On Tue, 2019-07-30 at 12:13 +0200, Jesper Dangaard Brouer wrote: > On Mon, 29 Jul 2019 16:27:01 -0700 > Zvi Effron <zeffron@xxxxxxxxxxxxx> wrote: > > > Hello all, > > > > I was wondering if anyone knew if the upcoming 800 series Intel > > NICs > > with 100gbe support XDP? I don't yet see a new driver for them, but > > they may be reusing the i40e driver, or I may have missed it? If > > they > > do support it, do they maybe also support hardware mode (as opposed > > to > > driver mode)? > > Good to see that Intel customers are requesting XDP support, for new > HW > and associated drivers. > > AFAIK Linux kernel driver is called ICE for Intel 800 series NIC[1] > (which supports 100/50/25/10 Gbit/s Ethernet). (p.s. I don't have > this > hardware in my testlab). > > It is located in the kernel tree[2]: drivers/net/ethernet/intel/ice/. > Reading and grepping the code for 'xdp', reveals that this driver > doesn't support XDP. So, I guess you need to buy your 100G hardware > from another vendor, or convince Intel to add XDP support. We had pushed patches that add XDP and AF_XDP support for ice to Jeff Kirsher's next-queue tree (links below), but it appears that some rework is required before we can push it to net-next. This is being worked on right now. https://patchwork.ozlabs.org/patch/1123016/ https://patchwork.ozlabs.org/patch/1123017/ Please note that the above patches are for reference only. Final patches will be posted when available. Best, Ani > > > Code details: Strangely it looks like this driver always does a > memcpy > of the headers into linear part of a 256 bytes SKB, and attach the > payload as a SKB "fragment". (I wonder why this was chosen?) > It should still be easy to add a XDP step before doing this (in > ice_clean_rx_irq() just after call to ice_get_rx_buf()) > > > [1] > https://www.intel.com/content/www/us/en/architecture-and-technology/ethernet/introducing-800-series.html > [2] > https://github.com/torvalds/linux/tree/master/drivers/net/ethernet/intel/ice
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