linux-toradex.git/drivers/net/niu.c, branch v2.6.27.49

niu: Fix readq implementation when architecture does not provide one.

2008-12-13T23:29:12+00:00

[ Upstream commit e23a59e1ca6d177a57a7791b3629db93ff1d9813 ]

This fixes a TX hang reported by Jesper Dangaard Brouer.

When an architecutre cannot provide a fully functional
64-bit atomic readq/writeq, the driver must implement
it's own.  This is because only the driver can say whether
doing something like using two 32-bit reads to implement
the full 64-bit read will actually work properly.

In particular one of the issues is whether the top 32-bits
or the bottom 32-bits of the 64-bit register should be read
first.  There could be side effects, and in fact that is
exactly the problem here.

The TX_CS register has counters in the upper 32-bits and
state bits in the lower 32-bits.  A read clears the state
bits.

We would read the counter half before the state bit half.
That first read would clear the state bits, and then the
driver thinks that no interrupts are pending because the
interrupt indication state bits are seen clear every time.

Fix this by reading the bottom half before the upper half.

Tested-by: Jesper Dangaard Brouer 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

niu: panic on reset

2008-09-12T23:04:26+00:00

The reset_task function in the niu driver does not reset the tx and rx
buffers properly. This leads to panic on reset. This patch is a
modified implementation of the previously posted fix.

Signed-off-by: Santwona Behera 
Signed-off-by: David S. Miller

niu: Fix error checking in niu_ethflow_to_class.

2008-07-30T06:59:20+00:00

The callers of niu_ethflow_to_class expect zero as error, but it returns
-1 instead.

Signed-off-by: Andreas Schwab 
Signed-off-by: David S. Miller

niu: Add TX multiqueue support.

2008-07-18T02:21:17+00:00

Signed-off-by: David S. Miller

niu: Add support for rx flow hash configuration.

2008-07-02T10:49:11+00:00

Implemented ethtool callback functions for configuring receive flow
hashing in the niu driver.

Signed-off-by: Santwona Behera 
Signed-off-by: David S. Miller

niu: Determine the # of ports from the card's VPD data

2008-05-12T10:10:59+00:00

Determine the number of physical ports from the card's VPD data.
Previous fix failed on Maramba platform which doesn't have the
"board-model" property. This fix uses the "model" property which
exists on all cards and Neptune based motherboards.

cstyle cleanup included.

Signed-off-by: Matheos Worku 
Signed-off-by: David S. Miller

niu: Fix probing regression for maramba on-board chips.

2008-05-04T08:34:31+00:00

Changeset 7f7c4072ea552f97a0898331322f71986a97299c ("niu: Determine
the # of ports from the card's VPD data") caused maramba on-board
NIU ports to stop probing properly.

The old code had a fallback that would use a num_ports value of
4 if all the probing methods failed, but that was removed.

This restores the fallback of 4 ports, to get things working
again.

Bump driver version and release date.

Signed-off-by: David S. Miller

niu: Add support for Neptune FEM/NEM cards for C10 server blades

2008-04-25T04:09:20+00:00

[ Minor coding style and whitespace corrections, also bump
  driver version and release date. -DaveM ]

Signed-off-by: Matheos Worku 
Signed-off-by: David S. Miller

niu: Determine the # of ports from the card's VPD data

2008-04-25T04:02:37+00:00

[ Fix minor whitespace and coding style stuff... -DaveM ]

Signed-off-by: Matheos Worku 
Signed-off-by: David S. Miller

[NIU]: Add Support for Sun ATCA Blade Server.

2008-02-29T05:25:43+00:00

Ports 0 and 1 of the NIU device are connected to extended fabric
through SERDES. Ports 2 and 3 are connected using RGMII Fiber mode.

[ Coding style cleanups... -DaveM ]

Signed-off-by: Matheos Worku 
Signed-off-by: David S. Miller