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[netdevice] Allow devices to indicate that interrupts are not supported

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2011-01-25 14:16:11 +00:00
parent 7bf37147b3
commit 66caec3f00
2 changed files with 18 additions and 0 deletions
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14
src/include/ipxe/netdevice.h
View File

@ -236,6 +236,9 @@ struct net_device_operations {
*
* @v netdev Network device
* @v enable Interrupts should be enabled
*
* This method may be NULL to indicate that interrupts are not
* supported.
*/
void ( * irq ) ( struct net_device *netdev, int enable );
};
@ -515,6 +518,17 @@ netdev_is_open ( struct net_device *netdev ) {
return ( netdev->state & NETDEV_OPEN );
}
/**
* Check whether or not network device supports interrupts
*
* @v netdev Network device
* @ret irq_supported Network device supports interrupts
*/
static inline __attribute__ (( always_inline )) int
netdev_irq_supported ( struct net_device *netdev ) {
return ( netdev->op->irq != NULL );
}
/**
* Check whether or not network device interrupts are currently enabled
*

4
src/net/netdevice.c
View File

@ -542,6 +542,10 @@ void unregister_netdev ( struct net_device *netdev ) {
*/
void netdev_irq ( struct net_device *netdev, int enable ) {
/* Do nothing if device does not support interrupts */
if ( ! netdev_irq_supported ( netdev ) )
return;
/* Enable or disable device interrupts */
netdev->op->irq ( netdev, enable );