ATA_PASS_THROUGH_DIRECT有时会返回998（0x3E6）错误。 [英] ATA_PASS_THROUGH_DIRECT sometimes returned 998 (0x3E6) error.

问题描述

您好先生

我正在使用ATA_PASS_THROUGH_DIRECT将具有特定数据的供应商命令传输到我们的产品。

我做了缓冲区对齐。

如果缓冲区大小超过4KB，DeviceIoControl有时会返回错误代码998（0x3E6）。
但它偶尔会起作用。这对我来说真的很困扰。

附上代码供你参考。

#define ALIGNED_ADDR（base，AlignUnit）    （PVOID）（（（int）的（碱）+（AlignUnit））及 - （（AlignUnit） - 1））的#define
&ALIGN_UNIT NBSP;     0x10的

的SendData（HANDLE手柄，INT驱动，BYTE *数据，整数数据尺寸，IDE_REGS REGS，BYTE LBA_Mode）
{
    int size;
    DWORD bytrv = 0;
    IDE_REGS * pCurrentTask;
    BYTE * DataBuffer;
    ATA_PASS_THROUGH_DIRECT PassThroughDirect;

    memset（& PassThroughDirect，0，sizeof（ATA_PASS_THROUGH_DIRECT））;

    //使数据缓冲区与CACHE对齐，遵循MSDN要求
    DataBuffer =（BYTE *）malloc（DataSize + ALIGN_UNIT）;
    memset（DataBuffer，0，DataSize）;

    PassThroughDirect.DataBuffer = ALIGNED_ADDR（DataBuffer，ALIGN_UNIT）;
    memcpy（PassThroughDirect.DataBuffer，data，DataSize）;

    PassThroughDirect.ReservedAsUchar = 0;
    PassThroughDirect.ReservedAsUlong = 0;
    PassThroughDirect.AtaFlags =（USHORT）（ATA_FLAGS_DATA_OUT | ATA_FLAGS_USE_DMA | ATA_FLAGS_DRDY_REQUIRED）;
    PassThroughDirect.TimeOutValue = 10;

    PassThroughDirect.Length = sizeof（PassThroughDirect）;
    PassThroughDirect.DataTransferLength = DataSize;

    size =（int）PassThroughDirect.Length +（int）PassThroughDirect.DataTransferLength;

    pCurrentTask =（IDE_REGS *）& PassThroughDirect.CurrentTaskFile [0];

    pCurrentTask-> bfeaturesreg = Regs.bfeaturesreg;
    pCurrentTask-> bsectornumberreg = Regs.bsectornumberreg;
    pCurrentTask-> bsectorcountreg =（BYTE）（（数据尺寸+ SECTOR_SIZE - 1）/ SECTOR_SIZE）;
&NBSP;&NBSP;&NBSP; pCurrentTask-> bdriveheadreg =（BYTE）（0XA0 |（（驱动器&安培; 1） - ;< 4）|（LBA_Mode<&10 6））;
&NBSP;&NBSP;&NBSP; pCurrentTask-> bcylhighreg = Regs.bcylhighreg;
    pCurrentTask-> bcyllowreg = Regs.bcyllowreg;
    pCurrentTask-> bcommandreg = Regs.bcommandreg;

   如果（0 = DeviceIoControl的（手柄，IOCTL_ATA_PASS_THROUGH_DIRECT，
&NBSP;！&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&安培; PassThroughDirect，大小，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ; & PassThroughDirect，尺寸和& bytrv，0））    {
    &NBSP;&NBSP;&NBSP; //等待数据传输完成
    &NBSP;&NBSP;&NBSP; //甚至我们使用非重叠功能
    &NBSP;&NBSP;&NBSP; //如果我们发布资源并返回，有时仍会失败
    &NBSP;&NBSP;&NBSP; //在DeviceIoControl返回后立即发送    &NBSP;&NBSP;&NBSP;睡眠（1000）;

    &NBSP;&NBSP;&NBSP;免费（DataBuffer）;

    &NBSP;&NBSP;&NBSP; if（pCurrentTask-> bcommandreg == 0x00）
    &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;返回FALSE;
    &NBSP;&NBSP;&NBSP; if（pCurrentTask-> bcommandreg& 0x01）
    &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;返回FALSE;
       返回TRUE;
    }

   免费（DataBuffer）;
   返回FALSE;
问候，
吉姆

Hi sir

I am using ATA_PASS_THROUGH_DIRECT to transfer a vendor command with specific data to our product.

I had done buffer alignment.

DeviceIoControl sometimes returns Error code 998 (0x3E6) if the buffer size is more than 4KB.
But it does work good occasionally. This really bothered me for a long while.

Append the code for your reference.

#define ALIGNED_ADDR(base, AlignUnit)    (PVOID)(((int)(base) + (AlignUnit)) & ~((AlignUnit) - 1))
#define ALIGN_UNIT      0x10

SendData(HANDLE handle, int drive, BYTE * data, int DataSize, IDE_REGS Regs, BYTE LBA_Mode)
{
    int size;
    DWORD bytrv = 0;
    IDE_REGS * pCurrentTask ;
    BYTE * DataBuffer ;
    ATA_PASS_THROUGH_DIRECT PassThroughDirect ;

    memset(&PassThroughDirect, 0, sizeof(ATA_PASS_THROUGH_DIRECT)) ;

    // Make data buffer to be CACHE-aligned, follow MSDN requirement
    DataBuffer = (BYTE *)malloc(DataSize + ALIGN_UNIT) ;
    memset(DataBuffer, 0, DataSize) ;

    PassThroughDirect.DataBuffer = ALIGNED_ADDR(DataBuffer, ALIGN_UNIT) ;
    memcpy(PassThroughDirect.DataBuffer, data, DataSize) ;

    PassThroughDirect.ReservedAsUchar = 0;
    PassThroughDirect.ReservedAsUlong = 0;
    PassThroughDirect.AtaFlags = (USHORT)(ATA_FLAGS_DATA_OUT | ATA_FLAGS_USE_DMA | ATA_FLAGS_DRDY_REQUIRED);
    PassThroughDirect.TimeOutValue = 10;

    PassThroughDirect.Length = sizeof(PassThroughDirect);
    PassThroughDirect.DataTransferLength = DataSize;

    size = (int)PassThroughDirect.Length + (int)PassThroughDirect.DataTransferLength;

    pCurrentTask = (IDE_REGS *)&PassThroughDirect.CurrentTaskFile[0] ;

    pCurrentTask->bfeaturesreg = Regs.bfeaturesreg;
    pCurrentTask->bsectornumberreg = Regs.bsectornumberreg;
    pCurrentTask->bsectorcountreg = (BYTE)((DataSize + SECTOR_SIZE - 1)/ SECTOR_SIZE);
    pCurrentTask->bdriveheadreg = (BYTE)(0xA0 | ((drive & 1) << 4) | (LBA_Mode << 6));
    pCurrentTask->bcylhighreg = Regs.bcylhighreg;
    pCurrentTask->bcyllowreg = Regs.bcyllowreg;
    pCurrentTask->bcommandreg = Regs.bcommandreg;

    if (0 != DeviceIoControl(handle, IOCTL_ATA_PASS_THROUGH_DIRECT,
        &PassThroughDirect, size,
        &PassThroughDirect, size, &bytrv, 0))
    {
        // wait for data transfer complete
        // even we are using non-overlapped function
        // it sometimes still be failed if we release resource and return
        // immediately after DeviceIoControl returned
        Sleep(1000) ;

        free(DataBuffer) ;

        if (pCurrentTask->bcommandreg == 0x00)
            return FALSE ;
        if (pCurrentTask->bcommandreg & 0x01)
            return FALSE ;
        return TRUE;
    }

    free(DataBuffer) ;
    return FALSE ;
}


Regards,
Jim

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