Each fence has a linear increasing sequence number inside the execution
context, that can be used to decide which fence would be signaled later.
So, expose this attribute to the Rust drivers through a method.
Signed-off-by: Maíra Canal <mcanal@xxxxxxxxxx>
---
rust/kernel/dma_fence.rs | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/rust/kernel/dma_fence.rs b/rust/kernel/dma_fence.rs
index 176e6d250e6c..94fead520274 100644
--- a/rust/kernel/dma_fence.rs
+++ b/rust/kernel/dma_fence.rs
@@ -60,6 +60,13 @@ pub trait RawDmaFence: crate::private::Sealed {
}
}
+ /// Return the seqno from this fence
+ fn seqno(&self) -> u64 {
+ // SAFETY: We hold a reference to a dma_fence and every dma_fence holds
+ // a seqno.
+ unsafe { (*self.raw()).seqno }
+ }
+
/// Signal completion of this fence
fn signal(&self) -> Result {
to_result(unsafe { bindings::dma_fence_signal(self.raw()) })
--
2.39.2
