From: Grygorii Strashko <grygorii.stras...@ti.com> Date: Fri, 6 Jan 2017 14:07:28 -0600
> 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. Series applied to net-next, thanks.
