */
1514 break;
1515 }
1516 }
1517
1518 /* Add the response code: */
1519 aReqSegs[cSegs].pvSeg = &bResponse;
1520 aReqSegs[cSegs].cbSeg = sizeof(bResponse);
1521 cSegs++;
1522 Assert(cSegs <= RT_ELEMENTS(aReqSegs));
1523
1524 LogFunc(("Response code: %s\n", virtioGetReqRespText(bResponse)));
1525
1526 RTSGBUF ReqSgBuf;
1527 RTSgBufInit(&ReqSgBuf, aReqSegs, cSegs);
1528
1529 virtioCoreR3VirtqUsedBufPut(pDevIns, &pThis->Virtio, uVirtqNbr, &ReqSgBuf, pVirtqBuf, true /*fFence*/);
1530 virtioCoreVirtqUsedRingSync(pDevIns, &pThis->Virtio, uVirtqNbr);
1531
1532 return VINF_SUCCESS;
1533}
1534
1535/**
1536 * @callback_method_impl{FNPDMTHREADWAKEUPDEV}
1537 */
1538static DECLCALLBACK(int) virtioScsiR3WorkerWakeUp(PPDMDEVINS pDevIns, PPDMTHREAD pThread)
1539{
1540 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
1541 return PDMDevHlpSUPSemEventSignal(pDevIns, pThis->aWorkers[(uintptr_t)pThread->pvUser].hEvtProcess);
1542}
1543
1544/**
1545 * @callback_method_impl{FNPDMTHREADDEV}
1546 */
1547static DECLCALLBACK(int) virtioScsiR3WorkerThread(PPDMDEVINS pDevIns, PPDMTHREAD pThread)
1548{
1549 uint16_t const uVirtqNbr = (uint16_t)(uintptr_t)pThread->pvUser;
1550 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
1551 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
1552 PVIRTIOSCSIWORKER pWorker = &pThis->aWorkers[uVirtqNbr];
1553 PVIRTIOSCSIWORKERR3 pWorkerR3 = &pThisCC->aWorkers[uVirtqNbr];
1554
1555 if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
1556 return VINF_SUCCESS;
1557
1558 while (pThread->enmState == PDMTHREADSTATE_RUNNING)
1559 {
1560 if (!pWorkerR3->cRedoDescs && IS_VIRTQ_EMPTY(pDevIns, &pThis->Virtio, uVirtqNbr))
1561 {
1562 /* Atomic interlocks avoid missing alarm while going to sleep & notifier waking the awoken */
1563 ASMAtomicWriteBool(&pWorker->fSleeping, true);
1564 bool fNotificationSent = ASMAtomicXchgBool(&pWorker->fNotified, false);
1565 if (!fNotificationSent)
1566 {
1567 Log6Func(("%s worker sleeping...\n", VIRTQNAME(uVirtqNbr)));
1568 Assert(ASMAtomicReadBool(&pWorker->fSleeping));
1569 int rc = PDMDevHlpSUPSemEventWaitNoResume(pDevIns, pWorker->hEvtProcess, RT_INDEFINITE_WAIT);
1570 AssertLogRelMsgReturn(RT_SUCCESS(rc) || rc == VERR_INTERRUPTED, ("%Rrc\n", rc), rc);
1571 if (RT_UNLIKELY(pThread->enmState != PDMTHREADSTATE_RUNNING))
1572 return VINF_SUCCESS;
1573 if (rc == VERR_INTERRUPTED)
1574 continue;
1575 Log6Func(("%s worker woken\n", VIRTQNAME(uVirtqNbr)));
1576 ASMAtomicWriteBool(&pWorker->fNotified, false);
1577 }
1578 ASMAtomicWriteBool(&pWorker->fSleeping, false);
1579 }
1580
1581 if (!pThis->afVirtqAttached[uVirtqNbr])
1582 {
1583 LogFunc(("%s queue not attached, worker aborting...\n", VIRTQNAME(uVirtqNbr)));
1584 break;
1585 }
1586 if (!pThisCC->fQuiescing)
1587 {
1588 /* Process any reqs that were suspended saved to the redo queue in save exec. */
1589 for (int i = 0; i < pWorkerR3->cRedoDescs; i++)
1590 {
1591 PVIRTQBUF pVirtqBuf;
1592 int rc = virtioCoreR3VirtqAvailBufGet(pDevIns, &pThis->Virtio, uVirtqNbr,
1593 pWorkerR3->auRedoDescs[i], &pVirtqBuf);
1594 if (RT_FAILURE(rc))
1595 LogRel(("Error fetching desc chain to redo, %Rrc", rc));
1596
1597 rc = virtioScsiR3ReqSubmit(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf);
1598 if (RT_FAILURE(rc))
1599 LogRel(("Error submitting req packet, resetting %Rrc", rc));
1600
1601 virtioCoreR3VirtqBufRelease(&pThis->Virtio, pVirtqBuf);
1602 }
1603 pWorkerR3->cRedoDescs = 0;
1604
1605 Log6Func(("fetching next descriptor chain from %s\n", VIRTQNAME(uVirtqNbr)));
1606 PVIRTQBUF pVirtqBuf = NULL;
1607 int rc = virtioCoreR3VirtqAvailBufGet(pDevIns, &pThis->Virtio, uVirtqNbr, &pVirtqBuf, true);
1608 if (rc == VERR_NOT_AVAILABLE)
1609 {
1610 Log6Func(("Nothing found in %s\n", VIRTQNAME(uVirtqNbr)));
1611 continue;
1612 }
1613
1614 AssertRC(rc);
1615 if (uVirtqNbr == CONTROLQ_IDX)
1616 virtioScsiR3Ctrl(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf);
1617 else /* request queue index */
1618 {
1619 rc = virtioScsiR3ReqSubmit(pDevIns, pThis, pThisCC, uVirtqNbr, pVirtqBuf);
1620 if (RT_FAILURE(rc))
1621 LogRel(("Error submitting req packet, resetting %Rrc", rc));
1622 }
1623
1624 virtioCoreR3VirtqBufRelease(&pThis->Virtio, pVirtqBuf);
1625 }
1626 }
1627 return VINF_SUCCESS;
1628}
1629
1630
1631/*********************************************************************************************************************************
1632* Sending evnets
1633*********************************************************************************************************************************/
1634
1635/*
1636 * @todo Figure out how to implement this with R0 changes. Not used by current linux driver
1637 */
1638
1639#if 0
1640DECLINLINE(void) virtioScsiR3ReportEventsMissed(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget)
1641{
1642 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_NO_EVENT | VIRTIOSCSI_T_EVENTS_MISSED, 0);
1643}
1644#endif
1645
1646#if 0
1647/* SUBSCRIBABLE EVENT - not sure when to call this or how to detect when media is added or removed
1648 * via the VBox GUI */
1649DECLINLINE(void) virtioScsiR3ReportMediaChange(PPDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget)
1650{
1651 if (pThis->fAsyncEvtsEnabled & VIRTIOSCSI_EVT_ASYNC_MEDIA_CHANGE)
1652 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_ASYNC_NOTIFY, VIRTIOSCSI_EVT_ASYNC_MEDIA_CHANGE);
1653}
1654
1655/* ESSENTIAL (NON-SUBSCRIBABLE) EVENT TYPES (most guest virtio-scsi drivers ignore?) */
1656
1657DECLINLINE(void) virtioScsiR3ReportTransportReset(PDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget)
1658{
1659 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_TRANSPORT_RESET, VIRTIOSCSI_EVT_RESET_HARD);
1660}
1661
1662DECLINLINE(void) virtioScsiR3ReportParamChange(PDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget,
1663 uint32_t uSenseCode, uint32_t uSenseQualifier)
1664{
1665 uint32_t uReason = uSenseQualifier << 8 | uSenseCode;
1666 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_PARAM_CHANGE, uReason);
1667
1668}
1669
1670DECLINLINE(void) virtioScsiR3ReportTargetRemoved(PDMDEVINS pDevIns, PVIRTIOSCSI pThis, uint16_t uTarget)
1671{
1672 if (pThis->fHasHotplug)
1673 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_TRANSPORT_RESET, VIRTIOSCSI_EVT_RESET_REMOVED);
1674}
1675
1676DECLINLINE(void) virtioScsiR3ReportTargetAdded(PDMDEVINS pDevInsPVIRTIOSCSI pThis, uint16_t uTarget)
1677{
1678 if (pThis->fHasHotplug)
1679 virtioScsiR3SendEvent(pDevIns, pThis, uTarget, VIRTIOSCSI_T_TRANSPORT_RESET, VIRTIOSCSI_EVT_RESET_RESCAN);
1680}
1681
1682#endif
1683
1684/**
1685 * @callback_method_impl{VIRTIOCORER3,pfnStatusChanged}
1686 */
1687static DECLCALLBACK(void) virtioScsiR3StatusChanged(PVIRTIOCORE pVirtio, PVIRTIOCORECC pVirtioCC, uint32_t fVirtioReady)
1688{
1689 PVIRTIOSCSI pThis = RT_FROM_MEMBER(pVirtio, VIRTIOSCSI, Virtio);
1690 PVIRTIOSCSICC pThisCC = RT_FROM_MEMBER(pVirtioCC, VIRTIOSCSICC, Virtio);
1691
1692 pThis->fVirtioReady = fVirtioReady;
1693
1694 if (fVirtioReady)
1695 {
1696 LogFunc(("VirtIO ready\n-----------------------------------------------------------------------------------------\n"));
1697 uint64_t fFeatures = virtioCoreGetNegotiatedFeatures(&pThis->Virtio);
1698 pThis->fHasT10pi = fFeatures & VIRTIO_SCSI_F_T10_PI;
1699 pThis->fHasHotplug = fFeatures & VIRTIO_SCSI_F_HOTPLUG;
1700 pThis->fHasInOutBufs = fFeatures & VIRTIO_SCSI_F_INOUT;
1701 pThis->fHasLunChange = fFeatures & VIRTIO_SCSI_F_CHANGE;
1702 pThis->fResetting = false;
1703 pThisCC->fQuiescing = false;
1704
1705 for (unsigned i = 0; i < VIRTIOSCSI_VIRTQ_CNT; i++)
1706 pThis->afVirtqAttached[i] = true;
1707 }
1708 else
1709 {
1710 LogFunc(("VirtIO is resetting\n"));
1711 for (unsigned i = 0; i < VIRTIOSCSI_VIRTQ_CNT; i++)
1712 pThis->afVirtqAttached[i] = false;
1713
1714 /*
1715 * BIOS may change these values. When the OS comes up, and KVM driver accessed
1716 * through Windows, it assumes they are the default size. So as per the VirtIO 1.0 spec,
1717 * 5.6.4, these device configuration values must be set to default upon device reset.
1718 */
1719 pThis->virtioScsiConfig.uSenseSize = VIRTIOSCSI_SENSE_SIZE_DEFAULT;
1720 pThis->virtioScsiConfig.uCdbSize = VIRTIOSCSI_CDB_SIZE_DEFAULT;
1721 }
1722
1723
1724}
1725
1726
1727/*********************************************************************************************************************************
1728* LEDs *
1729*********************************************************************************************************************************/
1730
1731/**
1732 * @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed, Target level.}
1733 */
1734static DECLCALLBACK(int) virtioScsiR3TargetQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
1735{
1736 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, ILed);
1737 if (iLUN == 0)
1738 {
1739 *ppLed = &pTarget->led;
1740 Assert((*ppLed)->u32Magic == PDMLED_MAGIC);
1741 return VINF_SUCCESS;
1742 }
1743 return VERR_PDM_LUN_NOT_FOUND;
1744}
1745/**
1746 * @interface_method_impl{PDMILEDPORTS,pfnQueryStatusLed, Device level.}
1747 */
1748static DECLCALLBACK(int) virtioScsiR3DeviceQueryStatusLed(PPDMILEDPORTS pInterface, unsigned iLUN, PPDMLED *ppLed)
1749{
1750 PVIRTIOSCSICC pThisCC = RT_FROM_MEMBER(pInterface, VIRTIOSCSICC, ILeds);
1751 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pThisCC->pDevIns, PVIRTIOSCSI);
1752 if (iLUN < pThis->cTargets)
1753 {
1754 *ppLed = &pThisCC->paTargetInstances[iLUN].led;
1755 Assert((*ppLed)->u32Magic == PDMLED_MAGIC);
1756 return VINF_SUCCESS;
1757 }
1758 return VERR_PDM_LUN_NOT_FOUND;
1759}
1760
1761
1762/*********************************************************************************************************************************
1763* PDMIMEDIAPORT (target) *
1764*********************************************************************************************************************************/
1765
1766/**
1767 * @interface_method_impl{PDMIMEDIAPORT,pfnQueryDeviceLocation, Target level.}
1768 */
1769static DECLCALLBACK(int) virtioScsiR3QueryDeviceLocation(PPDMIMEDIAPORT pInterface, const char **ppcszController,
1770 uint32_t *piInstance, uint32_t *piLUN)
1771{
1772 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaPort);
1773 PPDMDEVINS pDevIns = pTarget->pDevIns;
1774
1775 AssertPtrReturn(ppcszController, VERR_INVALID_POINTER);
1776 AssertPtrReturn(piInstance, VERR_INVALID_POINTER);
1777 AssertPtrReturn(piLUN, VERR_INVALID_POINTER);
1778
1779 *ppcszController = pDevIns->pReg->szName;
1780 *piInstance = pDevIns->iInstance;
1781 *piLUN = pTarget->uTarget;
1782
1783 return VINF_SUCCESS;
1784}
1785
1786
1787/*********************************************************************************************************************************
1788* Virtio config. *
1789*********************************************************************************************************************************/
1790
1791/**
1792 * Worker for virtioScsiR3DevCapWrite and virtioScsiR3DevCapRead.
1793 */
1794static int virtioScsiR3CfgAccessed(PVIRTIOSCSI pThis, uint32_t uOffsetOfAccess, void *pv, uint32_t cb, bool fWrite)
1795{
1796 AssertReturn(pv && cb <= sizeof(uint32_t), fWrite ? VINF_SUCCESS : VINF_IOM_MMIO_UNUSED_00);
1797
1798 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uNumVirtqs, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1799 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uNumVirtqs, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1800 else
1801 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uSegMax, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1802 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uSegMax, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1803 else
1804 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uMaxSectors, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1805 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uMaxSectors, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1806 else
1807 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uCmdPerLun, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1808 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uCmdPerLun, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1809 else
1810 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uEventInfoSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1811 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uEventInfoSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1812 else
1813 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uSenseSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1814 VIRTIO_DEV_CONFIG_ACCESS( uSenseSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1815 else
1816 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uCdbSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1817 VIRTIO_DEV_CONFIG_ACCESS( uCdbSize, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1818 else
1819 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uMaxChannel, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1820 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uMaxChannel, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1821 else
1822 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uMaxTarget, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1823 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uMaxTarget, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1824 else
1825 if (VIRTIO_DEV_CONFIG_MATCH_MEMBER( uMaxLun, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess))
1826 VIRTIO_DEV_CONFIG_ACCESS_READONLY( uMaxLun, VIRTIOSCSI_CONFIG_T, uOffsetOfAccess, &pThis->virtioScsiConfig);
1827 else
1828 {
1829 LogFunc(("Bad access by guest to virtio_scsi_config: off=%u (%#x), cb=%u\n", uOffsetOfAccess, uOffsetOfAccess, cb));
1830 return fWrite ? VINF_SUCCESS : VINF_IOM_MMIO_UNUSED_00;
1831 }
1832 return VINF_SUCCESS;
1833}
1834
1835/**
1836 * @callback_method_impl{VIRTIOCORER3,pfnDevCapRead}
1837 */
1838static DECLCALLBACK(int) virtioScsiR3DevCapRead(PPDMDEVINS pDevIns, uint32_t uOffset, void *pv, uint32_t cb)
1839{
1840 return virtioScsiR3CfgAccessed(PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI), uOffset, pv, cb, false /*fRead*/);
1841}
1842
1843/**
1844 * @callback_method_impl{VIRTIOCORER3,pfnDevCapWrite}
1845 */
1846static DECLCALLBACK(int) virtioScsiR3DevCapWrite(PPDMDEVINS pDevIns, uint32_t uOffset, const void *pv, uint32_t cb)
1847{
1848 return virtioScsiR3CfgAccessed(PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI), uOffset, (void *)pv, cb, true /*fWrite*/);
1849}
1850
1851
1852/*********************************************************************************************************************************
1853* IBase for device and targets *
1854*********************************************************************************************************************************/
1855
1856/**
1857 * @interface_method_impl{PDMIBASE,pfnQueryInterface, Target level.}
1858 */
1859static DECLCALLBACK(void *) virtioScsiR3TargetQueryInterface(PPDMIBASE pInterface, const char *pszIID)
1860{
1861 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IBase);
1862 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pTarget->IBase);
1863 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAPORT, &pTarget->IMediaPort);
1864 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIMEDIAEXPORT, &pTarget->IMediaExPort);
1865 PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pTarget->ILed);
1866 return NULL;
1867}
1868
1869/**
1870 * @interface_method_impl{PDMIBASE,pfnQueryInterface, Device level.}
1871 */
1872static DECLCALLBACK(void *) virtioScsiR3DeviceQueryInterface(PPDMIBASE pInterface, const char *pszIID)
1873{
1874 PVIRTIOSCSICC pThisCC = RT_FROM_MEMBER(pInterface, VIRTIOSCSICC, IBase);
1875
1876 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pThisCC->IBase);
1877 PDMIBASE_RETURN_INTERFACE(pszIID, PDMILEDPORTS, &pThisCC->ILeds);
1878
1879 return NULL;
1880}
1881
1882
1883/*********************************************************************************************************************************
1884* Misc *
1885*********************************************************************************************************************************/
1886
1887/**
1888 * @callback_method_impl{FNDBGFHANDLERDEV, virtio-scsi debugger info callback.}
1889 */
1890static DECLCALLBACK(void) virtioScsiR3Info(PPDMDEVINS pDevIns, PCDBGFINFOHLP pHlp, const char *pszArgs)
1891{
1892 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
1893
1894 /* Parse arguments. */
1895 RT_NOREF(pszArgs); //bool fVerbose = pszArgs && strstr(pszArgs, "verbose") != NULL;
1896
1897 /* Show basic information. */
1898 pHlp->pfnPrintf(pHlp, "%s#%d: virtio-scsci ",
1899 pDevIns->pReg->szName,
1900 pDevIns->iInstance);
1901 pHlp->pfnPrintf(pHlp, "numTargets=%lu", pThis->cTargets);
1902}
1903
1904
1905/*********************************************************************************************************************************
1906* Saved state *
1907*********************************************************************************************************************************/
1908
1909/**
1910 * @callback_method_impl{FNSSMDEVLOADEXEC}
1911 */
1912static DECLCALLBACK(int) virtioScsiR3LoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
1913{
1914 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
1915 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
1916 PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
1917
1918 LogFunc(("LOAD EXEC!!\n"));
1919
1920 AssertReturn(uPass == SSM_PASS_FINAL, VERR_SSM_UNEXPECTED_PASS);
1921 AssertLogRelMsgReturn(uVersion == VIRTIOSCSI_SAVED_STATE_VERSION,
1922 ("uVersion=%u\n", uVersion), VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION);
1923
1924 virtioScsiSetVirtqNames(pThis);
1925 for (int uVirtqNbr = 0; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
1926 pHlp->pfnSSMGetBool(pSSM, &pThis->afVirtqAttached[uVirtqNbr]);
1927
1928 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uNumVirtqs);
1929 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uSegMax);
1930 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uMaxSectors);
1931 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uCmdPerLun);
1932 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uEventInfoSize);
1933 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uSenseSize);
1934 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uCdbSize);
1935 pHlp->pfnSSMGetU16(pSSM, &pThis->virtioScsiConfig.uMaxChannel);
1936 pHlp->pfnSSMGetU16(pSSM, &pThis->virtioScsiConfig.uMaxTarget);
1937 pHlp->pfnSSMGetU32(pSSM, &pThis->virtioScsiConfig.uMaxLun);
1938 pHlp->pfnSSMGetU32(pSSM, &pThis->fAsyncEvtsEnabled);
1939 pHlp->pfnSSMGetBool(pSSM, &pThis->fEventsMissed);
1940 pHlp->pfnSSMGetU32(pSSM, &pThis->fVirtioReady);
1941 pHlp->pfnSSMGetU32(pSSM, &pThis->fHasT10pi);
1942 pHlp->pfnSSMGetU32(pSSM, &pThis->fHasHotplug);
1943 pHlp->pfnSSMGetU32(pSSM, &pThis->fHasInOutBufs);
1944 pHlp->pfnSSMGetU32(pSSM, &pThis->fHasLunChange);
1945 pHlp->pfnSSMGetU32(pSSM, &pThis->fResetting);
1946
1947 uint32_t cTargets;
1948 int rc = pHlp->pfnSSMGetU32(pSSM, &cTargets);
1949 AssertRCReturn(rc, rc);
1950 AssertReturn(cTargets == pThis->cTargets,
1951 pHlp->pfnSSMSetLoadError(pSSM, VERR_SSM_LOAD_CONFIG_MISMATCH, RT_SRC_POS,
1952 N_("target count has changed: %u saved, %u configured now"),
1953 cTargets, pThis->cTargets));
1954
1955 for (uint16_t uTarget = 0; uTarget < pThis->cTargets; uTarget++)
1956 {
1957 uint16_t cReqsRedo;
1958 rc = pHlp->pfnSSMGetU16(pSSM, &cReqsRedo);
1959 AssertRCReturn(rc, rc);
1960 AssertReturn(cReqsRedo < VIRTQ_SIZE,
1961 pHlp->pfnSSMSetLoadError(pSSM, VERR_SSM_DATA_UNIT_FORMAT_CHANGED, RT_SRC_POS,
1962 N_("Bad count of I/O transactions to re-do in saved state (%#x, max %#x - 1)"),
1963 cReqsRedo, VIRTQ_SIZE));
1964
1965 for (uint16_t uVirtqNbr = VIRTQ_REQ_BASE; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
1966 {
1967 PVIRTIOSCSIWORKERR3 pWorkerR3 = &pThisCC->aWorkers[uVirtqNbr];
1968 pWorkerR3->cRedoDescs = 0;
1969 }
1970
1971 for (int i = 0; i < cReqsRedo; i++)
1972 {
1973 uint16_t uVirtqNbr;
1974 rc = pHlp->pfnSSMGetU16(pSSM, &uVirtqNbr);
1975 AssertRCReturn(rc, rc);
1976 AssertReturn(uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT,
1977 pHlp->pfnSSMSetLoadError(pSSM, VERR_SSM_DATA_UNIT_FORMAT_CHANGED, RT_SRC_POS,
1978 N_("Bad queue index for re-do in saved state (%#x, max %#x)"),
1979 uVirtqNbr, VIRTIOSCSI_VIRTQ_CNT - 1));
1980
1981 uint16_t idxHead;
1982 rc = pHlp->pfnSSMGetU16(pSSM, &idxHead);
1983 AssertRCReturn(rc, rc);
1984 AssertReturn(idxHead < VIRTQ_SIZE,
1985 pHlp->pfnSSMSetLoadError(pSSM, VERR_SSM_DATA_UNIT_FORMAT_CHANGED, RT_SRC_POS,
1986 N_("Bad queue element index for re-do in saved state (%#x, max %#x)"),
1987 idxHead, VIRTQ_SIZE - 1));
1988
1989 PVIRTIOSCSIWORKERR3 pWorkerR3 = &pThisCC->aWorkers[uVirtqNbr];
1990 pWorkerR3->auRedoDescs[pWorkerR3->cRedoDescs++] = idxHead;
1991 pWorkerR3->cRedoDescs %= VIRTQ_SIZE;
1992 }
1993 }
1994
1995 /*
1996 * Call the virtio core to let it load its state.
1997 */
1998 rc = virtioCoreR3LoadExec(&pThis->Virtio, pDevIns->pHlpR3, pSSM);
1999
2000 /*
2001 * Nudge request queue workers
2002 */
2003 for (int uVirtqNbr = VIRTQ_REQ_BASE; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
2004 {
2005 if (pThis->afVirtqAttached[uVirtqNbr])
2006 {
2007 LogFunc(("Waking %s worker.\n", VIRTQNAME(uVirtqNbr)));
2008 int rc2 = PDMDevHlpSUPSemEventSignal(pDevIns, pThis->aWorkers[uVirtqNbr].hEvtProcess);
2009 AssertRCReturn(rc, rc2);
2010 }
2011 }
2012
2013 return rc;
2014}
2015
2016/**
2017 * @callback_method_impl{FNSSMDEVSAVEEXEC}
2018 */
2019static DECLCALLBACK(int) virtioScsiR3SaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
2020{
2021 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2022 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2023 PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
2024
2025 LogFunc(("SAVE EXEC!!\n"));
2026
2027 for (int uVirtqNbr = 0; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
2028 pHlp->pfnSSMPutBool(pSSM, pThis->afVirtqAttached[uVirtqNbr]);
2029
2030 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uNumVirtqs);
2031 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uSegMax);
2032 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uMaxSectors);
2033 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uCmdPerLun);
2034 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uEventInfoSize);
2035 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uSenseSize);
2036 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uCdbSize);
2037 pHlp->pfnSSMPutU16(pSSM, pThis->virtioScsiConfig.uMaxChannel);
2038 pHlp->pfnSSMPutU16(pSSM, pThis->virtioScsiConfig.uMaxTarget);
2039 pHlp->pfnSSMPutU32(pSSM, pThis->virtioScsiConfig.uMaxLun);
2040 pHlp->pfnSSMPutU32(pSSM, pThis->fAsyncEvtsEnabled);
2041 pHlp->pfnSSMPutBool(pSSM, pThis->fEventsMissed);
2042 pHlp->pfnSSMPutU32(pSSM, pThis->fVirtioReady);
2043 pHlp->pfnSSMPutU32(pSSM, pThis->fHasT10pi);
2044 pHlp->pfnSSMPutU32(pSSM, pThis->fHasHotplug);
2045 pHlp->pfnSSMPutU32(pSSM, pThis->fHasInOutBufs);
2046 pHlp->pfnSSMPutU32(pSSM, pThis->fHasLunChange);
2047 pHlp->pfnSSMPutU32(pSSM, pThis->fResetting);
2048
2049 AssertMsg(!pThis->cActiveReqs, ("There are still outstanding requests on this device\n"));
2050
2051 pHlp->pfnSSMPutU32(pSSM, pThis->cTargets);
2052
2053 for (uint16_t uTarget = 0; uTarget < pThis->cTargets; uTarget++)
2054 {
2055 PVIRTIOSCSITARGET pTarget = &pThisCC->paTargetInstances[uTarget];
2056
2057 /* Query all suspended requests and store them in the request queue. */
2058 if (pTarget->pDrvMediaEx)
2059 {
2060 uint32_t cReqsRedo = pTarget->pDrvMediaEx->pfnIoReqGetSuspendedCount(pTarget->pDrvMediaEx);
2061
2062 pHlp->pfnSSMPutU16(pSSM, cReqsRedo);
2063
2064 if (cReqsRedo)
2065 {
2066 PDMMEDIAEXIOREQ hIoReq;
2067 PVIRTIOSCSIREQ pReq;
2068
2069 int rc = pTarget->pDrvMediaEx->pfnIoReqQuerySuspendedStart(pTarget->pDrvMediaEx, &hIoReq,
2070 (void **)&pReq);
2071 AssertRCBreak(rc);
2072
2073 while(--cReqsRedo)
2074 {
2075 pHlp->pfnSSMPutU16(pSSM, pReq->uVirtqNbr);
2076 pHlp->pfnSSMPutU16(pSSM, pReq->pVirtqBuf->uHeadIdx);
2077
2078 rc = pTarget->pDrvMediaEx->pfnIoReqQuerySuspendedNext(pTarget->pDrvMediaEx, hIoReq,
2079 &hIoReq, (void **)&pReq);
2080 AssertRCBreak(rc);
2081 }
2082 }
2083 }
2084 }
2085
2086 /*
2087 * Call the virtio core to let it save its state.
2088 */
2089 return virtioCoreR3SaveExec(&pThis->Virtio, pDevIns->pHlpR3, pSSM);
2090}
2091
2092
2093/*********************************************************************************************************************************
2094* Device interface. *
2095*********************************************************************************************************************************/
2096
2097/**
2098 * @interface_method_impl{PDMDEVREGR3,pfnDetach}
2099 *
2100 * One harddisk at one port has been unplugged.
2101 * The VM is suspended at this point.
2102 */
2103static DECLCALLBACK(void) virtioScsiR3Detach(PPDMDEVINS pDevIns, unsigned uTarget, uint32_t fFlags)
2104{
2105 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2106 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2107 AssertReturnVoid(uTarget < pThis->cTargets);
2108 PVIRTIOSCSITARGET pTarget = &pThisCC->paTargetInstances[uTarget];
2109
2110 LogFunc((""));
2111
2112 AssertMsg(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
2113 ("virtio-scsi: Device does not support hotplugging\n"));
2114 RT_NOREF(fFlags);
2115
2116 /*
2117 * Zero all important members.
2118 */
2119 pTarget->fPresent = false;
2120 pTarget->pDrvBase = NULL;
2121 pTarget->pDrvMedia = NULL;
2122 pTarget->pDrvMediaEx = NULL;
2123}
2124
2125/**
2126 * @interface_method_impl{PDMDEVREGR3,pfnAttach}
2127 *
2128 * This is called when we change block driver.
2129 */
2130static DECLCALLBACK(int) virtioScsiR3Attach(PPDMDEVINS pDevIns, unsigned uTarget, uint32_t fFlags)
2131{
2132 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2133 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2134 AssertReturn(uTarget < pThis->cTargets, VERR_PDM_LUN_NOT_FOUND);
2135 PVIRTIOSCSITARGET pTarget = &pThisCC->paTargetInstances[uTarget];
2136
2137 Assert(pTarget->pDevIns == pDevIns);
2138 AssertMsgReturn(fFlags & PDM_TACH_FLAGS_NOT_HOT_PLUG,
2139 ("virtio-scsi: Device does not support hotplugging\n"),
2140 VERR_INVALID_PARAMETER);
2141
2142 AssertRelease(!pTarget->pDrvBase);
2143 Assert(pTarget->uTarget == uTarget);
2144
2145 /*
2146 * Try attach the SCSI driver and get the interfaces, required as well as optional.
2147 */
2148 int rc = PDMDevHlpDriverAttach(pDevIns, pTarget->uTarget, &pDevIns->IBase, &pTarget->pDrvBase, pTarget->pszTargetName);
2149 if (RT_SUCCESS(rc))
2150 {
2151 pTarget->fPresent = true;
2152 pTarget->pDrvMedia = PDMIBASE_QUERY_INTERFACE(pTarget->pDrvBase, PDMIMEDIA);
2153 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMedia),
2154 ("virtio-scsi configuration error: LUN#%d missing basic media interface!\n", uTarget),
2155 VERR_PDM_MISSING_INTERFACE);
2156
2157 /* Get the extended media interface. */
2158 pTarget->pDrvMediaEx = PDMIBASE_QUERY_INTERFACE(pTarget->pDrvBase, PDMIMEDIAEX);
2159 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMediaEx),
2160 ("virtio-scsi configuration error: LUN#%d missing extended media interface!\n", uTarget),
2161 VERR_PDM_MISSING_INTERFACE);
2162
2163 rc = pTarget->pDrvMediaEx->pfnIoReqAllocSizeSet(pTarget->pDrvMediaEx, sizeof(VIRTIOSCSIREQ));
2164 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMediaEx),
2165 ("virtio-scsi configuration error: LUN#%u: Failed to set I/O request size!\n", uTarget),
2166 rc);
2167 }
2168 else
2169 AssertMsgFailed(("Failed to attach %s. rc=%Rrc\n", pTarget->pszTargetName, rc));
2170
2171 if (RT_FAILURE(rc))
2172 {
2173 pTarget->fPresent = false;
2174 pTarget->pDrvBase = NULL;
2175 pTarget->pDrvMedia = NULL;
2176 pTarget->pDrvMediaEx = NULL;
2177 pThisCC->pMediaNotify = NULL;
2178 }
2179 return rc;
2180}
2181
2182/**
2183 * @callback_method_impl{FNPDMDEVASYNCNOTIFY}
2184 */
2185static DECLCALLBACK(bool) virtioScsiR3DeviceQuiesced(PPDMDEVINS pDevIns)
2186{
2187 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2188 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2189
2190 if (ASMAtomicReadU32(&pThis->cActiveReqs))
2191 return false;
2192
2193 LogFunc(("Device I/O activity quiesced: %s\n",
2194 virtioCoreGetStateChangeText(pThisCC->enmQuiescingFor)));
2195
2196 virtioCoreR3VmStateChanged(&pThis->Virtio, pThisCC->enmQuiescingFor);
2197
2198 pThis->fResetting = false;
2199 pThisCC->fQuiescing = false;
2200
2201 return true;
2202}
2203
2204/**
2205 * Worker for virtioScsiR3Reset() and virtioScsiR3SuspendOrPowerOff().
2206 */
2207static void virtioScsiR3QuiesceDevice(PPDMDEVINS pDevIns, VIRTIOVMSTATECHANGED enmQuiscingFor)
2208{
2209 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2210 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2211
2212 /* Prevent worker threads from removing/processing elements from virtq's */
2213 pThisCC->fQuiescing = true;
2214 pThisCC->enmQuiescingFor = enmQuiscingFor;
2215
2216 PDMDevHlpSetAsyncNotification(pDevIns, virtioScsiR3DeviceQuiesced);
2217
2218 /* If already quiesced invoke async callback. */
2219 if (!ASMAtomicReadU32(&pThis->cActiveReqs))
2220 PDMDevHlpAsyncNotificationCompleted(pDevIns);
2221}
2222
2223/**
2224 * @interface_method_impl{PDMDEVREGR3,pfnReset}
2225 */
2226static DECLCALLBACK(void) virtioScsiR3Reset(PPDMDEVINS pDevIns)
2227{
2228 LogFunc(("\n"));
2229 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2230 pThis->fResetting = true;
2231 virtioScsiR3QuiesceDevice(pDevIns, kvirtIoVmStateChangedReset);
2232}
2233
2234/**
2235 * @interface_method_impl{PDMDEVREGR3,pfnPowerOff}
2236 */
2237static DECLCALLBACK(void) virtioScsiR3SuspendOrPowerOff(PPDMDEVINS pDevIns, VIRTIOVMSTATECHANGED enmType)
2238{
2239 LogFunc(("\n"));
2240
2241 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2242 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2243
2244 /* VM is halted, thus no new I/O being dumped into queues by the guest.
2245 * Workers have been flagged to stop pulling stuff already queued-up by the guest.
2246 * Now tell lower-level to to suspend reqs (for example, DrvVD suspends all reqs
2247 * on its wait queue, and we will get a callback as the state changes to
2248 * suspended (and later, resumed) for each).
2249 */
2250 for (uint32_t i = 0; i < pThis->cTargets; i++)
2251 {
2252 PVIRTIOSCSITARGET pTarget = &pThisCC->paTargetInstances[i];
2253 if (pTarget->pDrvMediaEx)
2254 pTarget->pDrvMediaEx->pfnNotifySuspend(pTarget->pDrvMediaEx);
2255 }
2256
2257 virtioScsiR3QuiesceDevice(pDevIns, enmType);
2258}
2259
2260/**
2261 * @interface_method_impl{PDMDEVREGR3,pfnSuspend}
2262 */
2263static DECLCALLBACK(void) virtioScsiR3PowerOff(PPDMDEVINS pDevIns)
2264{
2265 LogFunc(("\n"));
2266 virtioScsiR3SuspendOrPowerOff(pDevIns, kvirtIoVmStateChangedPowerOff);
2267}
2268
2269/**
2270 * @interface_method_impl{PDMDEVREGR3,pfnSuspend}
2271 */
2272static DECLCALLBACK(void) virtioScsiR3Suspend(PPDMDEVINS pDevIns)
2273{
2274 LogFunc(("\n"));
2275 virtioScsiR3SuspendOrPowerOff(pDevIns, kvirtIoVmStateChangedSuspend);
2276}
2277
2278/**
2279 * @interface_method_impl{PDMDEVREGR3,pfnResume}
2280 */
2281static DECLCALLBACK(void) virtioScsiR3Resume(PPDMDEVINS pDevIns)
2282{
2283 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2284 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2285 LogFunc(("\n"));
2286
2287 pThisCC->fQuiescing = false;
2288
2289 /* Wake worker threads flagged to skip pulling queue entries during quiesce
2290 * to ensure they re-check their queues. Active request queues may already
2291 * be awake due to new reqs coming in.
2292 */
2293 for (uint16_t uVirtqNbr = 0; uVirtqNbr < VIRTIOSCSI_REQ_VIRTQ_CNT; uVirtqNbr++)
2294 {
2295 if (ASMAtomicReadBool(&pThis->aWorkers[uVirtqNbr].fSleeping))
2296 {
2297 Log6Func(("waking %s worker.\n", VIRTQNAME(uVirtqNbr)));
2298 int rc = PDMDevHlpSUPSemEventSignal(pDevIns, pThis->aWorkers[uVirtqNbr].hEvtProcess);
2299 AssertRC(rc);
2300 }
2301 }
2302 /* Ensure guest is working the queues too. */
2303 virtioCoreR3VmStateChanged(&pThis->Virtio, kvirtIoVmStateChangedResume);
2304}
2305
2306/**
2307 * @interface_method_impl{PDMIMEDIAEXPORT,pfnMediumEjected}
2308 */
2309static DECLCALLBACK(void) virtioScsiR3MediumEjected(PPDMIMEDIAEXPORT pInterface)
2310{
2311 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaExPort);
2312 PPDMDEVINS pDevIns = pTarget->pDevIns;
2313 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2314
2315#if 0 /* need more info about how to use this event. The VirtIO 1.0 specification
2316 * lists several SCSI related event types but presumes the reader knows
2317 * how to use them without providing references. */
2318 virtioScsiR3ReportMediaChange(pDevIns, pThis, pTarget->uTarget);
2319#endif
2320
2321 if (pThisCC->pMediaNotify)
2322 {
2323 int rc = VMR3ReqCallNoWait(PDMDevHlpGetVM(pDevIns), VMCPUID_ANY,
2324 (PFNRT)pThisCC->pMediaNotify->pfnEjected, 2,
2325 pThisCC->pMediaNotify, pTarget->uTarget);
2326 AssertRC(rc);
2327 }
2328}
2329
2330/**
2331 * @interface_method_impl{PDMIMEDIAEXPORT,pfnIoReqStateChanged}
2332 */
2333static DECLCALLBACK(void) virtioScsiR3IoReqStateChanged(PPDMIMEDIAEXPORT pInterface, PDMMEDIAEXIOREQ hIoReq,
2334 void *pvIoReqAlloc, PDMMEDIAEXIOREQSTATE enmState)
2335{
2336 PVIRTIOSCSITARGET pTarget = RT_FROM_MEMBER(pInterface, VIRTIOSCSITARGET, IMediaExPort);
2337 PPDMDEVINS pDevIns = pTarget->pDevIns;
2338 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2339 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2340 RT_NOREF(hIoReq, pvIoReqAlloc);
2341
2342 switch (enmState)
2343 {
2344 case PDMMEDIAEXIOREQSTATE_SUSPENDED:
2345 {
2346 /* Stop considering this request active */
2347 if (!ASMAtomicDecU32(&pThis->cActiveReqs) && pThisCC->fQuiescing)
2348 PDMDevHlpAsyncNotificationCompleted(pDevIns);
2349 break;
2350 }
2351 case PDMMEDIAEXIOREQSTATE_ACTIVE:
2352 ASMAtomicIncU32(&pThis->cActiveReqs);
2353 break;
2354 default:
2355 AssertMsgFailed(("Invalid request state given %u\n", enmState));
2356 }
2357}
2358
2359/**
2360 * @interface_method_impl{PDMDEVREGR3,pfnDestruct}
2361 */
2362static DECLCALLBACK(int) virtioScsiR3Destruct(PPDMDEVINS pDevIns)
2363{
2364 PDMDEV_CHECK_VERSIONS_RETURN_QUIET(pDevIns);
2365 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2366 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2367
2368 RTMemFree(pThisCC->paTargetInstances);
2369 pThisCC->paTargetInstances = NULL;
2370 pThisCC->pMediaNotify = NULL;
2371
2372 for (unsigned uVirtqNbr = 0; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
2373 {
2374 PVIRTIOSCSIWORKER pWorker = &pThis->aWorkers[uVirtqNbr];
2375 if (pWorker->hEvtProcess != NIL_SUPSEMEVENT)
2376 {
2377 PDMDevHlpSUPSemEventClose(pDevIns, pWorker->hEvtProcess);
2378 pWorker->hEvtProcess = NIL_SUPSEMEVENT;
2379 }
2380
2381 if (pThisCC->aWorkers[uVirtqNbr].pThread)
2382 {
2383 /* Destroy the thread. */
2384 int rcThread;
2385 int rc = PDMDevHlpThreadDestroy(pDevIns, pThisCC->aWorkers[uVirtqNbr].pThread, &rcThread);
2386 if (RT_FAILURE(rc) || RT_FAILURE(rcThread))
2387 AssertMsgFailed(("%s Failed to destroythread rc=%Rrc rcThread=%Rrc\n",
2388 __FUNCTION__, rc, rcThread));
2389 pThisCC->aWorkers[uVirtqNbr].pThread = NULL;
2390 }
2391 }
2392
2393 virtioCoreR3Term(pDevIns, &pThis->Virtio, &pThisCC->Virtio);
2394 return VINF_SUCCESS;
2395}
2396
2397/**
2398 * @interface_method_impl{PDMDEVREGR3,pfnConstruct}
2399 */
2400static DECLCALLBACK(int) virtioScsiR3Construct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
2401{
2402 PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
2403 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2404 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2405 PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
2406
2407 /*
2408 * Quick initialization of the state data, making sure that the destructor always works.
2409 */
2410 pThisCC->pDevIns = pDevIns;
2411
2412 LogFunc(("PDM device instance: %d\n", iInstance));
2413 RTStrPrintf(pThis->szInstance, sizeof(pThis->szInstance), "VIRTIOSCSI%d", iInstance);
2414
2415 pThisCC->IBase.pfnQueryInterface = virtioScsiR3DeviceQueryInterface;
2416 pThisCC->ILeds.pfnQueryStatusLed = virtioScsiR3DeviceQueryStatusLed;
2417
2418 /*
2419 * Validate and read configuration.
2420 */
2421 PDMDEV_VALIDATE_CONFIG_RETURN(pDevIns, "NumTargets|Bootable", "");
2422
2423 int rc = pHlp->pfnCFGMQueryU32Def(pCfg, "NumTargets", &pThis->cTargets, 1);
2424 if (RT_FAILURE(rc))
2425 return PDMDEV_SET_ERROR(pDevIns, rc, N_("virtio-scsi configuration error: failed to read NumTargets as integer"));
2426 if (pThis->cTargets < 1 || pThis->cTargets > VIRTIOSCSI_MAX_TARGETS)
2427 return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
2428 N_("virtio-scsi configuration error: NumTargets=%u is out of range (1..%u)"),
2429 pThis->cTargets, VIRTIOSCSI_MAX_TARGETS);
2430
2431 rc = pHlp->pfnCFGMQueryBoolDef(pCfg, "Bootable", &pThis->fBootable, true);
2432 if (RT_FAILURE(rc))
2433 return PDMDEV_SET_ERROR(pDevIns, rc, N_("virtio-scsi configuration error: failed to read Bootable as boolean"));
2434
2435 LogRel(("%s: Targets=%u Bootable=%RTbool (unimplemented) R0Enabled=%RTbool RCEnabled=%RTbool\n",
2436 pThis->szInstance, pThis->cTargets, pThis->fBootable, pDevIns->fR0Enabled, pDevIns->fRCEnabled));
2437
2438
2439 /*
2440 * Do core virtio initialization.
2441 */
2442
2443 /* Configure virtio_scsi_config that transacts via VirtIO implementation's Dev. Specific Cap callbacks */
2444 pThis->virtioScsiConfig.uNumVirtqs = VIRTIOSCSI_REQ_VIRTQ_CNT;
2445 pThis->virtioScsiConfig.uSegMax = VIRTIOSCSI_MAX_SEG_COUNT;
2446 pThis->virtioScsiConfig.uMaxSectors = VIRTIOSCSI_MAX_SECTORS_HINT;
2447 pThis->virtioScsiConfig.uCmdPerLun = VIRTIOSCSI_MAX_COMMANDS_PER_LUN;
2448 pThis->virtioScsiConfig.uEventInfoSize = sizeof(VIRTIOSCSI_EVENT_T); /*VirtIO 1.0 Spec says at least this size! */
2449 pThis->virtioScsiConfig.uSenseSize = VIRTIOSCSI_SENSE_SIZE_DEFAULT;
2450 pThis->virtioScsiConfig.uCdbSize = VIRTIOSCSI_CDB_SIZE_DEFAULT;
2451 pThis->virtioScsiConfig.uMaxChannel = VIRTIOSCSI_MAX_CHANNEL_HINT;
2452 pThis->virtioScsiConfig.uMaxTarget = pThis->cTargets;
2453 pThis->virtioScsiConfig.uMaxLun = VIRTIOSCSI_MAX_LUN;
2454
2455 /* Initialize the generic Virtio core: */
2456 pThisCC->Virtio.pfnVirtqNotified = virtioScsiNotified;
2457 pThisCC->Virtio.pfnStatusChanged = virtioScsiR3StatusChanged;
2458 pThisCC->Virtio.pfnDevCapRead = virtioScsiR3DevCapRead;
2459 pThisCC->Virtio.pfnDevCapWrite = virtioScsiR3DevCapWrite;
2460
2461 VIRTIOPCIPARAMS VirtioPciParams;
2462 VirtioPciParams.uDeviceId = PCI_DEVICE_ID_VIRTIOSCSI_HOST;
2463 VirtioPciParams.uClassBase = PCI_CLASS_BASE_MASS_STORAGE;
2464 VirtioPciParams.uClassSub = PCI_CLASS_SUB_SCSI_STORAGE_CONTROLLER;
2465 VirtioPciParams.uClassProg = PCI_CLASS_PROG_UNSPECIFIED;
2466 VirtioPciParams.uSubsystemId = PCI_DEVICE_ID_VIRTIOSCSI_HOST; /* VirtIO 1.0 spec allows PCI Device ID here */
2467 VirtioPciParams.uInterruptLine = 0x00;
2468 VirtioPciParams.uInterruptPin = 0x01;
2469
2470 rc = virtioCoreR3Init(pDevIns, &pThis->Virtio, &pThisCC->Virtio, &VirtioPciParams, pThis->szInstance,
2471 VIRTIOSCSI_HOST_SCSI_FEATURES_OFFERED,
2472 &pThis->virtioScsiConfig /*pvDevSpecificCap*/, sizeof(pThis->virtioScsiConfig));
2473 if (RT_FAILURE(rc))
2474 return PDMDEV_SET_ERROR(pDevIns, rc, N_("virtio-scsi: failed to initialize VirtIO"));
2475
2476 /*
2477 * Initialize queues.
2478 */
2479
2480 virtioScsiSetVirtqNames(pThis);
2481
2482 /* Attach the queues and create worker threads for them: */
2483 for (uint16_t uVirtqNbr = 0; uVirtqNbr < VIRTIOSCSI_VIRTQ_CNT; uVirtqNbr++)
2484 {
2485 rc = virtioCoreR3VirtqAttach(&pThis->Virtio, uVirtqNbr, VIRTQNAME(uVirtqNbr));
2486 if (RT_FAILURE(rc))
2487 continue;
2488 if (uVirtqNbr == CONTROLQ_IDX || IS_REQ_VIRTQ(uVirtqNbr))
2489 {
2490 rc = PDMDevHlpThreadCreate(pDevIns, &pThisCC->aWorkers[uVirtqNbr].pThread,
2491 (void *)(uintptr_t)uVirtqNbr, virtioScsiR3WorkerThread,
2492 virtioScsiR3WorkerWakeUp, 0, RTTHREADTYPE_IO, VIRTQNAME(uVirtqNbr));
2493 if (rc != VINF_SUCCESS)
2494 {
2495 LogRel(("Error creating thread for Virtual Virtq %s: %Rrc\n", VIRTQNAME(uVirtqNbr), rc));
2496 return rc;
2497 }
2498
2499 rc = PDMDevHlpSUPSemEventCreate(pDevIns, &pThis->aWorkers[uVirtqNbr].hEvtProcess);
2500 if (RT_FAILURE(rc))
2501 return PDMDevHlpVMSetError(pDevIns, rc, RT_SRC_POS,
2502 N_("DevVirtioSCSI: Failed to create SUP event semaphore"));
2503 }
2504 pThis->afVirtqAttached[uVirtqNbr] = true;
2505 }
2506
2507 /*
2508 * Initialize per device instances (targets).
2509 */
2510 Log2Func(("Probing %d targets ...\n", pThis->cTargets));
2511
2512 pThisCC->paTargetInstances = (PVIRTIOSCSITARGET)RTMemAllocZ(sizeof(VIRTIOSCSITARGET) * pThis->cTargets);
2513 if (!pThisCC->paTargetInstances)
2514 return PDMDEV_SET_ERROR(pDevIns, rc, N_("Failed to allocate memory for target states"));
2515
2516 for (uint32_t uTarget = 0; uTarget < pThis->cTargets; uTarget++)
2517 {
2518 PVIRTIOSCSITARGET pTarget = &pThisCC->paTargetInstances[uTarget];
2519
2520 if (RTStrAPrintf(&pTarget->pszTargetName, "VSCSI%u", uTarget) < 0)
2521 AssertLogRelFailedReturn(VERR_NO_MEMORY);
2522
2523 /* Initialize static parts of the device. */
2524 pTarget->pDevIns = pDevIns;
2525 pTarget->uTarget = uTarget;
2526
2527 pTarget->IBase.pfnQueryInterface = virtioScsiR3TargetQueryInterface;
2528
2529 /* IMediaPort and IMediaExPort interfaces provide callbacks for VD media and downstream driver access */
2530 pTarget->IMediaPort.pfnQueryDeviceLocation = virtioScsiR3QueryDeviceLocation;
2531 pTarget->IMediaPort.pfnQueryScsiInqStrings = NULL;
2532 pTarget->IMediaExPort.pfnIoReqCompleteNotify = virtioScsiR3IoReqFinish;
2533 pTarget->IMediaExPort.pfnIoReqCopyFromBuf = virtioScsiR3IoReqCopyFromBuf;
2534 pTarget->IMediaExPort.pfnIoReqCopyToBuf = virtioScsiR3IoReqCopyToBuf;
2535 pTarget->IMediaExPort.pfnIoReqStateChanged = virtioScsiR3IoReqStateChanged;
2536 pTarget->IMediaExPort.pfnMediumEjected = virtioScsiR3MediumEjected;
2537 pTarget->IMediaExPort.pfnIoReqQueryBuf = NULL; /* When used avoids copyFromBuf CopyToBuf*/
2538 pTarget->IMediaExPort.pfnIoReqQueryDiscardRanges = NULL;
2539
2540 pTarget->IBase.pfnQueryInterface = virtioScsiR3TargetQueryInterface;
2541 pTarget->ILed.pfnQueryStatusLed = virtioScsiR3TargetQueryStatusLed;
2542 pTarget->led.u32Magic = PDMLED_MAGIC;
2543
2544 LogFunc(("Attaching LUN: %s\n", pTarget->pszTargetName));
2545
2546 AssertReturn(uTarget < pThis->cTargets, VERR_PDM_NO_SUCH_LUN);
2547 rc = PDMDevHlpDriverAttach(pDevIns, uTarget, &pTarget->IBase, &pTarget->pDrvBase, pTarget->pszTargetName);
2548 if (RT_SUCCESS(rc))
2549 {
2550 pTarget->fPresent = true;
2551
2552 pTarget->pDrvMedia = PDMIBASE_QUERY_INTERFACE(pTarget->pDrvBase, PDMIMEDIA);
2553 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMedia),
2554 ("virtio-scsi configuration error: LUN#%d missing basic media interface!\n", uTarget),
2555 VERR_PDM_MISSING_INTERFACE);
2556 /* Get the extended media interface. */
2557 pTarget->pDrvMediaEx = PDMIBASE_QUERY_INTERFACE(pTarget->pDrvBase, PDMIMEDIAEX);
2558 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMediaEx),
2559 ("virtio-scsi configuration error: LUN#%d missing extended media interface!\n", uTarget),
2560 VERR_PDM_MISSING_INTERFACE);
2561
2562 rc = pTarget->pDrvMediaEx->pfnIoReqAllocSizeSet(pTarget->pDrvMediaEx, sizeof(VIRTIOSCSIREQ));
2563 AssertMsgReturn(RT_VALID_PTR(pTarget->pDrvMediaEx),
2564 ("virtio-scsi configuration error: LUN#%u: Failed to set I/O request size!\n", uTarget),
2565 rc);
2566 }
2567 else if (rc == VERR_PDM_NO_ATTACHED_DRIVER)
2568 {
2569 pTarget->fPresent = false;
2570 pTarget->pDrvBase = NULL;
2571 Log(("virtio-scsi: no driver attached to device %s\n", pTarget->pszTargetName));
2572 rc = VINF_SUCCESS;
2573 }
2574 else
2575 {
2576 AssertLogRelMsgFailed(("virtio-scsi: Failed to attach %s: %Rrc\n", pTarget->pszTargetName, rc));
2577 return rc;
2578 }
2579 }
2580
2581 /*
2582 * Status driver (optional).
2583 */
2584 PPDMIBASE pUpBase = NULL;
2585 AssertCompile(PDM_STATUS_LUN >= VIRTIOSCSI_MAX_TARGETS);
2586 rc = PDMDevHlpDriverAttach(pDevIns, PDM_STATUS_LUN, &pThisCC->IBase, &pUpBase, "Status Port");
2587 if (RT_FAILURE(rc) && rc != VERR_PDM_NO_ATTACHED_DRIVER)
2588 return PDMDEV_SET_ERROR(pDevIns, rc, N_("Failed to attach the status LUN"));
2589 if (RT_SUCCESS(rc) && pUpBase)
2590 pThisCC->pMediaNotify = PDMIBASE_QUERY_INTERFACE(pUpBase, PDMIMEDIANOTIFY);
2591
2592
2593 /*
2594 * Register saved state.
2595 */
2596 rc = PDMDevHlpSSMRegister(pDevIns, VIRTIOSCSI_SAVED_STATE_VERSION, sizeof(*pThis),
2597 virtioScsiR3SaveExec, virtioScsiR3LoadExec);
2598 AssertRCReturn(rc, rc);
2599
2600 /*
2601 * Register the debugger info callback (ignore errors).
2602 */
2603 char szTmp[128];
2604 RTStrPrintf(szTmp, sizeof(szTmp), "%s%u", pDevIns->pReg->szName, pDevIns->iInstance);
2605 PDMDevHlpDBGFInfoRegister(pDevIns, szTmp, "virtio-scsi info", virtioScsiR3Info);
2606
2607 return rc;
2608}
2609
2610#else /* !IN_RING3 */
2611
2612/**
2613 * @callback_method_impl{PDMDEVREGR0,pfnConstruct}
2614 */
2615static DECLCALLBACK(int) virtioScsiRZConstruct(PPDMDEVINS pDevIns)
2616{
2617 PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
2618
2619 PVIRTIOSCSI pThis = PDMDEVINS_2_DATA(pDevIns, PVIRTIOSCSI);
2620 PVIRTIOSCSICC pThisCC = PDMDEVINS_2_DATA_CC(pDevIns, PVIRTIOSCSICC);
2621
2622
2623 pThisCC->Virtio.pfnVirtqNotified = virtioScsiNotified;
2624 return virtioCoreRZInit(pDevIns, &pThis->Virtio);
2625}
2626
2627#endif /* !IN_RING3 */
2628
2629
2630/**
2631 * The device registration structure.
2632 */
2633const PDMDEVREG g_DeviceVirtioSCSI =
2634{
2635 /* .u32Version = */ PDM_DEVREG_VERSION,
2636 /* .uReserved0 = */ 0,
2637 /* .szName = */ "virtio-scsi",
2638 /* .fFlags = */ PDM_DEVREG_FLAGS_DEFAULT_BITS | PDM_DEVREG_FLAGS_RZ | PDM_DEVREG_FLAGS_NEW_STYLE
2639 | PDM_DEVREG_FLAGS_FIRST_SUSPEND_NOTIFICATION
2640 | PDM_DEVREG_FLAGS_FIRST_POWEROFF_NOTIFICATION,
2641 /* .fClass = */ PDM_DEVREG_CLASS_STORAGE,
2642 /* .cMaxInstances = */ ~0U,
2643 /* .uSharedVersion = */ 42,
2644 /* .cbInstanceShared = */ sizeof(VIRTIOSCSI),
2645 /* .cbInstanceCC = */ sizeof(VIRTIOSCSICC),
2646 /* .cbInstanceRC = */ sizeof(VIRTIOSCSIRC),
2647 /* .cMaxPciDevices = */ 1,
2648 /* .cMaxMsixVectors = */ VBOX_MSIX_MAX_ENTRIES,
2649 /* .pszDescription = */ "Virtio Host SCSI.\n",
2650#if defined(IN_RING3)
2651 /* .pszRCMod = */ "VBoxDDRC.rc",
2652 /* .pszR0Mod = */ "VBoxDDR0.r0",
2653 /* .pfnConstruct = */ virtioScsiR3Construct,
2654 /* .pfnDestruct = */ virtioScsiR3Destruct,
2655 /* .pfnRelocate = */ NULL,
2656 /* .pfnMemSetup = */ NULL,
2657 /* .pfnPowerOn = */ NULL,
2658 /* .pfnReset = */ virtioScsiR3Reset,
2659 /* .pfnSuspend = */ virtioScsiR3Suspend,
2660 /* .pfnResume = */ virtioScsiR3Resume,
2661 /* .pfnAttach = */ virtioScsiR3Attach,
2662 /* .pfnDetach = */ virtioScsiR3Detach,
2663 /* .pfnQueryInterface = */ NULL,
2664 /* .pfnInitComplete = */ NULL,
2665 /* .pfnPowerOff = */ virtioScsiR3PowerOff,
2666 /* .pfnSoftReset = */ NULL,
2667 /* .pfnReserved0 = */ NULL,
2668 /* .pfnReserved1 = */ NULL,
2669 /* .pfnReserved2 = */ NULL,
2670 /* .pfnReserved3 = */ NULL,
2671 /* .pfnReserved4 = */ NULL,
2672 /* .pfnReserved5 = */ NULL,
2673 /* .pfnReserved6 = */ NULL,
2674 /* .pfnReserved7 = */ NULL,
2675#elif defined(IN_RING0)
2676 /* .pfnEarlyConstruct = */ NULL,
2677 /* .pfnConstruct = */ virtioScsiRZConstruct,
2678 /* .pfnDestruct = */ NULL,
2679 /* .pfnFinalDestruct = */ NULL,
2680 /* .pfnRequest = */ NULL,
2681 /* .pfnReserved0 = */ NULL,
2682 /* .pfnReserved1 = */ NULL,
2683 /* .pfnReserved2 = */ NULL,
2684 /* .pfnReserved3 = */ NULL,
2685 /* .pfnReserved4 = */ NULL,
2686 /* .pfnReserved5 = */ NULL,
2687 /* .pfnReserved6 = */ NULL,
2688 /* .pfnReserved7 = */ NULL,
2689#elif defined(IN_RC)
2690 /* .pfnConstruct = */ virtioScsiRZConstruct,
2691 /* .pfnReserved0 = */ NULL,
2692 /* .pfnReserved1 = */ NULL,
2693 /* .pfnReserved2 = */ NULL,
2694 /* .pfnReserved3 = */ NULL,
2695 /* .pfnReserved4 = */ NULL,
2696 /* .pfnReserved5 = */ NULL,
2697 /* .pfnReserved6 = */ NULL,
2698 /* .pfnReserved7 = */ NULL,
2699#else
2700# error "Not in IN_RING3, IN_RING0 or IN_RC!"
2701#endif
2702 /* .u32VersionEnd = */ PDM_DEVREG_VERSION
2703};
2704
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