blob: 20e554e771d1634ba2c2cb14124447adbfe70405 [file] [log] [blame]
/*
* 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 void push_error_status(struct mod_hdcp *hdcp,
enum mod_hdcp_status status)
{
struct mod_hdcp_trace *trace = &hdcp->connection.trace;
if (trace->error_count < MAX_NUM_OF_ERROR_TRACE) {
trace->errors[trace->error_count].status = status;
trace->errors[trace->error_count].state_id = hdcp->state.id;
trace->error_count++;
HDCP_ERROR_TRACE(hdcp, status);
}
if (is_hdcp1(hdcp)) {
hdcp->connection.hdcp1_retry_count++;
} else if (is_hdcp2(hdcp)) {
hdcp->connection.hdcp2_retry_count++;
}
}
static uint8_t is_cp_desired_hdcp1(struct mod_hdcp *hdcp)
{
int i, is_auth_needed = 0;
/* if all displays on the link don't need authentication,
* hdcp is not desired
*/
for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
!hdcp->displays[i].adjust.disable) {
is_auth_needed = 1;
break;
}
}
return (hdcp->connection.hdcp1_retry_count < MAX_NUM_OF_ATTEMPTS) &&
is_auth_needed &&
!hdcp->connection.link.adjust.hdcp1.disable &&
!hdcp->connection.is_hdcp1_revoked;
}
static uint8_t is_cp_desired_hdcp2(struct mod_hdcp *hdcp)
{
int i, is_auth_needed = 0;
/* if all displays on the link don't need authentication,
* hdcp is not desired
*/
for (i = 0; i < MAX_NUM_OF_DISPLAYS; i++) {
if (hdcp->displays[i].state != MOD_HDCP_DISPLAY_INACTIVE &&
!hdcp->displays[i].adjust.disable) {
is_auth_needed = 1;
break;
}
}
return (hdcp->connection.hdcp2_retry_count < MAX_NUM_OF_ATTEMPTS) &&
is_auth_needed &&
!hdcp->connection.link.adjust.hdcp2.disable &&
!hdcp->connection.is_hdcp2_revoked;
}
static enum mod_hdcp_status execution(struct mod_hdcp *hdcp,
struct mod_hdcp_event_context *event_ctx,
union mod_hdcp_transition_input *input)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
if (is_in_initialized_state(hdcp)) {
if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
event_ctx->unexpected_event = 1;
goto out;
}
/* initialize transition input */
memset(input, 0, sizeof(union mod_hdcp_transition_input));
} else if (is_in_cp_not_desired_state(hdcp)) {
if (event_ctx->event != MOD_HDCP_EVENT_CALLBACK) {
event_ctx->unexpected_event = 1;
goto out;
}
} else if (is_in_hdcp1_states(hdcp)) {
status = mod_hdcp_hdcp1_execution(hdcp, event_ctx, &input->hdcp1);
} else if (is_in_hdcp1_dp_states(hdcp)) {
status = mod_hdcp_hdcp1_dp_execution(hdcp,
event_ctx, &input->hdcp1);
} else if (is_in_hdcp2_states(hdcp)) {
status = mod_hdcp_hdcp2_execution(hdcp, event_ctx, &input->hdcp2);
} else if (is_in_hdcp2_dp_states(hdcp)) {
status = mod_hdcp_hdcp2_dp_execution(hdcp,
event_ctx, &input->hdcp2);
} else {
event_ctx->unexpected_event = 1;
goto out;
}
out:
return status;
}
static enum mod_hdcp_status transition(struct mod_hdcp *hdcp,
struct mod_hdcp_event_context *event_ctx,
union mod_hdcp_transition_input *input,
struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
if (event_ctx->unexpected_event)
goto out;
if (is_in_initialized_state(hdcp)) {
if (is_dp_hdcp(hdcp))
if (is_cp_desired_hdcp2(hdcp)) {
callback_in_ms(0, output);
set_state_id(hdcp, output, D2_A0_DETERMINE_RX_HDCP_CAPABLE);
} else if (is_cp_desired_hdcp1(hdcp)) {
callback_in_ms(0, output);
set_state_id(hdcp, output, D1_A0_DETERMINE_RX_HDCP_CAPABLE);
} else {
callback_in_ms(0, output);
set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
}
else if (is_hdmi_dvi_sl_hdcp(hdcp))
if (is_cp_desired_hdcp2(hdcp)) {
callback_in_ms(0, output);
set_state_id(hdcp, output, H2_A0_KNOWN_HDCP2_CAPABLE_RX);
} else if (is_cp_desired_hdcp1(hdcp)) {
callback_in_ms(0, output);
set_state_id(hdcp, output, H1_A0_WAIT_FOR_ACTIVE_RX);
} else {
callback_in_ms(0, output);
set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
}
else {
callback_in_ms(0, output);
set_state_id(hdcp, output, HDCP_CP_NOT_DESIRED);
}
} else if (is_in_cp_not_desired_state(hdcp)) {
increment_stay_counter(hdcp);
} else if (is_in_hdcp1_states(hdcp)) {
status = mod_hdcp_hdcp1_transition(hdcp,
event_ctx, &input->hdcp1, output);
} else if (is_in_hdcp1_dp_states(hdcp)) {
status = mod_hdcp_hdcp1_dp_transition(hdcp,
event_ctx, &input->hdcp1, output);
} else if (is_in_hdcp2_states(hdcp)) {
status = mod_hdcp_hdcp2_transition(hdcp,
event_ctx, &input->hdcp2, output);
} else if (is_in_hdcp2_dp_states(hdcp)) {
status = mod_hdcp_hdcp2_dp_transition(hdcp,
event_ctx, &input->hdcp2, output);
} else {
status = MOD_HDCP_STATUS_INVALID_STATE;
}
out:
return status;
}
static enum mod_hdcp_status reset_authentication(struct mod_hdcp *hdcp,
struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
if (is_hdcp1(hdcp)) {
if (hdcp->auth.trans_input.hdcp1.create_session != UNKNOWN) {
/* TODO - update psp to unify create session failure
* recovery between hdcp1 and 2.
*/
mod_hdcp_hdcp1_destroy_session(hdcp);
}
HDCP_TOP_RESET_AUTH_TRACE(hdcp);
memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
set_state_id(hdcp, output, HDCP_INITIALIZED);
} else if (is_hdcp2(hdcp)) {
if (hdcp->auth.trans_input.hdcp2.create_session == PASS) {
status = mod_hdcp_hdcp2_destroy_session(hdcp);
if (status != MOD_HDCP_STATUS_SUCCESS) {
output->callback_needed = 0;
output->watchdog_timer_needed = 0;
goto out;
}
}
HDCP_TOP_RESET_AUTH_TRACE(hdcp);
memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
set_state_id(hdcp, output, HDCP_INITIALIZED);
} else if (is_in_cp_not_desired_state(hdcp)) {
HDCP_TOP_RESET_AUTH_TRACE(hdcp);
memset(&hdcp->auth, 0, sizeof(struct mod_hdcp_authentication));
memset(&hdcp->state, 0, sizeof(struct mod_hdcp_state));
set_state_id(hdcp, output, HDCP_INITIALIZED);
}
out:
/* stop callback and watchdog requests from previous authentication*/
output->watchdog_timer_stop = 1;
output->callback_stop = 1;
return status;
}
static enum mod_hdcp_status reset_connection(struct mod_hdcp *hdcp,
struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
memset(output, 0, sizeof(struct mod_hdcp_output));
status = reset_authentication(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)
goto out;
if (current_state(hdcp) != HDCP_UNINITIALIZED) {
HDCP_TOP_RESET_CONN_TRACE(hdcp);
set_state_id(hdcp, output, HDCP_UNINITIALIZED);
}
memset(&hdcp->connection, 0, sizeof(hdcp->connection));
out:
return status;
}
/*
* Implementation of functions in mod_hdcp.h
*/
size_t mod_hdcp_get_memory_size(void)
{
return sizeof(struct mod_hdcp);
}
enum mod_hdcp_status mod_hdcp_setup(struct mod_hdcp *hdcp,
struct mod_hdcp_config *config)
{
struct mod_hdcp_output output;
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
memset(hdcp, 0, sizeof(struct mod_hdcp));
memset(&output, 0, sizeof(output));
hdcp->config = *config;
HDCP_TOP_INTERFACE_TRACE(hdcp);
status = reset_connection(hdcp, &output);
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
return status;
}
enum mod_hdcp_status mod_hdcp_teardown(struct mod_hdcp *hdcp)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
struct mod_hdcp_output output;
HDCP_TOP_INTERFACE_TRACE(hdcp);
memset(&output, 0, sizeof(output));
status = reset_connection(hdcp, &output);
if (status == MOD_HDCP_STATUS_SUCCESS)
memset(hdcp, 0, sizeof(struct mod_hdcp));
else
push_error_status(hdcp, status);
return status;
}
enum mod_hdcp_status mod_hdcp_add_display(struct mod_hdcp *hdcp,
struct mod_hdcp_link *link, struct mod_hdcp_display *display,
struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
struct mod_hdcp_display *display_container = NULL;
HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, display->index);
memset(output, 0, sizeof(struct mod_hdcp_output));
/* skip inactive display */
if (display->state != MOD_HDCP_DISPLAY_ACTIVE) {
status = MOD_HDCP_STATUS_SUCCESS;
goto out;
}
/* check existing display container */
if (get_active_display_at_index(hdcp, display->index)) {
status = MOD_HDCP_STATUS_SUCCESS;
goto out;
}
/* find an empty display container */
display_container = get_empty_display_container(hdcp);
if (!display_container) {
status = MOD_HDCP_STATUS_DISPLAY_OUT_OF_BOUND;
goto out;
}
/* reset existing authentication status */
status = reset_authentication(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)
goto out;
/* reset retry counters */
reset_retry_counts(hdcp);
/* reset error trace */
memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace));
/* add display to connection */
hdcp->connection.link = *link;
*display_container = *display;
status = mod_hdcp_add_display_to_topology(hdcp, display_container);
if (status != MOD_HDCP_STATUS_SUCCESS)
goto out;
/* request authentication */
if (current_state(hdcp) != HDCP_INITIALIZED)
set_state_id(hdcp, output, HDCP_INITIALIZED);
callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000, output);
out:
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
return status;
}
enum mod_hdcp_status mod_hdcp_remove_display(struct mod_hdcp *hdcp,
uint8_t index, struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
struct mod_hdcp_display *display = NULL;
HDCP_TOP_INTERFACE_TRACE_WITH_INDEX(hdcp, index);
memset(output, 0, sizeof(struct mod_hdcp_output));
/* find display in connection */
display = get_active_display_at_index(hdcp, index);
if (!display) {
status = MOD_HDCP_STATUS_SUCCESS;
goto out;
}
/* stop current authentication */
status = reset_authentication(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)
goto out;
/* clear retry counters */
reset_retry_counts(hdcp);
/* reset error trace */
memset(&hdcp->connection.trace, 0, sizeof(hdcp->connection.trace));
/* remove display */
status = mod_hdcp_remove_display_from_topology(hdcp, index);
if (status != MOD_HDCP_STATUS_SUCCESS)
goto out;
memset(display, 0, sizeof(struct mod_hdcp_display));
/* request authentication when connection is not reset */
if (current_state(hdcp) != HDCP_UNINITIALIZED)
callback_in_ms(hdcp->connection.link.adjust.auth_delay * 1000,
output);
out:
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
return status;
}
enum mod_hdcp_status mod_hdcp_query_display(struct mod_hdcp *hdcp,
uint8_t index, struct mod_hdcp_display_query *query)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
struct mod_hdcp_display *display = NULL;
/* find display in connection */
display = get_active_display_at_index(hdcp, index);
if (!display) {
status = MOD_HDCP_STATUS_DISPLAY_NOT_FOUND;
goto out;
}
/* populate query */
query->link = &hdcp->connection.link;
query->display = display;
query->trace = &hdcp->connection.trace;
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
if (is_display_encryption_enabled(display)) {
if (is_hdcp1(hdcp)) {
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP1_ON;
} else if (is_hdcp2(hdcp)) {
if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_0)
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE0_ON;
else if (query->link->adjust.hdcp2.force_type == MOD_HDCP_FORCE_TYPE_1)
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_TYPE1_ON;
else
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP2_ON;
}
} else {
query->encryption_status = MOD_HDCP_ENCRYPTION_STATUS_HDCP_OFF;
}
out:
return status;
}
enum mod_hdcp_status mod_hdcp_reset_connection(struct mod_hdcp *hdcp,
struct mod_hdcp_output *output)
{
enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
HDCP_TOP_INTERFACE_TRACE(hdcp);
status = reset_connection(hdcp, output);
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
return status;
}
enum mod_hdcp_status mod_hdcp_process_event(struct mod_hdcp *hdcp,
enum mod_hdcp_event event, struct mod_hdcp_output *output)
{
enum mod_hdcp_status exec_status, trans_status, reset_status, status;
struct mod_hdcp_event_context event_ctx;
HDCP_EVENT_TRACE(hdcp, event);
memset(output, 0, sizeof(struct mod_hdcp_output));
memset(&event_ctx, 0, sizeof(struct mod_hdcp_event_context));
event_ctx.event = event;
/* execute and transition */
exec_status = execution(hdcp, &event_ctx, &hdcp->auth.trans_input);
trans_status = transition(
hdcp, &event_ctx, &hdcp->auth.trans_input, output);
if (trans_status == MOD_HDCP_STATUS_SUCCESS) {
status = MOD_HDCP_STATUS_SUCCESS;
} else if (exec_status == MOD_HDCP_STATUS_SUCCESS) {
status = MOD_HDCP_STATUS_INTERNAL_POLICY_FAILURE;
push_error_status(hdcp, status);
} else {
status = exec_status;
push_error_status(hdcp, status);
}
/* reset authentication if needed */
if (trans_status == MOD_HDCP_STATUS_RESET_NEEDED) {
HDCP_FULL_DDC_TRACE(hdcp);
reset_status = reset_authentication(hdcp, output);
if (reset_status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, reset_status);
}
/* Clear CP_IRQ status if needed */
if (event_ctx.event == MOD_HDCP_EVENT_CPIRQ) {
status = mod_hdcp_clear_cp_irq_status(hdcp);
if (status != MOD_HDCP_STATUS_SUCCESS)
push_error_status(hdcp, status);
}
return status;
}
enum mod_hdcp_operation_mode mod_hdcp_signal_type_to_operation_mode(
enum signal_type signal)
{
enum mod_hdcp_operation_mode mode = MOD_HDCP_MODE_OFF;
switch (signal) {
case SIGNAL_TYPE_DVI_SINGLE_LINK:
case SIGNAL_TYPE_HDMI_TYPE_A:
mode = MOD_HDCP_MODE_DEFAULT;
break;
case SIGNAL_TYPE_EDP:
case SIGNAL_TYPE_DISPLAY_PORT:
case SIGNAL_TYPE_DISPLAY_PORT_MST:
mode = MOD_HDCP_MODE_DP;
break;
default:
break;
}
return mode;
}