master/ethernet.c
author Florian Pose <fp@igh-essen.com>
Tue, 25 Jul 2006 10:05:04 +0000
changeset 315 119f967aead8
parent 314 26023e414f5c
child 319 88f2e8c4face
permissions -rw-r--r--
Renamed Sysfs attributes.
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it
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 *  and/or modify it under the terms of the GNU General Public License
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 *  as published by the Free Software Foundation; either version 2 of the
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 *  License, or (at your option) any later version.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be
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 *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  The right to use EtherCAT Technology is granted and comes free of
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 *  charge under condition of compatibility of product made by
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 *  Licensee. People intending to distribute/sell products based on the
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 *  code, have to sign an agreement to guarantee that products using
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 *  software based on IgH EtherCAT master stay compatible with the actual
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 *  EtherCAT specification (which are released themselves as an open
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 *  standard) as the (only) precondition to have the right to use EtherCAT
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 *  Technology, IP and trade marks.
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 *
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 *****************************************************************************/
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/**
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   \file
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   Ethernet-over-EtherCAT (EoE).
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*/
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/*****************************************************************************/
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include "../include/ecrt.h"
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#include "globals.h"
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#include "master.h"
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#include "slave.h"
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#include "mailbox.h"
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#include "ethernet.h"
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/**
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   Defines the debug level of EoE processing
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   0 = No debug messages.
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   1 = Output actions.
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   2 = Output actions and frame data.
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*/
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#define EOE_DEBUG_LEVEL 0
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/*****************************************************************************/
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void ec_eoe_flush(ec_eoe_t *);
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// state functions
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void ec_eoe_state_rx_start(ec_eoe_t *);
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void ec_eoe_state_rx_check(ec_eoe_t *);
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void ec_eoe_state_rx_fetch(ec_eoe_t *);
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void ec_eoe_state_tx_start(ec_eoe_t *);
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void ec_eoe_state_tx_sent(ec_eoe_t *);
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// net_device functions
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int ec_eoedev_open(struct net_device *);
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int ec_eoedev_stop(struct net_device *);
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int ec_eoedev_tx(struct sk_buff *, struct net_device *);
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struct net_device_stats *ec_eoedev_stats(struct net_device *);
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/*****************************************************************************/
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/**
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   EoE constructor.
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   Initializes the EoE handler, creates a net_device and registeres it.
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*/
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int ec_eoe_init(ec_eoe_t *eoe /**< EoE handler */)
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{
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    ec_eoe_t **priv;
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    int result, i;
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    eoe->slave = NULL;
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    ec_datagram_init(&eoe->datagram);
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    eoe->state = ec_eoe_state_rx_start;
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    eoe->opened = 0;
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    eoe->rx_skb = NULL;
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    eoe->rx_expected_fragment = 0;
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    INIT_LIST_HEAD(&eoe->tx_queue);
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    eoe->tx_frame = NULL;
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    eoe->tx_queue_active = 0;
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    eoe->tx_queued_frames = 0;
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    eoe->tx_queue_lock = SPIN_LOCK_UNLOCKED;
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    eoe->tx_frame_number = 0xFF;
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    memset(&eoe->stats, 0, sizeof(struct net_device_stats));
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    if (!(eoe->dev =
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          alloc_netdev(sizeof(ec_eoe_t *), "eoe%d", ether_setup))) {
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        EC_ERR("Unable to allocate net_device for EoE handler!\n");
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        goto out_return;
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    }
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    // initialize net_device
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    eoe->dev->open = ec_eoedev_open;
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    eoe->dev->stop = ec_eoedev_stop;
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    eoe->dev->hard_start_xmit = ec_eoedev_tx;
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    eoe->dev->get_stats = ec_eoedev_stats;
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    for (i = 0; i < ETH_ALEN; i++)
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        eoe->dev->dev_addr[i] = i | (i << 4);
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    // initialize private data
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    priv = netdev_priv(eoe->dev);
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    *priv = eoe;
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    // Usually setting the MTU appropriately makes the upper layers
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    // do the frame fragmenting. In some cases this doesn't work
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    // so the MTU is left on the Ethernet standard value and fragmenting
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    // is done "manually".
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#if 0
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    eoe->dev->mtu = slave->sii_rx_mailbox_size - ETH_HLEN - 10;
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#endif
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   130
203
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diff changeset
   131
    // connect the net_device to the kernel
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diff changeset
   132
    if ((result = register_netdev(eoe->dev))) {
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diff changeset
   133
        EC_ERR("Unable to register net_device: error %i\n", result);
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diff changeset
   134
        goto out_free;
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parents: 199
diff changeset
   135
    }
c1f305e339c6 EoE net_device implementation.
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diff changeset
   136
218
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diff changeset
   137
    // make the last address octet unique
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diff changeset
   138
    eoe->dev->dev_addr[ETH_ALEN - 1] = (uint8_t) eoe->dev->ifindex;
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parents: 217
diff changeset
   139
203
c1f305e339c6 EoE net_device implementation.
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diff changeset
   140
    return 0;
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diff changeset
   141
c1f305e339c6 EoE net_device implementation.
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diff changeset
   142
 out_free:
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diff changeset
   143
    free_netdev(eoe->dev);
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diff changeset
   144
    eoe->dev = NULL;
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parents: 199
diff changeset
   145
 out_return:
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diff changeset
   146
    return -1;
145
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   147
}
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   148
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   149
/*****************************************************************************/
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   150
197
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diff changeset
   151
/**
199
04ecf40fc2e9 Doxygen added interface modules and file documentation.
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diff changeset
   152
   EoE destructor.
218
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   153
   Unregisteres the net_device and frees allocated memory.
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diff changeset
   154
*/
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diff changeset
   155
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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diff changeset
   156
void ec_eoe_clear(ec_eoe_t *eoe /**< EoE handler */)
145
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   157
{
314
26023e414f5c Minor changes.
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diff changeset
   158
    if (eoe->dev) { // TODO: dev never NULL?
203
c1f305e339c6 EoE net_device implementation.
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diff changeset
   159
        unregister_netdev(eoe->dev);
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   160
        free_netdev(eoe->dev);
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diff changeset
   161
    }
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
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parents: 213
diff changeset
   162
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   163
    // empty transmit queue
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   164
    ec_eoe_flush(eoe);
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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parents: 217
diff changeset
   165
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   166
    if (eoe->tx_frame) {
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diff changeset
   167
        dev_kfree_skb(eoe->tx_frame->skb);
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diff changeset
   168
        kfree(eoe->tx_frame);
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diff changeset
   169
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   170
80fb87518f3d EoE: State machine with function pointers, documentation.
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diff changeset
   171
    if (eoe->rx_skb) dev_kfree_skb(eoe->rx_skb);
279
12f48c1cb143 Removed mbox_command out of slave.
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parents: 261
diff changeset
   172
293
14aeb79aa992 Renamed command structure to datagram.
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   173
    ec_datagram_clear(&eoe->datagram);
214
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Florian Pose <fp@igh-essen.com>
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diff changeset
   174
}
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   175
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
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diff changeset
   176
/*****************************************************************************/
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diff changeset
   177
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   178
/**
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
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diff changeset
   179
   Empties the transmit queue.
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diff changeset
   180
*/
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   181
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
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diff changeset
   182
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
   183
{
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   184
    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
   185
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   186
    spin_lock_bh(&eoe->tx_queue_lock);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   187
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   188
    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
   189
        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
   190
        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
   191
        kfree(frame);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   192
    }
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   193
    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
   194
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   195
    spin_unlock_bh(&eoe->tx_queue_lock);
145
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   196
}
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   197
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
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parents:
diff changeset
   198
/*****************************************************************************/
11a82e4fd31b Mailbox-Interface ausgelagert, erster EOE-Ansatz.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   199
197
b9a6e2c22745 GPLv2 License and enhanced Doxygen output.
Florian Pose <fp@igh-essen.com>
parents: 195
diff changeset
   200
/**
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   201
   Sends a frame or the next fragment.
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   202
*/
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   203
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   204
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
   205
{
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   206
    size_t remaining_size, current_size, complete_offset;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   207
    unsigned int last_fragment;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   208
    uint8_t *data;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   209
#if EOE_DEBUG_LEVEL > 1
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   210
    unsigned int i;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   211
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   212
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   213
    remaining_size = eoe->tx_frame->skb->len - eoe->tx_offset;
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   214
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   215
    if (remaining_size <= eoe->slave->sii_tx_mailbox_size - 10) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   216
        current_size = remaining_size;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   217
        last_fragment = 1;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   218
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   219
    else {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   220
        current_size = ((eoe->slave->sii_tx_mailbox_size - 10) / 32) * 32;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   221
        last_fragment = 0;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   222
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   223
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   224
    if (eoe->tx_fragment_number) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   225
        complete_offset = eoe->tx_offset / 32;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   226
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   227
    else {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   228
        complete_offset = remaining_size / 32 + 1;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   229
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   230
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   231
#if EOE_DEBUG_LEVEL > 0
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   232
    EC_DBG("EoE TX sending %sfragment %i with %i octets (%i)."
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   233
           " %i frames queued.\n", last_fragment ? "last " : "",
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   234
           eoe->tx_fragment_number, current_size, complete_offset,
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   235
           eoe->tx_queued_frames);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   236
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   237
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   238
#if EOE_DEBUG_LEVEL > 1
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   239
    EC_DBG("");
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   240
    for (i = 0; i < current_size; i++) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   241
        printk("%02X ", frame->skb->data[eoe->tx_offset + i]);
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   242
        if ((i + 1) % 16 == 0) {
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   243
            printk("\n");
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   244
            EC_DBG("");
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   245
        }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   246
    }
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   247
    printk("\n");
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   248
#endif
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   249
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   250
    if (!(data = ec_slave_mbox_prepare_send(eoe->slave, &eoe->datagram,
279
12f48c1cb143 Removed mbox_command out of slave.
Florian Pose <fp@igh-essen.com>
parents: 261
diff changeset
   251
                                            0x02, current_size + 4)))
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   252
        return -1;
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   253
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   254
    EC_WRITE_U8 (data,     0x00); // eoe fragment req.
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   255
    EC_WRITE_U8 (data + 1, last_fragment);
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   256
    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
   257
                            (complete_offset & 0x3F) << 6 |
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   258
                            (eoe->tx_frame_number & 0x0F) << 12));
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   259
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   260
    memcpy(data + 4, eoe->tx_frame->skb->data + eoe->tx_offset, current_size);
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   261
    ec_master_queue_datagram(eoe->slave->master, &eoe->datagram);
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
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    eoe->tx_offset += current_size;
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    eoe->tx_fragment_number++;
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    return 0;
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}
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/*****************************************************************************/
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/**
199
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   Runs the EoE state machine.
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*/
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251
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void ec_eoe_run(ec_eoe_t *eoe /**< EoE handler */)
218
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{
210
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    if (!eoe->opened) return;
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218
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    // call state function
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    eoe->state(eoe);
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}
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/*****************************************************************************/
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197
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/**
235
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   Returns the state of the device.
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   \return 1 if the device is "up", 0 if it is "down"
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*/
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251
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unsigned int ec_eoe_active(const ec_eoe_t *eoe /**< EoE handler */)
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{
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    return eoe->slave && eoe->opened;
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}
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/*****************************************************************************/
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/**
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   Prints EoE handler information.
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*/
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void ec_eoe_print(const ec_eoe_t *eoe /**< EoE handler */)
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{
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    EC_INFO("  EoE handler %s\n", eoe->dev->name);
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    EC_INFO("    State: %s\n", eoe->opened ? "opened" : "closed");
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    if (eoe->slave)
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        EC_INFO("    Coupled to slave %i.\n", eoe->slave->ring_position);
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    else
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        EC_INFO("    Not coupled.\n");
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}
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218
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/******************************************************************************
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 *  STATE PROCESSING FUNCTIONS
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 *****************************************************************************/
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/**
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   State: RX_START.
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   Starts a new receiving sequence by queueing a datagram that checks the
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   slave's mailbox for a new EoE datagram.
218
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*/
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251
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void ec_eoe_state_rx_start(ec_eoe_t *eoe /**< EoE handler */)
218
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{
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
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    if (!eoe->slave->online || !eoe->slave->master->device->link_state)
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        return;
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   324
293
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    ec_slave_mbox_prepare_check(eoe->slave, &eoe->datagram);
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    ec_master_queue_datagram(eoe->slave->master, &eoe->datagram);
218
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    eoe->state = ec_eoe_state_rx_check;
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   328
}
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/*****************************************************************************/
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/**
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   State: RX_CHECK.
293
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   Processes the checking datagram sent in RX_START and issues a receive
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   335
   datagram, if new data is available.
218
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   336
*/
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   337
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
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   338
void ec_eoe_state_rx_check(ec_eoe_t *eoe /**< EoE handler */)
218
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   339
{
293
14aeb79aa992 Renamed command structure to datagram.
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   340
    if (eoe->datagram.state != EC_CMD_RECEIVED) {
218
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        eoe->stats.rx_errors++;
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        eoe->state = ec_eoe_state_tx_start;
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   343
        return;
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   344
    }
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   345
293
14aeb79aa992 Renamed command structure to datagram.
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   346
    if (!ec_slave_mbox_check(&eoe->datagram)) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
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   347
        eoe->state = ec_eoe_state_tx_start;
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diff changeset
   348
        return;
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diff changeset
   349
    }
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   350
293
14aeb79aa992 Renamed command structure to datagram.
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   351
    ec_slave_mbox_prepare_fetch(eoe->slave, &eoe->datagram);
14aeb79aa992 Renamed command structure to datagram.
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   352
    ec_master_queue_datagram(eoe->slave->master, &eoe->datagram);
218
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   353
    eoe->state = ec_eoe_state_rx_fetch;
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   354
}
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   355
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   356
/*****************************************************************************/
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   357
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   358
/**
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   359
   State: RX_FETCH.
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   360
   Checks if the requested data of RX_CHECK was received and processes the
293
14aeb79aa992 Renamed command structure to datagram.
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   361
   EoE datagram.
218
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   362
*/
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   363
251
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   364
void ec_eoe_state_rx_fetch(ec_eoe_t *eoe /**< EoE handler */)
218
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   365
{
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   366
    size_t rec_size, data_size;
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   367
    uint8_t *data, frame_type, last_fragment, time_appended;
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   368
    uint8_t frame_number, fragment_offset, fragment_number;
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   369
    off_t offset;
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   370
293
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   371
    if (eoe->datagram.state != EC_CMD_RECEIVED) {
218
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   372
        eoe->stats.rx_errors++;
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   373
        eoe->state = ec_eoe_state_tx_start;
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   374
        return;
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diff changeset
   375
    }
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   376
293
14aeb79aa992 Renamed command structure to datagram.
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diff changeset
   377
    if (!(data = ec_slave_mbox_fetch(eoe->slave, &eoe->datagram,
279
12f48c1cb143 Removed mbox_command out of slave.
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diff changeset
   378
                                     0x02, &rec_size))) {
218
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diff changeset
   379
        eoe->stats.rx_errors++;
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diff changeset
   380
        eoe->state = ec_eoe_state_tx_start;
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diff changeset
   381
        return;
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diff changeset
   382
    }
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   383
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   384
    frame_type = EC_READ_U16(data) & 0x000F;
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diff changeset
   385
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diff changeset
   386
    if (frame_type == 0x00) { // EoE Fragment Request
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diff changeset
   387
        last_fragment = (EC_READ_U16(data) >> 8) & 0x0001;
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diff changeset
   388
        time_appended = (EC_READ_U16(data) >> 9) & 0x0001;
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diff changeset
   389
        fragment_number = EC_READ_U16(data + 2) & 0x003F;
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parents: 217
diff changeset
   390
        fragment_offset = (EC_READ_U16(data + 2) >> 6) & 0x003F;
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diff changeset
   391
        frame_number = (EC_READ_U16(data + 2) >> 12) & 0x000F;
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diff changeset
   392
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diff changeset
   393
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   394
        EC_DBG("EoE RX fragment %i, offset %i, frame %i%s%s,"
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   395
               " %i octets\n", fragment_number, fragment_offset,
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   396
               frame_number,
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   397
               last_fragment ? ", last fragment" : "",
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   398
               time_appended ? ", + timestamp" : "",
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   399
               time_appended ? rec_size - 8 : rec_size - 4);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   400
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   401
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   402
#if EOE_DEBUG_LEVEL > 1
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   403
        EC_DBG("");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   404
        for (i = 0; i < rec_size - 4; i++) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   405
            printk("%02X ", data[i + 4]);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   406
            if ((i + 1) % 16 == 0) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   407
                printk("\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   408
                EC_DBG("");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   409
            }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   410
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   411
        printk("\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   412
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   413
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   414
        data_size = time_appended ? rec_size - 8 : rec_size - 4;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   415
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   416
        if (!fragment_number) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   417
            if (eoe->rx_skb) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   418
                EC_WARN("EoE RX freeing old socket buffer...\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   419
                dev_kfree_skb(eoe->rx_skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   420
            }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   421
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   422
            // new socket buffer
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   423
            if (!(eoe->rx_skb = dev_alloc_skb(fragment_offset * 32))) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   424
                if (printk_ratelimit())
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   425
                    EC_WARN("EoE RX low on mem. frame dropped.\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   426
                eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   427
                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
   428
                return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   429
            }
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
            eoe->rx_skb_offset = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   432
            eoe->rx_skb_size = fragment_offset * 32;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   433
            eoe->rx_expected_fragment = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   434
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   435
        else {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   436
            if (!eoe->rx_skb) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   437
                eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   438
                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
   439
                return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   440
            }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   441
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   442
            offset = fragment_offset * 32;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   443
            if (offset != eoe->rx_skb_offset ||
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   444
                offset + data_size > eoe->rx_skb_size ||
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   445
                fragment_number != eoe->rx_expected_fragment) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   446
                eoe->stats.rx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   447
                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
   448
                dev_kfree_skb(eoe->rx_skb);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   449
                eoe->rx_skb = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   450
                return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   451
            }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   452
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   453
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   454
        // copy fragment into socket buffer
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   455
        memcpy(skb_put(eoe->rx_skb, data_size), data + 4, data_size);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   456
        eoe->rx_skb_offset += data_size;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   457
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   458
        if (last_fragment) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   459
            // update statistics
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   460
            eoe->stats.rx_packets++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   461
            eoe->stats.rx_bytes += eoe->rx_skb->len;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   462
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   463
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   464
            EC_DBG("EoE RX frame completed with %u octets.\n",
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   465
                   eoe->rx_skb->len);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   466
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   467
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   468
            // pass socket buffer to network stack
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   469
            eoe->rx_skb->dev = eoe->dev;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   470
            eoe->rx_skb->protocol = eth_type_trans(eoe->rx_skb, eoe->dev);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   471
            eoe->rx_skb->ip_summed = CHECKSUM_UNNECESSARY;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   472
            if (netif_rx(eoe->rx_skb)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   473
                EC_WARN("EoE RX netif_rx failed.\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   474
            }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   475
            eoe->rx_skb = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   476
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   477
            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
   478
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   479
        else {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   480
            eoe->rx_expected_fragment++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   481
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   482
            EC_DBG("EoE RX expecting fragment %i\n",
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   483
                   eoe->rx_expected_fragment);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   484
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   485
            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
   486
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   487
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   488
    else {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   489
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   490
        EC_DBG("other frame received.\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   491
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   492
        eoe->stats.rx_dropped++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   493
        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
   494
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   495
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   496
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   497
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   498
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   499
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   500
   State: TX START.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   501
   Starts a new transmit sequence. If no data is available, a new receive
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   502
   sequence is started instead.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   503
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   504
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   505
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
   506
{
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   507
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   508
    unsigned int wakeup;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   509
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   510
261
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   511
    if (!eoe->slave->online || !eoe->slave->master->device->link_state)
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   512
        return;
44a3a5833c49 Better state-dependent behaviour for EoE-capable slaves.
Florian Pose <fp@igh-essen.com>
parents: 251
diff changeset
   513
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   514
    spin_lock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   515
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   516
    if (!eoe->tx_queued_frames || list_empty(&eoe->tx_queue)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   517
        spin_unlock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   518
        // no data available.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   519
        // start a new receive immediately.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   520
        ec_eoe_state_rx_start(eoe);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   521
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   522
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   523
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   524
    // 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
   525
    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
   526
    list_del(&eoe->tx_frame->queue);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   527
    if (!eoe->tx_queue_active &&
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   528
        eoe->tx_queued_frames == EC_EOE_TX_QUEUE_SIZE / 2) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   529
        netif_wake_queue(eoe->dev);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   530
        eoe->tx_queue_active = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   531
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   532
        wakeup = 1;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   533
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   534
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   535
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   536
    eoe->tx_queued_frames--;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   537
    spin_unlock_bh(&eoe->tx_queue_lock);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   538
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   539
    eoe->tx_frame_number++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   540
    eoe->tx_frame_number %= 16;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   541
    eoe->tx_fragment_number = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   542
    eoe->tx_offset = 0;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   543
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   544
    if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   545
        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
   546
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   547
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   548
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   549
        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
   550
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   551
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   552
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   553
#if EOE_DEBUG_LEVEL > 0
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   554
    if (wakeup) EC_DBG("waking up TX queue...\n");
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   555
#endif
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   556
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   557
    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
   558
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   559
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   560
/*****************************************************************************/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   561
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   562
/**
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   563
   State: TX SENT.
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   564
   Checks is the previous transmit datagram succeded and sends the next
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   565
   fragment, if necessary.
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   566
*/
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   567
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   568
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
   569
{
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   570
    if (eoe->datagram.state != EC_CMD_RECEIVED) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   571
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   572
        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
   573
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   574
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   575
293
14aeb79aa992 Renamed command structure to datagram.
Florian Pose <fp@igh-essen.com>
parents: 291
diff changeset
   576
    if (eoe->datagram.working_counter != 1) {
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   577
        eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   578
        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
   579
        return;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   580
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   581
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   582
    // frame completely sent
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   583
    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
   584
        eoe->stats.tx_packets++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   585
        eoe->stats.tx_bytes += eoe->tx_frame->skb->len;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   586
        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
   587
        kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   588
        eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   589
        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
   590
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   591
    else { // send next fragment
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   592
        if (ec_eoe_send(eoe)) {
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   593
            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
   594
            kfree(eoe->tx_frame);
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   595
            eoe->tx_frame = NULL;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   596
            eoe->stats.tx_errors++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   597
            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
   598
        }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   599
    }
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   600
}
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   601
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   602
/******************************************************************************
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   603
 *  NET_DEVICE functions
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   604
 *****************************************************************************/
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   605
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   606
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   607
   Opens the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   608
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   609
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   610
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
   611
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   612
    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
   613
    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
   614
    eoe->opened = 1;
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   615
    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
   616
    eoe->tx_queue_active = 1;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   617
    EC_INFO("%s opened.\n", dev->name);
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   618
    if (!eoe->slave)
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   619
        EC_WARN("device %s is not coupled to any EoE slave!\n", dev->name);
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   620
    else {
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   621
        eoe->slave->requested_state = EC_SLAVE_STATE_OP;
291
0b1f877cf3f1 Slave: state_error -> error_flag, error_flag only in slave state machine.
Florian Pose <fp@igh-essen.com>
parents: 286
diff changeset
   622
        eoe->slave->error_flag = 0;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   623
    }
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   624
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   625
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   626
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   627
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   628
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   629
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   630
   Stops the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   631
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   632
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   633
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
   634
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   635
    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
   636
    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
   637
    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
   638
    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
   639
    ec_eoe_flush(eoe);
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   640
    EC_INFO("%s stopped.\n", dev->name);
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   641
    if (!eoe->slave)
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   642
        EC_WARN("device %s is not coupled to any EoE slave!\n", dev->name);
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   643
    else {
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   644
        eoe->slave->requested_state = EC_SLAVE_STATE_INIT;
291
0b1f877cf3f1 Slave: state_error -> error_flag, error_flag only in slave state machine.
Florian Pose <fp@igh-essen.com>
parents: 286
diff changeset
   645
        eoe->slave->error_flag = 0;
251
c1d0b63a9302 EoE in Free-Run mode; Finished slave configuration state machine.
Florian Pose <fp@igh-essen.com>
parents: 246
diff changeset
   646
    }
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   647
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   648
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   649
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   650
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   651
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   652
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   653
   Transmits data via the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   654
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   655
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   656
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
   657
                 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
   658
                )
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   659
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   660
    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
   661
    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
   662
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   663
#if 0
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   664
    if (skb->len > eoe->slave->sii_tx_mailbox_size - 10) {
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   665
        EC_WARN("EoE TX frame (%i octets) exceeds MTU. dropping.\n", skb->len);
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   666
        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
   667
        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
   668
        return 0;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   669
    }
217
dcfd406e7786 EoE - TX fragmenting works. TCP traffic possible.
Florian Pose <fp@igh-essen.com>
parents: 216
diff changeset
   670
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   671
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   672
    if (!(frame =
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   673
          (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
   674
        if (printk_ratelimit())
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   675
            EC_WARN("EoE TX: low on mem. frame dropped.\n");
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   676
        return 1;
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   677
    }
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   678
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   679
    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
   680
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   681
    spin_lock_bh(&eoe->tx_queue_lock);
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   682
    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
   683
    eoe->tx_queued_frames++;
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   684
    if (eoe->tx_queued_frames == EC_EOE_TX_QUEUE_SIZE) {
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   685
        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
   686
        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
   687
    }
212
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   688
    spin_unlock_bh(&eoe->tx_queue_lock);
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   689
215
b021aa6eee38 EoE: TCP traffic possible; TX fragmenting to do.
Florian Pose <fp@igh-essen.com>
parents: 214
diff changeset
   690
#if EOE_DEBUG_LEVEL > 0
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   691
    EC_DBG("EoE TX queued frame with %i octets (%i frames queued).\n",
218
80fb87518f3d EoE: State machine with function pointers, documentation.
Florian Pose <fp@igh-essen.com>
parents: 217
diff changeset
   692
           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
   693
    if (!eoe->tx_queue_active)
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   694
        EC_WARN("EoE TX queue is now full.\n");
215
b021aa6eee38 EoE: TCP traffic possible; TX fragmenting to do.
Florian Pose <fp@igh-essen.com>
parents: 214
diff changeset
   695
#endif
214
8beb86af5ed0 EoE frame queuing, receiving of fragmented frames; no TCP possible yet.
Florian Pose <fp@igh-essen.com>
parents: 213
diff changeset
   696
203
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   697
    return 0;
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   698
}
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   699
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   700
/*****************************************************************************/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   701
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   702
/**
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   703
   Gets statistics about the virtual network device.
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   704
*/
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   705
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   706
struct net_device_stats *ec_eoedev_stats(struct net_device *dev
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   707
                                         /**< EoE net_device */)
c1f305e339c6 EoE net_device implementation.
Florian Pose <fp@igh-essen.com>
parents: 199
diff changeset
   708
{
213
8d723b9833a9 removed unnecessary private structure in eoe net_device.
Florian Pose <fp@igh-essen.com>
parents: 212
diff changeset
   709
    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
   710
    return &eoe->stats;
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   711
}
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   712
82980deb8b00 moved stats into eoe struct; persistent rx-skb; tx queue.
Florian Pose <fp@igh-essen.com>
parents: 210
diff changeset
   713
/*****************************************************************************/