From: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> --- .../ABI/testing/sysfs-bus-coresight-devices-etb10 | 24 ++ .../ABI/testing/sysfs-bus-coresight-devices-etm3x | 253 +++++++++++++++++++++ .../ABI/testing/sysfs-bus-coresight-devices-funnel | 12 + .../ABI/testing/sysfs-bus-coresight-devices-tmc | 8 + MAINTAINERS | 1 + 5 files changed, 298 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 new file mode 100644 index 0000000..4b8d6ec --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etb10 @@ -0,0 +1,24 @@ +What: /sys/bus/coresight/devices/<memory_map>.etb/enable_sink +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Add/remove a sink from a trace path. There can be multiple + source for a single sink. + ex: echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink + +What: /sys/bus/coresight/devices/<memory_map>.etb/status +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) List various control and status registers. The specific + layout and content is driver specific. + +What: /sys/bus/coresight/devices/<memory_map>.etb/trigger_cntr +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Disables write access to the Trace RAM by stopping the + formatter after a defined number of words have been stored + following the trigger event. The number of 32-bit words written + into the Trace RAM following the trigger event is equal to the + value stored in this register+1 (from ARM ETB-TRM). diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x new file mode 100644 index 0000000..b4d0b99 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm3x @@ -0,0 +1,253 @@ +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/enable_source +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Enable/disable tracing on this specific trace entiry. + Enabling a source implies the source has been configured + properly and a sink has been identidifed for it. The path + of coresight components linking the source to the sink is + configured and managed automatically by the coresight framework. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/status +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) List various control and status registers. The specific + layout and content is driver specific. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_idx +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: Select which address comparator or pair (of comparators) to + work with. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_acctype +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with @addr_idx. Specifies + characteristics about the address comparator being configure, + for example the access type, the kind of instruction to trace, + processor contect ID to trigger on, etc. Individual fields in + the access type register may vary on the version of the trace + entity. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_range +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with @addr_idx. Specifies the range of + addresses to trigger on. Inclusion or exclusion is specificed + in the corresponding access type register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_single +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with @addr_idx. Specifies the single + address to trigger on, highly influenced by the configuration + options of the corresponding access type register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_start +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with @addr_idx. Specifies the single + address to start tracing on, highly influenced by the + configuration options of the corresponding access type register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/addr_stop +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with @addr_idx. Specifies the single + address to stop tracing on, highly influenced by the + configuration options of the corresponding access type register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/cntr_idx +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Specifies the counter to work on. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/cntr_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with cntr_idx, give access to the + counter event register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/cntr_val +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with cntr_idx, give access to the + counter value register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/cntr_rld_val +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with cntr_idx, give access to the + counter reload value register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/cntr_rld_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used in conjunction with cntr_idx, give access to the + counter reload event register. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/ctxid_idx +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Specifies the index of the context ID register to be + selected. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/ctxid_mask +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Mask to apply to all the context ID comparator. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/ctxid_val +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Used with the ctxid_idx, specify with context ID to trigger + on. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/enable_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines which event triggers a trace. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/etmsr +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Gives access to the ETM status register, which holds + programming information and status on certains events. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/fifofull_level +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Number of byte left in the fifo before considering it full. + Depending on the tracer's version, can also hold threshold for + data suppression. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/mode +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Interface with the driver's 'mode' field, controlling + various aspect of the trace entity such as time stamping, + context ID size and cycle accurate tracing. Driver specific + and bound to change depending on the driver. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_addr_cmp +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) Provides the number of address comparators pairs accessible + on a trace unit, as specified by bit 3:0 of register ETMCCR. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_cntr +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) Provides the number of counters accessible on a trace unit, + as specified by bit 15:13 of register ETMCCR. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/nr_ctxid_cmp +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) Provides the number of context ID comparator available on a + trace unit, as specified by bit 25:24 of register ETMCCR. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/reset +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (W) Cancels all configuration on a trace unit and set it back + to its boot configuration. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_12_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 1 to state 2. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_13_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 1 to state 3. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_21_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 2 to state 1. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_23_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 2 to state 3. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_31_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 3 to state 1. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/seq_32_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines the event that causes the sequencer to transition + from state 3 to state 2. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/curr_seq_state +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (R) Holds the current state of the sequencer. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/sync_freq +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Holds the trace synchronization frequency value - must be + programmed with the various implementation behavior in mind. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/timestamp_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines an event that requests the insertion of a timestamp + into the trace stream. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/traceid +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Holds the trace ID that will appear in the trace stream + coming from this trace entity. + +What: /sys/bus/coresight/devices/<memory_map>.[etm|ptm]/trigger_event +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Define the event that controls the trigger. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel b/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel new file mode 100644 index 0000000..d75acda --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-funnel @@ -0,0 +1,12 @@ +What: /sys/bus/coresight/devices/<memory_map>.funnel/funnel_ctrl +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Enables the slave ports and defines the hold time of the + slave ports. + +What: /sys/bus/coresight/devices/<memory_map>.funnel/priority +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Defines input port priority order. diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc new file mode 100644 index 0000000..f38cded5 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-tmc @@ -0,0 +1,8 @@ +What: /sys/bus/coresight/devices/<memory_map>.tmc/trigger_cntr +Date: November 2014 +KernelVersion: 3.19 +Contact: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx> +Description: (RW) Disables write access to the Trace RAM by stopping the + formatter after a defined number of words have been stored + following the trigger event. Additional interface for this + driver are expected to be added as it matures. diff --git a/MAINTAINERS b/MAINTAINERS index 3995263..7d18080 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -925,6 +925,7 @@ S: Maintained F: drivers/coresight/* F: Documentation/trace/coresight.txt F: Documentation/devicetree/bindings/arm/coresight.txt +F: Documentation/ABI/testing/sysfs-bus-coresight-devices-* ARM/CORGI MACHINE SUPPORT M: Richard Purdie <rpurdie@xxxxxxxxx> -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
