1 /* SPDX-License-Identifier: MIT */
2 /*
3 * Copyright © 2014-2019 Intel Corporation
4 */
5
6 #ifndef _INTEL_HUC_H_
7 #define _INTEL_HUC_H_
8
9 #include "i915_reg_defs.h"
10 #include "i915_sw_fence.h"
11 #include "intel_uc_fw.h"
12 #include "intel_huc_fw.h"
13
14 #include <linux/notifier.h>
15 #include <linux/hrtimer.h>
16
17 struct bus_type;
18 struct i915_vma;
19
20 enum intel_huc_delayed_load_status {
21 INTEL_HUC_WAITING_ON_GSC = 0,
22 INTEL_HUC_WAITING_ON_PXP,
23 INTEL_HUC_DELAYED_LOAD_ERROR,
24 };
25
26 enum intel_huc_authentication_type {
27 INTEL_HUC_AUTH_BY_GUC = 0,
28 INTEL_HUC_AUTH_BY_GSC,
29 INTEL_HUC_AUTH_MAX_MODES
30 };
31
32 struct intel_huc {
33 /* Generic uC firmware management */
34 struct intel_uc_fw fw;
35
36 /* HuC-specific additions */
37 struct {
38 i915_reg_t reg;
39 u32 mask;
40 u32 value;
41 } status[INTEL_HUC_AUTH_MAX_MODES];
42
43 struct {
44 struct i915_sw_fence fence;
45 struct hrtimer timer;
46 struct notifier_block nb;
47 enum intel_huc_delayed_load_status status;
48 } delayed_load;
49
50 /* for load via GSCCS */
51 struct i915_vma *heci_pkt;
52
53 bool loaded_via_gsc;
54 };
55
56 int intel_huc_sanitize(struct intel_huc *huc);
57 void intel_huc_init_early(struct intel_huc *huc);
58 int intel_huc_init(struct intel_huc *huc);
59 void intel_huc_fini(struct intel_huc *huc);
60 int intel_huc_auth(struct intel_huc *huc, enum intel_huc_authentication_type type);
61 int intel_huc_wait_for_auth_complete(struct intel_huc *huc,
62 enum intel_huc_authentication_type type);
63 bool intel_huc_is_authenticated(struct intel_huc *huc,
64 enum intel_huc_authentication_type type);
65 int intel_huc_check_status(struct intel_huc *huc);
66 void intel_huc_update_auth_status(struct intel_huc *huc);
67
68 void intel_huc_register_gsc_notifier(struct intel_huc *huc, const struct bus_type *bus);
69 void intel_huc_unregister_gsc_notifier(struct intel_huc *huc, const struct bus_type *bus);
70
intel_huc_is_supported(struct intel_huc * huc)71 static inline bool intel_huc_is_supported(struct intel_huc *huc)
72 {
73 return intel_uc_fw_is_supported(&huc->fw);
74 }
75
intel_huc_is_wanted(struct intel_huc * huc)76 static inline bool intel_huc_is_wanted(struct intel_huc *huc)
77 {
78 return intel_uc_fw_is_enabled(&huc->fw);
79 }
80
intel_huc_is_used(struct intel_huc * huc)81 static inline bool intel_huc_is_used(struct intel_huc *huc)
82 {
83 GEM_BUG_ON(__intel_uc_fw_status(&huc->fw) == INTEL_UC_FIRMWARE_SELECTED);
84 return intel_uc_fw_is_available(&huc->fw);
85 }
86
intel_huc_is_loaded_by_gsc(const struct intel_huc * huc)87 static inline bool intel_huc_is_loaded_by_gsc(const struct intel_huc *huc)
88 {
89 return huc->loaded_via_gsc;
90 }
91
intel_huc_wait_required(struct intel_huc * huc)92 static inline bool intel_huc_wait_required(struct intel_huc *huc)
93 {
94 return intel_huc_is_used(huc) && intel_huc_is_loaded_by_gsc(huc) &&
95 !intel_huc_is_authenticated(huc, INTEL_HUC_AUTH_BY_GSC);
96 }
97
98 void intel_huc_load_status(struct intel_huc *huc, struct drm_printer *p);
99
100 #endif
101