nfp_nfd3_tx_csum(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nfp_nfd3_tx_csum(9) — Kernel API Manual 🌸

okay so bestie, we're diving into nfp_nfd3_tx_csum today — it lives in the Kernel API Manual and honestly? it's giving tiny-but-essential. it does exactly one job and does it slay. ✨

🎀 NAME 🎀

nfp_nfd3_tx_csum — set those TX CSUM offload flags in the TX descriptor, periodt.

🦋 SYNOPSIS 🦋

void nfp_nfd3_tx_csum (struct nfp_net_dp *dp , struct nfp_net_r_vector
*r_vec , struct nfp_nfd3_tx_buf *txbuf , struct nfp_nfd3_tx_desc *txd ,
struct sk_buff *skb );

no return value, it's void, she just does the thing and leaves 💅

🌸 ARGUMENTS 🌸

  • dp — the NFP Net data path struct. main character energy, she's the config brain of the operation 🧠
  • r_vec — the per-ring structure. one of these per ring, living her best ring life 💍
  • txbuf — pointer to the driver soft TX descriptor. soft as in software, not soft as in fragile, don't worry 🫶
  • txd — pointer to the TX descriptor. this is the real one, the hardware-facing icon 👑
  • skb — pointer to the SKB. the packet itself, the moment, the whole point 🌟

💖 DESCRIPTION 💖

so what does she actually do? this function sets the TX checksum flags in the TX descriptor, and it figures them out from two things: the configuration and the protocol of the packet that's about to be transmitted. that's it. that's the whole vibe check. no cap, that's the entire job description 🔥

she reads the situation, she drops the right flags into txd, and she's out. not me being obsessed with a function this focused 😭

🌈 SEE ALSO 🌈

kernel file: ./drivers/net/ethernet/netronome/nfp/nfd3/dp.c

and the whole friend group, fr fr:

ngl bestie, if you're writing driver code around this, read the whole squad above — they all hang out in the same TX/RX ring ecosystem 💀

mwah, that's the page 🫶 this one's stamped ./drivers/net/ethernet/netrono... and dated October 2026 — so go forth, set those flags, and slay the checksum offload 💜✨

📦 where this page comes from