The audio ML (machine-learning) offload use case requires a contiguous, physically addressable buffer shared with the audio DSP/SPF, and issues DMA transactions through additional SMMU stream IDs that are not covered by the existing ADSP mapping.
Add a dedicated reusable shared-dma-pool CMA region (16 MiB, 4 MiB aligned) and wire it to the q6apm DAIs node via memory-region. A dedicated pool guarantees the alignment and contiguity the DSP expects and isolates these allocations from the default CMA region. Under the EL2 (Gunyah/hypervisor) configuration the SMMU is fully enforcing, so the ML transactions are otherwise blocked and faulted: arm-smmu 15000000.iommu: Blocked unknown Stream ID 0x2060 arm-smmu 15000000.iommu: Blocked unknown Stream ID 0x2062 Add the ML-related stream IDs (0x3060 mask 0x9, 0x3062 mask 0x1) to the remoteproc_adsp iommus property in the EL2 overlay so these buffers are translated by the SMMU instead of being rejected. Signed-off-by: Pratyush Meduri <[email protected]> --- arch/arm64/boot/dts/qcom/monaco-el2.dtso | 4 +++- arch/arm64/boot/dts/qcom/monaco.dtsi | 9 +++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/monaco-el2.dtso b/arch/arm64/boot/dts/qcom/monaco-el2.dtso index a7e3270f8609..97bb8287cec3 100644 --- a/arch/arm64/boot/dts/qcom/monaco-el2.dtso +++ b/arch/arm64/boot/dts/qcom/monaco-el2.dtso @@ -17,7 +17,9 @@ &iris { }; &remoteproc_adsp { - iommus = <&apps_smmu 0x2000 0x0>; + iommus = <&apps_smmu 0x2000 0x0>, + <&apps_smmu 0x2060 0x9>, + <&apps_smmu 0x2062 0x1>; }; &remoteproc_cdsp { diff --git a/arch/arm64/boot/dts/qcom/monaco.dtsi b/arch/arm64/boot/dts/qcom/monaco.dtsi index 64fc0d592282..d971c0ea1b30 100644 --- a/arch/arm64/boot/dts/qcom/monaco.dtsi +++ b/arch/arm64/boot/dts/qcom/monaco.dtsi @@ -729,6 +729,14 @@ reserved-memory { #size-cells = <2>; ranges; + audio_cma_mem: qcom,audio-ml { + compatible = "shared-dma-pool"; + alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>; + reusable; + alignment = <0x0 0x400000>; + size = <0x0 0x1000000>; + }; + aop_image_mem: aop-image-region@90800000 { reg = <0x0 0x90800000 0x0 0x60000>; no-map; @@ -2844,6 +2852,7 @@ q6apmbedai: bedais { q6apmdai: dais { compatible = "qcom,q6apm-dais"; iommus = <&apps_smmu 0x2001 0x0>; + memory-region = <&audio_cma_mem>; }; }; -- 2.34.1
