what is the use of poll function int a net_device struct

hi:

   Where is the handler function defined  for an netcard's  IRQ  ? 
   When an IRQ has reached,  how to wake_up the wait_queue of the socket?

thanks1

 

Hi,

On Mon, Jan 14, 2013 at 4:21 PM, horseriver [off-list ref] wrote:

Where is the handler function defined  for an netcard's  IRQ

look for the request_irq() method; you register the handler with this method.

for example,
in e1000e:

http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/e1000e/netdev.c

err = request_irq(adapter->msix_entries[vector].vector,
                           e1000_intr_msix_rx, 0,
                          adapter->rx_ring->name,
                             netdev);

so the handler is   e1000_intr_msix_rx().

When an IRQ has reached,  how to wake_up the wait_queue of the socket?
TCP/UDP packet goes up from the driver to L3 and then to L4 (in case
it is for this machine). In L4 you should find the
wake_up of the wait_queue of the socket.

Regards,
Rami Rosen
http://ramirose.wix.com/ramirosen

On Tue, Jan 15, 2013 at 03:20:39PM +0200, Rami Rosen wrote:

Hi,

On Mon, Jan 14, 2013 at 4:21 PM, horseriver [off-list ref] wrote:

quoted

Where is the handler function defined  for an netcard's  IRQ

look for the request_irq() method; you register the handler with this method.

for example,
in e1000e:

http://lxr.free-electrons.com/source/drivers/net/ethernet/intel/e1000e/netdev.c

err = request_irq(adapter->msix_entries[vector].vector,
                           e1000_intr_msix_rx, 0,
                          adapter->rx_ring->name,
                             netdev);

so the handler is   e1000_intr_msix_rx().

When an IRQ has reached,  how to wake_up the wait_queue of the socket?
TCP/UDP packet goes up from the driver to L3 and then to L4 (in case
it is for this machine). In L4 you should find the
wake_up of the wait_queue of the socket.

  
  thanks!
  
  In L4, wake_up should be fired  by IRQ event.
  where is the code for fire this callback ?

  

Regards,
Rami Rosen
http://ramirose.wix.com/ramirosen