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Commit 36d642bd authored by Kyle Yan's avatar Kyle Yan Committed by Gerrit - the friendly Code Review server
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Merge "msm: ADSPRPC: Add snapshot of RPC driver" into msm-4.8

parents 11a4004d 69e1ab03

Documentation/devicetree/bindings/qdsp/msm-fastrpc.txt

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Qualcomm Technologies, Inc. FastRPC Driver



The MSM FastRPC driver implements an IPC (Inter-Processor Communication)

mechanism that allows for clients to transparently make remote method

invocations across DSP and APPS boundaries. This enables developers

to offload tasks to the DSP and free up the application processor for

other tasks.



Required properties:

- compatible :	Must be one of "qcom,msm-fastrpc-adsp" or

		"qcom,msm-fastrpc-compute"



Optional properties:

- qcom,fastrpc-glink:	Flag to use glink instead of smd for IPC



Optional subnodes:

- qcom,msm_fastrpc_compute_cb :	Child nodes representing the compute context

				banks

Subnode Required properties:

- compatible :		Must be "qcom,msm-fastrpc-compute-cb"

- label:		Label describing the channel this context bank belongs to

- iommus : 		A list of phandle and IOMMU specifier pairs that describe the

			IOMMU master interfaces of the device



Example:

	qcom,msm_fastrpc {

		compatible = "qcom,msm-fastrpc-adsp";

		qcom,fastrpc-glink;



		qcom,msm_fastrpc_compute_cb_1 {

			compatible = "qcom,msm-fastrpc-compute-cb";

			label = "adsprpc-smd";

			iommus = <&lpass_q6_smmu 8>,

		};

		qcom,msm_fastrpc_compute_cb_2 {

			compatible = "qcom,msm-fastrpc-compute-cb";

			label = "adsprpc-smd";

			iommus = <&lpass_q6_smmu 9>,

		};

	};



Legacy SMMU v1/v2:



Required properties:

- compatible : Must be "qcom,msm-fastprc-legacy-compute-cb"



Required subnode:

- qcom,msm_fastrpc_compute_cb : Child nodes representing the compute context

                                banks



Required subnode properties:

- qcom,adsp-shared-phandle: phandle that describe the context bank handle

- qcom,adsp-shared-sids : A list of SID associated with the context bank

- qcom,virtual-addr-pool : Virtual address range that the context bank

                           will be using



Example:

        qcom,adsprpc_domains {

                compatible = "qcom,msm-fastrpc-legacy-compute-cb";

                qcom,msm_fastrpc_compute_cb {

                       qcom,adsp-shared-phandle = <&adsp_shared>;

                       qcom,adsp-shared-sids = <0x8 0x9>;

                       qcom,virtual-addr-pool = <0x80000000 0x7FFFFFFF>;

                };

        };



Remote Heap:



Required properties:

- compatible : Must be "qcom,msm-adsprpc-mem-region"

- memory-region : CMA region which is owned by this device



Example:

       qcom,adsprpc-mem {

               compatible = "qcom,msm-adsprpc-mem-region";

               memory-region = <&adsp_mem>;

       };

drivers/char/Kconfig

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@@ -592,5 +592,14 @@ config TILE_SROM 


source "drivers/char/xillybus/Kconfig"



config MSM_ADSPRPC

        tristate "QTI ADSP RPC driver"

        depends on MSM_GLINK

        help

          Provides a communication mechanism that allows for clients to

          make remote method invocations across processor boundary to

          applications DSP processor. Say M if you want to enable this

          module.



endmenu

drivers/char/Makefile

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@@ -61,3 +61,7 @@ obj-$(CONFIG_TILE_SROM) += tile-srom.o 
obj-$(CONFIG_DIAG_CHAR)		+= diag/

obj-$(CONFIG_XILLYBUS)		+= xillybus/

obj-$(CONFIG_POWERNV_OP_PANEL)	+= powernv-op-panel.o

obj-$(CONFIG_MSM_ADSPRPC)       += adsprpc.o

ifdef CONFIG_COMPAT

obj-$(CONFIG_MSM_ADSPRPC)       += adsprpc_compat.o

endif