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using Ryujinx.Common;
using Ryujinx.HLE.HOS.Kernel.Common;
using Ryujinx.HLE.HOS.Kernel.Memory;
using System.Collections.Generic;
namespace Ryujinx.HLE.HOS.Kernel.Ipc
{
class KBufferDescriptorTable
{
private const int MaxInternalBuffersCount = 8;
private List<KBufferDescriptor> _sendBufferDescriptors;
private List<KBufferDescriptor> _receiveBufferDescriptors;
private List<KBufferDescriptor> _exchangeBufferDescriptors;
public KBufferDescriptorTable()
{
_sendBufferDescriptors = new List<KBufferDescriptor>(MaxInternalBuffersCount);
_receiveBufferDescriptors = new List<KBufferDescriptor>(MaxInternalBuffersCount);
_exchangeBufferDescriptors = new List<KBufferDescriptor>(MaxInternalBuffersCount);
}
public KernelResult AddSendBuffer(ulong src, ulong dst, ulong size, MemoryState state)
{
return Add(_sendBufferDescriptors, src, dst, size, state);
}
public KernelResult AddReceiveBuffer(ulong src, ulong dst, ulong size, MemoryState state)
{
return Add(_receiveBufferDescriptors, src, dst, size, state);
}
public KernelResult AddExchangeBuffer(ulong src, ulong dst, ulong size, MemoryState state)
{
return Add(_exchangeBufferDescriptors, src, dst, size, state);
}
private KernelResult Add(List<KBufferDescriptor> list, ulong src, ulong dst, ulong size, MemoryState state)
{
if (list.Count < MaxInternalBuffersCount)
{
list.Add(new KBufferDescriptor(src, dst, size, state));
return KernelResult.Success;
}
return KernelResult.OutOfMemory;
}
public KernelResult CopyBuffersToClient(KPageTableBase memoryManager)
{
KernelResult result = CopyToClient(memoryManager, _receiveBufferDescriptors);
if (result != KernelResult.Success)
{
return result;
}
return CopyToClient(memoryManager, _exchangeBufferDescriptors);
}
private KernelResult CopyToClient(KPageTableBase memoryManager, List<KBufferDescriptor> list)
{
foreach (KBufferDescriptor desc in list)
{
MemoryState stateMask;
switch (desc.State)
{
case MemoryState.IpcBuffer0: stateMask = MemoryState.IpcSendAllowedType0; break;
case MemoryState.IpcBuffer1: stateMask = MemoryState.IpcSendAllowedType1; break;
case MemoryState.IpcBuffer3: stateMask = MemoryState.IpcSendAllowedType3; break;
default: return KernelResult.InvalidCombination;
}
MemoryAttribute attributeMask = MemoryAttribute.Borrowed | MemoryAttribute.Uncached;
if (desc.State == MemoryState.IpcBuffer0)
{
attributeMask |= MemoryAttribute.DeviceMapped;
}
ulong clientAddrTruncated = BitUtils.AlignDown(desc.ClientAddress, KPageTableBase.PageSize);
ulong clientAddrRounded = BitUtils.AlignUp (desc.ClientAddress, KPageTableBase.PageSize);
// Check if address is not aligned, in this case we need to perform 2 copies.
if (clientAddrTruncated != clientAddrRounded)
{
ulong copySize = clientAddrRounded - desc.ClientAddress;
if (copySize > desc.Size)
{
copySize = desc.Size;
}
KernelResult result = memoryManager.CopyDataFromCurrentProcess(
desc.ClientAddress,
copySize,
stateMask,
stateMask,
KMemoryPermission.ReadAndWrite,
attributeMask,
MemoryAttribute.None,
desc.ServerAddress);
if (result != KernelResult.Success)
{
return result;
}
}
ulong clientEndAddr = desc.ClientAddress + desc.Size;
ulong serverEndAddr = desc.ServerAddress + desc.Size;
ulong clientEndAddrTruncated = BitUtils.AlignDown(clientEndAddr, KPageTableBase.PageSize);
ulong clientEndAddrRounded = BitUtils.AlignUp (clientEndAddr, KPageTableBase.PageSize);
ulong serverEndAddrTruncated = BitUtils.AlignDown(serverEndAddr, KPageTableBase.PageSize);
if (clientEndAddrTruncated < clientEndAddrRounded &&
(clientAddrTruncated == clientAddrRounded || clientAddrTruncated < clientEndAddrTruncated))
{
KernelResult result = memoryManager.CopyDataFromCurrentProcess(
clientEndAddrTruncated,
clientEndAddr - clientEndAddrTruncated,
stateMask,
stateMask,
KMemoryPermission.ReadAndWrite,
attributeMask,
MemoryAttribute.None,
serverEndAddrTruncated);
if (result != KernelResult.Success)
{
return result;
}
}
}
return KernelResult.Success;
}
public KernelResult UnmapServerBuffers(KPageTableBase memoryManager)
{
KernelResult result = UnmapServer(memoryManager, _sendBufferDescriptors);
if (result != KernelResult.Success)
{
return result;
}
result = UnmapServer(memoryManager, _receiveBufferDescriptors);
if (result != KernelResult.Success)
{
return result;
}
return UnmapServer(memoryManager, _exchangeBufferDescriptors);
}
private KernelResult UnmapServer(KPageTableBase memoryManager, List<KBufferDescriptor> list)
{
foreach (KBufferDescriptor descriptor in list)
{
KernelResult result = memoryManager.UnmapNoAttributeIfStateEquals(
descriptor.ServerAddress,
descriptor.Size,
descriptor.State);
if (result != KernelResult.Success)
{
return result;
}
}
return KernelResult.Success;
}
public KernelResult RestoreClientBuffers(KPageTableBase memoryManager)
{
KernelResult result = RestoreClient(memoryManager, _sendBufferDescriptors);
if (result != KernelResult.Success)
{
return result;
}
result = RestoreClient(memoryManager, _receiveBufferDescriptors);
if (result != KernelResult.Success)
{
return result;
}
return RestoreClient(memoryManager, _exchangeBufferDescriptors);
}
private KernelResult RestoreClient(KPageTableBase memoryManager, List<KBufferDescriptor> list)
{
foreach (KBufferDescriptor descriptor in list)
{
KernelResult result = memoryManager.UnmapIpcRestorePermission(
descriptor.ClientAddress,
descriptor.Size,
descriptor.State);
if (result != KernelResult.Success)
{
return result;
}
}
return KernelResult.Success;
}
}
}
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