STRUCT CDX_OPS(9)

💅 struct cdx_ops(9) — like, the Kernel API Manual, but make it make sense 🎀

okay bestie, so this is a page from the Kernel API Manual and it's about struct cdx_ops — literally the callback squad that a CDX controller supports. it's giving "here's the vibe contract between the bus and your controller" and honestly? iconic. ✨

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🌸 NAME 🌸

struct cdx_ops — the callbacks supported by the CDX controller. that's it, that's the whole personality. 💖

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🦋 SYNOPSIS 🦋

struct cdx_ops {
    cdx_bus_enable_cb bus_enable;
    cdx_bus_disable_cb bus_disable;
    cdx_scan_cb scan;
    cdx_dev_configure_cb dev_configure;
 };

like, four function pointers, all lined up, all with their own little type names. no cap, that's the whole struct. 🫶

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👑 Members 👑

okay so let's meet the cast, main character energy only:

• bus_enable — enables the bus on the controller. yes. that's the job. it turns the bus on 🔥
• bus_disable — disables the bus on the controller. the reverse slay. bus off, bestie 💀
• scan — scans for the devices hanging out on the controller. like a little headcount for the bus 🌈
• dev_configure — the config-y one: stuff like reset, master_enable, msi_config etc. for a CDX device. one callback, many chores, we love a multitasker 💅

ngl, these are callbacks — so you provide them, and the CDX controller calls them. don't come for me, that's literally what the struct is for. 🧚

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⭐ SEE ALSO ⭐

go read these next, i'm obsessed with the cross-references:

• the kernel file ./include/linux/cdx/cdx_bus.h — start here fr fr
• CDX_DEVICE(9)
• CDX_DEVICE_DRIVER_OVERRIDE(9)
• struct cdx_controller(9)
• struct cdx_device(9)
• struct cdx_driver(9)
• __cdx_driver_register(9)
• cdx_driver_unregister(9)
• cdx_dev_reset(9)
• cdx_set_master(9)
• cdx_clear_master(9)
• cdx_enable_msi(9)
• cdx_disable_msi(9)

like a whole group chat of related pages. iykyk. 💜

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aaaand that's the page! 🍓 cute little sign-off: this lives under ./include/linux/cdx, version date October 2026, and it's filed as struct cdx_ops(9). mwah, go read the other pages bestie 💖✨🎀