master/ethernet.c
author Florian Pose <fp@igh-essen.com>
Tue, 01 Dec 2009 22:03:50 +0100
changeset 1570 7a2a58107dd8
parent 1561 89f6cd5b90ff
child 1581 e51cf2af3ff9
permissions -rw-r--r--
Use own PFX for printk.
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006-2008  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 and/or
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 *  modify it under the terms of the GNU General Public License version 2, as
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 *  published by the Free Software Foundation.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 *  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 along
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 *  with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  ---
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 *
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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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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 "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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/** 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 warnings.
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 * 2 = Output actions.
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 * 3 = Output actions and frame data.
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 */
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#define EOE_DEBUG_LEVEL 1
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/** Size of the EoE tx queue.
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 */
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#define EC_EOE_TX_QUEUE_SIZE 100
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/** Number of tries.
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 */
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#define EC_EOE_TRIES 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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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
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static const struct net_device_ops ec_eoedev_ops = {
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    .ndo_open = ec_eoedev_open,
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    .ndo_stop = ec_eoedev_stop,
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    .ndo_start_xmit = ec_eoedev_tx,
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    .ndo_get_stats = ec_eoedev_stats,
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};
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#endif
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/*****************************************************************************/
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/** EoE constructor.
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 *
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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 i, ret = 0;
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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_queue_size = EC_EOE_TX_QUEUE_SIZE;
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    eoe->tx_queued_frames = 0;
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    init_MUTEX(&eoe->tx_queue_sem);
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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;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   126
    eoe->tx_counter = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   127
    eoe->rx_rate = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   128
    eoe->tx_rate = 0;
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   129
    eoe->rate_jiffies = 0;
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   130
    eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   131
    eoe->tx_idle = 1;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   132
712
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   133
    /* device name eoe<MASTER>[as]<SLAVE>, because networking scripts don't
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   134
     * like hyphens etc. in interface names. */
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   135
    if (slave->sii.alias) {
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   136
        snprintf(name, EC_DATAGRAM_NAME_SIZE,
834
0791aac03180 Separated SII data from slave.
Florian Pose <fp@igh-essen.com>
parents: 770
diff changeset
   137
                "eoe%ua%u", slave->master->index, slave->sii.alias);
712
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   138
    } else {
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   139
        snprintf(name, EC_DATAGRAM_NAME_SIZE,
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   140
                "eoe%us%u", slave->master->index, slave->ring_position);
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   141
    }
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   142
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   143
    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
   144
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   145
    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
   146
        EC_ERR("Unable to allocate net_device %s for EoE handler!\n", name);
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   147
        ret = -ENODEV;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   148
        goto out_return;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   149
    }
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
    // initialize net_device
1561
89f6cd5b90ff Use net_device_ops also for EoE devices from 2.6.29 on.
Florian Pose <fp@igh-essen.com>
parents: 1552
diff changeset
   152
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
89f6cd5b90ff Use net_device_ops also for EoE devices from 2.6.29 on.
Florian Pose <fp@igh-essen.com>
parents: 1552
diff changeset
   153
    eoe->dev->netdev_ops = &ec_eoedev_ops;
89f6cd5b90ff Use net_device_ops also for EoE devices from 2.6.29 on.
Florian Pose <fp@igh-essen.com>
parents: 1552
diff changeset
   154
#else
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   155
    eoe->dev->open = ec_eoedev_open;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   156
    eoe->dev->stop = ec_eoedev_stop;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   157
    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
   158
    eoe->dev->get_stats = ec_eoedev_stats;
1561
89f6cd5b90ff Use net_device_ops also for EoE devices from 2.6.29 on.
Florian Pose <fp@igh-essen.com>
parents: 1552
diff changeset
   159
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   160
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   161
    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
   162
        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
   163
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   164
    // initialize private data
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   165
    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
   166
    *priv = eoe;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   167
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   168
    // Usually setting the MTU appropriately makes the upper layers
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   169
    // do the frame fragmenting. In some cases this doesn't work
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   170
    // 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
   171
    // is done "manually".
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   172
#if 0
1338
eb31b5a135da merge -c1621 branches/1.4-foe: Introduced configured_[tr]x_mailbox(size|offset) members of slave.
Florian Pose <fp@igh-essen.com>
parents: 1337
diff changeset
   173
    eoe->dev->mtu = slave->configured_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
   174
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   175
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   176
    // connect the net_device to the kernel
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   177
    ret = register_netdev(eoe->dev);
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   178
    if (ret) {
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   179
        EC_ERR("Unable to register net_device: error %i\n", ret);
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   180
        goto out_free;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   181
    }
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   182
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   183
    // make the last address octet unique
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   184
    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
   185
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   186
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   187
 out_free:
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   188
    free_netdev(eoe->dev);
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   189
    eoe->dev = NULL;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   190
 out_return:
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   191
    return ret;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   192
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   193
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   194
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   195
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   196
/** EoE destructor.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   197
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   198
 * Unregisteres the net_device and frees allocated memory.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   199
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   200
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
   201
{
552
029546740810 Minor: Removed warning when EoE interface is up upon master unloading.
Florian Pose <fp@igh-essen.com>
parents: 460
diff changeset
   202
    unregister_netdev(eoe->dev); // possibly calls close callback
214
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
    // 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
   205
    ec_eoe_flush(eoe);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   206
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   207
    if (eoe->tx_frame) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   208
        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
   209
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   210
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   211
1552
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   212
    if (eoe->rx_skb)
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   213
        dev_kfree_skb(eoe->rx_skb);
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   214
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   215
    free_netdev(eoe->dev);
279
12f48c1cb143 Removed mbox_command out of slave.
Florian Pose <fp@igh-essen.com>
parents: 261
diff changeset
   216
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   217
    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
   218
}
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
/*****************************************************************************/
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   221
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   222
/** Empties the transmit queue.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   223
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   224
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
   225
{
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   226
    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
   227
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   228
    down(&eoe->tx_queue_sem);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   229
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   230
    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
   231
        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
   232
        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
   233
        kfree(frame);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   234
    }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   235
    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
   236
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   237
    up(&eoe->tx_queue_sem);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   238
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   239
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   240
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   241
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   242
/** Sends a frame or the next fragment.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   243
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   244
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
   245
{
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   246
    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
   247
    unsigned int last_fragment;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   248
    uint8_t *data;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   249
#if EOE_DEBUG_LEVEL >= 3
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   250
    unsigned int i;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   251
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   252
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   253
    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
   254
1338
eb31b5a135da merge -c1621 branches/1.4-foe: Introduced configured_[tr]x_mailbox(size|offset) members of slave.
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diff changeset
   255
    if (remaining_size <= eoe->slave->configured_tx_mailbox_size - 10) {
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   256
        current_size = remaining_size;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   257
        last_fragment = 1;
1337
0253c74d0940 merge -c1619 branches/1.4-foe: Implemented going to bootstrap state BOOT.
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parents: 1327
diff changeset
   258
    } else {
1338
eb31b5a135da merge -c1621 branches/1.4-foe: Introduced configured_[tr]x_mailbox(size|offset) members of slave.
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parents: 1337
diff changeset
   259
        current_size = ((eoe->slave->configured_tx_mailbox_size - 10) / 32) * 32;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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   260
        last_fragment = 0;
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diff changeset
   261
    }
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diff changeset
   262
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   263
    if (eoe->tx_fragment_number) {
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   264
        complete_offset = eoe->tx_offset / 32;
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diff changeset
   265
    }
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diff changeset
   266
    else {
319
88f2e8c4face Minor changes.
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diff changeset
   267
        // complete size in 32 bit blocks, rounded up.
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   268
        complete_offset = remaining_size / 32 + 1;
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diff changeset
   269
    }
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   270
1486
dac749e74956 EoE transmit retry; EoE warnings.
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   271
#if EOE_DEBUG_LEVEL >= 2
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   272
    EC_DBG("EoE %s TX sending fragment %u%s with %u octets (%u)."
986
a486591ba86b Replaced misleading %i by %u.
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   273
           " %u frames queued.\n", eoe->dev->name, eoe->tx_fragment_number,
770
efa5af306318 Improved EoE debugging.
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   274
           last_fragment ? "" : "+", current_size, complete_offset,
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   275
           eoe->tx_queued_frames);
217
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diff changeset
   276
#endif
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diff changeset
   277
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dac749e74956 EoE transmit retry; EoE warnings.
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   278
#if EOE_DEBUG_LEVEL >= 3
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   279
    EC_DBG("");
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   280
    for (i = 0; i < current_size; i++) {
340
5a5f5a14c847 Fixed EoE debugging.
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diff changeset
   281
        printk("%02X ", eoe->tx_frame->skb->data[eoe->tx_offset + i]);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   282
        if ((i + 1) % 16 == 0) {
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diff changeset
   283
            printk("\n");
1484
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   284
            EC_DBG("");
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   285
        }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   286
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   287
    printk("\n");
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diff changeset
   288
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   289
1313
ed15eef57d5c Improved error case return codes of many functions.
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   290
    data = ec_slave_mbox_prepare_send(eoe->slave, &eoe->datagram,
ed15eef57d5c Improved error case return codes of many functions.
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diff changeset
   291
            0x02, current_size + 4);
ed15eef57d5c Improved error case return codes of many functions.
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diff changeset
   292
    if (IS_ERR(data))
ed15eef57d5c Improved error case return codes of many functions.
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diff changeset
   293
        return PTR_ERR(data);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   294
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   295
    EC_WRITE_U8 (data,     0x00); // eoe fragment req.
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   296
    EC_WRITE_U8 (data + 1, last_fragment);
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   297
    EC_WRITE_U16(data + 2, ((eoe->tx_fragment_number & 0x3F) |
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   298
                            (complete_offset & 0x3F) << 6 |
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   299
                            (eoe->tx_frame_number & 0x0F) << 12));
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   300
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   301
    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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diff changeset
   302
    eoe->queue_datagram = 1;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   303
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   304
    eoe->tx_offset += current_size;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   305
    eoe->tx_fragment_number++;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   306
    return 0;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   307
}
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   308
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   309
/*****************************************************************************/
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diff changeset
   310
1487
1c67e19f24b8 Minor: Changed comment style.
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diff changeset
   311
/** Runs the EoE state machine.
1c67e19f24b8 Minor: Changed comment style.
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diff changeset
   312
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   313
void ec_eoe_run(ec_eoe_t *eoe /**< EoE handler */)
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   314
{
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
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diff changeset
   315
    if (!eoe->opened)
1c9151455b65 Debug statements with EC_DBG() in EoE code.
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diff changeset
   316
        return;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   317
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   318
    // if the datagram was not sent, or is not yet received, skip this cycle
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   319
    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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parents: 719
diff changeset
   320
        return;
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   321
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   322
    // call state function
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   323
    eoe->state(eoe);
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   324
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   325
    // update statistics
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   326
    if (jiffies - eoe->rate_jiffies > HZ) {
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   327
        eoe->rx_rate = eoe->rx_counter;
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   328
        eoe->tx_rate = eoe->tx_counter;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   329
        eoe->rx_counter = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   330
        eoe->tx_counter = 0;
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   331
        eoe->rate_jiffies = jiffies;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   332
    }
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   333
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   334
    ec_datagram_output_stats(&eoe->datagram);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   335
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   336
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   337
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
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parents:
diff changeset
   338
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   339
/** Queues the datagram, if necessary.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   340
 */
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   341
void ec_eoe_queue(ec_eoe_t *eoe /**< EoE handler */)
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   342
{
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   343
   if (eoe->queue_datagram) {
1500
ed1a733efbc5 Improved the callback mechanism.
Florian Pose <fp@igh-essen.com>
parents: 1489
diff changeset
   344
       ec_master_queue_datagram_ext(eoe->slave->master, &eoe->datagram);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   345
       eoe->queue_datagram = 0;
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   346
   }
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   347
}
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   348
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   349
/*****************************************************************************/
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
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parents: 719
diff changeset
   350
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   351
/** Returns the state of the device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   352
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   353
 * \return 1 if the device is "up", 0 if it is "down"
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   354
 */
661
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   355
int ec_eoe_is_open(const ec_eoe_t *eoe /**< EoE handler */)
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   356
{
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   357
    return eoe->opened;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   358
}
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   359
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   360
/*****************************************************************************/
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   361
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   362
/** Returns the idle state.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   363
 *
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   364
 * \retval 1 The device is idle.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   365
 * \retval 0 The device is busy.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   366
 */
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   367
int ec_eoe_is_idle(const ec_eoe_t *eoe /**< EoE handler */)
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   368
{
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   369
    return eoe->rx_idle && eoe->tx_idle;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   370
}
f77a1182b6f4 EoE processing with kthread.
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parents: 1488
diff changeset
   371
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   372
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   373
 *  STATE PROCESSING FUNCTIONS
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   374
 *****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   375
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   376
/** State: RX_START.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   377
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   378
 * Starts a new receiving sequence by queueing a datagram that checks the
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   379
 * slave's mailbox for a new EoE datagram.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   380
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   381
void ec_eoe_state_rx_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
   382
{
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   383
    if (eoe->slave->error_flag ||
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   384
            !eoe->slave->master->main_device.link_state) {
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   385
        eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   386
        eoe->tx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   387
        return;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   388
    }
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   389
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   390
    ec_slave_mbox_prepare_check(eoe->slave, &eoe->datagram);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
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_check;
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
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   397
/** State: RX_CHECK.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   398
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   399
 * Processes the checking datagram sent in RX_START and issues a receive
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   400
 * datagram, if new data is available.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   401
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   402
void ec_eoe_state_rx_check(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
   403
{
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   404
    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
   405
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   406
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   407
        EC_WARN("Failed to receive mbox check datagram for %s.\n",
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   408
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   409
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   410
        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
   411
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   412
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   413
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   414
    if (!ec_slave_mbox_check(&eoe->datagram)) {
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   415
        eoe->rx_idle = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   416
        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
   417
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   418
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   419
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   420
    eoe->rx_idle = 0;
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   421
    ec_slave_mbox_prepare_fetch(eoe->slave, &eoe->datagram);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   422
    eoe->queue_datagram = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   423
    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
   424
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   425
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   426
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   427
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   428
/** State: RX_FETCH.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   429
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   430
 * Checks if the requested data of RX_CHECK was received and processes the EoE
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   431
 * datagram.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   432
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   433
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
   434
{
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   435
    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
   436
    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
   437
    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
   438
    off_t offset;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   439
#if EOE_DEBUG_LEVEL >= 3
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   440
    unsigned int i;
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   441
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   442
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   443
    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
   444
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   445
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   446
        EC_WARN("Failed to receive mbox fetch datagram for %s.\n",
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   447
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   448
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   449
        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
   450
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   451
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   452
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   453
    data = ec_slave_mbox_fetch(eoe->slave, &eoe->datagram,
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   454
            &mbox_prot, &rec_size);
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   455
    if (IS_ERR(data)) {
390
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   456
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   457
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   458
        EC_WARN("Invalid mailbox response for %s.\n",
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   459
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   460
#endif
390
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   461
        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
   462
        return;
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   463
    }
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   464
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   465
    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
   466
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   467
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   468
        EC_WARN("Other mailbox protocol response for %s.\n",
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   469
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   470
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   471
        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
   472
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   473
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   474
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   475
    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
   476
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   477
    if (frame_type != 0x00) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   478
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   479
        EC_WARN("%s: Other frame received. Dropping.\n", eoe->dev->name);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   480
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   481
        eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   482
        eoe->state = ec_eoe_state_tx_start;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   483
        return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   484
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   485
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   486
    // EoE Fragment Request received
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
    last_fragment = (EC_READ_U16(data) >> 8) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   489
    time_appended = (EC_READ_U16(data) >> 9) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   490
    fragment_number = EC_READ_U16(data + 2) & 0x003F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   491
    fragment_offset = (EC_READ_U16(data + 2) >> 6) & 0x003F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   492
    frame_number = (EC_READ_U16(data + 2) >> 12) & 0x000F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   493
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   494
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   495
    EC_DBG("EoE %s RX fragment %u%s, offset %u, frame %u%s,"
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   496
           " %u octets\n", eoe->dev->name, fragment_number,
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   497
           last_fragment ? "" : "+", fragment_offset, frame_number, 
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   498
           time_appended ? ", + timestamp" : "",
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   499
           time_appended ? rec_size - 8 : rec_size - 4);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   500
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   501
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   502
#if EOE_DEBUG_LEVEL >= 3
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   503
    EC_DBG("");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   504
    for (i = 0; i < rec_size - 4; i++) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   505
        printk("%02X ", data[i + 4]);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   506
        if ((i + 1) % 16 == 0) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   507
            printk("\n");
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   508
            EC_DBG("");
322
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
    printk("\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   512
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   513
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   514
    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
   515
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   516
    if (!fragment_number) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   517
        if (eoe->rx_skb) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   518
            EC_WARN("EoE RX freeing old socket buffer...\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   519
            dev_kfree_skb(eoe->rx_skb);
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
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   522
        // new socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   523
        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
   524
            if (printk_ratelimit())
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   525
                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
   526
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   527
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   528
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   529
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   530
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   531
        eoe->rx_skb_offset = 0;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   532
        eoe->rx_skb_size = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   533
        eoe->rx_expected_fragment = 0;
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
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   536
        if (!eoe->rx_skb) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   537
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   538
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   539
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   540
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   541
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   542
        offset = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   543
        if (offset != eoe->rx_skb_offset ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   544
            offset + data_size > eoe->rx_skb_size ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   545
            fragment_number != eoe->rx_expected_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   546
            dev_kfree_skb(eoe->rx_skb);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   547
            eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   548
            eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   549
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   550
            EC_WARN("Fragmenting error at %s.\n", eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   551
#endif
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   552
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   553
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   554
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   555
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   556
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   557
    // copy fragment into socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   558
    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
   559
    eoe->rx_skb_offset += data_size;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   560
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   561
    if (last_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   562
        // update statistics
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   563
        eoe->stats.rx_packets++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   564
        eoe->stats.rx_bytes += eoe->rx_skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   565
        eoe->rx_counter += eoe->rx_skb->len;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   566
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   567
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   568
        EC_DBG("EoE %s RX frame completed with %u octets.\n",
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   569
               eoe->dev->name, eoe->rx_skb->len);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   570
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   571
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   572
        // pass socket buffer to network stack
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   573
        eoe->rx_skb->dev = eoe->dev;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   574
        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
   575
        eoe->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   576
        if (netif_rx(eoe->rx_skb)) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   577
            EC_WARN("EoE RX netif_rx failed.\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   578
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   579
        eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   580
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   581
        eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   582
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   583
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   584
        eoe->rx_expected_fragment++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   585
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   586
        EC_DBG("EoE %s RX expecting fragment %u\n",
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   587
               eoe->dev->name, eoe->rx_expected_fragment);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   588
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   589
        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
   590
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   591
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   592
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
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   595
/** State: TX START.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   596
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   597
 * Starts a new transmit sequence. If no data is available, a new receive
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   598
 * sequence is started instead.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   599
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   600
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
   601
{
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   602
#if EOE_DEBUG_LEVEL >= 2
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   603
    unsigned int wakeup = 0;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   604
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   605
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   606
    if (eoe->slave->error_flag ||
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   607
            !eoe->slave->master->main_device.link_state) {
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   608
        eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   609
        eoe->tx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   610
        return;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   611
    }
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   612
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   613
    down(&eoe->tx_queue_sem);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   614
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   615
    if (!eoe->tx_queued_frames || list_empty(&eoe->tx_queue)) {
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   616
        up(&eoe->tx_queue_sem);
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   617
        eoe->tx_idle = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   618
        // no data available.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   619
        // start a new receive immediately.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   620
        ec_eoe_state_rx_start(eoe);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   621
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   622
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   623
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   624
    // 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
   625
    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
   626
    list_del(&eoe->tx_frame->queue);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   627
    if (!eoe->tx_queue_active &&
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   628
        eoe->tx_queued_frames == eoe->tx_queue_size / 2) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   629
        netif_wake_queue(eoe->dev);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   630
        eoe->tx_queue_active = 1;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   631
#if EOE_DEBUG_LEVEL >= 2
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   632
        wakeup = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   633
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   634
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   635
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   636
    eoe->tx_queued_frames--;
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   637
    up(&eoe->tx_queue_sem);
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   638
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   639
    eoe->tx_idle = 0;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   640
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   641
    eoe->tx_frame_number++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   642
    eoe->tx_frame_number %= 16;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   643
    eoe->tx_fragment_number = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   644
    eoe->tx_offset = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   645
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   646
    if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   647
        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
   648
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   649
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   650
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   651
        eoe->state = ec_eoe_state_rx_start;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   652
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   653
        EC_WARN("Send error at %s.\n", eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   654
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   655
        return;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   656
    }
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   657
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   658
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   659
    if (wakeup)
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   660
        EC_DBG("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
   661
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   662
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   663
    eoe->tries = EC_EOE_TRIES;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   664
    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
   665
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   666
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   667
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   668
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   669
/** State: TX SENT.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   670
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   671
 * Checks is the previous transmit datagram succeded and sends the next
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   672
 * fragment, if necessary.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   673
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   674
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
   675
{
325
7833cf70c4f2 VERSION 1.1: New realtime interface, only state machines.
Florian Pose <fp@igh-essen.com>
parents: 322
diff changeset
   676
    if (eoe->datagram.state != EC_DATAGRAM_RECEIVED) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   677
        if (eoe->tries) {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   678
            eoe->tries--; // try again
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   679
            eoe->queue_datagram = 1;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   680
        } else {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   681
            eoe->stats.tx_errors++;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   682
#if EOE_DEBUG_LEVEL >= 1
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   683
            EC_WARN("Failed to receive send datagram for %s after %u tries.\n",
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   684
                    eoe->dev->name, EC_EOE_TRIES);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   685
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   686
            eoe->state = ec_eoe_state_rx_start;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   687
        }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   688
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   689
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   690
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   691
    if (eoe->datagram.working_counter != 1) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   692
        if (eoe->tries) {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   693
            eoe->tries--; // try again
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   694
            eoe->queue_datagram = 1;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   695
        } else {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   696
            eoe->stats.tx_errors++;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   697
#if EOE_DEBUG_LEVEL >= 1
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   698
            EC_WARN("No sending response for %s after %u tries.\n",
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   699
                    eoe->dev->name, EC_EOE_TRIES);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   700
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   701
            eoe->state = ec_eoe_state_rx_start;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   702
        }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   703
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   704
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   705
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   706
    // frame completely sent
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   707
    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
   708
        eoe->stats.tx_packets++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   709
        eoe->stats.tx_bytes += eoe->tx_frame->skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   710
        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
   711
        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
   712
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   713
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   714
        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
   715
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   716
    else { // send next fragment
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   717
        if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   718
            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
   719
            kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   720
            eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   721
            eoe->stats.tx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   722
#if EOE_DEBUG_LEVEL >= 1
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   723
        EC_WARN("Send error at %s.\n", eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   724
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   725
            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
   726
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   727
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   728
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   729
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   730
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   731
 *  NET_DEVICE functions
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   732
 *****************************************************************************/
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   733
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   734
/** Opens the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   735
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   736
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
   737
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   738
    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
   739
    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
   740
    eoe->opened = 1;
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   741
    eoe->rx_idle = 0;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   742
    eoe->tx_idle = 0;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   743
    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
   744
    eoe->tx_queue_active = 1;
1488
3fb343e3fac0 Output device opened/closed only on debug level 2.
Florian Pose <fp@igh-essen.com>
parents: 1487
diff changeset
   745
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   746
    EC_DBG("%s opened.\n", dev->name);
1488
3fb343e3fac0 Output device opened/closed only on debug level 2.
Florian Pose <fp@igh-essen.com>
parents: 1487
diff changeset
   747
#endif
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   748
    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
   749
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   750
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   751
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   752
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   753
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   754
/** Stops the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   755
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   756
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
   757
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   758
    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
   759
    netif_stop_queue(dev);
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   760
    eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   761
    eoe->tx_idle = 1;
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   762
    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
   763
    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
   764
    ec_eoe_flush(eoe);
1488
3fb343e3fac0 Output device opened/closed only on debug level 2.
Florian Pose <fp@igh-essen.com>
parents: 1487
diff changeset
   765
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   766
    EC_DBG("%s stopped.\n", dev->name);
1488
3fb343e3fac0 Output device opened/closed only on debug level 2.
Florian Pose <fp@igh-essen.com>
parents: 1487
diff changeset
   767
#endif
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   768
    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
   769
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   770
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   771
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   772
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   773
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   774
/** Transmits data via the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   775
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   776
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
   777
                 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
   778
                )
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   779
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   780
    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
   781
    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
   782
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   783
#if 0
1338
eb31b5a135da merge -c1621 branches/1.4-foe: Introduced configured_[tr]x_mailbox(size|offset) members of slave.
Florian Pose <fp@igh-essen.com>
parents: 1337
diff changeset
   784
    if (skb->len > eoe->slave->configured_tx_mailbox_size - 10) {
986
a486591ba86b Replaced misleading %i by %u.
Florian Pose <fp@igh-essen.com>
parents: 906
diff changeset
   785
        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
   786
        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
   787
        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
   788
        return 0;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   789
    }
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   790
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   791
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   792
    if (!(frame =
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   793
          (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
   794
        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
   795
            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
   796
        return 1;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   797
    }
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   798
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   799
    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
   800
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   801
    down(&eoe->tx_queue_sem);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   802
    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
   803
    eoe->tx_queued_frames++;
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   804
    if (eoe->tx_queued_frames == 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
   805
        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
   806
        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
   807
    }
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   808
    up(&eoe->tx_queue_sem);
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   809
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   810
#if EOE_DEBUG_LEVEL >= 2
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   811
    EC_DBG("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
   812
           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
   813
    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
   814
        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
   815
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   816
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   817
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   818
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   819
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   820
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   821
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   822
/** Gets statistics about the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   823
 */
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   824
struct net_device_stats *ec_eoedev_stats(
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   825
        struct net_device *dev /**< EoE net_device */
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   826
        )
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   827
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   828
    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
   829
    return &eoe->stats;
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   830
}
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   831
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   832
/*****************************************************************************/