EoE: TCP traffic possible; TX fragmenting to do.
/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006 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
* as published by the Free Software Foundation; version 2 of the License.
*
* 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
*
*****************************************************************************/
/**
\file
Ethernet-over-EtherCAT (EoE)
*/
/*****************************************************************************/
#include <linux/list.h>
#include <linux/netdevice.h>
#include "../include/ecrt.h"
#include "globals.h"
#include "slave.h"
#include "command.h"
/*****************************************************************************/
/**
State of an EoE object.
*/
typedef enum
{
EC_EOE_RX_START, /**< start receiving and check for data. */
EC_EOE_RX_CHECK, /**< checking frame was sent. */
EC_EOE_RX_FETCH, /**< there is new data; fetching frame was sent. */
EC_EOE_TX_START, /**< start sending a queued frame. */
EC_EOE_TX_SENT, /**< queued frame was sent; start checking. */
EC_EOE_TX_CHECK, /**< check mailbox for acknowledgement. */
EC_EOE_TX_FETCH, /**< receive mailbox response */
}
ec_eoe_state_t;
/*****************************************************************************/
/**
Ethernet-over-EtherCAT (EoE) Object.
The master creates one of these objects for each slave that supports the
EoE protocol.
*/
typedef struct
{
struct list_head list; /**< list item */
ec_slave_t *slave; /**< pointer to the corresponding slave */
ec_eoe_state_t state; /**< state of the state machine */
struct net_device *dev; /**< net_device for virtual ethernet device */
uint8_t opened; /**< net_device is opened */
struct sk_buff *skb; /**< current rx socket buffer */
off_t skb_offset; /**< current write pointer in the socket buffer */
size_t skb_size; /**< size of the allocated socket buffer memory */
uint8_t expected_fragment; /**< expected fragment */
struct net_device_stats stats; /**< device statistics */
struct list_head tx_queue; /**< queue for frames to send */
unsigned int tx_queue_active; /**< kernel netif queue started */
unsigned int queued_frames; /**< number of frames in the queue */
spinlock_t tx_queue_lock; /**< spinlock for the send queue */
uint8_t tx_frame_number; /**< Number of the transmitted frame */
size_t last_tx_bytes; /**< number of bytes currently transmitted */
}
ec_eoe_t;
/*****************************************************************************/
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_print(const ec_eoe_t *);
/*****************************************************************************/