/// <summary>
/// Initialize nvme device
/// </summary>
public void InitDevice()
{
CurrentCID = 1;
mAddress = (int)mDevice.BAR0.Address;
mAddressVirtual = (int)Paging.MapToVirtual(Paging.CurrentDirectory, mAddress, 0x1000, Paging.PageFlags.Present | Paging.PageFlags.Writable);
mRegs = (NVMe_Registers *)mAddressVirtual;
Pci.EnableBusMastering(mDevice);
// TODO: Make this map the right size
mTailsAndHeads = (int *)Paging.MapToVirtual(Paging.CurrentDirectory, mAddress + 0x1000, 0x4000, Paging.PageFlags.Present | Paging.PageFlags.Writable);
ReadCapabilities();
ReadVersion();
ConfigureAdminQueue();
EnableController();
DoIdentify();
CreateQueues();
char *name = (char *)Heap.Alloc(6);
name[0] = 'N';
name[1] = 'V';
name[2] = 'M';
name[3] = 'E';
name[4] = (char)('0' + mID++);
name[5] = '\0';
string nameStr = Util.CharPtrToString(name);
Node node = new Node();
node.Read = readImpl;
node.Write = writeImpl;
NVMeCookie cookie = new NVMeCookie();
cookie.NVMe = this;
node.Cookie = cookie;
Disk.InitalizeNode(node, nameStr);
RootPoint dev = new RootPoint(nameStr, node);
VFS.MountPointDevFS.AddEntry(dev);
Console.Write("[NVME] Init with serialnumber ");
for (int i = 0; i < 20; i++)
{
Console.Write(mSerialNumber[i]);
}
Console.WriteLine("");
}
/// <summary>
/// Read method for filesystem
/// </summary>
/// <param name="node">The node</param>
/// <param name="offset">The offset</param>
/// <param name="size">The size</param>
/// <param name="buffer">The buffer</param>
/// <returns>The amount of bytes read</returns>
private static uint readImpl(Node node, uint offset, uint size, byte[] buffer)
{
// Only support sizes in magnitudes of 512
if (size % 512 != 0)
{
return(0);
}
uint inSize = size / 512;
NVMeCookie cookie = (NVMeCookie)node.Cookie;
return((uint)cookie.NVMe.RWOperation(NVMe_RW_OP.READ, (byte *)Util.ObjectToVoidPtr(buffer), offset, inSize));
}