On Tue, Nov 19, 2019 at 11:19:03PM +0000, Mike Leach wrote: > Adds new coresight-cti.yaml file describing the bindings required to define > CTI in the device trees. > > Adds an include file to dt-bindings/arm to define constants describing > common signal functionality used in CoreSight and generic usage. > > Signed-off-by: Mike Leach <mike.leach@xxxxxxxxxx> > --- > .../bindings/arm/coresight-cti.yaml | 303 ++++++++++++++++++ > .../devicetree/bindings/arm/coresight.txt | 7 + > MAINTAINERS | 2 + > include/dt-bindings/arm/coresight-cti-dt.h | 37 +++ > 4 files changed, 349 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/coresight-cti.yaml > create mode 100644 include/dt-bindings/arm/coresight-cti-dt.h > > diff --git a/Documentation/devicetree/bindings/arm/coresight-cti.yaml b/Documentation/devicetree/bindings/arm/coresight-cti.yaml > new file mode 100644 > index 000000000000..882c72f1c798 > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/coresight-cti.yaml > @@ -0,0 +1,303 @@ > +# SPDX-License-Identifier: GPL-2.0 > +# Copyright 2019 Linaro Ltd. > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/arm/coresight-cti.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: ARM Coresight Cross Trigger Interface (CTI) device. > + > +description: | > + The CoreSight Embedded Cross Trigger (ECT) consists of CTI devices connected > + to one or more CoreSight components and/or a CPU, with CTIs interconnected in > + a star topology via the CTM (which is not programmable). The ECT components > + are not part of the trace generation data path and are thus not part of the > + CoreSight graph described in the general CoreSight bindings file > + coresight.txt. > + > + The CTI component properties define the connections between the individual > + CTI and the components it is directly connected to, consisting of input and > + output hardware trigger signals. CTIs can have a maximum number of input and > + output hardware trigger signals (8 each for v1 CTI, 32 each for v2 CTI). The > + number is defined at design time, the maximum of each defined in the DEVID > + register. > + > + CTIs are interconnected in a star topology via the CTM, using a number of > + programmable channels usually 4, but again implementation defined and > + described in the DEVID register. The star topology is not required to be > + described in the bindings as the actual connections are software > + programmable. > + > + In general the connections between CTI and components via the trigger signals > + are implementation defined, other than when v8 core and ETM is present. > + The v8 architecture defines the required signal connections between CPU core > + and CTI, and ETM and CTI, if the ETM if present. > + > + When only minimal information is available for the CTI trigger connections, > + then a minimal driver binding can be declare with no explicit trigger > + signals. This will result in the using the DEVID register to set the > + input and output triggers and channels in use. Any user / client > + application will require additional information on the connections > + between the CTI and other components for correct operation. This minimal > + binding may be used when using the Integration Control registers to > + discover connections between CTI and other CoreSight components, > + > + Certain triggers between CoreSight devices and the CTI have specific types > + and usages. These can be defined along with the signal indexes with the > + constants defined in <dt-bindings/arm/coresight-cti-dt.h> > + > + For example a CTI connected to a core will usually have a DBGREQ signal. This > + is defined in the binding as type PE_EDBGREQ. These types will appear in an > + optional array alongside the signal indexes. Omitting types will default all > + signals to GEN_IO. > + > + Note that some hardware trigger signals can be connected to non-CoreSight > + components (e.g. UART etc) depending on hardware implementation. > + > +maintainers: > + - Mike Leach <mike.leach@xxxxxxxxxx> > + > +allOf: > + - $ref: /schemas/arm/primecell.yaml# > + > +# Need a custom select here or 'arm,primecell' will match on lots of nodes > +select: > + properties: > + compatible: > + contains: > + enum: > + - arm,coresight-cti > + required: > + - compatible > + > +properties: > + $nodename: > + pattern: "^cti(@[0-9a-f,]+)*$" > + compatible: > + items: > + - const: arm,coresight-cti > + - const: arm,primecell > + > + reg: > + items: > + - description: device programming registers > + > + arm,cti-v8-arch: > + type: boolean > + description: > + This CTI follows the v8 architecturally mandated layout for a CTI. > + Bindings declaring this must declare a cpu, and optionally a single > + arm,cs-dev-assoc may be present to define an attached ETM. No additional > + trig-conns nodes are permitted. The driver will build a connection model > + according to architectural requirements. This will include a filter on > + the CPU dbgreq signal as described above. > + > + cpu: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/phandle > + description: Handle to cpu this device is associated with. > + > + arm,cti-ctm-id: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + Defines the CTM this CTI is connected to, in large systems with multiple > + separate CTI/CTM nets. Typically multi-socket systems where the CTM is > + propagated between sockets. > + > + arm,cs-dev-assoc: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/phandle > + description: > + defines a phandle reference to an associated CoreSight trace device. > + When the associated trace device is enabled, then the respective CTI > + will be enabled. Use in a trig-conns node, or in CTI base node when > + arm,cti-v8-arch present. If the associated device has not been registered > + then the node name will be stored as the connection name for later > + resolution. If the associated device is not a CoreSight device or not > + registered then the node name will remain the connection name and > + automatic enabling will not occur. > + > +patternProperties: > + '^trig_conns@[0-9]+$': > + type: object > + description: > + A trigger connections child node which describes the trigger signals > + between this CTI and another hardware device. This device may be a CPU, > + CoreSight device, any other hardware device or simple external IO lines. > + The connection may have both input and output triggers, or only one or the > + other. > + > + properties: > + > + arm,trig-in-sigs: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 32 > + description: > + List of CTI trigger in signal numbers in use by a trig-conns node. > + > + arm,trig-in-types: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 32 > + description: > + List of constants representing the types for the CTI trigger in > + signals. Types in this array match to the corresponding signal in the > + arm,trig-in-sigs array. If the -types array is smaller, or omitted > + completely, then the types will default to GEN_IO. > + > + arm,trig-out-sigs: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 32 > + description: > + List of CTI trigger out signal numbers in use by a trig-conns node. > + > + arm,trig-out-types: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 32 > + description: > + List of constants representing the types for the CTI trigger out > + signals. Types in this array match to the corresponding signal > + in the arm,trig-out-sigs array. If the "-types" array is smaller, > + or omitted completely, then the types will default to GEN_IO. > + > + arm,trig-filters: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 32 > + description: > + List of CTI trigger out signals that will be blocked from becoming > + active, unless filtering is disabled on the driver. > + > + arm,trig-conn-name: > + allOf: > + - $ref: /schemas/types.yaml#/definitions/string > + description: > + Defines a connection name that will be displayed, if the cpu or > + arm,cs-dev-assoc properties are not being used in this connection. > + Principle use for CTI that are connected to non-CoreSight devices, or > + external IO. > + > + anyOf: > + - required: > + - arm,trig-in-sigs > + - required: > + - arm,trig-out-sigs > + oneOf: > + - required: > + - arm,trig-conn-name > + - required: > + - cpu > + - required: > + - arm,cs-dev-assoc > + > +required: > + - compatible > + - reg > + - clocks > + - clock-names > + > +examples: > + # minimum CTI definition. DEVID register used to set number of triggers. > + - | > + cti@20020000 { > + compatible = "arm,coresight-cti", "arm,primecell"; > + reg = <0x20020000 0x1000>; > + > + clocks = <&soc_smc50mhz>; > + clock-names = "apb_pclk"; > + }; > + # v8 architecturally defined CTI - CPU + ETM connections generated by the > + # driver according to the v8 architecture specification. > + - | > + cti@859000 { > + compatible = "arm,coresight-cti", "arm,primecell"; > + reg = <0x859000 0x1000>; > + > + clocks = <&soc_smc50mhz>; > + clock-names = "apb_pclk"; > + > + arm,cti-v8-arch; > + cpu = <&CPU1>; > + arm,cs-dev-assoc = <&etm1>; > + }; > + # Implementation defined CTI - CPU + ETM connections explicitly defined.. > + # Shows use of type constants from dt-bindings/arm/coresight-cti-dt.h > + - | > + #include <dt-bindings/arm/coresight-cti-dt.h> > + > + cti@858000 { > + compatible = "arm,coresight-cti", "arm,primecell"; > + reg = <0x858000 0x1000>; > + > + clocks = <&soc_smc50mhz>; > + clock-names = "apb_pclk"; > + > + arm,cti-ctm-id = <1>; > + > + trig-conns@0 { > + arm,trig-in-sigs = <4 5 6 7>; > + arm,trig-in-types = <ETM_EXTOUT > + ETM_EXTOUT > + ETM_EXTOUT > + ETM_EXTOUT>; > + arm,trig-out-sigs = <4 5 6 7>; > + arm,trig-out-types = <ETM_EXTIN > + ETM_EXTIN > + ETM_EXTIN > + ETM_EXTIN>; > + arm,cs-dev-assoc = <&etm0>; > + }; > + > + trig-conns@1 { > + cpu = <&CPU0>; > + arm,trig-in-sigs = <0 1>; > + arm,trig-in-types = <PE_DBGTRIGGER > + PE_PMUIRQ>; > + arm,trig-out-sigs=<0 1 2 >; > + arm,trig-out-types = <PE_EDBGREQ > + PE_DBGRESTART > + PE_CTIIRQ>; > + > + arm,trig-filters = <0>; > + }; > + }; > + # Implementation defined CTI - none CoreSight component connections. > + - | > + cti@20110000 { > + compatible = "arm,coresight-cti", "arm,primecell"; > + reg = <0 0x20110000 0 0x1000>; > + > + clocks = <&soc_smc50mhz>; > + clock-names = "apb_pclk"; > + > + trig-conns@0 { > + arm,trig-in-sigs=<0>; > + arm,trig-in-types=<GEN_INTREQ>; > + arm,trig-out-sigs=<0>; > + arm,trig-out-types=<GEN_HALTREQ>; > + arm,trig-conn-name = "sys_profiler"; > + }; > + > + trig-conns@1 { > + arm,trig-out-sigs=<2 3>; > + arm,trig-out-types=<GEN_HALTREQ GEN_RESTARTREQ>; > + arm,trig-conn-name = "watchdog"; > + }; > + > + trig-conns@2 { > + arm,trig-in-sigs=<1 6>; > + arm,trig-in-types=<GEN_HALTREQ GEN_RESTARTREQ>; > + arm,trig-conn-name = "g_counter"; > + }; > + }; > + > +... I'm not sure what the "..." is there for. It is not present in the example schema[1] but I can find the patter in other .yaml files. As such I will let Rob decide on that part. Reviewed-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> [1]. Documentation/devicetree/bindings/example-schema.yaml > \ No newline at end of file > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt > index d02c42d21f2f..846f6daae71b 100644 > --- a/Documentation/devicetree/bindings/arm/coresight.txt > +++ b/Documentation/devicetree/bindings/arm/coresight.txt > @@ -45,6 +45,10 @@ its hardware characteristcs. > - Coresight Address Translation Unit (CATU) > "arm,coresight-catu", "arm,primecell"; > > + - Coresight Cross Trigger Interface (CTI): > + "arm,coresight-cti", "arm,primecell"; > + See coresight-cti.yaml for full CTI definitions. > + > * reg: physical base address and length of the register > set(s) of the component. > > @@ -72,6 +76,9 @@ its hardware characteristcs. > * reg-names: the only acceptable values are "stm-base" and > "stm-stimulus-base", each corresponding to the areas defined in "reg". > > +* Required properties for Coresight Cross Trigger Interface (CTI) > + See coresight-cti.yaml for full CTI definitions. > + > * Required properties for devices that don't show up on the AMBA bus, such as > non-configurable replicators and non-configurable funnels: > > diff --git a/MAINTAINERS b/MAINTAINERS > index 9de89d75dbcc..8d01a74068f7 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -1608,9 +1608,11 @@ R: Suzuki K Poulose <suzuki.poulose@xxxxxxx> > L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers) > S: Maintained > F: drivers/hwtracing/coresight/* > +F: include/dt-bindings/arm/coresight-cti-dt.h > F: Documentation/trace/coresight/* > F: Documentation/devicetree/bindings/arm/coresight.txt > F: Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt > +F: Documentation/devicetree/bindings/arm/coresight-cti.yaml > F: Documentation/ABI/testing/sysfs-bus-coresight-devices-* > F: tools/perf/arch/arm/util/pmu.c > F: tools/perf/arch/arm/util/auxtrace.c > diff --git a/include/dt-bindings/arm/coresight-cti-dt.h b/include/dt-bindings/arm/coresight-cti-dt.h > new file mode 100644 > index 000000000000..61e7bdf8ea6e > --- /dev/null > +++ b/include/dt-bindings/arm/coresight-cti-dt.h > @@ -0,0 +1,37 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * This header provides constants for the defined trigger signal > + * types on CoreSight CTI. > + */ > + > +#ifndef _DT_BINDINGS_ARM_CORESIGHT_CTI_DT_H > +#define _DT_BINDINGS_ARM_CORESIGHT_CTI_DT_H > + > +#define GEN_IO 0 > +#define GEN_INTREQ 1 > +#define GEN_INTACK 2 > +#define GEN_HALTREQ 3 > +#define GEN_RESTARTREQ 4 > +#define PE_EDBGREQ 5 > +#define PE_DBGRESTART 6 > +#define PE_CTIIRQ 7 > +#define PE_PMUIRQ 8 > +#define PE_DBGTRIGGER 9 > +#define ETM_EXTOUT 10 > +#define ETM_EXTIN 11 > +#define SNK_FULL 12 > +#define SNK_ACQCOMP 13 > +#define SNK_FLUSHCOMP 14 > +#define SNK_FLUSHIN 15 > +#define SNK_TRIGIN 16 > +#define STM_ASYNCOUT 17 > +#define STM_TOUT_SPTE 18 > +#define STM_TOUT_SW 19 > +#define STM_TOUT_HETE 20 > +#define STM_HWEVENT 21 > +#define ELA_TSTART 22 > +#define ELA_TSTOP 23 > +#define ELA_DBGREQ 24 > +#define CTI_TRIG_MAX 25 > + > +#endif /*_DT_BINDINGS_ARM_CORESIGHT_CTI_DT_H */ > -- > 2.17.1 >
