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110 lines
4.2 KiB
C
110 lines
4.2 KiB
C
/******************************************************************************
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*
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* $Id$
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*
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* Copyright (C) 2006 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
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* and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* The IgH EtherCAT Master is distributed in the hope that it will be
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* useful, 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
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* along 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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* The right to use EtherCAT Technology is granted and comes free of
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* charge under condition of compatibility of product made by
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* Licensee. People intending to distribute/sell products based on the
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* code, have to sign an agreement to guarantee that products using
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* software based on IgH EtherCAT master stay compatible with the actual
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* EtherCAT specification (which are released themselves as an open
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* standard) as the (only) precondition to have the right to use EtherCAT
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* Technology, IP and trade marks.
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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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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include "../include/ecrt.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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struct list_head tx_queue; /**< queue for frames to send */
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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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spinlock_t tx_queue_lock; /**< spinlock 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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};
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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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/*****************************************************************************/
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