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Message-ID: <20231214020530.2267499-1-almasrymina@google.com> 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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