[nvmewin] Issues with sending NVME IDENTIFY command using the community driver

[Sagi Bar]

Hello All,

My name is Sagi and I am quite new to NVME, actually making my first steps.


I am currently trying to send an NVME IDNTIFY command to the device, but unfortunately I keep getting "The request could not be performed because of an I/O device error.".

The code I am using is largely taken from PT_IOCTL document.
   #define NVME_PT_TIMEOUT 240


         BOOL Status = 0;
         DWORD Count = 0;
         DWORD InputBufLen = 0;
         DWORD OutputBufLen = 0;
         PNVME_PASS_THROUGH_IOCTL pInBuffer = NULL;
         PNVME_PASS_THROUGH_IOCTL pOutBuffer = NULL;
         DWORD size_of_identify_buffer =0x1000; //4k

         /* Allocate input buffer to accommodate size of NVME_PASS_THRUGH_IOCTL only */
         InputBufLen = sizeof(NVME_PASS_THROUGH_IOCTL);
         pInBuffer = (PNVME_PASS_THROUGH_IOCTL) malloc(InputBufLen);

         /* Allocate output buffer to accommodate size of NVME_PASS_THRUGH_IOCTL and data */
         OutputBufLen = sizeof(NVME_PASS_THROUGH_IOCTL) + size_of_identify_buffer - 1;
         pOutBuffer = (PNVME_PASS_THROUGH_IOCTL) malloc(OutputBufLen);


         if (pInBuffer == NULL || pOutBuffer == NULL)
         {
                  cout<<"ERROR allocating buffers for identify command \n";
                  return ERROR_INVALID_PARAM;
         }

         /* Zero out the buffers */
         memset(pInBuffer, 0, InputBufLen);
         memset(pOutBuffer, 0, OutputBufLen);


         /* Populate SRB_IO_CONTROL fields in input buffer */
         pInBuffer->SrbIoCtrl.ControlCode = (ULONG)NVME_PASS_THROUGH_SRB_IO_CODE;
         pInBuffer->SrbIoCtrl.HeaderLength = sizeof(SRB_IO_CONTROL);

         memcpy((UCHAR*)(&pInBuffer->SrbIoCtrl.Signature[0]), NVME_SIG_STR, NVME_SIG_STR_LEN);
         pInBuffer->SrbIoCtrl.Timeout = NVME_PT_TIMEOUT;
         pInBuffer->SrbIoCtrl.Length = InputBufLen - sizeof(SRB_IO_CONTROL);

        pInBuffer->Direction = NVME_FROM_DEV_TO_HOST;

         pInBuffer->NVMeCmd[0]=0x6;
         pInBuffer->NVMeCmd[10]=0x1;


         pInBuffer->DataBufferLen = ByteSizeTX;
         pInBuffer->ReturnBufferLen=OutputBufLen;

         Status = DeviceIoControl(
                  disk_handle,                                  /* Handle to \\.\scsi device via CreateFile */
                  IOCTL_SCSI_MINIPORT,   /* IO control function to a miniport driver */
                  pInBuffer         ,                      /* Input buffer with data sent to driver */
                  InputBufLen,                          /* Length of data sent to driver (in bytes) */
                  pOutBuffer,                             /* Output buffer with data received from driver */
                  OutputBufLen,                       /* Length of data received from driver */
                  &Count,                                  /* Bytes placed in DataBuffer */

                  NULL);                                   /* NULL = no overlap */



In addition, I have launched "DebugView" on the test machine and I seem to get the following messages, produced by sending the IOCTL

"

55461250000 - STORMINI: NVMeProcessIoctl: Code = 0xe0002000, Signature = 0xNvmeMinið

55461250000 - STORMINI: NVMeGetPhysAddr: <Error> Invalid phys addr.

"

Can you please help me to understand what am I doing wrong ?



Thank you,




Sagi Bar
Test & Tools Staff FW Engineer
[cid:image001.png at 01CEA3CD.FE1957E0]
7 Atir Yeda St, Kfar - Saba 44425, Israel
T: +972-9-7632774  | M: +972-54-7665567
F: +972-3-5488666
sagi.bar at SanDisk.com<mailto:sagi.bar at SanDisk.com>


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