qbman_swp_CDAN_set_context(9)

📦 version 7.3.1, in nixpkgs unstable

💅 qbman_swp_CDAN_set_context — a kernel API manual moment

okay so bestie, welcome to the Kernel API Manual page for qbman_swp_CDAN_set_context(9) — yes that's the whole title and yes we're saying it with our chest. It lives in the DPIO / QBMan portal corner of the kernel and it's lowkey one of those tiny glue functions that just works. ✨

✨ NAME ✨

qbman_swp_CDAN_set_context — Set CDAN context 🎀 that's it, that's the job.

🌸 SYNOPSIS 🌸

int qbman_swp_CDAN_set_context (struct qbman_swp *s , u16 channelid ,
       u64 ctx );

So you call it, you hand it a portal, a channel index, and a context value, and it goes and does the thing. Slay. 💅

🦋 ARGUMENTS 🦋

  • s — the software portal object, aka your main character pointer. It's the struct qbman_swp * you already have kicking around.
  • channelid — the channel index, a u16. Iconic little number, tells us which channel we're talking about.
  • ctx — the context to be set in CDAN, a u64. This is literally just the value you're shoving in there.

💜 DESCRIPTION 💜

Not me writing the shortest description ever, but fr fr: it returns 0 for success, or a negative error code for failure. That's the whole vibe check — no extra lore, no secret options, no hidden defaults. If you get 0 back, we're slaying; if it's negative, something's giving error energy and you should handle it. 😭

ngl there are zero extra params here — no env vars, no file paths, no signals. Just the return value. Periodt. 🫶

🌈 SEE ALSO 🌈

Kernel file ./drivers/soc/fsl/dpio/qbman-portal.h — go read it, it's giving source of truth energy 👑

And then the whole bestie lineup, all of them, in order:

okay bestie, cute little sign-off time 🎀 this page hangs out under ./drivers/soc/fsl/dpio, it's dated October 2026, and it's from the Kernel API Manual — that's the whole vibe. Now go set that context and slay the queue 💖🦋✨

📦 where this page comes from