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using Ryujinx.Horizon.Common;
using Ryujinx.Horizon.Sdk.Sf.Hipc;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Horizon.Sdk.Sf.Cmif
{
static class CmifMessage
{
public const uint CmifInHeaderMagic = 0x49434653; // SFCI
public const uint CmifOutHeaderMagic = 0x4f434653; // SFCO
public static CmifRequest CreateRequest(Span<byte> output, CmifRequestFormat format)
{
int totalSize = 16;
if (format.ObjectId != 0)
{
totalSize += Unsafe.SizeOf<CmifDomainInHeader>() + format.ObjectsCount * sizeof(int);
}
totalSize += Unsafe.SizeOf<CmifInHeader>() + format.DataSize;
totalSize = (totalSize + 1) & ~1;
int outPointerSizeTableOffset = totalSize;
int outPointerSizeTableSize = format.OutAutoBuffersCount + format.OutPointersCount;
totalSize += sizeof(ushort) * outPointerSizeTableSize;
int rawDataSizeInWords = (totalSize + sizeof(uint) - 1) / sizeof(uint);
CmifRequest request = new CmifRequest();
request.Hipc = HipcMessage.WriteMessage(output, new HipcMetadata()
{
Type = format.Context != 0 ? (int)CommandType.RequestWithContext : (int)CommandType.Request,
SendStaticsCount = format.InAutoBuffersCount + format.InPointersCount,
SendBuffersCount = format.InAutoBuffersCount + format.InBuffersCount,
ReceiveBuffersCount = format.OutAutoBuffersCount + format.OutBuffersCount,
ExchangeBuffersCount = format.InOutBuffersCount,
DataWordsCount = rawDataSizeInWords,
ReceiveStaticsCount = outPointerSizeTableSize + format.OutFixedPointersCount,
SendPid = format.SendPid,
CopyHandlesCount = format.HandlesCount,
MoveHandlesCount = 0
});
Span<uint> data = request.Hipc.DataWords;
if (format.ObjectId != 0)
{
ref CmifDomainInHeader domainHeader = ref MemoryMarshal.Cast<uint, CmifDomainInHeader>(data)[0];
int payloadSize = Unsafe.SizeOf<CmifInHeader>() + format.DataSize;
domainHeader = new CmifDomainInHeader()
{
Type = CmifDomainRequestType.SendMessage,
ObjectsCount = (byte)format.ObjectsCount,
DataSize = (ushort)payloadSize,
ObjectId = format.ObjectId,
Padding = 0,
Token = format.Context
};
data = data.Slice(Unsafe.SizeOf<CmifDomainInHeader>() / sizeof(uint));
request.Objects = data.Slice((payloadSize + sizeof(uint) - 1) / sizeof(uint));
}
ref CmifInHeader header = ref MemoryMarshal.Cast<uint, CmifInHeader>(data)[0];
header = new CmifInHeader()
{
Magic = CmifInHeaderMagic,
Version = format.Context != 0 ? 1u : 0u,
CommandId = format.RequestId,
Token = format.ObjectId != 0 ? 0u : format.Context
};
request.Data = MemoryMarshal.Cast<uint, byte>(data).Slice(Unsafe.SizeOf<CmifInHeader>());
int paddingSizeBefore = (rawDataSizeInWords - request.Hipc.DataWords.Length) * sizeof(uint);
Span<byte> outPointerTable = MemoryMarshal.Cast<uint, byte>(request.Hipc.DataWords).Slice(outPointerSizeTableOffset - paddingSizeBefore);
request.OutPointerSizes = MemoryMarshal.Cast<byte, ushort>(outPointerTable);
request.ServerPointerSize = format.ServerPointerSize;
return request;
}
public static Result ParseResponse(out CmifResponse response, Span<byte> input, bool isDomain, int size)
{
HipcMessage responseMessage = new HipcMessage(input);
Span<byte> data = MemoryMarshal.Cast<uint, byte>(responseMessage.Data.DataWords);
Span<uint> objects = Span<uint>.Empty;
if (isDomain)
{
data = data.Slice(Unsafe.SizeOf<CmifDomainOutHeader>());
objects = MemoryMarshal.Cast<byte, uint>(data.Slice(Unsafe.SizeOf<CmifOutHeader>() + size));
}
CmifOutHeader header = MemoryMarshal.Cast<byte, CmifOutHeader>(data)[0];
if (header.Magic != CmifOutHeaderMagic)
{
response = default;
return SfResult.InvalidOutHeader;
}
if (header.Result.IsFailure)
{
response = default;
return header.Result;
}
response = new CmifResponse()
{
Data = data.Slice(Unsafe.SizeOf<CmifOutHeader>()),
Objects = objects,
CopyHandles = responseMessage.Data.CopyHandles,
MoveHandles = responseMessage.Data.MoveHandles
};
return Result.Success;
}
}
}
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