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Commit 78432fc7 authored by Katish Paran's avatar Katish Paran
Browse files

memshare: Port and add snapshot of changes from msm-3.10 



Port the memshare driver and apply the following memshare driver
changes taken from msm-3.10 kernel branch as of msm-3.10 commit
4493220f	memshare: Boot time allocation and handling
		multiple clients
2ae4997a	memshare: Donot re-allocate the memory for the
		clients
059dcd59	memshare: Do not overwrite the response for the
		failure case
ed6d183f	memshare: Change the compatible property field
		for child node
b473fc4e2	memshare: Free the memory after XPU unlocking is
		done
95c114c39	memshare: Add query size api support for clients
60f310d4e	memshare: Change dma attribute to
		DMA_ATTR_NO_KERNEL_MAPPING
73075545	memshare: Remove local connection status variable
98dd2908	memshare: Place error check to prevent out of
		bound access

Change-Id: Iecf0a9828efd1d56c309a2af882c13ce36e7fc06
Signed-off-by: default avatarKatish Paran <kparan@codeaurora.org>
parent 62eb03b5

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.



Example:



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";

	};

};

drivers/soc/qcom/Kconfig

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@@ -584,4 +584,6 @@ config MSM_SERVICE_LOCATOR 
	  to what process domain exports the service, and which subsystem

	  that process domain will execute in.



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



endif # ARCH_MSM

drivers/soc/qcom/Makefile

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@@ -44,6 +44,7 @@ obj-$(CONFIG_MSM_SYSMON_GLINK_COMM) += sysmon-glink.o sysmon-qmi.o 
obj-$(CONFIG_MSM_SHARED_HEAP_ACCESS) += shared_memory.o

obj-y			+=	qdsp6v2/

obj-$(CONFIG_MSM_RPM_RBCPR_STATS_V2_LOG) += rpm_rbcpr_stats_v2.o

obj-$(CONFIG_MEM_SHARE_QMI_SERVICE)		+= memshare/

obj-$(CONFIG_CP_ACCESS64) += cpaccess64.o

obj-$(CONFIG_MSM_RPM_STATS_LOG) += rpm_stats.o rpm_master_stat.o

obj-$(CONFIG_MSM_RPM_LOG) += rpm_log.o

drivers/soc/qcom/memshare/Kconfig

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config MEM_SHARE_QMI_SERVICE

       depends on MSM_QMI_INTERFACE

       bool "Shared Heap for external processors"

       help

		Memory Share Kernel Qualcomm 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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obj-$(CONFIG_MEM_SHARE_QMI_SERVICE) := heap_mem_ext_v01.o msm_memshare.o
 
 No newline at end of file