master/ethernet.h
author Florian Pose <fp@igh-essen.com>
Wed, 15 Jul 2009 12:00:17 +0000
changeset 1505 da637f7e4e3a
parent 1489 f77a1182b6f4
child 1974 a5a44aa5915d
permissions -rw-r--r--
Added e100 for kernel 2.6.29, thanks to Andre Puschmann.
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/******************************************************************************
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 *
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 *  $Id$
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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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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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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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/**
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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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    struct semaphore tx_queue_sem; /**< Semaphore for the send 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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/*****************************************************************************/