XDP for idpf is currently 5.(6) chapters:
* convert Rx to libeth;
* convert Tx and stats to libeth;
* generic XDP and XSk code changes;
* generic XDP and XSk code additions pt. 1;
* generic XDP and XSk code additions pt. 2 (you are here);
* actual XDP for idpf via new libeth_xdp;
* XSk for idpf (via ^).
Part III.3 does the following:
* adds generic functions to build skbs from xdp_buffs (regular and
XSk) and attach frags to xdp_buffs (regular and XSk);
* adds helper to optimize XSk xmit in drivers;
* add generic loop unroll hint macros.
Everything is prereq for libeth_xdp, but will be useful standalone
as well: less code in drivers, faster XSk XDP_PASS, smaller object
code.
Alexander Lobakin (7):
page_pool: add page_pool_dev_alloc_netmem()
xdp: add generic xdp_buff_add_frag()
xdp: add generic xdp_build_skb_from_buff()
xsk: make xsk_buff_add_frag() really add the frag via
__xdp_buff_add_frag()
xsk: add generic XSk &xdp_buff -> skb conversion
xsk: add helper to get &xdp_desc's DMA and meta pointer in one go
unroll: add generic loop unroll helpers
include/linux/skbuff.h | 16 +-
include/linux/unroll.h | 44 +++++
include/net/page_pool/helpers.h | 9 ++
include/net/xdp.h | 98 +++++++++++-
include/net/xdp_sock_drv.h | 41 ++++-
include/net/xsk_buff_pool.h | 8 +
drivers/net/ethernet/intel/i40e/i40e_xsk.c | 30 +---
drivers/net/ethernet/intel/ice/ice_xsk.c | 32 +---
net/core/xdp.c | 178 +++++++++++++++++++++
net/xdp/xsk_buff_pool.c | 40 +++++
10 files changed, 431 insertions(+), 65 deletions(-)
---
Each patch except trivial 0001 was on the lists already.
Since the not applied part of Chapter III.2:
* rebase on top of Mina's netmem fixes;
* 0003: remove redundant double CONFIG_PAGE_POOL check (one inside
and another one outside of skb_mark_for_recycle()) (Jakub);
* 0005: remove !CONFIG_PAGE_POOL code as unreachable (eBPF always
selects it) (also Jakub);
* 0005: actually check the pfmemalloc flag of newly allocated frags;
* drop exporting static_key_{inc,dec}_cpuslocked() -- were used on
slowpath in very unlikely case where saving a few cycles looked
worse and less convienient than the "regular" way.
--
2.47.1
