fp@145: /******************************************************************************
fp@145:  *
fp@145:  *  $Id$
fp@145:  *
fp@1618:  *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
fp@1618:  *
fp@1618:  *  This file is part of the IgH EtherCAT Master.
fp@1618:  *
fp@1618:  *  The IgH EtherCAT Master is free software; you can redistribute it
fp@1618:  *  and/or modify it under the terms of the GNU General Public License
fp@1619:  *  as published by the Free Software Foundation; either version 2 of the
fp@1619:  *  License, or (at your option) any later version.
fp@1618:  *
fp@1618:  *  The IgH EtherCAT Master is distributed in the hope that it will be
fp@1618:  *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
fp@1618:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
fp@1618:  *  GNU General Public License for more details.
fp@1618:  *
fp@1618:  *  You should have received a copy of the GNU General Public License
fp@1618:  *  along with the IgH EtherCAT Master; if not, write to the Free Software
fp@1618:  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
fp@1618:  *
fp@1619:  *  The right to use EtherCAT Technology is granted and comes free of
fp@1619:  *  charge under condition of compatibility of product made by
fp@1619:  *  Licensee. People intending to distribute/sell products based on the
fp@1619:  *  code, have to sign an agreement to guarantee that products using
fp@1619:  *  software based on IgH EtherCAT master stay compatible with the actual
fp@1619:  *  EtherCAT specification (which are released themselves as an open
fp@1619:  *  standard) as the (only) precondition to have the right to use EtherCAT
fp@1619:  *  Technology, IP and trade marks.
fp@1619:  *
fp@145:  *****************************************************************************/
fp@145: 
fp@1618: /**
fp@1618:    \file
fp@1618:    Ethernet-over-EtherCAT (EoE)
fp@1618: */
fp@1618: 
fp@1618: /*****************************************************************************/
fp@1618: 
fp@145: #include <linux/list.h>
fp@1619: #include <linux/netdevice.h>
fp@145: 
fp@145: #include "../include/ecrt.h"
fp@145: #include "globals.h"
fp@145: #include "slave.h"
fp@145: #include "command.h"
fp@145: 
fp@145: /*****************************************************************************/
fp@145: 
fp@1618: /**
fp@1619:    Queued frame structure.
fp@1618: */
fp@1618: 
fp@1619: typedef struct
fp@145: {
fp@1619:     struct list_head queue; /**< list item */
fp@1619:     struct sk_buff *skb; /**< socket buffer */
fp@145: }
fp@1619: ec_eoe_frame_t;
fp@145: 
fp@145: /*****************************************************************************/
fp@145: 
fp@1619: typedef struct ec_eoe ec_eoe_t;
fp@1619: 
fp@1618: /**
fp@1619:    Ethernet-over-EtherCAT (EoE) handler.
fp@1618:    The master creates one of these objects for each slave that supports the
fp@1618:    EoE protocol.
fp@1618: */
fp@1618: 
fp@1619: struct ec_eoe
fp@145: {
fp@1618:     struct list_head list; /**< list item */
fp@1618:     ec_slave_t *slave; /**< pointer to the corresponding slave */
fp@1621:     ec_command_t command; /**< command */
fp@1619:     void (*state)(ec_eoe_t *); /**< state function for the state machine */
fp@1619:     struct net_device *dev; /**< net_device for virtual ethernet device */
fp@1619:     struct net_device_stats stats; /**< device statistics */
fp@1619:     unsigned int opened; /**< net_device is opened */
fp@1619:     struct sk_buff *rx_skb; /**< current rx socket buffer */
fp@1619:     off_t rx_skb_offset; /**< current write pointer in the socket buffer */
fp@1619:     size_t rx_skb_size; /**< size of the allocated socket buffer memory */
fp@1619:     uint8_t rx_expected_fragment; /**< next expected fragment number */
fp@1619:     struct list_head tx_queue; /**< queue for frames to send */
fp@1619:     unsigned int tx_queue_active; /**< kernel netif queue started */
fp@1619:     unsigned int tx_queued_frames; /**< number of frames in the queue */
fp@1619:     spinlock_t tx_queue_lock; /**< spinlock for the send queue */
fp@1619:     ec_eoe_frame_t *tx_frame; /**< current TX frame */
fp@1619:     uint8_t tx_frame_number; /**< number of the transmitted frame */
fp@1619:     uint8_t tx_fragment_number; /**< number of the fragment */
fp@1619:     size_t tx_offset; /**< number of octets sent */
fp@1619: };
fp@145: 
fp@145: /*****************************************************************************/
fp@145: 
fp@1619: int ec_eoe_init(ec_eoe_t *);
fp@145: void ec_eoe_clear(ec_eoe_t *);
fp@145: void ec_eoe_run(ec_eoe_t *);
fp@1619: unsigned int ec_eoe_active(const ec_eoe_t *);
fp@145: void ec_eoe_print(const ec_eoe_t *);
fp@145: 
fp@145: /*****************************************************************************/