1

/******************************************************************************

     2

 *

     3

 *  $Id$

     4

 *

     5

 *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH

     6

 *

     7

 *  This file is part of the IgH EtherCAT Master.

     8

 *

     9

 *  The IgH EtherCAT Master is free software; you can redistribute it

    10

 *  and/or modify it under the terms of the GNU General Public License

    11

 *  as published by the Free Software Foundation; version 2 of the License.

    12

 *

    13

 *  The IgH EtherCAT Master is distributed in the hope that it will be

    14

 *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of

    15

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    16

 *  GNU General Public License for more details.

    17

 *

    18

 *  You should have received a copy of the GNU General Public License

    19

 *  along with the IgH EtherCAT Master; if not, write to the Free Software

    20

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    21

 *

    22

 *****************************************************************************/

    23

    24

/**

    25

   \file

    26

   Ethernet-over-EtherCAT (EoE)

    27

*/

    28

    29

/*****************************************************************************/

    30

    31

#include <linux/list.h>

    32

#include <linux/netdevice.h>

    33

    34

#include "../include/ecrt.h"

    35

#include "globals.h"

    36

#include "slave.h"

    37

#include "command.h"

    38

    39

/*****************************************************************************/

    40

    41

/**

    42

   Queued frame structure.

    43

*/

    44

    45

typedef struct

    46

{

    47

    struct list_head queue; /**< list item */

    48

    struct sk_buff *skb; /**< socket buffer */

    49

}

    50

ec_eoe_frame_t;

    51

    52

/*****************************************************************************/

    53

    54

typedef struct ec_eoe ec_eoe_t;

    55

    56

/**

    57

   Ethernet-over-EtherCAT (EoE) Object.

    58

   The master creates one of these objects for each slave that supports the

    59

   EoE protocol.

    60

*/

    61

    62

struct ec_eoe

    63

{

    64

    struct list_head list; /**< list item */

    65

    ec_slave_t *slave; /**< pointer to the corresponding slave */

    66

    void (*state)(ec_eoe_t *); /**< state function for the state machine */

    67

    struct net_device *dev; /**< net_device for virtual ethernet device */

    68

    struct net_device_stats stats; /**< device statistics */

    69

    unsigned int opened; /**< net_device is opened */

    70

    struct sk_buff *rx_skb; /**< current rx socket buffer */

    71

    off_t rx_skb_offset; /**< current write pointer in the socket buffer */

    72

    size_t rx_skb_size; /**< size of the allocated socket buffer memory */

    73

    uint8_t rx_expected_fragment; /**< next expected fragment number */

    74

    struct list_head tx_queue; /**< queue for frames to send */

    75

    unsigned int tx_queue_active; /**< kernel netif queue started */

    76

    unsigned int tx_queued_frames; /**< number of frames in the queue */

    77

    spinlock_t tx_queue_lock; /**< spinlock for the send queue */

    78

    ec_eoe_frame_t *tx_frame; /**< current TX frame */

    79

    uint8_t tx_frame_number; /**< number of the transmitted frame */

    80

    uint8_t tx_fragment_number; /**< number of the fragment */

    81

    size_t tx_offset; /**< number of octets sent */

    82

};

    83

    84

/*****************************************************************************/

    85

    86

int ec_eoe_init(ec_eoe_t *, ec_slave_t *);

    87

void ec_eoe_clear(ec_eoe_t *);

    88

void ec_eoe_run(ec_eoe_t *);

    89

unsigned int ec_eoe_active(const ec_eoe_t *);

    90

void ec_eoe_print(const ec_eoe_t *);

    91

    92

/*****************************************************************************/