09 Jun, 2009
23 commits
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fakehard is a really simple driver implementing only necessary
callbacks and serves the role of an example of driver for HardMAC
IEEE 802.15.4 device.Signed-off-by: Dmitry Eremin-Solenikov
Signed-off-by: Sergey Lapin
Signed-off-by: David S. Miller -
Add MAINTAINERS entry and a small text describing our stack interfaces,
how to hook the drivers, etc.Signed-off-by: Dmitry Eremin-Solenikov
Signed-off-by: Sergey Lapin
Signed-off-by: David S. Miller -
Add a netlink interface for configuration of IEEE 802.15.4 device. Also this
interface specifies events notification sent by devices towards higher layers.Signed-off-by: Dmitry Eremin-Solenikov
Signed-off-by: Sergey Lapin
Signed-off-by: David S. Miller -
Add support for communication over IEEE 802.15.4 networks. This implementation
is neither certified nor complete, but aims to that goal. This commit contains
only the socket interface for communication over IEEE 802.15.4 networks.
One can either send RAW datagrams or use SOCK_DGRAM to encapsulate data
inside normal IEEE 802.15.4 packets.Configuration interface, drivers and software MAC 802.15.4 implementation will
follow.Initial implementation was done by Maxim Gorbachyov, Maxim Osipov and Pavel
Smolensky as a research project at Siemens AG. Later the stack was heavily
reworked to better suit the linux networking model, and is now maitained
as an open project partially sponsored by Siemens.Signed-off-by: Dmitry Eremin-Solenikov
Signed-off-by: Sergey Lapin
Signed-off-by: David S. Miller -
IEEE 802.15.4 stack requires several constants to be defined/adjusted.
Signed-off-by: Dmitry Eremin-Solenikov
Signed-off-by: Sergey Lapin
Signed-off-by: David S. Miller -
Change PSCHED_SHIFT from 10 to 6 to increase schedulers time
resolution. This will increase 16x a number of (internal) ticks per
nanosecond, and is needed to improve accuracy of schedulers based on
rate tables, like HTB, TBF or CBQ, with rates above 100Mbit. It is
assumed this change is safe for 32bit accounting of time diffs up
to 2 minutes, which should be enough for common use (extremely low
rate values may overflow, so get inaccurate instead). To make full
use of this change an updated iproute2 will be needed. (But using
older iproute2 should be safe too.)This change breaks ticks - microseconds similarity, so some minor code
fixes might be needed. It is also planned to change naming adequately
eg. to PSCHED_TICKS2NS() etc. in the near future.Reported-by: Antonio Almeida
Tested-by: Antonio Almeida
Signed-off-by: Jarek Poplawski
Signed-off-by: David S. Miller -
Use PSCHED_SHIFT constant instead of '10' in PSCHED_US2NS() and
PSCHED_NS2US() macros to enable changing this value later.Additionally use PSCHED_SHIFT in sch_hfsc SM_SHIFT and ISM_SHIFT
definitions. This part of the patch is based on feedback from
Patrick McHardy .Reported-by: Antonio Almeida
Tested-by: Antonio Almeida
Signed-off-by: Jarek Poplawski
Signed-off-by: David S. Miller -
commit f001fde5eadd915f4858d22ed70d7040f48767cf
(net: introduce a list of device addresses dev_addr_list (v6))
added one regression Vegard Nossum found in its testings.With kmemcheck help, Vegard found some uninitialized memory
was read and reported to user, potentialy leaking kernel data.
( thread can be found on http://lkml.org/lkml/2009/5/30/177 )dev_addr_init() incorrectly uses sizeof() operator. We were
initializing one byte instead of MAX_ADDR_LEN bytes.Reported-by: Vegard Nossum
Signed-off-by: Eric Dumazet
Acked-by: Jiri Pirko
Signed-off-by: David S. Miller -
This driver does not indicate support for frag lists.
Furthermore, even if it did, the code is walking the frag
lists incorrectly. The idiom is:for (iter = skb_shinfo(skb)->frag_list; iter; iter = iter->next)
but it's doing:
for (iter = skb_shinfo(skb)->frag_list; iter;
iter = skb_shinfo(iter)->frag_list)which would never work. And this proves that this driver never
saw an SKB with active frag lists.So just remove the code altogether and the driver TX path becomes
much simpler.Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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Signed-off-by: David S. Miller
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With the hope that these can be used to eliminate direct
references to the frag list implementation.Signed-off-by: David S. Miller
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Furthermore, it twiddles with the details of SKB list handling
directly, which we're trying to eliminate.Signed-off-by: David S. Miller
08 Jun, 2009
17 commits
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A driver overhaul on 29 Feb 2000 (!) broke locking around fiddling with
the tx descriptor ring in start_xmit(); a follow-on "fix" removed the
broken remnants altogether. Here's a patch to restore proper locking in
the function -- the complement in the interrupt handler has been correct
all the time.This *may* have been the reason for the occasional confusion of the chip
-- triggering a tx timeout followed by a chip reset sequence -- seen on
R4k-based DECstations with the onboard Ethernet interface. Another theory
is the confusion is due to an unindentified problem -- perhaps a silicon
erratum -- associated with the variation of the MT ASIC used to interface
the R4k CPU to the rest of the system on these computers; with its
aggressive write-back buffering the design is particularly weakly ordered
when it comes to MMIO (in the absence of ordering barriers uncached reads
are allowed to bypass earlier uncached writes, even if to the same
location), which may trigger all kinds of corner cases in peripheral
hardware as well as software.Either way this piece of code is buggy.
Signed-off-by: Maciej W. Rozycki
Signed-off-by: David S. Miller -
Clarify calling context and return codes of callback methods, and
add a description of the _cmsg structure and helper functions.Impact: documentation
Signed-off-by: Tilman Schmidt
Signed-off-by: David S. Miller -
The dereferencing of the private pointer cmsg->m in capi_cmsg2str() may
cause an Oops in case of an error, which is particularly inconvenient
as that function is typically used to format an error message. Add a
NULL pointer check to avoid this.Impact: error handling improvement
Signed-off-by: Tilman Schmidt
Signed-off-by: David S. Miller -
Add kerneldoc comments for the exported funtions in capiutil.c.
Impact: documentation
Signed-off-by: Tilman Schmidt
Signed-off-by: David S. Miller -
Change the name of the Kernel CAPI exported function capi_ctr_reseted()
to something representing its purpose better.Impact: renaming, no functional change
Signed-off-by: Tilman Schmidt
Signed-off-by: David S. Miller -
It is possible for tun_chr_close to race with dellink on the
a tun device. In which case if __tun_get runs before dellink
but dellink runs before tun_chr_close calls unregister_netdevice
we will attempt to unregister the netdevice after it is already
gone.The two cases are already serialized on the rtnl_lock, so I have
gone for the cheap simple fix of moving rtnl_lock to cover __tun_get
in tun_chr_close. Eliminating the possibility of the tun device
being unregistered between __tun_get and unregister_netdevice in
tun_chr_close.Signed-off-by: Eric W. Biederman
Tested-by: David Woodhouse
Signed-off-by: David S. Miller -
BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)) was being hit
during e100 EEH recovery. The problem source was a napi_enable
call being made during e100_io_error_detected. Napi should remain
disabled after e100_down, and only be reenabled when the interface
is recovered.This patch also updates e100_io_error_detected in order to make
it similar to the current versions of the error_detected callback
in drivers such as e1000e and ixgbe.Signed-off-by: Andre Detsch
Signed-off-by: David S. Miller -
vfree() does its own 'NULL' check, so no need for check before
calling it.Signed-off-by: Figo.zhang
Signed-off-by: David S. Miller -
If mlx4_create_eq() would fail for one of EQ's assigned for
completion handling, the code would try to free the same EQ
we failed to create.
The crash was found by Christoph LameterSigned-off-by: Yevgeny Petrilin
Signed-off-by: David S. Miller -
Use the right structure while incrementing the offset in tun_get_user.
Signed-off-by: Sridhar Samudrala
Acked-by: Michael S. Tsirkin
Signed-off-by: David S. Miller -
Increment the iovec base by the offset passed in for the initial
copy_to_user() in memcpy_to_iovecend().Signed-off-by: Sridhar Samudrala
Acked-by: Michael S. Tsirkin
Signed-off-by: David S. Miller -
I am working on enabling UFO between KVM guests using virtio-net and i have
some patches that i got working with 2.6.30-rc8. When i wanted to try them
with net-next-2.6, i noticed that virtio-net is not working with that tree.After some debugging, it turned out to be several bugs in the recent patches
to fix aio with tun driver, specifically the following 2 commits.http://git.kernel.org/?p=linux/kernel/git/davem/net-next-2.6.git;a=commitdiff;h=0a1ec07a67bd8b0033dace237249654d015efa21
http://git.kernel.org/?p=linux/kernel/git/davem/net-next-2.6.git;a=commitdiff;h=6f26c9a7555e5bcca3560919db9b852015077daeFix the call to memcpy_from_iovecend() in skb_copy_datagram_from_iovec
to pass the right iovec offset.Signed-off-by: Sridhar Samudrala
Acked-by: Michael S. Tsirkin
Signed-off-by: David S. Miller -
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 -
Get rid of num_dma_maps in struct skb_shared_info, as it seems unused.
Signed-off-by: Eric Dumazet
Signed-off-by: David S. Miller -
Remove the private definition of TRUE/FALSE and use the ones from
linux/stddef.h. Also remove the definition of BOOL which is not referenced
inside the driver anyway.Signed-off-by: Tobias Klauser
Signed-off-by: David S. Miller -
Signed-off-by: Paulius Zaleckas
Signed-off-by: David S. Miller -
This is a driver for the Micrel KS8842 ethernet switch.
The supplied code is for driving the KS8842 through the Timberdale FPGA
on the Russellville board, a development board for Intel Atom CPU
in the automotive area.Signed-off-by: Richard Röjfors
Signed-off-by: David S. Miller
