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Implemented decoding mode page 02h.

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This commit is contained in:
Natalia Portillo
2015-10-25 06:22:59 +00:00
parent dae29117d5
commit 42a4a05d2b
2 changed files with 154 additions and 1 deletions
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150
DiscImageChef.Decoders/SCSI/Modes.cs
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@@ -1286,7 +1286,155 @@ namespace DiscImageChef.Decoders.SCSI
return sb.ToString();
}
#endregion Mode Page 0x0a: Control mode page
#endregion Mode Page 0x0A: Control mode page
#region Mode Page 0x02: Disconnect-reconnect page
/// <summary>
/// Disconnect-reconnect page
/// Page code 0x02
/// 16 bytes in SCSI-2
/// </summary>
public struct ModePage_02
{
/// <summary>
/// Parameters can be saved
/// </summary>
public bool PS;
/// <summary>
/// How full should be the buffer prior to attempting a reselection
/// </summary>
public byte BufferFullRatio;
/// <summary>
/// How empty should be the buffer prior to attempting a reselection
/// </summary>
public byte BufferEmptyRatio;
/// <summary>
/// Max. time in 100 µs increments that the target is permitted to assert BSY without a REQ/ACK
/// </summary>
public ushort BusInactivityLimit;
/// <summary>
/// Min. time in 100 µs increments to wait after releasing the bus before attempting reselection
/// </summary>
public ushort DisconnectTimeLimit;
/// <summary>
/// Max. time in 100 µs increments allowed to use the bus before disconnecting, if granted the privilege and not restricted by <see cref="DTDC"/>
/// </summary>
public ushort ConnectTimeLimit;
/// <summary>
/// Maximum amount of data before disconnecting in 512 bytes increments
/// </summary>
public ushort MaxBurstSize;
/// <summary>
/// Data transfer disconnect control
/// </summary>
public byte DTDC;
/// <summary>
/// Target shall not transfer data for a command during the same interconnect tenancy
/// </summary>
public bool DIMM;
/// <summary>
/// Wether to use fair or unfair arbitration when requesting an interconnect tenancy
/// </summary>
public byte FairArbitration;
/// <summary>
/// Max. ammount of data in 512 bytes increments that may be transferred for a command along with the command
/// </summary>
public ushort FirstBurstSize;
/// <summary>
/// Target is allowed to re-order the data transfer
/// </summary>
public bool EMDP;
}
public static ModePage_02? DecodeModePage_02(byte[] pageResponse)
{
if (pageResponse == null)
return null;
if ((pageResponse[0] & 0x3F) != 0x02)
return null;
if (pageResponse[1] + 2 != pageResponse.Length)
return null;
if (pageResponse.Length < 16)
return null;
ModePage_02 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]);
decoded.FirstBurstSize = (ushort)((pageResponse[14] << 8) + pageResponse[15]);
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);
return decoded;
}
public static string PrettifyModePage_02(byte[] pageResponse)
{
return PrettifyModePage_02(DecodeModePage_02(pageResponse));
}
public static string PrettifyModePage_02(ModePage_02? modePage)
{
if (!modePage.HasValue)
return null;
ModePage_02 page = modePage.Value;
StringBuilder 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", (int)page.BusInactivityLimit * 100).AppendLine();
if (page.DisconnectTimeLimit > 0)
sb.AppendFormat("\t{0} µs maximum permitted wait after releasing the bus before attempting reselection", (int)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", (int)page.ConnectTimeLimit * 100).AppendLine();
if (page.MaxBurstSize > 0)
sb.AppendFormat("\t{0} bytes maximum can be transferred before disconnecting", (int)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", (int)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();
}
#endregion Mode Page 0x02: Disconnect-reconnect page
}
}