[PATCH 1/2] drm/xe: Introduce flag to indicate possible fault injection

[Michal Wajdeczko]

When running some fault injection tests the driver might generate
a lot of error logs which might unnecessary stress our CI systems.

Introduce a flag exposed in debugfs that can be used by the fault
injection tests to give the driver a hint to suppress non-essential
error logs or dumps that might be otherwise generated.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Satyanarayana K V P <satyanarayana.k.v.p at intel.com>
Cc: John Harrison <john.c.harrison at intel.com>
---
 drivers/gpu/drm/xe/xe_debugfs.c      |  5 +++++
 drivers/gpu/drm/xe/xe_device.h       | 12 ++++++++++++
 drivers/gpu/drm/xe/xe_device_types.h |  9 +++++++++
 3 files changed, 26 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_debugfs.c b/drivers/gpu/drm/xe/xe_debugfs.c
index d0503959a8ed..0567a57597d3 100644
--- a/drivers/gpu/drm/xe/xe_debugfs.c
+++ b/drivers/gpu/drm/xe/xe_debugfs.c
@@ -235,4 +235,9 @@ void xe_debugfs_register(struct xe_device *xe)
 	xe_pxp_debugfs_register(xe->pxp);
 
 	fault_create_debugfs_attr("fail_gt_reset", root, &gt_reset_failure);
+
+#if IS_ENABLED(CONFIG_FAULT_INJECTION)
+	debugfs_create_bool("fault_injection_in_progress", 0600, root,
+			    &xe->fault_injection_in_progress);
+#endif
 }
diff --git a/drivers/gpu/drm/xe/xe_device.h b/drivers/gpu/drm/xe/xe_device.h
index 0bc3bc8e6803..ea25d8161050 100644
--- a/drivers/gpu/drm/xe/xe_device.h
+++ b/drivers/gpu/drm/xe/xe_device.h
@@ -209,4 +209,16 @@ void xe_file_put(struct xe_file *xef);
 #define LNL_FLUSH_WORK(wrk__) \
 	flush_work(wrk__)
 
+#if IS_ENABLED(CONFIG_FAULT_INJECTION)
+static inline bool xe_fault_injection_in_progress(struct xe_device *xe)
+{
+	return xe->fault_injection_in_progress;
+}
+#else
+static inline bool xe_fault_injection_in_progress(struct xe_device *xe)
+{
+	return false;
+}
+#endif
+
 #endif
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 06c65dace026..513a811a3121 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -578,6 +578,15 @@ struct xe_device {
 	u8 vm_inject_error_position;
 #endif
 
+#if IS_ENABLED(CONFIG_FAULT_INJECTION)
+	/**
+	 * @fault_injection_in_progress: flag used by the fault injection
+	 * tests to allow the driver to suppress non-essential error dumps
+	 * that might be otherwise generated due to an injected fault.
+	 */
+	bool fault_injection_in_progress;
+#endif
+
 	/* private: */
 
 #if IS_ENABLED(CONFIG_DRM_XE_DISPLAY)
-- 
2.47.1