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 0x3060 arm-smmu 15000000.iommu: Blocked unknown Stream ID 0x3062 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/lemans-el2.dtso | 4 +++- arch/arm64/boot/dts/qcom/lemans.dtsi | 9 +++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/lemans-el2.dtso b/arch/arm64/boot/dts/qcom/lemans-el2.dtso index 621ad930cf54..5b477346ef90 100644 --- a/arch/arm64/boot/dts/qcom/lemans-el2.dtso +++ b/arch/arm64/boot/dts/qcom/lemans-el2.dtso @@ -19,7 +19,9 @@ &iris { }; &remoteproc_adsp { - iommus = <&apps_smmu 0x3000 0x0>; + iommus = <&apps_smmu 0x3000 0x0>, + <&apps_smmu 0x3060 0x9>, + <&apps_smmu 0x3062 0x1>; }; &remoteproc_cdsp0 { diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi index 3b0539e27b51..060565113784 100644 --- a/arch/arm64/boot/dts/qcom/lemans.dtsi +++ b/arch/arm64/boot/dts/qcom/lemans.dtsi @@ -624,6 +624,14 @@ 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>; + }; + sail_ss_mem: sail-ss@80000000 { reg = <0x0 0x80000000 0x0 0x10000000>; no-map; @@ -8134,6 +8142,7 @@ q6apmbedai: bedais { q6apmdai: dais { compatible = "qcom,q6apm-dais"; iommus = <&apps_smmu 0x3001 0x0>; + memory-region = <&audio_cma_mem>; }; }; -- 2.34.1
