[PATCH v1 0/2] arm64: dts: qcom: enable audio ML offload

[PATCH v1 0/2] arm64: dts: qcom: enable audio ML offload

[Pratyush Meduri]

The audio ML offload use case on Lemans requires a dedicated contiguous
memory region shared with the audio DSP/SPF as well as corresponding
SMMU stream ID mappings under the EL2 configuration.

This series adds a dedicated CMA pool for audio ML buffers and
associates it with the q6apm audio subsystem. It also updates the ADSP
SMMU configuration in the EL2 overlay to include the ML-related stream
IDs required for DMA transactions during model offload.

Without these changes, audio ML workloads may fail due to unavailable
contiguous memory or SMMU faults caused by unmapped stream IDs.

Pratyush Meduri (2):
  arm64: dts: qcom: lemans: enable audio ML offload memory and SMMU
    mappings
  arm64: dts: qcom: monaco: enable audio ML offload memory and SMMU
    mappings

 arch/arm64/boot/dts/qcom/lemans-el2.dtso | 4 +++-
 arch/arm64/boot/dts/qcom/lemans.dtsi     | 9 +++++++++
 arch/arm64/boot/dts/qcom/monaco-el2.dtso | 4 +++-
 arch/arm64/boot/dts/qcom/monaco.dtsi     | 9 +++++++++
 4 files changed, 24 insertions(+), 2 deletions(-)


base-commit: b8809969e1d7a591e0f49dd464a5d04b3cf02ab1
-- 
2.34.1

[PATCH v1 1/2] arm64: dts: qcom: lemans: enable audio ML offload memory and SMMU mappings

[Pratyush Meduri]

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 <pratyush.meduri@oss.qualcomm.com>
---
 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

[PATCH v1 2/2] arm64: dts: qcom: monaco: enable audio ML offload memory and SMMU mappings

[Pratyush Meduri]

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 <pratyush.meduri@oss.qualcomm.com>
---
 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

Re: [PATCH v1 1/2] arm64: dts: qcom: lemans: enable audio ML offload memory and SMMU mappings

[Konrad Dybcio]

On 7/16/26 5:18 PM, Pratyush Meduri wrote:
> 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.

[...]

>  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>;

1. Does the Gunyah setup need any updates?
2. Are the existing SIDs wrong? Aren't they just used for other offloads
   usecases?
>  };
>  
>  &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 {

Node names *must not* contain commas and should be generic

> +			compatible = "shared-dma-pool";
> +			alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;

Is the last byte forbidden on purpose?

Konrad

Re: [PATCH v1 1/2] arm64: dts: qcom: lemans: enable audio ML offload memory and SMMU mappings

[Krzysztof Kozlowski]

On 16/07/2026 18:24, Konrad Dybcio wrote:
> On 7/16/26 5:18 PM, Pratyush Meduri wrote:
>>  
>>  &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 {
> 
> Node names *must not* contain commas and should be generic

That's a pure downstream code dump. Not acceptable really.

Best regards,
Krzysztof