Wen Gong <wgong@xxxxxxxxxxxxxx> wrote: > For sdio chip, it is high latency bus, all the TX packet's content will > be tranferred from HOST memory to firmware memory via sdio bus, then it > need much more memory in firmware than low latency bus chip, for low > latency chip, such as PCI-E, it only need to transfer the TX descriptor > via PCI-E bus to firmware memory. For sdio chip, reduce the complexity of > TX logic will help TX efficiency since its memory is limited, and it will > reduce the TX circle's time of each packet and then firmware will have more > memory for TX since TX complete also need memeory. > > This patch disable TX complete indication from firmware for htt data > packet, it will not have TX complete indication from firmware to ath10k. > It will cut the cost of bus bandwidth of TX complete and make the TX > logic of firmware simpler, it results in significant performance > improvement on TX path. > > Udp TX throughout is 130Mbps without this patch, and it arrives > 400Mbps with this patch. > > The downside of this patch is the command "iw wlan0 station dump" will > show 0 for "tx retries" and "tx failed" since all tx packet's status > is success. > > This patch only effect sdio chip, it will not effect PCI, SNOC etc. > > Tested with QCA6174 SDIO with firmware > WLAN.RMH.4.4.1-00017-QCARMSWPZ-1 > > Signed-off-by: Wen Gong <wgong@xxxxxxxxxxxxxx> > Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> 2 patches applied to ath-next branch of ath.git, thanks. d81686d33356 ath10k: disable TX complete indication of htt for sdio c61a74837043 ath10k: change ATH10K_SDIO_BUS_REQUEST_MAX_NUM from 64 to 1024 -- https://patchwork.kernel.org/patch/11377827/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
