Commit baf71316 authored Aug 07, 2017 by Lina Iyer

drivers: qcom: rpmh: add RPMH utility functions for TCS communication



Drivers that communicate with the TCS mailbox driver duplicate the same
functionality in managing memory for requests, threaded handling of
completion responses etc. Collect all such common functionality into a
simple set of API that abstracts complexity and optimizations in
communication with the mailbox controller.

The key benefits of using this API instead of directly using mailbox API
for QTI drivers are -
	* Caching of sleep and wake requests
	* Handling of completion callbacks
	* Memory management to avoid fragmenting kernel memory
	* Batch processing of requests

This is a snapshot as of 'commit b4a69c05b01172 ("drivers: mailbox:
rpmh-mailbox: rename file to match convention")'.

Change-Id: Id80b9312ff14537f9732acfa090f8e997158b63a
Signed-off-by: Lina Iyer <ilina@codeaurora.org>

parent 61555831

drivers/soc/qcom/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -304,3 +304,11 @@ config QCOM_COMMAND_DB
		help
		Command DB queries shared memory by key string for shared system
		resources

		config QTI_RPMH_API
		bool "QTI RPMH (h/w accelerators) Communication API"
		select MAILBOX
		select QTI_RPMH_MBOX
		help
		This option enables RPMH hardware communication for making shared
		resource requests on Qualcomm Technologies Inc SoCs.

drivers/soc/qcom/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@ obj-$(CONFIG_MSM_PIL_SSR_GENERIC) += subsys-pil-tz.o
		obj-$(CONFIG_MSM_PIL) += peripheral-loader.o
		obj-$(CONFIG_QCOM_BUS_SCALING) += msm_bus/
		obj-$(CONFIG_QCOM_COMMAND_DB) += cmd-db.o
		obj-$(CONFIG_QTI_RPMH_API) += rpmh.o

		ifdef CONFIG_MSM_SUBSYSTEM_RESTART
		obj-y += subsystem_notif.o