| /* |
| * Copyright 2018 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: AMD |
| * |
| */ |
| |
| #include <linux/delay.h> |
| |
| #include "hdcp.h" |
| |
| static inline enum mod_hdcp_status check_receiver_id_list_ready(struct mod_hdcp *hdcp) |
| { |
| uint8_t is_ready = 0; |
| |
| if (is_dp_hdcp(hdcp)) |
| is_ready = HDCP_2_2_DP_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus_dp) ? 1 : 0; |
| else |
| is_ready = (HDCP_2_2_HDMI_RXSTATUS_READY(hdcp->auth.msg.hdcp2.rxstatus[1]) && |
| (HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0])) ? 1 : 0; |
| return is_ready ? MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; |
| } |
| |
| static inline enum mod_hdcp_status check_hdcp2_capable(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status; |
| |
| if (is_dp_hdcp(hdcp)) |
| status = (hdcp->auth.msg.hdcp2.rxcaps_dp[0] == HDCP_2_2_RX_CAPS_VERSION_VAL) && |
| HDCP_2_2_DP_HDCP_CAPABLE(hdcp->auth.msg.hdcp2.rxcaps_dp[2]) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE; |
| else |
| status = (hdcp->auth.msg.hdcp2.hdcp2version_hdmi & HDCP_2_2_HDMI_SUPPORT_MASK) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_NOT_CAPABLE; |
| return status; |
| } |
| |
| static inline enum mod_hdcp_status check_reauthentication_request( |
| struct mod_hdcp *hdcp) |
| { |
| uint8_t ret = 0; |
| |
| if (is_dp_hdcp(hdcp)) |
| ret = HDCP_2_2_DP_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus_dp) ? |
| MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST : |
| MOD_HDCP_STATUS_SUCCESS; |
| else |
| ret = HDCP_2_2_HDMI_RXSTATUS_REAUTH_REQ(hdcp->auth.msg.hdcp2.rxstatus[1]) ? |
| MOD_HDCP_STATUS_HDCP2_REAUTH_REQUEST : |
| MOD_HDCP_STATUS_SUCCESS; |
| return ret; |
| } |
| |
| static inline enum mod_hdcp_status check_link_integrity_failure_dp( |
| struct mod_hdcp *hdcp) |
| { |
| return HDCP_2_2_DP_RXSTATUS_LINK_FAILED(hdcp->auth.msg.hdcp2.rxstatus_dp) ? |
| MOD_HDCP_STATUS_HDCP2_REAUTH_LINK_INTEGRITY_FAILURE : |
| MOD_HDCP_STATUS_SUCCESS; |
| } |
| |
| static enum mod_hdcp_status check_ake_cert_available(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status; |
| uint16_t size; |
| |
| if (is_dp_hdcp(hdcp)) { |
| status = MOD_HDCP_STATUS_SUCCESS; |
| } else { |
| status = mod_hdcp_read_rxstatus(hdcp); |
| if (status == MOD_HDCP_STATUS_SUCCESS) { |
| size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_cert)) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_AKE_CERT_PENDING; |
| } |
| } |
| return status; |
| } |
| |
| static enum mod_hdcp_status check_h_prime_available(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status; |
| uint8_t size; |
| |
| status = mod_hdcp_read_rxstatus(hdcp); |
| if (status != MOD_HDCP_STATUS_SUCCESS) |
| goto out; |
| |
| if (is_dp_hdcp(hdcp)) { |
| status = HDCP_2_2_DP_RXSTATUS_H_PRIME(hdcp->auth.msg.hdcp2.rxstatus_dp) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING; |
| } else { |
| size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_h_prime)) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_H_PRIME_PENDING; |
| } |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status check_pairing_info_available(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status; |
| uint8_t size; |
| |
| status = mod_hdcp_read_rxstatus(hdcp); |
| if (status != MOD_HDCP_STATUS_SUCCESS) |
| goto out; |
| |
| if (is_dp_hdcp(hdcp)) { |
| status = HDCP_2_2_DP_RXSTATUS_PAIRING(hdcp->auth.msg.hdcp2.rxstatus_dp) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING; |
| } else { |
| size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| status = (size == sizeof(hdcp->auth.msg.hdcp2.ake_pairing_info)) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_PAIRING_INFO_PENDING; |
| } |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status poll_l_prime_available(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_FAILURE; |
| uint8_t size; |
| uint16_t max_wait = 20; // units of ms |
| uint16_t num_polls = 5; |
| uint16_t wait_time = max_wait / num_polls; |
| |
| if (is_dp_hdcp(hdcp)) |
| status = MOD_HDCP_STATUS_INVALID_OPERATION; |
| else |
| for (; num_polls; num_polls--) { |
| msleep(wait_time); |
| |
| status = mod_hdcp_read_rxstatus(hdcp); |
| if (status != MOD_HDCP_STATUS_SUCCESS) |
| break; |
| |
| size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| status = (size == sizeof(hdcp->auth.msg.hdcp2.lc_l_prime)) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_L_PRIME_PENDING; |
| if (status == MOD_HDCP_STATUS_SUCCESS) |
| break; |
| } |
| return status; |
| } |
| |
| static enum mod_hdcp_status check_stream_ready_available(struct mod_hdcp *hdcp) |
| { |
| enum mod_hdcp_status status; |
| uint8_t size; |
| |
| if (is_dp_hdcp(hdcp)) { |
| status = MOD_HDCP_STATUS_INVALID_OPERATION; |
| } else { |
| status = mod_hdcp_read_rxstatus(hdcp); |
| if (status != MOD_HDCP_STATUS_SUCCESS) |
| goto out; |
| size = HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| status = (size == sizeof(hdcp->auth.msg.hdcp2.repeater_auth_stream_ready)) ? |
| MOD_HDCP_STATUS_SUCCESS : |
| MOD_HDCP_STATUS_HDCP2_STREAM_READY_PENDING; |
| } |
| out: |
| return status; |
| } |
| |
| static inline uint8_t get_device_count(struct mod_hdcp *hdcp) |
| { |
| return HDCP_2_2_DEV_COUNT_LO(hdcp->auth.msg.hdcp2.rx_id_list[2]) + |
| (HDCP_2_2_DEV_COUNT_HI(hdcp->auth.msg.hdcp2.rx_id_list[1]) << 4); |
| } |
| |
| static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp) |
| { |
| /* Avoid device count == 0 to do authentication */ |
| if (get_device_count(hdcp) == 0) |
| return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE; |
| |
| /* Some MST display may choose to report the internal panel as an HDCP RX. */ |
| /* To update this condition with 1(because the immediate repeater's internal */ |
| /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */ |
| /* Device count must be greater than or equal to tracked hdcp displays. */ |
| return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ? |
| MOD_HDCP_STATUS_HDCP2_DEVICE_COUNT_MISMATCH_FAILURE : |
| MOD_HDCP_STATUS_SUCCESS; |
| } |
| |
| static uint8_t process_rxstatus(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input, |
| enum mod_hdcp_status *status) |
| { |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxstatus, |
| &input->rxstatus_read, status, |
| hdcp, "rxstatus_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(check_reauthentication_request, |
| &input->reauth_request_check, status, |
| hdcp, "reauth_request_check")) |
| goto out; |
| if (is_dp_hdcp(hdcp)) { |
| if (!mod_hdcp_execute_and_set(check_link_integrity_failure_dp, |
| &input->link_integrity_check_dp, status, |
| hdcp, "link_integrity_check_dp")) |
| goto out; |
| } |
| if (hdcp->connection.is_repeater) |
| if (check_receiver_id_list_ready(hdcp) == |
| MOD_HDCP_STATUS_SUCCESS) { |
| HDCP_INPUT_PASS_TRACE(hdcp, "rx_id_list_ready"); |
| event_ctx->rx_id_list_ready = 1; |
| if (is_dp_hdcp(hdcp)) |
| hdcp->auth.msg.hdcp2.rx_id_list_size = |
| sizeof(hdcp->auth.msg.hdcp2.rx_id_list); |
| else |
| hdcp->auth.msg.hdcp2.rx_id_list_size = |
| HDCP_2_2_HDMI_RXSTATUS_MSG_SZ_HI(hdcp->auth.msg.hdcp2.rxstatus[1]) << 8 | |
| hdcp->auth.msg.hdcp2.rxstatus[0]; |
| } |
| out: |
| return (*status == MOD_HDCP_STATUS_SUCCESS); |
| } |
| |
| static enum mod_hdcp_status known_hdcp2_capable_rx(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_hdcp2version, |
| &input->hdcp2version_read, &status, |
| hdcp, "hdcp2version_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(check_hdcp2_capable, |
| &input->hdcp2_capable_check, &status, |
| hdcp, "hdcp2_capable")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status send_ake_init(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_create_session, |
| &input->create_session, &status, |
| hdcp, "create_session")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_ake_init, |
| &input->ake_init_prepare, &status, |
| hdcp, "ake_init_prepare")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_ake_init, |
| &input->ake_init_write, &status, |
| hdcp, "ake_init_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status validate_ake_cert(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (is_hdmi_dvi_sl_hdcp(hdcp)) |
| if (!mod_hdcp_execute_and_set(check_ake_cert_available, |
| &input->ake_cert_available, &status, |
| hdcp, "ake_cert_available")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_ake_cert, |
| &input->ake_cert_read, &status, |
| hdcp, "ake_cert_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_ake_cert, |
| &input->ake_cert_validation, &status, |
| hdcp, "ake_cert_validation")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status send_no_stored_km(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_no_stored_km, |
| &input->no_stored_km_write, &status, |
| hdcp, "no_stored_km_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status read_h_prime(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(check_h_prime_available, |
| &input->h_prime_available, &status, |
| hdcp, "h_prime_available")) |
| goto out; |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, |
| &input->h_prime_read, &status, |
| hdcp, "h_prime_read")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status read_pairing_info_and_validate_h_prime( |
| struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(check_pairing_info_available, |
| &input->pairing_available, &status, |
| hdcp, "pairing_available")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_pairing_info, |
| &input->pairing_info_read, &status, |
| hdcp, "pairing_info_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, |
| &input->h_prime_validation, &status, |
| hdcp, "h_prime_validation")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status send_stored_km(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_stored_km, |
| &input->stored_km_write, &status, |
| hdcp, "stored_km_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status validate_h_prime(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(check_h_prime_available, |
| &input->h_prime_available, &status, |
| hdcp, "h_prime_available")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_h_prime, |
| &input->h_prime_read, &status, |
| hdcp, "h_prime_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_h_prime, |
| &input->h_prime_validation, &status, |
| hdcp, "h_prime_validation")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status locality_check(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_lc_init, |
| &input->lc_init_prepare, &status, |
| hdcp, "lc_init_prepare")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_lc_init, |
| &input->lc_init_write, &status, |
| hdcp, "lc_init_write")) |
| goto out; |
| if (is_dp_hdcp(hdcp)) |
| msleep(16); |
| else |
| if (!mod_hdcp_execute_and_set(poll_l_prime_available, |
| &input->l_prime_available_poll, &status, |
| hdcp, "l_prime_available_poll")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_l_prime, |
| &input->l_prime_read, &status, |
| hdcp, "l_prime_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_l_prime, |
| &input->l_prime_validation, &status, |
| hdcp, "l_prime_validation")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status exchange_ks_and_test_for_repeater(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_eks, |
| &input->eks_prepare, &status, |
| hdcp, "eks_prepare")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_eks, |
| &input->eks_write, &status, |
| hdcp, "eks_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status enable_encryption(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| process_rxstatus(hdcp, event_ctx, input, &status); |
| goto out; |
| } |
| |
| if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| goto out; |
| if (event_ctx->rx_id_list_ready) |
| goto out; |
| } |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_enable_encryption, |
| &input->enable_encryption, &status, |
| hdcp, "enable_encryption")) |
| goto out; |
| if (is_dp_mst_hdcp(hdcp)) { |
| if (!mod_hdcp_execute_and_set( |
| mod_hdcp_hdcp2_enable_dp_stream_encryption, |
| &input->stream_encryption_dp, &status, |
| hdcp, "stream_encryption_dp")) |
| goto out; |
| } |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| process_rxstatus(hdcp, event_ctx, input, &status); |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status wait_for_rx_id_list(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| goto out; |
| if (!event_ctx->rx_id_list_ready) { |
| status = MOD_HDCP_STATUS_HDCP2_RX_ID_LIST_NOT_READY; |
| goto out; |
| } |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status verify_rx_id_list_and_send_ack(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| process_rxstatus(hdcp, event_ctx, input, &status); |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_rx_id_list, |
| &input->rx_id_list_read, |
| &status, hdcp, "receiver_id_list_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(check_device_count, |
| &input->device_count_check, |
| &status, hdcp, "device_count_check")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_rx_id_list, |
| &input->rx_id_list_validation, |
| &status, hdcp, "rx_id_list_validation")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_repeater_auth_ack, |
| &input->repeater_auth_ack_write, |
| &status, hdcp, "repeater_auth_ack_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status send_stream_management(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| process_rxstatus(hdcp, event_ctx, input, &status); |
| goto out; |
| } |
| |
| if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| goto out; |
| if (event_ctx->rx_id_list_ready) |
| goto out; |
| } |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_prepare_stream_management, |
| &input->prepare_stream_manage, |
| &status, hdcp, "prepare_stream_manage")) |
| goto out; |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_stream_manage, |
| &input->stream_manage_write, |
| &status, hdcp, "stream_manage_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status validate_stream_ready(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ && |
| event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| if (event_ctx->event == MOD_HDCP_EVENT_CPIRQ) { |
| process_rxstatus(hdcp, event_ctx, input, &status); |
| goto out; |
| } |
| |
| if (is_hdmi_dvi_sl_hdcp(hdcp)) { |
| if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| goto out; |
| if (event_ctx->rx_id_list_ready) |
| goto out; |
| } |
| if (is_hdmi_dvi_sl_hdcp(hdcp)) |
| if (!mod_hdcp_execute_and_set(check_stream_ready_available, |
| &input->stream_ready_available, |
| &status, hdcp, "stream_ready_available")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_stream_ready, |
| &input->stream_ready_read, |
| &status, hdcp, "stream_ready_read")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp2_validate_stream_ready, |
| &input->stream_ready_validation, |
| &status, hdcp, "stream_ready_validation")) |
| goto out; |
| |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!mod_hdcp_execute_and_set(mod_hdcp_read_rxcaps, |
| &input->rx_caps_read_dp, |
| &status, hdcp, "rx_caps_read_dp")) |
| goto out; |
| if (!mod_hdcp_execute_and_set(check_hdcp2_capable, |
| &input->hdcp2_capable_check, &status, |
| hdcp, "hdcp2_capable_check")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| static enum mod_hdcp_status send_content_stream_type_dp(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK && |
| event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { |
| event_ctx->unexpected_event = 1; |
| goto out; |
| } |
| |
| if (!process_rxstatus(hdcp, event_ctx, input, &status)) |
| goto out; |
| if (!mod_hdcp_execute_and_set(mod_hdcp_write_content_type, |
| &input->content_stream_type_write, &status, |
| hdcp, "content_stream_type_write")) |
| goto out; |
| out: |
| return status; |
| } |
| |
| enum mod_hdcp_status mod_hdcp_hdcp2_execution(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| switch (current_state(hdcp)) { |
| case H2_A0_KNOWN_HDCP2_CAPABLE_RX: |
| status = known_hdcp2_capable_rx(hdcp, event_ctx, input); |
| break; |
| case H2_A1_SEND_AKE_INIT: |
| status = send_ake_init(hdcp, event_ctx, input); |
| break; |
| case H2_A1_VALIDATE_AKE_CERT: |
| status = validate_ake_cert(hdcp, event_ctx, input); |
| break; |
| case H2_A1_SEND_NO_STORED_KM: |
| status = send_no_stored_km(hdcp, event_ctx, input); |
| break; |
| case H2_A1_READ_H_PRIME: |
| status = read_h_prime(hdcp, event_ctx, input); |
| break; |
| case H2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: |
| status = read_pairing_info_and_validate_h_prime(hdcp, |
| event_ctx, input); |
| break; |
| case H2_A1_SEND_STORED_KM: |
| status = send_stored_km(hdcp, event_ctx, input); |
| break; |
| case H2_A1_VALIDATE_H_PRIME: |
| status = validate_h_prime(hdcp, event_ctx, input); |
| break; |
| case H2_A2_LOCALITY_CHECK: |
| status = locality_check(hdcp, event_ctx, input); |
| break; |
| case H2_A3_EXCHANGE_KS_AND_TEST_FOR_REPEATER: |
| status = exchange_ks_and_test_for_repeater(hdcp, event_ctx, input); |
| break; |
| case H2_ENABLE_ENCRYPTION: |
| status = enable_encryption(hdcp, event_ctx, input); |
| break; |
| case H2_A5_AUTHENTICATED: |
| status = authenticated(hdcp, event_ctx, input); |
| break; |
| case H2_A6_WAIT_FOR_RX_ID_LIST: |
| status = wait_for_rx_id_list(hdcp, event_ctx, input); |
| break; |
| case H2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: |
| status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); |
| break; |
| case H2_A9_SEND_STREAM_MANAGEMENT: |
| status = send_stream_management(hdcp, event_ctx, input); |
| break; |
| case H2_A9_VALIDATE_STREAM_READY: |
| status = validate_stream_ready(hdcp, event_ctx, input); |
| break; |
| default: |
| status = MOD_HDCP_STATUS_INVALID_STATE; |
| break; |
| } |
| |
| return status; |
| } |
| |
| enum mod_hdcp_status mod_hdcp_hdcp2_dp_execution(struct mod_hdcp *hdcp, |
| struct mod_hdcp_event_context *event_ctx, |
| struct mod_hdcp_transition_input_hdcp2 *input) |
| { |
| enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; |
| |
| switch (current_state(hdcp)) { |
| case D2_A0_DETERMINE_RX_HDCP_CAPABLE: |
| status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input); |
| break; |
| case D2_A1_SEND_AKE_INIT: |
| status = send_ake_init(hdcp, event_ctx, input); |
| break; |
| case D2_A1_VALIDATE_AKE_CERT: |
| status = validate_ake_cert(hdcp, event_ctx, input); |
| break; |
| case D2_A1_SEND_NO_STORED_KM: |
| status = send_no_stored_km(hdcp, event_ctx, input); |
| break; |
| case D2_A1_READ_H_PRIME: |
| status = read_h_prime(hdcp, event_ctx, input); |
| break; |
| case D2_A1_READ_PAIRING_INFO_AND_VALIDATE_H_PRIME: |
| status = read_pairing_info_and_validate_h_prime(hdcp, |
| event_ctx, input); |
| break; |
| case D2_A1_SEND_STORED_KM: |
| status = send_stored_km(hdcp, event_ctx, input); |
| break; |
| case D2_A1_VALIDATE_H_PRIME: |
| status = validate_h_prime(hdcp, event_ctx, input); |
| break; |
| case D2_A2_LOCALITY_CHECK: |
| status = locality_check(hdcp, event_ctx, input); |
| break; |
| case D2_A34_EXCHANGE_KS_AND_TEST_FOR_REPEATER: |
| status = exchange_ks_and_test_for_repeater(hdcp, |
| event_ctx, input); |
| break; |
| case D2_SEND_CONTENT_STREAM_TYPE: |
| status = send_content_stream_type_dp(hdcp, event_ctx, input); |
| break; |
| case D2_ENABLE_ENCRYPTION: |
| status = enable_encryption(hdcp, event_ctx, input); |
| break; |
| case D2_A5_AUTHENTICATED: |
| status = authenticated(hdcp, event_ctx, input); |
| break; |
| case D2_A6_WAIT_FOR_RX_ID_LIST: |
| status = wait_for_rx_id_list(hdcp, event_ctx, input); |
| break; |
| case D2_A78_VERIFY_RX_ID_LIST_AND_SEND_ACK: |
| status = verify_rx_id_list_and_send_ack(hdcp, event_ctx, input); |
| break; |
| case D2_A9_SEND_STREAM_MANAGEMENT: |
| status = send_stream_management(hdcp, event_ctx, input); |
| break; |
| case D2_A9_VALIDATE_STREAM_READY: |
| status = validate_stream_ready(hdcp, event_ctx, input); |
| break; |
| default: |
| status = MOD_HDCP_STATUS_INVALID_STATE; |
| break; |
| } |
| |
| return status; |
| } |
