idpf_txq_has_room(9)

📦 version 7.3.1, in nixpkgs unstable

💅 idpf_txq_has_room — a Kernel API Manual moment

okay bestie, so this is a page from the Kernel API Manual (that's the manual name, we're fancy like that ✨) and it's all about idpf_txq_has_room. literally the vibe check for whether your Tx splitq has room for the packet you're about to yeet at it. 🦋

✨ NAME ✨

idpf_txq_has_room — check if enough Tx splitq resources are available

no cap, that's the whole job. it peek at the queue and goes "yeah you got room" or "nope bestie, not today." 💅

🌸 SYNOPSIS 🌸

int idpf_txq_has_room (struct idpf_tx_queue *tx_q , u32 descs_needed ,
u32 bufs_needed );

she takes three things and gives you back an int. iconic signature tbh. 🎀

💖 ARGUMENTS 💖

  • tx_q — the queue to be checked. like, this is the queue, the main character of this whole function. 👑
  • descs_needed — number of descriptors required for this packet. count 'em. that's how many descriptors your packet is asking for. 🍓
  • bufs_needed — number of Tx buffers required for this packet. same energy, but for buffers this time. 🧚

🔥 RETURN 🔥

  • 0 if no room available 😭
  • 1 otherwise 🎉

fr fr that's it — 0 means nope, 1 means slay, go ahead. note that 0 is the "no room" answer here, so do NOT treat it as success, i'm begging you. 💀

💜 SEE ALSO 💜

first up, the kernel file this lives in — go read the real thing, iykyk:

./drivers/net/ethernet/intel/idpf/idpf_txrx.c

and now, the extended family (yes, all of them, i'm not skipping a single one 🫶):

like. that's a whole friend group and every single one of them is invited. 🌈

and that's the page, bestie! 🫶 this one came out of ./drivers/net/ethernet/intel/idpf — October 2026 edition — so if you're reading it in some other timeline, check your source tree. mwah 💋⭐

📦 where this page comes from