[PATCH] coresight: Adding ABI documentation

From: mathieu . poirier
Date: Mon Nov 10 2014 - 16:06:58 EST

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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

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Next message: Linus Torvalds: "Re: compiler bug gcc4.6/4.7 with ACCESS_ONCE and workarounds"
Previous message: Paul Bolle: "Re: [GIT PULL for v3.18-rc1] media updates"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]