linux-toradex.git/drivers/net/xen-netback/common.h, branch v4.16

net/xen-netback: Convert timers to use timer_setup()

2017-10-18T11:40:27+00:00

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Cc: Wei Liu 
Cc: Paul Durrant 
Cc: xen-devel@lists.xenproject.org
Cc: netdev@vger.kernel.org
Signed-off-by: Kees Cook 
Signed-off-by: David S. Miller

xen-netback: correctly schedule rate-limited queues

2017-06-22T15:15:42+00:00

Add a flag to indicate if a queue is rate-limited. Test the flag in
NAPI poll handler and avoid rescheduling the queue if true, otherwise
we risk locking up the host. The rescheduling will be done in the
timer callback function.

Reported-by: Jean-Louis Dupond 
Signed-off-by: Wei Liu 
Tested-by: Jean-Louis Dupond 
Reviewed-by: Paul Durrant 
Signed-off-by: David S. Miller

xen-netback: vif counters from int/long to u64

2017-02-14T02:49:53+00:00

This patch fixes an issue where the type of counters in the queue(s)
and interface are not in sync (queue counters are int, interface
counters are long), causing incorrect reporting of tx/rx values
of the vif interface and unclear counter overflows.
This patch sets both counters to the u64 type.

Signed-off-by: Mart van Santen 
Reviewed-by: Paul Durrant 
Signed-off-by: David S. Miller

xen-netback: (re-)create a debugfs node for hash information

2016-10-13T13:53:09+00:00

It is useful to be able to see the hash configuration when running tests.
This patch adds a debugfs node for that purpose.

The original version of this patch (commit c0c64c152389) was reverted due
to build failures caused by a conflict with commit 0364a8824c02
("xen-netback: switch to threaded irq for control ring"). This new version
of the patch is nearly identical to the original, the only difference
being that creation of the debugfs node is predicated on 'ctrl_irq' being
non-zero rather then the now non-existent 'ctrl_task'.

Signed-off-by: Paul Durrant 
Cc: Wei Liu 
Cc: David S. Miller 
Acked-by: Wei Liu 
Signed-off-by: David S. Miller

xen-netback: batch copies for multiple to-guest rx packets

2016-10-07T00:37:36+00:00

Instead of flushing the copy ops when an packet is complete, complete
packets when their copy ops are done.  This improves performance by
reducing the number of grant copy hypercalls.

Latency is still limited by the relatively small size of the copy
batch.

Signed-off-by: David Vrabel 
[re-based]
Signed-off-by: Paul Durrant 
Signed-off-by: David S. Miller

xen-netback: refactor guest rx

2016-10-07T00:37:35+00:00

Refactor the to-guest (rx) path to:

1. Push responses for completed skbs earlier, reducing latency.

2. Reduce the per-queue memory overhead by greatly reducing the
   maximum number of grant copy ops in each hypercall (from 4352 to
   64).  Each struct xenvif_queue is now only 44 kB instead of 220 kB.

3. Make the code more maintainable.

Signed-off-by: David Vrabel 
[re-based]
Signed-off-by: Paul Durrant 
Signed-off-by: David S. Miller

xen-netback: retire guest rx side prefix GSO feature

2016-10-07T00:37:35+00:00

As far as I am aware only very old Windows network frontends make use of
this style of passing GSO packets from backend to frontend. These
frontends can easily be replaced by the freely available Xen Project
Windows PV network frontend, which uses the 'default' mechanism for
passing GSO packets, which is also used by all Linux frontends.

NOTE: Removal of this feature will not cause breakage in old Windows
      frontends. They simply will no longer receive GSO packets - the
      packets instead being fragmented in the backend.

Signed-off-by: Paul Durrant 
Reviewed-by: David Vrabel 
Signed-off-by: David S. Miller

Revert "xen-netback: create a debugfs node for hash information"

2016-09-23T13:09:31+00:00

This reverts commit c0c64c152389ad73306b9b0796357210ec6d32ee.

There is no vif->ctrl_task member, so this change broke
the build.

Signed-off-by: David S. Miller

xen-netback: switch to threaded irq for control ring

2016-09-22T12:26:24+00:00

Instead of open coding it use the threaded irq mechanism in
xen-netback.

Signed-off-by: Juergen Gross 
Acked-by: Wei Liu 
Signed-off-by: David S. Miller

xen-netback: create a debugfs node for hash information

2016-08-19T06:29:09+00:00

It is useful to be able to see the hash configuration when running tests.
This patch adds a debugfs node for that purpose.

Signed-off-by: Paul Durrant 
Cc: Wei Liu 
Acked-by: Wei Liu 
Signed-off-by: David S. Miller