STRUCT IPACK_DEVICE(9)

📦 version 7.3.1, in nixpkgs unstable

💅 struct ipack_device(9) — like, the whole vibe

okay so this is from the Kernel API Manual, bestie — it's the struct ipack_device(9) page and it's literally the blueprint for how the IPack subsystem thinks about a device. sit down, grab a strawberry drink 🍓, we're doing this.

✨ NAME ✨

struct ipack_device — the subsystem's own representation of an IPack device. that's it, that's the whole name. main character energy 👑

🎀 SYNOPSIS 🎀

struct ipack_device {
    unsigned int slot;
    struct ipack_bus_device *bus;
    struct device dev;
    void (*release) (struct ipack_device *dev);
    struct ipack_region      region[IPACK_SPACE_COUNT];
    u8 *id;
    size_t id_avail;
    u32 id_vendor;
    u32 id_device;
    u8 id_format;
    unsigned int             id_crc_correct:1;
    unsigned int             speed_8mhz:1;
    unsigned int             speed_32mhz:1;
 };

copy it exactly, don't get cute with it, fr fr 🙈

🌸 Members 🌸

so not every field gets a little paragraph — the page only spells out three of them, and here they are:

  • slot — the slot where the device is plugged in the carrier board. that's its spot. its home. its little seat 💺
  • bus — the ipack_bus_device where the device is plugged to. the bus bestie it's attached to 🚌
  • dev — the device in kernel representation. the kernel-flavoured version of the same thing, iconic 🌈
the rest of the fields (release, region, id, id_avail, id_vendor, id_device, id_format, id_crc_correct:1, speed_8mhz:1, speed_32mhz:1) show up in the synopsis up there — this page just doesn't give them their own little blurbs. no cap, that's genuinely all it says 🤷‍♀️

🦋 Description 🦋

Warning: direct access to mapped memory is possible, BUT the endianness is not the same with a PCI carrier or a VME carrier. 💀

like, you can poke at the mapped memory directly, but please internalize this: PCI carrier and VME carrier do not agree on endianness. the endianness is managed by the carrier board through bus->ops. so the board handles the byte-order situation for you — don't go doing your own thing and then acting surprised 😭

💜 SEE ALSO 💜

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

aaaand that's the page 🫶 this one lives in ./include/linux, dated October 2026. slay, go build something, mwah 💅✨

📦 where this page comes from