155 lines
4.6 KiB
Plaintext
155 lines
4.6 KiB
Plaintext
////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: IdeDiskContract.cs
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//
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// Defines Message contracts for communications over channels with the Disk Device Driver
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using System;
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using System.Runtime.Remoting;
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using System.Runtime.InteropServices;
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using Microsoft.SingSharp;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.Directory;
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using Microsoft.Singularity.Io;
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namespace Microsoft.Singularity.Io
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{
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public enum DiskAttributes : uint {
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ReadOnly = 0x01,
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Removable = 0x02,
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}
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public contract DiskDeviceContract : DeviceContract
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{
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/// <summary>
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/// Retrieve the device name.
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/// </summary>
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in message GetDeviceName();
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out message AckGetDeviceName(char* opt(ExHeap[])data);
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/// <summary>
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/// Retrieve sector offset of first sector on disk or partition.
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/// </summary>
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in message GetStartSector();
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out message AckGetStartSector(ulong startSector);
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/// <summary>
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/// Retrieve number of sectors available on drive or partition.
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/// </summary>
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in message GetSectorCount();
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out message AckGetSectorCount(ulong sectorCount);
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/// <summary>
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/// Query for system identifier from partition table for
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/// partition. This method is only applicable to partitioned
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/// drives.
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/// </summary>
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in message GetSystemId();
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out message SystemId(byte systemId);
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out message NoSystemId();
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in message GetDiskAttributes();
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out message AckGetDiskAttributes(DiskAttributes flags);
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/// <summary>
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/// Read data from disk.
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/// <parameter name="sectorId">Relative sector on disk or partition to read data from. </parameter>
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/// </summary>
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in message Read(byte []! in ExHeap data,
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ulong offset,
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ulong length,
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ulong sectorId);
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out message AckRead(byte []! in ExHeap data);
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out message NakRead();
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/// <summary>
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/// Write data to disk.
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/// <parameter name="sectorId">Relative sector on disk or partition to write data to. </parameter>
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/// </summary>
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in message Write(byte []! in ExHeap data,
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ulong offset,
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ulong length,
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ulong sectorId);
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out message AckWrite(byte []! in ExHeap data);
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out message NakWrite();
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in message NoOp();
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out message AckNoOp();
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in message ReadPerf(int numMB, int chunkSize);
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out message AckReadPerf(long cycles, long ticks);
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out message Success();
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override state Start: one {
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Success! -> Ready;
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}
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state Ready: one
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{
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GetDeviceName? -> DoGetDeviceName;
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GetDiskAttributes? -> DoGetDiskAttributes;
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GetStartSector? -> DoGetStartSector;
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GetSectorCount? -> DoGetSectorCount;
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GetSystemId? -> DoGetSystemId;
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Read? -> DoRead;
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Write? -> DoWrite;
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NoOp? -> DoNoOp;
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ReadPerf? -> DoReadPerf;
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}
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state DoGetDeviceName: one
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{
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AckGetDeviceName! -> Ready;
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}
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state DoGetDiskAttributes: one
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{
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AckGetDiskAttributes! -> Ready;
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}
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state DoGetStartSector: one
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{
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AckGetStartSector! -> Ready;
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}
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state DoGetSectorCount: one
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{
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AckGetSectorCount! -> Ready;
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}
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state DoGetSystemId: one
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{
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SystemId! -> Ready;
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NoSystemId! -> Ready;
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}
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state DoRead: one
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{
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AckRead! -> Ready;
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NakRead! -> Ready;
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}
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state DoReadPerf: one
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{
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AckReadPerf! -> Ready;
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}
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state DoWrite: one
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{
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AckWrite! -> Ready;
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NakWrite! -> Ready;
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}
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state DoNoOp: one
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{
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AckNoOp! -> Ready;
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}
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}
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}
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