dpaa2_io_query_bp_count(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dpaa2_io_query_bp_count(9) — kernel API manual, bestie edition 🎀

okay so this is a section 9 kernel API page (yes, the "9" in the header is the manual section, slay) and it's literally just about peeking at a buffer pool's population. tiny page, big main-character energy. let's go ✨

🌸 NAME 🌸

dpaa2_io_query_bp_count — ask a buffer pool how many buffers it's currently holding, no cap 💖

🦋 SYNOPSIS 🦋

int dpaa2_io_query_bp_count (struct dpaa2_io *d , u16 bpid , u32 *num );

so like… that's the whole vibe. three args, one int coming back at you 🫶

✨ ARGUMENTS ✨

  • d — the given DPIO object. your DPIO bestie that's gonna do the actual asking 💅
  • bpid — the index of the buffer pool you wanna query. like, which pool, girlies 🎀
  • num — the queried number of buffers in the buffer pool. this is where the answer lands 👑

🌈 DESCRIPTION 🌈

the deal is simple: it returns 0 for a successful query, and a negative error code if the query fails. that's it. that's the whole function. short and iconic 💀✨

ngl bestie, always check that return value — 0 means you ate, negative means something went sideways and num isn't gonna be your answer 😭

💜 SEE ALSO 💜

kernel file ./drivers/soc/fsl/dpio/dpio-service.c — the source, go read it iykyk 📖

and like, the whole friend group 🫶:

that's the whole page, bestie — short, sweet, and it ate 💅

sign-off szn: this lil drop lives in ./drivers/soc/fsl/dpio, dated October 2026. go forth and query those buffer pools 🦋💖 periodt.
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