net: macb: Also set DMA coherent mask

macb: Add device tree properties that allow configuration of the AXI max pipeline register

net: macb: add support for ethtool interrupt moderation configuration

Only global throttling of rx or tx by time quanta is supported.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

macb: add platform device shutdown function. Prevents AXI master over PCIE from hanging when the host is rebooted.

net: macb: increase polling interval for MDIO completion

MDIO is a slow bus (single-digit MHz). Polling at 1us intervals
is a bit aggressive, so increase to 100us as the transaction
usually takes 100-200us to complete.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

net: macb: Several patches for RP1

64-bit RX fix

Also set DMA coherent mask

Add device tree properties that allow configuration of the AXI max
pipeline register

Add support for ethtool interrupt moderation configuration

Only global throttling of rx or tx by time quanta is supported.

Add platform device shutdown function. Prevents AXI master over PCIE
from hanging when the host is rebooted.

Increase polling interval for MDIO completion

MDIO is a slow bus (single-digit MHz). Polling at 1us intervals
is a bit aggressive, so increase to 100us as the transaction
usually takes 100-200us to complete.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

net: macb: Support the phy-reset-gpios property

Allow a PHY to be reset with an optional GPIO. The reset duration can
be specified in milliseconds - the default is 10ms.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

drivers: net: macb: close device on driver shutdown

Fix some suspicious locking and instead call into macb_close, which
deregisters and frees all resources the corresponding macb_open
claimed.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

net: macb: add hack to prevent TX stalls in a quiet system

See https://github.com/raspberrypi/linux-2712/issues/89



There is some critical window during TX where a further write to the
TSTART bit while TX is active does not cause newly queued TX descriptors
to be consumed.

For now "wait a bit, then try anyway" seems to work.

Requires further investigation, but this unsticks NFS reliably.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>

net: macb: set default interrupt moderation for GEM hardware

Defaulting to intmod = 0 is antisocial, as the MAC can generate over
130,000 interrupts per second. 50us is a sensible default.

Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>