1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nova/file.rs b/drivers/gpu/drm/nova/file.rs
new file mode 100644
index 000000000000..0cabaee327bb
--- /dev/null
+++ b/drivers/gpu/drm/nova/file.rs
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+
+use crate::driver::{NovaDevice, NovaDriver};
+use crate::gem;
+use kernel::{
+    alloc::flags::*,
+    drm::{self, device::Device as DrmDevice, gem::BaseObject},
+    prelude::*,
+    uapi,
+};
+
+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 = NovaDriver;
+
+    fn open(dev: &DrmDevice<Self::Driver>) -> Result<Pin<KBox<Self>>> {
+        dev_dbg!(dev.as_ref(), "drm::device::Device::open\n");
+
+        Ok(KBox::new(Self(), GFP_KERNEL)?.into())
+    }
+}
+
+impl File {
+    /// IOCTL: get_param: Query GPU / driver metadata.
+    pub(crate) fn get_param(
+        dev: &NovaDevice,
+        getparam: &mut uapi::drm_nova_getparam,
+        _file: &DrmFile,
+    ) -> Result<u32> {
+        let pdev = &dev.data().pdev;
+
+        getparam.value = match getparam.param as u32 {
+            uapi::NOVA_GETPARAM_VRAM_BAR_SIZE => pdev.resource_len(1)?,
+            _ => return Err(EINVAL),
+        };
+
+        Ok(0)
+    }
+
+    /// IOCTL: gem_create: Create a new DRM GEM object.
+    pub(crate) fn gem_create(
+        dev: &NovaDevice,
+        req: &mut uapi::drm_nova_gem_create,
+        file: &DrmFile,
+    ) -> Result<u32> {
+        let obj = gem::object_new(dev, req.size.try_into()?)?;
+
+        let handle = obj.create_handle(file)?;
+        req.handle = handle;
+
+        Ok(0)
+    }
+
+    /// IOCTL: gem_info: Query GEM metadata.
+    pub(crate) fn gem_info(
+        _dev: &NovaDevice,
+        req: &mut uapi::drm_nova_gem_info,
+        file: &DrmFile,
+    ) -> Result<u32> {
+        let bo = gem::lookup_handle(file, req.handle)?;
+
+        req.size = bo.size().try_into()?;
+
+        Ok(0)
+    }
+}