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Date: Wed, 2 Jan 2019 13:58:39 +0200
From: Peter Ujfalusi <peter.ujfalusi@...com>
To: Lokesh Vutla <lokeshvutla@...com>, <marc.zyngier@....com>,
Nishanth Menon <nm@...com>,
Santosh Shilimkar <ssantosh@...nel.org>,
Rob Herring <robh+dt@...nel.org>, <tglx@...utronix.de>,
<jason@...edaemon.net>
CC: Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, Tero Kristo <t-kristo@...com>,
Sekhar Nori <nsekhar@...com>,
Device Tree Mailing List <devicetree@...r.kernel.org>
Subject: Re: [PATCH v4 00/13] Add support for TISCI irqchip drivers
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@...com>
> 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
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