536 lines
16 KiB
C
536 lines
16 KiB
C
/*
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* Copyright 2019 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#include "hdcp.h"
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static inline enum mod_hdcp_status validate_bksv(struct mod_hdcp *hdcp)
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{
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uint64_t n = 0;
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uint8_t count = 0;
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u8 bksv[sizeof(n)] = { };
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memcpy(bksv, hdcp->auth.msg.hdcp1.bksv, sizeof(hdcp->auth.msg.hdcp1.bksv));
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n = *(uint64_t *)bksv;
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while (n) {
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count++;
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n &= (n - 1);
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}
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return (count == 20) ? MOD_HDCP_STATUS_SUCCESS :
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MOD_HDCP_STATUS_HDCP1_INVALID_BKSV;
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}
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static inline enum mod_hdcp_status check_ksv_ready(struct mod_hdcp *hdcp)
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{
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if (is_dp_hdcp(hdcp))
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return (hdcp->auth.msg.hdcp1.bstatus & DP_BSTATUS_READY) ?
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MOD_HDCP_STATUS_SUCCESS :
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MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY;
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return (hdcp->auth.msg.hdcp1.bcaps & DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY) ?
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MOD_HDCP_STATUS_SUCCESS :
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MOD_HDCP_STATUS_HDCP1_KSV_LIST_NOT_READY;
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}
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static inline enum mod_hdcp_status check_hdcp_capable_dp(struct mod_hdcp *hdcp)
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{
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return (hdcp->auth.msg.hdcp1.bcaps & DP_BCAPS_HDCP_CAPABLE) ?
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MOD_HDCP_STATUS_SUCCESS :
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MOD_HDCP_STATUS_HDCP1_NOT_CAPABLE;
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}
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static inline enum mod_hdcp_status check_r0p_available_dp(struct mod_hdcp *hdcp)
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{
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enum mod_hdcp_status status;
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if (is_dp_hdcp(hdcp)) {
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status = (hdcp->auth.msg.hdcp1.bstatus &
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DP_BSTATUS_R0_PRIME_READY) ?
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MOD_HDCP_STATUS_SUCCESS :
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MOD_HDCP_STATUS_HDCP1_R0_PRIME_PENDING;
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} else {
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status = MOD_HDCP_STATUS_INVALID_OPERATION;
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}
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return status;
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}
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static inline enum mod_hdcp_status check_link_integrity_dp(
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struct mod_hdcp *hdcp)
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{
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return (hdcp->auth.msg.hdcp1.bstatus &
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DP_BSTATUS_LINK_FAILURE) ?
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MOD_HDCP_STATUS_HDCP1_LINK_INTEGRITY_FAILURE :
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MOD_HDCP_STATUS_SUCCESS;
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}
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static inline enum mod_hdcp_status check_no_reauthentication_request_dp(
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struct mod_hdcp *hdcp)
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{
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return (hdcp->auth.msg.hdcp1.bstatus & DP_BSTATUS_REAUTH_REQ) ?
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MOD_HDCP_STATUS_HDCP1_REAUTH_REQUEST_ISSUED :
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MOD_HDCP_STATUS_SUCCESS;
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}
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static inline enum mod_hdcp_status check_no_max_cascade(struct mod_hdcp *hdcp)
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{
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enum mod_hdcp_status status;
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if (is_dp_hdcp(hdcp))
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status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.binfo_dp >> 8)
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? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
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: MOD_HDCP_STATUS_SUCCESS;
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else
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status = DRM_HDCP_MAX_CASCADE_EXCEEDED(hdcp->auth.msg.hdcp1.bstatus >> 8)
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? MOD_HDCP_STATUS_HDCP1_MAX_CASCADE_EXCEEDED_FAILURE
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: MOD_HDCP_STATUS_SUCCESS;
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return status;
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}
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static inline enum mod_hdcp_status check_no_max_devs(struct mod_hdcp *hdcp)
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{
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enum mod_hdcp_status status;
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if (is_dp_hdcp(hdcp))
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status = DRM_HDCP_MAX_DEVICE_EXCEEDED(hdcp->auth.msg.hdcp1.binfo_dp) ?
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MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE :
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MOD_HDCP_STATUS_SUCCESS;
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else
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status = DRM_HDCP_MAX_DEVICE_EXCEEDED(hdcp->auth.msg.hdcp1.bstatus) ?
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MOD_HDCP_STATUS_HDCP1_MAX_DEVS_EXCEEDED_FAILURE :
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MOD_HDCP_STATUS_SUCCESS;
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return status;
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}
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static inline uint8_t get_device_count(struct mod_hdcp *hdcp)
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{
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return is_dp_hdcp(hdcp) ?
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DRM_HDCP_NUM_DOWNSTREAM(hdcp->auth.msg.hdcp1.binfo_dp) :
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DRM_HDCP_NUM_DOWNSTREAM(hdcp->auth.msg.hdcp1.bstatus);
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}
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static inline enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp)
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{
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/* Avoid device count == 0 to do authentication */
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if (0 == get_device_count(hdcp)) {
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return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE;
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}
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/* Some MST display may choose to report the internal panel as an HDCP RX.
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* To update this condition with 1(because the immediate repeater's internal
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* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp).
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* Device count must be greater than or equal to tracked hdcp displays.
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*/
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return ((1 + get_device_count(hdcp)) < get_active_display_count(hdcp)) ?
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MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE :
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MOD_HDCP_STATUS_SUCCESS;
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}
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static enum mod_hdcp_status wait_for_active_rx(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
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&input->bksv_read, &status,
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hdcp, "bksv_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
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&input->bcaps_read, &status,
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hdcp, "bcaps_read"))
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goto out;
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out:
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return status;
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}
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static enum mod_hdcp_status exchange_ksvs(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_create_session,
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&input->create_session, &status,
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hdcp, "create_session"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_write_an,
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&input->an_write, &status,
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hdcp, "an_write"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_write_aksv,
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&input->aksv_write, &status,
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hdcp, "aksv_write"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bksv,
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&input->bksv_read, &status,
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hdcp, "bksv_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(validate_bksv,
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&input->bksv_validation, &status,
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hdcp, "bksv_validation"))
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goto out;
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if (hdcp->auth.msg.hdcp1.ainfo) {
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if (!mod_hdcp_execute_and_set(mod_hdcp_write_ainfo,
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&input->ainfo_write, &status,
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hdcp, "ainfo_write"))
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goto out;
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}
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out:
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return status;
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}
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static enum mod_hdcp_status computations_validate_rx_test_for_repeater(
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struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_r0p,
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&input->r0p_read, &status,
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hdcp, "r0p_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_rx,
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&input->rx_validation, &status,
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hdcp, "rx_validation"))
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goto out;
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if (hdcp->connection.is_repeater) {
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if (!hdcp->connection.link.adjust.hdcp1.postpone_encryption)
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if (!mod_hdcp_execute_and_set(
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mod_hdcp_hdcp1_enable_encryption,
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&input->encryption, &status,
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hdcp, "encryption"))
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goto out;
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} else {
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if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
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&input->encryption, &status,
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hdcp, "encryption"))
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goto out;
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if (is_dp_mst_hdcp(hdcp))
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if (!mod_hdcp_execute_and_set(
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mod_hdcp_hdcp1_enable_dp_stream_encryption,
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&input->stream_encryption_dp, &status,
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hdcp, "stream_encryption_dp"))
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goto out;
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}
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out:
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return status;
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}
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static enum mod_hdcp_status authenticated(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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mod_hdcp_execute_and_set(mod_hdcp_hdcp1_link_maintenance,
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&input->link_maintenance, &status,
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hdcp, "link_maintenance");
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out:
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return status;
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}
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static enum mod_hdcp_status wait_for_ready(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK &&
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event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
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event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (is_dp_hdcp(hdcp)) {
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
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&input->bstatus_read, &status,
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hdcp, "bstatus_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_link_integrity_dp,
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&input->link_integrity_check, &status,
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hdcp, "link_integrity_check"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
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&input->reauth_request_check, &status,
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hdcp, "reauth_request_check"))
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goto out;
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} else {
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
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&input->bcaps_read, &status,
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hdcp, "bcaps_read"))
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goto out;
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}
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if (!mod_hdcp_execute_and_set(check_ksv_ready,
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&input->ready_check, &status,
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hdcp, "ready_check"))
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goto out;
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out:
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return status;
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}
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static enum mod_hdcp_status read_ksv_list(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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uint8_t device_count;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (is_dp_hdcp(hdcp)) {
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_binfo,
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&input->binfo_read_dp, &status,
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hdcp, "binfo_read_dp"))
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goto out;
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} else {
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
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&input->bstatus_read, &status,
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hdcp, "bstatus_read"))
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goto out;
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}
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if (!mod_hdcp_execute_and_set(check_no_max_cascade,
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&input->max_cascade_check, &status,
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hdcp, "max_cascade_check"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_no_max_devs,
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&input->max_devs_check, &status,
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hdcp, "max_devs_check"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_device_count,
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&input->device_count_check, &status,
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hdcp, "device_count_check"))
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goto out;
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device_count = get_device_count(hdcp);
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hdcp->auth.msg.hdcp1.ksvlist_size = device_count*5;
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_ksvlist,
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&input->ksvlist_read, &status,
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hdcp, "ksvlist_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_vp,
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&input->vp_read, &status,
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hdcp, "vp_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_validate_ksvlist_vp,
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&input->ksvlist_vp_validation, &status,
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hdcp, "ksvlist_vp_validation"))
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goto out;
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if (input->encryption != PASS)
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if (!mod_hdcp_execute_and_set(mod_hdcp_hdcp1_enable_encryption,
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&input->encryption, &status,
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hdcp, "encryption"))
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goto out;
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if (is_dp_mst_hdcp(hdcp))
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if (!mod_hdcp_execute_and_set(
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mod_hdcp_hdcp1_enable_dp_stream_encryption,
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&input->stream_encryption_dp, &status,
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hdcp, "stream_encryption_dp"))
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goto out;
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out:
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return status;
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}
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static enum mod_hdcp_status determine_rx_hdcp_capable_dp(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bcaps,
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&input->bcaps_read, &status,
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hdcp, "bcaps_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_hdcp_capable_dp,
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&input->hdcp_capable_dp, &status,
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hdcp, "hdcp_capable_dp"))
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goto out;
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out:
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return status;
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}
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static enum mod_hdcp_status wait_for_r0_prime_dp(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ &&
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event_ctx->event != MOD_HDCP_EVENT_WATCHDOG_TIMEOUT) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (!mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
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&input->bstatus_read, &status,
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hdcp, "bstatus_read"))
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goto out;
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if (!mod_hdcp_execute_and_set(check_r0p_available_dp,
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&input->r0p_available_dp, &status,
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hdcp, "r0p_available_dp"))
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goto out;
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out:
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return status;
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}
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static enum mod_hdcp_status authenticated_dp(struct mod_hdcp *hdcp,
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struct mod_hdcp_event_context *event_ctx,
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struct mod_hdcp_transition_input_hdcp1 *input)
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{
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enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
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if (event_ctx->event != MOD_HDCP_EVENT_CPIRQ) {
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event_ctx->unexpected_event = 1;
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goto out;
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}
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if (status == MOD_HDCP_STATUS_SUCCESS)
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mod_hdcp_execute_and_set(mod_hdcp_read_bstatus,
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&input->bstatus_read, &status,
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hdcp, "bstatus_read");
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if (status == MOD_HDCP_STATUS_SUCCESS)
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mod_hdcp_execute_and_set(check_link_integrity_dp,
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&input->link_integrity_check, &status,
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hdcp, "link_integrity_check");
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if (status == MOD_HDCP_STATUS_SUCCESS)
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mod_hdcp_execute_and_set(check_no_reauthentication_request_dp,
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&input->reauth_request_check, &status,
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hdcp, "reauth_request_check");
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out:
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return status;
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}
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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_AUTHENTICATED:
|
|
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;
|
|
}
|
|
|
|
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_AUTHENTICATED:
|
|
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;
|
|
}
|