drm/xe/pf: Add support to configure GuC SR-IOV policies

There are few knobs inside GuC firmware to control VFs scheduling.
Add basic functions to support their reconfigurations.
We will start using them shortly once we prepare debugfs.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Piotr Piórkowski <piotr.piorkowski@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240410170338.1199-6-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/Makefile

@@ -161,6 +161,7 @@ xe-y += \
 
 xe-$(CONFIG_PCI_IOV) += \
 	xe_gt_sriov_pf_control.o \
+	xe_gt_sriov_pf_policy.o \
 	xe_lmtt.o \
 	xe_lmtt_2l.o \
 	xe_lmtt_ml.o \

drivers/gpu/drm/xe/xe_gt_sriov_pf_policy.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023-2024 Intel Corporation
+ */
+
+#ifndef _XE_GT_SRIOV_PF_POLICY_H_
+#define _XE_GT_SRIOV_PF_POLICY_H_
+
+#include <linux/types.h>
+
+struct drm_printer;
+struct xe_gt;
+
+int xe_gt_sriov_pf_policy_set_sched_if_idle(struct xe_gt *gt, bool enable);
+bool xe_gt_sriov_pf_policy_get_sched_if_idle(struct xe_gt *gt);
+int xe_gt_sriov_pf_policy_set_reset_engine(struct xe_gt *gt, bool enable);
+bool xe_gt_sriov_pf_policy_get_reset_engine(struct xe_gt *gt);
+int xe_gt_sriov_pf_policy_set_sample_period(struct xe_gt *gt, u32 value);
+u32 xe_gt_sriov_pf_policy_get_sample_period(struct xe_gt *gt);
+
+void xe_gt_sriov_pf_policy_sanitize(struct xe_gt *gt);
+int xe_gt_sriov_pf_policy_reprovision(struct xe_gt *gt, bool reset);
+int xe_gt_sriov_pf_policy_print(struct xe_gt *gt, struct drm_printer *p);
+
+#endif

drivers/gpu/drm/xe/xe_gt_sriov_pf_policy_types.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023-2024 Intel Corporation
+ */
+
+#ifndef _XE_GT_SRIOV_PF_POLICY_TYPES_H_
+#define _XE_GT_SRIOV_PF_POLICY_TYPES_H_
+
+#include <linux/types.h>
+
+/**
+ * struct xe_gt_sriov_guc_policies - GuC SR-IOV policies.
+ * @sched_if_idle: controls strict scheduling policy.
+ * @reset_engine: controls engines reset on VF switch policy.
+ * @sample_period: adverse events sampling period (in milliseconds).
+ */
+struct xe_gt_sriov_guc_policies {
+	bool sched_if_idle;
+	bool reset_engine;
+	u32 sample_period;
+};
+
+/**
+ * struct xe_gt_sriov_pf_policy - PF policy data.
+ * @guc: GuC scheduling policies.
+ */
+struct xe_gt_sriov_pf_policy {
+	struct xe_gt_sriov_guc_policies guc;
+};
+
+#endif

drivers/gpu/drm/xe/xe_gt_sriov_pf_types.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023-2024 Intel Corporation
+ */
+
+#ifndef _XE_GT_SRIOV_PF_TYPES_H_
+#define _XE_GT_SRIOV_PF_TYPES_H_
+
+#include <linux/types.h>
+
+#include "xe_gt_sriov_pf_policy_types.h"
+
+/**
+ * struct xe_gt_sriov_pf - GT level PF virtualization data.
+ * @policy: policy data.
+ */
+struct xe_gt_sriov_pf {
+	struct xe_gt_sriov_pf_policy policy;
+};
+
+#endif

drivers/gpu/drm/xe/xe_gt_types.h

@@ -8,6 +8,7 @@
 
 #include "xe_force_wake_types.h"
 #include "xe_gt_idle_types.h"
+#include "xe_gt_sriov_pf_types.h"
 #include "xe_hw_engine_types.h"
 #include "xe_hw_fence_types.h"
 #include "xe_reg_sr_types.h"
@@ -140,6 +141,12 @@ struct xe_gt {
 		u32 adj_offset;
 	} mmio;
 
+	/** @sriov: virtualization data related to GT */
+	union {
+		/** @sriov.pf: PF data. Valid only if driver is running as PF */
+		struct xe_gt_sriov_pf pf;
+	} sriov;
+
 	/**
 	 * @reg_sr: table with registers to be restored on GT init/resume/reset
 	 */