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Merge branch 'core-objtool-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-block.git] / drivers / gpu / drm / amd / display / modules / hdcp / hdcp2_execution.c
CommitLineData
51466b3f
BL		 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
4e328922
AD		 26#include <linux/delay.h>
27
51466b3f
BL		 28#include "hdcp.h"
29
30static inline enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp)
31{
32 uint8_t is_ready = 0;
33
34 if (is_dp_hdcp(hdcp))
30216900 35 is_ready = HDCP_2_2_DP_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 1 : 0;
51466b3f 36 else
30216900
BL		 37 is_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus[0]) &&
38 (HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
39 hdcp->auth.msg.hdcp2.rxstatus[0])) ? 1 : 0;
51466b3f
BL		 40 return is_ready ? MOD_HDCP_STATUS_SUCCESS :
41 MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
42}
43
44static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp)
45{
46 enum mod_hdcp_status status;
47
48 if (is_dp_hdcp(hdcp))
43064f5c
BL		 49 status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) &&
50 HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ?
51466b3f
BL		 51 MOD_HDCP_STATUS_SUCCESS :
52 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
53 else
02837a91 54 status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & HDCP_2_2_HDMI_SUPPORT_MASK) ?
51466b3f
BL		 55 MOD_HDCP_STATUS_SUCCESS :
56 MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE;
57 return status;
58}
59
60static inline enum mod_hdcp_status check_reauthentication_request(
61 struct mod_hdcp *hdcp)
62{
63 uint8_t ret = 0;
64
65 if (is_dp_hdcp(hdcp))
30216900 66 ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
51466b3f
BL		 67 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
68 MOD_HDCP_STATUS_SUCCESS;
69 else
30216900 70 ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[0]) ?
51466b3f
BL		 71 MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST :
72 MOD_HDCP_STATUS_SUCCESS;
73 return ret;
74}
75
76static inline enum mod_hdcp_status check_link_integrity_failure_dp(
77 struct mod_hdcp *hdcp)
78{
30216900 79 return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
51466b3f
BL		 80 MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE :
81 MOD_HDCP_STATUS_SUCCESS;
82}
83
84static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp)
85{
86 enum mod_hdcp_status status;
87 uint16_t size;
88
89 if (is_dp_hdcp(hdcp)) {
90 status = MOD_HDCP_STATUS_SUCCESS;
91 } else {
92 status = mod_hdcp_read_rxstatus(hdcp);
93 if (status == MOD_HDCP_STATUS_SUCCESS) {
30216900
BL		 94 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
95 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 96 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ?
97 MOD_HDCP_STATUS_SUCCESS :
98 MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING;
99 }
100 }
101 return status;
102}
103
104static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp)
105{
106 enum mod_hdcp_status status;
107 uint8_t size;
108
109 status = mod_hdcp_read_rxstatus(hdcp);
110 if (status != MOD_HDCP_STATUS_SUCCESS)
111 goto out;
112
113 if (is_dp_hdcp(hdcp)) {
30216900 114 status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
51466b3f
BL		 115 MOD_HDCP_STATUS_SUCCESS :
116 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
117 } else {
30216900
BL		 118 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
119 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 120 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ?
121 MOD_HDCP_STATUS_SUCCESS :
122 MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING;
123 }
124out:
125 return status;
126}
127
128static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp)
129{
130 enum mod_hdcp_status status;
131 uint8_t size;
132
133 status = mod_hdcp_read_rxstatus(hdcp);
134 if (status != MOD_HDCP_STATUS_SUCCESS)
135 goto out;
136
137 if (is_dp_hdcp(hdcp)) {
30216900 138 status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ?
51466b3f
BL		 139 MOD_HDCP_STATUS_SUCCESS :
140 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
141 } else {
30216900
BL		 142 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
143 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 144 status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ?
145 MOD_HDCP_STATUS_SUCCESS :
146 MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING;
147 }
148out:
149 return status;
150}
151
152static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp)
153{
154 enum mod_hdcp_status status;
155 uint8_t size;
5f773e55 156 uint16_t max_wait = 20; // units of ms
51466b3f
BL		 157 uint16_t num_polls = 5;
158 uint16_t wait_time = max_wait / num_polls;
159
160 if (is_dp_hdcp(hdcp))
161 status = MOD_HDCP_STATUS_INVALID_OPERATION;
162 else
163 for (; num_polls; num_polls--) {
5f773e55 164 msleep(wait_time);
51466b3f
BL		 165
166 status = mod_hdcp_read_rxstatus(hdcp);
167 if (status != MOD_HDCP_STATUS_SUCCESS)
168 break;
169
30216900
BL		 170 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
171 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 172 status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ?
173 MOD_HDCP_STATUS_SUCCESS :
174 MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING;
175 if (status == MOD_HDCP_STATUS_SUCCESS)
176 break;
177 }
178 return status;
179}
180
181static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp)
182{
183 enum mod_hdcp_status status;
184 uint8_t size;
185
186 if (is_dp_hdcp(hdcp)) {
187 status = MOD_HDCP_STATUS_INVALID_OPERATION;
188 } else {
189 status = mod_hdcp_read_rxstatus(hdcp);
190 if (status != MOD_HDCP_STATUS_SUCCESS)
191 goto out;
30216900
BL		 192 size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
193 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 194 status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ?
195 MOD_HDCP_STATUS_SUCCESS :
196 MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING;
197 }
198out:
199 return status;
200}
201
202static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
203{
02837a91
BL		 204 return HDCP_2_2_DEV_COUNT_LO(hdcp->auth.msg.hdcp2.rx_id_list[2]) +
205 (HDCP_2_2_DEV_COUNT_HI(hdcp->auth.msg.hdcp2.rx_id_list[1]) << 4);
51466b3f
BL		 206}
207
208static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
209{
210 /* device count must be greater than or equal to tracked hdcp displays */
211 return (get_device_count(hdcp) < get_added_display_count(hdcp)) ?
212 MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE :
213 MOD_HDCP_STATUS_SUCCESS;
214}
215
216static uint8_t process_rxstatus(struct mod_hdcp *hdcp,
217 struct mod_hdcp_event_context *event_ctx,
218 struct mod_hdcp_transition_input_hdcp2 *input,
219 enum mod_hdcp_status *status)
220{
221 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus,
222 &input->rxstatus_read, status,
223 hdcp, "rxstatus_read"))
224 goto out;
225 if (!mod_hdcp_execute_and_set(check_reauthentication_request,
226 &input->reauth_request_check, status,
227 hdcp, "reauth_request_check"))
228 goto out;
229 if (is_dp_hdcp(hdcp)) {
230 if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp,
231 &input->link_integrity_check_dp, status,
232 hdcp, "link_integrity_check_dp"))
233 goto out;
234 }
235 if (hdcp->connection.is_repeater)
236 if (check_receiver_id_list_ready(hdcp) ==
237 MOD_HDCP_STATUS_SUCCESS) {
238 HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready");
239 event_ctx->rx_id_list_ready = 1;
240 if (is_dp_hdcp(hdcp))
241 hdcp->auth.msg.hdcp2.rx_id_list_size =
242 sizeof(hdcp->auth.msg.hdcp2.rx_id_list);
243 else
244 hdcp->auth.msg.hdcp2.rx_id_list_size =
30216900
BL		 245 HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 |
246 hdcp->auth.msg.hdcp2.rxstatus[0];
51466b3f
BL		 247 }
248out:
249 return (*status == MOD_HDCP_STATUS_SUCCESS);
250}
251
252static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp,
253 struct mod_hdcp_event_context *event_ctx,
254 struct mod_hdcp_transition_input_hdcp2 *input)
255{
256 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
257
258 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
259 event_ctx->unexpected_event = 1;
260 goto out;
261 }
262 if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version,
263 &input->hdcp2version_read, &status,
264 hdcp, "hdcp2version_read"))
265 goto out;
266 if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
267 &input->hdcp2_capable_check, &status,
268 hdcp, "hdcp2_capable"))
269 goto out;
270out:
271 return status;
272}
273
274static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp,
275 struct mod_hdcp_event_context *event_ctx,
276 struct mod_hdcp_transition_input_hdcp2 *input)
277{
278 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
279
280 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
281 event_ctx->unexpected_event = 1;
282 goto out;
283 }
284 if (!mod_hdcp_execute_and_set(mod_hdcp_add_display_topology,
285 &input->add_topology, &status,
286 hdcp, "add_topology"))
287 goto out;
288 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session,
289 &input->create_session, &status,
290 hdcp, "create_session"))
291 goto out;
292 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init,
293 &input->ake_init_prepare, &status,
294 hdcp, "ake_init_prepare"))
295 goto out;
296 if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init,
297 &input->ake_init_write, &status,
298 hdcp, "ake_init_write"))
299 goto out;
300out:
301 return status;
302}
303
304static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp,
305 struct mod_hdcp_event_context *event_ctx,
306 struct mod_hdcp_transition_input_hdcp2 *input)
307{
308 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
309
310
311 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
312 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
313 event_ctx->unexpected_event = 1;
314 goto out;
315 }
316
317 if (is_hdmi_dvi_sl_hdcp(hdcp))
318 if (!mod_hdcp_execute_and_set(check_ake_cert_available,
319 &input->ake_cert_available, &status,
320 hdcp, "ake_cert_available"))
321 goto out;
322 if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert,
323 &input->ake_cert_read, &status,
324 hdcp, "ake_cert_read"))
325 goto out;
326 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert,
327 &input->ake_cert_validation, &status,
328 hdcp, "ake_cert_validation"))
329 goto out;
330out:
331 return status;
332}
333
334static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp,
335 struct mod_hdcp_event_context *event_ctx,
336 struct mod_hdcp_transition_input_hdcp2 *input)
337{
338 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
339
340 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
341 event_ctx->unexpected_event = 1;
342 goto out;
343 }
344
345 if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km,
346 &input->no_stored_km_write, &status,
347 hdcp, "no_stored_km_write"))
348 goto out;
349out:
350 return status;
351}
352
353static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp,
354 struct mod_hdcp_event_context *event_ctx,
355 struct mod_hdcp_transition_input_hdcp2 *input)
356{
357 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
358
359 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
360 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
361 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
362 event_ctx->unexpected_event = 1;
363 goto out;
364 }
365
366 if (!mod_hdcp_execute_and_set(check_h_prime_available,
367 &input->h_prime_available, &status,
368 hdcp, "h_prime_available"))
369 goto out;
370
371 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
372 &input->h_prime_read, &status,
373 hdcp, "h_prime_read"))
374 goto out;
375out:
376 return status;
377}
378
379static enum mod_hdcp_status read_pairing_info_and_validate_h_prime(
380 struct mod_hdcp *hdcp,
381 struct mod_hdcp_event_context *event_ctx,
382 struct mod_hdcp_transition_input_hdcp2 *input)
383{
384 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
385
386 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
387 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
388 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
389 event_ctx->unexpected_event = 1;
390 goto out;
391 }
392
393 if (!mod_hdcp_execute_and_set(check_pairing_info_available,
394 &input->pairing_available, &status,
395 hdcp, "pairing_available"))
396 goto out;
397 if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info,
398 &input->pairing_info_read, &status,
399 hdcp, "pairing_info_read"))
400 goto out;
401 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
402 &input->h_prime_validation, &status,
403 hdcp, "h_prime_validation"))
404 goto out;
405out:
406 return status;
407}
408
409static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp,
410 struct mod_hdcp_event_context *event_ctx,
411 struct mod_hdcp_transition_input_hdcp2 *input)
412{
413 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
414
415 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
416 event_ctx->unexpected_event = 1;
417 goto out;
418 }
419
420 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km,
421 &input->stored_km_write, &status,
422 hdcp, "stored_km_write"))
423 goto out;
424out:
425 return status;
426}
427
428static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp,
429 struct mod_hdcp_event_context *event_ctx,
430 struct mod_hdcp_transition_input_hdcp2 *input)
431{
432 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
433
434 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
435 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
436 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
437 event_ctx->unexpected_event = 1;
438 goto out;
439 }
440
441 if (!mod_hdcp_execute_and_set(check_h_prime_available,
442 &input->h_prime_available, &status,
443 hdcp, "h_prime_available"))
444 goto out;
445 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime,
446 &input->h_prime_read, &status,
447 hdcp, "h_prime_read"))
448 goto out;
449 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime,
450 &input->h_prime_validation, &status,
451 hdcp, "h_prime_validation"))
452 goto out;
453out:
454 return status;
455}
456
457static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp,
458 struct mod_hdcp_event_context *event_ctx,
459 struct mod_hdcp_transition_input_hdcp2 *input)
460{
461 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
462
463 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
464 event_ctx->unexpected_event = 1;
465 goto out;
466 }
467
468 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init,
469 &input->lc_init_prepare, &status,
470 hdcp, "lc_init_prepare"))
471 goto out;
472 if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init,
473 &input->lc_init_write, &status,
474 hdcp, "lc_init_write"))
475 goto out;
476 if (is_dp_hdcp(hdcp))
5f773e55 477 msleep(16);
51466b3f
BL		 478 else
479 if (!mod_hdcp_execute_and_set(poll_l_prime_available,
480 &input->l_prime_available_poll, &status,
481 hdcp, "l_prime_available_poll"))
482 goto out;
483 if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime,
484 &input->l_prime_read, &status,
485 hdcp, "l_prime_read"))
486 goto out;
487 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime,
488 &input->l_prime_validation, &status,
489 hdcp, "l_prime_validation"))
490 goto out;
491out:
492 return status;
493}
494
495static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp,
496 struct mod_hdcp_event_context *event_ctx,
497 struct mod_hdcp_transition_input_hdcp2 *input)
498{
499 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
500
501 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
502 event_ctx->unexpected_event = 1;
503 goto out;
504 }
505
506 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks,
507 &input->eks_prepare, &status,
508 hdcp, "eks_prepare"))
509 goto out;
510 if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks,
511 &input->eks_write, &status,
512 hdcp, "eks_write"))
513 goto out;
514out:
515 return status;
516}
517
518static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp,
519 struct mod_hdcp_event_context *event_ctx,
520 struct mod_hdcp_transition_input_hdcp2 *input)
521{
522 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
523
524 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
525 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
526 event_ctx->unexpected_event = 1;
527 goto out;
528 }
529 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
530 process_rxstatus(hdcp, event_ctx, input, &status);
531 goto out;
532 }
533
534 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
535 if (!process_rxstatus(hdcp, event_ctx, input, &status))
536 goto out;
537 if (event_ctx->rx_id_list_ready)
538 goto out;
539 }
540 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption,
541 &input->enable_encryption, &status,
542 hdcp, "enable_encryption"))
543 goto out;
544 if (is_dp_mst_hdcp(hdcp)) {
545 if (!mod_hdcp_execute_and_set(
546 mod_hdcp_hdcp2_enable_dp_stream_encryption,
547 &input->stream_encryption_dp, &status,
548 hdcp, "stream_encryption_dp"))
549 goto out;
550 }
551out:
552 return status;
553}
554
555static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
556 struct mod_hdcp_event_context *event_ctx,
557 struct mod_hdcp_transition_input_hdcp2 *input)
558{
559 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
560
561 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
562 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
563 event_ctx->unexpected_event = 1;
564 goto out;
565 }
566
567 if (!process_rxstatus(hdcp, event_ctx, input, &status))
568 goto out;
569 if (event_ctx->rx_id_list_ready)
570 goto out;
571out:
572 return status;
573}
574
575static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp,
576 struct mod_hdcp_event_context *event_ctx,
577 struct mod_hdcp_transition_input_hdcp2 *input)
578{
579 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
580
581 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
582 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
583 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
584 event_ctx->unexpected_event = 1;
585 goto out;
586 }
587
588 if (!process_rxstatus(hdcp, event_ctx, input, &status))
589 goto out;
590 if (!event_ctx->rx_id_list_ready) {
591 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY;
592 goto out;
593 }
594out:
595 return status;
596}
597
598static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp,
599 struct mod_hdcp_event_context *event_ctx,
600 struct mod_hdcp_transition_input_hdcp2 *input)
601{
602 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
603
604 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
605 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
606 event_ctx->unexpected_event = 1;
607 goto out;
608 }
609 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
610 process_rxstatus(hdcp, event_ctx, input, &status);
611 goto out;
612 }
613
614 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list,
615 &input->rx_id_list_read,
616 &status, hdcp, "receiver_id_list_read"))
617 goto out;
618 if (!mod_hdcp_execute_and_set(check_device_count,
619 &input->device_count_check,
620 &status, hdcp, "device_count_check"))
621 goto out;
622 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list,
623 &input->rx_id_list_validation,
624 &status, hdcp, "rx_id_list_validation"))
625 goto out;
626 if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack,
627 &input->repeater_auth_ack_write,
628 &status, hdcp, "repeater_auth_ack_write"))
629 goto out;
630out:
631 return status;
632}
633
634static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp,
635 struct mod_hdcp_event_context *event_ctx,
636 struct mod_hdcp_transition_input_hdcp2 *input)
637{
638 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
639
640 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
641 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
642 event_ctx->unexpected_event = 1;
643 goto out;
644 }
645 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
646 process_rxstatus(hdcp, event_ctx, input, &status);
647 goto out;
648 }
649
650 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
651 if (!process_rxstatus(hdcp, event_ctx, input, &status))
652 goto out;
653 if (event_ctx->rx_id_list_ready)
654 goto out;
655 }
656 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management,
657 &input->prepare_stream_manage,
658 &status, hdcp, "prepare_stream_manage"))
659 goto out;
660
661 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage,
662 &input->stream_manage_write,
663 &status, hdcp, "stream_manage_write"))
664 goto out;
665out:
666 return status;
667}
668
669static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp,
670 struct mod_hdcp_event_context *event_ctx,
671 struct mod_hdcp_transition_input_hdcp2 *input)
672{
673 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
674
675 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
676 event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
677 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
678 event_ctx->unexpected_event = 1;
679 goto out;
680 }
681 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) {
682 process_rxstatus(hdcp, event_ctx, input, &status);
683 goto out;
684 }
685
686 if (is_hdmi_dvi_sl_hdcp(hdcp)) {
687 if (!process_rxstatus(hdcp, event_ctx, input, &status))
688 goto out;
689 if (event_ctx->rx_id_list_ready) {
690 goto out;
691 }
692 }
693 if (is_hdmi_dvi_sl_hdcp(hdcp))
694 if (!mod_hdcp_execute_and_set(check_stream_ready_available,
695 &input->stream_ready_available,
696 &status, hdcp, "stream_ready_available"))
697 goto out;
698 if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready,
699 &input->stream_ready_read,
700 &status, hdcp, "stream_ready_read"))
701 goto out;
702 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready,
703 &input->stream_ready_validation,
704 &status, hdcp, "stream_ready_validation"))
705 goto out;
706
707out:
708 return status;
709}
710
711static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
712 struct mod_hdcp_event_context *event_ctx,
713 struct mod_hdcp_transition_input_hdcp2 *input)
714{
715 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
716
717 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
718 event_ctx->unexpected_event = 1;
719 goto out;
720 }
721
722 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps,
723 &input->rx_caps_read_dp,
724 &status, hdcp, "rx_caps_read_dp"))
725 goto out;
726 if (!mod_hdcp_execute_and_set(check_hdcp2_capable,
727 &input->hdcp2_capable_check, &status,
728 hdcp, "hdcp2_capable_check"))
729 goto out;
730out:
731 return status;
732}
733
734static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp,
735 struct mod_hdcp_event_context *event_ctx,
736 struct mod_hdcp_transition_input_hdcp2 *input)
737{
738 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
739
740 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
741 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
742 event_ctx->unexpected_event = 1;
743 goto out;
744 }
745
746 if (!process_rxstatus(hdcp, event_ctx, input, &status))
747 goto out;
748 if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type,
749 &input->content_stream_type_write, &status,
750 hdcp, "content_stream_type_write"))
751 goto out;
752out:
753 return status;
754}
755
756enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp,
757 struct mod_hdcp_event_context *event_ctx,
758 struct mod_hdcp_transition_input_hdcp2 *input)
759{
760 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
761
762 switch (current_state(hdcp)) {
763 case H2_A0_KNOWN_HDCP2_CAPABLE_RX:
764 status = known_hdcp2_capable_rx(hdcp, event_ctx, input);
765 break;
766 case H2_A1_SEND_AKE_INIT:
767 status = send_ake_init(hdcp, event_ctx, input);
768 break;
769 case H2_A1_VALIDATE_AKE_CERT:
770 status = validate_ake_cert(hdcp, event_ctx, input);
771 break;
772 case H2_A1_SEND_NO_STORED_KM:
773 status = send_no_stored_km(hdcp, event_ctx, input);
774 break;
775 case H2_A1_READ_H_PRIME:
776 status = read_h_prime(hdcp, event_ctx, input);
777 break;
778 case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
779 status = read_pairing_info_and_validate_h_prime(hdcp,
780 event_ctx, input);
781 break;
782 case H2_A1_SEND_STORED_KM:
783 status = send_stored_km(hdcp, event_ctx, input);
784 break;
785 case H2_A1_VALIDATE_H_PRIME:
786 status = validate_h_prime(hdcp, event_ctx, input);
787 break;
788 case H2_A2_LOCALITY_CHECK:
789 status = locality_check(hdcp, event_ctx, input);
790 break;
791 case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
792 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input);
793 break;
794 case H2_ENABLE_ENCRYPTION:
795 status = enable_encryption(hdcp, event_ctx, input);
796 break;
797 case H2_A5_AUTHENTICATED:
798 status = authenticated(hdcp, event_ctx, input);
799 break;
800 case H2_A6_WAIT_FOR_RX_ID_LIST:
801 status = wait_for_rx_id_list(hdcp, event_ctx, input);
802 break;
803 case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
804 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
805 break;
806 case H2_A9_SEND_STREAM_MANAGEMENT:
807 status = send_stream_management(hdcp, event_ctx, input);
808 break;
809 case H2_A9_VALIDATE_STREAM_READY:
810 status = validate_stream_ready(hdcp, event_ctx, input);
811 break;
812 default:
813 status = MOD_HDCP_STATUS_INVALID_STATE;
814 break;
815 }
816
817 return status;
818}
819
820enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp,
821 struct mod_hdcp_event_context *event_ctx,
822 struct mod_hdcp_transition_input_hdcp2 *input)
823{
824 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
825
826 switch (current_state(hdcp)) {
827 case D2_A0_DETERMINE_RX_HDCP_CAPABLE:
828 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input);
829 break;
830 case D2_A1_SEND_AKE_INIT:
831 status = send_ake_init(hdcp, event_ctx, input);
832 break;
833 case D2_A1_VALIDATE_AKE_CERT:
834 status = validate_ake_cert(hdcp, event_ctx, input);
835 break;
836 case D2_A1_SEND_NO_STORED_KM:
837 status = send_no_stored_km(hdcp, event_ctx, input);
838 break;
839 case D2_A1_READ_H_PRIME:
840 status = read_h_prime(hdcp, event_ctx, input);
841 break;
842 case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME:
843 status = read_pairing_info_and_validate_h_prime(hdcp,
844 event_ctx, input);
845 break;
846 case D2_A1_SEND_STORED_KM:
847 status = send_stored_km(hdcp, event_ctx, input);
848 break;
849 case D2_A1_VALIDATE_H_PRIME:
850 status = validate_h_prime(hdcp, event_ctx, input);
851 break;
852 case D2_A2_LOCALITY_CHECK:
853 status = locality_check(hdcp, event_ctx, input);
854 break;
855 case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER:
856 status = exchange_ks_and_test_for_repeater(hdcp,
857 event_ctx, input);
858 break;
859 case D2_SEND_CONTENT_STREAM_TYPE:
860 status = send_content_stream_type_dp(hdcp, event_ctx, input);
861 break;
862 case D2_ENABLE_ENCRYPTION:
863 status = enable_encryption(hdcp, event_ctx, input);
864 break;
865 case D2_A5_AUTHENTICATED:
866 status = authenticated(hdcp, event_ctx, input);
867 break;
868 case D2_A6_WAIT_FOR_RX_ID_LIST:
869 status = wait_for_rx_id_list(hdcp, event_ctx, input);
870 break;
871 case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK:
872 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input);
873 break;
874 case D2_A9_SEND_STREAM_MANAGEMENT:
875 status = send_stream_management(hdcp, event_ctx, input);
876 break;
877 case D2_A9_VALIDATE_STREAM_READY:
878 status = validate_stream_ready(hdcp, event_ctx, input);
879 break;
880 default:
881 status = MOD_HDCP_STATUS_INVALID_STATE;
882 break;
883 }
884
885 return status;
886}
Linux 6.x block layer and io_uring tree(s)