From fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Wed, 23 Aug 2017 14:45:25 -0500
Subject: Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
---
 drivers/acpi/debug.c | 345 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 345 insertions(+)
 create mode 100644 drivers/acpi/debug.c

(limited to 'drivers/acpi/debug.c')

diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
new file mode 100644
index 0000000..c483968
--- /dev/null
+++ b/drivers/acpi/debug.c
@@ -0,0 +1,345 @@
+/*
+ * debug.c - ACPI debug interface to userspace.
+ */
+
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+#include <asm/uaccess.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acglobal.h>
+
+#define _COMPONENT		ACPI_SYSTEM_COMPONENT
+ACPI_MODULE_NAME("debug");
+
+#ifdef MODULE_PARAM_PREFIX
+#undef MODULE_PARAM_PREFIX
+#endif
+#define MODULE_PARAM_PREFIX "acpi."
+
+struct acpi_dlayer {
+	const char *name;
+	unsigned long value;
+};
+struct acpi_dlevel {
+	const char *name;
+	unsigned long value;
+};
+#define ACPI_DEBUG_INIT(v)	{ .name = #v, .value = v }
+
+static const struct acpi_dlayer acpi_debug_layers[] = {
+	ACPI_DEBUG_INIT(ACPI_UTILITIES),
+	ACPI_DEBUG_INIT(ACPI_HARDWARE),
+	ACPI_DEBUG_INIT(ACPI_EVENTS),
+	ACPI_DEBUG_INIT(ACPI_TABLES),
+	ACPI_DEBUG_INIT(ACPI_NAMESPACE),
+	ACPI_DEBUG_INIT(ACPI_PARSER),
+	ACPI_DEBUG_INIT(ACPI_DISPATCHER),
+	ACPI_DEBUG_INIT(ACPI_EXECUTER),
+	ACPI_DEBUG_INIT(ACPI_RESOURCES),
+	ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
+	ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
+	ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
+	ACPI_DEBUG_INIT(ACPI_COMPILER),
+	ACPI_DEBUG_INIT(ACPI_TOOLS),
+
+	ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
+	ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
+};
+
+static const struct acpi_dlevel acpi_debug_levels[] = {
+	ACPI_DEBUG_INIT(ACPI_LV_INIT),
+	ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
+	ACPI_DEBUG_INIT(ACPI_LV_INFO),
+
+	ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
+	ACPI_DEBUG_INIT(ACPI_LV_PARSE),
+	ACPI_DEBUG_INIT(ACPI_LV_LOAD),
+	ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
+	ACPI_DEBUG_INIT(ACPI_LV_EXEC),
+	ACPI_DEBUG_INIT(ACPI_LV_NAMES),
+	ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
+	ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
+	ACPI_DEBUG_INIT(ACPI_LV_TABLES),
+	ACPI_DEBUG_INIT(ACPI_LV_VALUES),
+	ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
+	ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
+	ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
+	ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
+
+	ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
+	ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
+	ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
+
+	ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
+	ACPI_DEBUG_INIT(ACPI_LV_THREADS),
+	ACPI_DEBUG_INIT(ACPI_LV_IO),
+	ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
+
+	ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
+	ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
+	ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
+	ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
+};
+
+/* --------------------------------------------------------------------------
+                              FS Interface (/sys)
+   -------------------------------------------------------------------------- */
+static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
+	int result = 0;
+	int i;
+
+	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
+
+	for(i = 0; i <ARRAY_SIZE(acpi_debug_layers); i++) {
+		result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
+					acpi_debug_layers[i].name,
+					acpi_debug_layers[i].value,
+					(acpi_dbg_layer & acpi_debug_layers[i].value) ? '*' : ' ');
+	}
+	result += sprintf(buffer+result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
+					ACPI_ALL_DRIVERS,
+					(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
+					ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
+					ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
+	result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", acpi_dbg_layer);
+
+	return result;
+}
+
+static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
+	int result = 0;
+	int i;
+
+	result = sprintf(buffer, "%-25s\tHex        SET\n", "Description");
+
+	for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
+		result += sprintf(buffer+result, "%-25s\t0x%08lX [%c]\n",
+				     acpi_debug_levels[i].name,
+				     acpi_debug_levels[i].value,
+				     (acpi_dbg_level & acpi_debug_levels[i].
+				      value) ? '*' : ' ');
+	}
+	result += sprintf(buffer+result, "--\ndebug_level = 0x%08X (* = enabled)\n",
+			     acpi_dbg_level);
+
+	return result;
+}
+
+module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
+module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
+
+static char trace_method_name[6];
+module_param_string(trace_method_name, trace_method_name, 6, 0644);
+static unsigned int trace_debug_layer;
+module_param(trace_debug_layer, uint, 0644);
+static unsigned int trace_debug_level;
+module_param(trace_debug_level, uint, 0644);
+
+static int param_set_trace_state(const char *val, struct kernel_param *kp)
+{
+	int result = 0;
+
+	if (!strncmp(val, "enable", strlen("enable") - 1)) {
+		result = acpi_debug_trace(trace_method_name, trace_debug_level,
+					  trace_debug_layer, 0);
+		if (result)
+			result = -EBUSY;
+		goto exit;
+	}
+
+	if (!strncmp(val, "disable", strlen("disable") - 1)) {
+		int name = 0;
+		result = acpi_debug_trace((char *)&name, trace_debug_level,
+					  trace_debug_layer, 0);
+		if (result)
+			result = -EBUSY;
+		goto exit;
+	}
+
+	if (!strncmp(val, "1", 1)) {
+		result = acpi_debug_trace(trace_method_name, trace_debug_level,
+					  trace_debug_layer, 1);
+		if (result)
+			result = -EBUSY;
+		goto exit;
+	}
+
+	result = -EINVAL;
+exit:
+	return result;
+}
+
+static int param_get_trace_state(char *buffer, struct kernel_param *kp)
+{
+	if (!acpi_gbl_trace_method_name)
+		return sprintf(buffer, "disable");
+	else {
+		if (acpi_gbl_trace_flags & 1)
+			return sprintf(buffer, "1");
+		else
+			return sprintf(buffer, "enable");
+	}
+	return 0;
+}
+
+module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
+		  NULL, 0644);
+
+/* --------------------------------------------------------------------------
+                              FS Interface (/proc)
+   -------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_PROCFS
+#define ACPI_SYSTEM_FILE_DEBUG_LAYER	"debug_layer"
+#define ACPI_SYSTEM_FILE_DEBUG_LEVEL		"debug_level"
+
+static int
+acpi_system_read_debug(char *page,
+		       char **start, off_t off, int count, int *eof, void *data)
+{
+	char *p = page;
+	int size = 0;
+	unsigned int i;
+
+	if (off != 0)
+		goto end;
+
+	p += sprintf(p, "%-25s\tHex        SET\n", "Description");
+
+	switch ((unsigned long)data) {
+	case 0:
+		for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
+			p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
+				     acpi_debug_layers[i].name,
+				     acpi_debug_layers[i].value,
+				     (acpi_dbg_layer & acpi_debug_layers[i].
+				      value) ? '*' : ' ');
+		}
+		p += sprintf(p, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
+			     ACPI_ALL_DRIVERS,
+			     (acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
+			     ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer &
+						       ACPI_ALL_DRIVERS) ==
+			     0 ? ' ' : '-');
+		p += sprintf(p,
+			     "--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
+			     acpi_dbg_layer);
+		break;
+	case 1:
+		for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
+			p += sprintf(p, "%-25s\t0x%08lX [%c]\n",
+				     acpi_debug_levels[i].name,
+				     acpi_debug_levels[i].value,
+				     (acpi_dbg_level & acpi_debug_levels[i].
+				      value) ? '*' : ' ');
+		}
+		p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
+			     acpi_dbg_level);
+		break;
+	default:
+		p += sprintf(p, "Invalid debug option\n");
+		break;
+	}
+
+      end:
+	size = (p - page);
+	if (size <= off + count)
+		*eof = 1;
+	*start = page + off;
+	size -= off;
+	if (size > count)
+		size = count;
+	if (size < 0)
+		size = 0;
+
+	return size;
+}
+
+static int
+acpi_system_write_debug(struct file *file,
+			const char __user * buffer,
+			unsigned long count, void *data)
+{
+	char debug_string[12] = { '\0' };
+
+
+	if (count > sizeof(debug_string) - 1)
+		return -EINVAL;
+
+	if (copy_from_user(debug_string, buffer, count))
+		return -EFAULT;
+
+	debug_string[count] = '\0';
+
+	switch ((unsigned long)data) {
+	case 0:
+		acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
+		break;
+	case 1:
+		acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return count;
+}
+
+static int __init acpi_debug_init(void)
+{
+	struct proc_dir_entry *entry;
+	int error = 0;
+	char *name;
+
+
+	if (acpi_disabled)
+		return 0;
+
+	/* 'debug_layer' [R/W] */
+	name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
+	entry =
+	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
+				   acpi_root_dir, acpi_system_read_debug,
+				   (void *)0);
+	if (entry)
+		entry->write_proc = acpi_system_write_debug;
+	else
+		goto Error;
+
+	/* 'debug_level' [R/W] */
+	name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
+	entry =
+	    create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
+				   acpi_root_dir, acpi_system_read_debug,
+				   (void *)1);
+	if (entry)
+		entry->write_proc = acpi_system_write_debug;
+	else
+		goto Error;
+
+      Done:
+	return error;
+
+      Error:
+	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
+	remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
+	error = -ENODEV;
+	goto Done;
+}
+
+subsys_initcall(acpi_debug_init);
+#endif
-- 
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