linux-toradex.git/drivers/net/ntb_netdev.c, branch v4.4.93

NTB: Add flow control to the ntb_netdev

2015-09-07T19:17:08+00:00

Right now if we push the NTB really hard, we start dropping packets due
to not able to process the packets fast enough. We need to st:qop the
upper layer from flooding us when that happens.

A timer is necessary in order to restart the queue once the resource has
been processed on the receive side. Due to the way NTB is setup, the
resources on the tx side are tied to the processing of the rx side and
there's no async way to know when the rx side has released those
resources.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

NTB: ntb_netdev not covering all receive errors

2015-08-09T20:32:21+00:00

ntb_netdev is allowing the link to come up even when -ENOMEM is returned
from ntb_transport_rx_enqueue.  Fix to cover all possible errors.

Signed-off-by: Dave Jiang 
Signed-off-by: Jon Mason

NTB: Fix ntb_transport out-of-order RX update

2015-08-09T20:32:21+00:00

It was possible for a synchronous update of the RX index in the error
case to get ahead of the asynchronous RX index update in the normal
case.  Change the RX processing to preserve an RX completion order.

There were two error cases.  First, if a buffer is not present to
receive data, there would be no queue entry to preserve the RX
completion order.  Instead of dropping the RX frame, leave the RX frame
in the ring.  Schedule RX processing when RX entries are enqueued, in
case there are RX frames waiting in the ring to be received.

Second, if a buffer is too small to receive data, drop the frame in the
ring, mark the RX entry as done, and indicate the error in the RX entry
length.  Check for a negative length in the receive callback in
ntb_netdev, and count occurrences as rx_length_errors.

Signed-off-by: Allen Hubbe 
Signed-off-by: Jon Mason

NTB: Split ntb_hw_intel and ntb_transport drivers

2015-07-04T18:05:49+00:00

Change ntb_hw_intel to use the new NTB hardware abstraction layer.

Split ntb_transport into its own driver.  Change it to use the new NTB
hardware abstraction layer.

Signed-off-by: Allen Hubbe 
Signed-off-by: Jon Mason

NTB: Move files in preparation for NTB abstraction

2015-07-02T14:09:23+00:00

This patch only moves files to their new locations, before applying the
next two patches adding the NTB Abstraction layer.  Splitting this patch
from the next is intended make distinct which code is changed only due
to moving the files, versus which are substantial code changes in adding
the NTB Abstraction layer.

Signed-off-by: Allen Hubbe 
Signed-off-by: Jon Mason

net: use ethtool_cmd_speed_set helper to set ethtool speed value

2014-06-06T23:24:07+00:00

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

net: get rid of SET_ETHTOOL_OPS

2014-05-13T21:43:20+00:00

net: get rid of SET_ETHTOOL_OPS

Dave Miller mentioned he'd like to see SET_ETHTOOL_OPS gone.
This does that.

Mostly done via coccinelle script:
@@
struct ethtool_ops *ops;
struct net_device *dev;
@@
-       SET_ETHTOOL_OPS(dev, ops);
+       dev->ethtool_ops = ops;

Compile tested only, but I'd seriously wonder if this broke anything.

Suggested-by: Dave Miller 
Signed-off-by: Wilfried Klaebe 
Acked-by: Felipe Balbi 
Signed-off-by: David S. Miller

NTB: Code Style Clean-up

2014-04-07T17:59:19+00:00

Some white space and 80 char overruns corrected.

Signed-off-by: Jon Mason

NTB: client event cleanup

2014-04-07T17:59:19+00:00

Provide a better event interface between the client and transport

Signed-off-by: Jon Mason

ntb_netdev: Fix skb free issue in open

2014-04-07T17:58:14+00:00

In ntb_netdev_open, when ntb_transport_rx_enqueue fails the skb that was
attempting to be enqueued is not freed.  Free this skb on the
ntb_transport_rx_enqueue error.

Signed-off-by: Jon Mason