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intel_th: Add driver infrastructure for Intel(R) Trace Hub devices Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that produce, switch and output trace data from multiple hardware and software sources over several types of trace output ports encoded in System Trace Protocol (MIPI STPv2) and is intended to perform full system debugging. For these subdevices, we create a bus, where they can be discovered and configured by userspace software. This patch creates this bus infrastructure, three types of devices (source, output, switch), resource allocation, some callback mechanisms to facilitate communication between the subdevices' drivers and some common sysfs attributes. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:14 +08:00
config INTEL_TH
tristate "Intel(R) Trace Hub controller"
intel_th: INTEL_TH should depend on HAS_DMA If NO_DMA=y: ERROR: "dma_free_coherent" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "dma_alloc_coherent" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined! ERROR: "dma_supported" [drivers/hwtracing/intel_th/intel_th.ko] undefined! Add a dependency on HAS_DMA to fix this. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-12-22 23:25:16 +08:00
depends on HAS_DMA
intel_th: Add driver infrastructure for Intel(R) Trace Hub devices Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that produce, switch and output trace data from multiple hardware and software sources over several types of trace output ports encoded in System Trace Protocol (MIPI STPv2) and is intended to perform full system debugging. For these subdevices, we create a bus, where they can be discovered and configured by userspace software. This patch creates this bus infrastructure, three types of devices (source, output, switch), resource allocation, some callback mechanisms to facilitate communication between the subdevices' drivers and some common sysfs attributes. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:14 +08:00
help
Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that
produce, switch and output trace data from multiple hardware and
software sources over several types of trace output ports encoded
in System Trace Protocol (MIPI STPv2) and is intended to perform
full system debugging.
This option enables intel_th bus and common code used by TH
subdevices to interact with each other and hardware and for
platform glue layers to drive Intel TH devices.
Say Y here to enable Intel(R) Trace Hub controller support.
if INTEL_TH
intel_th: Add pci glue layer for Intel(R) Trace Hub This patch adds basic support for PCI-based Intel TH devices. It requests 2 bars (configuration registers for the subdevices and STH channel MMIO region) and calls into Intel TH core code to create the bus with subdevices etc. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:15 +08:00
config INTEL_TH_PCI
tristate "Intel(R) Trace Hub PCI controller"
depends on PCI
help
Intel(R) Trace Hub may exist as a PCI device. This option enables
support glue layer for PCI-based Intel TH.
Say Y here to enable PCI Intel TH support.
intel_th: Add Global Trace Hub driver Global Trace Hub (GTH) is the central component of Intel TH architecture; it carries out switching between the trace sources and trace outputs, can enable/disable tracing, perform STP encoding, internal buffering, control backpressure from outputs to sources and so on. This property is also reflected in the software model; GTH (switch) driver is required for the other subdevices to probe, because it matches trace output devices against its output ports and configures them accordingly. It also implements an interface for output ports to request trace enabling or disabling and a few other useful things. For userspace, it provides an attribute group "masters", which allows configuration of per-master trace output destinations for up to master 255 and "256+" meaning "masters 256 and above". It also provides an attribute group to discover and configure some of the parameters of its output ports, called "outputs". Via these the user can set up data retention policy for an individual output port or check if it is in reset state. Signed-off-by: Laurent Fert <laurent.fert@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:16 +08:00
config INTEL_TH_GTH
tristate "Intel(R) Trace Hub Global Trace Hub"
help
Global Trace Hub (GTH) is the central component of the
Intel TH infrastructure and acts as a switch for source
and output devices. This driver is required for other
Intel TH subdevices to initialize.
Say Y here to enable GTH subdevice of Intel(R) Trace Hub.
intel_th: Add Software Trace Hub driver Software Trace Hub (STH) is a trace source device in the Intel TH architecture, it generates data that then goes through the switch into one or several output ports. STH collects data from software sources using the stm device class abstraction. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:17 +08:00
config INTEL_TH_STH
tristate "Intel(R) Trace Hub Software Trace Hub support"
depends on STM
help
Software Trace Hub (STH) enables trace data from software
trace sources to be sent out via Intel(R) Trace Hub. It
uses stm class device to interface with its sources.
Say Y here to enable STH subdevice of Intel(R) Trace Hub.
intel_th: Add Memory Storage Unit driver Memory Storage Unit (MSU) is a trace output device that collects trace data to system memory. It consists of 2 independent Memory Storage Controllers (MSCs). This driver provides userspace interfaces to configure in-memory tracing parameters, such as contiguous (high-order allocation) buffer or multiblock (scatter list) buffer mode, wrapping (data overwrite) and number and sizes of windows in multiblock mode. Userspace can read the buffers via mmap()ing or read()ing of the corresponding device node. Signed-off-by: Laurent Fert <laurent.fert@intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:18 +08:00
config INTEL_TH_MSU
tristate "Intel(R) Trace Hub Memory Storage Unit"
help
Memory Storage Unit (MSU) trace output device enables
storing STP traces to system memory. It supports single
and multiblock modes of operation and provides read()
and mmap() access to the collected data.
Say Y here to enable MSU output device for Intel TH.
intel_th: Add PTI output driver Parallel Trace Interface (PTI) unit is a trace output device that sends data over a PTI port. The driver provides interfaces to configure bus width, bus clock divider and mode. Tracing is enabled via output device's "active" attribute. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:19 +08:00
config INTEL_TH_PTI
tristate "Intel(R) Trace Hub PTI output"
help
Parallel Trace Interface unit (PTI) is a trace output device
of Intel TH architecture that facilitates STP trace output via
a PTI port.
Say Y to enable PTI output of Intel TH data.
intel_th: Add driver infrastructure for Intel(R) Trace Hub devices Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that produce, switch and output trace data from multiple hardware and software sources over several types of trace output ports encoded in System Trace Protocol (MIPI STPv2) and is intended to perform full system debugging. For these subdevices, we create a bus, where they can be discovered and configured by userspace software. This patch creates this bus infrastructure, three types of devices (source, output, switch), resource allocation, some callback mechanisms to facilitate communication between the subdevices' drivers and some common sysfs attributes. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-09-22 20:47:14 +08:00
config INTEL_TH_DEBUG
bool "Intel(R) Trace Hub debugging"
depends on DEBUG_FS
help
Say Y here to enable debugging.
endif