drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c

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