netdev - Re: what is the use of poll function int a net

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Date:	Tue, 15 Jan 2013 15:20:39 +0200
From:	Rami Rosen <roszenrami@...il.com>
To:	horseriver <horserivers@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: what is the use of poll function int a net_device struct

Hi,

On Mon, Jan 14, 2013 at 4:21 PM, horseriver <horserivers@...il.com> 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
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