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path: root/drivers/coresight
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2015-04-03coresight: moving to new "hwtracing" directoryMathieu Poirier13-5780/+0
Keeping drivers related to HW tracing on ARM, i.e coresight, under "drivers/coresight" doesn't make sense when other architectures start rolling out technologies of the same nature. As such creating a new "drivers/hwtracing" directory where all drivers of the same kind can reside, reducing namespace pollution under "drivers/". Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03coresight-tmc: Adding a status interface to sysfsMathieu Poirier1-0/+56
Knowing the state of various control register is always useful for degging and tuning. As such add an entry in sysfs that expose to userspace the most important registers. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03coresight: adding the LINKSINK block as a sink typeXia Kaixu1-1/+3
>From the TMC TRM, the ETF can be configured as buffer mode, so ETF can be a sink type. Signed-off-by: Xia Kaixu <kaixu.xia@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03coresight: Adding coresight support for arm64 architectureMathieu Poirier1-0/+61
Most CoreSight blocks are 64-bit ready. As such move configuration entries from "arch/arm/Kconfig.config" to the driver's subdirectory and source the newly created Kconfig from architecture specific Kconfig.debug files. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03coresight: fixing compilation warnings picked up by 64bit compilerMathieu Poirier2-4/+4
Compiling coresight drivers with a 64-bit compiler highlights a couple of formatting issues, which are fixed by this patch. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-03coresight: making cpu index lookup arm64 compliantMathieu Poirier1-12/+6
Function "get_logical_index()" is not available on arm64. Instead of adding the function simply using "of_get_cpu_node()" and comparing the return value with cpu handles yields the same result. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-03-26coresight-replicator: constify of_device_id arrayFabian Frederick1-1/+1
of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-04coresight: fix function etm_writel_cp14() parameter orderKaixu Xia1-1/+1
Function etm_writel_cp14() takes an offset and a value rather than the other way around, something this patch is correcting. The semantic remains the same since it is only a function stub. 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>
2015-02-04coresight-etm: remove check for unknown Kconfig macroPaul Bolle1-7/+1
The CoreSight ETM/PTM driver contains a check for a CONFIG_CORESIGHT_SOURCE_ETM_DEFAULT_ENABLE macro. But there's no related Kconfig symbol CORESIGHT_SOURCE_ETM_DEFAULT_ENABLE. Remove that check and the single line of code it hides. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-04coresight: fixing CPU hwid lookup in device treeMathieu Poirier1-7/+9
Some DT specification will represent CPU nodes with address cells greater than one, making the current code fail. Using the proper retrieval helper function ensure the correct hwid for CPUs is read properly with different address cell size. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-04coresight: remove the extra spacesKaixu Xia2-2/+2
There are some extra spaces, so just remove them from these lines. 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>
2015-02-04coresight: fix the link between orphan connection and newly added deviceKaixu Xia1-4/+5
When founding a component that has orphan connections, we should validate if it match the newly added device. If it does not match, only then should the @still_orphan flag should be set. The tested result as follows. pre: /sys/bus/coresight/devices # echo 1 > e3c42000.etb/enable_sink /sys/bus/coresight/devices # echo 1 > e3c7c000.ptm/enable_source [ 15.527692] Unable to handle kernel NULL pointer dereference at virtual address 00000124 [ 15.555142] pgd = c2294000 [ 15.564226] [00000124] *pgd=3d393831, *pte=00000000, *ppte=00000000 [ 15.585391] Internal error: Oops: 817 [#1] PREEMPT SMP ARM [ 15.603807] CPU: 0 PID: 144 Comm: sh Not tainted 3.17.0-rc1-12634-g1222fe0-dirty #3 [ 15.629490] task: ed3803c0 ti: c213a000 task.ti: c213a000 [ 15.647627] PC is at coresight_build_paths+0x1c/0x314 [ 15.664579] LR is at coresight_build_paths+0x6c/0x314 [ 15.681526] pc : [<c02da20c>] lr : [<c02da25c>] psr: 20000013 [ 15.681526] sp : c213be88 ip : c02da800 fp : 00000000 [ 15.720023] r10: 00000002 r9 : ed13250c r8 : 00000001 [ 15.737549] r7 : c213bee8 r6 : ffffffea r5 : 00000000 r4 : 00000124 [ 15.759446] r3 : ed216f24 r2 : 00000001 r1 : c213bee8 r0 : 00000000 [ 15.781346] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user post: /sys/bus/coresight/devices # echo 1 > e3c42000.etb/enable_sink /sys/bus/coresight/devices # echo 1 > e3c7c000.ptm/enable_source [ 59.934255] coresight-etb10 e3c42000.etb: ETB enabled [ 59.951317] coresight-replicator replicator0: REPLICATOR enabled [ 59.971581] coresight-funnel e3c41000.funnel: FUNNEL inport 0 enabled [ 59.993334] coresight-etm3x e3c7c000.ptm: ETM tracing enabled 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>
2015-02-03coresight: fix the replicator subtype valueKaixu Xia1-1/+1
According to the classification, the type of replicator is link, so the subtype should also be link_subtype. 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 validity check on remote deviceKaixu Xia1-1/+1
A validity check should be made on the remote device, i.e rdev, rather than the current device. 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: fix comment in of_coresight.cKaixu Xia1-1/+1
Outports is a member of the struct pdata and should be a better choice. 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: fix typo in comment in of_coresight.cKaixu Xia1-1/+1
Debugfs isn't used for coresight configuration, so the corresponding comments should be changed. 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-etm: Fix initial trace ID valueMathieu Poirier1-1/+5
The coresight TRM specify that a component's trace ID should be other than 0. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight-tpiu: use module_amba_driver to simplify the codeWei Yongjun1-11/+1
module_amba_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight-tmc: use module_amba_driver to simplify the codeWei Yongjun1-11/+1
module_amba_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight-funnel: use module_amba_driver to simplify the codeWei Yongjun1-11/+1
module_amba_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight-etb: use module_amba_driver to simplify the codeWei Yongjun1-11/+1
module_amba_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-12coresight-etm: unlock on error paths in mode_store()Dan Carpenter1-2/+8
There are some missing unlocks on the error paths. Fixes: a939fc5a71ad ('coresight-etm: add CoreSight ETM/PTM driver') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-26coresight-replicator: remove .owner field for driverPankaj Dubey1-1/+0
There is no need of .owner field for driver using module_platform_driver. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-26coresight: fix typo in comment in coresight-priv.hPankaj Dubey1-1/+1
fixes a typo %s/eveyone/everyone/ in function CS_UNLOCK. Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07coresight-etm: add CoreSight ETM/PTM driverPratik Patel4-0/+2771
This driver manages CoreSight ETM (Embedded Trace Macrocell) that supports processor tracing. Currently supported version are ARM ETMv3.x and PTM1.x. Signed-off-by: Pratik Patel <pratikp@codeaurora.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> coresight-etm3x: adding missing error checking Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-11-07coresight-replicator: add CoreSight Replicator driverPratik Patel2-1/+140
This driver manages non-configurable CoreSight Replicator that takes a single input trace data stream and replicates it to produce two identical trace data output streams. Replicators are typically used to route single interleaved trace data stream to two or more sinks. 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>
2014-11-07coresight-funnel: add CoreSight Funnel driverPratik Patel2-0/+269
This driver manages CoreSight Funnel which acts as a link. Funnels have multiple input ports (typically 8) each of which represents an input trace data stream. These multiple input trace data streams are interleaved into a single output stream coming out of the Funnel. 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>
2014-11-07coresight-etb: add CoreSight ETB driverPratik Patel2-0/+538
This driver manages CoreSight ETB (Embedded Trace Buffer) which acts as a circular buffer sink collecting generated trace data. 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>
2014-11-07coresight-tpiu: add CoreSight TPIU driverPratik Patel2-0/+218
This driver manages CoreSight TPIU (Trace Port Interface Unit) which acts as a sink. TPIU is typically connected to some offchip hardware hosting a storage buffer. 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>
2014-11-07coresight-tmc: add CoreSight TMC driverPratik Patel2-0/+777
This driver manages CoreSight TMC (Trace Memory Controller) which can act as a link or a sink depending upon its configuration. It can present itself as an ETF (Embedded Trace FIFO) or ETR (Embedded Trace Router). ETF when configured in circular buffer mode acts as a trace collection sink. When configured in HW fifo mode it acts as link. ETR always acts as a sink and can be used to route data to memory allocated in RAM. 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>
2014-11-07coresight: add CoreSight core layer frameworkPratik Patel4-0/+989
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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