[OpenWrt-Devel] [RFC] lantiq: SMP interrupts and ethernet driver backport from vanilla v5

[Petr Cvek]

Hello,

I discovered the lantiq xrx200 lacks support for interrupts on secondary
VPE, and I've managed to add this functionality to the kernel, the
second icu controller lives on base address 0x1f880300 and works in the
same way as first. Tested with 4.14.93 kernel, untested patches in the
attachment or on openwrt forum:

https://forum.openwrt.org/t/xrx200-irq-balancing-between-vpes/29732/11

My second submission is a backported xrx200 ethernet driver from vanilla
kernel v5 patched with switch and phy functions. Using kernel napi
polling seems to highly increase the throughput of the network.

Trying to initially increase the throughput of the network I've found
there is an inefficiently setting of DMA burst size. My patch sets this
value to a higher value.

These two patches were tested with 4.14.93 kernel too, there is forum
thread:

https://forum.openwrt.org/t/how-can-we-make-the-lantiq-xrx200-devices-faster/9724/30

RFC for any parallel development info (next version of ethernet driver
will be based on vanilla kernel version?), ideas, testing ...

best regards,
Petr Cvek
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0901-add-icu-smp-support.patch
Type: text/x-patch
Size: 8051 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20190130/1dbd7ad4/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0902-enable-external-irqs-for-second-vpe.patch
Type: text/x-patch
Size: 368 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20190130/1dbd7ad4/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0903-add-icu1-node-for-smp.patch
Type: text/x-patch
Size: 749 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20190130/1dbd7ad4/attachment-0002.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0904-backport-vanilla-eth-driver.patch
Type: text/x-patch
Size: 24340 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20190130/1dbd7ad4/attachment-0003.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0905-increase-dma-burst-size.patch
Type: text/x-patch
Size: 506 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/openwrt-devel/attachments/20190130/1dbd7ad4/attachment-0004.bin>
-------------- next part --------------
_______________________________________________
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
https://lists.openwrt.org/mailman/listinfo/openwrt-devel