uaudio_iommu_map_pa(9)

💖 uaudio_iommu_map_pa(9) — Kernel API Manual 💖

okay bestie, this is the Kernel API Manual entry for uaudio_iommu_map_pa(9) — manual name folded in right here, no boring duplicated header line, we’re doing main character energy only. ✨

🌸 NAME 🌸

uaudio_iommu_map_pa — maps iommu memory for adsp. 💅

✨ SYNOPSIS ✨

unsigned long uaudio_iommu_map_pa (enum mem_type mtype , bool
       dma_coherent , phys_addr_t pa , size_t size );

🎀 ARGUMENTS 🎀

• mtype — the ring type, periodt.
• dma_coherent — the dma coherent situation, literally.
• pa — physical address for the ring/buffer, no cap.
• size — size of the memory region. 🫶

🦋 DESCRIPTION 🦋

So what does it do? It maps the XHCI related resources to a memory region that is assigned to be used by the adsp. That gets mapped to the domain, and that domain is created by the ASoC USB backend driver. Slay. 💖

💜 SEE ALSO 💜

Kernel file ./sound/usb/qcom/qc_audio_offload.c is in the mix too, bestie. Here are all the related manual-page besties, in the exact order they showed up:

• uaudio_iommu_unmap(9)
• uaudio_dev_intf_cleanup(9)
• uaudio_event_ring_cleanup_free(9)
• disable_audio_stream(9)
• uaudio_sideband_notifier(9)
• qmi_bye_cb(9)
• qmi_svc_disconnect_cb(9)
• enable_audio_stream(9)
• uaudio_transfer_buffer_setup(9)
• uaudio_endpoint_setup(9)
• uaudio_event_ring_setup(9)
• uaudio_populate_uac_desc(9)
• prepare_qmi_response(9)
• handle_uaudio_stream_req(9)
• qc_usb_audio_offload_init_qmi_dev(9)
• qc_usb_audio_offload_probe(9)
• qc_usb_audio_cleanup_qmi_dev(9)
• qc_usb_audio_offload_disconnect(9)
• qc_usb_audio_offload_suspend(9)

mwah 💋 this whole uaudio_iommu_map_pa(9) moment comes from the ./sound/usb/qcom corner of the Kernel API Manual, dated October 2026. Bye bestie! 🎀✨