| 1 | /* $Id: VBoxSCSI.h 82968 2020-02-04 10:35:17Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * VBox storage devices - Simple SCSI interface for BIOS access.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2020 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | */
|
|---|
| 17 |
|
|---|
| 18 | /** @page pg_drv_scsi Simple SCSI interface for BIOS access.
|
|---|
| 19 | *
|
|---|
| 20 | * This is a simple interface to access SCSI devices from the BIOS which is
|
|---|
| 21 | * shared between the BusLogic and the LsiLogic SCSI host adapters to simplify
|
|---|
| 22 | * the BIOS part.
|
|---|
| 23 | *
|
|---|
| 24 | * The first interface (if available) will be starting at port 0x430 and
|
|---|
| 25 | * each will occupy 4 ports. The ports are used as described below:
|
|---|
| 26 | *
|
|---|
| 27 | * +--------+--------+----------+
|
|---|
| 28 | * | Offset | Access | Purpose |
|
|---|
| 29 | * +--------+--------+----------+
|
|---|
| 30 | * | 0 | Write | Command |
|
|---|
| 31 | * +--------+--------+----------+
|
|---|
| 32 | * | 0 | Read | Status |
|
|---|
| 33 | * +--------+--------+----------+
|
|---|
| 34 | * | 1 | Write | Data in |
|
|---|
| 35 | * +--------+--------+----------+
|
|---|
| 36 | * | 1 | Read | Data out |
|
|---|
| 37 | * +--------+--------+----------+
|
|---|
| 38 | * | 2 | R/W | Detect |
|
|---|
| 39 | * +--------+--------+----------+
|
|---|
| 40 | * | 3 | Read | SCSI rc |
|
|---|
| 41 | * +--------+--------+----------+
|
|---|
| 42 | * | 3 | Write | Reset |
|
|---|
| 43 | * +--------+--------+----------+
|
|---|
| 44 | *
|
|---|
| 45 | * The register at port 0 receives the SCSI CDB issued from the driver when
|
|---|
| 46 | * writing to it but before writing the actual CDB the first write gives the
|
|---|
| 47 | * size of the CDB in bytes.
|
|---|
| 48 | *
|
|---|
| 49 | * Reading the port at offset 0 gives status information about the adapter. If
|
|---|
| 50 | * the busy bit is set the adapter is processing a previous issued request if it is
|
|---|
| 51 | * cleared the command finished and the adapter can process another request.
|
|---|
| 52 | * The driver has to poll this bit because the adapter will not assert an IRQ
|
|---|
| 53 | * for simplicity reasons.
|
|---|
| 54 | *
|
|---|
| 55 | * The register at offset 2 is to detect if a host adapter is available. If the
|
|---|
| 56 | * driver writes a value to this port and gets the same value after reading it
|
|---|
| 57 | * again the adapter is available.
|
|---|
| 58 | *
|
|---|
| 59 | * Any write to the register at offset 3 causes the interface to be reset. A
|
|---|
| 60 | * read returns the SCSI status code of the last operation.
|
|---|
| 61 | *
|
|---|
| 62 | * This part has no R0 or RC components.
|
|---|
| 63 | */
|
|---|
| 64 |
|
|---|
| 65 | #ifndef VBOX_INCLUDED_SRC_Storage_VBoxSCSI_h
|
|---|
| 66 | #define VBOX_INCLUDED_SRC_Storage_VBoxSCSI_h
|
|---|
| 67 | #ifndef RT_WITHOUT_PRAGMA_ONCE
|
|---|
| 68 | # pragma once
|
|---|
| 69 | #endif
|
|---|
| 70 |
|
|---|
| 71 | /*******************************************************************************
|
|---|
| 72 | * Header Files *
|
|---|
| 73 | *******************************************************************************/
|
|---|
| 74 | //#define DEBUG
|
|---|
| 75 | #include <iprt/semaphore.h>
|
|---|
| 76 | #include <VBox/vmm/pdmdev.h>
|
|---|
| 77 | #include <VBox/vmm/pdmstorageifs.h>
|
|---|
| 78 | #include <VBox/scsi.h>
|
|---|
| 79 |
|
|---|
| 80 | typedef enum VBOXSCSISTATE
|
|---|
| 81 | {
|
|---|
| 82 | VBOXSCSISTATE_NO_COMMAND = 0x00,
|
|---|
| 83 | VBOXSCSISTATE_READ_TXDIR = 0x01,
|
|---|
| 84 | VBOXSCSISTATE_READ_CDB_SIZE_BUFHI = 0x02,
|
|---|
| 85 | VBOXSCSISTATE_READ_BUFFER_SIZE_LSB = 0x03,
|
|---|
| 86 | VBOXSCSISTATE_READ_BUFFER_SIZE_MID = 0x04,
|
|---|
| 87 | VBOXSCSISTATE_READ_COMMAND = 0x05,
|
|---|
| 88 | VBOXSCSISTATE_COMMAND_READY = 0x06
|
|---|
| 89 | } VBOXSCSISTATE;
|
|---|
| 90 |
|
|---|
| 91 | #define VBOXSCSI_TXDIR_FROM_DEVICE 0
|
|---|
| 92 | #define VBOXSCSI_TXDIR_TO_DEVICE 1
|
|---|
| 93 |
|
|---|
| 94 | /** Maximum CDB size the BIOS driver sends. */
|
|---|
| 95 | #define VBOXSCSI_CDB_SIZE_MAX 16
|
|---|
| 96 |
|
|---|
| 97 | typedef struct VBOXSCSI
|
|---|
| 98 | {
|
|---|
| 99 | /** The identify register. */
|
|---|
| 100 | uint8_t regIdentify;
|
|---|
| 101 | /** The target device. */
|
|---|
| 102 | uint8_t uTargetDevice;
|
|---|
| 103 | /** Transfer direction. */
|
|---|
| 104 | uint8_t uTxDir;
|
|---|
| 105 | /** The size of the CDB we are issuing. */
|
|---|
| 106 | uint8_t cbCDB;
|
|---|
| 107 | /** The command to issue. */
|
|---|
| 108 | uint8_t abCDB[VBOXSCSI_CDB_SIZE_MAX + 4];
|
|---|
| 109 | /** Current position in the array. */
|
|---|
| 110 | uint8_t iCDB;
|
|---|
| 111 |
|
|---|
| 112 | #if HC_ARCH_BITS == 64
|
|---|
| 113 | uint32_t Alignment0;
|
|---|
| 114 | #endif
|
|---|
| 115 |
|
|---|
| 116 | /** Pointer to the buffer holding the data. */
|
|---|
| 117 | R3PTRTYPE(uint8_t *) pbBuf;
|
|---|
| 118 | /** Size of the buffer in bytes. */
|
|---|
| 119 | uint32_t cbBuf;
|
|---|
| 120 | /** The number of bytes left to read/write in the
|
|---|
| 121 | * buffer. It is decremented when the guest (BIOS) accesses
|
|---|
| 122 | * the buffer data. */
|
|---|
| 123 | uint32_t cbBufLeft;
|
|---|
| 124 | /** Current position in the buffer (offBuf if you like). */
|
|---|
| 125 | uint32_t iBuf;
|
|---|
| 126 | /** The result code of last operation. */
|
|---|
| 127 | int32_t rcCompletion;
|
|---|
| 128 | /** Flag whether a request is pending. */
|
|---|
| 129 | volatile bool fBusy;
|
|---|
| 130 | /** The state we are in when fetching a command from the BIOS. */
|
|---|
| 131 | VBOXSCSISTATE enmState;
|
|---|
| 132 | /** Critical section protecting the device state. */
|
|---|
| 133 | RTCRITSECT CritSect;
|
|---|
| 134 | } VBOXSCSI, *PVBOXSCSI;
|
|---|
| 135 |
|
|---|
| 136 | #define VBOX_SCSI_BUSY RT_BIT(0)
|
|---|
| 137 | #define VBOX_SCSI_ERROR RT_BIT(1)
|
|---|
| 138 |
|
|---|
| 139 | #ifdef IN_RING3
|
|---|
| 140 | RT_C_DECLS_BEGIN
|
|---|
| 141 | int vboxscsiInitialize(PVBOXSCSI pVBoxSCSI);
|
|---|
| 142 | void vboxscsiDestroy(PVBOXSCSI pVBoxSCSI);
|
|---|
| 143 | void vboxscsiHwReset(PVBOXSCSI pVBoxSCSI);
|
|---|
| 144 | int vboxscsiReadRegister(PVBOXSCSI pVBoxSCSI, uint8_t iRegister, uint32_t *pu32Value);
|
|---|
| 145 | int vboxscsiWriteRegister(PVBOXSCSI pVBoxSCSI, uint8_t iRegister, uint8_t uVal);
|
|---|
| 146 | int vboxscsiSetupRequest(PVBOXSCSI pVBoxSCSI, uint32_t *puLun, uint8_t **ppbCdb, size_t *pcbCdb,
|
|---|
| 147 | size_t *pcbBuf, uint32_t *puTargetDevice);
|
|---|
| 148 | int vboxscsiRequestFinished(PVBOXSCSI pVBoxSCSI, int rcCompletion);
|
|---|
| 149 | size_t vboxscsiCopyToBuf(PVBOXSCSI pVBoxSCSI, PRTSGBUF pSgBuf, size_t cbSkip, size_t cbCopy);
|
|---|
| 150 | size_t vboxscsiCopyFromBuf(PVBOXSCSI pVBoxSCSI, PRTSGBUF pSgBuf, size_t cbSkip, size_t cbCopy);
|
|---|
| 151 | void vboxscsiSetRequestRedo(PVBOXSCSI pVBoxSCSI);
|
|---|
| 152 | int vboxscsiWriteString(PPDMDEVINS pDevIns, PVBOXSCSI pVBoxSCSI, uint8_t iRegister,
|
|---|
| 153 | uint8_t const *pbSrc, uint32_t *pcTransfers, unsigned cb);
|
|---|
| 154 | int vboxscsiReadString(PPDMDEVINS pDevIns, PVBOXSCSI pVBoxSCSI, uint8_t iRegister,
|
|---|
| 155 | uint8_t *pbDst, uint32_t *pcTransfers, unsigned cb);
|
|---|
| 156 |
|
|---|
| 157 | DECLHIDDEN(int) vboxscsiR3LoadExec(PCPDMDEVHLPR3 pHlp, PVBOXSCSI pVBoxSCSI, PSSMHANDLE pSSM);
|
|---|
| 158 | DECLHIDDEN(int) vboxscsiR3SaveExec(PCPDMDEVHLPR3 pHlp, PVBOXSCSI pVBoxSCSI, PSSMHANDLE pSSM);
|
|---|
| 159 | RT_C_DECLS_END
|
|---|
| 160 | #endif /* IN_RING3 */
|
|---|
| 161 |
|
|---|
| 162 | #endif /* !VBOX_INCLUDED_SRC_Storage_VBoxSCSI_h */
|
|---|
| 163 |
|
|---|
