ixgbe_ptp_read_X550(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ixgbe_ptp_read_X550 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function with a big job, and honestly? she ate.

✨ NAME ✨

ixgbe_ptp_read_X550 — read cycle counter value 🎀

🌸 SYNOPSIS 🌸

u64 ixgbe_ptp_read_X550 (struct cyclecounter *cc );

like, that's it. that's the whole vibe check. a u64 comes out, a struct cyclecounter * goes in 🦋

🫶 ARGUMENTS 🫶

  • cc — the cyclecounter structure, bestie. she's the main character here 💅

👑 DESCRIPTION 👑

okay so here's the tea ☕ this function reads the SYSTIME registers. no cap.

she gets called by the cyclecounter structure to convert from internal representation into nanoseconds — it's giving translator energy, honestly 🌈

and listen, we need this for X550 specifically (iykyk) because some skews do not have expected clock frequency 😭 and the result of SYSTIME is 32 bits of "billions of cycles" and 32 bits of "cycles" — not the usual seconds-and-nanoseconds situation. so yeah, the math is different, and that's exactly why this function exists. periodt 💀✨

🦋 SEE ALSO 🦋

first up, the actual kernel file, iconic:

./drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c 📁

and then her whole friend group, fr fr — every single one of them:

like, the whole squad showed up 🫶 go read them too, bestie, they're all lowkey obsessed with timestamps.

k bye ily, go read some registers 💖

this lil page came from ./drivers/net/ethernet/intel/i... and it's dated October 2026 — screenshot it, frame it, whatever, it's iconic 🌟🎀

📦 where this page comes from