STRUCT RIO_DBELL(9)

🦋 struct rio_dbell(9) — RIO doorbell event 🦋

Okay bestie, so this is a page from the Kernel API Manual, and it's literally all about struct rio_dbell — the RIO doorbell event. Yes, "doorbell." Like someone ringing to say "hey, something happened," except it's RapidIO and it's a struct. Iconic. 🔔💖

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✨ SYNOPSIS ✨

Here's the whole thing, no cap — this is the exact shape of it:

struct rio_dbell {
    struct list_head node;
    struct resource *res;
    void (*dinb) (struct rio_mport *mport, void *dev_id, u16 src, u16
dst, u16 info);
    void *dev_id;
 };

Four members, one callback, zero chill. Let's go through them 🫶

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🎀 Members 🎀

• node — this is the node in the list of doorbell events. It's how this dbell gets chained up with all its little friends. Linked-list energy fr fr 🌸
• res — the doorbell resource. It's a struct resource *, so it's pointing at the actual resource situation. 💜
• dinb — the doorbell event callback, and the way that this one has a whole signature: it takes a struct rio_mport *mport, a void *dev_id, a u16 src, a u16 dst, and a u16 info. Five things. It's giving very thorough. When the doorbell event goes off, this is what gets called, bestie 📞✨
• dev_id — a device-specific pointer that gets passed on the event. So it's like the little name tag your device wears so dinb knows who's calling. 🎀

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👑 SEE ALSO 👑

Go read these next, iykyk — the kernel file is ./include/linux/rio.h, and it's hanging out with a whole friend group:

• struct rio_switch(9)
• struct rio_switch_ops(9)
• struct rio_dev(9)
• struct rio_msg(9)
• struct rio_mport(9)
• struct rio_net(9)
• struct rio_mport_attr(9)
• struct rio_ops(9)
• struct rio_driver(9)
• struct rio_scan(9)
• struct rio_scan_node(9)

That's eleven cross-references. Eleven. She said "read the whole lore" 💀📚

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Lowkey reminder: this is a struct definition page, so it's describing fields, not options. There's nothing to pass to a command here — no flags, no defaults, no exit statuses. Just the shape of the thing, bestie. 🧚

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And that's the whole page!! This one came from ./include/linux, dated October 2026, and the page title is struct rio_dbell(9). Slay, go forth and ring those doorbells 💅🔔🌈