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Commit 4c96b1dd authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "memshare: Add snapshot of memshare driver"

parents 35d3c928 bc570dc3

Documentation/devicetree/bindings/arm/msm/heap-sharing.txt

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* Memory Share Driver (MEMSHARE)



The Memshare driver implements a Kernel QMI service on the

LA-APSS, which is responsible for providing contiguous physical

memory to MPSS for use cases when the modem requires additional

memory (e.g. GPS).



Required properties for Memshare



-Root Node-



- compatible:	Must be "qcom,memshare"



Required properties for child nodes:



- compatible:	Must be "qcom,memshare-peripheral"



- qcom,peripheral-size:	Indicates the size (in bytes) required for that child.



- qcom,client-id:	Indicates the client id of the child node.



- label:	Indicates the peripheral information for the node. Should be one of

  the following:

  - modem	/* Represent Modem Peripheral */

  - adsp	/* Represent ADSP Peripheral */

  - wcnss	/* Represent WCNSS Peripheral */



Optional properties for child nodes:



- qcom,allocate-boot-time:	Indicates whether clients needs boot time memory allocation.



- qcom,allocate-on-request:	Indicates memory allocation happens only upon client request



Note: qcom,allocate-boot-time and qcom,allocate-on-request are mutually exclusive rite now.



- qcom,guard-band:	Indicates addition of a guard band memory allocation in addition to the client's memory region.



Example 1:



qcom,memshare {

	compatible = "qcom,memshare";



	qcom,client_1 {

		compatible = "qcom,memshare-peripheral";

		qcom,peripheral-size = <0x200000>;

		qcom,client-id = <0>;

		qcom,allocate-boot-time;

		label = "modem";

	};

};



Example 2:



qcom,memshare {

	compatible = "qcom,memshare";



	qcom,client_3 {

		compatible = "qcom,memshare-peripheral";

		qcom,peripheral-size = <0x500000>;

		qcom,client-id = <1>;

		qcom,allocate-on-request;

		qcom,guard-band;

		label = "modem";

	};

};
 
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drivers/soc/qcom/Kconfig

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@@ -644,6 +644,8 @@ config MSM_JTAGV8 
	  memory penalty.

endmenu



source "drivers/soc/qcom/memshare/Kconfig"



config QMP_DEBUGFS_CLIENT

	bool "Debugfs Client to communicate with AOP using QMP protocol"

	depends on DEBUG_FS

drivers/soc/qcom/Makefile

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@@ -41,6 +41,7 @@ obj-$(CONFIG_MSM_SERVICE_NOTIFIER) += service-notifier.o 
obj-$(CONFIG_MSM_SERVICE_LOCATOR) += service-locator.o

obj-$(CONFIG_MSM_SYSMON_GLINK_COMM) += sysmon-glink.o sysmon-qmi.o

obj-$(CONFIG_MSM_PIL_SSR_GENERIC) += subsys-pil-tz.o

obj-$(CONFIG_MEM_SHARE_QMI_SERVICE)		+= memshare/

obj-$(CONFIG_MSM_PIL)   +=      peripheral-loader.o

obj-$(CONFIG_MSM_CDSP_LOADER) += qdsp6v2/

obj-$(CONFIG_MSM_JTAGV8) += jtagv8.o jtagv8-etm.o

drivers/soc/qcom/memshare/Kconfig

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# SPDX-License-Identifier: GPL-2.0-only

#

# Shared Heap for external processors

#

config MEM_SHARE_QMI_SERVICE

       depends on QCOM_QMI_HELPERS

       bool "Shared Heap for external processors"

       help

		Memory Share Kernel QTI Messaging Interface Service

		receives requests from Modem Processor Sub System

		for heap alloc/free from Application Processor

		Sub System and send a response back to client with

		proper handle/address.

drivers/soc/qcom/memshare/Makefile

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# SPDX-License-Identifier: GPL-2.0-only

obj-$(CONFIG_MEM_SHARE_QMI_SERVICE) := heap_mem_ext_v01.o msm_memshare.o