On Mon, 28 Sep 2020 10:58:54 -0700 Tony Nguyen wrote:
> From: Sven Auhagen <sven.auha...@voleatech.de>
>
> Add XDP support to the IGB driver.
> The implementation follows the IXGBE XDP implementation
> closely and I used the following patches as basis:
>
> 1. commit 924708081629 ("ixgbe: add XDP support for pass and drop actions")
> 2. commit 33fdc82f0883 ("ixgbe: add support for XDP_TX action")
> 3. commit ed93a3987128 ("ixgbe: tweak page counting for XDP_REDIRECT")
>
> Due to the hardware constraints of the devices using the
> IGB driver we must share the TX queues with XDP which
> means locking the TX queue for XDP.
>
> I ran tests on an older device to get better numbers.
> Test machine:
>
> Intel(R) Atom(TM) CPU C2338 @ 1.74GHz (2 Cores)
> 2x Intel I211
>
> Routing Original Driver Network Stack: 382 Kpps
>
> Routing XDP Redirect (xdp_fwd_kern): 1.48 Mpps
> XDP Drop: 1.48 Mpps
>
> Using XDP we can achieve line rate forwarding even on
> an older Intel Atom CPU.
>
> Signed-off-by: Sven Auhagen <sven.auha...@voleatech.de>
> Tested-by: Sandeep Penigalapati <sandeep.penigalap...@intel.com>
> Signed-off-by: Tony Nguyen <anthony.l.ngu...@intel.com>
Also some new sparse warnings added here:
drivers/net/ethernet/intel/igb/igb_main.c:6282:23: warning: incorrect type in
assignment (different base types)
drivers/net/ethernet/intel/igb/igb_main.c:6282:23: expected unsigned int
[usertype] olinfo_status
drivers/net/ethernet/intel/igb/igb_main.c:6282:23: got restricted __le32
[usertype]
drivers/net/ethernet/intel/igb/igb_main.c:6287:37: warning: incorrect type in
assignment (different base types)
drivers/net/ethernet/intel/igb/igb_main.c:6287:37: expected restricted
__le32 [usertype] olinfo_status
drivers/net/ethernet/intel/igb/igb_main.c:6287:37: got unsigned int
[assigned] [usertype] olinfo_status
