linux-toradex.git/include/linux/etherdevice.h, branch v2.6.36-rc7

etherdevice.h: fix kernel-doc typo

2010-08-10T07:09:20+00:00

Fix etherdevice.h parameter name typo in kernel-doc:

Warning(include/linux/etherdevice.h:138): No description found for parameter 'hwaddr'
Warning(include/linux/etherdevice.h:138): Excess function parameter 'addr' description in 'dev_hw_addr_random'

Signed-off-by: Randy Dunlap 
Signed-off-by: David S. Miller

sysfs: add attribute to indicate hw address assignment type

2010-07-25T03:49:29+00:00

Add addr_assign_type to struct net_device and expose it via sysfs.
This new attribute has the purpose of giving user-space the ability to
distinguish between different assignment types of MAC addresses.

For example user-space can treat NICs with randomly generated MAC
addresses differently than NICs that have permanent (locally assigned)
MAC addresses.
For the former udev could write a persistent net rule by matching the
device path instead of the MAC address.
There's also the case of devices that 'steal' MAC addresses from slave
devices. In which it is also be beneficial for user-space to be aware
of the fact.

This patch also introduces a helper function to assist adoption of
drivers that generate MAC addresses randomly.

Signed-off-by: Stefan Assmann 
Signed-off-by: David S. Miller

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