public static ModePage_02?DecodeModePage_02(byte[] pageResponse)
{
if ((pageResponse?[0] &0x40) == 0x40)
{
return(null);
}
if ((pageResponse?[0] &0x3F) != 0x02)
{
return(null);
}
if (pageResponse[1] + 2 != pageResponse.Length)
{
return(null);
}
if (pageResponse.Length < 12)
{
return(null);
}
var decoded = new ModePage_02();
decoded.PS |= (pageResponse[0] & 0x80) == 0x80;
decoded.BufferFullRatio = pageResponse[2];
decoded.BufferEmptyRatio = pageResponse[3];
decoded.BusInactivityLimit = (ushort)((pageResponse[4] << 8) + pageResponse[5]);
decoded.DisconnectTimeLimit = (ushort)((pageResponse[6] << 8) + pageResponse[7]);
decoded.ConnectTimeLimit = (ushort)((pageResponse[8] << 8) + pageResponse[9]);
decoded.MaxBurstSize = (ushort)((pageResponse[10] << 8) + pageResponse[11]);
if (pageResponse.Length >= 13)
{
decoded.EMDP |= (pageResponse[12] & 0x80) == 0x80;
decoded.DIMM |= (pageResponse[12] & 0x08) == 0x08;
decoded.FairArbitration = (byte)((pageResponse[12] & 0x70) >> 4);
decoded.DTDC = (byte)(pageResponse[12] & 0x07);
}
if (pageResponse.Length >= 16)
{
decoded.FirstBurstSize = (ushort)((pageResponse[14] << 8) + pageResponse[15]);
}
return(decoded);
}
public static string PrettifyModePage_02(ModePage_02?modePage)
{
if (!modePage.HasValue)
{
return(null);
}
ModePage_02 page = modePage.Value;
var sb = new StringBuilder();
sb.AppendLine("SCSI Disconnect-Reconnect mode page:");
if (page.PS)
{
sb.AppendLine("\tParameters can be saved");
}
if (page.BufferFullRatio > 0)
{
sb.AppendFormat("\t{0} ratio of buffer that shall be full prior to attempting a reselection",
page.BufferFullRatio).AppendLine();
}
if (page.BufferEmptyRatio > 0)
{
sb.AppendFormat("\t{0} ratio of buffer that shall be empty prior to attempting a reselection",
page.BufferEmptyRatio).AppendLine();
}
if (page.BusInactivityLimit > 0)
{
sb.AppendFormat("\t{0} µs maximum permitted to assert BSY without a REQ/ACK handshake",
page.BusInactivityLimit * 100).AppendLine();
}
if (page.DisconnectTimeLimit > 0)
{
sb.AppendFormat("\t{0} µs maximum permitted wait after releasing the bus before attempting reselection",
page.DisconnectTimeLimit * 100).AppendLine();
}
if (page.ConnectTimeLimit > 0)
{
sb.
AppendFormat("\t{0} µs allowed to use the bus before disconnecting, if granted the privilege and not restricted",
page.ConnectTimeLimit * 100).AppendLine();
}
if (page.MaxBurstSize > 0)
{
sb.AppendFormat("\t{0} bytes maximum can be transferred before disconnecting", page.MaxBurstSize * 512).
AppendLine();
}
if (page.FirstBurstSize > 0)
{
sb.
AppendFormat("\t{0} bytes maximum can be transferred for a command along with the disconnect command",
page.FirstBurstSize * 512).AppendLine();
}
if (page.DIMM)
{
sb.AppendLine("\tTarget shall not transfer data for a command during the same interconnect tenancy");
}
if (page.EMDP)
{
sb.AppendLine("\tTarget is allowed to re-order the data transfer");
}
switch (page.DTDC)
{
case 0:
sb.AppendLine("\tData transfer disconnect control is not used");
break;
case 1:
sb.AppendLine("\tAll data for a command shall be transferred within a single interconnect tenancy");
break;
case 3:
sb.AppendLine("\tAll data and the response for a command shall be transferred within a single interconnect tenancy");
break;
default:
sb.AppendFormat("\tReserved data transfer disconnect control value {0}", page.DTDC).AppendLine();
break;
}
return(sb.ToString());
}
