ntb_peer_db_read(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ntb_peer_db_read(9) — Kernel API Manual

okay so bestie, this whole page is about one little function: ntb_peer_db_read, and it lives in the Kernel API Manual. That's it. That's the whole vibe. Let's get into it ✨

🌸 NAME 🌸

ntb_peer_db_read — read the peer doorbell register 🔔

Like, you know how a doorbell tells you someone's at the door? Same energy, but for NTB hardware. Except here you're peeking at the peer's doorbell register. Ngl, kind of nosy of you. Love that for us 🫶

🎀 SYNOPSIS 🎀

u64 ntb_peer_db_read (struct ntb_dev *ntb );

Copy it exactly, don't @ me. The return type is u64, the arg is a struct ntb_dev * named ntb, and yes there's a space before that closing paren. That's just how it is 💀

🦋 ARGUMENTS 🦋

  • ntb — the NTB device context. Like, the actual device you're talking to. You can't just vibe-check a doorbell with no device, babe.

✨ DESCRIPTION ✨

Okay so here's the tea ☕: this function reads the peer doorbell register, and it gives you back the bits that are set. That's the whole thing. Bits in, bits out, slay.

but like… heads up 👀 — this one is unusual, and the hardware may not support it. So don't come crying to me if it doesn't work on your setup. It's giving "unsupported, bestie." Check your hardware first, fr fr.

💖 RETURN 💖

It returns the bits currently set in the peer doorbell register. That's your answer. Those bits. Those exact bits. Iconic 🌈

👑 SEE ALSO 👑

Kernel file ./include/linux/ntb.h — plus, like, the entire extended NTB friend group 😭 every single one of them, no cap:

Like, the whole function family reunion 😭 go say hi to all of them, they're all in ./include/linux/ntb.h, mwah 💜

k bye bestie, that's the page 🫶 this little number came from ./include/linux and it's dated October 2026, and it's filed under ntb_peer_db_read(9) — go read some bits, love u, periodt 💅✨

📦 where this page comes from