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 /* Some MST display may choose to report the internal panel as an HDCP RX. */ 211 /* To update this condition with 1(because the immediate repeater's internal */ 212 /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */ 213 /* Device count must be greater than or equal to tracked hdcp displays. */ 214 return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ? 215 MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE : 216 MOD_HDCP_STATUS_SUCCESS; 217 } 218 219 static uint8_t process_rxstatus(struct mod_hdcp *hdcp, 220 struct mod_hdcp_event_context *event_ctx, 221 struct mod_hdcp_transition_input_hdcp2 *input, 222 enum mod_hdcp_status *status) 223 { 224 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus, 225 &input->rxstatus_read, status, 226 hdcp, "rxstatus_read")) 227 goto out; 228 if (!mod_hdcp_execute_and_set(check_reauthentication_request, 229 &input->reauth_request_check, status, 230 hdcp, "reauth_request_check")) 231 goto out; 232 if (is_dp_hdcp(hdcp)) { 233 if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp, 234 &input->link_integrity_check_dp, status, 235 hdcp, "link_integrity_check_dp")) 236 goto out; 237 } 238 if (hdcp->connection.is_repeater) 239 if (check_receiver_id_list_ready(hdcp) == 240 MOD_HDCP_STATUS_SUCCESS) { 241 HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready"); 242 event_ctx->rx_id_list_ready = 1; 243 if (is_dp_hdcp(hdcp)) 244 hdcp->auth.msg.hdcp2.rx_id_list_size = 245 sizeof(hdcp->auth.msg.hdcp2.rx_id_list); 246 else 247 hdcp->auth.msg.hdcp2.rx_id_list_size = 248 HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | 249 hdcp->auth.msg.hdcp2.rxstatus[0]; 250 } 251 out: 252 return (*status == MOD_HDCP_STATUS_SUCCESS); 253 } 254 255 static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp, 256 struct mod_hdcp_event_context *event_ctx, 257 struct mod_hdcp_transition_input_hdcp2 *input) 258 { 259 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 260 261 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 262 event_ctx->unexpected_event = 1; 263 goto out; 264 } 265 266 if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version, 267 &input->hdcp2version_read, &status, 268 hdcp, "hdcp2version_read")) 269 goto out; 270 if (!mod_hdcp_execute_and_set(check_hdcp2_capable, 271 &input->hdcp2_capable_check, &status, 272 hdcp, "hdcp2_capable")) 273 goto out; 274 out: 275 return status; 276 } 277 278 static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp, 279 struct mod_hdcp_event_context *event_ctx, 280 struct mod_hdcp_transition_input_hdcp2 *input) 281 { 282 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 283 284 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 285 event_ctx->unexpected_event = 1; 286 goto out; 287 } 288 289 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session, 290 &input->create_session, &status, 291 hdcp, "create_session")) 292 goto out; 293 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init, 294 &input->ake_init_prepare, &status, 295 hdcp, "ake_init_prepare")) 296 goto out; 297 if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init, 298 &input->ake_init_write, &status, 299 hdcp, "ake_init_write")) 300 goto out; 301 out: 302 return status; 303 } 304 305 static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp, 306 struct mod_hdcp_event_context *event_ctx, 307 struct mod_hdcp_transition_input_hdcp2 *input) 308 { 309 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 310 311 312 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 313 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 314 event_ctx->unexpected_event = 1; 315 goto out; 316 } 317 318 if (is_hdmi_dvi_sl_hdcp(hdcp)) 319 if (!mod_hdcp_execute_and_set(check_ake_cert_available, 320 &input->ake_cert_available, &status, 321 hdcp, "ake_cert_available")) 322 goto out; 323 if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert, 324 &input->ake_cert_read, &status, 325 hdcp, "ake_cert_read")) 326 goto out; 327 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert, 328 &input->ake_cert_validation, &status, 329 hdcp, "ake_cert_validation")) 330 goto out; 331 out: 332 return status; 333 } 334 335 static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp, 336 struct mod_hdcp_event_context *event_ctx, 337 struct mod_hdcp_transition_input_hdcp2 *input) 338 { 339 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 340 341 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 342 event_ctx->unexpected_event = 1; 343 goto out; 344 } 345 346 if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km, 347 &input->no_stored_km_write, &status, 348 hdcp, "no_stored_km_write")) 349 goto out; 350 out: 351 return status; 352 } 353 354 static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp, 355 struct mod_hdcp_event_context *event_ctx, 356 struct mod_hdcp_transition_input_hdcp2 *input) 357 { 358 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 359 360 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 361 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 362 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 363 event_ctx->unexpected_event = 1; 364 goto out; 365 } 366 367 if (!mod_hdcp_execute_and_set(check_h_prime_available, 368 &input->h_prime_available, &status, 369 hdcp, "h_prime_available")) 370 goto out; 371 372 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, 373 &input->h_prime_read, &status, 374 hdcp, "h_prime_read")) 375 goto out; 376 out: 377 return status; 378 } 379 380 static enum mod_hdcp_status read_pairing_info_and_validate_h_prime( 381 struct mod_hdcp *hdcp, 382 struct mod_hdcp_event_context *event_ctx, 383 struct mod_hdcp_transition_input_hdcp2 *input) 384 { 385 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 386 387 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 388 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 389 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 390 event_ctx->unexpected_event = 1; 391 goto out; 392 } 393 394 if (!mod_hdcp_execute_and_set(check_pairing_info_available, 395 &input->pairing_available, &status, 396 hdcp, "pairing_available")) 397 goto out; 398 if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info, 399 &input->pairing_info_read, &status, 400 hdcp, "pairing_info_read")) 401 goto out; 402 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, 403 &input->h_prime_validation, &status, 404 hdcp, "h_prime_validation")) 405 goto out; 406 out: 407 return status; 408 } 409 410 static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp, 411 struct mod_hdcp_event_context *event_ctx, 412 struct mod_hdcp_transition_input_hdcp2 *input) 413 { 414 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 415 416 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 417 event_ctx->unexpected_event = 1; 418 goto out; 419 } 420 421 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km, 422 &input->stored_km_write, &status, 423 hdcp, "stored_km_write")) 424 goto out; 425 out: 426 return status; 427 } 428 429 static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp, 430 struct mod_hdcp_event_context *event_ctx, 431 struct mod_hdcp_transition_input_hdcp2 *input) 432 { 433 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 434 435 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 436 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 437 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 438 event_ctx->unexpected_event = 1; 439 goto out; 440 } 441 442 if (!mod_hdcp_execute_and_set(check_h_prime_available, 443 &input->h_prime_available, &status, 444 hdcp, "h_prime_available")) 445 goto out; 446 if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, 447 &input->h_prime_read, &status, 448 hdcp, "h_prime_read")) 449 goto out; 450 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, 451 &input->h_prime_validation, &status, 452 hdcp, "h_prime_validation")) 453 goto out; 454 out: 455 return status; 456 } 457 458 static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp, 459 struct mod_hdcp_event_context *event_ctx, 460 struct mod_hdcp_transition_input_hdcp2 *input) 461 { 462 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 463 464 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 465 event_ctx->unexpected_event = 1; 466 goto out; 467 } 468 469 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init, 470 &input->lc_init_prepare, &status, 471 hdcp, "lc_init_prepare")) 472 goto out; 473 if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init, 474 &input->lc_init_write, &status, 475 hdcp, "lc_init_write")) 476 goto out; 477 if (is_dp_hdcp(hdcp)) 478 msleep(16); 479 else 480 if (!mod_hdcp_execute_and_set(poll_l_prime_available, 481 &input->l_prime_available_poll, &status, 482 hdcp, "l_prime_available_poll")) 483 goto out; 484 if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime, 485 &input->l_prime_read, &status, 486 hdcp, "l_prime_read")) 487 goto out; 488 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime, 489 &input->l_prime_validation, &status, 490 hdcp, "l_prime_validation")) 491 goto out; 492 out: 493 return status; 494 } 495 496 static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp, 497 struct mod_hdcp_event_context *event_ctx, 498 struct mod_hdcp_transition_input_hdcp2 *input) 499 { 500 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 501 502 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 503 event_ctx->unexpected_event = 1; 504 goto out; 505 } 506 507 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks, 508 &input->eks_prepare, &status, 509 hdcp, "eks_prepare")) 510 goto out; 511 if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks, 512 &input->eks_write, &status, 513 hdcp, "eks_write")) 514 goto out; 515 out: 516 return status; 517 } 518 519 static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp, 520 struct mod_hdcp_event_context *event_ctx, 521 struct mod_hdcp_transition_input_hdcp2 *input) 522 { 523 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 524 525 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 526 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 527 event_ctx->unexpected_event = 1; 528 goto out; 529 } 530 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 531 process_rxstatus(hdcp, event_ctx, input, &status); 532 goto out; 533 } 534 535 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 536 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 537 goto out; 538 if (event_ctx->rx_id_list_ready) 539 goto out; 540 } 541 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption, 542 &input->enable_encryption, &status, 543 hdcp, "enable_encryption")) 544 goto out; 545 if (is_dp_mst_hdcp(hdcp)) { 546 if (!mod_hdcp_execute_and_set( 547 mod_hdcp_hdcp2_enable_dp_stream_encryption, 548 &input->stream_encryption_dp, &status, 549 hdcp, "stream_encryption_dp")) 550 goto out; 551 } 552 out: 553 return status; 554 } 555 556 static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp, 557 struct mod_hdcp_event_context *event_ctx, 558 struct mod_hdcp_transition_input_hdcp2 *input) 559 { 560 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 561 562 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 563 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 564 event_ctx->unexpected_event = 1; 565 goto out; 566 } 567 568 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 569 goto out; 570 if (event_ctx->rx_id_list_ready) 571 goto out; 572 out: 573 return status; 574 } 575 576 static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp, 577 struct mod_hdcp_event_context *event_ctx, 578 struct mod_hdcp_transition_input_hdcp2 *input) 579 { 580 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 581 582 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 583 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 584 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 585 event_ctx->unexpected_event = 1; 586 goto out; 587 } 588 589 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 590 goto out; 591 if (!event_ctx->rx_id_list_ready) { 592 status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; 593 goto out; 594 } 595 out: 596 return status; 597 } 598 599 static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp, 600 struct mod_hdcp_event_context *event_ctx, 601 struct mod_hdcp_transition_input_hdcp2 *input) 602 { 603 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 604 605 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 606 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 607 event_ctx->unexpected_event = 1; 608 goto out; 609 } 610 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 611 process_rxstatus(hdcp, event_ctx, input, &status); 612 goto out; 613 } 614 615 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list, 616 &input->rx_id_list_read, 617 &status, hdcp, "receiver_id_list_read")) 618 goto out; 619 if (!mod_hdcp_execute_and_set(check_device_count, 620 &input->device_count_check, 621 &status, hdcp, "device_count_check")) 622 goto out; 623 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list, 624 &input->rx_id_list_validation, 625 &status, hdcp, "rx_id_list_validation")) 626 goto out; 627 if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack, 628 &input->repeater_auth_ack_write, 629 &status, hdcp, "repeater_auth_ack_write")) 630 goto out; 631 out: 632 return status; 633 } 634 635 static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp, 636 struct mod_hdcp_event_context *event_ctx, 637 struct mod_hdcp_transition_input_hdcp2 *input) 638 { 639 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 640 641 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 642 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 643 event_ctx->unexpected_event = 1; 644 goto out; 645 } 646 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 647 process_rxstatus(hdcp, event_ctx, input, &status); 648 goto out; 649 } 650 651 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 652 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 653 goto out; 654 if (event_ctx->rx_id_list_ready) 655 goto out; 656 } 657 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management, 658 &input->prepare_stream_manage, 659 &status, hdcp, "prepare_stream_manage")) 660 goto out; 661 662 if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage, 663 &input->stream_manage_write, 664 &status, hdcp, "stream_manage_write")) 665 goto out; 666 out: 667 return status; 668 } 669 670 static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp, 671 struct mod_hdcp_event_context *event_ctx, 672 struct mod_hdcp_transition_input_hdcp2 *input) 673 { 674 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 675 676 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 677 event_ctx->event != MOD_HDCP_EVENT_CPIRQ && 678 event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { 679 event_ctx->unexpected_event = 1; 680 goto out; 681 } 682 if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { 683 process_rxstatus(hdcp, event_ctx, input, &status); 684 goto out; 685 } 686 687 if (is_hdmi_dvi_sl_hdcp(hdcp)) { 688 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 689 goto out; 690 if (event_ctx->rx_id_list_ready) { 691 goto out; 692 } 693 } 694 if (is_hdmi_dvi_sl_hdcp(hdcp)) 695 if (!mod_hdcp_execute_and_set(check_stream_ready_available, 696 &input->stream_ready_available, 697 &status, hdcp, "stream_ready_available")) 698 goto out; 699 if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready, 700 &input->stream_ready_read, 701 &status, hdcp, "stream_ready_read")) 702 goto out; 703 if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready, 704 &input->stream_ready_validation, 705 &status, hdcp, "stream_ready_validation")) 706 goto out; 707 708 out: 709 return status; 710 } 711 712 static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp, 713 struct mod_hdcp_event_context *event_ctx, 714 struct mod_hdcp_transition_input_hdcp2 *input) 715 { 716 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 717 718 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { 719 event_ctx->unexpected_event = 1; 720 goto out; 721 } 722 723 if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps, 724 &input->rx_caps_read_dp, 725 &status, hdcp, "rx_caps_read_dp")) 726 goto out; 727 if (!mod_hdcp_execute_and_set(check_hdcp2_capable, 728 &input->hdcp2_capable_check, &status, 729 hdcp, "hdcp2_capable_check")) 730 goto out; 731 out: 732 return status; 733 } 734 735 static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp, 736 struct mod_hdcp_event_context *event_ctx, 737 struct mod_hdcp_transition_input_hdcp2 *input) 738 { 739 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 740 741 if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && 742 event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { 743 event_ctx->unexpected_event = 1; 744 goto out; 745 } 746 747 if (!process_rxstatus(hdcp, event_ctx, input, &status)) 748 goto out; 749 if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type, 750 &input->content_stream_type_write, &status, 751 hdcp, "content_stream_type_write")) 752 goto out; 753 out: 754 return status; 755 } 756 757 enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, 758 struct mod_hdcp_event_context *event_ctx, 759 struct mod_hdcp_transition_input_hdcp2 *input) 760 { 761 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 762 763 switch (current_state(hdcp)) { 764 case H2_A0_KNOWN_HDCP2_CAPABLE_RX: 765 status = known_hdcp2_capable_rx(hdcp, event_ctx, input); 766 break; 767 case H2_A1_SEND_AKE_INIT: 768 status = send_ake_init(hdcp, event_ctx, input); 769 break; 770 case H2_A1_VALIDATE_AKE_CERT: 771 status = validate_ake_cert(hdcp, event_ctx, input); 772 break; 773 case H2_A1_SEND_NO_STORED_KM: 774 status = send_no_stored_km(hdcp, event_ctx, input); 775 break; 776 case H2_A1_READ_H_PRIME: 777 status = read_h_prime(hdcp, event_ctx, input); 778 break; 779 case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: 780 status = read_pairing_info_and_validate_h_prime(hdcp, 781 event_ctx, input); 782 break; 783 case H2_A1_SEND_STORED_KM: 784 status = send_stored_km(hdcp, event_ctx, input); 785 break; 786 case H2_A1_VALIDATE_H_PRIME: 787 status = validate_h_prime(hdcp, event_ctx, input); 788 break; 789 case H2_A2_LOCALITY_CHECK: 790 status = locality_check(hdcp, event_ctx, input); 791 break; 792 case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER: 793 status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input); 794 break; 795 case H2_ENABLE_ENCRYPTION: 796 status = enable_encryption(hdcp, event_ctx, input); 797 break; 798 case H2_A5_AUTHENTICATED: 799 status = authenticated(hdcp, event_ctx, input); 800 break; 801 case H2_A6_WAIT_FOR_RX_ID_LIST: 802 status = wait_for_rx_id_list(hdcp, event_ctx, input); 803 break; 804 case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: 805 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); 806 break; 807 case H2_A9_SEND_STREAM_MANAGEMENT: 808 status = send_stream_management(hdcp, event_ctx, input); 809 break; 810 case H2_A9_VALIDATE_STREAM_READY: 811 status = validate_stream_ready(hdcp, event_ctx, input); 812 break; 813 default: 814 status = MOD_HDCP_STATUS_INVALID_STATE; 815 break; 816 } 817 818 return status; 819 } 820 821 enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, 822 struct mod_hdcp_event_context *event_ctx, 823 struct mod_hdcp_transition_input_hdcp2 *input) 824 { 825 enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; 826 827 switch (current_state(hdcp)) { 828 case D2_A0_DETERMINE_RX_HDCP_CAPABLE: 829 status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input); 830 break; 831 case D2_A1_SEND_AKE_INIT: 832 status = send_ake_init(hdcp, event_ctx, input); 833 break; 834 case D2_A1_VALIDATE_AKE_CERT: 835 status = validate_ake_cert(hdcp, event_ctx, input); 836 break; 837 case D2_A1_SEND_NO_STORED_KM: 838 status = send_no_stored_km(hdcp, event_ctx, input); 839 break; 840 case D2_A1_READ_H_PRIME: 841 status = read_h_prime(hdcp, event_ctx, input); 842 break; 843 case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: 844 status = read_pairing_info_and_validate_h_prime(hdcp, 845 event_ctx, input); 846 break; 847 case D2_A1_SEND_STORED_KM: 848 status = send_stored_km(hdcp, event_ctx, input); 849 break; 850 case D2_A1_VALIDATE_H_PRIME: 851 status = validate_h_prime(hdcp, event_ctx, input); 852 break; 853 case D2_A2_LOCALITY_CHECK: 854 status = locality_check(hdcp, event_ctx, input); 855 break; 856 case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER: 857 status = exchange_ks_and_test_for_repeater(hdcp, 858 event_ctx, input); 859 break; 860 case D2_SEND_CONTENT_STREAM_TYPE: 861 status = send_content_stream_type_dp(hdcp, event_ctx, input); 862 break; 863 case D2_ENABLE_ENCRYPTION: 864 status = enable_encryption(hdcp, event_ctx, input); 865 break; 866 case D2_A5_AUTHENTICATED: 867 status = authenticated(hdcp, event_ctx, input); 868 break; 869 case D2_A6_WAIT_FOR_RX_ID_LIST: 870 status = wait_for_rx_id_list(hdcp, event_ctx, input); 871 break; 872 case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: 873 status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); 874 break; 875 case D2_A9_SEND_STREAM_MANAGEMENT: 876 status = send_stream_management(hdcp, event_ctx, input); 877 break; 878 case D2_A9_VALIDATE_STREAM_READY: 879 status = validate_stream_ready(hdcp, event_ctx, input); 880 break; 881 default: 882 status = MOD_HDCP_STATUS_INVALID_STATE; 883 break; 884 } 885 886 return status; 887 } 888