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/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT Master.
*
* The IgH EtherCAT Master is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* The IgH EtherCAT Master is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with the IgH EtherCAT Master; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* ---
*
* The license mentioned above concerns the source code only. Using the
* EtherCAT technology and brand is only permitted in compliance with the
* industrial property and similar rights of Beckhoff Automation GmbH.
*
*****************************************************************************/
/**
\file
Ethernet over EtherCAT (EoE)
*/
/*****************************************************************************/
#ifndef __EC_ETHERNET_H__
#define __EC_ETHERNET_H__
#include <linux/list.h>
#include <linux/netdevice.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
#include <linux/semaphore.h>
#else
#include <asm/semaphore.h>
#endif
#include "globals.h"
#include "slave.h"
#include "datagram.h"
/*****************************************************************************/
/**
Queued frame structure.
*/
typedef struct
{
struct list_head queue; /**< list item */
struct sk_buff *skb; /**< socket buffer */
}
ec_eoe_frame_t;
/*****************************************************************************/
typedef struct ec_eoe ec_eoe_t; /**< \see ec_eoe */
/**
Ethernet over EtherCAT (EoE) handler.
The master creates one of these objects for each slave that supports the
EoE protocol.
*/
struct ec_eoe
{
struct list_head list; /**< list item */
ec_slave_t *slave; /**< pointer to the corresponding slave */
ec_datagram_t datagram; /**< datagram */
unsigned int queue_datagram; /**< the datagram is ready for queuing */
void (*state)(ec_eoe_t *); /**< state function for the state machine */
struct net_device *dev; /**< net_device for virtual ethernet device */
struct net_device_stats stats; /**< device statistics */
unsigned int opened; /**< net_device is opened */
unsigned long rate_jiffies; /**< time of last rate output */
struct sk_buff *rx_skb; /**< current rx socket buffer */
off_t rx_skb_offset; /**< current write pointer in the socket buffer */
size_t rx_skb_size; /**< size of the allocated socket buffer memory */
uint8_t rx_expected_fragment; /**< next expected fragment number */
uint32_t rx_counter; /**< octets received during last second */
uint32_t rx_rate; /**< receive rate (bps) */
unsigned int rx_idle; /**< Idle flag. */
struct list_head tx_queue; /**< queue for frames to send */
unsigned int tx_queue_size; /**< Transmit queue size. */
unsigned int tx_queue_active; /**< kernel netif queue started */
unsigned int tx_queued_frames; /**< number of frames in the queue */
struct semaphore tx_queue_sem; /**< Semaphore for the send queue. */
ec_eoe_frame_t *tx_frame; /**< current TX frame */
uint8_t tx_frame_number; /**< number of the transmitted frame */
uint8_t tx_fragment_number; /**< number of the fragment */
size_t tx_offset; /**< number of octets sent */
uint32_t tx_counter; /**< octets transmitted during last second */
uint32_t tx_rate; /**< transmit rate (bps) */
unsigned int tx_idle; /**< Idle flag. */
unsigned int tries; /**< Tries. */
};
/*****************************************************************************/
int ec_eoe_init(ec_eoe_t *, ec_slave_t *);
void ec_eoe_clear(ec_eoe_t *);
void ec_eoe_run(ec_eoe_t *);
void ec_eoe_queue(ec_eoe_t *);
int ec_eoe_is_open(const ec_eoe_t *);
int ec_eoe_is_idle(const ec_eoe_t *);
/*****************************************************************************/
#endif
/*****************************************************************************/
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