am65_cpts_prep_tx_timestamp(9)

📦 version 7.3.1, in nixpkgs unstable

💖 am65_cpts_prep_tx_timestamp — the Kernel API Manual glow-up 💖

okay bestie, so this one lives in the Kernel API Manual, and it's giving "tiny function, huge responsibilities" energy. It's am65_cpts_prep_tx_timestamp, and no cap, it's the little pre-flight check your TX packet goes through before the hardware gets its timestamp on. ✨

🌸 NAME 🌸

am65_cpts_prep_tx_timestamp — checks a tx packet and gets it all prepped for timestamping. That's literally the whole job description, and she does it flawlessly. 💅

🦋 SYNOPSIS 🦋

void am65_cpts_prep_tx_timestamp (struct am65_cpts *cpts , unsigned int
port_id , struct sk_buff *skb );

Returns nothing (it's void, she's humble like that) — she just does the work and ghosts. 👑

🎀 ARGUMENTS 🎀

  • cpts — your cpts handle. The main character of this whole saga, iykyk. 🫶
  • port_id — the port the skb is gonna be sent out on. Gotta know which door she's exiting through. 🚪
  • skb — the packet itself. The whole reason we're here. 📦

✨ DESCRIPTION ✨

okay so listen — this function is supposed to be called from .xmit, that's her designated hangout spot, no negotiating. 🎯

When she runs, she does a whole little routine:

  1. She checks whether the packet can actually be timestamped in the first place — vibe check on the packet, basically. 🙈
  2. If it passes, she fills in the internal cpts data in skb-cb — that's the skb control buffer, her little hideaway for bookkeeping. 🍓
  3. Then she marks the packet as SKBTX_IN_PROGRESS so everyone downstream knows the timestamp situation is handled and in flight. 🔥
ngl she's doing three things at once and making it look effortless — that's main character energy, periodt. 💜

🌈 SEE ALSO 🌈

  • The kernel file you'll wanna peek at: ./drivers/net/ethernet/ti/am65-cpts.c — go read her home base, bestie, it's all there. 📖
  • am65_cpts_tx_timestamp(9) — her sibling, the one who actually handles the timestamp part. Family business fr fr. 👯

and that's the whole page, bestie — no filler, all facts, ate and left no crumbs. 🧚

signed, sealed, delivered from ./drivers/net/ethernet/ti, dated October 2026, tagged am65_cpts_prep_tx_timestamp(9) — mwah, slay, bye! 💋💖

📦 where this page comes from