FAILED: patch "[PATCH] intel_th: Add driver infrastructure for Intel(R) Trace Hub" failed to apply to 4.4-stable tree
Subsystems (5)
[email protected]
maintainerThe patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 39f4034693b7c7bd1fe4cb58c93259d600f55561 Mon Sep 17 00:00:00 2001
From: Alexander Shishkin <[email protected]>
Date: Tue, 22 Sep 2015 15:47:14 +0300
Subject: [PATCH] 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.
Documentation/ABI/testing/sysfs-bus-intel_th-output-devices new file +13 -0
@@ -0,0 +1,13 @@ +What: /sys/bus/intel_th/devices/<intel_th_id>-<device><id>/active +Date: June 2015 +KernelVersion: 4.3 +Contact: Alexander Shishkin <[email protected]> +Description: (RW) Writes of 1 or 0 enable or disable trace output to this + output device. Reads return current status. + +What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/port +Date: June 2015 +KernelVersion: 4.3 +Contact: Alexander Shishkin <[email protected]> +Description: (RO) Port number, corresponding to this output device on the + switch (GTH).
Documentation/trace/intel_th.txt new file +99 -0
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drivers/Kconfig +2 -0
@@ -190,4 +190,6 @@ source "drivers/nvmem/Kconfig" source "drivers/hwtracing/stm/Kconfig" +source "drivers/hwtracing/intel_th/Kconfig" + endmenu
drivers/Makefile +1 -0
@@ -165,6 +165,7 @@ obj-$(CONFIG_PERF_EVENTS) += perf/ obj-$(CONFIG_RAS) += ras/ obj-$(CONFIG_THUNDERBOLT) += thunderbolt/ obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/ +obj-y += hwtracing/intel_th/ obj-$(CONFIG_STM) += hwtracing/stm/ obj-$(CONFIG_ANDROID) += android/ obj-$(CONFIG_NVMEM) += nvmem/
drivers/hwtracing/intel_th/Kconfig new file +24 -0
@@ -0,0 +1,24 @@ +config INTEL_TH + tristate "Intel(R) Trace Hub controller" + help + Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that + produce, switch and output trace data from multiple hardware and + software sources over several types of trace output ports encoded + in System Trace Protocol (MIPI STPv2) and is intended to perform + full system debugging. + + This option enables intel_th bus and common code used by TH + subdevices to interact with each other and hardware and for + platform glue layers to drive Intel TH devices. + + Say Y here to enable Intel(R) Trace Hub controller support. + +if INTEL_TH + +config INTEL_TH_DEBUG + bool "Intel(R) Trace Hub debugging" + depends on DEBUG_FS + help + Say Y here to enable debugging. + +endif
drivers/hwtracing/intel_th/Makefile new file +3 -0
@@ -0,0 +1,3 @@ +obj-$(CONFIG_INTEL_TH) += intel_th.o +intel_th-y := core.o +intel_th-$(CONFIG_INTEL_TH_DEBUG) += debug.o
drivers/hwtracing/intel_th/core.c new file +692 -0
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drivers/hwtracing/intel_th/debug.c new file +36 -0
@@ -0,0 +1,36 @@ +/* +* Intel(R) Trace Hub driver debugging +* +* Copyright (C) 2014-2015 Intel Corporation. +* +* This program is free software; you can redistribute it and/or modify it +* under the terms and conditions of the GNU General Public License, +* version 2, as published by the Free Software Foundation. +* +* This program is distributed in the hope it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +* more details. +*/ + +#include <linux/types.h> +#include <linux/device.h> +#include <linux/debugfs.h> + +#include "intel_th.h" +#include "debug.h" + +struct dentry *intel_th_dbg; + +void intel_th_debug_init (void ) +{ + intel_th_dbg =debugfs_create_dir ("intel_th" ,NULL ); +if (IS_ERR (intel_th_dbg)) + intel_th_dbg =NULL ; +} + +void intel_th_debug_done (void ) +{ +debugfs_remove (intel_th_dbg); + intel_th_dbg =NULL ; +}
drivers/hwtracing/intel_th/debug.h new file +34 -0
@@ -0,0 +1,34 @@ +/* +* Intel(R) Trace Hub driver debugging +* +* Copyright (C) 2014-2015 Intel Corporation. +* +* This program is free software; you can redistribute it and/or modify it +* under the terms and conditions of the GNU General Public License, +* version 2, as published by the Free Software Foundation. +* +* This program is distributed in the hope it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +* more details. +*/ + +#ifndef __INTEL_TH_DEBUG_H__ +#define __INTEL_TH_DEBUG_H__ + +#ifdef CONFIG_INTEL_TH_DEBUG +extern struct dentry *intel_th_dbg; + +void intel_th_debug_init (void ); +void intel_th_debug_done (void ); +#else +static inline void intel_th_debug_init (void ) +{ +} + +static inline void intel_th_debug_done (void ) +{ +} +#endif + +#endif /* __INTEL_TH_DEBUG_H__ */
drivers/hwtracing/intel_th/intel_th.h new file +244 -0
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