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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-29 15:15:13 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-29 15:15:13 +0300
commit86f690e8bfd124c38940e7ad58875ef383003348 (patch)
treeb8261a4063b0601c4cdc638a75d0048c1e8da82d /drivers/hwtracing
parent45ea83f02dc090c477261ac6c93aa2097edca601 (diff)
parent72ef0f24d587d38f235334aef69afe611bba0d16 (diff)
downloadlinux-86f690e8bfd124c38940e7ad58875ef383003348.tar.xz
Merge tag 'stm-intel_th-for-greg-20180329' of git://git.kernel.org/pub/scm/linux/kernel/git/ash/stm into char-misc-next
Alexander writes: stm class/intel_th: Updates for 4.17 These are: * Mass conversion to GPL-2 SPDX header * Moved "hwtracing" to now its own submenu, to uncrowd the parent menu a bit * Added MAINTAINERS entry for drivers/hwtracing * Somewhat small Trace Hub fixes * Added ACPI glue layer for the Trace Hub * Added more module parameters to dummy_stm for better test coverage
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/Kconfig7
-rw-r--r--drivers/hwtracing/intel_th/Kconfig12
-rw-r--r--drivers/hwtracing/intel_th/Makefile3
-rw-r--r--drivers/hwtracing/intel_th/acpi.c79
-rw-r--r--drivers/hwtracing/intel_th/core.c31
-rw-r--r--drivers/hwtracing/intel_th/debug.c10
-rw-r--r--drivers/hwtracing/intel_th/debug.h10
-rw-r--r--drivers/hwtracing/intel_th/gth.c10
-rw-r--r--drivers/hwtracing/intel_th/gth.h10
-rw-r--r--drivers/hwtracing/intel_th/intel_th.h14
-rw-r--r--drivers/hwtracing/intel_th/msu.c10
-rw-r--r--drivers/hwtracing/intel_th/msu.h10
-rw-r--r--drivers/hwtracing/intel_th/pci.c10
-rw-r--r--drivers/hwtracing/intel_th/pti.c10
-rw-r--r--drivers/hwtracing/intel_th/pti.h10
-rw-r--r--drivers/hwtracing/intel_th/sth.c10
-rw-r--r--drivers/hwtracing/intel_th/sth.h10
-rw-r--r--drivers/hwtracing/stm/console.c10
-rw-r--r--drivers/hwtracing/stm/core.c10
-rw-r--r--drivers/hwtracing/stm/dummy_stm.c34
-rw-r--r--drivers/hwtracing/stm/heartbeat.c10
-rw-r--r--drivers/hwtracing/stm/policy.c10
-rw-r--r--drivers/hwtracing/stm/stm.h10
23 files changed, 161 insertions, 179 deletions
diff --git a/drivers/hwtracing/Kconfig b/drivers/hwtracing/Kconfig
new file mode 100644
index 000000000000..f68e025c5131
--- /dev/null
+++ b/drivers/hwtracing/Kconfig
@@ -0,0 +1,7 @@
+menu "HW tracing support"
+
+source "drivers/hwtracing/stm/Kconfig"
+
+source "drivers/hwtracing/intel_th/Kconfig"
+
+endmenu
diff --git a/drivers/hwtracing/intel_th/Kconfig b/drivers/hwtracing/intel_th/Kconfig
index 1b412f8a56b5..ca0527d588e9 100644
--- a/drivers/hwtracing/intel_th/Kconfig
+++ b/drivers/hwtracing/intel_th/Kconfig
@@ -25,6 +25,18 @@ config INTEL_TH_PCI
Say Y here to enable PCI Intel TH support.
+config INTEL_TH_ACPI
+ tristate "Intel(R) Trace Hub ACPI controller"
+ depends on ACPI
+ help
+ Intel(R) Trace Hub may exist as an ACPI device. This option enables
+ support glue layer for ACPI-based Intel TH. This typically implies
+ 'host debugger' mode, that is, the trace configuration and capture
+ is handled by an external debug host and corresponding controls will
+ not be available on the target.
+
+ Say Y here to enable ACPI Intel TH support.
+
config INTEL_TH_GTH
tristate "Intel(R) Trace Hub Global Trace Hub"
help
diff --git a/drivers/hwtracing/intel_th/Makefile b/drivers/hwtracing/intel_th/Makefile
index 880c9b5e8566..d9252fa8d9ca 100644
--- a/drivers/hwtracing/intel_th/Makefile
+++ b/drivers/hwtracing/intel_th/Makefile
@@ -6,6 +6,9 @@ intel_th-$(CONFIG_INTEL_TH_DEBUG) += debug.o
obj-$(CONFIG_INTEL_TH_PCI) += intel_th_pci.o
intel_th_pci-y := pci.o
+obj-$(CONFIG_INTEL_TH_ACPI) += intel_th_acpi.o
+intel_th_acpi-y := acpi.o
+
obj-$(CONFIG_INTEL_TH_GTH) += intel_th_gth.o
intel_th_gth-y := gth.o
diff --git a/drivers/hwtracing/intel_th/acpi.c b/drivers/hwtracing/intel_th/acpi.c
new file mode 100644
index 000000000000..87bc3744755f
--- /dev/null
+++ b/drivers/hwtracing/intel_th/acpi.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Intel(R) Trace Hub ACPI driver
+ *
+ * Copyright (C) 2017 Intel Corporation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+
+#include "intel_th.h"
+
+#define DRIVER_NAME "intel_th_acpi"
+
+static const struct intel_th_drvdata intel_th_acpi_pch = {
+ .host_mode_only = 1,
+};
+
+static const struct intel_th_drvdata intel_th_acpi_uncore = {
+ .host_mode_only = 1,
+};
+
+static const struct acpi_device_id intel_th_acpi_ids[] = {
+ { "INTC1000", (kernel_ulong_t)&intel_th_acpi_uncore },
+ { "INTC1001", (kernel_ulong_t)&intel_th_acpi_pch },
+ { "", 0 },
+};
+
+MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
+
+static int intel_th_acpi_probe(struct platform_device *pdev)
+{
+ struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
+ const struct acpi_device_id *id;
+ struct intel_th *th;
+
+ id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
+ if (!id)
+ return -ENODEV;
+
+ th = intel_th_alloc(&pdev->dev, (void *)id->driver_data,
+ pdev->resource, pdev->num_resources, -1);
+ if (IS_ERR(th))
+ return PTR_ERR(th);
+
+ adev->driver_data = th;
+
+ return 0;
+}
+
+static int intel_th_acpi_remove(struct platform_device *pdev)
+{
+ struct intel_th *th = platform_get_drvdata(pdev);
+
+ intel_th_free(th);
+
+ return 0;
+}
+
+static struct platform_driver intel_th_acpi_driver = {
+ .probe = intel_th_acpi_probe,
+ .remove = intel_th_acpi_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .acpi_match_table = intel_th_acpi_ids,
+ },
+};
+
+module_platform_driver(intel_th_acpi_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
+MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 1a023e30488c..da962aa2cef5 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub driver core
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -638,7 +630,8 @@ intel_th_subdevice_alloc(struct intel_th *th,
thdev->output.port = -1;
thdev->output.scratchpad = subdev->scrpd;
} else if (subdev->type == INTEL_TH_SWITCH) {
- thdev->host_mode = host_mode;
+ thdev->host_mode =
+ INTEL_TH_CAP(th, host_mode_only) ? true : host_mode;
th->hub = thdev;
}
@@ -737,7 +730,8 @@ static int intel_th_populate(struct intel_th *th)
struct intel_th_device *thdev;
/* only allow SOURCE and SWITCH devices in host mode */
- if (host_mode && subdev->type == INTEL_TH_OUTPUT)
+ if ((INTEL_TH_CAP(th, host_mode_only) || host_mode) &&
+ subdev->type == INTEL_TH_OUTPUT)
continue;
/*
@@ -813,7 +807,14 @@ intel_th_alloc(struct device *dev, struct intel_th_drvdata *drvdata,
struct resource *devres, unsigned int ndevres, int irq)
{
struct intel_th *th;
- int err;
+ int err, r;
+
+ if (irq == -1)
+ for (r = 0; r < ndevres; r++)
+ if (devres[r].flags & IORESOURCE_IRQ) {
+ irq = devres[r].start;
+ break;
+ }
th = kzalloc(sizeof(*th), GFP_KERNEL);
if (!th)
@@ -935,9 +936,13 @@ EXPORT_SYMBOL_GPL(intel_th_trace_disable);
int intel_th_set_output(struct intel_th_device *thdev,
unsigned int master)
{
- struct intel_th_device *hub = to_intel_th_device(thdev->dev.parent);
+ struct intel_th_device *hub = to_intel_th_hub(thdev);
struct intel_th_driver *hubdrv = to_intel_th_driver(hub->dev.driver);
+ /* In host mode, this is up to the external debugger, do nothing. */
+ if (hub->host_mode)
+ return 0;
+
if (!hubdrv->set_output)
return -ENOTSUPP;
diff --git a/drivers/hwtracing/intel_th/debug.c b/drivers/hwtracing/intel_th/debug.c
index 788a1f0a97ad..ff79063118a0 100644
--- a/drivers/hwtracing/intel_th/debug.c
+++ b/drivers/hwtracing/intel_th/debug.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* 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>
diff --git a/drivers/hwtracing/intel_th/debug.h b/drivers/hwtracing/intel_th/debug.h
index 88311bad3ba4..78bd7e4bf9ce 100644
--- a/drivers/hwtracing/intel_th/debug.h
+++ b/drivers/hwtracing/intel_th/debug.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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__
diff --git a/drivers/hwtracing/intel_th/gth.c b/drivers/hwtracing/intel_th/gth.c
index 018678ec3c13..8426b7970c14 100644
--- a/drivers/hwtracing/intel_th/gth.c
+++ b/drivers/hwtracing/intel_th/gth.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub Global Trace Hub
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hwtracing/intel_th/gth.h b/drivers/hwtracing/intel_th/gth.h
index f3d234251a12..6f2b0b930875 100644
--- a/drivers/hwtracing/intel_th/gth.h
+++ b/drivers/hwtracing/intel_th/gth.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel(R) Trace Hub Global Trace Hub (GTH) data structures
*
* 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_GTH_H__
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h
index 99ad563fc40d..780206dc9012 100644
--- a/drivers/hwtracing/intel_th/intel_th.h
+++ b/drivers/hwtracing/intel_th/intel_th.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel(R) Trace Hub data structures
*
* 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_H__
@@ -50,9 +42,11 @@ struct intel_th_output {
/**
* struct intel_th_drvdata - describes hardware capabilities and quirks
* @tscu_enable: device needs SW to enable time stamping unit
+ * @host_mode_only: device can only operate in 'host debugger' mode
*/
struct intel_th_drvdata {
- unsigned int tscu_enable : 1;
+ unsigned int tscu_enable : 1,
+ host_mode_only : 1;
};
#define INTEL_TH_CAP(_th, _cap) ((_th)->drvdata ? (_th)->drvdata->_cap : 0)
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
index dfb57eaa9f22..ede388309376 100644
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub Memory Storage Unit
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hwtracing/intel_th/msu.h b/drivers/hwtracing/intel_th/msu.h
index 9b710e4aa98a..9cc8aced6116 100644
--- a/drivers/hwtracing/intel_th/msu.h
+++ b/drivers/hwtracing/intel_th/msu.h
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub Memory Storage Unit (MSU) data structures
*
* 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_MSU_H__
diff --git a/drivers/hwtracing/intel_th/pci.c b/drivers/hwtracing/intel_th/pci.c
index c2a2ce8ee541..c2e55e5d97f6 100644
--- a/drivers/hwtracing/intel_th/pci.c
+++ b/drivers/hwtracing/intel_th/pci.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub pci driver
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hwtracing/intel_th/pti.c b/drivers/hwtracing/intel_th/pti.c
index e96a1fcb57b2..56694339cb06 100644
--- a/drivers/hwtracing/intel_th/pti.c
+++ b/drivers/hwtracing/intel_th/pti.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub PTI output driver
*
* Copyright (C) 2014-2016 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hwtracing/intel_th/pti.h b/drivers/hwtracing/intel_th/pti.h
index 30827be67b4c..e9381babc84c 100644
--- a/drivers/hwtracing/intel_th/pti.h
+++ b/drivers/hwtracing/intel_th/pti.h
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub PTI output data structures
*
* 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_STH_H__
diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index b03444624648..4b7ae47789d2 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub Software Trace Hub support
*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/hwtracing/intel_th/sth.h b/drivers/hwtracing/intel_th/sth.h
index f1390cd4f2ed..f97fc0c51739 100644
--- a/drivers/hwtracing/intel_th/sth.h
+++ b/drivers/hwtracing/intel_th/sth.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel(R) Trace Hub Software Trace Hub (STH) data structures
*
* 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_STH_H__
diff --git a/drivers/hwtracing/stm/console.c b/drivers/hwtracing/stm/console.c
index c9d9a8d2ff52..a00f65e21747 100644
--- a/drivers/hwtracing/stm/console.c
+++ b/drivers/hwtracing/stm/console.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Simple kernel console driver for STM devices
* Copyright (c) 2014, 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.
- *
* STM console will send kernel messages over STM devices to a trace host.
*/
diff --git a/drivers/hwtracing/stm/core.c b/drivers/hwtracing/stm/core.c
index f129869e05a9..05386b76465e 100644
--- a/drivers/hwtracing/stm/core.c
+++ b/drivers/hwtracing/stm/core.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* System Trace Module (STM) infrastructure
* Copyright (c) 2014, 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.
- *
* STM class implements generic infrastructure for System Trace Module devices
* as defined in MIPI STPv2 specification.
*/
diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c
index c5f94ca31c4d..38528ffdc0b3 100644
--- a/drivers/hwtracing/stm/dummy_stm.c
+++ b/drivers/hwtracing/stm/dummy_stm.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* A dummy STM device for stm/stm_source class testing.
* Copyright (c) 2014, 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.
- *
* STM class implements generic infrastructure for System Trace Module devices
* as defined in MIPI STPv2 specification.
*/
@@ -20,6 +12,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/stm.h>
+#include <uapi/linux/stm.h>
static ssize_t notrace
dummy_stm_packet(struct stm_data *stm_data, unsigned int master,
@@ -52,6 +45,18 @@ static unsigned int fail_mode;
module_param(fail_mode, int, 0600);
+static unsigned int master_min;
+
+module_param(master_min, int, 0400);
+
+static unsigned int master_max = STP_MASTER_MAX;
+
+module_param(master_max, int, 0400);
+
+static unsigned int nr_channels = STP_CHANNEL_MAX;
+
+module_param(nr_channels, int, 0400);
+
static int dummy_stm_link(struct stm_data *data, unsigned int master,
unsigned int channel)
{
@@ -68,14 +73,19 @@ static int dummy_stm_init(void)
if (nr_dummies < 0 || nr_dummies > DUMMY_STM_MAX)
return -EINVAL;
+ if (master_min > master_max ||
+ master_max > STP_MASTER_MAX ||
+ nr_channels > STP_CHANNEL_MAX)
+ return -EINVAL;
+
for (i = 0; i < nr_dummies; i++) {
dummy_stm[i].name = kasprintf(GFP_KERNEL, "dummy_stm.%d", i);
if (!dummy_stm[i].name)
goto fail_unregister;
- dummy_stm[i].sw_start = 0x0000;
- dummy_stm[i].sw_end = 0xffff;
- dummy_stm[i].sw_nchannels = 0xffff;
+ dummy_stm[i].sw_start = master_min;
+ dummy_stm[i].sw_end = master_max;
+ dummy_stm[i].sw_nchannels = nr_channels;
dummy_stm[i].packet = dummy_stm_packet;
dummy_stm[i].link = dummy_stm_link;
diff --git a/drivers/hwtracing/stm/heartbeat.c b/drivers/hwtracing/stm/heartbeat.c
index 3da7b673aab2..7db42395e131 100644
--- a/drivers/hwtracing/stm/heartbeat.c
+++ b/drivers/hwtracing/stm/heartbeat.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Simple heartbeat STM source driver
* Copyright (c) 2016, 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.
- *
* Heartbeat STM source will send repetitive messages over STM devices to a
* trace host.
*/
diff --git a/drivers/hwtracing/stm/policy.c b/drivers/hwtracing/stm/policy.c
index 33e9a1b6ea7c..3fd07e275b34 100644
--- a/drivers/hwtracing/stm/policy.c
+++ b/drivers/hwtracing/stm/policy.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* System Trace Module (STM) master/channel allocation policy management
* Copyright (c) 2014, 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.
- *
* A master/channel allocation policy allows mapping string identifiers to
* master and channel ranges, where allocation can be done.
*/
diff --git a/drivers/hwtracing/stm/stm.h b/drivers/hwtracing/stm/stm.h
index 4e8c6926260f..923571adc6f4 100644
--- a/drivers/hwtracing/stm/stm.h
+++ b/drivers/hwtracing/stm/stm.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* System Trace Module (STM) infrastructure
* Copyright (c) 2014, 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.
- *
* STM class implements generic infrastructure for System Trace Module devices
* as defined in MIPI STPv2 specification.
*/