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Date: Wed, 13 Dec 2023 18:05:23 -0800
From: Mina Almasry <almasrymina@...gle.com>
To: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
bpf@...r.kernel.org
Cc: Mina Almasry <almasrymina@...gle.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Sumit Semwal <sumit.semwal@...aro.org>,
"Christian König" <christian.koenig@....com>,
Michael Chan <michael.chan@...adcom.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Wei Fang <wei.fang@....com>,
Shenwei Wang <shenwei.wang@....com>,
Clark Wang <xiaoning.wang@....com>,
NXP Linux Team <linux-imx@....com>,
Jeroen de Borst <jeroendb@...gle.com>,
Praveen Kaligineedi <pkaligineedi@...gle.com>,
Shailend Chand <shailend@...gle.com>,
Yisen Zhuang <yisen.zhuang@...wei.com>,
Salil Mehta <salil.mehta@...wei.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Marcin Wojtas <mw@...ihalf.com>,
Russell King <linux@...linux.org.uk>,
Sunil Goutham <sgoutham@...vell.com>,
Geetha sowjanya <gakula@...vell.com>,
Subbaraya Sundeep <sbhatta@...vell.com>,
hariprasad <hkelam@...vell.com>, Felix Fietkau <nbd@....name>,
John Crispin <john@...ozen.org>,
Sean Wang <sean.wang@...iatek.com>,
Mark Lee <Mark-MC.Lee@...iatek.com>,
Lorenzo Bianconi <lorenzo@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Saeed Mahameed <saeedm@...dia.com>,
Leon Romanovsky <leon@...nel.org>,
Horatiu Vultur <horatiu.vultur@...rochip.com>,
UNGLinuxDriver@...rochip.com,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
Jassi Brar <jaswinder.singh@...aro.org>,
Ilias Apalodimas <ilias.apalodimas@...aro.org>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Siddharth Vadapalli <s-vadapalli@...com>,
Ravi Gunasekaran <r-gunasekaran@...com>,
Roger Quadros <rogerq@...nel.org>,
Jiawen Wu <jiawenwu@...stnetic.com>,
Mengyuan Lou <mengyuanlou@...-swift.com>,
Ronak Doshi <doshir@...are.com>,
VMware PV-Drivers Reviewers <pv-drivers@...are.com>,
Ryder Lee <ryder.lee@...iatek.com>,
Shayne Chen <shayne.chen@...iatek.com>,
Kalle Valo <kvalo@...nel.org>, Juergen Gross <jgross@...e.com>,
Stefano Stabellini <sstabellini@...nel.org>,
Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <martin.lau@...ux.dev>,
Song Liu <song@...nel.org>,
Yonghong Song <yonghong.song@...ux.dev>,
KP Singh <kpsingh@...nel.org>,
Stanislav Fomichev <sdf@...gle.com>,
Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
Stefan Hajnoczi <stefanha@...hat.com>,
Stefano Garzarella <sgarzare@...hat.com>,
Shuah Khan <shuah@...nel.org>,
"Mickaël Salaün" <mic@...ikod.net>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Bill Wendling <morbo@...gle.com>,
Justin Stitt <justinstitt@...gle.com>,
Jason Gunthorpe <jgg@...dia.com>,
Shakeel Butt <shakeelb@...gle.com>,
Yunsheng Lin <linyunsheng@...wei.com>,
Willem de Bruijn <willemdebruijn.kernel@...il.com>
Subject: [RFC PATCH net-next v1 0/4] Abstract page from net stack
Currently these components in the net stack use the struct page
directly:
1. Drivers.
2. Page pool.
3. skb_frag_t.
To add support for new (non struct page) memory types to the net stack, we
must first abstract the current memory type.
Originally the plan was to reuse struct page* for the new memory types,
and to set the LSB on the page* to indicate it's not really a page.
However, for safe compiler type checking we need to introduce a new type.
struct netmem is introduced to abstract the underlying memory type.
Currently it's a no-op abstraction that is always a struct page underneath.
In parallel there is an undergoing effort to add support for devmem to the
net stack:
https://lore.kernel.org/netdev/20231208005250.2910004-1-almasrymina@google.com/
Cc: Jason Gunthorpe <jgg@...dia.com>
Cc: Christian König <christian.koenig@....com>
Cc: Shakeel Butt <shakeelb@...gle.com>
Cc: Yunsheng Lin <linyunsheng@...wei.com>
Cc: Willem de Bruijn <willemdebruijn.kernel@...il.com>
Mina Almasry (4):
vsock/virtio: use skb_frag_page() helper
net: introduce abstraction for network memory
net: add netmem_t to skb_frag_t
net: page_pool: use netmem_t instead of struct page in API
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 ++--
drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 8 ++-
drivers/net/ethernet/engleder/tsnep_main.c | 22 +++---
drivers/net/ethernet/freescale/fec_main.c | 33 ++++++---
.../net/ethernet/hisilicon/hns3/hns3_enet.c | 14 ++--
drivers/net/ethernet/intel/idpf/idpf_txrx.c | 2 +-
drivers/net/ethernet/intel/idpf/idpf_txrx.h | 15 ++--
drivers/net/ethernet/marvell/mvneta.c | 24 ++++---
.../net/ethernet/marvell/mvpp2/mvpp2_main.c | 18 +++--
.../marvell/octeontx2/nic/otx2_common.c | 8 ++-
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 22 +++---
.../net/ethernet/mellanox/mlx5/core/en/xdp.c | 27 ++++---
.../net/ethernet/mellanox/mlx5/core/en_rx.c | 28 ++++----
.../ethernet/microchip/lan966x/lan966x_fdma.c | 16 +++--
drivers/net/ethernet/microsoft/mana/mana_en.c | 10 +--
drivers/net/ethernet/socionext/netsec.c | 25 ++++---
.../net/ethernet/stmicro/stmmac/stmmac_main.c | 48 ++++++++-----
drivers/net/ethernet/ti/cpsw.c | 11 +--
drivers/net/ethernet/ti/cpsw_new.c | 11 +--
drivers/net/ethernet/ti/cpsw_priv.c | 12 ++--
drivers/net/ethernet/wangxun/libwx/wx_lib.c | 18 +++--
drivers/net/veth.c | 5 +-
drivers/net/vmxnet3/vmxnet3_drv.c | 7 +-
drivers/net/vmxnet3/vmxnet3_xdp.c | 20 +++---
drivers/net/wireless/mediatek/mt76/dma.c | 4 +-
drivers/net/wireless/mediatek/mt76/mt76.h | 5 +-
.../net/wireless/mediatek/mt76/mt7915/mmio.c | 4 +-
drivers/net/xen-netfront.c | 4 +-
include/linux/skbuff.h | 11 ++-
include/net/netmem.h | 35 +++++++++
include/net/page_pool/helpers.h | 72 ++++++++++---------
include/net/page_pool/types.h | 9 +--
net/bpf/test_run.c | 2 +-
net/core/page_pool.c | 39 +++++-----
net/core/skbuff.c | 2 +-
net/core/xdp.c | 3 +-
net/kcm/kcmsock.c | 9 ++-
net/vmw_vsock/virtio_transport.c | 2 +-
38 files changed, 381 insertions(+), 239 deletions(-)
create mode 100644 include/net/netmem.h
--
2.43.0.472.g3155946c3a-goog
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