On 27/12/2018 8.08, Lokesh Vutla wrote: > TI AM65x SoC based on K3 architecture, introduced support for Events > which are message based interrupts with minimal latency. These events > are not compatible with regular interrupts and are valid only through > an event transport lane. An Interrupt Aggregator(INTA) is introduced > to convert these events to interrupts. INTA can also group 64 events > into a single interrupt. Now the SoC has many peripherals and a large > number of event sources (time sync or DMA), the use of events is > completely dependent on a user's specific application, which drives a > need for maximum flexibility in which event sources are used in the > system. It is also completely up to software control as to how the > events are serviced. > > Because of the huge flexibility there are certain standard peripherals > (like GPIO etc)where all interrupts cannot be directly corrected to host > interrupt controller. For this purpose, Interrupt Router(INTR) is > introduced in the SoC. INTR just does a classic interrupt redirection. > > So the SoC has 3 types of interrupt controllers: > - GIC500 > - Interrupt Router > - Interrupt Aggregator > > Below is a diagrammatic view of how SoC integration of these interrupt > controllers:(https://pastebin.ubuntu.com/p/9ngV3jdGj2/) > > Device Index-x Device Index-y > | | > | | > .... > \ / > \ / > \ (global events) / > +---------------------------+ +---------+ > | | | | > | INTA | | GPIO | > | | | | > +---------------------------+ +---------+ > | (vint) | > | | > \|/ | > +---------------------------+ | > | |<-------+ > | INTR | > | | > +---------------------------+ > | > | > \|/ (gic irq) > +---------------------------+ > | | > | GIC | > | | > +---------------------------+ > > While at it, TISCI abstracts the handling of all above IRQ routes where > interrupt sources are not directly connected to host interrupt controller. > That would be configuration of Interrupt Aggregator and Interrupt Router. > > This series adds support for: > - TISCI commands needed for IRQ configuration > - Interrupt Router(INTR) and Interrupt Aggregator(INTA) drivers With the compilation fix to drivers/irqchip/irq-ti-sci-inta.c dmatest and audio works with the series: Tested-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx> > Changes since v3: > - Fix documentation for Interrupt Router driver > - Rebased on top of latest next. > - Fully tested with DMA(using out of tree patches) > - Fixed a build error with allmodconfig > > Grygorii Strashko (1): > firmware: ti_sci: Add support to get TISCI handle using of_phandle > > Lokesh Vutla (11): > firmware: ti_sci: Add support for RM core ops > firmware: ti_sci: Add support for IRQ management > firmware: ti_sci: Add helper apis to manage resources > dt-bindings: irqchip: Introduce TISCI Interrupt router bindings > irqchip: ti-sci-intr: Add support for Interrupt Router driver > genirq/msi: Add support for allocating single MSI for a device > genirq/msi: Add support for .msi_unprepare callback > soc: ti: Add MSI domain support for K3 Interrupt Aggregator > dt-bindings: irqchip: Introduce TISCI Interrupt Aggregator bindings > irqchip: ti-sci-inta: Add support for Interrupt Aggregator driver > soc: ti: am6: Enable interrupt controller drivers > > Peter Ujfalusi (1): > firmware: ti_sci: Add RM mapping table for am654 > > .../bindings/arm/keystone/ti,sci.txt | 3 +- > .../interrupt-controller/ti,sci-inta.txt | 74 ++ > .../interrupt-controller/ti,sci-intr.txt | 85 ++ > MAINTAINERS | 4 + > drivers/firmware/ti_sci.c | 848 ++++++++++++++++++ > drivers/firmware/ti_sci.h | 102 +++ > drivers/irqchip/Kconfig | 23 + > drivers/irqchip/Makefile | 2 + > drivers/irqchip/irq-ti-sci-inta.c | 561 ++++++++++++ > drivers/irqchip/irq-ti-sci-intr.c | 310 +++++++ > drivers/soc/ti/Kconfig | 11 + > drivers/soc/ti/Makefile | 1 + > drivers/soc/ti/k3_inta_msi.c | 193 ++++ > include/linux/irqdomain.h | 1 + > include/linux/msi.h | 12 + > include/linux/soc/ti/k3_inta_msi.h | 22 + > include/linux/soc/ti/ti_sci_protocol.h | 169 ++++ > kernel/irq/msi.c | 72 +- > 18 files changed, 2470 insertions(+), 23 deletions(-) > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt > create mode 100644 drivers/irqchip/irq-ti-sci-inta.c > create mode 100644 drivers/irqchip/irq-ti-sci-intr.c > create mode 100644 drivers/soc/ti/k3_inta_msi.c > create mode 100644 include/linux/soc/ti/k3_inta_msi.h > - Péter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
