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path: root/include/linux/coresight.h
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2018-07-15coresight: Introduce support for Coresight Address Translation UnitSuzuki K Poulose1-0/+1
Add the initial support for Coresight Address Translation Unit, which augments the TMC in Coresight SoC-600 by providing an improved Scatter Gather mechanism. CATU is always connected to a single TMC-ETR and converts the AXI address with a translated address (from a given SG table with specific format). The CATU should be programmed in pass through mode and enabled even if the ETR doesn't use the translation by CATU. This patch provides mechanism to enable/disable the CATU always in the pass through mode. We reuse the existing ports mechanism to link the TMC-ETR to the connected CATU. i.e, TMC-ETR:output_port0 -> CATU:input_port0 Reference manual for CATU component is avilable in version r2p0 of : "Arm Coresight System-on-Chip SoC-600 Technical Reference Manual". Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-15coresight: Add helper device typeSuzuki K Poulose1-0/+24
Add a new coresight device type, which do not belong to any of the existing types, i.e, source, sink, link etc. A helper device could be connected to a coresight device, which could augment the functionality of the coresight device. This is intended to cover Coresight Address Translation Unit (CATU) devices, which provide improved Scatter Gather mechanism for TMC ETR. The idea is that the helper device could be controlled by the driver of the device it is attached to (in this case ETR), transparent to the generic coresight driver (and paths). The operations include enable(), disable(), both of which could accept a device specific "data" which the driving device and the helper device could share. Since they don't appear in the coresight "path" tracked by software, we have to ensure that they are powered up/down whenever the master device is turned on. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-15coresight: Cleanup device subtype structSuzuki K Poulose1-9/+12
Clean up our struct a little bit by using a union instead of a struct for tracking the subtype of a device. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-15coresight: Cleanup platform description dataSuzuki K Poulose1-2/+0
Nobody uses the "clk" field in struct coresight_platform_data. Remove it. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-15coresight: Remove function coresight_vpid_to_pid()Mathieu Poirier1-20/+0
Now that we prevent users from using contextID tracing when PID namespaces are involved there is no client for function coresight_vpid_to_pid(). As such simply remove it. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Kim Phillips <kim.phillips@arm.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-14coresight: Moving framework and drivers to SPDX identifierMathieu Poirier1-10/+3
Moving all kernel side CoreSight framework and drivers to SPDX identifier. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: refactor with function of_coresight_get_cpuLeo Yan1-0/+3
This is refactor to add function of_coresight_get_cpu(), so it's used to retrieve CPU id for coresight component. Finally can use it as a common function for multiple places. Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-06-09coresight: use const for device_node structuresLeo Yan1-3/+4
Almost low level functions from open firmware have used const to qualify device_node structures, so add const for device_node parameters in of_coresight related functions. Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-16perf/core: Keep AUX flags in the output handleWill Deacon1-1/+1
In preparation for adding more flags to perf AUX records, introduce a separate API for setting the flags for a session, rather than appending more bool arguments to perf_aux_output_end. This allows to set each flag at the time a corresponding condition is detected, instead of tracking it in each driver's private state. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: vince@deater.net Link: http://lkml.kernel.org/r/20170220133352.17995-3-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-08-31coresight: etm-perf: pass struct perf_event to source::enable/disable()Mathieu Poirier1-2/+3
With this commit [1] address range filter information is now found in the struct hw_perf_event::addr_filters. As such pass the event itself to the coresight_source::enable/disable() functions so that both event attribute and filter can be accessible for configuration. [1] 'commit 375637bc5249 ("perf/core: Introduce address range filtering")' Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-21coresight: etb10: implementing AUX APIMathieu Poirier1-2/+19
Adding an ETB10 specific AUX area operations to be used by the perf framework when events are initialised. Part of this operation involves modeling the mmap'ed area based on the specific ways a sink buffer gathers information. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-21coresight: etb10: adding operation mode for sink->enable()Mathieu Poirier1-1/+1
Adding an operation mode to the sink->enable() API in order to prevent simultaneous access from different callers. TPIU and TMC won't be supplemented with the AUX area API immediately and as such ignore the new mode. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-21coresight: etm3x: implementing perf_enable/disable() APIMathieu Poirier1-2/+4
That way traces can be enabled and disabled automatically from the Perf subystem using the PMU abstraction. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-21coresight: etm3x: adding operation mode for etm_enable()Mathieu Poirier1-1/+1
Adding a new mode to source API enable() in order to distinguish where the request comes from. That way it is possible to perform different operations based on where the request was issued from. The ETM4x driver is also modified to keep in sync with the new interface. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-21coresight: associating path with session rather than tracerMathieu Poirier1-2/+0
When using the Coresight framework from the sysFS interface a tracer is always handling a single session and as such, a path can be associated with a tracer. But when supporting multiple session per tracer there is no guarantee that sessions will always have the same path from source to sink. This patch is removing the automatic association between path and tracers. The building of a path and enablement of the components in the path are decoupled, allowing for the association of a path with a session rather than a tracer. To keep backward functionality with the current sysFS access methods a per-cpu place holder is used to keep a handle on the path built when tracers are enabled. Lastly APIs to build paths and enable tracers are made public so that other subsystem can interact with the Coresight framework. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-08coresight: implementing 'cpu_id()' APIMathieu Poirier1-0/+3
Other than plainly parsing the device tree there is no way to know which CPU a tracer is affined to. As such adding an interface to lookup the CPU field enclosed in the etm_drvdata structure that was initialised at boot time. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-07coresight: fixing typographical errorMathieu Poirier1-1/+1
Tracing gets enabled _for_ a source rather than _from_ a source. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-08-05coresight: Fix implicit inclusion of linux/sched.hMark Brown1-0/+1
The patch "Coresight: Add an interface for supporting ETM3/4 Context ID tracing" adds uses of find_task_by_vpid() and task_pid_nr() from linux/sched.h but does not include that header causing build errors in at least an ARM allmodconfig where it is not implicitly included. Add an explicit include to fix that. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-08-05Coresight: Add an interface for supporting ETM3/4 Context ID tracingChunyan Zhang1-0/+20
If PID namespace is enabled, everytime users configure the Context ID register to trace the specific process, there needs to be a translation between the real PID seen from the kernel and VPID seen from the namespace in which the user's process resides . This patch just adds the translation interface for ETMs. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-04coresight: remove the unnecessary function coresight_is_bit_set()Kaixu Xia1-3/+0
This function coresight_is_bit_set() isn't called, so we should remove it. Signed-off-by: Kaixu Xia <xiakaixu@huawei.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight: Fixing wrong #ifdef/#endif placementMathieu Poirier1-5/+5
Fixing problem reported by: https://lkml.org/lkml/2015/1/6/86 The #ifdef/#endif is wrong and prevents the stub of function of_get_coresight_platform_data() from being visible when CONFIG_OF is not defined. Moving CONFIG_OF condition out of CONFIG_CORESIGHT, making them both independent. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight: remove the unused macro CORESIGHT_DEBUGFS_ENTRYXia Kaixu1-9/+0
Debugfs isn't used for coresight configuration, so the macro CORESIGHT_DEBUGFS_ENTRY is unnecessary, just remove it. Signed-off-by: Xia Kaixu <xiakaixu@huawei.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-27coresight: fixed comments in coresight.hPankaj Dubey1-3/+3
fixes following minor issues in code comments in coresight.h - typo %s/enpoint/endpoint - alignment of comment section for struct coresight_desc - correction of comment for struct coresight_connection and struct coresight_device. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-08coresight: add CoreSight core layer frameworkPratik Patel1-0/+263
CoreSight components are compliant with the ARM CoreSight architecture specification and can be connected in various topologies to suit a particular SoC tracing needs. These trace components can generally be classified as sources, links and sinks. Trace data produced by one or more sources flows through the intermediate links connecting the source to the currently selected sink. The CoreSight framework provides an interface for the CoreSight trace drivers to register themselves with. It's intended to build up a topological view of the CoreSight components and configure the correct serie of components on user input via sysfs. For eg., when enabling a source, the framework builds up a path consisting of all the components connecting the source to the currently selected sink(s) and enables all of them. The framework also supports switching between available sinks and provides status information to user space applications through the debugfs interface. Signed-off-by: Pratik Patel <pratikp@codeaurora.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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