dwc2_ls_pmap_schedule(9)

✨ NAME ✨

dwc2_ls_pmap_schedule — schedule a low speed QH, bestie. This is the dwc2_ls_pmap_schedule(9) page from the Kernel API Manual, and we’re gonna make it make sense 💅

🌸 SYNOPSIS 🌸

int dwc2_ls_pmap_schedule (struct dwc2_hsotg *hsotg , struct dwc2_qh *qh
, int search_slice );

🦋 ARGUMENTS 🦋

• hsotg — the HCD state struct for the DWC OTG controller, aka the controller’s whole main-character state.
• qh — the QH for the periodic transfer.
• search_slice — we start trying to schedule at the slice you pass in. Remember that slices are the units of the low speed schedule (think 25us or so), so that’s the vibe.

💅 DESCRIPTION 💅

Okay so this wraps pmap_schedule with the right parameters for low speed scheduling. Normally, low speed devices get scheduled on the map associated with the TT. That’s the whole tea 🫖

🫶 RETURN 🫶

0 for success, or an error code. No cap.

👑 SEE ALSO 👑

Kernel file ./drivers/usb/dwc2/hcd_queue.c — go read it, iykyk:

• 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_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_qh_init(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)

mwah 💋 this page is from ./drivers/usb/dwc2, dated October 2026, and it’s literally dwc2_ls_pmap_schedule(9). periodt 🎀