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 } 885