STRUCT MTU3_EP(9)

✨ struct mtu3_ep(9) ✨

okay so this is a page from the Kernel API Manual and honestly? it's giving "underrated baddie of the USB driver world" 💅 we're talking about struct mtu3_ep — the common mtu3 endpoint description, no cap. if you've ever wondered how one little endpoint keeps its whole life together, bestie, this is it 🫶

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💖 NAME 💖

struct mtu3_ep — the common mtu3 endpoint description. literally that's her job title and she ate ✨

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🦋 SYNOPSIS 🦋

here's the whole glow-up, character for character, don't touch a single thing:

struct mtu3_ep {
    struct usb_ep ep;
    char name[12];
    struct mtu3 *mtu;
    u8 epnum;
    u8 type;
    u8 is_in;
    u16 maxp;
    int slot;
    u32 fifo_size;
    u32 fifo_addr;
    u32 fifo_seg_size;
    struct mtu3_fifo_info *fifo;
    struct list_head req_list;
    struct mtu3_gpd_ring gpd_ring;
    const struct usb_ss_ep_comp_descriptor *comp_desc;
    const struct usb_endpoint_descriptor *desc;
    int flags;
 };

like, look at those fields. main character energy fr fr 😭💜

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🎀 Members 🎀

only two get their own lil spotlight here, so let's give them their moment:

• fifo_size — heads up bestie, it's (slot + 1) * fifo_seg_size. that's the whole vibe. math but make it fashion 🧮💅
• fifo_seg_size — and this one? it's roundup_pow_of_two(maxp). iconic behavior, rounding up to the next power of two like it owns the place ✨

ngl the rest of the fields are just chilling up in the synopsis, living their best lives — no extra lore given, so we're not inventing any 🙈

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🌈 SEE ALSO 🌈

go give these siblings some love, they're all in the Kernel file ./drivers/usb/mtu3/mtu3.h:

• enum mtu3_g_ep0_state(9)
• enum mtu3_dr_force_mode(9)
• struct mtu3_fifo_info(9)
• struct qmu_gpd(9)
• struct mtu3_gpd_ring(9)
• struct otg_switch_mtk(9)
• struct ssusb_mtk(9)
• struct mtu3(9)

it's a whole friend group, we stan a supportive cast 🫶💖

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so yeah, that's the whole page 🌸 this lil icon lives over at ./drivers/usb/mtu3 and the version vibes are dated October 2026 — struct mtu3_ep(9), signing off, mwah 💋⭐