[PATCH 1/6] drm/xe/pci: log ATS/PASID enablement state at probe

[Nareshkumar Gollakoti <naresh.kumar.g@intel.com>]

Add debug logging in xe_pci_probe() for ATS and PASID enablement state
when the corresponding capabilities are present.
This makes platform and IOMMU related bring up issues easier to diagnose.

Also add a small helper to report weather ATS and PASID are both enabled,
for use follow up checks that depend on both features.

Signed-off-by: Nareshkumar Gollakoti <naresh.kumar.g@intel.com>
---
 drivers/gpu/drm/xe/xe_pci.c | 7 +++++++
 drivers/gpu/drm/xe/xe_pci.h | 6 ++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index e44b74b9aa27..40c0f4c42ed3 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -1275,6 +1275,13 @@ static int __xe_pci_probe(struct pci_dev *pdev, const struct xe_device_desc *des
 		xe_step_name(xe->info.step.media),
 		xe_step_name(xe->info.step.basedie));
 
+	if (pdev->ats_cap)
+		drm_dbg(&xe->drm, "Arch ATS = %s",
+			str_enabled_disabled(pdev->ats_enabled));
+	if (pdev->pasid_cap)
+		drm_dbg(&xe->drm, "Arch PASID = %s",
+			str_enabled_disabled(pdev->pasid_enabled));
+
 	drm_dbg(&xe->drm, "SR-IOV support: %s (mode: %s)\n",
 		str_yes_no(xe_device_has_sriov(xe)),
 		xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
diff --git a/drivers/gpu/drm/xe/xe_pci.h b/drivers/gpu/drm/xe/xe_pci.h
index 11bcc5fe2c5b..5f784229a5ec 100644
--- a/drivers/gpu/drm/xe/xe_pci.h
+++ b/drivers/gpu/drm/xe/xe_pci.h
@@ -5,6 +5,7 @@
 
 #ifndef _XE_PCI_H_
 #define _XE_PCI_H_
+#include <linux/pci.h>
 
 struct pci_dev;
 
@@ -12,4 +13,9 @@ int xe_register_pci_driver(void);
 void xe_unregister_pci_driver(void);
 struct xe_device *xe_pci_to_pf_device(struct pci_dev *pdev);
 
+static inline bool xe_pci_ats_pasid_enabled(struct pci_dev *pdev)
+{
+	return pdev->ats_enabled && pdev->pasid_enabled;
+}
+
 #endif
-- 
2.43.0