STRUCT UVC_URB(9)

✨ struct uvc_urb(9) ✨

okay so bestie, welcome to the Kernel API Manual 💅 we're talking about struct uvc_urb today and honestly? it's giving backstage-pass energy for your USB video chaos. let's get into it 🎀

🌸 NAME 🌸

struct uvc_urb — the URB context management structure. yep, that's the whole vibe: it manages URB context. iconic behavior only 🫶

🦋 SYNOPSIS 🦋

struct uvc_urb {
    struct urb *urb;
    struct uvc_streaming *stream;
    char *buffer;
    dma_addr_t dma;
    struct sg_table *sgt;
    unsigned int async_operations;
    struct uvc_copy_op copy_operations[UVC_MAX_PACKETS];
    struct work_struct work;
 };

like, that's the whole struct, no cap. every field accounted for, nothing skipped, we love a complete inventory ✨

💜 Members 💜

• urb — the URB that this context structure is describing. main character of the struct, tbh 👑
• stream — the UVC streaming context. the whole streaming situation lives here 🌈
• buffer — the memory storage for the URB. the URB's designated little home 🏠
• dma — the allocated DMA handle 🔥
• sgt — the sgt_table with the urb locations in memory. lowkey the map of where stuff actually lives 🗺️
• async_operations — a counter that indicates the number of copy operations 🔢
• copy_operations — work descriptors for asynchronous copy operations. yes, it's an array — struct uvc_copy_op copy_operations[UVC_MAX_PACKETS] — so it's plural for a reason fr fr 🍓
• work — the work queue entry for asynchronous decode. the little errand-runner that gets the decode done 💅

⭐ SEE ALSO ⭐

• Kernel file ./drivers/media/usb/uvc/uvcvideo.h — go read it, iykyk 📖
• struct uvc_copy_op(9) — the sequel, so to speak 😭

and that's the page!! 🎀 this one comes from ./drivers/media/usb/uvc, dated October 2026 — Kernel API Manual realness, periodt 💖 go forth and manage your URB contexts, bestie 🦋