1 /*
2  * Copyright 2018 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: AMD
23  *
24  */
25 
26 #ifndef MOD_HDCP_H_
27 #define MOD_HDCP_H_
28 
29 #include "os_types.h"
30 #include "signal_types.h"
31 
32 /* Forward Declarations */
33 struct mod_hdcp;
34 
35 #define MAX_NUM_OF_DISPLAYS 6
36 #define MAX_NUM_OF_ATTEMPTS 4
37 #define MAX_NUM_OF_ERROR_TRACE 10
38 
39 /* detailed return status */
40 enum mod_hdcp_status {
41 	MOD_HDCP_STATUS_SUCCESS = 0,
42 	MOD_HDCP_STATUS_FAILURE,
43 	MOD_HDCP_STATUS_RESET_NEEDED,
44 	MOD_HDCP_STATUS_DISPLAY_OUT_OF_BOUND,
45 	MOD_HDCP_STATUS_DISPLAY_NOT_FOUND,
46 	MOD_HDCP_STATUS_INVALID_STATE,
47 	MOD_HDCP_STATUS_NOT_IMPLEMENTED,
48 	MOD_HDCP_STATUS_INTERNAL_POLICY_FAILURE,
49 	MOD_HDCP_STATUS_UPDATE_TOPOLOGY_FAILURE,
50 	MOD_HDCP_STATUS_CREATE_PSP_SERVICE_FAILURE,
51 	MOD_HDCP_STATUS_DESTROY_PSP_SERVICE_FAILURE,
52 	MOD_HDCP_STATUS_HDCP1_CREATE_SESSION_FAILURE,
53 	MOD_HDCP_STATUS_HDCP1_DESTROY_SESSION_FAILURE,
54 	MOD_HDCP_STATUS_HDCP1_VALIDATE_ENCRYPTION_FAILURE,
55 	MOD_HDCP_STATUS_HDCP1_NOT_HDCP_REPEATER,
56 	MOD_HDCP_STATUS_HDCP1_NOT_CAPABLE,
57 	MOD_HDCP_STATUS_HDCP1_R0_PRIME_PENDING,
58 	MOD_HDCP_STATUS_HDCP1_VALIDATE_RX_FAILURE,
59 	MOD_HDCP_STATUS_HDCP1_BKSV_REVOKED,
60 	MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY,
61 	MOD_HDCP_STATUS_HDCP1_VALIDATE_KSV_LIST_FAILURE,
62 	MOD_HDCP_STATUS_HDCP1_KSV_LIST_REVOKED,
63 	MOD_HDCP_STATUS_HDCP1_ENABLE_ENCRYPTION_FAILURE,
64 	MOD_HDCP_STATUS_HDCP1_ENABLE_STREAM_ENCRYPTION_FAILURE,
65 	MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE,
66 	MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE,
67 	MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE,
68 	MOD_HDCP_STATUS_HDCP1_LINK_INTEGRITY_FAILURE,
69 	MOD_HDCP_STATUS_HDCP1_REAUTH_REQUEST_ISSUED,
70 	MOD_HDCP_STATUS_HDCP1_LINK_MAINTENANCE_FAILURE,
71 	MOD_HDCP_STATUS_HDCP1_INVALID_BKSV,
72 	MOD_HDCP_STATUS_DDC_FAILURE, /* TODO: specific errors */
73 	MOD_HDCP_STATUS_INVALID_OPERATION,
74 	MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE,
75 	MOD_HDCP_STATUS_HDCP2_CREATE_SESSION_FAILURE,
76 	MOD_HDCP_STATUS_HDCP2_DESTROY_SESSION_FAILURE,
77 	MOD_HDCP_STATUS_HDCP2_PREP_AKE_INIT_FAILURE,
78 	MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING,
79 	MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING,
80 	MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING,
81 	MOD_HDCP_STATUS_HDCP2_VALIDATE_AKE_CERT_FAILURE,
82 	MOD_HDCP_STATUS_HDCP2_AKE_CERT_REVOKED,
83 	MOD_HDCP_STATUS_HDCP2_VALIDATE_H_PRIME_FAILURE,
84 	MOD_HDCP_STATUS_HDCP2_VALIDATE_PAIRING_INFO_FAILURE,
85 	MOD_HDCP_STATUS_HDCP2_PREP_LC_INIT_FAILURE,
86 	MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING,
87 	MOD_HDCP_STATUS_HDCP2_VALIDATE_L_PRIME_FAILURE,
88 	MOD_HDCP_STATUS_HDCP2_PREP_EKS_FAILURE,
89 	MOD_HDCP_STATUS_HDCP2_ENABLE_ENCRYPTION_FAILURE,
90 	MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY,
91 	MOD_HDCP_STATUS_HDCP2_VALIDATE_RX_ID_LIST_FAILURE,
92 	MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_REVOKED,
93 	MOD_HDCP_STATUS_HDCP2_ENABLE_STREAM_ENCRYPTION_FAILURE,
94 	MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING,
95 	MOD_HDCP_STATUS_HDCP2_VALIDATE_STREAM_READY_FAILURE,
96 	MOD_HDCP_STATUS_HDCP2_PREPARE_STREAM_MANAGEMENT_FAILURE,
97 	MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST,
98 	MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE,
99 	MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE,
100 	MOD_HDCP_STATUS_UNSUPPORTED_PSP_VER_FAILURE,
101 };
102 
103 struct mod_hdcp_displayport {
104 	uint8_t rev;
105 	uint8_t assr_enabled;
106 	uint8_t mst_enabled;
107 	uint8_t usb4_enabled;
108 };
109 
110 struct mod_hdcp_hdmi {
111 	uint8_t reserved;
112 };
113 enum mod_hdcp_operation_mode {
114 	MOD_HDCP_MODE_OFF,
115 	MOD_HDCP_MODE_DEFAULT,
116 	MOD_HDCP_MODE_DP
117 };
118 
119 enum mod_hdcp_display_state {
120 	MOD_HDCP_DISPLAY_INACTIVE = 0,
121 	MOD_HDCP_DISPLAY_ACTIVE,
122 	MOD_HDCP_DISPLAY_ENCRYPTION_ENABLED
123 };
124 
125 struct mod_hdcp_psp_caps {
126 	uint8_t dtm_v3_supported;
127 };
128 
129 enum mod_hdcp_display_disable_option {
130 	MOD_HDCP_DISPLAY_NOT_DISABLE = 0,
131 	MOD_HDCP_DISPLAY_DISABLE_AUTHENTICATION,
132 	MOD_HDCP_DISPLAY_DISABLE_ENCRYPTION,
133 };
134 
135 struct mod_hdcp_ddc {
136 	void *handle;
137 	struct {
138 		bool (*read_i2c)(void *handle,
139 				uint32_t address,
140 				uint8_t offset,
141 				uint8_t *data,
142 				uint32_t size);
143 		bool (*write_i2c)(void *handle,
144 				uint32_t address,
145 				const uint8_t *data,
146 				uint32_t size);
147 		bool (*read_dpcd)(void *handle,
148 				uint32_t address,
149 				uint8_t *data,
150 				uint32_t size);
151 		bool (*write_dpcd)(void *handle,
152 				uint32_t address,
153 				const uint8_t *data,
154 				uint32_t size);
155 	} funcs;
156 };
157 
158 struct mod_hdcp_psp {
159 	void *handle;
160 	void *funcs;
161 	struct mod_hdcp_psp_caps caps;
162 };
163 
164 struct mod_hdcp_display_adjustment {
165 	uint8_t disable			: 2;
166 	uint8_t reserved		: 6;
167 };
168 
169 struct mod_hdcp_link_adjustment_hdcp1 {
170 	uint8_t disable			: 1;
171 	uint8_t postpone_encryption	: 1;
172 	uint8_t min_auth_retries_wa : 1;
173 	uint8_t reserved		: 5;
174 };
175 
176 enum mod_hdcp_force_hdcp_type {
177 	MOD_HDCP_FORCE_TYPE_MAX = 0,
178 	MOD_HDCP_FORCE_TYPE_0,
179 	MOD_HDCP_FORCE_TYPE_1
180 };
181 
182 struct mod_hdcp_link_adjustment_hdcp2 {
183 	uint8_t disable			: 1;
184 	uint8_t force_type		: 2;
185 	uint8_t force_no_stored_km	: 1;
186 	uint8_t increase_h_prime_timeout: 1;
187 	uint8_t reserved		: 3;
188 };
189 
190 struct mod_hdcp_link_adjustment {
191 	uint8_t auth_delay;
192 	struct mod_hdcp_link_adjustment_hdcp1 hdcp1;
193 	struct mod_hdcp_link_adjustment_hdcp2 hdcp2;
194 };
195 
196 struct mod_hdcp_error {
197 	enum mod_hdcp_status status;
198 	uint8_t state_id;
199 };
200 
201 struct mod_hdcp_trace {
202 	struct mod_hdcp_error errors[MAX_NUM_OF_ERROR_TRACE];
203 	uint8_t error_count;
204 };
205 
206 enum mod_hdcp_encryption_status {
207 	MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF = 0,
208 	MOD_HDCP_ENCRYPTION_STATUS_HDCP1_ON,
209 	MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON,
210 	MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON,
211 	MOD_HDCP_ENCRYPTION_STATUS_HDCP2_ON
212 };
213 
214 /* per link events dm has to notify to hdcp module */
215 enum mod_hdcp_event {
216 	MOD_HDCP_EVENT_CALLBACK = 0,
217 	MOD_HDCP_EVENT_WATCHDOG_TIMEOUT,
218 	MOD_HDCP_EVENT_CPIRQ
219 };
220 
221 /* output flags from module requesting timer operations */
222 struct mod_hdcp_output {
223 	uint8_t callback_needed;
224 	uint8_t callback_stop;
225 	uint8_t watchdog_timer_needed;
226 	uint8_t watchdog_timer_stop;
227 	uint16_t callback_delay;
228 	uint16_t watchdog_timer_delay;
229 	uint8_t auth_complete;
230 };
231 
232 /* used to represent per display info */
233 struct mod_hdcp_display {
234 	enum mod_hdcp_display_state state;
235 	uint8_t index;
236 	uint8_t controller;
237 	uint8_t dig_fe;
238 	uint8_t stream_enc_idx;
239 	union {
240 		uint8_t vc_id;
241 	};
242 	struct mod_hdcp_display_adjustment adjust;
243 };
244 
245 /* used to represent per link info */
246 /* in case a link has multiple displays, they share the same link info */
247 struct mod_hdcp_link {
248 	enum mod_hdcp_operation_mode mode;
249 	uint8_t dig_be;
250 	uint8_t ddc_line;
251 	uint8_t link_enc_idx;
252 	uint8_t phy_idx;
253 	uint8_t dio_output_id;
254 	uint8_t hdcp_supported_informational;
255 	union {
256 		struct mod_hdcp_displayport dp;
257 		struct mod_hdcp_hdmi hdmi;
258 	};
259 	struct mod_hdcp_link_adjustment adjust;
260 };
261 
262 /* a query structure for a display's hdcp information */
263 struct mod_hdcp_display_query {
264 	const struct mod_hdcp_display *display;
265 	const struct mod_hdcp_link *link;
266 	const struct mod_hdcp_trace *trace;
267 	enum mod_hdcp_encryption_status encryption_status;
268 };
269 
270 /* contains values per on external display configuration change */
271 struct mod_hdcp_config {
272 	struct mod_hdcp_psp psp;
273 	struct mod_hdcp_ddc ddc;
274 	uint8_t index;
275 };
276 
277 /* dm allocates memory of mod_hdcp per dc_link on dm init based on memory size*/
278 size_t mod_hdcp_get_memory_size(void);
279 
280 /* called per link on link creation */
281 enum mod_hdcp_status mod_hdcp_setup(struct mod_hdcp *hdcp,
282 		struct mod_hdcp_config *config);
283 
284 /* called per link on link destroy */
285 enum mod_hdcp_status mod_hdcp_teardown(struct mod_hdcp *hdcp);
286 
287 /* called per display after stream is enabled */
288 enum mod_hdcp_status mod_hdcp_add_display(struct mod_hdcp *hdcp,
289 		struct mod_hdcp_link *link, struct mod_hdcp_display *display,
290 		struct mod_hdcp_output *output);
291 
292 /* called per display before stream is disabled */
293 enum mod_hdcp_status mod_hdcp_remove_display(struct mod_hdcp *hdcp,
294 		uint8_t index, struct mod_hdcp_output *output);
295 
296 /* called per display to apply new authentication adjustment */
297 enum mod_hdcp_status mod_hdcp_update_display(struct mod_hdcp *hdcp,
298 		uint8_t index,
299 		struct mod_hdcp_link_adjustment *link_adjust,
300 		struct mod_hdcp_display_adjustment *display_adjust,
301 		struct mod_hdcp_output *output);
302 
303 /* called to query hdcp information on a specific index */
304 enum mod_hdcp_status mod_hdcp_query_display(struct mod_hdcp *hdcp,
305 		uint8_t index, struct mod_hdcp_display_query *query);
306 
307 /* called per link on connectivity change */
308 enum mod_hdcp_status mod_hdcp_reset_connection(struct mod_hdcp *hdcp,
309 		struct mod_hdcp_output *output);
310 
311 /* called per link on events (i.e. callback, watchdog, CP_IRQ) */
312 enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp,
313 		enum mod_hdcp_event event, struct mod_hdcp_output *output);
314 
315 /* called to convert enum mod_hdcp_status to c string */
316 char *mod_hdcp_status_to_str(int32_t status);
317 
318 /* called to convert state id to c string */
319 char *mod_hdcp_state_id_to_str(int32_t id);
320 
321 /* called to convert signal type to operation mode */
322 enum mod_hdcp_operation_mode mod_hdcp_signal_type_to_operation_mode(
323 		enum signal_type signal);
324 #endif /* MOD_HDCP_H_ */
325