dwc2_get_ls_map(9)

🦋 dwc2_get_ls_map(9)

okay so this page is from the Kernel API Manual, bestie — and it's literally about getting the map used for a given qh. 💅

🌸 NAME 🌸

dwc2_get_ls_map — Get the map used for the given qh.

✨ SYNOPSIS ✨

unsigned long * dwc2_get_ls_map (struct dwc2_hsotg *hsotg , struct
       dwc2_qh *qh );

🎀 ARGUMENTS 🎀

• hsotg — The HCD state structure for the DWC OTG controller.
• qh — QH for the periodic transfer.

💖 DESCRIPTION 💖

okay so here's the vibe: we'll always get the periodic map out of our TT. 🧚 Note that even if we're running the host straight in low speed / full speed mode, it appears as if a TT is allocated for us, so we'll use it. If that ever changes, we can add logic here to get a map out of hsotg if !qh->do_split. no cap.

🫶 RETURN 🫶

it gives you the map or NULL if a map couldn't be found. periodt. 💫

📚 SEE ALSO 📚

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

the whole bestie squad of refs:

• dwc2_periodic_channel_available(9)
• dwc2_check_periodic_bandwidth(9)
• pmap_schedule(9)
• pmap_unschedule(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_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 source/version ./drivers/usb/dwc2, dated October 2026, for dwc2_get_ls_map(9). slay 🎀