From: Michal Wajdeczko <michal.wajdeczko@intel.com>
Date: Wed, 15 Oct 2025 09:12:07 +0000 (+0200)
Subject: drm/xe/pf: Automatically provision VFs only in auto-mode
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5546bc207110d4b5c187f002097cde07d1926ab3;p=thirdparty%2Fkernel%2Flinux.git

drm/xe/pf: Automatically provision VFs only in auto-mode

We shouldn't attempt to auto-provision VFs once we allow other
provisioning methods. Make the code aware of the new condition.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20251015091211.592-3-michal.wajdeczko@intel.com
---

diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_provision.c b/drivers/gpu/drm/xe/xe_sriov_pf_provision.c
index 4895d0a700890..1e782a96bbdd9 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_provision.c
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_provision.c
@@ -9,6 +9,14 @@
 #include "xe_sriov.h"
 #include "xe_sriov_pf_helpers.h"
 #include "xe_sriov_pf_provision.h"
+#include "xe_sriov_pf_provision_types.h"
+
+static bool pf_auto_provisioning_mode(struct xe_device *xe)
+{
+	xe_assert(xe, IS_SRIOV_PF(xe));
+
+	return xe->sriov.pf.provision.mode == XE_SRIOV_PROVISIONING_MODE_AUTO;
+}
 
 static bool pf_needs_provisioning(struct xe_gt *gt, unsigned int num_vfs)
 {
@@ -30,7 +38,7 @@ static int pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
 
 	for_each_gt(gt, xe, id) {
 		if (!pf_needs_provisioning(gt, num_vfs))
-			continue;
+			return -EUCLEAN;
 		err = xe_gt_sriov_pf_config_set_fair(gt, VFID(1), num_vfs);
 		result = result ?: err;
 	}
@@ -62,6 +70,9 @@ int xe_sriov_pf_provision_vfs(struct xe_device *xe, unsigned int num_vfs)
 {
 	xe_assert(xe, IS_SRIOV_PF(xe));
 
+	if (!pf_auto_provisioning_mode(xe))
+		return 0;
+
 	return pf_provision_vfs(xe, num_vfs);
 }
 
@@ -78,6 +89,9 @@ int xe_sriov_pf_unprovision_vfs(struct xe_device *xe, unsigned int num_vfs)
 {
 	xe_assert(xe, IS_SRIOV_PF(xe));
 
+	if (!pf_auto_provisioning_mode(xe))
+		return 0;
+
 	pf_unprovision_vfs(xe, num_vfs);
 	return 0;
 }
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_provision_types.h b/drivers/gpu/drm/xe/xe_sriov_pf_provision_types.h
new file mode 100644
index 0000000000000..f72bc5db3a60e
--- /dev/null
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_provision_types.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#ifndef _XE_SRIOV_PF_PROVISION_TYPES_H_
+#define _XE_SRIOV_PF_PROVISION_TYPES_H_
+
+#include <linux/build_bug.h>
+
+/**
+ * enum xe_sriov_provisioning_mode - SR-IOV provisioning mode.
+ *
+ * @XE_SRIOV_PROVISIONING_MODE_AUTO: VFs are provisioned during VFs enabling.
+ *                                   Any allocated resources to the VFs will be
+ *                                   automatically released when disabling VFs.
+ *                                   This is a default mode.
+ */
+enum xe_sriov_provisioning_mode {
+	XE_SRIOV_PROVISIONING_MODE_AUTO,
+};
+static_assert(XE_SRIOV_PROVISIONING_MODE_AUTO == 0);
+
+/**
+ * struct xe_sriov_pf_provision - Data used by the PF provisioning.
+ */
+struct xe_sriov_pf_provision {
+	/** @mode: selected provisioning mode. */
+	enum xe_sriov_provisioning_mode mode;
+};
+
+#endif
diff --git a/drivers/gpu/drm/xe/xe_sriov_pf_types.h b/drivers/gpu/drm/xe/xe_sriov_pf_types.h
index 956a88f9f213d..c753cd59aed2b 100644
--- a/drivers/gpu/drm/xe/xe_sriov_pf_types.h
+++ b/drivers/gpu/drm/xe/xe_sriov_pf_types.h
@@ -9,6 +9,7 @@
 #include <linux/mutex.h>
 #include <linux/types.h>
 
+#include "xe_sriov_pf_provision_types.h"
 #include "xe_sriov_pf_service_types.h"
 
 /**
@@ -35,6 +36,9 @@ struct xe_device_pf {
 	/** @master_lock: protects all VFs configurations across GTs */
 	struct mutex master_lock;
 
+	/** @provision: device level provisioning data. */
+	struct xe_sriov_pf_provision provision;
+
 	/** @service: device level service data. */
 	struct xe_sriov_pf_service service;