linux.git/drivers/net/igb, branch v2.6.31

igb: gcc-3.4.6 fix

2009-07-13T18:11:41+00:00

forward declaration of inline function should be avoided, or
old gcc cannot compile.

Reported-by: Teck Choon Giam 
Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

igb: set lan id prior to configuring phy

2009-07-08T17:46:43+00:00

The igb driver was defaulting to using the lock for pci-e function 0 for
all of the phys due to the fact that the lan id was not being set prior to
initialization.  This change makes it so that the function id is set prior
to checking for the phy id.

Signed-off-by: Alexander Duyck 
Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller

igb: return PCI_ERS_RESULT_DISCONNECT on permanent error

2009-07-01T02:47:04+00:00

PCI drivers that implement the io_error_detected callback should return
PCI_ERS_RESULT_DISCONNECT if the state passed in is
pci_channel_io_perm_failure.  This patch fixes the issue for igb.

Signed-off-by: Alexander Duyck 
Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller

igb: fix unmap length bug

2009-07-01T02:46:57+00:00

driver was mixing NET_IP_ALIGN count bytes in map/unmap calls
unevenly. Only map the bytes that the hardware might dma into

also fix unmap related bug where ->dma was not being cleared
after unmap

Signed-off-by: Jesse Brandeburg 
Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller

net: skb_shared_info optimization

2009-06-08T07:21:48+00:00

skb_dma_unmap() is quite expensive for small packets,
because we use two different cache lines from skb_shared_info.

One to access nr_frags, one to access dma_maps[0]

Instead of dma_maps being an array of MAX_SKB_FRAGS + 1 elements,
let dma_head alone in a new dma_head field, close to nr_frags,
to reduce cache lines misses.

Tested on my dev machine (bnx2 & tg3 adapters), nice speedup !

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: dont update dev->trans_start

2009-05-29T08:46:27+00:00

Second round of drivers for Gb cards (and NIU one I forgot in the 10GB round)

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.

Exceptions are NETIF_F_LLTX drivers

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

igb/e1000e: update PSSR_MDIX value to reflect correct bit

2009-05-27T03:35:06+00:00

The phy port status register has the MDI-X status bit on bit 11, not bit 3
as is currently setup in the define.  This patch corrects that so the
correct bit is checked on igp PHY types.

Signed-off-by: Alexander Duyck 
Acked-by: Bruce Allan 
Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller

igb: Record host memory receive overflow in net_stats

2009-05-27T03:35:06+00:00

Based on previous patch from Jesper Dangaard Brouer.

The RNBC (Receive No Buffers Count) register for the 82576, indicate
that frames were received when there were no available buffers in host
memory to store those frames (receive descriptor head and tail
pointers were equal).  The packet is still received by the NIC if
there is space in the FIFO on the NIC.

As the RNBC value is not a packet drop, the driver stores this value
in net_stats.rx_fifo_errors to indicate that there were no system
buffers available for the incoming packet.  Actual dropped packets
are counted in the MPC value.

Saving the stats in dev->net_stats makes it visible via
/proc/net/dev as "fifo", and thus viewable to ifconfig
as "overruns" and 'netstat -i' as "RX-OVR".

The Receive No Buffers Count (RNBC) can already be queried by
ethtool -S as "rx_no_buffer_count".

Signed-off-by: Jeff Kirsher 
CC: Jesper Dangaard Brouer 
Signed-off-by: David S. Miller

igb: Implement reading of reg RQDPC (Receive Queue Drop Packet Count)

2009-05-27T03:35:05+00:00

Based on the previous patches from Jesper Dangaard Brouer 

Implement reading the per queue drop stats register
RQDPC (Receive Queue Drop Packet Count).  It counts the number of
packets dropped by a queue due to lack of descriptors available.

Notice RQDPC (Receive Queue Drop Packet Count) stats only gets
incremented, if the DROP_EN bit it set (in the SRRCTL register
for that queue).  If DROP_EN bit is NOT set, then the some what
equivalent count is stored in RNBC (not per queue basis).

The RQDPC register is only 12 bit, thus the precision might
suffer due to overrun in-netween the watchdog polling interval.

Signed-off-by: Jeff Kirsher 
CC: Jesper Dangaard Brouer 
Signed-off-by: David S. Miller

igb: add RQDPC (Receive Queue Drop Packet Count) register macro

2009-05-27T03:35:04+00:00

Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller