axienet_tx_poll(9)

📦 version 7.3.1, in nixpkgs unstable

💅 axienet_tx_poll(9) — or, the Kernel API Manual page your group chat has been waiting for

okay so bestie, we're in the Kernel API Manual today and this one is a whole little function about telling the network stack "hey, that packet actually went out, you can have your stuff back now" 🎀

✨ NAME ✨

axienet_tx_poll — gets called once a transmit is completed by the Axi DMA Tx channel. that's it, that's the vibe 💖

🌸 SYNOPSIS 🌸

int axienet_tx_poll (struct napi_struct *napi , int budget );

🦋 ARGUMENTS 🦋

  • napi — a pointer to the NAPI structure. yes bestie, an actual pointer, handle with care 🙈
  • budget — the max number of TX packets to process. it's giving "how much are we willing to do in one sitting" energy ⭐

👑 RETURN 👑

  • The number of TX packets processed. literally just the count, no drama 💅

🔥 DESCRIPTION 🔥

so this function gets invoked from the NAPI processing, right, and its whole job is to notify that the transmit operation is done 🔔

then it clears fields in the corresponding Tx BDs — yes, those BDs — and unmaps the corresponding buffer so that the CPU can regain ownership of the buffer. the CPU was waiting for its stuff back and now it's got it, we love a handoff 🫶

and finally, it invokes netif_wake_queue to restart transmission if required. if required, bestie. only then. no cap ✨

🌈 SEE ALSO 🌈

lowkey the longest friend list ever, and every single one of them is here:

and that's the whole page, bestie 💜 this lil icon came from ./drivers/net/ethernet/xilinx, dated October 2026 — go drink some water, you ate 🍓🧚

📦 where this page comes from