From b6844bec608ed82511738e9f3911e72aeb05243a Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Sun, 16 Jun 2019 11:43:41 -0400
Subject: [PATCH] NVServices: Correct CtrlEventWaitSync to block the ipc until
 timeout.

---
 src/core/hle/service/nvdrv/devices/nvdevice.h |  4 ++-
 .../service/nvdrv/devices/nvdisp_disp0.cpp    |  3 +-
 .../hle/service/nvdrv/devices/nvdisp_disp0.h  |  3 +-
 .../service/nvdrv/devices/nvhost_as_gpu.cpp   |  3 +-
 .../hle/service/nvdrv/devices/nvhost_as_gpu.h |  3 +-
 .../hle/service/nvdrv/devices/nvhost_ctrl.cpp | 22 +++++++++---
 .../hle/service/nvdrv/devices/nvhost_ctrl.h   |  6 ++--
 .../service/nvdrv/devices/nvhost_ctrl_gpu.cpp |  3 +-
 .../service/nvdrv/devices/nvhost_ctrl_gpu.h   |  3 +-
 .../hle/service/nvdrv/devices/nvhost_gpu.cpp  |  3 +-
 .../hle/service/nvdrv/devices/nvhost_gpu.h    |  3 +-
 .../service/nvdrv/devices/nvhost_nvdec.cpp    |  3 +-
 .../hle/service/nvdrv/devices/nvhost_nvdec.h  |  3 +-
 .../service/nvdrv/devices/nvhost_nvjpg.cpp    |  3 +-
 .../hle/service/nvdrv/devices/nvhost_nvjpg.h  |  3 +-
 .../hle/service/nvdrv/devices/nvhost_vic.cpp  |  3 +-
 .../hle/service/nvdrv/devices/nvhost_vic.h    |  3 +-
 src/core/hle/service/nvdrv/devices/nvmap.cpp  |  3 +-
 src/core/hle/service/nvdrv/devices/nvmap.h    |  3 +-
 src/core/hle/service/nvdrv/interface.cpp      | 34 ++++++++++++++++---
 src/core/hle/service/nvdrv/nvdata.h           |  7 ++++
 src/core/hle/service/nvdrv/nvdrv.cpp          |  9 +++--
 src/core/hle/service/nvdrv/nvdrv.h            |  5 ++-
 23 files changed, 104 insertions(+), 31 deletions(-)

diff --git a/src/core/hle/service/nvdrv/devices/nvdevice.h b/src/core/hle/service/nvdrv/devices/nvdevice.h
index ed606cd15d..fae69eb199 100644
--- a/src/core/hle/service/nvdrv/devices/nvdevice.h
+++ b/src/core/hle/service/nvdrv/devices/nvdevice.h
@@ -8,6 +8,7 @@
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "common/swap.h"
+#include "core/hle/service/nvdrv/nvdata.h"
 
 namespace Core {
 class System;
@@ -37,7 +38,8 @@ public:
      * @param output A buffer where the output data will be written to.
      * @returns The result code of the ioctl.
      */
-    virtual u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) = 0;
+    virtual u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                      IoctlCtrl& ctrl) = 0;
 
 protected:
     Core::System& system;
diff --git a/src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp b/src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp
index 3336b2080f..c918b42250 100644
--- a/src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvdisp_disp0.cpp
@@ -17,7 +17,8 @@ nvdisp_disp0::nvdisp_disp0(Core::System& system, std::shared_ptr<nvmap> nvmap_de
     : nvdevice(system), nvmap_dev(std::move(nvmap_dev)) {}
 nvdisp_disp0 ::~nvdisp_disp0() = default;
 
-u32 nvdisp_disp0::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvdisp_disp0::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                        IoctlCtrl& ctrl) {
     UNIMPLEMENTED_MSG("Unimplemented ioctl");
     return 0;
 }
diff --git a/src/core/hle/service/nvdrv/devices/nvdisp_disp0.h b/src/core/hle/service/nvdrv/devices/nvdisp_disp0.h
index 812967bdf9..e79e490ff0 100644
--- a/src/core/hle/service/nvdrv/devices/nvdisp_disp0.h
+++ b/src/core/hle/service/nvdrv/devices/nvdisp_disp0.h
@@ -20,7 +20,8 @@ public:
     explicit nvdisp_disp0(Core::System& system, std::shared_ptr<nvmap> nvmap_dev);
     ~nvdisp_disp0() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
     /// Performs a screen flip, drawing the buffer pointed to by the handle.
     void flip(u32 buffer_handle, u32 offset, u32 format, u32 width, u32 height, u32 stride,
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.cpp b/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.cpp
index eccc3f1d95..24ab3f2e9f 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.cpp
@@ -26,7 +26,8 @@ nvhost_as_gpu::nvhost_as_gpu(Core::System& system, std::shared_ptr<nvmap> nvmap_
     : nvdevice(system), nvmap_dev(std::move(nvmap_dev)) {}
 nvhost_as_gpu::~nvhost_as_gpu() = default;
 
-u32 nvhost_as_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_as_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                         IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h b/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h
index e45d4f1ff4..30ca5f4c3b 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_as_gpu.h
@@ -20,7 +20,8 @@ public:
     explicit nvhost_as_gpu(Core::System& system, std::shared_ptr<nvmap> nvmap_dev);
     ~nvhost_as_gpu() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
index d412746168..e46e6b94ca 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.cpp
@@ -19,7 +19,8 @@ nvhost_ctrl::nvhost_ctrl(Core::System& system, EventsInterface& events_interface
     : nvdevice(system), events_interface{events_interface} {}
 nvhost_ctrl::~nvhost_ctrl() = default;
 
-u32 nvhost_ctrl::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_ctrl::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                       IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
@@ -27,9 +28,9 @@ u32 nvhost_ctrl::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<
     case IoctlCommand::IocGetConfigCommand:
         return NvOsGetConfigU32(input, output);
     case IoctlCommand::IocCtrlEventWaitCommand:
-        return IocCtrlEventWait(input, output, false);
+        return IocCtrlEventWait(input, output, false, ctrl);
     case IoctlCommand::IocCtrlEventWaitAsyncCommand:
-        return IocCtrlEventWait(input, output, true);
+        return IocCtrlEventWait(input, output, true, ctrl);
     case IoctlCommand::IocCtrlEventRegisterCommand:
         return IocCtrlEventRegister(input, output);
     case IoctlCommand::IocCtrlEventUnregisterCommand:
@@ -50,7 +51,7 @@ u32 nvhost_ctrl::NvOsGetConfigU32(const std::vector<u8>& input, std::vector<u8>&
 }
 
 u32 nvhost_ctrl::IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>& output,
-                                  bool is_async) {
+                                  bool is_async, IoctlCtrl& ctrl) {
     IocCtrlEventWaitParams params{};
     std::memcpy(&params, input.data(), sizeof(params));
     LOG_DEBUG(Service_NVDRV, "syncpt_id={}, threshold={}, timeout={}, is_async={}",
@@ -94,7 +95,11 @@ u32 nvhost_ctrl::IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>&
             return NvResult::BadParameter;
         }
     } else {
-        event_id = events_interface.GetFreeEvent();
+        if (ctrl.fresh_call) {
+            event_id = events_interface.GetFreeEvent();
+        } else {
+            event_id = ctrl.event_id;
+        }
     }
 
     EventState status = events_interface.status[event_id];
@@ -110,6 +115,13 @@ u32 nvhost_ctrl::IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>&
         params.value |= event_id;
         events_interface.events[event_id].writable->Clear();
         gpu.RegisterSyncptInterrupt(params.syncpt_id, params.threshold);
+        if (!is_async && ctrl.fresh_call) {
+            ctrl.must_delay = true;
+            ctrl.timeout = params.timeout;
+            ctrl.event_id = event_id;
+            gpu.Guard(false);
+            return NvResult::Timeout;
+        }
         std::memcpy(output.data(), &params, sizeof(params));
         gpu.Guard(false);
         return NvResult::Timeout;
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
index 6cbf75f89c..7cb41aa547 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl.h
@@ -17,7 +17,8 @@ public:
     nvhost_ctrl(Core::System& system, EventsInterface& events_interface);
     ~nvhost_ctrl() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
@@ -133,7 +134,8 @@ private:
 
     u32 NvOsGetConfigU32(const std::vector<u8>& input, std::vector<u8>& output);
 
-    u32 IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>& output, bool is_async);
+    u32 IocCtrlEventWait(const std::vector<u8>& input, std::vector<u8>& output, bool is_async,
+                         IoctlCtrl& ctrl);
 
     u32 IocCtrlEventRegister(const std::vector<u8>& input, std::vector<u8>& output);
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
index c139f2ceba..e3d2b4470e 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.cpp
@@ -15,7 +15,8 @@ namespace Service::Nvidia::Devices {
 nvhost_ctrl_gpu::nvhost_ctrl_gpu(Core::System& system) : nvdevice(system){};
 nvhost_ctrl_gpu::~nvhost_ctrl_gpu() = default;
 
-u32 nvhost_ctrl_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_ctrl_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                           IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
index 65eac47d14..de36cb014d 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
@@ -16,7 +16,8 @@ public:
     nvhost_ctrl_gpu(Core::System& system);
     ~nvhost_ctrl_gpu() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp b/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
index 13e80bfad5..b9e13fae94 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
@@ -17,7 +17,8 @@ nvhost_gpu::nvhost_gpu(Core::System& system, std::shared_ptr<nvmap> nvmap_dev)
     : nvdevice(system), nvmap_dev(std::move(nvmap_dev)) {}
 nvhost_gpu::~nvhost_gpu() = default;
 
-u32 nvhost_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                      IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_gpu.h b/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
index 106359f876..edc37ff3a6 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
@@ -23,7 +23,8 @@ public:
     explicit nvhost_gpu(Core::System& system, std::shared_ptr<nvmap> nvmap_dev);
     ~nvhost_gpu() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp b/src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp
index 3bfcb84230..f464328f3b 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp
@@ -13,7 +13,8 @@ namespace Service::Nvidia::Devices {
 nvhost_nvdec::nvhost_nvdec(Core::System& system) : nvdevice(system){};
 nvhost_nvdec::~nvhost_nvdec() = default;
 
-u32 nvhost_nvdec::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_nvdec::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                        IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvdec.h b/src/core/hle/service/nvdrv/devices/nvhost_nvdec.h
index febfd4cc4c..c2b7a22f6a 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvdec.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvdec.h
@@ -16,7 +16,8 @@ public:
     nvhost_nvdec(Core::System& system);
     ~nvhost_nvdec() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.cpp b/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.cpp
index 16c683b476..d4d67fc72d 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.cpp
@@ -13,7 +13,8 @@ namespace Service::Nvidia::Devices {
 nvhost_nvjpg::nvhost_nvjpg(Core::System& system) : nvdevice(system){};
 nvhost_nvjpg::~nvhost_nvjpg() = default;
 
-u32 nvhost_nvjpg::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_nvjpg::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                        IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.h b/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.h
index 33b149bb73..4bf280d67f 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_nvjpg.h
@@ -16,7 +16,8 @@ public:
     nvhost_nvjpg(Core::System& system);
     ~nvhost_nvjpg() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_vic.cpp b/src/core/hle/service/nvdrv/devices/nvhost_vic.cpp
index 853136dea1..24e38d31a5 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_vic.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_vic.cpp
@@ -13,7 +13,8 @@ namespace Service::Nvidia::Devices {
 nvhost_vic::nvhost_vic(Core::System& system) : nvdevice(system){};
 nvhost_vic::~nvhost_vic() = default;
 
-u32 nvhost_vic::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvhost_vic::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                      IoctlCtrl& ctrl) {
     LOG_DEBUG(Service_NVDRV, "called, command=0x{:08X}, input_size=0x{:X}, output_size=0x{:X}",
               command.raw, input.size(), output.size());
 
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_vic.h b/src/core/hle/service/nvdrv/devices/nvhost_vic.h
index b71816ba17..3d0934a788 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_vic.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_vic.h
@@ -16,7 +16,8 @@ public:
     nvhost_vic(Core::System& system);
     ~nvhost_vic() override;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
 private:
     enum class IoctlCommand : u32_le {
diff --git a/src/core/hle/service/nvdrv/devices/nvmap.cpp b/src/core/hle/service/nvdrv/devices/nvmap.cpp
index a75ff334b5..349454685b 100644
--- a/src/core/hle/service/nvdrv/devices/nvmap.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvmap.cpp
@@ -28,7 +28,8 @@ VAddr nvmap::GetObjectAddress(u32 handle) const {
     return object->addr;
 }
 
-u32 nvmap::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 nvmap::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+                 IoctlCtrl& ctrl) {
     switch (static_cast<IoctlCommand>(command.raw)) {
     case IoctlCommand::Create:
         return IocCreate(input, output);
diff --git a/src/core/hle/service/nvdrv/devices/nvmap.h b/src/core/hle/service/nvdrv/devices/nvmap.h
index 623c9b232d..b79ed736c1 100644
--- a/src/core/hle/service/nvdrv/devices/nvmap.h
+++ b/src/core/hle/service/nvdrv/devices/nvmap.h
@@ -22,7 +22,8 @@ public:
     /// Returns the allocated address of an nvmap object given its handle.
     VAddr GetObjectAddress(u32 handle) const;
 
-    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output) override;
+    u32 ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl) override;
 
     /// Represents an nvmap object.
     struct Object {
diff --git a/src/core/hle/service/nvdrv/interface.cpp b/src/core/hle/service/nvdrv/interface.cpp
index a4cb8cb81d..45912153dc 100644
--- a/src/core/hle/service/nvdrv/interface.cpp
+++ b/src/core/hle/service/nvdrv/interface.cpp
@@ -8,6 +8,7 @@
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/readable_event.h"
+#include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/writable_event.h"
 #include "core/hle/service/nvdrv/interface.h"
 #include "core/hle/service/nvdrv/nvdata.h"
@@ -41,11 +42,36 @@ void NVDRV::Ioctl(Kernel::HLERequestContext& ctx) {
 
     std::vector<u8> output(ctx.GetWriteBufferSize());
 
-    IPC::ResponseBuilder rb{ctx, 3};
-    rb.Push(RESULT_SUCCESS);
-    rb.Push(nvdrv->Ioctl(fd, command, ctx.ReadBuffer(), output));
+    IoctlCtrl ctrl{};
 
-    ctx.WriteBuffer(output);
+    u32 result = nvdrv->Ioctl(fd, command, ctx.ReadBuffer(), output, ctrl);
+
+    if (!ctrl.must_delay) {
+        IPC::ResponseBuilder rb{ctx, 3};
+        rb.Push(RESULT_SUCCESS);
+        rb.Push(result);
+
+        ctx.WriteBuffer(output);
+        return;
+    }
+    ctrl.fresh_call = false;
+    ctx.SleepClientThread(
+        "NVServices::DelayedResponse", ctrl.timeout,
+        [this, ctrl = ctrl](Kernel::SharedPtr<Kernel::Thread> thread, Kernel::HLERequestContext& ctx,
+                      Kernel::ThreadWakeupReason reason) {
+            IPC::RequestParser rp{ctx};
+            u32 fd = rp.Pop<u32>();
+            u32 command = rp.Pop<u32>();
+            std::vector<u8> output(ctx.GetWriteBufferSize());
+            IoctlCtrl ctrl2{ctrl};
+            u32 result = nvdrv->Ioctl(fd, command, ctx.ReadBuffer(), output, ctrl2);
+            IPC::ResponseBuilder rb{ctx, 3};
+            rb.Push(RESULT_SUCCESS);
+            rb.Push(result);
+
+            ctx.WriteBuffer(output);
+        },
+        nvdrv->GetEventWriteable(ctrl.event_id));
 }
 
 void NVDRV::Close(Kernel::HLERequestContext& ctx) {
diff --git a/src/core/hle/service/nvdrv/nvdata.h b/src/core/hle/service/nvdrv/nvdata.h
index 6dbc90e4c7..22b1dc79b6 100644
--- a/src/core/hle/service/nvdrv/nvdata.h
+++ b/src/core/hle/service/nvdrv/nvdata.h
@@ -34,4 +34,11 @@ enum class EventState {
     Busy = 3,
 };
 
+struct IoctlCtrl {
+    bool fresh_call{true};
+    bool must_delay{};
+    s64 timeout{};
+    s32 event_id{-1};
+};
+
 } // namespace Service::Nvidia
diff --git a/src/core/hle/service/nvdrv/nvdrv.cpp b/src/core/hle/service/nvdrv/nvdrv.cpp
index b87c228bd5..598a1123b1 100644
--- a/src/core/hle/service/nvdrv/nvdrv.cpp
+++ b/src/core/hle/service/nvdrv/nvdrv.cpp
@@ -71,12 +71,13 @@ u32 Module::Open(const std::string& device_name) {
     return fd;
 }
 
-u32 Module::Ioctl(u32 fd, u32 command, const std::vector<u8>& input, std::vector<u8>& output) {
+u32 Module::Ioctl(u32 fd, u32 command, const std::vector<u8>& input, std::vector<u8>& output,
+                  IoctlCtrl& ctrl) {
     auto itr = open_files.find(fd);
     ASSERT_MSG(itr != open_files.end(), "Tried to talk to an invalid device");
 
     auto& device = itr->second;
-    return device->ioctl({command}, input, output);
+    return device->ioctl({command}, input, output, ctrl);
 }
 
 ResultCode Module::Close(u32 fd) {
@@ -103,4 +104,8 @@ Kernel::SharedPtr<Kernel::ReadableEvent> Module::GetEvent(const u32 event_id) {
     return events_interface.events[event_id].readable;
 }
 
+Kernel::SharedPtr<Kernel::WritableEvent> Module::GetEventWriteable(const u32 event_id) {
+    return events_interface.events[event_id].writable;
+}
+
 } // namespace Service::Nvidia
diff --git a/src/core/hle/service/nvdrv/nvdrv.h b/src/core/hle/service/nvdrv/nvdrv.h
index 97b48d150d..b7f6929624 100644
--- a/src/core/hle/service/nvdrv/nvdrv.h
+++ b/src/core/hle/service/nvdrv/nvdrv.h
@@ -95,7 +95,8 @@ public:
     /// Opens a device node and returns a file descriptor to it.
     u32 Open(const std::string& device_name);
     /// Sends an ioctl command to the specified file descriptor.
-    u32 Ioctl(u32 fd, u32 command, const std::vector<u8>& input, std::vector<u8>& output);
+    u32 Ioctl(u32 fd, u32 command, const std::vector<u8>& input, std::vector<u8>& output,
+              IoctlCtrl& ctrl);
     /// Closes a device file descriptor and returns operation success.
     ResultCode Close(u32 fd);
 
@@ -103,6 +104,8 @@ public:
 
     Kernel::SharedPtr<Kernel::ReadableEvent> GetEvent(const u32 event_id);
 
+    Kernel::SharedPtr<Kernel::WritableEvent> GetEventWriteable(const u32 event_id);
+
 private:
     /// Id to use for the next open file descriptor.
     u32 next_fd = 1;