[PATCH v2 7/9] rust: drm: gpuvm: add dump_gpuva_info to UniqueRefGpuVm

[Alvin Sun <alvin.sun@linux.dev>]

Add method wrapping drm_debugfs_gpuva_info to dump GPU VA space
mappings into a seq_file. Needed by the Tyr gpuvas debugfs file.

Signed-off-by: Alvin Sun <alvin.sun@linux.dev>
---
 rust/kernel/drm/gpuvm/mod.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/rust/kernel/drm/gpuvm/mod.rs b/rust/kernel/drm/gpuvm/mod.rs
index 20a08b3defeb8..9da88501a4206 100644
--- a/rust/kernel/drm/gpuvm/mod.rs
+++ b/rust/kernel/drm/gpuvm/mod.rs
@@ -312,6 +312,14 @@ pub fn data_ref(&self) -> &T {
         unsafe { &*self.0.data.get() }
     }
 
+    /// Dumps GPU VA space info into a seq_file.
+    ///
+    /// Wraps the C `drm_debugfs_gpuva_info` function.
+    pub fn dump_gpuva_info(&self, m: &crate::seq_file::SeqFile) -> Result {
+        // SAFETY: `m.as_raw()` and `self.as_raw()` are valid by the type invariants.
+        to_result(unsafe { bindings::drm_debugfs_gpuva_info(m.as_raw(), self.as_raw()) })
+    }
+
     /// Access the data owned by this `UniqueRefGpuVm` mutably.
     #[inline]
     pub fn data(&mut self) -> &mut T {

-- 
2.43.0