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ethercat
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EoE net_device implementation.

This commit is contained in:
Florian Pose 2006-04-25 11:39:33 +00:00
parent fc5d0edb91
commit ba806d5094
3 changed files with 142 additions and 3 deletions
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136
master/ethernet.c
View File

@ -37,14 +37,62 @@
/*****************************************************************************/
/**
Contains the private data of an EoE net_device.
*/
typedef struct
{
struct net_device_stats stats; /**< device statistics */
ec_eoe_t *eoe; /**< pointer to parent eoe object */
}
ec_eoedev_priv_t;
/*****************************************************************************/
void ec_eoedev_init(struct net_device *);
int ec_eoedev_open(struct net_device *);
int ec_eoedev_stop(struct net_device *);
int ec_eoedev_tx(struct sk_buff *, struct net_device *);
struct net_device_stats *ec_eoedev_stats(struct net_device *);
/*****************************************************************************/
/**
EoE constructor.
*/
void ec_eoe_init(ec_eoe_t *eoe, ec_slave_t *slave)
int ec_eoe_init(ec_eoe_t *eoe, ec_slave_t *slave)
{
ec_eoedev_priv_t *priv;
int result;
eoe->slave = slave;
eoe->rx_state = EC_EOE_IDLE;
if (!(eoe->dev =
alloc_netdev(sizeof(ec_eoedev_priv_t), "eoe%d", ec_eoedev_init))) {
EC_ERR("Unable to allocate net_device for EoE object!\n");
goto out_return;
}
// set EoE object reference
priv = netdev_priv(eoe->dev);
priv->eoe = eoe;
// connect the net_device to the kernel
if ((result = register_netdev(eoe->dev))) {
EC_ERR("Unable to register net_device: error %i\n", result);
goto out_free;
}
return 0;
out_free:
free_netdev(eoe->dev);
eoe->dev = NULL;
out_return:
return -1;
}
/*****************************************************************************/
@ -55,6 +103,10 @@ void ec_eoe_init(ec_eoe_t *eoe, ec_slave_t *slave)
void ec_eoe_clear(ec_eoe_t *eoe)
{
if (eoe->dev) {
unregister_netdev(eoe->dev);
free_netdev(eoe->dev);
}
}
/*****************************************************************************/
@ -153,3 +205,85 @@ void ec_eoe_print(const ec_eoe_t *eoe)
}
/*****************************************************************************/
/**
Initializes a net_device structure for an EoE object.
*/
void ec_eoedev_init(struct net_device *dev /**< pointer to the net_device */)
{
ec_eoedev_priv_t *priv;
// initialize net_device
ether_setup(dev);
dev->open = ec_eoedev_open;
dev->stop = ec_eoedev_stop;
dev->hard_start_xmit = ec_eoedev_tx;
dev->get_stats = ec_eoedev_stats;
// initialize private data
priv = netdev_priv(dev);
memset(priv, 0, sizeof(ec_eoedev_priv_t));
}
/*****************************************************************************/
/**
Opens the virtual network device.
*/
int ec_eoedev_open(struct net_device *dev /**< EoE net_device */)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
netif_start_queue(dev);
EC_INFO("%s (slave %i) opened.\n", dev->name,
priv->eoe->slave->ring_position);
return 0;
}
/*****************************************************************************/
/**
Stops the virtual network device.
*/
int ec_eoedev_stop(struct net_device *dev /**< EoE net_device */)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
netif_stop_queue(dev);
EC_INFO("%s (slave %i) stopped.\n", dev->name,
priv->eoe->slave->ring_position);
return 0;
}
/*****************************************************************************/
/**
Transmits data via the virtual network device.
*/
int ec_eoedev_tx(struct sk_buff *skb, /**< transmit socket buffer */
struct net_device *dev /**< EoE net_device */
)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
priv->stats.tx_packets++;
dev_kfree_skb(skb);
EC_INFO("EoE device sent %i octets.\n", skb->len);
return 0;
}
/*****************************************************************************/
/**
Gets statistics about the virtual network device.
*/
struct net_device_stats *ec_eoedev_stats(struct net_device *dev
/**< EoE net_device */)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
return &priv->stats;
}
/*****************************************************************************/

4
master/ethernet.h
View File

@ -29,6 +29,7 @@
/*****************************************************************************/
#include <linux/list.h>
#include <linux/netdevice.h>
#include "../include/ecrt.h"
#include "globals.h"
@ -62,12 +63,13 @@ typedef struct
struct list_head list; /**< list item */
ec_slave_t *slave; /**< pointer to the corresponding slave */
ec_eoe_state_t rx_state; /**< state of the state machine */
struct net_device *dev; /**< net_device for virtual ethernet device */
}
ec_eoe_t;
/*****************************************************************************/
void ec_eoe_init(ec_eoe_t *, ec_slave_t *);
int ec_eoe_init(ec_eoe_t *, ec_slave_t *);
void ec_eoe_clear(ec_eoe_t *);
void ec_eoe_run(ec_eoe_t *);
void ec_eoe_print(const ec_eoe_t *);

5
master/master.c
View File

@ -574,7 +574,10 @@ int ec_master_bus_scan(ec_master_t *master /**< EtherCAT master */)
goto out_free;
}
ec_eoe_init(eoe, slave);
if (ec_eoe_init(eoe, slave)) {
kfree(eoe);
goto out_free;
}
list_add_tail(&eoe->list, &master->eoe_slaves);
}
}