dpaa2_io_service_register(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 dpaa2_io_service_register(9) — the Kernel API Manual glow-up 🌸

okay so bestie, we're in the Kernel API Manual today and this page is literally about getting your DPIO service ready to serve FQDAN or CDAN notifications 💅 like it's setting up the group chat before anyone even sends a message. iconic behavior honestly.

✨ NAME ✨

dpaa2_io_service_register — get everything prepped so your given DPIO service can actually service FQDAN or CDAN notifications 🦋

🎀 SYNOPSIS 🎀

int dpaa2_io_service_register (struct dpaa2_io *d , struct
dpaa2_io_notification_ctx *ctx , struct device *dev );

💖 ARGUMENTS 💖

  • d — the given DPIO service. your main character ✨
  • ctx — the notification context. the vibe-carrying details 🫶
  • dev — the device that requests the register. the one who's asking, respectfully 🙈

🌈 DESCRIPTION 🌈

so here's the tea, bestie: after this function completes successfully, the caller should go make the MC command that attaches a DPAA2 object to a DPIO. and the reason you do it in that order is genuinely a slay:

  • (a) The DPIO service is "ready" to handle a notification arrival — and yes, that notification might legitimately show up before the "attach" command to MC has returned control of execution back to the caller 😭 so like. the readiness has to be there first, no cap.
  • (b) The DPIO service can provide back to the caller the 'dpio_id' — and it needs to, in order for the object to be configured to produce the right notification fields to the DPIO service. iykyk 💫
lowkey the whole point: register first, attach after. don't flip it bestie, that's not the vibe 💀

Return 0 for success, or -ENODEV for failure. like, that's it. two outcomes and one of them is a little sad 😔

🦋 SEE ALSO 🦋

the whole friend group, fr fr:

and that's the whole page, bestie 🫶 this one lives in ./drivers/soc/fsl/dpio, it's dated October 2026, and it goes by dpaa2_io_service_register(9) — k bye, go register something, periodt 💅✨🎀

📦 where this page comes from