drm/xe/pf: Fix migration initialization

The migration support only needs to be initialized once, but it
was incorrectly called from the xe_gt_sriov_pf_init_hw(), which
is part of the reset flow and may be called multiple times.

Fixes: d86e373 ("drm/xe/pf: Add functions to save and restore VF GuC state")
Signed-off-by: Michal Wajdeczko <[email protected]>
Cc: Michał Winiarski <[email protected]>
Reviewed-by: Rodrigo Vivi <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 9ebb584)
Signed-off-by: Rodrigo Vivi <[email protected]>

Author: mwajdecz

drivers/gpu/drm/xe/xe_gt.c

@@ -532,8 +532,10 @@ static int all_fw_domain_init(struct xe_gt *gt)
 	if (IS_SRIOV_PF(gt_to_xe(gt)) && !xe_gt_is_media_type(gt))
 		xe_lmtt_init_hw(&gt_to_tile(gt)->sriov.pf.lmtt);
 
-	if (IS_SRIOV_PF(gt_to_xe(gt)))
+	if (IS_SRIOV_PF(gt_to_xe(gt))) {
+		xe_gt_sriov_pf_init(gt);
 		xe_gt_sriov_pf_init_hw(gt);
+	}
 
 	xe_force_wake_put(gt_to_fw(gt), fw_ref);
 

drivers/gpu/drm/xe/xe_gt_sriov_pf.c

@@ -68,6 +68,19 @@ int xe_gt_sriov_pf_init_early(struct xe_gt *gt)
 	return 0;
 }
 
+/**
+ * xe_gt_sriov_pf_init - Prepare SR-IOV PF data structures on PF.
+ * @gt: the &xe_gt to initialize
+ *
+ * Late one-time initialization of the PF data.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_gt_sriov_pf_init(struct xe_gt *gt)
+{
+	return xe_gt_sriov_pf_migration_init(gt);
+}
+
 static bool pf_needs_enable_ggtt_guest_update(struct xe_device *xe)
 {
 	return GRAPHICS_VERx100(xe) == 1200;
@@ -90,7 +103,6 @@ void xe_gt_sriov_pf_init_hw(struct xe_gt *gt)
 		pf_enable_ggtt_guest_update(gt);
 
 	xe_gt_sriov_pf_service_update(gt);
-	xe_gt_sriov_pf_migration_init(gt);
 }
 
 static u32 pf_get_vf_regs_stride(struct xe_device *xe)

drivers/gpu/drm/xe/xe_gt_sriov_pf.h

@@ -10,6 +10,7 @@ struct xe_gt;
 
 #ifdef CONFIG_PCI_IOV
 int xe_gt_sriov_pf_init_early(struct xe_gt *gt);
+int xe_gt_sriov_pf_init(struct xe_gt *gt);
 void xe_gt_sriov_pf_init_hw(struct xe_gt *gt);
 void xe_gt_sriov_pf_sanitize_hw(struct xe_gt *gt, unsigned int vfid);
 void xe_gt_sriov_pf_restart(struct xe_gt *gt);
@@ -19,6 +20,11 @@ static inline int xe_gt_sriov_pf_init_early(struct xe_gt *gt)
 	return 0;
 }
 
+static inline int xe_gt_sriov_pf_init(struct xe_gt *gt)
+{
+	return 0;
+}
+
 static inline void xe_gt_sriov_pf_init_hw(struct xe_gt *gt)
 {
 }