rio_get_device_id(9)

💅 rio_get_device_id(9) — the kernel API manual, but make it make sense 🎀

Okay bestie, so this is a page from the Kernel API Manual — the rio_get_device_id(9) one — and it's literally so much simpler than it looks. It's giving "one job, does it well." Let's get into it ✨

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🌸 NAME 🌸

rio_get_device_id — get the base/extended device id for a device 🫶

Like, that's the whole vibe. It scoops up a device's ID. Iconic behaviour, no notes.

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🦋 SYNOPSIS 🦋

u16 rio_get_device_id (struct rio_mport *port , u16 destid , u8 hopcount
);

Three things go in, one u16 comes out. Not me being obsessed with a function signature but she's clean 💅

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🎀 ARGUMENTS 🎀

• port — the RIO master port. Like, the main character of the operation 🌟
• destid — the Destination ID of the device. This is how we know which device we're talking about, iykyk 💖
• hopcount — the hopcount to the device. Yes, literally how many hops away it is 🐇

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⭐ DESCRIPTION ⭐

So what does she actually do? She reads the base/extended device id from a device 🎯

And then? She returns the 8/16-bit device ID. That's it. That's the whole function. Short queen behaviour, no cap 👑

Ngl, this is one of those "the name tells you everything" situations. Lowkey refreshing fr fr.

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🌈 SEE ALSO 🌈

Bestie, the cross-references go deep. Buckle up, because this list is long and every single one of these is part of the RapidIO saga 💜

Kernel file ./drivers/rapidio/rio-scan.c, plus:

rio_destid_alloc(9), rio_destid_reserve(9), rio_destid_free(9), rio_destid_first(9), rio_destid_next(9), rio_set_device_id(9), rio_clear_locks(9), rio_enum_host(9), rio_device_has_destid(9), rio_release_dev(9), rio_is_switch(9), rio_setup_device(9), rio_sport_is_active(9), rio_get_host_deviceid_lock(9), rio_enum_peer(9), rio_enum_complete(9), rio_disc_peer(9), rio_mport_is_active(9), rio_update_route_tables(9), rio_init_em(9), rio_enum_mport(9), rio_build_route_tables(9), rio_disc_mport(9), rio_basic_attach(9)

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Okay that's the page!! Mwah 💋 Big kiss, and a cute little sign-off: this one lives in the source/version corner at ./drivers/rapidio, dated October 2026, and the title is rio_get_device_id(9) — go forth and read those device IDs bestie, slay 🧚‍♀️✨🔥