Rewrite nvservices (#800)

* Start rewriting nvservices internals

TODO:

- nvgpu device interface
- nvhost generic device interface

* Some clean up and fixes

- Make sure to remove the fd of a closed channel.
- NvFileDevice now doesn't implement Disposable as it was never used.
- Rename NvHostCtrlGetConfigurationArgument to GetConfigurationArguments
to follow calling convention.
- Make sure to check every ioctls magic.

* Finalize migration for ioctl standard variant

TODO: ioctl2 migration

* Implement SubmitGpfifoEx and fix nvdec

* Implement Ioctl3

* Implement some ioctl3 required by recent games

* Remove unused code and outdated comments

* Return valid event handles with QueryEvent

Also add an exception for unimplemented event ids.

This commit doesn't implement accurately the events, this only define
different events for different event ids.

* Rename all occurance of FileDevice to DeviceFile

* Restub SetClientPid to not cause regressions

* Address comments

* Remove GlobalStateTable

* Address comments

* Align variables in ioctl3

* Some missing alignments

* GetVaRegionsArguments realign

* Make Owner public in NvDeviceFile

* Address LDj3SNuD's comments

Ryujinx.HLE/HOS/Services/Nv/NvDrvServices/NvHostChannel/NvHostGpuDeviceFile.cs

@@ -0,0 +1,78 @@
+using Ryujinx.HLE.HOS.Kernel.Common;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Nv.NvDrvServices.NvHostChannel.Types;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Nv.NvDrvServices.NvHostChannel
+{
+    internal class NvHostGpuDeviceFile : NvHostChannelDeviceFile
+    {
+        private KEvent _smExceptionBptIntReportEvent;
+        private KEvent _smExceptionBptPauseReportEvent;
+        private KEvent _errorNotifierEvent;
+
+        public NvHostGpuDeviceFile(ServiceCtx context) : base(context)
+        {
+            _smExceptionBptIntReportEvent   = new KEvent(context.Device.System);
+            _smExceptionBptPauseReportEvent = new KEvent(context.Device.System);
+            _errorNotifierEvent             = new KEvent(context.Device.System);
+        }
+
+        public override NvInternalResult Ioctl2(NvIoctl command, Span<byte> arguments, Span<byte> inlineInBuffer)
+        {
+            NvInternalResult result = NvInternalResult.NotImplemented;
+
+            if (command.Type == NvIoctl.NvHostMagic)
+            {
+                switch (command.Number)
+                {
+                    case 0x1b:
+                        result = CallIoctlMethod<SubmitGpfifoArguments, long>(SubmitGpfifoEx, arguments, inlineInBuffer);
+                        break;
+                }
+            }
+
+            return result;
+        }
+
+        public override NvInternalResult QueryEvent(out int eventHandle, uint eventId)
+        {
+            // TODO: accurately represent and implement those events.
+            KEvent targetEvent = null;
+
+            switch (eventId)
+            {
+                case 0x1:
+                    targetEvent = _smExceptionBptIntReportEvent;
+                    break;
+                case 0x2:
+                    targetEvent = _smExceptionBptPauseReportEvent;
+                    break;
+                case 0x3:
+                    targetEvent = _errorNotifierEvent;
+                    break;
+            }
+
+            if (targetEvent != null)
+            {
+                if (Owner.HandleTable.GenerateHandle(targetEvent.ReadableEvent, out eventHandle) != KernelResult.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+            else
+            {
+                eventHandle = 0;
+
+                return NvInternalResult.InvalidInput;
+            }
+
+            return NvInternalResult.Success;
+        }
+
+        private NvInternalResult SubmitGpfifoEx(ref SubmitGpfifoArguments arguments, Span<long> inlineData)
+        {
+            return SubmitGpfifo(ref arguments, inlineData);
+        }
+    }
+}