From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grygorii Strashko Subject: [PATCH 0/7] net: ethernet: ti: cpsw: support placing CPDMA descriptors into DDR Date: Thu, 1 Dec 2016 17:34:25 -0600 Message-ID: <20161201233432.6182-1-grygorii.strashko@ti.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Sekhar Nori , , , Ivan Khoronzhuk , Grygorii Strashko To: "David S. Miller" , , Mugunthan V N Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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(-) -- 2.10.1