linux-toradex.git/include/linux/virtio_net.h, branch Colibri_T30_LinuxImageV2.1Beta2_20140206

virtio_net: introduce VIRTIO_NET_HDR_F_DATA_VALID

2011-06-11T22:57:47+00:00

There's no need for the guest to validate the checksum if it have been
validated by host nics. So this patch introduces a new flag -
VIRTIO_NET_HDR_F_DATA_VALID which is used to bypass the checksum
examing in guest. The backend (tap/macvtap) may set this flag when
met skbs with CHECKSUM_UNNECESSARY to save cpu utilization.

No feature negotiation is needed as old driver just ignore this flag.

Iperf shows 12%-30% performance improvement for UDP traffic. For TCP,
when gro is on no difference as it produces skb with partial
checksum. But when gro is disabled, 20% or even higher improvement
could be measured by netperf.

Signed-off-by: Jason Wang 
Acked-by: Michael S. Tsirkin 
Signed-off-by: David S. Miller

virtio: add full three-clause BSD text to headers.

2011-05-30T01:44:14+00:00

It's unclear to me if it's important, but it's obviously causing my
technical colleages some headaches and I'd hate such imprecision to
slow virtio adoption.

I've emailed this to all non-trivial contributors for approval, too.

Signed-off-by: Rusty Russell 
Acked-by: Grant Likely 
Acked-by: Ryan Harper 
Acked-by: Anthony Liguori 
Acked-by: Eric Van Hensbergen 
Acked-by: john cooper 
Acked-by: Aneesh Kumar K.V 
Acked-by: Christian Borntraeger 
Acked-by: Fernando Luis Vazquez Cao

virtio: let header files include virtio_ids.h

2009-10-22T06:09:28+00:00

Rusty,

commit 3ca4f5ca73057a617f9444a91022d7127041970a
    virtio: add virtio IDs file
moved all device IDs into a single file. While the change itself is
a very good one, it can break userspace applications. For example
if a userspace tool wanted to get the ID of virtio_net it used to
include virtio_net.h. This does no longer work, since virtio_net.h
does not include virtio_ids.h.
This patch moves all "#include " from the C
files into the header files, making the header files compatible with
the old ones.

In addition, this patch exports virtio_ids.h to userspace.

CC: Fernando Luis Vazquez Cao 
Signed-off-by: Christian Borntraeger 
Signed-off-by: Rusty Russell

virtio: add virtio IDs file

2009-09-23T12:56:32+00:00

Virtio IDs are spread all over the tree which makes assigning new IDs
bothersome. Putting them together should make the process less error-prone.

Signed-off-by: Fernando Luis Vazquez Cao 
Signed-off-by: Rusty Russell

lguest and virtio: cleanup struct definitions to Linux style.

2009-07-30T06:33:46+00:00

I've been doing this for years, and akpm picked me up on it about 12
months ago.  lguest partly serves as example code, so let's do it Right.

Also, remove two unused fields in struct vblk_info in the example launcher.

Signed-off-by: Rusty Russell 
Cc: Ingo Molnar

virtio_net: Sync header with qemu

2009-07-17T12:17:47+00:00

Qemu added support for a few extra RX modes that Linux doesn't
currently make use of.  Sync the headers to maintain consistency.

Signed-off-by: Alex Williamson 
Signed-off-by: Rusty Russell

virtio: add missing include to virtio_net.h

2009-05-01T22:34:02+00:00

virtio_net.h uses the macro ETH_ALEN which is defined in linux/if_ether.h.
Discovered when hacking on virtio-over-pci patches.

Signed-off-by: Grant Likely 
Signed-off-by: David S. Miller

virtio_net: Add support for VLAN filtering in the hypervisor

2009-02-05T00:35:13+00:00

VLAN filtering allows the hypervisor to drop packets from VLANs
that we're not a part of, further reducing the number of extraneous
packets recieved.  This makes use of the VLAN virtqueue command class.
The CTRL_VLAN feature bit tells us whether the backend supports VLAN
filtering.

Signed-off-by: Alex Williamson 
Acked-by: Rusty Russell 
Signed-off-by: David S. Miller

virtio_net: Add a MAC filter table

2009-02-05T00:35:13+00:00

Make use of the MAC control virtqueue class to support a MAC
filter table.  The filter table is managed by the hypervisor.
We consider the table to be available if the CTRL_RX feature
bit is set.  We leave it to the hypervisor to manage the table
and enable promiscuous or all-multi mode as necessary depending
on the resources available to it.

Signed-off-by: Alex Williamson 
Acked-by: Rusty Russell 
Signed-off-by: David S. Miller

virtio_net: Add a set_rx_mode interface

2009-02-05T00:35:12+00:00

Make use of the RX_MODE control virtqueue class to enable the
set_rx_mode netdev interface.  This allows us to selectively
enable/disable promiscuous and allmulti mode so we don't see
packets we don't want.  For now, we automatically enable these
as needed if additional unicast or multicast addresses are
requested.

Signed-off-by: Alex Williamson 
Acked-by: Rusty Russell 
Signed-off-by: David S. Miller