drm/xe: Move migration support to device-level struct

Upcoming changes will allow users to control VF state and obtain its
migration data with a device-level granularity (not tile/gt).
Change the data structures to reflect that and move the GT-level
migration init to happen after device-level init.

Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patch.msgid.link/20251112132220.516975-3-michal.winiarski@intel.com
Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>

Author: mwiniars

drivers/gpu/drm/xe/Makefile

@@ -177,6 +177,7 @@ xe-$(CONFIG_PCI_IOV) += \
 	xe_sriov_pf.o \
 	xe_sriov_pf_control.o \
 	xe_sriov_pf_debugfs.o \
+	xe_sriov_pf_migration.o \
 	xe_sriov_pf_provision.o \
 	xe_sriov_pf_service.o \
 	xe_sriov_pf_sysfs.o \

drivers/gpu/drm/xe/xe_gt_sriov_pf_migration.c

@@ -13,6 +13,7 @@
 #include "xe_guc.h"
 #include "xe_guc_ct.h"
 #include "xe_sriov.h"
+#include "xe_sriov_pf_migration.h"
 
 /* Return: number of dwords saved/restored/required or a negative error code on failure */
 static int guc_action_vf_save_restore(struct xe_guc *guc, u32 vfid, u32 opcode,
@@ -115,8 +116,7 @@ static int pf_send_guc_restore_vf_state(struct xe_gt *gt, unsigned int vfid,
 
 static bool pf_migration_supported(struct xe_gt *gt)
 {
-	xe_gt_assert(gt, IS_SRIOV_PF(gt_to_xe(gt)));
-	return gt->sriov.pf.migration.supported;
+	return xe_sriov_pf_migration_supported(gt_to_xe(gt));
 }
 
 static struct mutex *pf_migration_mutex(struct xe_gt *gt)
@@ -382,12 +382,6 @@ ssize_t xe_gt_sriov_pf_migration_write_guc_state(struct xe_gt *gt, unsigned int
 }
 #endif /* CONFIG_DEBUG_FS */
 
-static bool pf_check_migration_support(struct xe_gt *gt)
-{
-	/* XXX: for now this is for feature enabling only */
-	return IS_ENABLED(CONFIG_DRM_XE_DEBUG);
-}
-
 /**
  * xe_gt_sriov_pf_migration_init() - Initialize support for VF migration.
  * @gt: the &xe_gt
@@ -403,8 +397,6 @@ int xe_gt_sriov_pf_migration_init(struct xe_gt *gt)
 
 	xe_gt_assert(gt, IS_SRIOV_PF(xe));
 
-	gt->sriov.pf.migration.supported = pf_check_migration_support(gt);
-
 	if (!pf_migration_supported(gt))
 		return 0;
 

drivers/gpu/drm/xe/xe_gt_sriov_pf_migration_types.h

@@ -30,9 +30,6 @@ struct xe_gt_sriov_state_snapshot {
  * Used by the PF driver to maintain non-VF specific per-GT data.
  */
 struct xe_gt_sriov_pf_migration {
-	/** @supported: indicates whether the feature is supported */
-	bool supported;
-
 	/** @snapshot_lock: protects all VFs snapshots */
 	struct mutex snapshot_lock;
 };

drivers/gpu/drm/xe/xe_sriov_pf.c

@@ -15,6 +15,7 @@
 #include "xe_sriov.h"
 #include "xe_sriov_pf.h"
 #include "xe_sriov_pf_helpers.h"
+#include "xe_sriov_pf_migration.h"
 #include "xe_sriov_pf_service.h"
 #include "xe_sriov_pf_sysfs.h"
 #include "xe_sriov_printk.h"
@@ -102,6 +103,10 @@ int xe_sriov_pf_init_early(struct xe_device *xe)
 	if (err)
 		return err;
 
+	err = xe_sriov_pf_migration_init(xe);
+	if (err)
+		return err;
+
 	xe_guard_init(&xe->sriov.pf.guard_vfs_enabling, "vfs_enabling");
 
 	xe_sriov_pf_service_init(xe);

drivers/gpu/drm/xe/xe_sriov_pf_migration.c

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include "xe_sriov.h"
+#include "xe_sriov_pf_migration.h"
+
+/**
+ * xe_sriov_pf_migration_supported() - Check if SR-IOV VF migration is supported by the device
+ * @xe: the &xe_device
+ *
+ * Return: true if migration is supported, false otherwise
+ */
+bool xe_sriov_pf_migration_supported(struct xe_device *xe)
+{
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	return xe->sriov.pf.migration.supported;
+}
+
+static bool pf_check_migration_support(struct xe_device *xe)
+{
+	/* XXX: for now this is for feature enabling only */
+	return IS_ENABLED(CONFIG_DRM_XE_DEBUG);
+}
+
+/**
+ * xe_sriov_pf_migration_init() - Initialize support for SR-IOV VF migration.
+ * @xe: the &xe_device
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_migration_init(struct xe_device *xe)
+{
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	xe->sriov.pf.migration.supported = pf_check_migration_support(xe);
+
+	return 0;
+}

drivers/gpu/drm/xe/xe_sriov_pf_migration.h

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef _XE_SRIOV_PF_MIGRATION_H_
+#define _XE_SRIOV_PF_MIGRATION_H_
+
+#include <linux/types.h>
+
+struct xe_device;
+
+int xe_sriov_pf_migration_init(struct xe_device *xe);
+bool xe_sriov_pf_migration_supported(struct xe_device *xe);
+
+#endif

drivers/gpu/drm/xe/xe_sriov_pf_migration_types.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef _XE_SRIOV_PF_MIGRATION_TYPES_H_
+#define _XE_SRIOV_PF_MIGRATION_TYPES_H_
+
+#include <linux/types.h>
+
+/**
+ * struct xe_sriov_pf_migration - Xe device level VF migration data
+ */
+struct xe_sriov_pf_migration {
+	/** @supported: indicates whether VF migration feature is supported */
+	bool supported;
+};
+
+#endif

drivers/gpu/drm/xe/xe_sriov_pf_types.h

@@ -10,6 +10,7 @@
 #include <linux/types.h>
 
 #include "xe_guard.h"
+#include "xe_sriov_pf_migration_types.h"
 #include "xe_sriov_pf_provision_types.h"
 #include "xe_sriov_pf_service_types.h"
 
@@ -48,6 +49,9 @@ struct xe_device_pf {
 	/** @provision: device level provisioning data. */
 	struct xe_sriov_pf_provision provision;
 
+	/** @migration: device level migration data. */
+	struct xe_sriov_pf_migration migration;
+
 	/** @service: device level service data. */
 	struct xe_sriov_pf_service service;