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Commit 08b48de0 authored by Manoj Prabhu B's avatar Manoj Prabhu B
Browse files

memshare: Add snapshot of memshare driver 



The patch is a snapshot of memshare driver taken from msm-4.9 commit
<fce0dd25c02> (Merge "usb: phy: snps: Use external resistor (REXT)
for HSTX tuning").

Change-Id: I529f40a089d5c7f1baa2aeb5112f8e1aeb3a48a9
Signed-off-by: default avatarManoj Prabhu B <bmanoj@codeaurora.org>
parent 4875db87

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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@@ -568,6 +568,8 @@ config MSM_SUSPEND_STATS_FIRST_BUCKET 
endif # MSM_IDLE_STATS

endif # MSM_PM



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



config MSM_PERFORMANCE

	tristate "msm performance driver to support userspace fmin/fmax request"

	default n

drivers/soc/qcom/Makefile

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@@ -37,6 +37,7 @@ 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

obj-$(CONFIG_MSM_SYSMON_QMI_COMM) += sysmon-qmi.o

obj-$(CONFIG_MEM_SHARE_QMI_SERVICE)		+= memshare/

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

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

obj-$(CONFIG_QCOM_RUN_QUEUE_STATS) += rq_stats.o

drivers/soc/qcom/memshare/Kconfig

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config MEM_SHARE_QMI_SERVICE

       depends on QCOM_QMI_HELPERS

       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