dwc2_qh_init(9)

okay bestie, welcome to the dwc2_qh_init(9) page from the Kernel API Manual 💅 this one is short and sweet, and it’s giving “init that QH structure” energy.

🌸 NAME 🌸

dwc2_qh_init — Initializes a QH structure. That’s the whole vibe: it initializes a QH structure, periodt ✨

✨ SYNOPSIS ✨

void dwc2_qh_init (struct dwc2_hsotg *hsotg , struct dwc2_qh *qh ,
       struct dwc2_hcd_urb *urb , gfp_t mem_flags );

🎀 ARGUMENTS 🎀

• hsotg — the HCD state structure for the DWC OTG controller, aka the controller’s main-character state 💖
• qh — the QH to init, bestie, that’s the one getting set up 🫶
• urb — holds the information about the device/endpoint needed to initialize the QH 👑
• mem_flags — flags for allocating memory. literally the memory-allocation receipts 💅

🦋 SEE ALSO 🦋

Kernel file: ./drivers/usb/dwc2/hcd_queue.c

the whole squad of related calls:

• dwc2_periodic_channel_available(9)
• dwc2_check_periodic_bandwidth(9)
• pmap_schedule(9)
• pmap_unschedule(9)
• dwc2_get_ls_map(9)
• dwc2_qh_print(9)
• dwc2_qh_schedule_print(9)
• dwc2_ls_pmap_schedule(9)
• dwc2_ls_pmap_unschedule(9)
• dwc2_hs_pmap_schedule(9)
• dwc2_hs_pmap_unschedule(9)
• dwc2_uframe_schedule_split(9)
• dwc2_uframe_schedule_hs(9)
• dwc2_uframe_schedule_ls(9)
• dwc2_uframe_schedule(9)
• dwc2_uframe_unschedule(9)
• dwc2_pick_first_frame(9)
• dwc2_do_reserve(9)
• dwc2_do_unreserve(9)
• dwc2_unreserve_timer_fn(9)
• dwc2_check_max_xfer_size(9)
• dwc2_schedule_periodic(9)
• dwc2_deschedule_periodic(9)
• dwc2_wait_timer_fn(9)
• dwc2_hcd_qh_create(9)
• dwc2_hcd_qh_free(9)
• dwc2_hcd_qh_add(9)
• dwc2_hcd_qh_unlink(9)
• dwc2_next_for_periodic_split(9)
• dwc2_next_periodic_start(9)
• dwc2_hcd_qtd_init(9)
• dwc2_hcd_qtd_add(9)

bye bestie 🫶 shoutout to the source/version ./drivers/usb/dwc2 and the October 2026 date — this was the dwc2_qh_init(9) page from the Kernel API Manual, and yes, it ate 🌈💖