83be05256b
This adds config option to specify static roles for master and slave in the Best Master Clock Algorithm. This is the case for Automotive Profile where networks are mostly static and role for each device is known in advance. masterOnly and slaveOnly will be used to determine the roles for the devices. Since masterOnly is a per-port config and slaveOnly is a global config option, role assignment will be slightly odd in case of bridges. If slaveOnly is set to 1, all the ports will be in slave roles except for the ones where masterOnly is set to 1. These ports will assume the master role. Two new FSMs which will be used for master and slave roles for this config option have also been added. Signed-off-by: Vedang Patel <vedang.patel@intel.com>
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/**
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* @file fsm.h
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* @brief The finite state machine for ports on boundary and ordinary clocks.
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* @note Copyright (C) 2011 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef HAVE_FSM_H
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#define HAVE_FSM_H
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/** Defines the state of a port. */
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enum port_state {
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PS_INITIALIZING = 1,
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PS_FAULTY,
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PS_DISABLED,
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PS_LISTENING,
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PS_PRE_MASTER,
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PS_MASTER,
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PS_PASSIVE,
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PS_UNCALIBRATED,
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PS_SLAVE,
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PS_GRAND_MASTER, /*non-standard extension*/
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};
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/** Defines the events for the port state machine. */
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enum fsm_event {
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EV_NONE,
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EV_POWERUP,
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EV_INITIALIZE,
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EV_DESIGNATED_ENABLED,
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EV_DESIGNATED_DISABLED,
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EV_FAULT_CLEARED,
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EV_FAULT_DETECTED,
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EV_STATE_DECISION_EVENT,
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EV_QUALIFICATION_TIMEOUT_EXPIRES,
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EV_ANNOUNCE_RECEIPT_TIMEOUT_EXPIRES,
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EV_SYNCHRONIZATION_FAULT,
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EV_MASTER_CLOCK_SELECTED,
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EV_INIT_COMPLETE,
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EV_RS_MASTER,
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EV_RS_GRAND_MASTER,
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EV_RS_SLAVE,
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EV_RS_PASSIVE,
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};
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enum bmca_select {
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BMCA_PTP,
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BMCA_NOOP,
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};
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/**
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* Run the state machine for a BC or OC port.
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* @param state The current state of the port.
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* @param event The event to be processed.
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* @param mdiff Whether a new master has been selected.
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* @return The new state for the port.
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*/
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enum port_state ptp_fsm(enum port_state state, enum fsm_event event, int mdiff);
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/**
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* Run the state machine for a slave only clock.
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* @param state The current state of the port.
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* @param event The event to be processed.
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* @param mdiff Whether a new master has been selected.
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* @return The new state for the port.
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*/
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enum port_state ptp_slave_fsm(enum port_state state, enum fsm_event event,
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int mdiff);
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#endif
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