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123 lines
4.4 KiB
C
123 lines
4.4 KiB
C
/*****************************************************************************
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*
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* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
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*
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* This file is part of the IgH EtherCAT Master.
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*
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* The IgH EtherCAT Master is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2, as
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* published by the Free Software Foundation.
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*
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* The IgH EtherCAT Master 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 GNU General
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* 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 the IgH EtherCAT Master; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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****************************************************************************/
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/**
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\file
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Ethernet over EtherCAT (EoE)
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*/
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/****************************************************************************/
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#ifndef __EC_ETHERNET_H__
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#define __EC_ETHERNET_H__
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include "globals.h"
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#include "slave.h"
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#include "datagram.h"
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/****************************************************************************/
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/** EoE frame types.
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*/
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enum {
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EC_EOE_FRAMETYPE_INIT_REQ = 0x00, /** Initiate EoE Request. */
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EC_EOE_FRAMETYPE_SET_IP_REQ = 0x02, /** Set IP Parameter Request. */
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EC_EOE_FRAMETYPE_SET_IP_RES = 0x03, /** Set IP Parameter Response. */
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EC_EOE_FRAMETYPE_FILT_REQ = 0x04, /** Set Address Filter Request. */
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EC_EOE_FRAMETYPE_FILT_RES = 0x05, /** Set Address Filter Response. */
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};
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/*****************************************************************************/
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/**
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Queued frame structure.
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*/
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typedef struct
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{
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struct list_head queue; /**< list item */
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struct sk_buff *skb; /**< socket buffer */
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}
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ec_eoe_frame_t;
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/****************************************************************************/
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typedef struct ec_eoe ec_eoe_t; /**< \see ec_eoe */
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/**
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Ethernet over EtherCAT (EoE) handler.
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The master creates one of these objects for each slave that supports the
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EoE protocol.
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*/
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struct ec_eoe
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{
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struct list_head list; /**< list item */
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ec_slave_t *slave; /**< pointer to the corresponding slave */
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ec_datagram_t datagram; /**< datagram */
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unsigned int queue_datagram; /**< the datagram is ready for queuing */
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void (*state)(ec_eoe_t *); /**< state function for the state machine */
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struct net_device *dev; /**< net_device for virtual ethernet device */
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struct net_device_stats stats; /**< device statistics */
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unsigned int opened; /**< net_device is opened */
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unsigned long rate_jiffies; /**< time of last rate output */
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struct sk_buff *rx_skb; /**< current rx socket buffer */
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off_t rx_skb_offset; /**< current write pointer in the socket buffer */
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size_t rx_skb_size; /**< size of the allocated socket buffer memory */
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uint8_t rx_expected_fragment; /**< next expected fragment number */
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uint32_t rx_counter; /**< octets received during last second */
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uint32_t rx_rate; /**< receive rate (bps) */
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unsigned int rx_idle; /**< Idle flag. */
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struct list_head tx_queue; /**< queue for frames to send */
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unsigned int tx_queue_size; /**< Transmit queue size. */
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unsigned int tx_queue_active; /**< kernel netif queue started */
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unsigned int tx_queued_frames; /**< number of frames in the queue */
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ec_eoe_frame_t *tx_frame; /**< current TX frame */
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uint8_t tx_frame_number; /**< number of the transmitted frame */
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uint8_t tx_fragment_number; /**< number of the fragment */
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size_t tx_offset; /**< number of octets sent */
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uint32_t tx_counter; /**< octets transmitted during last second */
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uint32_t tx_rate; /**< transmit rate (bps) */
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unsigned int tx_idle; /**< Idle flag. */
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unsigned int tries; /**< Tries. */
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};
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/****************************************************************************/
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int ec_eoe_init(ec_eoe_t *, ec_slave_t *);
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void ec_eoe_clear(ec_eoe_t *);
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void ec_eoe_run(ec_eoe_t *);
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void ec_eoe_queue(ec_eoe_t *);
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int ec_eoe_is_open(const ec_eoe_t *);
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int ec_eoe_is_idle(const ec_eoe_t *);
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/****************************************************************************/
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#endif
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/****************************************************************************/
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