1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tyr/file.rs b/drivers/gpu/drm/tyr/file.rs
new file mode 100644
index 000000000000..0ef432947b73
--- /dev/null
+++ b/drivers/gpu/drm/tyr/file.rs
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0 or MIT
+
+use kernel::drm;
+use kernel::prelude::*;
+use kernel::uaccess::UserSlice;
+use kernel::uapi;
+
+use crate::driver::TyrDevice;
+use crate::TyrDriver;
+
+#[pin_data]
+pub(crate) struct File {}
+
+/// Convenience type alias for our DRM `File` type
+pub(crate) type DrmFile = drm::file::File<File>;
+
+impl drm::file::DriverFile for File {
+    type Driver = TyrDriver;
+
+    fn open(_dev: &drm::Device<Self::Driver>) -> Result<Pin<KBox<Self>>> {
+        KBox::try_pin_init(try_pin_init!(Self {}), GFP_KERNEL)
+    }
+}
+
+impl File {
+    pub(crate) fn dev_query(
+        tdev: &TyrDevice,
+        devquery: &mut uapi::drm_panthor_dev_query,
+        _file: &DrmFile,
+    ) -> Result<u32> {
+        if devquery.pointer == 0 {
+            match devquery.type_ {
+                uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_GPU_INFO => {
+                    devquery.size = core::mem::size_of_val(&tdev.gpu_info) as u32;
+                    Ok(0)
+                }
+                _ => Err(EINVAL),
+            }
+        } else {
+            match devquery.type_ {
+                uapi::drm_panthor_dev_query_type_DRM_PANTHOR_DEV_QUERY_GPU_INFO => {
+                    let mut writer = UserSlice::new(
+                        UserPtr::from_addr(devquery.pointer as usize),
+                        devquery.size as usize,
+                    )
+                    .writer();
+
+                    writer.write(&tdev.gpu_info)?;
+
+                    Ok(0)
+                }
+                _ => Err(EINVAL),
+            }
+        }
+    }
+}