linux-kernel - [PATCH v3 5/5] sample: rust: pci: add tests for config space routines

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Message-ID: <20251030154842.450518-6-zhiw@nvidia.com>
Date: Thu, 30 Oct 2025 15:48:42 +0000
From: Zhi Wang <zhiw@...dia.com>
To: <rust-for-linux@...r.kernel.org>
CC: <dakr@...nel.org>, <bhelgaas@...gle.com>, <kwilczynski@...nel.org>,
	<ojeda@...nel.org>, <alex.gaynor@...il.com>, <boqun.feng@...il.com>,
	<gary@...yguo.net>, <bjorn3_gh@...tonmail.com>, <lossin@...nel.org>,
	<a.hindborg@...nel.org>, <aliceryhl@...gle.com>, <tmgross@...ch.edu>,
	<linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<cjia@...dia.com>, <smitra@...dia.com>, <ankita@...dia.com>,
	<aniketa@...dia.com>, <kwankhede@...dia.com>, <targupta@...dia.com>,
	<zhiw@...dia.com>, <zhiwang@...nel.org>, <acourbot@...dia.com>,
	<joelagnelf@...dia.com>, <jhubbard@...dia.com>, <markus.probst@...teo.de>
Subject: [PATCH v3 5/5] sample: rust: pci: add tests for config space routines

Add tests exercising the PCI configuration space helpers.

Suggested-by: Danilo Krummrich <dakr@...nel.org>
Signed-off-by: Zhi Wang <zhiw@...dia.com>
---
 samples/rust/rust_driver_pci.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/samples/rust/rust_driver_pci.rs b/samples/rust/rust_driver_pci.rs
index 528e672b6b89..f02ae6d089d0 100644
--- a/samples/rust/rust_driver_pci.rs
+++ b/samples/rust/rust_driver_pci.rs
@@ -58,6 +58,30 @@ fn testdev(index: &TestIndex, bar: &Bar0) -> Result<u32> {
 
         Ok(bar.read32(Regs::COUNT))
     }
+
+    fn config_space(pdev: &pci::Device<Core>) -> Result {
+        let config = pdev.config_space()?;
+
+        dev_info!(
+            pdev.as_ref(),
+            "pci-testdev config space try_read8 rev ID: {:x}\n",
+            config.try_read8(0x8)?
+        );
+
+        dev_info!(
+            pdev.as_ref(),
+            "pci-testdev config space try_read16 vendor ID: {:x}\n",
+            config.try_read16(0)?
+        );
+
+        dev_info!(
+            pdev.as_ref(),
+            "pci-testdev config space try_read32 BAR 0: {:x}\n",
+            config.try_read32(0x10)?
+        );
+
+        Ok(())
+    }
 }
 
 impl pci::Driver for SampleDriver {
@@ -93,6 +117,8 @@ fn probe(pdev: &pci::Device<Core>, info: &Self::IdInfo) -> Result<Pin<KBox<Self>
             Self::testdev(info, bar)?
         );
 
+        Self::config_space(pdev)?;
+
         Ok(drvdata)
     }
 
-- 
2.47.3