Contributors: 7
Author Tokens Token Proportion Commits Commit Proportion
Daniele Ceraolo Spurio 132 36.67% 7 29.17%
Michal Wajdeczko 99 27.50% 10 41.67%
Anusha Srivatsa 84 23.33% 2 8.33%
Sagar Arun Kamble 28 7.78% 2 8.33%
Arkadiusz Hiler 12 3.33% 1 4.17%
Fernando Pacheco 4 1.11% 1 4.17%
Matt Roper 1 0.28% 1 4.17%
Total 360 24 


/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2014-2019 Intel Corporation
 */

#ifndef _INTEL_HUC_H_
#define _INTEL_HUC_H_

#include "i915_reg_defs.h"
#include "i915_sw_fence.h"
#include "intel_uc_fw.h"
#include "intel_huc_fw.h"

#include <linux/notifier.h>
#include <linux/hrtimer.h>

struct bus_type;

enum intel_huc_delayed_load_status {
	INTEL_HUC_WAITING_ON_GSC = 0,
	INTEL_HUC_WAITING_ON_PXP,
	INTEL_HUC_DELAYED_LOAD_ERROR,
};

struct intel_huc {
	/* Generic uC firmware management */
	struct intel_uc_fw fw;

	/* HuC-specific additions */
	struct {
		i915_reg_t reg;
		u32 mask;
		u32 value;
	} status;

	struct {
		struct i915_sw_fence fence;
		struct hrtimer timer;
		struct notifier_block nb;
		enum intel_huc_delayed_load_status status;
	} delayed_load;
};

void intel_huc_init_early(struct intel_huc *huc);
int intel_huc_init(struct intel_huc *huc);
void intel_huc_fini(struct intel_huc *huc);
void intel_huc_suspend(struct intel_huc *huc);
int intel_huc_auth(struct intel_huc *huc);
int intel_huc_wait_for_auth_complete(struct intel_huc *huc);
int intel_huc_check_status(struct intel_huc *huc);
void intel_huc_update_auth_status(struct intel_huc *huc);
bool intel_huc_is_authenticated(struct intel_huc *huc);

void intel_huc_register_gsc_notifier(struct intel_huc *huc, struct bus_type *bus);
void intel_huc_unregister_gsc_notifier(struct intel_huc *huc, struct bus_type *bus);

static inline int intel_huc_sanitize(struct intel_huc *huc)
{
	intel_uc_fw_sanitize(&huc->fw);
	return 0;
}

static inline bool intel_huc_is_supported(struct intel_huc *huc)
{
	return intel_uc_fw_is_supported(&huc->fw);
}

static inline bool intel_huc_is_wanted(struct intel_huc *huc)
{
	return intel_uc_fw_is_enabled(&huc->fw);
}

static inline bool intel_huc_is_used(struct intel_huc *huc)
{
	GEM_BUG_ON(__intel_uc_fw_status(&huc->fw) == INTEL_UC_FIRMWARE_SELECTED);
	return intel_uc_fw_is_available(&huc->fw);
}

static inline bool intel_huc_is_loaded_by_gsc(const struct intel_huc *huc)
{
	return huc->fw.loaded_via_gsc;
}

static inline bool intel_huc_wait_required(struct intel_huc *huc)
{
	return intel_huc_is_used(huc) && intel_huc_is_loaded_by_gsc(huc) &&
	       !intel_huc_is_authenticated(huc);
}

void intel_huc_load_status(struct intel_huc *huc, struct drm_printer *p);

#endif