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. 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 -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
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