From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grygorii Strashko Subject: [PATCH v2 0/7] net: ethernet: ti: cpsw: support placing CPDMA descriptors into DDR Date: Fri, 6 Jan 2017 14:07:28 -0600 Message-ID: <20170106200735.4210-1-grygorii.strashko@ti.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Sekhar Nori , , , Grygorii Strashko To: "David S. Miller" , , Mugunthan V N , Ivan Khoronzhuk Return-path: Received: from lelnx194.ext.ti.com ([198.47.27.80]:36923 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S937961AbdAFUHk (ORCPT ); Fri, 6 Jan 2017 15:07:40 -0500 Sender: netdev-owner@vger.kernel.org List-ID: This series intended to add support for placing CPDMA descriptors into DDR by introducing new module parameter "descs_pool_size" to specify size of descriptor's pool. 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. In addition, added ability to re-split CPDMA pool of descriptors between RX and TX path via ethtool '-G' command wich will allow to configure and fix number of descriptors used by RX and TX path, which, then, will be split between RX/TX channels proportionally depending on number of RX/TX channels and its weight. 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 net: ethernet: ti: cpsw: add support for descs pool size configuration net: ethernet: ti: cpsw: add support for ringparam configuration Documentation: DT: net: cpsw: remove no_bd_ram property Documentation/devicetree/bindings/net/cpsw.txt | 3 - 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 | 98 ++++++++++++++- drivers/net/ethernet/ti/davinci_cpdma.c | 161 +++++++++++++++---------- drivers/net/ethernet/ti/davinci_cpdma.h | 5 + 8 files changed, 199 insertions(+), 72 deletions(-) -- 2.10.1.dirty