| 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[0]) && |
| 38 | (HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| 39 | hdcp->auth.msg.hdcp2.rxstatus[0])) ? 1 : 0; |
| 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[0]) ? |
| 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_added_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 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version, |
| 263 | &input->hdcp2version_read, &status, |
| 264 | hdcp, "hdcp2version_read")) |
| 265 | goto out; |
| 266 | if (!mod_hdcp_execute_and_set(check_hdcp2_capable, |
| 267 | &input->hdcp2_capable_check, &status, |
| 268 | hdcp, "hdcp2_capable")) |
| 269 | goto out; |
| 270 | out: |
| 271 | return status; |
| 272 | } |
| 273 | |
| 274 | static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp, |
| 275 | struct mod_hdcp_event_context *event_ctx, |
| 276 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 277 | { |
| 278 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 279 | |
| 280 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 281 | event_ctx->unexpected_event = 1; |
| 282 | goto out; |
| 283 | } |
| 284 | if (!mod_hdcp_execute_and_set(mod_hdcp_add_display_topology, |
| 285 | &input->add_topology, &status, |
| 286 | hdcp, "add_topology")) |
| 287 | goto out; |
| 288 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session, |
| 289 | &input->create_session, &status, |
| 290 | hdcp, "create_session")) |
| 291 | goto out; |
| 292 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init, |
| 293 | &input->ake_init_prepare, &status, |
| 294 | hdcp, "ake_init_prepare")) |
| 295 | goto out; |
| 296 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init, |
| 297 | &input->ake_init_write, &status, |
| 298 | hdcp, "ake_init_write")) |
| 299 | goto out; |
| 300 | out: |
| 301 | return status; |
| 302 | } |
| 303 | |
| 304 | static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp, |
| 305 | struct mod_hdcp_event_context *event_ctx, |
| 306 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 307 | { |
| 308 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 309 | |
| 310 | |
| 311 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 312 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 313 | event_ctx->unexpected_event = 1; |
| 314 | goto out; |
| 315 | } |
| 316 | |
| 317 | if (is_hdmi_dvi_sl_hdcp(hdcp)) |
| 318 | if (!mod_hdcp_execute_and_set(check_ake_cert_available, |
| 319 | &input->ake_cert_available, &status, |
| 320 | hdcp, "ake_cert_available")) |
| 321 | goto out; |
| 322 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert, |
| 323 | &input->ake_cert_read, &status, |
| 324 | hdcp, "ake_cert_read")) |
| 325 | goto out; |
| 326 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert, |
| 327 | &input->ake_cert_validation, &status, |
| 328 | hdcp, "ake_cert_validation")) |
| 329 | goto out; |
| 330 | out: |
| 331 | return status; |
| 332 | } |
| 333 | |
| 334 | static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp, |
| 335 | struct mod_hdcp_event_context *event_ctx, |
| 336 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 337 | { |
| 338 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 339 | |
| 340 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 341 | event_ctx->unexpected_event = 1; |
| 342 | goto out; |
| 343 | } |
| 344 | |
| 345 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km, |
| 346 | &input->no_stored_km_write, &status, |
| 347 | hdcp, "no_stored_km_write")) |
| 348 | goto out; |
| 349 | out: |
| 350 | return status; |
| 351 | } |
| 352 | |
| 353 | static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp, |
| 354 | struct mod_hdcp_event_context *event_ctx, |
| 355 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 356 | { |
| 357 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 358 | |
| 359 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 360 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| 361 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 362 | event_ctx->unexpected_event = 1; |
| 363 | goto out; |
| 364 | } |
| 365 | |
| 366 | if (!mod_hdcp_execute_and_set(check_h_prime_available, |
| 367 | &input->h_prime_available, &status, |
| 368 | hdcp, "h_prime_available")) |
| 369 | goto out; |
| 370 | |
| 371 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, |
| 372 | &input->h_prime_read, &status, |
| 373 | hdcp, "h_prime_read")) |
| 374 | goto out; |
| 375 | out: |
| 376 | return status; |
| 377 | } |
| 378 | |
| 379 | static enum mod_hdcp_status read_pairing_info_and_validate_h_prime( |
| 380 | struct mod_hdcp *hdcp, |
| 381 | struct mod_hdcp_event_context *event_ctx, |
| 382 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 383 | { |
| 384 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 385 | |
| 386 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 387 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| 388 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 389 | event_ctx->unexpected_event = 1; |
| 390 | goto out; |
| 391 | } |
| 392 | |
| 393 | if (!mod_hdcp_execute_and_set(check_pairing_info_available, |
| 394 | &input->pairing_available, &status, |
| 395 | hdcp, "pairing_available")) |
| 396 | goto out; |
| 397 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info, |
| 398 | &input->pairing_info_read, &status, |
| 399 | hdcp, "pairing_info_read")) |
| 400 | goto out; |
| 401 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, |
| 402 | &input->h_prime_validation, &status, |
| 403 | hdcp, "h_prime_validation")) |
| 404 | goto out; |
| 405 | out: |
| 406 | return status; |
| 407 | } |
| 408 | |
| 409 | static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp, |
| 410 | struct mod_hdcp_event_context *event_ctx, |
| 411 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 412 | { |
| 413 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 414 | |
| 415 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 416 | event_ctx->unexpected_event = 1; |
| 417 | goto out; |
| 418 | } |
| 419 | |
| 420 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km, |
| 421 | &input->stored_km_write, &status, |
| 422 | hdcp, "stored_km_write")) |
| 423 | goto out; |
| 424 | out: |
| 425 | return status; |
| 426 | } |
| 427 | |
| 428 | static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp, |
| 429 | struct mod_hdcp_event_context *event_ctx, |
| 430 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 431 | { |
| 432 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 433 | |
| 434 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 435 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| 436 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 437 | event_ctx->unexpected_event = 1; |
| 438 | goto out; |
| 439 | } |
| 440 | |
| 441 | if (!mod_hdcp_execute_and_set(check_h_prime_available, |
| 442 | &input->h_prime_available, &status, |
| 443 | hdcp, "h_prime_available")) |
| 444 | goto out; |
| 445 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, |
| 446 | &input->h_prime_read, &status, |
| 447 | hdcp, "h_prime_read")) |
| 448 | goto out; |
| 449 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, |
| 450 | &input->h_prime_validation, &status, |
| 451 | hdcp, "h_prime_validation")) |
| 452 | goto out; |
| 453 | out: |
| 454 | return status; |
| 455 | } |
| 456 | |
| 457 | static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp, |
| 458 | struct mod_hdcp_event_context *event_ctx, |
| 459 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 460 | { |
| 461 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 462 | |
| 463 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 464 | event_ctx->unexpected_event = 1; |
| 465 | goto out; |
| 466 | } |
| 467 | |
| 468 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init, |
| 469 | &input->lc_init_prepare, &status, |
| 470 | hdcp, "lc_init_prepare")) |
| 471 | goto out; |
| 472 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init, |
| 473 | &input->lc_init_write, &status, |
| 474 | hdcp, "lc_init_write")) |
| 475 | goto out; |
| 476 | if (is_dp_hdcp(hdcp)) |
| 477 | msleep(16); |
| 478 | else |
| 479 | if (!mod_hdcp_execute_and_set(poll_l_prime_available, |
| 480 | &input->l_prime_available_poll, &status, |
| 481 | hdcp, "l_prime_available_poll")) |
| 482 | goto out; |
| 483 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime, |
| 484 | &input->l_prime_read, &status, |
| 485 | hdcp, "l_prime_read")) |
| 486 | goto out; |
| 487 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime, |
| 488 | &input->l_prime_validation, &status, |
| 489 | hdcp, "l_prime_validation")) |
| 490 | goto out; |
| 491 | out: |
| 492 | return status; |
| 493 | } |
| 494 | |
| 495 | static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp, |
| 496 | struct mod_hdcp_event_context *event_ctx, |
| 497 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 498 | { |
| 499 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 500 | |
| 501 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 502 | event_ctx->unexpected_event = 1; |
| 503 | goto out; |
| 504 | } |
| 505 | |
| 506 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks, |
| 507 | &input->eks_prepare, &status, |
| 508 | hdcp, "eks_prepare")) |
| 509 | goto out; |
| 510 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks, |
| 511 | &input->eks_write, &status, |
| 512 | hdcp, "eks_write")) |
| 513 | goto out; |
| 514 | out: |
| 515 | return status; |
| 516 | } |
| 517 | |
| 518 | static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp, |
| 519 | struct mod_hdcp_event_context *event_ctx, |
| 520 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 521 | { |
| 522 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 523 | |
| 524 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 525 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| 526 | event_ctx->unexpected_event = 1; |
| 527 | goto out; |
| 528 | } |
| 529 | if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| 530 | process_rxstatus(hdcp, event_ctx, input, &status); |
| 531 | goto out; |
| 532 | } |
| 533 | |
| 534 | if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| 535 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 536 | goto out; |
| 537 | if (event_ctx->rx_id_list_ready) |
| 538 | goto out; |
| 539 | } |
| 540 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption, |
| 541 | &input->enable_encryption, &status, |
| 542 | hdcp, "enable_encryption")) |
| 543 | goto out; |
| 544 | if (is_dp_mst_hdcp(hdcp)) { |
| 545 | if (!mod_hdcp_execute_and_set( |
| 546 | mod_hdcp_hdcp2_enable_dp_stream_encryption, |
| 547 | &input->stream_encryption_dp, &status, |
| 548 | hdcp, "stream_encryption_dp")) |
| 549 | goto out; |
| 550 | } |
| 551 | out: |
| 552 | return status; |
| 553 | } |
| 554 | |
| 555 | static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp, |
| 556 | struct mod_hdcp_event_context *event_ctx, |
| 557 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 558 | { |
| 559 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 560 | |
| 561 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 562 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| 563 | event_ctx->unexpected_event = 1; |
| 564 | goto out; |
| 565 | } |
| 566 | |
| 567 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 568 | goto out; |
| 569 | if (event_ctx->rx_id_list_ready) |
| 570 | goto out; |
| 571 | out: |
| 572 | return status; |
| 573 | } |
| 574 | |
| 575 | static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp, |
| 576 | struct mod_hdcp_event_context *event_ctx, |
| 577 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 578 | { |
| 579 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 580 | |
| 581 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 582 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| 583 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 584 | event_ctx->unexpected_event = 1; |
| 585 | goto out; |
| 586 | } |
| 587 | |
| 588 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 589 | goto out; |
| 590 | if (!event_ctx->rx_id_list_ready) { |
| 591 | status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; |
| 592 | goto out; |
| 593 | } |
| 594 | out: |
| 595 | return status; |
| 596 | } |
| 597 | |
| 598 | static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp, |
| 599 | struct mod_hdcp_event_context *event_ctx, |
| 600 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 601 | { |
| 602 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 603 | |
| 604 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 605 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| 606 | event_ctx->unexpected_event = 1; |
| 607 | goto out; |
| 608 | } |
| 609 | if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| 610 | process_rxstatus(hdcp, event_ctx, input, &status); |
| 611 | goto out; |
| 612 | } |
| 613 | |
| 614 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list, |
| 615 | &input->rx_id_list_read, |
| 616 | &status, hdcp, "receiver_id_list_read")) |
| 617 | goto out; |
| 618 | if (!mod_hdcp_execute_and_set(check_device_count, |
| 619 | &input->device_count_check, |
| 620 | &status, hdcp, "device_count_check")) |
| 621 | goto out; |
| 622 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list, |
| 623 | &input->rx_id_list_validation, |
| 624 | &status, hdcp, "rx_id_list_validation")) |
| 625 | goto out; |
| 626 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack, |
| 627 | &input->repeater_auth_ack_write, |
| 628 | &status, hdcp, "repeater_auth_ack_write")) |
| 629 | goto out; |
| 630 | out: |
| 631 | return status; |
| 632 | } |
| 633 | |
| 634 | static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp, |
| 635 | struct mod_hdcp_event_context *event_ctx, |
| 636 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 637 | { |
| 638 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 639 | |
| 640 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 641 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| 642 | event_ctx->unexpected_event = 1; |
| 643 | goto out; |
| 644 | } |
| 645 | if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| 646 | process_rxstatus(hdcp, event_ctx, input, &status); |
| 647 | goto out; |
| 648 | } |
| 649 | |
| 650 | if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| 651 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 652 | goto out; |
| 653 | if (event_ctx->rx_id_list_ready) |
| 654 | goto out; |
| 655 | } |
| 656 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management, |
| 657 | &input->prepare_stream_manage, |
| 658 | &status, hdcp, "prepare_stream_manage")) |
| 659 | goto out; |
| 660 | |
| 661 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage, |
| 662 | &input->stream_manage_write, |
| 663 | &status, hdcp, "stream_manage_write")) |
| 664 | goto out; |
| 665 | out: |
| 666 | return status; |
| 667 | } |
| 668 | |
| 669 | static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp, |
| 670 | struct mod_hdcp_event_context *event_ctx, |
| 671 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 672 | { |
| 673 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 674 | |
| 675 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 676 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| 677 | event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| 678 | event_ctx->unexpected_event = 1; |
| 679 | goto out; |
| 680 | } |
| 681 | if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| 682 | process_rxstatus(hdcp, event_ctx, input, &status); |
| 683 | goto out; |
| 684 | } |
| 685 | |
| 686 | if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| 687 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 688 | goto out; |
| 689 | if (event_ctx->rx_id_list_ready) { |
| 690 | goto out; |
| 691 | } |
| 692 | } |
| 693 | if (is_hdmi_dvi_sl_hdcp(hdcp)) |
| 694 | if (!mod_hdcp_execute_and_set(check_stream_ready_available, |
| 695 | &input->stream_ready_available, |
| 696 | &status, hdcp, "stream_ready_available")) |
| 697 | goto out; |
| 698 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready, |
| 699 | &input->stream_ready_read, |
| 700 | &status, hdcp, "stream_ready_read")) |
| 701 | goto out; |
| 702 | if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready, |
| 703 | &input->stream_ready_validation, |
| 704 | &status, hdcp, "stream_ready_validation")) |
| 705 | goto out; |
| 706 | |
| 707 | out: |
| 708 | return status; |
| 709 | } |
| 710 | |
| 711 | static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp, |
| 712 | struct mod_hdcp_event_context *event_ctx, |
| 713 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 714 | { |
| 715 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 716 | |
| 717 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| 718 | event_ctx->unexpected_event = 1; |
| 719 | goto out; |
| 720 | } |
| 721 | |
| 722 | if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps, |
| 723 | &input->rx_caps_read_dp, |
| 724 | &status, hdcp, "rx_caps_read_dp")) |
| 725 | goto out; |
| 726 | if (!mod_hdcp_execute_and_set(check_hdcp2_capable, |
| 727 | &input->hdcp2_capable_check, &status, |
| 728 | hdcp, "hdcp2_capable_check")) |
| 729 | goto out; |
| 730 | out: |
| 731 | return status; |
| 732 | } |
| 733 | |
| 734 | static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp, |
| 735 | struct mod_hdcp_event_context *event_ctx, |
| 736 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 737 | { |
| 738 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 739 | |
| 740 | if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| 741 | event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| 742 | event_ctx->unexpected_event = 1; |
| 743 | goto out; |
| 744 | } |
| 745 | |
| 746 | if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| 747 | goto out; |
| 748 | if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type, |
| 749 | &input->content_stream_type_write, &status, |
| 750 | hdcp, "content_stream_type_write")) |
| 751 | goto out; |
| 752 | out: |
| 753 | return status; |
| 754 | } |
| 755 | |
| 756 | enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, |
| 757 | struct mod_hdcp_event_context *event_ctx, |
| 758 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 759 | { |
| 760 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 761 | |
| 762 | switch (current_state(hdcp)) { |
| 763 | case H2_A0_KNOWN_HDCP2_CAPABLE_RX: |
| 764 | status = known_hdcp2_capable_rx(hdcp, event_ctx, input); |
| 765 | break; |
| 766 | case H2_A1_SEND_AKE_INIT: |
| 767 | status = send_ake_init(hdcp, event_ctx, input); |
| 768 | break; |
| 769 | case H2_A1_VALIDATE_AKE_CERT: |
| 770 | status = validate_ake_cert(hdcp, event_ctx, input); |
| 771 | break; |
| 772 | case H2_A1_SEND_NO_STORED_KM: |
| 773 | status = send_no_stored_km(hdcp, event_ctx, input); |
| 774 | break; |
| 775 | case H2_A1_READ_H_PRIME: |
| 776 | status = read_h_prime(hdcp, event_ctx, input); |
| 777 | break; |
| 778 | case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: |
| 779 | status = read_pairing_info_and_validate_h_prime(hdcp, |
| 780 | event_ctx, input); |
| 781 | break; |
| 782 | case H2_A1_SEND_STORED_KM: |
| 783 | status = send_stored_km(hdcp, event_ctx, input); |
| 784 | break; |
| 785 | case H2_A1_VALIDATE_H_PRIME: |
| 786 | status = validate_h_prime(hdcp, event_ctx, input); |
| 787 | break; |
| 788 | case H2_A2_LOCALITY_CHECK: |
| 789 | status = locality_check(hdcp, event_ctx, input); |
| 790 | break; |
| 791 | case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER: |
| 792 | status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input); |
| 793 | break; |
| 794 | case H2_ENABLE_ENCRYPTION: |
| 795 | status = enable_encryption(hdcp, event_ctx, input); |
| 796 | break; |
| 797 | case H2_A5_AUTHENTICATED: |
| 798 | status = authenticated(hdcp, event_ctx, input); |
| 799 | break; |
| 800 | case H2_A6_WAIT_FOR_RX_ID_LIST: |
| 801 | status = wait_for_rx_id_list(hdcp, event_ctx, input); |
| 802 | break; |
| 803 | case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: |
| 804 | status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); |
| 805 | break; |
| 806 | case H2_A9_SEND_STREAM_MANAGEMENT: |
| 807 | status = send_stream_management(hdcp, event_ctx, input); |
| 808 | break; |
| 809 | case H2_A9_VALIDATE_STREAM_READY: |
| 810 | status = validate_stream_ready(hdcp, event_ctx, input); |
| 811 | break; |
| 812 | default: |
| 813 | status = MOD_HDCP_STATUS_INVALID_STATE; |
| 814 | break; |
| 815 | } |
| 816 | |
| 817 | return status; |
| 818 | } |
| 819 | |
| 820 | enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, |
| 821 | struct mod_hdcp_event_context *event_ctx, |
| 822 | struct mod_hdcp_transition_input_hdcp2 *input) |
| 823 | { |
| 824 | enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| 825 | |
| 826 | switch (current_state(hdcp)) { |
| 827 | case D2_A0_DETERMINE_RX_HDCP_CAPABLE: |
| 828 | status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input); |
| 829 | break; |
| 830 | case D2_A1_SEND_AKE_INIT: |
| 831 | status = send_ake_init(hdcp, event_ctx, input); |
| 832 | break; |
| 833 | case D2_A1_VALIDATE_AKE_CERT: |
| 834 | status = validate_ake_cert(hdcp, event_ctx, input); |
| 835 | break; |
| 836 | case D2_A1_SEND_NO_STORED_KM: |
| 837 | status = send_no_stored_km(hdcp, event_ctx, input); |
| 838 | break; |
| 839 | case D2_A1_READ_H_PRIME: |
| 840 | status = read_h_prime(hdcp, event_ctx, input); |
| 841 | break; |
| 842 | case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: |
| 843 | status = read_pairing_info_and_validate_h_prime(hdcp, |
| 844 | event_ctx, input); |
| 845 | break; |
| 846 | case D2_A1_SEND_STORED_KM: |
| 847 | status = send_stored_km(hdcp, event_ctx, input); |
| 848 | break; |
| 849 | case D2_A1_VALIDATE_H_PRIME: |
| 850 | status = validate_h_prime(hdcp, event_ctx, input); |
| 851 | break; |
| 852 | case D2_A2_LOCALITY_CHECK: |
| 853 | status = locality_check(hdcp, event_ctx, input); |
| 854 | break; |
| 855 | case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER: |
| 856 | status = exchange_ks_and_test_for_repeater(hdcp, |
| 857 | event_ctx, input); |
| 858 | break; |
| 859 | case D2_SEND_CONTENT_STREAM_TYPE: |
| 860 | status = send_content_stream_type_dp(hdcp, event_ctx, input); |
| 861 | break; |
| 862 | case D2_ENABLE_ENCRYPTION: |
| 863 | status = enable_encryption(hdcp, event_ctx, input); |
| 864 | break; |
| 865 | case D2_A5_AUTHENTICATED: |
| 866 | status = authenticated(hdcp, event_ctx, input); |
| 867 | break; |
| 868 | case D2_A6_WAIT_FOR_RX_ID_LIST: |
| 869 | status = wait_for_rx_id_list(hdcp, event_ctx, input); |
| 870 | break; |
| 871 | case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: |
| 872 | status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); |
| 873 | break; |
| 874 | case D2_A9_SEND_STREAM_MANAGEMENT: |
| 875 | status = send_stream_management(hdcp, event_ctx, input); |
| 876 | break; |
| 877 | case D2_A9_VALIDATE_STREAM_READY: |
| 878 | status = validate_stream_ready(hdcp, event_ctx, input); |
| 879 | break; |
| 880 | default: |
| 881 | status = MOD_HDCP_STATUS_INVALID_STATE; |
| 882 | break; |
| 883 | } |
| 884 | |
| 885 | return status; |
| 886 | } |