94 lines
3.4 KiB
C
94 lines
3.4 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; version 2 of the License.
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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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*****************************************************************************/
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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 "command.h"
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/*****************************************************************************/
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/**
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State of an EoE object.
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*/
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typedef enum
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{
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EC_EOE_RX_START, /**< start receiving and check for data. */
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EC_EOE_RX_CHECK, /**< checking frame was sent. */
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EC_EOE_RX_FETCH, /**< there is new data; fetching frame was sent. */
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EC_EOE_TX_START, /**< start sending a queued frame. */
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EC_EOE_TX_SENT, /**< queued frame was sent; start checking. */
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EC_EOE_TX_CHECK, /**< check mailbox for acknowledgement. */
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EC_EOE_TX_FETCH, /**< receive mailbox response */
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}
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ec_eoe_state_t;
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/*****************************************************************************/
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/**
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Ethernet-over-EtherCAT (EoE) Object.
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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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typedef struct
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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_eoe_state_t state; /**< state of the state machine */
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struct net_device *dev; /**< net_device for virtual ethernet device */
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uint8_t opened; /**< net_device is opened */
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struct sk_buff *skb; /**< current rx socket buffer */
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off_t skb_offset; /**< current write pointer in the socket buffer */
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size_t skb_size; /**< size of the allocated socket buffer memory */
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uint8_t expected_fragment; /**< expected fragment */
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struct net_device_stats stats; /**< device statistics */
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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 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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uint8_t tx_frame_number; /**< Number of the transmitted frame */
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size_t last_tx_bytes; /**< number of bytes currently transmitted */
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}
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ec_eoe_t;
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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_print(const ec_eoe_t *);
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/*****************************************************************************/
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