devices/generic.c
author Florian Pose <fp@igh-essen.com>
Fri, 16 Sep 2016 11:57:01 +0200
branchstable-1.5
changeset 2657 bb2163e6b145
parent 2631 827abf3c50de
child 2660 161c675135f0
permissions -rw-r--r--
merge
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/******************************************************************************
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 *
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 *  $Id$
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 *
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 *  Copyright (C) 2006-2008  Florian Pose, Ingenieurgemeinschaft IgH
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 *
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 *  This file is part of the IgH EtherCAT Master.
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 *
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 *  The IgH EtherCAT Master is free software; you can redistribute it and/or
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 *  modify it under the terms of the GNU General Public License version 2, as
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 *  published by the Free Software Foundation.
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 *
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 *  The IgH EtherCAT Master is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 *  Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License along
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 *  with the IgH EtherCAT Master; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 *  ---
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 *
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 *  The license mentioned above concerns the source code only. Using the
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 *  EtherCAT technology and brand is only permitted in compliance with the
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 *  industrial property and similar rights of Beckhoff Automation GmbH.
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 *
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 *****************************************************************************/
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/** \file
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 * EtherCAT generic Ethernet device module.
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 */
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/*****************************************************************************/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/version.h>
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#include <linux/if_arp.h> /* ARPHRD_ETHER */
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#include <linux/etherdevice.h>
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#include "../globals.h"
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#include "ecdev.h"
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#define PFX "ec_generic: "
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#define ETH_P_ETHERCAT 0x88A4
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#define EC_GEN_RX_BUF_SIZE 1600
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/*****************************************************************************/
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int __init ec_gen_init_module(void);
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void __exit ec_gen_cleanup_module(void);
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/*****************************************************************************/
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/** \cond */
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MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");
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MODULE_DESCRIPTION("EtherCAT master generic Ethernet device module");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(EC_MASTER_VERSION);
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/** \endcond */
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struct list_head generic_devices;
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typedef struct {
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    struct list_head list;
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    struct net_device *netdev;
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    struct net_device *used_netdev;
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    struct socket *socket;
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    ec_device_t *ecdev;
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    uint8_t *rx_buf;
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} ec_gen_device_t;
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typedef struct {
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    struct list_head list;
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    struct net_device *netdev;
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    char name[IFNAMSIZ];
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    int ifindex;
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    uint8_t dev_addr[ETH_ALEN];
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} ec_gen_interface_desc_t;
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int ec_gen_device_open(ec_gen_device_t *);
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int ec_gen_device_stop(ec_gen_device_t *);
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int ec_gen_device_start_xmit(ec_gen_device_t *, struct sk_buff *);
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void ec_gen_device_poll(ec_gen_device_t *);
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/*****************************************************************************/
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static int ec_gen_netdev_open(struct net_device *dev)
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{
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    ec_gen_device_t *gendev = *((ec_gen_device_t **) netdev_priv(dev));
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    return ec_gen_device_open(gendev);
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}
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/*****************************************************************************/
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static int ec_gen_netdev_stop(struct net_device *dev)
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{
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    ec_gen_device_t *gendev = *((ec_gen_device_t **) netdev_priv(dev));
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    return ec_gen_device_stop(gendev);
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}
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/*****************************************************************************/
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static int ec_gen_netdev_start_xmit(
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        struct sk_buff *skb,
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        struct net_device *dev
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        )
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{
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    ec_gen_device_t *gendev = *((ec_gen_device_t **) netdev_priv(dev));
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    return ec_gen_device_start_xmit(gendev, skb);
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}
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/*****************************************************************************/
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void ec_gen_poll(struct net_device *dev)
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{
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    ec_gen_device_t *gendev = *((ec_gen_device_t **) netdev_priv(dev));
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    ec_gen_device_poll(gendev);
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}
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/*****************************************************************************/
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
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static const struct net_device_ops ec_gen_netdev_ops = {
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    .ndo_open       = ec_gen_netdev_open,
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    .ndo_stop       = ec_gen_netdev_stop,
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    .ndo_start_xmit = ec_gen_netdev_start_xmit,
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};
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#endif
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/*****************************************************************************/
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/** Init generic device.
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 */
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int ec_gen_device_init(
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        ec_gen_device_t *dev
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        )
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{
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    ec_gen_device_t **priv;
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    char null = 0x00;
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    dev->ecdev = NULL;
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    dev->socket = NULL;
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    dev->rx_buf = NULL;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
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    dev->netdev = alloc_netdev(sizeof(ec_gen_device_t *), &null,
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            NET_NAME_UNKNOWN, ether_setup);
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#else
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    dev->netdev = alloc_netdev(sizeof(ec_gen_device_t *), &null, ether_setup);
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#endif
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    if (!dev->netdev) {
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        return -ENOMEM;
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    }
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 29)
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    dev->netdev->netdev_ops = &ec_gen_netdev_ops;
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#else
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    dev->netdev->open = ec_gen_netdev_open;
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    dev->netdev->stop = ec_gen_netdev_stop;
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    dev->netdev->hard_start_xmit = ec_gen_netdev_start_xmit;
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#endif
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    priv = netdev_priv(dev->netdev);
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    *priv = dev;
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    return 0;
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   174
}
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/*****************************************************************************/
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/** Clear generic device.
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 */
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void ec_gen_device_clear(
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        ec_gen_device_t *dev
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        )
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{
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    if (dev->ecdev) {
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        ecdev_close(dev->ecdev);
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        ecdev_withdraw(dev->ecdev);
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    }
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    if (dev->socket) {
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        sock_release(dev->socket);
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   190
    }
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    free_netdev(dev->netdev);
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   193
    if (dev->rx_buf) {
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        kfree(dev->rx_buf);
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    }
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}
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/*****************************************************************************/
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/** Creates a network socket.
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 */
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int ec_gen_device_create_socket(
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        ec_gen_device_t *dev,
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        ec_gen_interface_desc_t *desc
1541
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        )
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{
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    int ret;
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    struct sockaddr_ll sa;
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    dev->rx_buf = kmalloc(EC_GEN_RX_BUF_SIZE, GFP_KERNEL);
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   211
    if (!dev->rx_buf) {
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   212
        return -ENOMEM;
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   213
    }
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    ret = sock_create_kern(PF_PACKET, SOCK_RAW, htons(ETH_P_ETHERCAT),
e69a5010914f Improved generic driver error messages.
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            &dev->socket);
1541
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    if (ret) {
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        printk(KERN_ERR PFX "Failed to create socket (ret = %i).\n", ret);
1541
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   219
        return ret;
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   220
    }
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    printk(KERN_ERR PFX "Binding socket to interface %i (%s).\n",
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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   223
            desc->ifindex, desc->name);
1541
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   224
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    memset(&sa, 0x00, sizeof(sa));
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   226
    sa.sll_family = AF_PACKET;
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   227
    sa.sll_protocol = htons(ETH_P_ETHERCAT);
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daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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   228
    sa.sll_ifindex = desc->ifindex;
1541
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   229
    ret = kernel_bind(dev->socket, (struct sockaddr *) &sa, sizeof(sa));
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   230
    if (ret) {
2170
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diff changeset
   231
        printk(KERN_ERR PFX "Failed to bind() socket to interface"
e69a5010914f Improved generic driver error messages.
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diff changeset
   232
                " (ret = %i).\n", ret);
1541
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   233
        sock_release(dev->socket);
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diff changeset
   234
        dev->socket = NULL;
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diff changeset
   235
        return ret;
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diff changeset
   236
    }
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   237
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   238
    return 0;
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   239
}
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   240
26ac1c611100 Sending via generic device works.
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   241
/*****************************************************************************/
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   242
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49430a3fe73d Basic generic Ethernet device module.
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/** Offer generic device to master.
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   244
 */
49430a3fe73d Basic generic Ethernet device module.
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   245
int ec_gen_device_offer(
1541
26ac1c611100 Sending via generic device works.
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diff changeset
   246
        ec_gen_device_t *dev,
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   247
        ec_gen_interface_desc_t *desc
1540
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   248
        )
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   249
{
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   250
    int ret = 0;
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   251
1612
c6779ebcda88 Removed tabulators.
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   252
    dev->used_netdev = desc->netdev;
c6779ebcda88 Removed tabulators.
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diff changeset
   253
    memcpy(dev->netdev->dev_addr, desc->dev_addr, ETH_ALEN);
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   254
1555
7679e98b0bb1 Generic driver net_device_ops for kernels < 2.6.29.
Florian Pose <fp@igh-essen.com>
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diff changeset
   255
    dev->ecdev = ecdev_offer(dev->netdev, ec_gen_poll, THIS_MODULE);
1540
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   256
    if (dev->ecdev) {
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   257
        if (ec_gen_device_create_socket(dev, desc)) {
1541
26ac1c611100 Sending via generic device works.
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diff changeset
   258
            ecdev_withdraw(dev->ecdev);
26ac1c611100 Sending via generic device works.
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diff changeset
   259
            dev->ecdev = NULL;
26ac1c611100 Sending via generic device works.
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diff changeset
   260
        } else if (ecdev_open(dev->ecdev)) {
1540
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   261
            ecdev_withdraw(dev->ecdev);
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   262
            dev->ecdev = NULL;
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   263
        } else {
1612
c6779ebcda88 Removed tabulators.
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parents: 1607
diff changeset
   264
            ecdev_set_link(dev->ecdev, netif_carrier_ok(dev->used_netdev)); // FIXME
1540
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   265
            ret = 1;
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   266
        }
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   267
    }
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   268
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   269
    return ret;
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diff changeset
   270
}
49430a3fe73d Basic generic Ethernet device module.
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   271
49430a3fe73d Basic generic Ethernet device module.
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   272
/*****************************************************************************/
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   273
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   274
/** Open the device.
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   275
 */
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   276
int ec_gen_device_open(
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   277
        ec_gen_device_t *dev
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   278
        )
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   279
{
1541
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   280
    return 0;
1540
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   281
}
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   282
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   283
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   284
49430a3fe73d Basic generic Ethernet device module.
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diff changeset
   285
/** Stop the device.
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   286
 */
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   287
int ec_gen_device_stop(
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   288
        ec_gen_device_t *dev
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   289
        )
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   290
{
1541
26ac1c611100 Sending via generic device works.
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   291
    return 0;
1540
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   292
}
49430a3fe73d Basic generic Ethernet device module.
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parents:
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   293
49430a3fe73d Basic generic Ethernet device module.
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parents:
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   294
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
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parents:
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   295
49430a3fe73d Basic generic Ethernet device module.
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parents:
diff changeset
   296
int ec_gen_device_start_xmit(
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   297
        ec_gen_device_t *dev,
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   298
        struct sk_buff *skb
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   299
        )
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   300
{
1541
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   301
    struct msghdr msg;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   302
    struct kvec iov;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   303
    size_t len = skb->len;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   304
    int ret;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   305
1612
c6779ebcda88 Removed tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1607
diff changeset
   306
    ecdev_set_link(dev->ecdev, netif_carrier_ok(dev->used_netdev));
1607
be4dd9c80f42 generic device driver checks link up/down
Martin Troxler <martin.troxler@komaxgroup.com>
parents: 1559
diff changeset
   307
1541
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   308
    iov.iov_base = skb->data;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   309
    iov.iov_len = len;
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   310
    memset(&msg, 0, sizeof(msg));
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   311
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   312
    ret = kernel_sendmsg(dev->socket, &msg, &iov, 1, len);
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   313
26ac1c611100 Sending via generic device works.
Florian Pose <fp@igh-essen.com>
parents: 1540
diff changeset
   314
    return ret == len ? NETDEV_TX_OK : NETDEV_TX_BUSY;
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   315
}
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   316
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   317
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   318
1542
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   319
/** Polls the device.
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   320
 */
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   321
void ec_gen_device_poll(
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   322
        ec_gen_device_t *dev
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   323
        )
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   324
{
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   325
    struct msghdr msg;
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   326
    struct kvec iov;
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   327
    int ret, budget = 10; // FIXME
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   328
1612
c6779ebcda88 Removed tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1607
diff changeset
   329
    ecdev_set_link(dev->ecdev, netif_carrier_ok(dev->used_netdev));
c6779ebcda88 Removed tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1607
diff changeset
   330
c6779ebcda88 Removed tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1607
diff changeset
   331
    do {
1559
1b3a89f6dc29 Fixed receiving multiple frames in generic device.
Florian Pose <fp@igh-essen.com>
parents: 1558
diff changeset
   332
        iov.iov_base = dev->rx_buf;
1b3a89f6dc29 Fixed receiving multiple frames in generic device.
Florian Pose <fp@igh-essen.com>
parents: 1558
diff changeset
   333
        iov.iov_len = EC_GEN_RX_BUF_SIZE;
1b3a89f6dc29 Fixed receiving multiple frames in generic device.
Florian Pose <fp@igh-essen.com>
parents: 1558
diff changeset
   334
        memset(&msg, 0, sizeof(msg));
1b3a89f6dc29 Fixed receiving multiple frames in generic device.
Florian Pose <fp@igh-essen.com>
parents: 1558
diff changeset
   335
1542
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   336
        ret = kernel_recvmsg(dev->socket, &msg, &iov, 1, iov.iov_len,
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   337
                MSG_DONTWAIT);
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   338
        if (ret > 0) {
1558
55213fcc93a6 generic device receive buffer in heap.
Florian Pose <fp@igh-essen.com>
parents: 1557
diff changeset
   339
            ecdev_receive(dev->ecdev, dev->rx_buf, ret);
1542
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   340
        } else if (ret < 0) {
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   341
            break;
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   342
        }
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   343
        budget--;
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   344
    } while (budget);
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   345
}
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   346
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   347
/*****************************************************************************/
91ae9c95dd2e Implemented poll(); receiving on generic device also works.
Florian Pose <fp@igh-essen.com>
parents: 1541
diff changeset
   348
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   349
/** Offer device.
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   350
 */
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   351
int offer_device(
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   352
        ec_gen_interface_desc_t *desc
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   353
        )
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   354
{
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   355
    ec_gen_device_t *gendev;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   356
    int ret = 0;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   357
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   358
    gendev = kmalloc(sizeof(ec_gen_device_t), GFP_KERNEL);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   359
    if (!gendev) {
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   360
        return -ENOMEM;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   361
    }
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   362
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   363
    ret = ec_gen_device_init(gendev);
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   364
    if (ret) {
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   365
        kfree(gendev);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   366
        return ret;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   367
    }
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   368
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   369
    if (ec_gen_device_offer(gendev, desc)) {
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   370
        list_add_tail(&gendev->list, &generic_devices);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   371
    } else {
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   372
        ec_gen_device_clear(gendev);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   373
        kfree(gendev);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   374
    }
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   375
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   376
    return ret;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   377
}
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   378
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   379
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   380
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   381
/** Clear devices.
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   382
 */
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   383
void clear_devices(void)
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   384
{
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   385
    ec_gen_device_t *gendev, *next;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   386
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   387
    list_for_each_entry_safe(gendev, next, &generic_devices, list) {
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   388
        list_del(&gendev->list);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   389
        ec_gen_device_clear(gendev);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   390
        kfree(gendev);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   391
    }
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   392
}
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   393
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   394
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   395
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   396
/** Module initialization.
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   397
 *
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   398
 * Initializes \a master_count masters.
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   399
 * \return 0 on success, else < 0
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   400
 */
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   401
int __init ec_gen_init_module(void)
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   402
{
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   403
    int ret = 0;
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   404
    struct list_head descs;
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   405
    struct net_device *netdev;
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   406
    ec_gen_interface_desc_t *desc, *next;
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   407
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   408
    printk(KERN_INFO PFX "EtherCAT master generic Ethernet device module %s\n",
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   409
            EC_MASTER_VERSION);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   410
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   411
    INIT_LIST_HEAD(&generic_devices);
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   412
    INIT_LIST_HEAD(&descs);
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   413
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   414
    read_lock(&dev_base_lock);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   415
    for_each_netdev(&init_net, netdev) {
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   416
        if (netdev->type != ARPHRD_ETHER)
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   417
            continue;
1833
5adbf2bc48d9 Fixed memory allocation while lock is held. Thanks to Esben Haabendal.
Florian Pose <fp@igh-essen.com>
parents: 1612
diff changeset
   418
        desc = kmalloc(sizeof(ec_gen_interface_desc_t), GFP_ATOMIC);
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   419
        if (!desc) {
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   420
            ret = -ENOMEM;
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   421
            read_unlock(&dev_base_lock);
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   422
            goto out_err;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   423
        }
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   424
        strncpy(desc->name, netdev->name, IFNAMSIZ);
1612
c6779ebcda88 Removed tabulators.
Florian Pose <fp@igh-essen.com>
parents: 1607
diff changeset
   425
        desc->netdev = netdev;
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   426
        desc->ifindex = netdev->ifindex;
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   427
        memcpy(desc->dev_addr, netdev->dev_addr, ETH_ALEN);
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   428
        list_add_tail(&desc->list, &descs);
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   429
    }
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   430
    read_unlock(&dev_base_lock);
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   431
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   432
    list_for_each_entry_safe(desc, next, &descs, list) {
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   433
        ret = offer_device(desc);
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   434
        if (ret) {
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   435
            goto out_err;
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   436
        }
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   437
        kfree(desc);
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
Florian Pose <fp@igh-essen.com>
parents: 1555
diff changeset
   438
    }
1540
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   439
    return ret;
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   440
49430a3fe73d Basic generic Ethernet device module.
Florian Pose <fp@igh-essen.com>
parents:
diff changeset
   441
out_err:
1557
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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    list_for_each_entry_safe(desc, next, &descs, list) {
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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   443
        list_del(&desc->list);
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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   444
        kfree(desc);
daf92232d9c5 Fixed bug in generic driver failing to create debug interfaces, because the
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   445
    }
1540
49430a3fe73d Basic generic Ethernet device module.
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    clear_devices();
49430a3fe73d Basic generic Ethernet device module.
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   447
    return ret;
49430a3fe73d Basic generic Ethernet device module.
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   448
}
49430a3fe73d Basic generic Ethernet device module.
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   449
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/*****************************************************************************/
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   451
49430a3fe73d Basic generic Ethernet device module.
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   452
/** Module cleanup.
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   453
 *
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   454
 * Clears all master instances.
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   455
 */
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   456
void __exit ec_gen_cleanup_module(void)
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   457
{
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   458
    clear_devices();
49430a3fe73d Basic generic Ethernet device module.
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   459
    printk(KERN_INFO PFX "Unloading.\n");
49430a3fe73d Basic generic Ethernet device module.
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   460
}
49430a3fe73d Basic generic Ethernet device module.
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   461
49430a3fe73d Basic generic Ethernet device module.
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   462
/*****************************************************************************/
49430a3fe73d Basic generic Ethernet device module.
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   463
49430a3fe73d Basic generic Ethernet device module.
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   464
/** \cond */
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   465
49430a3fe73d Basic generic Ethernet device module.
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   466
module_init(ec_gen_init_module);
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   467
module_exit(ec_gen_cleanup_module);
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   468
49430a3fe73d Basic generic Ethernet device module.
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   469
/** \endcond */
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   470
49430a3fe73d Basic generic Ethernet device module.
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   471
/*****************************************************************************/