diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c | 531 |
1 files changed, 531 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c new file mode 100644 index 000000000000..9e7302eac299 --- /dev/null +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c @@ -0,0 +1,531 @@ +/* + * Copyright 2019 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 "hdcp.h" + +static inline enum mod_hdcp_status validate_bksv(struct mod_hdcp *hdcp) +{ + uint64_t n = *(uint64_t *)hdcp->auth.msg.hdcp1.bksv; + uint8_t count = 0; + + while (n) { + count++; + n &= (n - 1); + } + return (count == 20) ? MOD_HDCP_STATUS_SUCCESS : + MOD_HDCP_STATUS_HDCP1_INVALID_BKSV; +} + +static inline enum mod_hdcp_status check_ksv_ready(struct mod_hdcp *hdcp) +{ + if (is_dp_hdcp(hdcp)) + return (hdcp->auth.msg.hdcp1.bstatus & BSTATUS_READY_MASK_DP) ? + MOD_HDCP_STATUS_SUCCESS : + MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY; + return (hdcp->auth.msg.hdcp1.bcaps & BCAPS_READY_MASK) ? + MOD_HDCP_STATUS_SUCCESS : + MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY; +} + +static inline enum mod_hdcp_status check_hdcp_capable_dp(struct mod_hdcp *hdcp) +{ + return (hdcp->auth.msg.hdcp1.bcaps & BCAPS_HDCP_CAPABLE_MASK_DP) ? + MOD_HDCP_STATUS_SUCCESS : + MOD_HDCP_STATUS_HDCP1_NOT_CAPABLE; +} + +static inline enum mod_hdcp_status check_r0p_available_dp(struct mod_hdcp *hdcp) +{ + enum mod_hdcp_status status; + if (is_dp_hdcp(hdcp)) { + status = (hdcp->auth.msg.hdcp1.bstatus & + BSTATUS_R0_P_AVAILABLE_MASK_DP) ? + MOD_HDCP_STATUS_SUCCESS : + MOD_HDCP_STATUS_HDCP1_R0_PRIME_PENDING; + } else { + status = MOD_HDCP_STATUS_INVALID_OPERATION; + } + return status; +} + +static inline enum mod_hdcp_status check_link_integrity_dp( + struct mod_hdcp *hdcp) +{ + return (hdcp->auth.msg.hdcp1.bstatus & + BSTATUS_LINK_INTEGRITY_FAILURE_MASK_DP) ? + MOD_HDCP_STATUS_HDCP1_LINK_INTEGRITY_FAILURE : + MOD_HDCP_STATUS_SUCCESS; +} + +static inline enum mod_hdcp_status check_no_reauthentication_request_dp( + struct mod_hdcp *hdcp) +{ + return (hdcp->auth.msg.hdcp1.bstatus & BSTATUS_REAUTH_REQUEST_MASK_DP) ? + MOD_HDCP_STATUS_HDCP1_REAUTH_REQUEST_ISSUED : + MOD_HDCP_STATUS_SUCCESS; +} + +static inline enum mod_hdcp_status check_no_max_cascade(struct mod_hdcp *hdcp) +{ + enum mod_hdcp_status status; + + if (is_dp_hdcp(hdcp)) + status = (hdcp->auth.msg.hdcp1.binfo_dp & + BINFO_MAX_CASCADE_EXCEEDED_MASK_DP) ? + MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE : + MOD_HDCP_STATUS_SUCCESS; + else + status = (hdcp->auth.msg.hdcp1.bstatus & + BSTATUS_MAX_CASCADE_EXCEEDED_MASK) ? + MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE : + MOD_HDCP_STATUS_SUCCESS; + return status; +} + +static inline enum mod_hdcp_status check_no_max_devs(struct mod_hdcp *hdcp) +{ + enum mod_hdcp_status status; + + if (is_dp_hdcp(hdcp)) + status = (hdcp->auth.msg.hdcp1.binfo_dp & + BINFO_MAX_DEVS_EXCEEDED_MASK_DP) ? + MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE : + MOD_HDCP_STATUS_SUCCESS; + else + status = (hdcp->auth.msg.hdcp1.bstatus & + BSTATUS_MAX_DEVS_EXCEEDED_MASK) ? + MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE : + MOD_HDCP_STATUS_SUCCESS; + return status; +} + +static inline uint8_t get_device_count(struct mod_hdcp *hdcp) +{ + return is_dp_hdcp(hdcp) ? + (hdcp->auth.msg.hdcp1.binfo_dp & BINFO_DEVICE_COUNT_MASK_DP) : + (hdcp->auth.msg.hdcp1.bstatus & BSTATUS_DEVICE_COUNT_MASK); +} + +static inline enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp) +{ + /* device count must be greater than or equal to tracked hdcp displays */ + return (get_device_count(hdcp) < get_added_display_count(hdcp)) ? + MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE : + MOD_HDCP_STATUS_SUCCESS; +} + +static enum mod_hdcp_status wait_for_active_rx(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *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_bksv, + &input->bksv_read, &status, + hdcp, "bksv_read")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps, + &input->bcaps_read, &status, + hdcp, "bcaps_read")) + goto out; +out: + return status; +} + +static enum mod_hdcp_status exchange_ksvs(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *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_add_display_topology, + &input->add_topology, &status, + hdcp, "add_topology")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_create_session, + &input->create_session, &status, + hdcp, "create_session")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_write_an, + &input->an_write, &status, + hdcp, "an_write")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_write_aksv, + &input->aksv_write, &status, + hdcp, "aksv_write")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv, + &input->bksv_read, &status, + hdcp, "bksv_read")) + goto out; + if (!mod_hdcp_execute_and_set(validate_bksv, + &input->bksv_validation, &status, + hdcp, "bksv_validation")) + goto out; + if (hdcp->auth.msg.hdcp1.ainfo) { + if (!mod_hdcp_execute_and_set(mod_hdcp_write_ainfo, + &input->ainfo_write, &status, + hdcp, "ainfo_write")) + goto out; + } +out: + return status; +} + +static enum mod_hdcp_status computations_validate_rx_test_for_repeater( + struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *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_r0p, + &input->r0p_read, &status, + hdcp, "r0p_read")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_rx, + &input->rx_validation, &status, + hdcp, "rx_validation")) + goto out; + if (hdcp->connection.is_repeater) { + if (!hdcp->connection.link.adjust.hdcp1.postpone_encryption) + if (!mod_hdcp_execute_and_set( + mod_hdcp_hdcp1_enable_encryption, + &input->encryption, &status, + hdcp, "encryption")) + goto out; + } else { + if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption, + &input->encryption, &status, + hdcp, "encryption")) + goto out; + if (is_dp_mst_hdcp(hdcp)) + if (!mod_hdcp_execute_and_set( + mod_hdcp_hdcp1_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_hdcp1 *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_hdcp1_link_maintenance, + &input->link_maintenance, &status, + hdcp, "link_maintenance")) + goto out; +out: + return status; +} + +static enum mod_hdcp_status wait_for_ready(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *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 (is_dp_hdcp(hdcp)) { + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus, + &input->bstatus_read, &status, + hdcp, "bstatus_read")) + goto out; + if (!mod_hdcp_execute_and_set(check_link_integrity_dp, + &input->link_integiry_check, &status, + hdcp, "link_integiry_check")) + goto out; + if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp, + &input->reauth_request_check, &status, + hdcp, "reauth_request_check")) + goto out; + } else { + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps, + &input->bcaps_read, &status, + hdcp, "bcaps_read")) + goto out; + } + if (!mod_hdcp_execute_and_set(check_ksv_ready, + &input->ready_check, &status, + hdcp, "ready_check")) + goto out; +out: + return status; +} + +static enum mod_hdcp_status read_ksv_list(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + uint8_t device_count; + + if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) { + event_ctx->unexpected_event = 1; + goto out; + } + + if (is_dp_hdcp(hdcp)) { + if (!mod_hdcp_execute_and_set(mod_hdcp_read_binfo, + &input->binfo_read_dp, &status, + hdcp, "binfo_read_dp")) + goto out; + } else { + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus, + &input->bstatus_read, &status, + hdcp, "bstatus_read")) + goto out; + } + if (!mod_hdcp_execute_and_set(check_no_max_cascade, + &input->max_cascade_check, &status, + hdcp, "max_cascade_check")) + goto out; + if (!mod_hdcp_execute_and_set(check_no_max_devs, + &input->max_devs_check, &status, + hdcp, "max_devs_check")) + goto out; + if (!mod_hdcp_execute_and_set(check_device_count, + &input->device_count_check, &status, + hdcp, "device_count_check")) + goto out; + device_count = get_device_count(hdcp); + hdcp->auth.msg.hdcp1.ksvlist_size = device_count*5; + if (!mod_hdcp_execute_and_set(mod_hdcp_read_ksvlist, + &input->ksvlist_read, &status, + hdcp, "ksvlist_read")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_read_vp, + &input->vp_read, &status, + hdcp, "vp_read")) + goto out; + if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_ksvlist_vp, + &input->ksvlist_vp_validation, &status, + hdcp, "ksvlist_vp_validation")) + goto out; + if (input->encryption != PASS) + if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption, + &input->encryption, &status, + hdcp, "encryption")) + goto out; + if (is_dp_mst_hdcp(hdcp)) + if (!mod_hdcp_execute_and_set( + mod_hdcp_hdcp1_enable_dp_stream_encryption, + &input->stream_encryption_dp, &status, + hdcp, "stream_encryption_dp")) + 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_hdcp1 *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_bcaps, + &input->bcaps_read, &status, + hdcp, "bcaps_read")) + goto out; + if (!mod_hdcp_execute_and_set(check_hdcp_capable_dp, + &input->hdcp_capable_dp, &status, + hdcp, "hdcp_capable_dp")) + goto out; +out: + return status; +} + +static enum mod_hdcp_status wait_for_r0_prime_dp(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + + if (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(mod_hdcp_read_bstatus, + &input->bstatus_read, &status, + hdcp, "bstatus_read")) + goto out; + if (!mod_hdcp_execute_and_set(check_r0p_available_dp, + &input->r0p_available_dp, &status, + hdcp, "r0p_available_dp")) + goto out; +out: + return status; +} + +static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + + if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ) { + event_ctx->unexpected_event = 1; + goto out; + } + + if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus, + &input->bstatus_read, &status, + hdcp, "bstatus_read")) + goto out; + if (!mod_hdcp_execute_and_set(check_link_integrity_dp, + &input->link_integiry_check, &status, + hdcp, "link_integiry_check")) + goto out; + if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp, + &input->reauth_request_check, &status, + hdcp, "reauth_request_check")) + goto out; +out: + return status; +} + +uint8_t mod_hdcp_execute_and_set( + mod_hdcp_action func, uint8_t *flag, + enum mod_hdcp_status *status, struct mod_hdcp *hdcp, char *str) +{ + *status = func(hdcp); + if (*status == MOD_HDCP_STATUS_SUCCESS && *flag != PASS) { + HDCP_INPUT_PASS_TRACE(hdcp, str); + *flag = PASS; + } else if (*status != MOD_HDCP_STATUS_SUCCESS && *flag != FAIL) { + HDCP_INPUT_FAIL_TRACE(hdcp, str); + *flag = FAIL; + } + return (*status == MOD_HDCP_STATUS_SUCCESS); +} + +enum mod_hdcp_status mod_hdcp_hdcp1_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + + switch (current_state(hdcp)) { + case H1_A0_WAIT_FOR_ACTIVE_RX: + status = wait_for_active_rx(hdcp, event_ctx, input); + break; + case H1_A1_EXCHANGE_KSVS: + status = exchange_ksvs(hdcp, event_ctx, input); + break; + case H1_A2_COMPUTATIONS_A3_VALIDATE_RX_A6_TEST_FOR_REPEATER: + status = computations_validate_rx_test_for_repeater(hdcp, + event_ctx, input); + break; + case H1_A45_AUTHENICATED: + status = authenticated(hdcp, event_ctx, input); + break; + case H1_A8_WAIT_FOR_READY: + status = wait_for_ready(hdcp, event_ctx, input); + break; + case H1_A9_READ_KSV_LIST: + status = read_ksv_list(hdcp, event_ctx, input); + break; + default: + status = MOD_HDCP_STATUS_INVALID_STATE; + break; + } + + return status; +} + +extern enum mod_hdcp_status mod_hdcp_hdcp1_dp_execution(struct mod_hdcp *hdcp, + struct mod_hdcp_event_context *event_ctx, + struct mod_hdcp_transition_input_hdcp1 *input) +{ + enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS; + + switch (current_state(hdcp)) { + case D1_A0_DETERMINE_RX_HDCP_CAPABLE: + status = determine_rx_hdcp_capable_dp(hdcp, event_ctx, input); + break; + case D1_A1_EXCHANGE_KSVS: + status = exchange_ksvs(hdcp, event_ctx, input); + break; + case D1_A23_WAIT_FOR_R0_PRIME: + status = wait_for_r0_prime_dp(hdcp, event_ctx, input); + break; + case D1_A2_COMPUTATIONS_A3_VALIDATE_RX_A5_TEST_FOR_REPEATER: + status = computations_validate_rx_test_for_repeater( + hdcp, event_ctx, input); + break; + case D1_A4_AUTHENICATED: + status = authenticated_dp(hdcp, event_ctx, input); + break; + case D1_A6_WAIT_FOR_READY: + status = wait_for_ready(hdcp, event_ctx, input); + break; + case D1_A7_READ_KSV_LIST: + status = read_ksv_list(hdcp, event_ctx, input); + break; + default: + status = MOD_HDCP_STATUS_INVALID_STATE; + break; + } + + return status; +} |