master/ethernet.c
author Florian Pose <fp@igh-essen.com>
Tue, 04 Sep 2012 14:19:06 +0200
changeset 2411 01370d59233d
parent 2240 b45438edf869
child 2589 2b9c78543663
permissions -rw-r--r--
Malformed hg keywords.
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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/version.h>
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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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/** Device operations for EoE interfaces.
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 */
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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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    ec_mbox_init(&eoe->mbox,&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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    ec_mutex_init(&eoe->tx_queue_mutex);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   127
    eoe->tx_frame_number = 0xFF;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   128
    memset(&eoe->stats, 0, sizeof(struct net_device_stats));
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   129
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   130
    eoe->rx_counter = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   131
    eoe->tx_counter = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   132
    eoe->rx_rate = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   133
    eoe->tx_rate = 0;
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   134
    eoe->rate_jiffies = 0;
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   135
    eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   136
    eoe->tx_idle = 1;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   137
712
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   138
    /* 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
   139
     * like hyphens etc. in interface names. */
1909
ea3eb4c74c1b Introduced effective_alias variable to separate reg12 alias from SII alias.
Florian Pose <fp@igh-essen.com>
parents: 1907
diff changeset
   140
    if (slave->effective_alias) {
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   141
        snprintf(name, EC_DATAGRAM_NAME_SIZE,
1909
ea3eb4c74c1b Introduced effective_alias variable to separate reg12 alias from SII alias.
Florian Pose <fp@igh-essen.com>
parents: 1907
diff changeset
   142
                "eoe%ua%u", slave->master->index, slave->effective_alias);
712
14f899ac51f0 Create network interfaces for EoE devices with alias as eoeXaY.
Florian Pose <fp@igh-essen.com>
parents: 689
diff changeset
   143
    } else {
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   144
        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
   145
                "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
   146
    }
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   147
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   148
    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
   149
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   150
    if (!(eoe->dev = alloc_netdev(sizeof(ec_eoe_t *), name, ether_setup))) {
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   151
        EC_SLAVE_ERR(slave, "Unable to allocate net_device %s"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   152
                " 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
   153
        ret = -ENODEV;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   154
        goto out_return;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   155
    }
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   156
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   157
    // 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
   158
#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
   159
    eoe->dev->netdev_ops = &ec_eoedev_ops;
1579
326d47aa986c applied komax patch to version r1822
Martin Troxler <martin.troxler@komaxgroup.com>
parents: 1500
diff changeset
   160
#else
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   161
    eoe->dev->open = ec_eoedev_open;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   162
    eoe->dev->stop = ec_eoedev_stop;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   163
    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
   164
    eoe->dev->get_stats = ec_eoedev_stats;
1579
326d47aa986c applied komax patch to version r1822
Martin Troxler <martin.troxler@komaxgroup.com>
parents: 1500
diff changeset
   165
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   166
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   167
    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
   168
        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
   169
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   170
    // initialize private data
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   171
    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
   172
    *priv = eoe;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   173
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   174
    // 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
   175
    // 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
   176
    // 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
   177
    // is done "manually".
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   178
#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
   179
    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
   180
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   181
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   182
    // 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
   183
    ret = register_netdev(eoe->dev);
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   184
    if (ret) {
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   185
        EC_SLAVE_ERR(slave, "Unable to register net_device:"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   186
                " error %i\n", ret);
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   187
        goto out_free;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   188
    }
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   189
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   190
    // make the last address octet unique
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   191
    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
   192
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   193
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   194
 out_free:
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   195
    free_netdev(eoe->dev);
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   196
    eoe->dev = NULL;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   197
 out_return:
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   198
    return ret;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   199
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   200
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   201
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   202
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   203
/** EoE destructor.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   204
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   205
 * Unregisteres the net_device and frees allocated memory.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   206
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   207
void ec_eoe_clear(ec_eoe_t *eoe /**< EoE handler */)
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   208
{
552
029546740810 Minor: Removed warning when EoE interface is up upon master unloading.
Florian Pose <fp@igh-essen.com>
parents: 460
diff changeset
   209
    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
   210
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   211
    // 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
   212
    ec_eoe_flush(eoe);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   213
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   214
    if (eoe->tx_frame) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   215
        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
   216
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   217
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   218
1552
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   219
    if (eoe->rx_skb)
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   220
        dev_kfree_skb(eoe->rx_skb);
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   221
c9e2c3be294e Later freeing of netdev.
Florian Pose <fp@igh-essen.com>
parents: 1500
diff changeset
   222
    free_netdev(eoe->dev);
279
12f48c1cb143 Removed mbox_command out of slave.
Florian Pose <fp@igh-essen.com>
parents: 261
diff changeset
   223
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   224
    ec_mbox_clear(&eoe->mbox);
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   225
    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
   226
}
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   227
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   228
/*****************************************************************************/
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   229
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   230
/** Empties the transmit queue.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   231
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   232
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
   233
{
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   234
    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
   235
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   236
    ec_mutex_lock(&eoe->tx_queue_mutex);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   237
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   238
    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
   239
        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
   240
        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
   241
        kfree(frame);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   242
    }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   243
    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
   244
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   245
    ec_mutex_unlock(&eoe->tx_queue_mutex);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   246
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   247
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   248
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   249
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   250
/** Sends a frame or the next fragment.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   251
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   252
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
   253
{
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   254
    size_t remaining_size, current_size, complete_offset;
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diff changeset
   255
    unsigned int last_fragment;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   256
    uint8_t *data;
1486
dac749e74956 EoE transmit retry; EoE warnings.
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diff changeset
   257
#if EOE_DEBUG_LEVEL >= 3
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   258
    unsigned int i;
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diff changeset
   259
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   260
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   261
    remaining_size = eoe->tx_frame->skb->len - eoe->tx_offset;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   262
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
   263
    if (remaining_size <= eoe->slave->configured_tx_mailbox_size - 10) {
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
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diff changeset
   264
        current_size = remaining_size;
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diff changeset
   265
        last_fragment = 1;
1337
0253c74d0940 merge -c1619 branches/1.4-foe: Implemented going to bootstrap state BOOT.
Florian Pose <fp@igh-essen.com>
parents: 1327
diff changeset
   266
    } else {
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
   267
        current_size = ((eoe->slave->configured_tx_mailbox_size - 10) / 32) * 32;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   268
        last_fragment = 0;
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diff changeset
   269
    }
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diff changeset
   270
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diff changeset
   271
    if (eoe->tx_fragment_number) {
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   272
        complete_offset = eoe->tx_offset / 32;
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diff changeset
   273
    }
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diff changeset
   274
    else {
319
88f2e8c4face Minor changes.
Florian Pose <fp@igh-essen.com>
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diff changeset
   275
        // complete size in 32 bit blocks, rounded up.
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   276
        complete_offset = remaining_size / 32 + 1;
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diff changeset
   277
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   278
1486
dac749e74956 EoE transmit retry; EoE warnings.
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diff changeset
   279
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
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diff changeset
   280
    EC_SLAVE_DBG(slave, 0, "EoE %s TX sending fragment %u%s"
d9cf40facbc4 Improved syslog macros.
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diff changeset
   281
            " with %u octets (%u). %u frames queued.\n",
d9cf40facbc4 Improved syslog macros.
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parents: 1909
diff changeset
   282
            eoe->dev->name, eoe->tx_fragment_number,
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   283
            last_fragment ? "" : "+", current_size, complete_offset,
d9cf40facbc4 Improved syslog macros.
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parents: 1909
diff changeset
   284
            eoe->tx_queued_frames);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   285
#endif
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parents: 216
diff changeset
   286
1486
dac749e74956 EoE transmit retry; EoE warnings.
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diff changeset
   287
#if EOE_DEBUG_LEVEL >= 3
1921
d9cf40facbc4 Improved syslog macros.
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parents: 1909
diff changeset
   288
    EC_SLAVE_DBG(master, 0, "");
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   289
    for (i = 0; i < current_size; i++) {
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   290
        printk("%02X ", eoe->tx_frame->skb->data[eoe->tx_offset + i]);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   291
        if ((i + 1) % 16 == 0) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   292
            printk("\n");
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   293
            EC_SLAVE_DBG(master, 0, "");
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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parents: 216
diff changeset
   295
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   296
    printk("\n");
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   297
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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diff changeset
   298
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   299
    data = ec_slave_mbox_prepare_send(eoe->slave, &eoe->mbox,
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   300
            0x02, current_size + 4);
ed15eef57d5c Improved error case return codes of many functions.
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parents: 1209
diff changeset
   301
    if (IS_ERR(data))
ed15eef57d5c Improved error case return codes of many functions.
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parents: 1209
diff changeset
   302
        return PTR_ERR(data);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   303
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   304
    EC_WRITE_U8 (data,     0x00); // eoe fragment req.
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   305
    EC_WRITE_U8 (data + 1, last_fragment);
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   306
    EC_WRITE_U16(data + 2, ((eoe->tx_fragment_number & 0x3F) |
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   307
                            (complete_offset & 0x3F) << 6 |
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   308
                            (eoe->tx_frame_number & 0x0F) << 12));
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   309
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   310
    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
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   311
    eoe->queue_datagram = 1;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   312
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   313
    eoe->tx_offset += current_size;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   314
    eoe->tx_fragment_number++;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   315
    return 0;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   316
}
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   317
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   318
/*****************************************************************************/
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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parents: 216
diff changeset
   319
1487
1c67e19f24b8 Minor: Changed comment style.
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parents: 1486
diff changeset
   320
/** Runs the EoE state machine.
1c67e19f24b8 Minor: Changed comment style.
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parents: 1486
diff changeset
   321
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   322
void ec_eoe_run(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
   323
{
1484
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   324
    if (!eoe->opened)
1c9151455b65 Debug statements with EC_DBG() in EoE code.
Florian Pose <fp@igh-essen.com>
parents: 1363
diff changeset
   325
        return;
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   326
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   327
    // if the datagram was not sent, or is not yet received, skip this cycle
2020
47db5df5c7b3 removed eoe thread: eoe processing now done by Idle/Operation thread
Martin Troxler <ch1010277@ch10pc446>
parents: 1921
diff changeset
   328
    if (eoe->queue_datagram ||
2094
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   329
        ec_mbox_is_datagram_state(&eoe->mbox, EC_DATAGRAM_QUEUED) ||
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   330
        ec_mbox_is_datagram_state(&eoe->mbox, EC_DATAGRAM_SENT)) {
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   331
        return;
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
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
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   334
    // call state function
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   335
    eoe->state(eoe);
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   337
    // update statistics
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   338
    if (jiffies - eoe->rate_jiffies > HZ) {
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   339
        eoe->rx_rate = eoe->rx_counter;
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   340
        eoe->tx_rate = eoe->tx_counter;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   341
        eoe->rx_counter = 0;
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   342
        eoe->tx_counter = 0;
344
5d8281f1aa2a Replaced longer cycle timestamps with jiffies.
Florian Pose <fp@igh-essen.com>
parents: 340
diff changeset
   343
        eoe->rate_jiffies = jiffies;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   344
    }
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   345
719
03d5b96632fb Store skipped information in datagrams; name datagrams for statistics
Florian Pose <fp@igh-essen.com>
parents: 712
diff changeset
   346
    ec_datagram_output_stats(&eoe->datagram);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   347
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   348
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   349
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   350
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   351
/** Queues the datagram, if necessary.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   352
 */
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   353
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
   354
{
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   355
   if (eoe->queue_datagram) {
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   356
       ec_master_mbox_queue_datagrams(eoe->slave->master, &eoe->mbox);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   357
       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
   358
   }
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   359
}
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   360
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   361
/*****************************************************************************/
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   362
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   363
/** Returns the state of the device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   364
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   365
 * \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
   366
 */
661
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   367
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
   368
{
bc1de1362efb Dynamic creation of EoE handlers.
Florian Pose <fp@igh-essen.com>
parents: 629
diff changeset
   369
    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
   370
}
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   371
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   372
/*****************************************************************************/
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   373
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   374
/** Returns the idle state.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   375
 *
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   376
 * \retval 1 The device is idle.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   377
 * \retval 0 The device is busy.
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   378
 */
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   379
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
   380
{
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   381
    return eoe->rx_idle && eoe->tx_idle;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   382
}
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   383
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   384
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   385
 *  STATE PROCESSING FUNCTIONS
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   386
 *****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   387
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   388
/** State: RX_START.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   389
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   390
 * 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
   391
 * slave's mailbox for a new EoE datagram.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   392
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   393
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
   394
{
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   395
    if (eoe->slave->error_flag ||
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   396
            !eoe->slave->master->main_device.link_state) {
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   397
        eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   398
        eoe->tx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   399
        return;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   400
    }
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   401
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   402
    ec_slave_mbox_prepare_check(eoe->slave, &eoe->mbox);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   403
    eoe->queue_datagram = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   404
    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
   405
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   406
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   407
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   408
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   409
/** State: RX_CHECK.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   410
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   411
 * 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
   412
 * datagram, if new data is available.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   413
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   414
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
   415
{
2094
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   416
    if (!ec_mbox_is_datagram_state(&eoe->mbox, EC_DATAGRAM_RECEIVED)) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   417
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   418
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   419
        EC_SLAVE_WARN(eoe->slave, "Failed to receive mbox"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   420
                " check datagram for %s.\n", eoe->dev->name);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   421
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   422
        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
   423
        return;
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
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   426
    if (!ec_slave_mbox_check(&eoe->mbox)) {
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   427
        eoe->rx_idle = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   428
        eoe->state = ec_eoe_state_tx_start;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   429
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   430
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   431
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   432
    eoe->rx_idle = 0;
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   433
    ec_slave_mbox_prepare_fetch(eoe->slave, &eoe->mbox);
721
ebc2fd3e09e5 Improved EoE handling: Avoided skipping of datagrams and release lock
Florian Pose <fp@igh-essen.com>
parents: 719
diff changeset
   434
    eoe->queue_datagram = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   435
    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
   436
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   437
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   438
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   439
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   440
/** State: RX_FETCH.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   441
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   442
 * 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
   443
 * datagram.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   444
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   445
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
   446
{
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   447
    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
   448
    uint8_t *data, frame_type, last_fragment, time_appended, mbox_prot;
2240
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   449
    uint8_t fragment_offset, fragment_number;
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   450
#if EOE_DEBUG_LEVEL >= 2
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   451
    uint8_t frame_number;
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   452
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   453
    off_t offset;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   454
#if EOE_DEBUG_LEVEL >= 3
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   455
    unsigned int i;
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   456
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   457
2094
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   458
    if (!ec_mbox_is_datagram_state(&eoe->mbox, EC_DATAGRAM_RECEIVED)) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   459
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   460
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   461
        EC_SLAVE_WARN(eoe->slave, "Failed to receive mbox"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   462
                " fetch datagram for %s.\n", eoe->dev->name);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   463
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   464
        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
   465
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   466
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   467
2045
ff2a13a4603c Reduced frame size when sending to mailbox, uses 2 datagrams. Enabled with configure option --enable-mboxframesize
Martin Troxler <ch1010277@ch10pc446>
parents: 2044
diff changeset
   468
    data = ec_slave_mbox_fetch(eoe->slave, &eoe->mbox,
1313
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   469
            &mbox_prot, &rec_size);
ed15eef57d5c Improved error case return codes of many functions.
Florian Pose <fp@igh-essen.com>
parents: 1209
diff changeset
   470
    if (IS_ERR(data)) {
390
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   471
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   472
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   473
        EC_SLAVE_WARN(eoe->slave, "Invalid mailbox response for %s.\n",
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   474
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   475
#endif
390
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   476
        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
   477
        return;
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   478
    }
685c267d80d8 Fixed mailbox bug, added mailbox error codes.
Florian Pose <fp@igh-essen.com>
parents: 344
diff changeset
   479
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   480
    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
   481
        eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   482
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   483
        EC_SLAVE_WARN(eoe->slave, "Other mailbox protocol response for %s.\n",
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   484
                eoe->dev->name);
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   485
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   486
        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
   487
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   488
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   489
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   490
    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
   491
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   492
    if (frame_type != 0x00) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   493
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   494
        EC_SLAVE_WARN(eoe->slave, "%s: Other frame received."
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   495
                " Dropping.\n", eoe->dev->name);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   496
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   497
        eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   498
        eoe->state = ec_eoe_state_tx_start;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   499
        return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   500
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   501
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   502
    // EoE Fragment Request received
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   503
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   504
    last_fragment = (EC_READ_U16(data) >> 8) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   505
    time_appended = (EC_READ_U16(data) >> 9) & 0x0001;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   506
    fragment_number = EC_READ_U16(data + 2) & 0x003F;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   507
    fragment_offset = (EC_READ_U16(data + 2) >> 6) & 0x003F;
2240
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   508
#if EOE_DEBUG_LEVEL >= 2
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   509
    frame_number = (EC_READ_U16(data + 2) >> 12) & 0x000F;
2240
b45438edf869 Avoided unused variable warnings.
Florian Pose <fp@igh-essen.com>
parents: 2094
diff changeset
   510
#endif
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   511
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   512
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   513
    EC_SLAVE_DBG(eoe->slave, 0, "EoE %s RX fragment %u%s, offset %u,"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   514
            " frame %u%s, %u octets\n", eoe->dev->name, fragment_number,
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   515
           last_fragment ? "" : "+", fragment_offset, frame_number, 
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   516
           time_appended ? ", + timestamp" : "",
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   517
           time_appended ? rec_size - 8 : rec_size - 4);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   518
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   519
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   520
#if EOE_DEBUG_LEVEL >= 3
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   521
    EC_SLAVE_DBG(eoe->slave, 0, "");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   522
    for (i = 0; i < rec_size - 4; i++) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   523
        printk("%02X ", data[i + 4]);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   524
        if ((i + 1) % 16 == 0) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   525
            printk("\n");
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   526
            EC_SLAVE_DBG(eoe->slave, 0, "");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   527
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   528
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   529
    printk("\n");
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   530
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   531
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   532
    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
   533
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   534
    if (!fragment_number) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   535
        if (eoe->rx_skb) {
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   536
            EC_SLAVE_WARN(eoe->slave, "EoE RX freeing old socket buffer.\n");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   537
            dev_kfree_skb(eoe->rx_skb);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   538
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   539
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   540
        // new socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   541
        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
   542
            if (printk_ratelimit())
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   543
                EC_SLAVE_WARN(eoe->slave, "EoE RX low on mem,"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   544
                        " frame dropped.\n");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   545
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   546
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   547
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   548
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   549
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   550
        eoe->rx_skb_offset = 0;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   551
        eoe->rx_skb_size = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   552
        eoe->rx_expected_fragment = 0;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   553
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   554
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   555
        if (!eoe->rx_skb) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   556
            eoe->stats.rx_dropped++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   557
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   558
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   559
        }
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
        offset = fragment_offset * 32;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   562
        if (offset != eoe->rx_skb_offset ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   563
            offset + data_size > eoe->rx_skb_size ||
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   564
            fragment_number != eoe->rx_expected_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   565
            dev_kfree_skb(eoe->rx_skb);
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   566
            eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   567
            eoe->stats.rx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   568
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   569
            EC_SLAVE_WARN(eoe->slave, "Fragmenting error at %s.\n",
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   570
                    eoe->dev->name);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   571
#endif
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   572
            eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   573
            return;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   574
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   575
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   576
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   577
    // copy fragment into socket buffer
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   578
    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
   579
    eoe->rx_skb_offset += data_size;
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
    if (last_fragment) {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   582
        // update statistics
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   583
        eoe->stats.rx_packets++;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   584
        eoe->stats.rx_bytes += eoe->rx_skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   585
        eoe->rx_counter += eoe->rx_skb->len;
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   586
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   587
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   588
        EC_SLAVE_DBG(eoe->slave, 0, "EoE %s RX frame completed"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   589
                " with %u octets.\n", eoe->dev->name, eoe->rx_skb->len);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   590
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   591
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   592
        // pass socket buffer to network stack
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   593
        eoe->rx_skb->dev = eoe->dev;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   594
        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
   595
        eoe->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   596
        if (netif_rx(eoe->rx_skb)) {
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   597
            EC_SLAVE_WARN(eoe->slave, "EoE RX netif_rx failed.\n");
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   598
        }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   599
        eoe->rx_skb = NULL;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   600
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   601
        eoe->state = ec_eoe_state_tx_start;
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   602
    }
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   603
    else {
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   604
        eoe->rx_expected_fragment++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   605
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   606
        EC_SLAVE_DBG(eoe->slave, 0, "EoE %s RX expecting fragment %u\n",
770
efa5af306318 Improved EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 721
diff changeset
   607
               eoe->dev->name, eoe->rx_expected_fragment);
322
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   608
#endif
fceb7b6e0a06 Improved EoE state machine.
Florian Pose <fp@igh-essen.com>
parents: 319
diff changeset
   609
        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
   610
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   611
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   612
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   613
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   614
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   615
/** State: TX START.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   616
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   617
 * 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
   618
 * sequence is started instead.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   619
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   620
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
   621
{
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   622
#if EOE_DEBUG_LEVEL >= 2
340
5a5f5a14c847 Fixed EoE debugging.
Florian Pose <fp@igh-essen.com>
parents: 339
diff changeset
   623
    unsigned int wakeup = 0;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   624
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   625
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   626
    if (eoe->slave->error_flag ||
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   627
            !eoe->slave->master->main_device.link_state) {
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   628
        eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   629
        eoe->tx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   630
        return;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   631
    }
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   632
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   633
    ec_mutex_lock(&eoe->tx_queue_mutex);
218
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
    if (!eoe->tx_queued_frames || list_empty(&eoe->tx_queue)) {
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   636
        ec_mutex_unlock(&eoe->tx_queue_mutex);
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   637
        eoe->tx_idle = 1;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   638
        // no data available.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   639
        // start a new receive immediately.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   640
        ec_eoe_state_rx_start(eoe);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   641
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   642
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   643
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   644
    // 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
   645
    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
   646
    list_del(&eoe->tx_frame->queue);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   647
    if (!eoe->tx_queue_active &&
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   648
        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
   649
        netif_wake_queue(eoe->dev);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   650
        eoe->tx_queue_active = 1;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   651
#if EOE_DEBUG_LEVEL >= 2
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   652
        wakeup = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   653
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   654
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   655
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   656
    eoe->tx_queued_frames--;
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   657
    ec_mutex_unlock(&eoe->tx_queue_mutex);
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   658
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   659
    eoe->tx_idle = 0;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   660
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   661
    eoe->tx_frame_number++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   662
    eoe->tx_frame_number %= 16;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   663
    eoe->tx_fragment_number = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   664
    eoe->tx_offset = 0;
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
    if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   667
        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
   668
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   669
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   670
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   671
        eoe->state = ec_eoe_state_rx_start;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   672
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   673
        EC_SLAVE_WARN(eoe->slave, "Send error at %s.\n", eoe->dev->name);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   674
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   675
        return;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   676
    }
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   677
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   678
#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
   679
    if (wakeup)
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   680
        EC_SLAVE_DBG(eoe->slave, 0, "EoE %s waking up TX queue...\n",
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   681
                eoe->dev->name);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   682
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   683
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   684
    eoe->tries = EC_EOE_TRIES;
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   685
    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
   686
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   687
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   688
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   689
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   690
/** State: TX SENT.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   691
 *
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   692
 * 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
   693
 * fragment, if necessary.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   694
 */
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   695
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
   696
{
2094
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   697
    if (!ec_mbox_is_datagram_state(&eoe->mbox, EC_DATAGRAM_RECEIVED)) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   698
        if (eoe->tries) {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   699
            eoe->tries--; // try again
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   700
            eoe->queue_datagram = 1;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   701
        } else {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   702
            eoe->stats.tx_errors++;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   703
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   704
            EC_SLAVE_WARN(eoe->slave, "Failed to receive send"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   705
                    " datagram for %s after %u tries.\n",
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   706
                    eoe->dev->name, EC_EOE_TRIES);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   707
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   708
            eoe->state = ec_eoe_state_rx_start;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   709
        }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   710
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   711
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   712
2094
83e9160319ec Minor: Fixed line wraps and spacing.
Florian Pose <fp@igh-essen.com>
parents: 2045
diff changeset
   713
    if (!ec_mbox_is_datagram_wc(&eoe->mbox, 1)) {
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   714
        if (eoe->tries) {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   715
            eoe->tries--; // try again
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   716
            eoe->queue_datagram = 1;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   717
        } else {
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   718
            eoe->stats.tx_errors++;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   719
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   720
            EC_SLAVE_WARN(eoe->slave, "No sending response"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   721
                    " for %s after %u tries.\n",
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   722
                    eoe->dev->name, EC_EOE_TRIES);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   723
#endif
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   724
            eoe->state = ec_eoe_state_rx_start;
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   725
        }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   726
        return;
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
    // frame completely sent
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   730
    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
   731
        eoe->stats.tx_packets++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   732
        eoe->stats.tx_bytes += eoe->tx_frame->skb->len;
336
360e5287c888 EoE rate statistics.
Florian Pose <fp@igh-essen.com>
parents: 325
diff changeset
   733
        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
   734
        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
   735
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   736
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   737
        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
   738
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   739
    else { // send next fragment
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   740
        if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   741
            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
   742
            kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   743
            eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   744
            eoe->stats.tx_errors++;
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   745
#if EOE_DEBUG_LEVEL >= 1
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   746
            EC_SLAVE_WARN(eoe->slave, "Send error at %s.\n", eoe->dev->name);
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   747
#endif
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   748
            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
   749
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   750
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   751
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   752
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   753
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   754
 *  NET_DEVICE functions
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   755
 *****************************************************************************/
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   756
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   757
/** Opens the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   758
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   759
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
   760
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   761
    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
   762
    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
   763
    eoe->opened = 1;
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   764
    eoe->rx_idle = 0;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   765
    eoe->tx_idle = 0;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   766
    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
   767
    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
   768
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   769
    EC_SLAVE_DBG(eoe->slave, 0, "%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
   770
#endif
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   771
    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
   772
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   773
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   774
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   775
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   776
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   777
/** Stops the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   778
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   779
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
   780
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   781
    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
   782
    netif_stop_queue(dev);
1489
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   783
    eoe->rx_idle = 1;
f77a1182b6f4 EoE processing with kthread.
Florian Pose <fp@igh-essen.com>
parents: 1488
diff changeset
   784
    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
   785
    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
   786
    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
   787
    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
   788
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   789
    EC_SLAVE_DBG(eoe->slave, 0, "%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
   790
#endif
689
880b556a6efc Removed checking for NULL slave pointer in EoE handler; added comments.
Florian Pose <fp@igh-essen.com>
parents: 683
diff changeset
   791
    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
   792
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   793
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   794
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   795
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   796
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   797
/** Transmits data via the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   798
 */
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   799
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
   800
                 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
   801
                )
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   802
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   803
    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
   804
    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
   805
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   806
#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
   807
    if (skb->len > eoe->slave->configured_tx_mailbox_size - 10) {
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   808
        EC_SLAVE_WARN(eoe->slave, "EoE TX frame (%u octets)"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   809
                " 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
   810
        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
   811
        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
   812
        return 0;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   813
    }
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   814
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   815
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   816
    if (!(frame =
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   817
          (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
   818
        if (printk_ratelimit())
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   819
            EC_SLAVE_WARN(eoe->slave, "EoE TX: low on mem. frame dropped.\n");
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   820
        return 1;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   821
    }
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   822
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   823
    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
   824
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   825
    ec_mutex_lock(&eoe->tx_queue_mutex);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   826
    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
   827
    eoe->tx_queued_frames++;
1485
5ddc3a455059 ethercat eoe command.
Florian Pose <fp@igh-essen.com>
parents: 1484
diff changeset
   828
    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
   829
        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
   830
        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
   831
    }
2028
55854f070c4a use rt_mutex instead of semaphore for mutual exclusion (use --enable-mutex)
Martin Troxler <ch1010277@ch10pc446>
parents: 2020
diff changeset
   832
    ec_mutex_unlock(&eoe->tx_queue_mutex);
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   833
1486
dac749e74956 EoE transmit retry; EoE warnings.
Florian Pose <fp@igh-essen.com>
parents: 1485
diff changeset
   834
#if EOE_DEBUG_LEVEL >= 2
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   835
    EC_SLAVE_DBG(eoe->slave, 0, "EoE %s TX queued frame"
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   836
            " with %u octets (%u frames queued).\n",
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   837
            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
   838
    if (!eoe->tx_queue_active)
1921
d9cf40facbc4 Improved syslog macros.
Florian Pose <fp@igh-essen.com>
parents: 1909
diff changeset
   839
        EC_SLAVE_WARN(eoe->slave, "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
   840
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   841
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   842
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   843
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   844
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   845
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   846
1487
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   847
/** Gets statistics about the virtual network device.
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   848
 */
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   849
struct net_device_stats *ec_eoedev_stats(
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   850
        struct net_device *dev /**< EoE net_device */
1c67e19f24b8 Minor: Changed comment style.
Florian Pose <fp@igh-essen.com>
parents: 1486
diff changeset
   851
        )
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   852
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   853
    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
   854
    return &eoe->stats;
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   855
}
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   856
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   857
/*****************************************************************************/