drm/xe/pf: Promote VFs provisioning helpers

As we plan to add more VFs provisioning methods, start moving
related code into single place.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20251015091211.592-2-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/Makefile

@@ -176,6 +176,7 @@ xe-$(CONFIG_PCI_IOV) += \
 	xe_sriov_pf.o \
 	xe_sriov_pf_control.o \
 	xe_sriov_pf_debugfs.o \
+	xe_sriov_pf_provision.o \
 	xe_sriov_pf_service.o \
 	xe_tile_sriov_pf_debugfs.o
 

drivers/gpu/drm/xe/xe_pci_sriov.c

@@ -19,46 +19,9 @@
 #include "xe_sriov_pf.h"
 #include "xe_sriov_pf_control.h"
 #include "xe_sriov_pf_helpers.h"
+#include "xe_sriov_pf_provision.h"
 #include "xe_sriov_printk.h"
 
-static int pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs)
-{
-	unsigned int n;
-
-	for (n = 1; n <= num_vfs; n++)
-		if (!xe_gt_sriov_pf_config_is_empty(gt, n))
-			return false;
-
-	return true;
-}
-
-static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
-{
-	struct xe_gt *gt;
-	unsigned int id;
-	int result = 0, err;
-
-	for_each_gt(gt, xe, id) {
-		if (!pf_needs_provisioning(gt, num_vfs))
-			continue;
-		err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs);
-		result = result ?: err;
-	}
-
-	return result;
-}
-
-static void pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
-{
-	struct xe_gt *gt;
-	unsigned int id;
-	unsigned int n;
-
-	for_each_gt(gt, xe, id)
-		for (n = 1; n <= num_vfs; n++)
-			xe_gt_sriov_pf_config_release(gt, n, true);
-}
-
 static void pf_reset_vfs(struct xe_device *xe, unsigned int num_vfs)
 {
 	unsigned int n;
@@ -168,7 +131,7 @@ static int pf_enable_vfs(struct xe_device *xe, int num_vfs)
 	 */
 	xe_pm_runtime_get_noresume(xe);
 
-	err = pf_provision_vfs(xe, num_vfs);
+	err = xe_sriov_pf_provision_vfs(xe, num_vfs);
 	if (err < 0)
 		goto failed;
 
@@ -192,7 +155,7 @@ static int pf_enable_vfs(struct xe_device *xe, int num_vfs)
 	return num_vfs;
 
 failed:
-	pf_unprovision_vfs(xe, num_vfs);
+	xe_sriov_pf_unprovision_vfs(xe, num_vfs);
 	xe_pm_runtime_put(xe);
 out:
 	xe_sriov_notice(xe, "Failed to enable %u VF%s (%pe)\n",
@@ -218,7 +181,7 @@ static int pf_disable_vfs(struct xe_device *xe)
 
 	pf_reset_vfs(xe, num_vfs);
 
-	pf_unprovision_vfs(xe, num_vfs);
+	xe_sriov_pf_unprovision_vfs(xe, num_vfs);
 
 	/* not needed anymore - see pf_enable_vfs() */
 	xe_pm_runtime_put(xe);

drivers/gpu/drm/xe/xe_sriov_pf_provision.c

@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include "xe_assert.h"
+#include "xe_device.h"
+#include "xe_gt_sriov_pf_config.h"
+#include "xe_sriov.h"
+#include "xe_sriov_pf_helpers.h"
+#include "xe_sriov_pf_provision.h"
+
+static bool pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs)
+{
+	unsigned int n;
+
+	for (n = 1; n <= num_vfs; n++)
+		if (!xe_gt_sriov_pf_config_is_empty(gt, n))
+			return false;
+
+	return true;
+}
+
+static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	int result = 0;
+	int err;
+
+	for_each_gt(gt, xe, id) {
+		if (!pf_needs_provisioning(gt, num_vfs))
+			continue;
+		err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs);
+		result = result ?: err;
+	}
+
+	return result;
+}
+
+static void pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
+{
+	struct xe_gt *gt;
+	unsigned int id;
+	unsigned int n;
+
+	for_each_gt(gt, xe, id)
+		for (n = 1; n <= num_vfs; n++)
+			xe_gt_sriov_pf_config_release(gt, n, true);
+}
+
+/**
+ * xe_sriov_pf_provision_vfs() - Provision VFs in auto-mode.
+ * @xe: the PF &xe_device
+ * @num_vfs: the number of VFs to auto-provision
+ *
+ * This function can only be called on PF.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
+{
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	return pf_provision_vfs(xe, num_vfs);
+}
+
+/**
+ * xe_sriov_pf_unprovision_vfs() - Unprovision VFs in auto-mode.
+ * @xe: the PF &xe_device
+ * @num_vfs: the number of VFs to unprovision
+ *
+ * This function can only be called on PF.
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
+{
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	pf_unprovision_vfs(xe, num_vfs);
+	return 0;
+}

drivers/gpu/drm/xe/xe_sriov_pf_provision.h

@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef _XE_SRIOV_PF_PROVISION_H_
+#define _XE_SRIOV_PF_PROVISION_H_
+
+struct xe_device;
+
+int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs);
+int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs);
+
+#endif