[PATCH RFC net-next 00/34] Christmas 3-serie XDP for idpf (+generic stuff)

From: Alexander Lobakin
Date: Fri Dec 22 2023 - 21:58:26 EST

I was highly asked to send this WIP before the holidays to trigger
some discussions at least for the generic parts.

This all depends on libie[0] and WB-on-ITR fix[1]. The RFC does not
guarantee to work perfectly, but at least regular XDP seems to work
for me...

In fact, here are 3 separate series:
* 01-08: convert idpf to libie and make it more sane;
* 09-25: add XDP to idpf;
* 26-34: add XSk to idpf.

Most people may want to be interested only in the following generic
changes:
* 11: allow attaching already registered memory models to XDP RxQ info;
* 12-13: generic helpers for adding a frag to &xdp_buff and converting
it to an skb;
* 14: get rid of xdp_frame::mem.id, allow mixing pages from different
page_pools within one &xdp_buff/&xdp_frame;
* 15: some Page Pool helper;
* 18: it's for libie, but I wanted to talk about XDP_TX bulking;
* 26: same as 13, but for converting XSK &xdp_buff to skb.

The rest is up to you, driver-specific stuff is pretty boring sometimes.

I'll be polishing and finishing this all starting January 3rd and then
preparing and sending sane series, some early feedback never hurts tho.

Merry Yule!

[0] https://lore.kernel.org/netdev/20231213112835.2262651-1-aleksander.lobakin@xxxxxxxxx
[1] https://lore.kernel.org/netdev/20231215193721.425087-1-michal.kubiak@xxxxxxxxx

Alexander Lobakin (23):
idpf: reuse libie's definitions of parsed ptype structures
idpf: pack &idpf_queue way more efficiently
idpf: remove legacy Page Pool Ethtool stats
libie: support different types of buffers for Rx
idpf: convert header split mode to libie + napi_build_skb()
idpf: use libie Rx buffer management for payload buffer
libie: add Tx buffer completion helpers
idpf: convert to libie Tx buffer completion
bpf, xdp: constify some bpf_prog * function arguments
xdp: constify read-only arguments of some static inline helpers
xdp: allow attaching already registered memory model to xdp_rxq_info
xdp: add generic xdp_buff_add_frag()
xdp: add generic xdp_build_skb_from_buff()
xdp: get rid of xdp_frame::mem.id
page_pool: add inline helper to sync VA for device (for XDP_TX)
jump_label: export static_key_slow_{inc,dec}_cpuslocked()
libie: support native XDP and register memory model
libie: add a couple of XDP helpers
idpf: stop using macros for accessing queue descriptors
idpf: use generic functions to build xdp_buff and skb
idpf: add support for XDP on Rx
idpf: add support for .ndo_xdp_xmit()
xdp: add generic XSk xdp_buff -> skb conversion

Michal Kubiak (11):
idpf: make complq cleaning dependent on scheduling mode
idpf: prepare structures to support xdp
idpf: implement XDP_SETUP_PROG in ndo_bpf for splitq
idpf: add support for sw interrupt
idpf: add relative queue id member to idpf_queue
idpf: add vc functions to manage selected queues
idpf: move search rx and tx queues to header
idpf: add XSk pool initialization
idpf: implement Tx path for AF_XDP
idpf: implement Rx path for AF_XDP
idpf: enable XSk features and ndo_xsk_wakeup

.../net/ethernet/freescale/dpaa/dpaa_eth.c | 2 +-
drivers/net/ethernet/intel/Kconfig | 3 +-
drivers/net/ethernet/intel/idpf/Makefile | 3 +
drivers/net/ethernet/intel/idpf/idpf.h | 91 +-
drivers/net/ethernet/intel/idpf/idpf_dev.c | 3 +
.../net/ethernet/intel/idpf/idpf_ethtool.c | 74 +-
.../net/ethernet/intel/idpf/idpf_lan_txrx.h | 6 +-
drivers/net/ethernet/intel/idpf/idpf_lib.c | 40 +-
drivers/net/ethernet/intel/idpf/idpf_main.c | 1 +
.../ethernet/intel/idpf/idpf_singleq_txrx.c | 221 ++-
drivers/net/ethernet/intel/idpf/idpf_txrx.c | 1142 ++++++++--------
drivers/net/ethernet/intel/idpf/idpf_txrx.h | 451 +++----
drivers/net/ethernet/intel/idpf/idpf_vf_dev.c | 3 +
.../net/ethernet/intel/idpf/idpf_virtchnl.c | 1132 ++++++++++------
drivers/net/ethernet/intel/idpf/idpf_xdp.c | 522 ++++++++
drivers/net/ethernet/intel/idpf/idpf_xdp.h | 38 +
drivers/net/ethernet/intel/idpf/idpf_xsk.c | 1181 +++++++++++++++++
drivers/net/ethernet/intel/idpf/idpf_xsk.h | 30 +
drivers/net/ethernet/intel/libie/Makefile | 3 +
drivers/net/ethernet/intel/libie/rx.c | 135 +-
drivers/net/ethernet/intel/libie/tx.c | 16 +
drivers/net/ethernet/intel/libie/xdp.c | 50 +
drivers/net/ethernet/intel/libie/xsk.c | 49 +
drivers/net/veth.c | 4 +-
include/linux/bpf.h | 12 +-
include/linux/filter.h | 9 +-
include/linux/net/intel/libie/rx.h | 25 +-
include/linux/net/intel/libie/tx.h | 94 ++
include/linux/net/intel/libie/xdp.h | 586 ++++++++
include/linux/net/intel/libie/xsk.h | 172 +++
include/linux/netdevice.h | 6 +-
include/linux/skbuff.h | 14 +-
include/net/page_pool/helpers.h | 32 +
include/net/page_pool/types.h | 6 +-
include/net/xdp.h | 109 +-
kernel/bpf/cpumap.c | 2 +-
kernel/bpf/devmap.c | 8 +-
kernel/jump_label.c | 2 +
net/bpf/test_run.c | 6 +-
net/core/dev.c | 8 +-
net/core/filter.c | 27 +-
net/core/page_pool.c | 31 +-
net/core/xdp.c | 189 ++-
43 files changed, 4971 insertions(+), 1567 deletions(-)
create mode 100644 drivers/net/ethernet/intel/idpf/idpf_xdp.c
create mode 100644 drivers/net/ethernet/intel/idpf/idpf_xdp.h
create mode 100644 drivers/net/ethernet/intel/idpf/idpf_xsk.c
create mode 100644 drivers/net/ethernet/intel/idpf/idpf_xsk.h
create mode 100644 drivers/net/ethernet/intel/libie/tx.c
create mode 100644 drivers/net/ethernet/intel/libie/xdp.c
create mode 100644 drivers/net/ethernet/intel/libie/xsk.c
create mode 100644 include/linux/net/intel/libie/tx.h
create mode 100644 include/linux/net/intel/libie/xdp.h
create mode 100644 include/linux/net/intel/libie/xsk.h

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2.43.0