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[netdevice] Add the concept of a network upper-layer driver

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Add the concept of a network upper-layer driver, which can create
arbitrary devices on top of network devices.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-09-05 00:55:23 +01:00
parent 97ef28aea0
commit ca4df90a63
2 changed files with 115 additions and 36 deletions
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60
src/include/ipxe/netdevice.h
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@@ -344,6 +344,34 @@ struct net_device {
/** Declare a network-layer protocol */
#define __net_protocol __table_entry ( NET_PROTOCOLS, 01 )
/** A network upper-layer driver */
struct net_driver {
/** Name */
const char *name;
/** Probe device
*
* @v netdev Network device
* @ret rc Return status code
*/
int ( * probe ) ( struct net_device *netdev );
/** Notify of device or link state change
*
* @v netdev Network device
*/
void ( * notify ) ( struct net_device *netdev );
/** Remove device
*
* @v netdev Network device
*/
void ( * remove ) ( struct net_device *netdev );
};
/** Network driver table */
#define NET_DRIVERS __table ( struct net_driver, "net_drivers" )
/** Declare a network driver */
#define __net_driver __table_entry ( NET_DRIVERS, 01 )
extern struct list_head net_devices;
extern struct net_device_operations null_netdev_operations;
extern struct settings_operations netdev_settings_operations;
@@ -451,27 +479,6 @@ netdev_settings_init ( struct net_device *netdev ) {
netdev->settings.settings.op = &netdev_settings_operations;
}
/**
* Mark network device as having link up
*
* @v netdev Network device
*/
static inline __attribute__ (( always_inline )) void
netdev_link_up ( struct net_device *netdev ) {
netdev->link_rc = 0;
}
/**
* Mark network device as having link down due to a specific error
*
* @v netdev Network device
* @v rc Link status code
*/
static inline __attribute__ (( always_inline )) void
netdev_link_err ( struct net_device *netdev, int rc ) {
netdev->link_rc = rc;
}
/**
* Check link state of network device
*
@@ -505,6 +512,7 @@ netdev_irq_enabled ( struct net_device *netdev ) {
return ( netdev->state & NETDEV_IRQ_ENABLED );
}
extern void netdev_link_err ( struct net_device *netdev, int rc );
extern void netdev_link_down ( struct net_device *netdev );
extern int netdev_tx ( struct net_device *netdev, struct io_buffer *iobuf );
extern void netdev_tx_complete_err ( struct net_device *netdev,
@@ -554,4 +562,14 @@ static inline void netdev_tx_complete_next ( struct net_device *netdev ) {
netdev_tx_complete_next_err ( netdev, 0 );
}
/**
* Mark network device as having link up
*
* @v netdev Network device
*/
static inline __attribute__ (( always_inline )) void
netdev_link_up ( struct net_device *netdev ) {
netdev_link_err ( netdev, 0 );
}
#endif /* _IPXE_NETDEVICE_H */