nvhost_nvdec: stubbed ChannelMapCmdBuffer

src/core/hle/service/nvdrv/devices/nvhost_nvdec.cpp

@@ -10,6 +10,9 @@
 
 namespace Service::Nvidia::Devices {
 
+constexpr u32 NVHOST_IOCTL_MAGIC(0x0);
+constexpr u32 NVHOST_IOCTL_CHANNEL_MAP_CMD_BUFFER(0x9);
+  
 nvhost_nvdec::nvhost_nvdec(Core::System& system) : nvdevice(system) {}
 nvhost_nvdec::~nvhost_nvdec() = default;
 
@@ -23,6 +26,12 @@ u32 nvhost_nvdec::ioctl(Ioctl command, const std::vector<u8>& input, const std::
     case IoctlCommand::IocSetNVMAPfdCommand:
         return SetNVMAPfd(input, output);
     }
+  
+    if (command.group == NVHOST_IOCTL_MAGIC) {
+        if (command.cmd == NVHOST_IOCTL_CHANNEL_MAP_CMD_BUFFER) {
+            return ChannelMapCmdBuffer(input, output);
+        }
+    }
 
     UNIMPLEMENTED_MSG("Unimplemented ioctl");
     return 0;
@@ -37,4 +46,23 @@ u32 nvhost_nvdec::SetNVMAPfd(const std::vector<u8>& input, std::vector<u8>& outp
     return 0;
 }
 
+u32 nvhost_nvdec::ChannelMapCmdBuffer(const std::vector<u8>& input, std::vector<u8>& output) {
+    IoctlMapCmdBuffer params{};
+    std::memcpy(&params, input.data(), 12);
+
+    std::vector<IoctlHandleMapBuffer> handles(params.num_handles);
+    std::memcpy(handles.data(), input.data() + 12,
+                sizeof(IoctlHandleMapBuffer) * params.num_handles);
+
+    LOG_WARNING(Service_NVDRV, "(STUBBED) called, num_handles: {}, is_compressed: {}", params.num_handles, params.is_compressed);
+
+    //TODO(namkazt): Uses nvmap_pin internally to pin a given number of nvmap handles to an appropriate device
+    // physical address.
+
+    std::memcpy(output.data(), &params, 12);
+    std::memcpy(output.data() + 12, handles.data(),
+                sizeof(IoctlHandleMapBuffer) * params.num_handles);
+    return 0;
+}
+  
 } // namespace Service::Nvidia::Devices