pdc_rings_full(9)

📦 version 7.3.1, in nixpkgs unstable

Hiii bestie 💖 welcome to the pdc_rings_full(9) page — yes, that’s the Kernel API Manual, and she’s here to do a tiny ring vibe check. No cap, this is all about checking whether the tx ring has room for tx_cnt descriptors and the rx ring has room for rx_cnt descriptors.

🎀 NAME 🎀

pdc_rings_full — check whether the tx ring has room for tx_cnt descriptors and the rx ring has room for rx_cnt descriptors.

✨ SYNOPSIS ✨

The whole signature, character for character:

bool pdc_rings_full (struct pdc_state *pdcs , int tx_cnt , int rx_cnt );

💅 ARGUMENTS 💅

  • pdcs — PDC state. The main character struct, basically 🫶.
  • tx_cnt — the number of descriptors required in the tx ring.
  • rx_cnt — the number of descriptors required in the rx ring. (The og page has a tiny i typo here — “required i the rx ring” — but the meaning is exactly this 💀💅.)

🔥 RETURN 🔥

  • true — if one of the rings does not have enough space.
  • false — if sufficient space is available in both rings.

🌈 SEE ALSO 🌈

Kernel file: ./drivers/mailbox/bcm-pdc-mailbox.c — plus the whole squad:

xoxo from the pdc_rings_full(9) page, ./drivers/mailbox 💖 October 2026 🎀

📦 where this page comes from