On Wed 20 Jun 06:26 PDT 2018, Raju P L S S S N wrote: > From: "Raju P.L.S.S.S.N" <rplsssn@xxxxxxxxxxxxxx> > Acked-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Regards, Bjorn > Changes in v13: > - Add missing Signed-off-by in commit text > > Changes in v12: > - Rename ctrlr to client in rsc_drv > - Fix Bot reported errors - 'err' may be used uninitialized > - Rebase on top of v4.18-rc1 > > Changes in v11: > - move rpmh_request to rpmh-internal.h > - Associate rpmh_ctrl to rsc_drv > - Remove EXPORT_SYMBOL for rpmh_tx_done > - Remove IS_ERR check for ctrlr > - Remove rsc_drv instance from rpmh_ctrlr > - Initialize cache & batch cache in probe > > Changes in v10: > - Remove export.h inclusion as suggested by Doug > - Remove rsc_drv_list > - Add EXPORT_SYMBOL > - Remove wait_count as suggested by Doug > - Free memory if cache_batch returns error as suggested by Doug > - Add batch requests to list and simplify error handling as > - return ERR_PTR if invalidate fails > > Changes in v9: > - Remove EXPORT_SYMBOL as suggested by Doug > - Add Reviewed-by tags > - Rename lock variable as suggested by Doug > - Add WARN_ON if completion timeout occurs as suggested by Doug > - Fix the bound checks as suggested by Matthias > - Improve comments as suggested by Doug > - Add check for freeing dynamically allocated request object > - Rename label as suggested by Doug > - Fix IS_ERR_OR_NULL check to IS_ERR as suggested by Doug > - Add check to call rpmh_rsc_invalidate if -EAGAIN is retured > as suggested by Doug > > Changes in v8: > - Bounds check for cmd_cache > - Describe interrupts to other DRVs in DT bindings > - Rebase on top of 4.17-rc3 > > Changes in v7: > - Rename 'm' and 'n' and use tcs_id and cmd_id instead > - Bug fix in find_match() and other review comments from Matthias > - Spinlock around get_rpmh_ctrlr() > - DT documentation example fixes > - Rebase on top of 4.16-rc2 > > Changes in v6: > - Remove tasklet in rpmh-rsc.c > - Remove rpmh_client and use struct device * instead > - Variable changes and bug fixes > - DT binding changes to describe all DRVs in the RSC > - Documentation and comment fixes > > Changes in v5: > - Add Reviewed-by tags > - Rebase on top of 4.16 > > Changes in v4: > - Rename variables as suggested by Stephen and Evan > - Lot of minor syntax and style fixes > - Fix FTRACE compilation error > - Improve doc comments and DT description > > Changes in v3: > - Address Steven's comments in FTRACE > - Fix DT documentation as suggested by Rob H > - Fix error handling in IRQ handler as suggested by Evan > - Remove locks in rpmh_flush() > - Improve comments > > Changes in v2: > - Added sleep/wake, async and batch requests support > - Addressed Bjorn's comments > - Private FTRACE for drivers/soc/qcom as suggested by Steven > - Sparse checked on these patches > - Use SPDX license commenting sytle > > This set of patches add the ability for platform drivers to make use of shared > resources in newer Qualcomm SoCs like SDM845. Resources that are shared between > multiple processors in a SoC are generally controlled by a dedicated remote > processor. The remote processor (Resource Power Manager or RPM in previous QCOM > SoCs) receives requests for resource state from other processors using the > shared resource, aggregates the request and applies the result on the shared > resource. SDM845 advances this concept and uses h/w (hardened I/P) blocks for > aggregating requests and applying the result on the resource. The resources > could be clocks, regulators or bandwidth requests for buses. This new > architecture is called RPM-hardened or RPMH in short. > > Since this communication mechanism is completely hardware driven without a > processor intervention on the remote end, existing mechanisms like RPM-SMD are > no longer useful. Also, there is no serialization of data or is data is written > to a shared memory in this new format. The data used is different, unsigned 32 > bits are used for representing an address, data and header. Each resource's > property is a unique u32 address and have pre-defined set of property specific > valid values. A request that comprises of <header, addr, data> is sent by > writing to a set of registers from Linux and transmitted to the remote slave > through an internal bus. The remote end aggregates this request along with > requests from other processors for the <addr> and applies the result. > > The hardware block that houses this functionality is called Resource State > Coordinator or RSC. Inside the RSC are set of slots for sending RPMH requests > called Trigger Commands Sets (TCS). The set of patches are for writing the > requests into these TCSes and sending them to hardened IP blocks. > > The driver design is split into two components. The RSC driver housed in > rpmh-rsc.c and the set of library functions in rpmh.c that frame the request and > transmit it using the controller. This first set of patches allow a simple > synchronous request to be made by the platform drivers. Future patches will add > more functionality that cater to complex drivers and use cases. > > Please consider reviewing this patchset. > > v1: https://www.spinics.net/lists/devicetree/msg210980.html > v2: https://lkml.org/lkml/2018/2/15/852 > v3: https://lkml.org/lkml/2018/3/2/801 > v4: https://lkml.org/lkml/2018/3/9/979 > v5: https://lkml.org/lkml/2018/4/5/480 > v6: https://lkml.org/lkml/2018/4/19/914 > v7: https://lkml.org/lkml/2018/5/2/779 > v8: https://lkml.org/lkml/2018/5/9/729 > v9: https://lkml.org/lkml/2018/5/24/530 > v10: https://lkml.org/lkml/2018/6/11/542 > v11: https://lkml.org/lkml/2018/6/18/860 > v12: https://lkml.org/lkml/2018/6/19/535 > > Lina Iyer (10): > drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs > dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs > drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE > drivers: qcom: rpmh: add RPMH helper functions > drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS > drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS > drivers: qcom: rpmh: cache sleep/wake state requests > drivers: qcom: rpmh: allow requests to be sent asynchronously > drivers: qcom: rpmh: add support for batch RPMH request > drivers: qcom: rpmh-rsc: allow active requests from wake TCS > > .../devicetree/bindings/soc/qcom/rpmh-rsc.txt | 137 +++++ > drivers/soc/qcom/Kconfig | 10 + > drivers/soc/qcom/Makefile | 4 + > drivers/soc/qcom/rpmh-internal.h | 114 ++++ > drivers/soc/qcom/rpmh-rsc.c | 682 +++++++++++++++++++++ > drivers/soc/qcom/rpmh.c | 513 ++++++++++++++++ > drivers/soc/qcom/trace-rpmh.h | 82 +++ > include/dt-bindings/soc/qcom,rpmh-rsc.h | 14 + > include/soc/qcom/rpmh.h | 51 ++ > include/soc/qcom/tcs.h | 56 ++ > 10 files changed, 1663 insertions(+) > create mode 100644 Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt > create mode 100644 drivers/soc/qcom/rpmh-internal.h > create mode 100644 drivers/soc/qcom/rpmh-rsc.c > create mode 100644 drivers/soc/qcom/rpmh.c > create mode 100644 drivers/soc/qcom/trace-rpmh.h > create mode 100644 include/dt-bindings/soc/qcom,rpmh-rsc.h > create mode 100644 include/soc/qcom/rpmh.h > create mode 100644 include/soc/qcom/tcs.h > > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project > -- To unsubscribe from this list: send the line "unsubscribe linux-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
