[PATCH 24/26] drm/xe/pf: Add wait helper for VF FLR

Michał Winiarski
2025-10-11T19:42:10Z

VF FLR requires additional processing done by PF driver.
Add a helper to be used as part of VF driver .reset_done().

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
---
drivers/gpu/drm/xe/xe_sriov_pf_control.c | 24 ++++++++++++++++++++++++
drivers/gpu/drm/xe/xe_sriov_pf_control.h | 1 +
2 files changed, 25 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.c b/drivers/gpu/drm/xe/xe_sriov_pf_control.c
index 10e1f18aa8b11..24845644f269e 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_control.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.c
@@ -122,6 +122,30 @@ int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid)
return result;
}

+/**
+ * xe_sriov_pf_control_wait_flr() - Wait for a VF reset (FLR) to complete.
+ * @xe: the &xe_device
+ * @vfid: the VF identifier
+ *
+ * This function is for PF only.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_control_wait_flr(struct xe_device *xe, unsigned int vfid)
+{
+ struct xe_gt *gt;
+ unsigned int id;
+ int result = 0;
+ int err;
+
+ for_each_gt(gt, xe, id) {
+ err = xe_gt_sriov_pf_control_wait_flr(gt, vfid);
+ result = result ? -EUCLEAN : err;
+ }
+
+ return result;
+}
+
/**
* xe_sriov_pf_control_sync_flr() - Synchronize a VF FLR between all GTs.
* @xe: the &xe_device
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_control.h b/drivers/gpu/drm/xe/xe_sriov_pf_control.h
index 512fd21d87c1e..c8ea54768cfaa 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_control.h
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_control.h
@@ -12,6 +12,7 @@ int xe_sriov_pf_control_pause_vf(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_resume_vf(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_stop_vf(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_reset_vf(struct xe_device *xe, unsigned int vfid);
+int xe_sriov_pf_control_wait_flr(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_sync_flr(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_save_vf(struct xe_device *xe, unsigned int vfid);
int xe_sriov_pf_control_wait_save_vf(struct xe_device *xe, unsigned int vfid);
--
2.50.1