[PATCH 0/7] net: ethernet: ti: cpsw: support placing CPDMA descriptors into DDR

Grygorii Strashko
2016-12-01T23:34:25Z

This series intended to add support for placing CPDMA descriptors into DDR by
introducing new DT property "descs_pool_size" to specify buffer descriptor's
pool size. The "descs_pool_size" defines total number of CPDMA
CPPI descriptors to be used for both ingress/egress packets
processing. If not specified - the default value 256 will be used
which will allow to place descriptor's pool into the internal CPPI
RAM.

This allows significantly to reduce UDP packets drop rate
for bandwidth >301 Mbits/sec (am57x).

Before enabling this feature, the am437x SoC has to be fixed as it's proved
that it's not working when CPDMA descriptors placed in DDR.
So, the patch 1 fixes this issue.

Grygorii Strashko (7):
net: ethernet: ti: cpdma: am437x: allow descs to be plased in ddr
net: ethernet: ti: cpdma: fix desc re-queuing
net: ethernet: ti: cpdma: minimize number of parameters in
cpdma_desc_pool_create/destroy()
net: ethernet: ti: cpdma: use devm_ioremap
Documentation: DT: net: cpsw: allow to specify descriptors pool size
net: ethernet: ti: cpsw: add support for descs_pool_size dt property
Documentation: DT: net: cpsw: remove no_bd_ram property

Documentation/devicetree/bindings/net/cpsw.txt | 8 ++-
arch/arm/boot/dts/am33xx.dtsi | 1 -
arch/arm/boot/dts/am4372.dtsi | 1 -
arch/arm/boot/dts/dm814x.dtsi | 1 -
arch/arm/boot/dts/dra7.dtsi | 1 -
drivers/net/ethernet/ti/cpsw.c | 5 ++
drivers/net/ethernet/ti/cpsw.h | 1 +
drivers/net/ethernet/ti/davinci_cpdma.c | 90 +++++++++++++++-----------
drivers/net/ethernet/ti/davinci_cpdma.h | 1 +
9 files changed, 63 insertions(+), 46 deletions(-)

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2.10.1