138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
/*
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* CiderPress
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* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
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* See the file LICENSE for distribution terms.
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*/
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/*
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* Implementation of some SPTI functions.
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*/
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#include "StdAfx.h"
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#ifdef _WIN32
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#include "DiskImgPriv.h"
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#include "SCSIDefs.h"
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#include "CP_ntddscsi.h"
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#include "SPTI.h"
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/*
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* Get the capacity of the device.
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*
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* Returns the LBA of the last valid block and the device's block size.
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*/
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/*static*/ DIError SPTI::GetDeviceCapacity(HANDLE handle, uint32_t* pLastBlock,
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uint32_t* pBlockSize)
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{
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SCSI_PASS_THROUGH_DIRECT sptd;
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uint32_t lba, blockLen;
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CDB_ReadCapacityData dataBuf;
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DWORD cb;
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BOOL status;
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assert(sizeof(dataBuf) == 8); // READ CAPACITY returns two longs
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memset(&sptd, 0, sizeof(sptd));
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sptd.Length = sizeof(sptd);
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sptd.PathId = 0; // SCSI card ID filled in by ioctl
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sptd.TargetId = 0; // SCSI target ID filled in by ioctl
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sptd.Lun = 0; // SCSI lun ID filled in by ioctl
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sptd.CdbLength = 10; // CDB size is 10 for READ CAPACITY
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sptd.SenseInfoLength = 0; // don't return any sense data
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sptd.DataIn = SCSI_IOCTL_DATA_IN; // will be data from drive
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sptd.DataTransferLength = sizeof(dataBuf);
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sptd.TimeOutValue = 10; // SCSI timeout value, in seconds
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sptd.DataBuffer = (PVOID) &dataBuf;
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sptd.SenseInfoOffset = 0; // offset to request-sense buffer
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CDB10* pCdb = (CDB10*) &sptd.Cdb;
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pCdb->operationCode = kScsiOpReadCapacity;
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// rest of CDB is zero
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status = ::DeviceIoControl(handle, IOCTL_SCSI_PASS_THROUGH_DIRECT,
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&sptd, sizeof(sptd), NULL, 0, &cb, NULL);
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if (!status) {
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DWORD lastError = ::GetLastError();
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LOGE("DeviceIoControl(SCSI READ CAPACITY) failed, err=%ld",
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::GetLastError());
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if (lastError == ERROR_IO_DEVICE) // no disc in drive
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return kDIErrDeviceNotReady;
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else
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return kDIErrSPTIFailure;
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}
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lba = (uint32_t) dataBuf.logicalBlockAddr0 << 24 |
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(uint32_t) dataBuf.logicalBlockAddr1 << 16 |
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(uint32_t) dataBuf.logicalBlockAddr2 << 8 |
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(uint32_t) dataBuf.logicalBlockAddr3;
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blockLen = (uint32_t) dataBuf.bytesPerBlock0 << 24 |
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(uint32_t) dataBuf.bytesPerBlock1 << 16 |
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(uint32_t) dataBuf.bytesPerBlock2 << 8 |
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(uint32_t) dataBuf.bytesPerBlock3;
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*pLastBlock = lba;
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*pBlockSize = blockLen;
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return kDIErrNone;
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}
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/*
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* Read one or more blocks from the specified SCSI device.
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*
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* "buf" must be able to hold (numBlocks * blockSize) bytes.
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*/
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/*static*/ DIError SPTI::ReadBlocks(HANDLE handle, long startBlock,
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short numBlocks, long blockSize, void* buf)
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{
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SCSI_PASS_THROUGH_DIRECT sptd;
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DWORD cb;
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BOOL status;
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assert(startBlock >= 0);
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assert(numBlocks > 0);
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assert(buf != NULL);
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LOGD(" SPTI phys read block (%ld) %d", startBlock, numBlocks);
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memset(&sptd, 0, sizeof(sptd));
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sptd.Length = sizeof(sptd); // size of struct (+ request-sense buffer)
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sptd.ScsiStatus = 0;
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sptd.PathId = 0; // SCSI card ID filled in by ioctl
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sptd.TargetId = 0; // SCSI target ID filled in by ioctl
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sptd.Lun = 0; // SCSI lun ID filled in by ioctl
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sptd.CdbLength = 10; // CDB size is 10 for READ CAPACITY
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sptd.SenseInfoLength = 0; // don't return any sense data
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sptd.DataIn = SCSI_IOCTL_DATA_IN; // will be data from drive
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sptd.DataTransferLength = blockSize * numBlocks;
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sptd.TimeOutValue = 10; // SCSI timeout value (in seconds)
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sptd.DataBuffer = (PVOID) buf;
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sptd.SenseInfoOffset = 0; // offset from start of struct to request-sense
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CDB10* pCdb = (CDB10*) &sptd.Cdb;
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pCdb->operationCode = kScsiOpRead;
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pCdb->logicalBlockAddr0 = (uint8_t) (startBlock >> 24); // MSB
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pCdb->logicalBlockAddr1 = (uint8_t) (startBlock >> 16);
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pCdb->logicalBlockAddr2 = (uint8_t) (startBlock >> 8);
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pCdb->logicalBlockAddr3 = (uint8_t) startBlock; // LSB
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pCdb->transferLength0 = (uint8_t) (numBlocks >> 8); // MSB
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pCdb->transferLength1 = (uint8_t) numBlocks; // LSB
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status = ::DeviceIoControl(handle, IOCTL_SCSI_PASS_THROUGH_DIRECT,
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&sptd, sizeof(sptd), NULL, 0, &cb, NULL);
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if (!status) {
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LOGE("DeviceIoControl(SCSI READ(10)) failed, err=%ld",
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::GetLastError());
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return kDIErrReadFailed; // close enough
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}
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if (sptd.ScsiStatus != 0) {
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LOGE("SCSI READ(10) failed, status=%d", sptd.ScsiStatus);
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return kDIErrReadFailed;
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}
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return kDIErrNone;
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}
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#endif /*_WIN32*/
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