From: David S. Miller Date: Mon, 13 Mar 2017 06:43:20 +0000 (-0700) Subject: Merge branch 'nfp-xdp_adjust_head' X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=d1523099419990fce4360e828d5d0120360ad7ae;p=openwrt%2Fstaging%2Fblogic.git Merge branch 'nfp-xdp_adjust_head' Jakub Kicinski says: ==================== nfp: XDP adjust head support This series adds support for XDP adjust head. Bulk of the code is actually just paying technical debt. On reconfiguration request nfp was allocating new resources separately leaving device running with the existing set of rings. We used to manage the new resources in special ring set structures. This set is simply separating the datapath part of the device structure from the control information allowing the new datapath structure to be allocated with all new memory and rings. The swap operation is now greatly simplified. We also save a lot of parameter passing this way. Hopefully the churn is worth the negative diffstat. Support for XDP adjust head is done in a pretty standard way. NFP is a bit special because it prepends metadata before packet data so we have to do a bit of memcpying in case XDP will run. We also luck out a little bit because the fact that we already have prepend space allocated means that one byte is enough to store the extra XDP space (256 of standard prepend space is a bit inconvenient since it would normally require 16bits or boolean with additional shifts). ==================== Signed-off-by: David S. Miller --- d1523099419990fce4360e828d5d0120360ad7ae