From 33151e16a22ee694ca2a72dbeae3e09716ee3efc Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Wed, 27 Oct 2021 13:01:28 -0700
Subject: [PATCH] Linux: Implements virtio ioctls for 32-bit

This makes running Steam under parallels more sane
---
 Source/Tests/LinuxSyscalls/x32/Ioctl/drm.h    |  1 +
 .../LinuxSyscalls/x32/Ioctl/virtio_drm.inl    |  9 ++++++
 .../LinuxSyscalls/x32/IoctlEmulation.cpp      | 29 +++++++++++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644 Source/Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl

diff --git a/Source/Tests/LinuxSyscalls/x32/Ioctl/drm.h b/Source/Tests/LinuxSyscalls/x32/Ioctl/drm.h
index 1db72f80c..baef4f800 100644
--- a/Source/Tests/LinuxSyscalls/x32/Ioctl/drm.h
+++ b/Source/Tests/LinuxSyscalls/x32/Ioctl/drm.h
@@ -16,6 +16,7 @@
 #include <drm/nouveau_drm.h>
 #include <drm/vc4_drm.h>
 #include <drm/v3d_drm.h>
+#include <drm/virtgpu_drm.h>
 #include <sys/ioctl.h>
 
 #define CPYT(x) val.x = x
diff --git a/Source/Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl b/Source/Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl
new file mode 100644
index 000000000..cde293bd8
--- /dev/null
+++ b/Source/Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl
@@ -0,0 +1,9 @@
+_BASIC_META(DRM_IOCTL_VIRTGPU_MAP)
+_BASIC_META(DRM_IOCTL_VIRTGPU_EXECBUFFER)
+_BASIC_META(DRM_IOCTL_VIRTGPU_GETPARAM)
+_BASIC_META(DRM_IOCTL_VIRTGPU_RESOURCE_CREATE)
+_BASIC_META(DRM_IOCTL_VIRTGPU_RESOURCE_INFO)
+_BASIC_META(DRM_IOCTL_VIRTGPU_TRANSFER_FROM_HOST)
+_BASIC_META(DRM_IOCTL_VIRTGPU_TRANSFER_TO_HOST)
+_BASIC_META(DRM_IOCTL_VIRTGPU_WAIT)
+_BASIC_META(DRM_IOCTL_VIRTGPU_GET_CAPS)
diff --git a/Source/Tests/LinuxSyscalls/x32/IoctlEmulation.cpp b/Source/Tests/LinuxSyscalls/x32/IoctlEmulation.cpp
index c151879e7..31b994c5e 100644
--- a/Source/Tests/LinuxSyscalls/x32/IoctlEmulation.cpp
+++ b/Source/Tests/LinuxSyscalls/x32/IoctlEmulation.cpp
@@ -409,6 +409,31 @@ namespace FEX::HLE::x32 {
       return -EPERM;
     }
 
+    uint32_t Virtio_Handler(int fd, uint32_t cmd, uint32_t args) {
+      switch (_IOC_NR(cmd)) {
+#define _BASIC_META(x) case _IOC_NR(x):
+#define _BASIC_META_VAR(x, args...) case _IOC_NR(x):
+#define _CUSTOM_META(name, ioctl_num)
+#define _CUSTOM_META_OFFSET(name, ioctl_num, offset)
+      // DRM
+#include "Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl"
+        {
+          uint64_t Result = ::ioctl(fd, cmd, args);
+          SYSCALL_ERRNO();
+          break;
+        }
+        default:
+          UnhandledIoctl("Virtio", fd, cmd, args);
+          return -EPERM;
+          break;
+      }
+#undef _BASIC_META
+#undef _BASIC_META_VAR
+#undef _CUSTOM_META
+#undef _CUSTOM_META_OFFSET
+      return -EPERM;
+    }
+
     void AssignDeviceTypeToFD(int fd, drm_version const &Version) {
       if (Version.name) {
         if (strcmp(Version.name, "amdgpu") == 0) {
@@ -435,6 +460,9 @@ namespace FEX::HLE::x32 {
         else if (strcmp(Version.name, "v3d") == 0) {
           FDToHandler.SetFDHandler(fd, V3D_Handler);
         }
+        else if (strcmp(Version.name, "virtio_gpu") == 0) {
+          FDToHandler.SetFDHandler(fd, Virtio_Handler);
+        }
         else {
           LogMan::Msg::E("Unknown DRM device: '%s'", Version.name);
         }
@@ -589,6 +617,7 @@ namespace FEX::HLE::x32 {
 #include "Tests/LinuxSyscalls/x32/Ioctl/nouveau_drm.inl"
 #include "Tests/LinuxSyscalls/x32/Ioctl/vc4_drm.inl"
 #include "Tests/LinuxSyscalls/x32/Ioctl/v3d_drm.inl"
+#include "Tests/LinuxSyscalls/x32/Ioctl/virtio_drm.inl"
 
 #undef _BASIC_META
 #undef _BASIC_META_VAR