b8de1292e9
Add Unsigned PD pool configuration and allocation ranges property, used to pool multiple SMMU context banks with a fixed allocation ranges. This pool can be used by multiple Unsigned applications to offload to remote DSP subsystem and this removes the limitation of only allowing fixed number of Unsigned applications to offload to remote DSP subsystem. Change-Id: I3dc4309f4423aae7e68c743d129f9671a1ed96ca Signed-off-by: Himateja Reddy <quic_hmreddy@quicinc.com>
106 lines
3.7 KiB
Plaintext
106 lines
3.7 KiB
Plaintext
Qualcomm Technologies, Inc. FastRPC Driver
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The MSM FastRPC driver implements an IPC (Inter-Processor Communication)
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mechanism that allows for clients to transparently make remote method
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invocations across DSP and APPS boundaries. This enables developers
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to offload tasks to the DSP and free up the application processor for
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other tasks.
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Required properties:
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- compatible : Must be one of "qcom,msm-fastrpc-adsp" or "qcom,msm-fastrpc-compute"
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Optional properties:
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- qcom,rpc-latency-us : FastRPC QoS latency vote
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- qcom,adsp-remoteheap-vmid : FastRPC remote heap VMID list
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- qcom,secure-context-bank : Bool indicating secure FastRPC context bank.
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- qcom,fastrpc-legacy-remote-heap : Bool indicating hypervisor is not supported.
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- qcom,fastrpc-adsp-audio-pdr : Flag to enable ADSP Audio PDR
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- qcom,secure-domains : FastRPC secure domain configuration
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- qcom,fastrpc-adsp-sensors-pdr : Flag to enable Sensors PDR
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- qcom,single-core-latency-vote : Limit FastRPC PM QoS to only vote for 1
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lowest capacity core
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Optional subnodes:
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- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context banks
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- qcom,msm-fastrpc-rpmsg : Child node for rpmsg instead of glink for IPC
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Subnode Required properties:
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- compatible : Must be "qcom,msm-fastrpc-compute-cb"
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- label : Label describing the channel this context bank belongs to
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- iommus : A list of phandle and IOMMU specifier pairs that describe the
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IOMMU master interfaces of the device
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- dma-coherent : A flag marking a context bank as I/O coherent
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- shared-cb : A value indicating how many fastrpc sessions can share a
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context bank
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- pd-type : A value indicating remote subsystem proess type
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- alloc-size-range: A pair values indicating the allocation size range
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of context bank
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Example:
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qcom,msm_fastrpc {
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compatible = "qcom,msm-fastrpc-compute";
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qcom,fastrpc-rpmsg;
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qcom,rpc-latency-us = <235>;
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qcom,adsp-remoteheap-vmid = <22 37>;
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qcom,fastrpc-adsp-sensors-pdr;
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qcom,msm_fastrpc_rpmsg {
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compatible = "qcom,msm-fastrpc-rpmsg";
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qcom,glink-channels = "fastrpcglink-apps-dsp";
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intents = <0x64 64>;
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};
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qcom,msm_fastrpc_compute_cb_1 {
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compatible = "qcom,msm-fastrpc-compute-cb";
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label = "cdsprpc-smd";
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qcom,secure-context-bank;
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iommus = <&apps_smmu 0x1401 0x0>;
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dma-coherent;
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};
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qcom,msm_fastrpc_compute_cb_2 {
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compatible = "qcom,msm-fastrpc-compute-cb";
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label = "sdsprpc-smd";
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iommus = <&apps_smmu 0x1402 0x0>;
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shared-cb = <5>;
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};
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};
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Legacy SMMU v1/v2:
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Required properties:
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- compatible : Must be "qcom,msm-fastprc-legacy-compute-cb"
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Required subnode:
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- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context
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banks
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Required subnode properties:
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- qcom,adsp-shared-phandle : phandle that describe the context bank handle
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- qcom,adsp-shared-sids : A list of SID associated with the context bank
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- qcom,virtual-addr-pool : Virtual address range that the context bank
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will be using
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Example:
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qcom,adsprpc_domains {
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compatible = "qcom,msm-fastrpc-legacy-compute-cb";
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qcom,msm_fastrpc_compute_cb {
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qcom,adsp-shared-phandle = <&adsp_shared>;
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qcom,adsp-shared-sids = <0x8 0x9>;
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qcom,virtual-addr-pool = <0x80000000 0x7FFFFFFF>;
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};
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};
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Remote Heap:
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Required properties:
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- compatible : Must be "qcom,msm-adsprpc-mem-region"
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- memory-region : CMA region which is owned by this device
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- restrict-access : Blocking vote for hyp_assign_phys function call
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Example:
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qcom,adsprpc-mem {
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compatible = "qcom,msm-adsprpc-mem-region";
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memory-region = <&adsp_mem>;
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restrict-access;
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};
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