2 files changed, 20 insertions, 1 deletions

diff --git a/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp b/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
index 25e3ccef6..03126aeee 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
+++ b/src/core/hle/service/nvdrv/devices/nvhost_gpu.cpp
@@ -32,6 +32,8 @@ u32 nvhost_gpu::ioctl(Ioctl command, const std::vector<u8>& input, std::vector<u
         return AllocGPFIFOEx2(input, output);
     case IoctlCommand::IocAllocObjCtxCommand:
         return AllocateObjectContext(input, output);
+    case IoctlCommand::IocChannelGetWaitbaseCommand:
+        return GetWaitbase(input, output);
     }
 
     if (command.group == NVGPU_IOCTL_MAGIC) {
@@ -138,4 +140,13 @@ u32 nvhost_gpu::SubmitGPFIFO(const std::vector<u8>& input, std::vector<u8>& outp
     return 0;
 }
 
+u32 nvhost_gpu::GetWaitbase(const std::vector<u8>& input, std::vector<u8>& output) {
+    IoctlGetWaitbase params{};
+    std::memcpy(&params, input.data(), sizeof(IoctlGetWaitbase));
+    NGLOG_INFO(Service_NVDRV, "called, unknown=0x{:X}", params.unknown);
+    params.value = 0; // Seems to be hard coded at 0
+    std::memcpy(output.data(), &params, output.size());
+    return 0;
+}
+
 } // namespace Service::Nvidia::Devices
diff --git a/src/core/hle/service/nvdrv/devices/nvhost_gpu.h b/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
index 703c36bbb..beb1c4970 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_gpu.h
@@ -33,6 +33,7 @@ private:
         IocChannelSetPriorityCommand = 0x4004480D,
         IocAllocGPFIFOEx2Command = 0xC020481A,
         IocAllocObjCtxCommand = 0xC0104809,
+        IocChannelGetWaitbaseCommand = 0xC0080003,
     };
 
     enum class CtxObjects : u32_le {
@@ -117,7 +118,13 @@ private:
         IoctlFence fence_out; // returned new fence object for others to wait on
     };
     static_assert(sizeof(IoctlSubmitGpfifo) == 16 + sizeof(IoctlFence),
-                  "submit_gpfifo is incorrect size");
+                  "IoctlSubmitGpfifo is incorrect size");
+
+    struct IoctlGetWaitbase {
+        u32 unknown; // seems to be ignored? Nintendo added this
+        u32 value;
+    };
+    static_assert(sizeof(IoctlGetWaitbase) == 8, "IoctlGetWaitbase is incorrect size");
 
     u32_le nvmap_fd{};
     u64_le user_data{};
@@ -133,6 +140,7 @@ private:
     u32 AllocGPFIFOEx2(const std::vector<u8>& input, std::vector<u8>& output);
     u32 AllocateObjectContext(const std::vector<u8>& input, std::vector<u8>& output);
     u32 SubmitGPFIFO(const std::vector<u8>& input, std::vector<u8>& output);
+    u32 GetWaitbase(const std::vector<u8>& input, std::vector<u8>& output);
 
     std::shared_ptr<nvmap> nvmap_dev;
 };