linux-toradex.git/include/linux/etherdevice.h, branch tegra-10.9.9

net: introduce a list of device addresses dev_addr_list (v6)

2009-05-05T19:26:24+00:00

v5 -> v6 (current):
-removed so far unused static functions
-corrected dev_addr_del_multiple to call del instead of add

v4 -> v5:
-added device address type (suggested by davem)
-removed refcounting (better to have simplier code then safe potentially few
 bytes)

v3 -> v4:
-changed kzalloc to kmalloc in __hw_addr_add_ii()
-ASSERT_RTNL() avoided in dev_addr_flush() and dev_addr_init()

v2 -> v3:
-removed unnecessary rcu read locking
-moved dev_addr_flush() calling to ensure no null dereference of dev_addr

v1 -> v2:
-added forgotten ASSERT_RTNL to dev_addr_init and dev_addr_flush
-removed unnecessary rcu_read locking in dev_addr_init
-use compare_ether_addr_64bits instead of compare_ether_addr
-use L1_CACHE_BYTES as size for allocating struct netdev_hw_addr
-use call_rcu instead of rcu_synchronize
-moved is_etherdev_addr into __KERNEL__ ifdef

This patch introduces a new list in struct net_device and brings a set of
functions to handle the work with device address list. The list is a replacement
for the original dev_addr field and because in some situations there is need to
carry several device addresses with the net device. To be backward compatible,
dev_addr is made to point to the first member of the list so original drivers
sees no difference.

Signed-off-by: Jiri Pirko 
Signed-off-by: David S. Miller

gro: Optimise Ethernet header comparison

2009-02-09T04:22:18+00:00

This patch optimises the Ethernet header comparison to use 2-byte
and 4-byte xors instead of memcmp.  In order to facilitate this,
the actual comparison is now carried out by the callers of the
shared dev_gro_receive function.

This has a significant impact when receiving 1500B packets through
10GbE.

Signed-off-by: Herbert Xu 
Signed-off-by: David S. Miller

eth: Declare an optimized compare_ether_addr_64bits() function

2008-11-24T07:24:32+00:00

Linus mentioned we could try to perform long word operations, even
on potentially unaligned addresses, on x86 at least. David mentioned
the HAVE_EFFICIENT_UNALIGNED_ACCESS test to handle this on all
arches that have efficient unailgned accesses.

I tried this idea and got nice assembly on 32 bits:

158:   33 82 38 01 00 00       xor    0x138(%edx),%eax
15e:   33 8a 34 01 00 00       xor    0x134(%edx),%ecx
164:   c1 e0 10                shl    $0x10,%eax
167:   09 c1                   or     %eax,%ecx
169:   74 0b                   je     176 

And very nice assembly on 64 bits of course (one xor, one shl)

Nice oprofile improvement in eth_type_trans(), 0.17 % instead of 0.41 %,
expected since we remove 8 instructions on a fast path.

This patch implements a compare_ether_addr_64bits() function, that
uses the CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS ifdef to efficiently
perform the 6 bytes comparison on all capable arches.

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

netdev: expose ethernet address primitives

2008-11-20T06:42:31+00:00

When ethernet devices are converted, the function pointer setup
by eth_setup() need to be done during intialization.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

docbook: make a networking book and fix a few errors

2008-02-14T00:21:19+00:00

Move networking (core and drivers) docbook to its own networking book.
Fix a few kernel-doc errors in header and source files.

Signed-off-by: Randy Dunlap 
Cc: Trond Myklebust 
Cc: "J. Bruce Fields" 
Cc: Neil Brown 
Cc: "David S. Miller" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[NET]: Move hardware header operations out of netdevice.

2007-10-10T23:52:52+00:00

Since hardware header operations are part of the protocol class
not the device instance, make them into a separate object and
save memory.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller

[CORE] Stack changes to add multiqueue hardware support API

2007-07-11T05:16:21+00:00

Add the multiqueue hardware device support API to the core network
stack.  Allow drivers to allocate multiple queues and manage them at
the netdev level if they choose to do so.

Added a new field to sk_buff, namely queue_mapping, for drivers to
know which tx_ring to select based on OS classification of the flow.

Signed-off-by: Peter P Waskiewicz Jr 
Signed-off-by: Patrick McHardy 
Signed-off-by: David S. Miller

[NET]: Kill eth_copy_and_sum().

2007-07-11T05:08:12+00:00

It hasn't "summed" anything in over 7 years, and it's
just a straight mempcy ala skb_copy_to_linear_data()
so just get rid of it.

Signed-off-by: David S. Miller

uml: improve checking and diagnostics of ethernet MACs

2007-05-07T19:13:02+00:00

Improve checking and diagnostics for broadcast and multicast Ethernet MAC
addresses, and distinguish between those cases in output; also make sure the
device is assigned a MAC address valid only locally to avoid collisions.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[NET]: Don't exclude broadcast addresses from is_multicast_ether_addr()

2006-01-03T23:25:45+00:00

The check for multicast shouldn't exclude broadcast type addresses.
This reverts the incorrect change done in 2.6.13.

The broadcast address is a multicast address and should be excluded
from being a valid_ether_address for use in bridging or device address.

Signed-off-by: Stephen Hemminger 
Signed-off-by: David S. Miller