[PATCH v3 6/8] 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.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: Alvin Sun <alvin.sun@linux.dev>
---
 rust/bindings/bindings_helper.h | 1 +
 rust/kernel/drm/gpuvm/mod.rs    | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/rust/bindings/bindings_helper.h b/rust/bindings/bindings_helper.h
index 1124785e210b3..c3b2a86528934 100644
--- a/rust/bindings/bindings_helper.h
+++ b/rust/bindings/bindings_helper.h
@@ -30,6 +30,7 @@
 
 #include <linux/acpi.h>
 #include <linux/gpu_buddy.h>
+#include <drm/drm_debugfs.h>
 #include <drm/drm_device.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_file.h>
diff --git a/rust/kernel/drm/gpuvm/mod.rs b/rust/kernel/drm/gpuvm/mod.rs
index 20a08b3defeb8..9348b1c3064ec 100644
--- a/rust/kernel/drm/gpuvm/mod.rs
+++ b/rust/kernel/drm/gpuvm/mod.rs
@@ -312,6 +312,15 @@ 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.
+    #[inline]
+    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