STRUCT RIO_SWITCH(9)

💅 struct rio_switch(9) — the Kernel API Manual, bestie edition 🎀

okay so picture this: it's a kernel API manual page, it's called struct rio_switch(9), and it's literally the whole personality of a RapidIO switch, packed into one struct. come learn her with me, she's iconic and honestly not that complicated once you meet the members 🦋

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✨ NAME ✨

struct rio_switch — RIO switch info. that's it. that's the vibe. she holds the info. 💖

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🌸 SYNOPSIS 🌸

struct rio_switch {
    struct list_head node;
    u8 *route_table;
    u32 port_ok;
    struct rio_switch_ops *ops;
    spinlock_t lock;
    struct rio_dev *nextdev[];
};

look at her. six fields. no cap, that's the whole struct. let's go member by member, main character energy only 👑

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🫶 Members 🫶

• node — her little spot in the global list of switches 🎀 like she's on the group chat roster, always present, always accounted for.
• route_table — a copy of the switch routing table ✨ not a pointer to the original, bestie, a copy. she keeps her own receipts.
• port_ok — the status of each port, one bit per port 🔥 literally, one bit each: OK=1 or UNINIT=0. so if you're counting bits to find your port, yes, that's the whole system, that's how she rolls.
• ops — pointer to the switch-specific operations 💅 every switch has her own little bag of tricks and this is where she keeps it.
• lock — the lock that serializes operations updates 🔒 nobody touches the operations at the same time, that's the rule, periodt.
• nextdev — an array of per-port pointers to the next attached device 👑 one entry per port, each one pointing onward to whatever device is chained next. it's giving linked list but make it hardware. iykyk.

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🌈 SEE ALSO 🌈

kernel file ./include/linux/rio.h — go read it, bestie, fr fr — plus these absolute icons:

• struct rio_switch_ops(9)
• struct rio_dev(9)
• struct rio_msg(9)
• struct rio_dbell(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)

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not me ending the page already 😭 but like, that's genuinely all of her. every member, every bit, every pointer. no gatekeeping here 💜

okay bye ily — this page lives in ./include/linux and it's dated October 2026, and the footer still reps struct rio_switch(9) because she's that girl 🌟💖✨