master/ethernet.c
author Florian Pose <fp@igh-essen.com>
Wed, 05 Nov 2008 13:20:21 +0000
branchstable-1.4
changeset 1668 9a4a5e9aa40c
parent 986 a486591ba86b
child 1209 8be462afb7f4
child 1685 399ef727bf62
permissions -rw-r--r--
udev rule for writing access.
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/******************************************************************************
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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; either version 2 of the
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 *  License, or (at your option) any later version.
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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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 *  The right to use EtherCAT Technology is granted and comes free of
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 *  charge under condition of compatibility of product made by
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 *  Licensee. People intending to distribute/sell products based on the
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 *  code, have to sign an agreement to guarantee that products using
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 *  software based on IgH EtherCAT master stay compatible with the actual
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 *  EtherCAT specification (which are released themselves as an open
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 *  standard) as the (only) precondition to have the right to use EtherCAT
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 *  Technology, IP and trade marks.
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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/netdevice.h>
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#include <linux/etherdevice.h>
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#include "../include/ecrt.h"
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#include "globals.h"
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#include "master.h"
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#include "slave.h"
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#include "mailbox.h"
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#include "ethernet.h"
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/*****************************************************************************/
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/**
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 * Defines the debug level of EoE processing.
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 *
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 * 0 = No debug messages.
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 * 1 = Output actions.
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 * 2 = Output actions and frame data.
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 */
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#define EOE_DEBUG_LEVEL 0
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/** size of the EoE tx queue */
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#define EC_EOE_TX_QUEUE_SIZE 100
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/*****************************************************************************/
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void ec_eoe_flush(ec_eoe_t *);
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// state functions
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void ec_eoe_state_rx_start(ec_eoe_t *);
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void ec_eoe_state_rx_check(ec_eoe_t *);
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void ec_eoe_state_rx_fetch(ec_eoe_t *);
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void ec_eoe_state_tx_start(ec_eoe_t *);
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void ec_eoe_state_tx_sent(ec_eoe_t *);
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// net_device functions
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int ec_eoedev_open(struct net_device *);
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int ec_eoedev_stop(struct net_device *);
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int ec_eoedev_tx(struct sk_buff *, struct net_device *);
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struct net_device_stats *ec_eoedev_stats(struct net_device *);
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/*****************************************************************************/
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/**
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 * EoE constructor.
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 * Initializes the EoE handler, creates a net_device and registers it.
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 */
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int ec_eoe_init(
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        ec_eoe_t *eoe, /**< EoE handler */
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        ec_slave_t *slave /**< EtherCAT slave */
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        )
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{
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    ec_eoe_t **priv;
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    int result, i;
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    char name[EC_DATAGRAM_NAME_SIZE];
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    eoe->slave = slave;
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    ec_datagram_init(&eoe->datagram);
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    eoe->queue_datagram = 0;
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    eoe->state = ec_eoe_state_rx_start;
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    eoe->opened = 0;
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    eoe->rx_skb = NULL;
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    eoe->rx_expected_fragment = 0;
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    INIT_LIST_HEAD(&eoe->tx_queue);
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    eoe->tx_frame = NULL;
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    eoe->tx_queue_active = 0;
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    eoe->tx_queued_frames = 0;
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    eoe->tx_queue_lock = SPIN_LOCK_UNLOCKED;
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    eoe->tx_frame_number = 0xFF;
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    memset(&eoe->stats, 0, sizeof(struct net_device_stats));
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    eoe->rx_counter = 0;
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    eoe->tx_counter = 0;
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    eoe->rx_rate = 0;
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    eoe->tx_rate = 0;
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    eoe->rate_jiffies = 0;
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    /* device name eoe<MASTER>[as]<SLAVE>, because networking scripts don't
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     * like hyphens etc. in interface names. */
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    if (slave->sii.alias) {
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        snprintf(name, EC_DATAGRAM_NAME_SIZE,
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                "eoe%ua%u", slave->master->index, slave->sii.alias);
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    } else {
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        snprintf(name, EC_DATAGRAM_NAME_SIZE,
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                "eoe%us%u", slave->master->index, slave->ring_position);
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    }
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parents: 712
diff changeset
   130
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   131
    snprintf(eoe->datagram.name, EC_DATAGRAM_NAME_SIZE, name);
661
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   132
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   133
    if (!(eoe->dev = alloc_netdev(sizeof(ec_eoe_t *), name, ether_setup))) {
712
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   134
        EC_ERR("Unable to allocate net_device %s for EoE handler!\n", name);
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   135
        goto out_return;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   136
    }
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   137
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   138
    // initialize net_device
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parents: 217
diff changeset
   139
    eoe->dev->open = ec_eoedev_open;
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   140
    eoe->dev->stop = ec_eoedev_stop;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   141
    eoe->dev->hard_start_xmit = ec_eoedev_tx;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   142
    eoe->dev->get_stats = ec_eoedev_stats;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   143
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   144
    for (i = 0; i < ETH_ALEN; i++)
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   145
        eoe->dev->dev_addr[i] = i | (i << 4);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   146
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   147
    // initialize private data
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   148
    priv = netdev_priv(eoe->dev);
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   149
    *priv = eoe;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   150
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   151
    // Usually setting the MTU appropriately makes the upper layers
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parents: 217
diff changeset
   152
    // do the frame fragmenting. In some cases this doesn't work
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   153
    // so the MTU is left on the Ethernet standard value and fragmenting
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   154
    // is done "manually".
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   155
#if 0
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   156
    eoe->dev->mtu = slave->sii.rx_mailbox_size - ETH_HLEN - 10;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   157
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   158
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   159
    // connect the net_device to the kernel
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   160
    if ((result = register_netdev(eoe->dev))) {
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   161
        EC_ERR("Unable to register net_device: error %i\n", result);
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   162
        goto out_free;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   163
    }
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   164
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   165
    // make the last address octet unique
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   166
    eoe->dev->dev_addr[ETH_ALEN - 1] = (uint8_t) eoe->dev->ifindex;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   167
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   168
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   169
 out_free:
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   170
    free_netdev(eoe->dev);
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   171
    eoe->dev = NULL;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   172
 out_return:
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   173
    return -1;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   174
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   175
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   176
/*****************************************************************************/
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Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   177
197
b9a6e2c22745 GPLv2 License and enhanced Doxygen output.
Florian Pose <fp@igh-essen.com>
parents: 195
diff changeset
   178
/**
199
04ecf40fc2e9 Doxygen added interface modules and file documentation.
Florian Pose <fp@igh-essen.com>
parents: 197
diff changeset
   179
   EoE destructor.
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   180
   Unregisteres the net_device and frees allocated memory.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   181
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   182
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   183
void ec_eoe_clear(ec_eoe_t *eoe /**< EoE handler */)
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   184
{
552
029546740810 Minor: Removed warning when EoE interface is up upon master unloading.
Florian Pose <fp@igh-essen.com>
parents: 460
diff changeset
   185
    unregister_netdev(eoe->dev); // possibly calls close callback
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   186
    free_netdev(eoe->dev);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   187
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   188
    // empty transmit queue
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   189
    ec_eoe_flush(eoe);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   190
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   191
    if (eoe->tx_frame) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   192
        dev_kfree_skb(eoe->tx_frame->skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   193
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   194
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   195
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   196
    if (eoe->rx_skb) dev_kfree_skb(eoe->rx_skb);
279
12f48c1cb143 Removed mbox_command out of slave.
Florian Pose <fp@igh-essen.com>
parents: 261
diff changeset
   197
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   198
    ec_datagram_clear(&eoe->datagram);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   199
}
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   200
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   201
/*****************************************************************************/
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   202
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   203
/**
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   204
   Empties the transmit queue.
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   205
*/
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   206
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   207
void ec_eoe_flush(ec_eoe_t *eoe /**< EoE handler */)
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   208
{
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   209
    ec_eoe_frame_t *frame, *next;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   210
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   211
    spin_lock_bh(&eoe->tx_queue_lock);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   212
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   213
    list_for_each_entry_safe(frame, next, &eoe->tx_queue, queue) {
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   214
        list_del(&frame->queue);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   215
        dev_kfree_skb(frame->skb);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   216
        kfree(frame);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   217
    }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   218
    eoe->tx_queued_frames = 0;
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   219
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   220
    spin_unlock_bh(&eoe->tx_queue_lock);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   221
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   222
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   223
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   224
197
b9a6e2c22745 GPLv2 License and enhanced Doxygen output.
Florian Pose <fp@igh-essen.com>
parents: 195
diff changeset
   225
/**
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   226
   Sends a frame or the next fragment.
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   227
*/
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   228
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   229
int ec_eoe_send(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   230
{
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   231
    size_t remaining_size, current_size, complete_offset;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   232
    unsigned int last_fragment;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   233
    uint8_t *data;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   234
#if EOE_DEBUG_LEVEL > 1
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   235
    unsigned int i;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   236
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   237
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   238
    remaining_size = eoe->tx_frame->skb->len - eoe->tx_offset;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   239
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   240
    if (remaining_size <= eoe->slave->sii.tx_mailbox_size - 10) {
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   241
        current_size = remaining_size;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   242
        last_fragment = 1;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   243
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   244
    else {
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   245
        current_size = ((eoe->slave->sii.tx_mailbox_size - 10) / 32) * 32;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   246
        last_fragment = 0;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   247
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   248
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   249
    if (eoe->tx_fragment_number) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   250
        complete_offset = eoe->tx_offset / 32;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   251
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   252
    else {
319
88f2e8c4face Minor changes.
Florian Pose <fp@igh-essen.com>
parents: 314
diff changeset
   253
        // complete size in 32 bit blocks, rounded up.
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   254
        complete_offset = remaining_size / 32 + 1;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   255
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   256
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   257
#if EOE_DEBUG_LEVEL > 0
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   258
    EC_INFO("EoE %s TX sending fragment %u%s with %u octets (%u)."
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   259
           " %u frames queued.\n", eoe->dev->name, eoe->tx_fragment_number,
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   260
           last_fragment ? "" : "+", current_size, complete_offset,
218
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diff changeset
   261
           eoe->tx_queued_frames);
217
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#endif
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   264
#if EOE_DEBUG_LEVEL > 1
770
efa5af306318 Improved EoE debugging.
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    EC_INFO("");
217
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   266
    for (i = 0; i < current_size; i++) {
340
5a5f5a14c847 Fixed EoE debugging.
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   267
        printk("%02X ", eoe->tx_frame->skb->data[eoe->tx_offset + i]);
217
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diff changeset
   268
        if ((i + 1) % 16 == 0) {
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diff changeset
   269
            printk("\n");
770
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            EC_INFO("");
217
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   271
        }
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   272
    }
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    printk("\n");
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   274
#endif
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   275
293
14aeb79aa992 Renamed command structure to datagram.
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    if (!(data = ec_slave_mbox_prepare_send(eoe->slave, &eoe->datagram,
279
12f48c1cb143 Removed mbox_command out of slave.
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   277
                                            0x02, current_size + 4)))
217
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   278
        return -1;
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   279
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    EC_WRITE_U8 (data,     0x00); // eoe fragment req.
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   281
    EC_WRITE_U8 (data + 1, last_fragment);
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   282
    EC_WRITE_U16(data + 2, ((eoe->tx_fragment_number & 0x3F) |
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diff changeset
   283
                            (complete_offset & 0x3F) << 6 |
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   284
                            (eoe->tx_frame_number & 0x0F) << 12));
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diff changeset
   285
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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   286
    memcpy(data + 4, eoe->tx_frame->skb->data + eoe->tx_offset, current_size);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   287
    eoe->queue_datagram = 1;
217
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   288
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    eoe->tx_offset += current_size;
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diff changeset
   290
    eoe->tx_fragment_number++;
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diff changeset
   291
    return 0;
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   292
}
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   293
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   294
/*****************************************************************************/
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   295
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   296
/**
199
04ecf40fc2e9 Doxygen added interface modules and file documentation.
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   297
   Runs the EoE state machine.
197
b9a6e2c22745 GPLv2 License and enhanced Doxygen output.
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   298
*/
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   299
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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   300
void ec_eoe_run(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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   301
{
210
1cc6bcb1e6ae EoE frame receiving; regarding open/stop commands.
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   302
    if (!eoe->opened) return;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
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   303
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   304
    // if the datagram was not sent, or is not yet received, skip this cycle
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    if (eoe->queue_datagram || eoe->datagram.state == EC_DATAGRAM_SENT)
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   306
        return;
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   307
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   308
    // call state function
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diff changeset
   309
    eoe->state(eoe);
336
360e5287c888 EoE rate statistics.
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   310
360e5287c888 EoE rate statistics.
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diff changeset
   311
    // update statistics
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
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diff changeset
   312
    if (jiffies - eoe->rate_jiffies > HZ) {
336
360e5287c888 EoE rate statistics.
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diff changeset
   313
        eoe->rx_rate = eoe->rx_counter * 8;
360e5287c888 EoE rate statistics.
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diff changeset
   314
        eoe->tx_rate = eoe->tx_counter * 8;
360e5287c888 EoE rate statistics.
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diff changeset
   315
        eoe->rx_counter = 0;
360e5287c888 EoE rate statistics.
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diff changeset
   316
        eoe->tx_counter = 0;
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
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diff changeset
   317
        eoe->rate_jiffies = jiffies;
336
360e5287c888 EoE rate statistics.
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diff changeset
   318
    }
721
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   319
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
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diff changeset
   320
    ec_datagram_output_stats(&eoe->datagram);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
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diff changeset
   321
}
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   322
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   323
/*****************************************************************************/
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diff changeset
   324
197
b9a6e2c22745 GPLv2 License and enhanced Doxygen output.
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diff changeset
   325
/**
721
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   326
 * Queues the datagram, if necessary.
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   327
 */
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   328
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   329
void ec_eoe_queue(ec_eoe_t *eoe /**< EoE handler */)
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   330
{
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   331
   if (eoe->queue_datagram) {
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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diff changeset
   332
       ec_master_queue_datagram(eoe->slave->master, &eoe->datagram);
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   333
       eoe->queue_datagram = 0;
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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diff changeset
   334
   }
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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diff changeset
   335
}
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   336
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   337
/*****************************************************************************/
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   338
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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   339
/**
235
f973808540a6 No master locking, if no EoE devices are "up".
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diff changeset
   340
   Returns the state of the device.
f973808540a6 No master locking, if no EoE devices are "up".
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diff changeset
   341
   \return 1 if the device is "up", 0 if it is "down"
f973808540a6 No master locking, if no EoE devices are "up".
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diff changeset
   342
*/
f973808540a6 No master locking, if no EoE devices are "up".
Florian Pose <fp@igh-essen.com>
parents: 219
diff changeset
   343
661
bc1de1362efb Dynamic creation of EoE handlers.
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parents: 629
diff changeset
   344
int ec_eoe_is_open(const ec_eoe_t *eoe /**< EoE handler */)
bc1de1362efb Dynamic creation of EoE handlers.
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diff changeset
   345
{
bc1de1362efb Dynamic creation of EoE handlers.
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diff changeset
   346
    return eoe->opened;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   347
}
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   348
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   349
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   350
 *  STATE PROCESSING FUNCTIONS
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diff changeset
   351
 *****************************************************************************/
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diff changeset
   352
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   353
/**
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diff changeset
   354
   State: RX_START.
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   355
   Starts a new receiving sequence by queueing a datagram that checks the
14aeb79aa992 Renamed command structure to datagram.
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parents: 291
diff changeset
   356
   slave's mailbox for a new EoE datagram.
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   357
*/
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diff changeset
   358
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   359
void ec_eoe_state_rx_start(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   360
{
906
f95e3e33c0cf Removed slave online flag.
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parents: 834
diff changeset
   361
    if (eoe->slave->error_flag || !eoe->slave->master->main_device.link_state)
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   362
        return;
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   363
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   364
    ec_slave_mbox_prepare_check(eoe->slave, &eoe->datagram);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   365
    eoe->queue_datagram = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   366
    eoe->state = ec_eoe_state_rx_check;
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   367
}
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   368
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diff changeset
   369
/*****************************************************************************/
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diff changeset
   370
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diff changeset
   371
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   372
   State: RX_CHECK.
293
14aeb79aa992 Renamed command structure to datagram.
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diff changeset
   373
   Processes the checking datagram sent in RX_START and issues a receive
14aeb79aa992 Renamed command structure to datagram.
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diff changeset
   374
   datagram, if new data is available.
218
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diff changeset
   375
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   376
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   377
void ec_eoe_state_rx_check(ec_eoe_t *eoe /**< EoE handler */)
218
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diff changeset
   378
{
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   379
    if (eoe->datagram.state != EC_DATAGRAM_RECEIVED) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   380
        eoe->stats.rx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   381
        eoe->state = ec_eoe_state_tx_start;
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diff changeset
   382
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   383
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   384
293
14aeb79aa992 Renamed command structure to datagram.
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parents: 291
diff changeset
   385
    if (!ec_slave_mbox_check(&eoe->datagram)) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   386
        eoe->state = ec_eoe_state_tx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   387
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   388
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   389
293
14aeb79aa992 Renamed command structure to datagram.
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parents: 291
diff changeset
   390
    ec_slave_mbox_prepare_fetch(eoe->slave, &eoe->datagram);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   391
    eoe->queue_datagram = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   392
    eoe->state = ec_eoe_state_rx_fetch;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   393
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   394
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   395
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   396
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   397
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   398
   State: RX_FETCH.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   399
   Checks if the requested data of RX_CHECK was received and processes the
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   400
   EoE datagram.
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   401
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   402
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   403
void ec_eoe_state_rx_fetch(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   404
{
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   405
    size_t rec_size, data_size;
391
7d67195702dd Removed additional loop in coe_down FSM; renamed mbox_type to mbox_prot.
Florian Pose <fp@igh-essen.com>
parents: 390
diff changeset
   406
    uint8_t *data, frame_type, last_fragment, time_appended, mbox_prot;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   407
    uint8_t frame_number, fragment_offset, fragment_number;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   408
    off_t offset;
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   409
#if EOE_DEBUG_LEVEL > 1
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   410
    unsigned int i;
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   411
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   412
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   413
    if (eoe->datagram.state != EC_DATAGRAM_RECEIVED) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   414
        eoe->stats.rx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   415
        eoe->state = ec_eoe_state_tx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   416
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   417
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   418
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   419
    if (!(data = ec_slave_mbox_fetch(eoe->slave, &eoe->datagram,
391
7d67195702dd Removed additional loop in coe_down FSM; renamed mbox_type to mbox_prot.
Florian Pose <fp@igh-essen.com>
parents: 390
diff changeset
   420
                                     &mbox_prot, &rec_size))) {
390
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   421
        eoe->stats.rx_errors++;
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   422
        eoe->state = ec_eoe_state_tx_start;
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   423
        return;
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   424
    }
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   425
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   426
    if (mbox_prot != 0x02) { // EoE FIXME mailbox handler necessary
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   427
        eoe->stats.rx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   428
        eoe->state = ec_eoe_state_tx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   429
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   430
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   431
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   432
    frame_type = EC_READ_U16(data) & 0x000F;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   433
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   434
    if (frame_type != 0x00) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   435
#if EOE_DEBUG_LEVEL > 0
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   436
        EC_INFO("EoE %s: Other frame received.\n", eoe->dev->name);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   437
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   438
        eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   439
        eoe->state = ec_eoe_state_tx_start;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   440
        return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   441
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   442
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   443
    // EoE Fragment Request received
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   444
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   445
    last_fragment = (EC_READ_U16(data) >> 8) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   446
    time_appended = (EC_READ_U16(data) >> 9) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   447
    fragment_number = EC_READ_U16(data + 2) & 0x003F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   448
    fragment_offset = (EC_READ_U16(data + 2) >> 6) & 0x003F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   449
    frame_number = (EC_READ_U16(data + 2) >> 12) & 0x000F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   450
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   451
#if EOE_DEBUG_LEVEL > 0
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   452
    EC_INFO("EoE %s RX fragment %u%s, offset %u, frame %u%s,"
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   453
           " %u octets\n", eoe->dev->name, fragment_number,
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   454
           last_fragment ? "" : "+", fragment_offset, frame_number, 
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   455
           time_appended ? ", + timestamp" : "",
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   456
           time_appended ? rec_size - 8 : rec_size - 4);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   457
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   458
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   459
#if EOE_DEBUG_LEVEL > 1
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   460
    EC_INFO("");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   461
    for (i = 0; i < rec_size - 4; i++) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   462
        printk("%02X ", data[i + 4]);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   463
        if ((i + 1) % 16 == 0) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   464
            printk("\n");
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   465
            EC_INFO("");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   466
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   467
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   468
    printk("\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   469
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   470
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   471
    data_size = time_appended ? rec_size - 8 : rec_size - 4;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   472
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   473
    if (!fragment_number) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   474
        if (eoe->rx_skb) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   475
            EC_WARN("EoE RX freeing old socket buffer...\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   476
            dev_kfree_skb(eoe->rx_skb);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   477
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   478
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   479
        // new socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   480
        if (!(eoe->rx_skb = dev_alloc_skb(fragment_offset * 32))) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   481
            if (printk_ratelimit())
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   482
                EC_WARN("EoE RX low on mem. frame dropped.\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   483
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   484
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   485
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   486
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   487
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   488
        eoe->rx_skb_offset = 0;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   489
        eoe->rx_skb_size = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   490
        eoe->rx_expected_fragment = 0;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   491
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   492
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   493
        if (!eoe->rx_skb) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   494
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   495
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   496
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   497
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   498
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   499
        offset = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   500
        if (offset != eoe->rx_skb_offset ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   501
            offset + data_size > eoe->rx_skb_size ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   502
            fragment_number != eoe->rx_expected_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   503
            dev_kfree_skb(eoe->rx_skb);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   504
            eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   505
            eoe->stats.rx_errors++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   506
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   507
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   508
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   509
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   510
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   511
    // copy fragment into socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   512
    memcpy(skb_put(eoe->rx_skb, data_size), data + 4, data_size);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   513
    eoe->rx_skb_offset += data_size;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   514
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   515
    if (last_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   516
        // update statistics
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   517
        eoe->stats.rx_packets++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   518
        eoe->stats.rx_bytes += eoe->rx_skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   519
        eoe->rx_counter += eoe->rx_skb->len;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   520
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   521
#if EOE_DEBUG_LEVEL > 0
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   522
        EC_INFO("EoE %s RX frame completed with %u octets.\n",
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   523
               eoe->dev->name, eoe->rx_skb->len);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   524
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   525
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   526
        // pass socket buffer to network stack
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   527
        eoe->rx_skb->dev = eoe->dev;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   528
        eoe->rx_skb->protocol = eth_type_trans(eoe->rx_skb, eoe->dev);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   529
        eoe->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   530
        if (netif_rx(eoe->rx_skb)) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   531
            EC_WARN("EoE RX netif_rx failed.\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   532
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   533
        eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   534
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   535
        eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   536
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   537
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   538
        eoe->rx_expected_fragment++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   539
#if EOE_DEBUG_LEVEL > 0
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   540
        EC_INFO("EoE %s RX expecting fragment %u\n",
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   541
               eoe->dev->name, eoe->rx_expected_fragment);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   542
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   543
        eoe->state = ec_eoe_state_rx_start;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   544
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   545
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   546
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   547
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   548
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   549
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   550
   State: TX START.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   551
   Starts a new transmit sequence. If no data is available, a new receive
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   552
   sequence is started instead.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   553
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   554
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   555
void ec_eoe_state_tx_start(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   556
{
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   557
#if EOE_DEBUG_LEVEL > 0
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   558
    unsigned int wakeup = 0;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   559
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   560
906
f95e3e33c0cf Removed slave online flag.
Florian Pose <fp@igh-essen.com>
parents: 834
diff changeset
   561
    if (eoe->slave->error_flag || !eoe->slave->master->main_device.link_state)
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   562
        return;
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   563
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   564
    spin_lock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   565
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   566
    if (!eoe->tx_queued_frames || list_empty(&eoe->tx_queue)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   567
        spin_unlock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   568
        // no data available.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   569
        // start a new receive immediately.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   570
        ec_eoe_state_rx_start(eoe);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   571
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   572
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   573
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   574
    // take the first frame out of the queue
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   575
    eoe->tx_frame = list_entry(eoe->tx_queue.next, ec_eoe_frame_t, queue);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   576
    list_del(&eoe->tx_frame->queue);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   577
    if (!eoe->tx_queue_active &&
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   578
        eoe->tx_queued_frames == EC_EOE_TX_QUEUE_SIZE / 2) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   579
        netif_wake_queue(eoe->dev);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   580
        eoe->tx_queue_active = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   581
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   582
        wakeup = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   583
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   584
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   585
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   586
    eoe->tx_queued_frames--;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   587
    spin_unlock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   588
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   589
    eoe->tx_frame_number++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   590
    eoe->tx_frame_number %= 16;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   591
    eoe->tx_fragment_number = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   592
    eoe->tx_offset = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   593
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   594
    if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   595
        dev_kfree_skb(eoe->tx_frame->skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   596
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   597
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   598
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   599
        eoe->state = ec_eoe_state_rx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   600
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   601
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   602
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   603
#if EOE_DEBUG_LEVEL > 0
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   604
    if (wakeup) EC_INFO("EoE %s waking up TX queue...\n", eoe->dev->name);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   605
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   606
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   607
    eoe->state = ec_eoe_state_tx_sent;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   608
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   609
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   610
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   611
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   612
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   613
   State: TX SENT.
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   614
   Checks is the previous transmit datagram succeded and sends the next
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   615
   fragment, if necessary.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   616
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   617
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   618
void ec_eoe_state_tx_sent(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   619
{
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   620
    if (eoe->datagram.state != EC_DATAGRAM_RECEIVED) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   621
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   622
        eoe->state = ec_eoe_state_rx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   623
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   624
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   625
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   626
    if (eoe->datagram.working_counter != 1) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   627
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   628
        eoe->state = ec_eoe_state_rx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   629
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   630
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   631
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   632
    // frame completely sent
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   633
    if (eoe->tx_offset >= eoe->tx_frame->skb->len) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   634
        eoe->stats.tx_packets++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   635
        eoe->stats.tx_bytes += eoe->tx_frame->skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   636
        eoe->tx_counter += eoe->tx_frame->skb->len;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   637
        dev_kfree_skb(eoe->tx_frame->skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   638
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   639
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   640
        eoe->state = ec_eoe_state_rx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   641
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   642
    else { // send next fragment
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   643
        if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   644
            dev_kfree_skb(eoe->tx_frame->skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   645
            kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   646
            eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   647
            eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   648
            eoe->state = ec_eoe_state_rx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   649
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   650
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   651
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   652
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   653
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   654
 *  NET_DEVICE functions
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   655
 *****************************************************************************/
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   656
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   657
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   658
   Opens the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   659
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   660
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   661
int ec_eoedev_open(struct net_device *dev /**< EoE net_device */)
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   662
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   663
    ec_eoe_t *eoe = *((ec_eoe_t **) netdev_priv(dev));
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   664
    ec_eoe_flush(eoe);
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   665
    eoe->opened = 1;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   666
    netif_start_queue(dev);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   667
    eoe->tx_queue_active = 1;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   668
    EC_INFO("%s opened.\n", dev->name);
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   669
    ec_slave_request_state(eoe->slave, EC_SLAVE_STATE_OP);
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   670
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   671
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   672
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   673
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   674
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   675
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   676
   Stops the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   677
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   678
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   679
int ec_eoedev_stop(struct net_device *dev /**< EoE net_device */)
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   680
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   681
    ec_eoe_t *eoe = *((ec_eoe_t **) netdev_priv(dev));
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   682
    netif_stop_queue(dev);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   683
    eoe->tx_queue_active = 0;
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   684
    eoe->opened = 0;
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   685
    ec_eoe_flush(eoe);
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   686
    EC_INFO("%s stopped.\n", dev->name);
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   687
    ec_slave_request_state(eoe->slave, EC_SLAVE_STATE_PREOP);
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   688
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   689
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   690
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   691
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   692
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   693
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   694
   Transmits data via the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   695
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   696
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   697
int ec_eoedev_tx(struct sk_buff *skb, /**< transmit socket buffer */
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   698
                 struct net_device *dev /**< EoE net_device */
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   699
                )
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   700
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   701
    ec_eoe_t *eoe = *((ec_eoe_t **) netdev_priv(dev));
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   702
    ec_eoe_frame_t *frame;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   703
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   704
#if 0
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   705
    if (skb->len > eoe->slave->sii.tx_mailbox_size - 10) {
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   706
        EC_WARN("EoE TX frame (%u octets) exceeds MTU. dropping.\n", skb->len);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   707
        dev_kfree_skb(skb);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   708
        eoe->stats.tx_dropped++;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   709
        return 0;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   710
    }
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   711
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   712
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   713
    if (!(frame =
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   714
          (ec_eoe_frame_t *) kmalloc(sizeof(ec_eoe_frame_t), GFP_ATOMIC))) {
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   715
        if (printk_ratelimit())
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   716
            EC_WARN("EoE TX: low on mem. frame dropped.\n");
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   717
        return 1;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   718
    }
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   719
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   720
    frame->skb = skb;
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   721
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   722
    spin_lock_bh(&eoe->tx_queue_lock);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   723
    list_add_tail(&frame->queue, &eoe->tx_queue);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   724
    eoe->tx_queued_frames++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   725
    if (eoe->tx_queued_frames == EC_EOE_TX_QUEUE_SIZE) {
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   726
        netif_stop_queue(dev);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   727
        eoe->tx_queue_active = 0;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   728
    }
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   729
    spin_unlock_bh(&eoe->tx_queue_lock);
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   730
215
b021aa6eee38 EoE: TCP traffic possible; TX fragmenting to do.
Florian Pose <fp@igh-essen.com>
parents: 214
diff changeset
   731
#if EOE_DEBUG_LEVEL > 0
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   732
    EC_INFO("EoE %s TX queued frame with %u octets (%u frames queued).\n",
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   733
           eoe->dev->name, skb->len, eoe->tx_queued_frames);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   734
    if (!eoe->tx_queue_active)
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   735
        EC_WARN("EoE TX queue is now full.\n");
215
b021aa6eee38 EoE: TCP traffic possible; TX fragmenting to do.
Florian Pose <fp@igh-essen.com>
parents: 214
diff changeset
   736
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   737
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   738
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   739
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   740
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   741
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   742
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   743
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   744
   Gets statistics about the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   745
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   746
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   747
struct net_device_stats *ec_eoedev_stats(struct net_device *dev
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   748
                                         /**< EoE net_device */)
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   749
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   750
    ec_eoe_t *eoe = *((ec_eoe_t **) netdev_priv(dev));
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   751
    return &eoe->stats;
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   752
}
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   753
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   754
/*****************************************************************************/