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![Bob Moore](/assets/img/avatar_default.png)
ACPICA commit 24870bd9e73d71e2a1ff0a1e94519f8f8409e57d ACPI_NAME_SIZE changed to ACPI_NAMESEG_SIZE This clarifies that this is the length of an individual nameseg, not the length of a generic namestring/namepath. Improves understanding of the code. Link: https://github.com/acpica/acpica/commit/24870bd9 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Schmauss <erik.schmauss@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1052 lines
27 KiB
C
1052 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* sysfs.c - ACPI sysfs interface to userspace.
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*/
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/acpi.h>
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#include "internal.h"
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#define _COMPONENT ACPI_SYSTEM_COMPONENT
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ACPI_MODULE_NAME("sysfs");
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#ifdef CONFIG_ACPI_DEBUG
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/*
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* ACPI debug sysfs I/F, including:
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* /sys/modules/acpi/parameters/debug_layer
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* /sys/modules/acpi/parameters/debug_level
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* /sys/modules/acpi/parameters/trace_method_name
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* /sys/modules/acpi/parameters/trace_state
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* /sys/modules/acpi/parameters/trace_debug_layer
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* /sys/modules/acpi/parameters/trace_debug_level
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*/
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struct acpi_dlayer {
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const char *name;
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unsigned long value;
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};
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struct acpi_dlevel {
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const char *name;
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unsigned long value;
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};
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#define ACPI_DEBUG_INIT(v) { .name = #v, .value = v }
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static const struct acpi_dlayer acpi_debug_layers[] = {
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ACPI_DEBUG_INIT(ACPI_UTILITIES),
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ACPI_DEBUG_INIT(ACPI_HARDWARE),
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ACPI_DEBUG_INIT(ACPI_EVENTS),
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ACPI_DEBUG_INIT(ACPI_TABLES),
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ACPI_DEBUG_INIT(ACPI_NAMESPACE),
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ACPI_DEBUG_INIT(ACPI_PARSER),
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ACPI_DEBUG_INIT(ACPI_DISPATCHER),
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ACPI_DEBUG_INIT(ACPI_EXECUTER),
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ACPI_DEBUG_INIT(ACPI_RESOURCES),
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ACPI_DEBUG_INIT(ACPI_CA_DEBUGGER),
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ACPI_DEBUG_INIT(ACPI_OS_SERVICES),
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ACPI_DEBUG_INIT(ACPI_CA_DISASSEMBLER),
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ACPI_DEBUG_INIT(ACPI_COMPILER),
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ACPI_DEBUG_INIT(ACPI_TOOLS),
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ACPI_DEBUG_INIT(ACPI_BUS_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_AC_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_BATTERY_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_BUTTON_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_SBS_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_FAN_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_PCI_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_POWER_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_CONTAINER_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_THERMAL_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_VIDEO_COMPONENT),
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ACPI_DEBUG_INIT(ACPI_PROCESSOR_COMPONENT),
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};
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static const struct acpi_dlevel acpi_debug_levels[] = {
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ACPI_DEBUG_INIT(ACPI_LV_INIT),
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ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT),
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ACPI_DEBUG_INIT(ACPI_LV_INFO),
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ACPI_DEBUG_INIT(ACPI_LV_REPAIR),
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ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT),
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ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES),
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ACPI_DEBUG_INIT(ACPI_LV_PARSE),
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ACPI_DEBUG_INIT(ACPI_LV_LOAD),
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ACPI_DEBUG_INIT(ACPI_LV_DISPATCH),
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ACPI_DEBUG_INIT(ACPI_LV_EXEC),
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ACPI_DEBUG_INIT(ACPI_LV_NAMES),
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ACPI_DEBUG_INIT(ACPI_LV_OPREGION),
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ACPI_DEBUG_INIT(ACPI_LV_BFIELD),
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ACPI_DEBUG_INIT(ACPI_LV_TABLES),
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ACPI_DEBUG_INIT(ACPI_LV_VALUES),
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ACPI_DEBUG_INIT(ACPI_LV_OBJECTS),
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ACPI_DEBUG_INIT(ACPI_LV_RESOURCES),
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ACPI_DEBUG_INIT(ACPI_LV_USER_REQUESTS),
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ACPI_DEBUG_INIT(ACPI_LV_PACKAGE),
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ACPI_DEBUG_INIT(ACPI_LV_ALLOCATIONS),
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ACPI_DEBUG_INIT(ACPI_LV_FUNCTIONS),
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ACPI_DEBUG_INIT(ACPI_LV_OPTIMIZATIONS),
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ACPI_DEBUG_INIT(ACPI_LV_MUTEX),
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ACPI_DEBUG_INIT(ACPI_LV_THREADS),
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ACPI_DEBUG_INIT(ACPI_LV_IO),
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ACPI_DEBUG_INIT(ACPI_LV_INTERRUPTS),
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ACPI_DEBUG_INIT(ACPI_LV_AML_DISASSEMBLE),
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ACPI_DEBUG_INIT(ACPI_LV_VERBOSE_INFO),
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ACPI_DEBUG_INIT(ACPI_LV_FULL_TABLES),
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ACPI_DEBUG_INIT(ACPI_LV_EVENTS),
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};
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static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
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{
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int result = 0;
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int i;
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result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
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for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
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result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
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acpi_debug_layers[i].name,
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acpi_debug_layers[i].value,
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(acpi_dbg_layer & acpi_debug_layers[i].value)
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? '*' : ' ');
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}
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result +=
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sprintf(buffer + result, "%-25s\t0x%08X [%c]\n", "ACPI_ALL_DRIVERS",
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ACPI_ALL_DRIVERS,
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(acpi_dbg_layer & ACPI_ALL_DRIVERS) ==
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ACPI_ALL_DRIVERS ? '*' : (acpi_dbg_layer & ACPI_ALL_DRIVERS)
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== 0 ? ' ' : '-');
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result +=
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sprintf(buffer + result,
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"--\ndebug_layer = 0x%08X ( * = enabled)\n",
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acpi_dbg_layer);
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return result;
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}
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static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
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{
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int result = 0;
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int i;
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result = sprintf(buffer, "%-25s\tHex SET\n", "Description");
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for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
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result += sprintf(buffer + result, "%-25s\t0x%08lX [%c]\n",
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acpi_debug_levels[i].name,
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acpi_debug_levels[i].value,
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(acpi_dbg_level & acpi_debug_levels[i].value)
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? '*' : ' ');
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}
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result +=
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sprintf(buffer + result, "--\ndebug_level = 0x%08X (* = enabled)\n",
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acpi_dbg_level);
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return result;
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}
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static const struct kernel_param_ops param_ops_debug_layer = {
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.set = param_set_uint,
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.get = param_get_debug_layer,
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};
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static const struct kernel_param_ops param_ops_debug_level = {
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.set = param_set_uint,
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.get = param_get_debug_level,
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};
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module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644);
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module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644);
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static char trace_method_name[1024];
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static int param_set_trace_method_name(const char *val,
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const struct kernel_param *kp)
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{
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u32 saved_flags = 0;
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bool is_abs_path = true;
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if (*val != '\\')
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is_abs_path = false;
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if ((is_abs_path && strlen(val) > 1023) ||
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(!is_abs_path && strlen(val) > 1022)) {
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pr_err("%s: string parameter too long\n", kp->name);
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return -ENOSPC;
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}
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/*
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* It's not safe to update acpi_gbl_trace_method_name without
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* having the tracer stopped, so we save the original tracer
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* state and disable it.
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*/
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saved_flags = acpi_gbl_trace_flags;
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(void)acpi_debug_trace(NULL,
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acpi_gbl_trace_dbg_level,
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acpi_gbl_trace_dbg_layer,
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0);
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/* This is a hack. We can't kmalloc in early boot. */
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if (is_abs_path)
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strcpy(trace_method_name, val);
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else {
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trace_method_name[0] = '\\';
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strcpy(trace_method_name+1, val);
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}
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/* Restore the original tracer state */
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(void)acpi_debug_trace(trace_method_name,
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acpi_gbl_trace_dbg_level,
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acpi_gbl_trace_dbg_layer,
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saved_flags);
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return 0;
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}
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static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp)
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{
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return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name);
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}
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static const struct kernel_param_ops param_ops_trace_method = {
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.set = param_set_trace_method_name,
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.get = param_get_trace_method_name,
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};
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static const struct kernel_param_ops param_ops_trace_attrib = {
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.set = param_set_uint,
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.get = param_get_uint,
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};
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module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644);
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module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644);
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module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644);
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static int param_set_trace_state(const char *val,
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const struct kernel_param *kp)
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{
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acpi_status status;
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const char *method = trace_method_name;
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u32 flags = 0;
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/* So "xxx-once" comparison should go prior than "xxx" comparison */
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#define acpi_compare_param(val, key) \
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strncmp((val), (key), sizeof(key) - 1)
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if (!acpi_compare_param(val, "enable")) {
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method = NULL;
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flags = ACPI_TRACE_ENABLED;
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} else if (!acpi_compare_param(val, "disable"))
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method = NULL;
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else if (!acpi_compare_param(val, "method-once"))
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flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT;
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else if (!acpi_compare_param(val, "method"))
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flags = ACPI_TRACE_ENABLED;
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else if (!acpi_compare_param(val, "opcode-once"))
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flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE;
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else if (!acpi_compare_param(val, "opcode"))
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flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE;
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else
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return -EINVAL;
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status = acpi_debug_trace(method,
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acpi_gbl_trace_dbg_level,
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acpi_gbl_trace_dbg_layer,
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flags);
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if (ACPI_FAILURE(status))
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return -EBUSY;
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return 0;
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}
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static int param_get_trace_state(char *buffer, const struct kernel_param *kp)
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{
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if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED))
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return sprintf(buffer, "disable");
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else {
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if (acpi_gbl_trace_method_name) {
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if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT)
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return sprintf(buffer, "method-once");
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else
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return sprintf(buffer, "method");
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} else
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return sprintf(buffer, "enable");
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}
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return 0;
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}
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module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
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NULL, 0644);
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#endif /* CONFIG_ACPI_DEBUG */
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/* /sys/modules/acpi/parameters/aml_debug_output */
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module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object,
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byte, 0644);
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MODULE_PARM_DESC(aml_debug_output,
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"To enable/disable the ACPI Debug Object output.");
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/* /sys/module/acpi/parameters/acpica_version */
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static int param_get_acpica_version(char *buffer,
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const struct kernel_param *kp)
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{
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int result;
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result = sprintf(buffer, "%x", ACPI_CA_VERSION);
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return result;
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}
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module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
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/*
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* ACPI table sysfs I/F:
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* /sys/firmware/acpi/tables/
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* /sys/firmware/acpi/tables/data/
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* /sys/firmware/acpi/tables/dynamic/
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*/
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static LIST_HEAD(acpi_table_attr_list);
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static struct kobject *tables_kobj;
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static struct kobject *tables_data_kobj;
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static struct kobject *dynamic_tables_kobj;
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static struct kobject *hotplug_kobj;
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#define ACPI_MAX_TABLE_INSTANCES 999
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#define ACPI_INST_SIZE 4 /* including trailing 0 */
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struct acpi_table_attr {
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struct bin_attribute attr;
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char name[ACPI_NAMESEG_SIZE];
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int instance;
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char filename[ACPI_NAMESEG_SIZE+ACPI_INST_SIZE];
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struct list_head node;
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};
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struct acpi_data_attr {
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struct bin_attribute attr;
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u64 addr;
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};
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static ssize_t acpi_table_show(struct file *filp, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf,
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loff_t offset, size_t count)
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{
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struct acpi_table_attr *table_attr =
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container_of(bin_attr, struct acpi_table_attr, attr);
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struct acpi_table_header *table_header = NULL;
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acpi_status status;
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ssize_t rc;
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status = acpi_get_table(table_attr->name, table_attr->instance,
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&table_header);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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rc = memory_read_from_buffer(buf, count, &offset, table_header,
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table_header->length);
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acpi_put_table(table_header);
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return rc;
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}
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static int acpi_table_attr_init(struct kobject *tables_obj,
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struct acpi_table_attr *table_attr,
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struct acpi_table_header *table_header)
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{
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struct acpi_table_header *header = NULL;
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struct acpi_table_attr *attr = NULL;
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char instance_str[ACPI_INST_SIZE];
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sysfs_attr_init(&table_attr->attr.attr);
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ACPI_COPY_NAMESEG(table_attr->name, table_header->signature);
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list_for_each_entry(attr, &acpi_table_attr_list, node) {
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if (ACPI_COMPARE_NAMESEG(table_attr->name, attr->name))
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if (table_attr->instance < attr->instance)
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table_attr->instance = attr->instance;
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}
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table_attr->instance++;
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if (table_attr->instance > ACPI_MAX_TABLE_INSTANCES) {
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pr_warn("%4.4s: too many table instances\n",
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table_attr->name);
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return -ERANGE;
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}
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ACPI_COPY_NAMESEG(table_attr->filename, table_header->signature);
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table_attr->filename[ACPI_NAMESEG_SIZE] = '\0';
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if (table_attr->instance > 1 || (table_attr->instance == 1 &&
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!acpi_get_table
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(table_header->signature, 2, &header))) {
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snprintf(instance_str, sizeof(instance_str), "%u",
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table_attr->instance);
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strcat(table_attr->filename, instance_str);
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}
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table_attr->attr.size = table_header->length;
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table_attr->attr.read = acpi_table_show;
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table_attr->attr.attr.name = table_attr->filename;
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table_attr->attr.attr.mode = 0400;
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return sysfs_create_bin_file(tables_obj, &table_attr->attr);
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}
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acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context)
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{
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struct acpi_table_attr *table_attr;
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switch (event) {
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case ACPI_TABLE_EVENT_INSTALL:
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table_attr =
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kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
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if (!table_attr)
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return AE_NO_MEMORY;
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if (acpi_table_attr_init(dynamic_tables_kobj,
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table_attr, table)) {
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kfree(table_attr);
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return AE_ERROR;
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}
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list_add_tail(&table_attr->node, &acpi_table_attr_list);
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break;
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case ACPI_TABLE_EVENT_LOAD:
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case ACPI_TABLE_EVENT_UNLOAD:
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case ACPI_TABLE_EVENT_UNINSTALL:
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/*
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* we do not need to do anything right now
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* because the table is not deleted from the
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* global table list when unloading it.
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*/
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break;
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default:
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return AE_BAD_PARAMETER;
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}
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return AE_OK;
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}
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static ssize_t acpi_data_show(struct file *filp, struct kobject *kobj,
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struct bin_attribute *bin_attr, char *buf,
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loff_t offset, size_t count)
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{
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struct acpi_data_attr *data_attr;
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void __iomem *base;
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ssize_t rc;
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data_attr = container_of(bin_attr, struct acpi_data_attr, attr);
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base = acpi_os_map_memory(data_attr->addr, data_attr->attr.size);
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if (!base)
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return -ENOMEM;
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rc = memory_read_from_buffer(buf, count, &offset, base,
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data_attr->attr.size);
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acpi_os_unmap_memory(base, data_attr->attr.size);
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return rc;
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}
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static int acpi_bert_data_init(void *th, struct acpi_data_attr *data_attr)
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{
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struct acpi_table_bert *bert = th;
|
|
|
|
if (bert->header.length < sizeof(struct acpi_table_bert) ||
|
|
bert->region_length < sizeof(struct acpi_hest_generic_status)) {
|
|
kfree(data_attr);
|
|
return -EINVAL;
|
|
}
|
|
data_attr->addr = bert->address;
|
|
data_attr->attr.size = bert->region_length;
|
|
data_attr->attr.attr.name = "BERT";
|
|
|
|
return sysfs_create_bin_file(tables_data_kobj, &data_attr->attr);
|
|
}
|
|
|
|
static struct acpi_data_obj {
|
|
char *name;
|
|
int (*fn)(void *, struct acpi_data_attr *);
|
|
} acpi_data_objs[] = {
|
|
{ ACPI_SIG_BERT, acpi_bert_data_init },
|
|
};
|
|
|
|
#define NUM_ACPI_DATA_OBJS ARRAY_SIZE(acpi_data_objs)
|
|
|
|
static int acpi_table_data_init(struct acpi_table_header *th)
|
|
{
|
|
struct acpi_data_attr *data_attr;
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_ACPI_DATA_OBJS; i++) {
|
|
if (ACPI_COMPARE_NAMESEG(th->signature, acpi_data_objs[i].name)) {
|
|
data_attr = kzalloc(sizeof(*data_attr), GFP_KERNEL);
|
|
if (!data_attr)
|
|
return -ENOMEM;
|
|
sysfs_attr_init(&data_attr->attr.attr);
|
|
data_attr->attr.read = acpi_data_show;
|
|
data_attr->attr.attr.mode = 0400;
|
|
return acpi_data_objs[i].fn(th, data_attr);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_tables_sysfs_init(void)
|
|
{
|
|
struct acpi_table_attr *table_attr;
|
|
struct acpi_table_header *table_header = NULL;
|
|
int table_index;
|
|
acpi_status status;
|
|
int ret;
|
|
|
|
tables_kobj = kobject_create_and_add("tables", acpi_kobj);
|
|
if (!tables_kobj)
|
|
goto err;
|
|
|
|
tables_data_kobj = kobject_create_and_add("data", tables_kobj);
|
|
if (!tables_data_kobj)
|
|
goto err_tables_data;
|
|
|
|
dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
|
|
if (!dynamic_tables_kobj)
|
|
goto err_dynamic_tables;
|
|
|
|
for (table_index = 0;; table_index++) {
|
|
status = acpi_get_table_by_index(table_index, &table_header);
|
|
|
|
if (status == AE_BAD_PARAMETER)
|
|
break;
|
|
|
|
if (ACPI_FAILURE(status))
|
|
continue;
|
|
|
|
table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL);
|
|
if (!table_attr)
|
|
return -ENOMEM;
|
|
|
|
ret = acpi_table_attr_init(tables_kobj,
|
|
table_attr, table_header);
|
|
if (ret) {
|
|
kfree(table_attr);
|
|
return ret;
|
|
}
|
|
list_add_tail(&table_attr->node, &acpi_table_attr_list);
|
|
acpi_table_data_init(table_header);
|
|
}
|
|
|
|
kobject_uevent(tables_kobj, KOBJ_ADD);
|
|
kobject_uevent(tables_data_kobj, KOBJ_ADD);
|
|
kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
|
|
|
|
return 0;
|
|
err_dynamic_tables:
|
|
kobject_put(tables_data_kobj);
|
|
err_tables_data:
|
|
kobject_put(tables_kobj);
|
|
err:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Detailed ACPI IRQ counters:
|
|
* /sys/firmware/acpi/interrupts/
|
|
*/
|
|
|
|
u32 acpi_irq_handled;
|
|
u32 acpi_irq_not_handled;
|
|
|
|
#define COUNT_GPE 0
|
|
#define COUNT_SCI 1 /* acpi_irq_handled */
|
|
#define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */
|
|
#define COUNT_ERROR 3 /* other */
|
|
#define NUM_COUNTERS_EXTRA 4
|
|
|
|
struct event_counter {
|
|
u32 count;
|
|
u32 flags;
|
|
};
|
|
|
|
static struct event_counter *all_counters;
|
|
static u32 num_gpes;
|
|
static u32 num_counters;
|
|
static struct attribute **all_attrs;
|
|
static u32 acpi_gpe_count;
|
|
|
|
static struct attribute_group interrupt_stats_attr_group = {
|
|
.name = "interrupts",
|
|
};
|
|
|
|
static struct kobj_attribute *counter_attrs;
|
|
|
|
static void delete_gpe_attr_array(void)
|
|
{
|
|
struct event_counter *tmp = all_counters;
|
|
|
|
all_counters = NULL;
|
|
kfree(tmp);
|
|
|
|
if (counter_attrs) {
|
|
int i;
|
|
|
|
for (i = 0; i < num_gpes; i++)
|
|
kfree(counter_attrs[i].attr.name);
|
|
|
|
kfree(counter_attrs);
|
|
}
|
|
kfree(all_attrs);
|
|
|
|
return;
|
|
}
|
|
|
|
static void gpe_count(u32 gpe_number)
|
|
{
|
|
acpi_gpe_count++;
|
|
|
|
if (!all_counters)
|
|
return;
|
|
|
|
if (gpe_number < num_gpes)
|
|
all_counters[gpe_number].count++;
|
|
else
|
|
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
|
|
COUNT_ERROR].count++;
|
|
|
|
return;
|
|
}
|
|
|
|
static void fixed_event_count(u32 event_number)
|
|
{
|
|
if (!all_counters)
|
|
return;
|
|
|
|
if (event_number < ACPI_NUM_FIXED_EVENTS)
|
|
all_counters[num_gpes + event_number].count++;
|
|
else
|
|
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS +
|
|
COUNT_ERROR].count++;
|
|
|
|
return;
|
|
}
|
|
|
|
static void acpi_global_event_handler(u32 event_type, acpi_handle device,
|
|
u32 event_number, void *context)
|
|
{
|
|
if (event_type == ACPI_EVENT_TYPE_GPE) {
|
|
gpe_count(event_number);
|
|
pr_debug("GPE event 0x%02x\n", event_number);
|
|
} else if (event_type == ACPI_EVENT_TYPE_FIXED) {
|
|
fixed_event_count(event_number);
|
|
pr_debug("Fixed event 0x%02x\n", event_number);
|
|
} else {
|
|
pr_debug("Other event 0x%02x\n", event_number);
|
|
}
|
|
}
|
|
|
|
static int get_status(u32 index, acpi_event_status *ret,
|
|
acpi_handle *handle)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
|
|
return -EINVAL;
|
|
|
|
if (index < num_gpes) {
|
|
status = acpi_get_gpe_device(index, handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
|
|
"Invalid GPE 0x%x", index));
|
|
return -ENXIO;
|
|
}
|
|
status = acpi_get_gpe_status(*handle, index, ret);
|
|
} else {
|
|
status = acpi_get_event_status(index - num_gpes, ret);
|
|
}
|
|
if (ACPI_FAILURE(status))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t counter_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
int index = attr - counter_attrs;
|
|
int size;
|
|
acpi_handle handle;
|
|
acpi_event_status status;
|
|
int result = 0;
|
|
|
|
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
|
|
acpi_irq_handled;
|
|
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count =
|
|
acpi_irq_not_handled;
|
|
all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
|
|
acpi_gpe_count;
|
|
size = sprintf(buf, "%8u", all_counters[index].count);
|
|
|
|
/* "gpe_all" or "sci" */
|
|
if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
|
|
goto end;
|
|
|
|
result = get_status(index, &status, &handle);
|
|
if (result)
|
|
goto end;
|
|
|
|
if (status & ACPI_EVENT_FLAG_ENABLE_SET)
|
|
size += sprintf(buf + size, " EN");
|
|
else
|
|
size += sprintf(buf + size, " ");
|
|
if (status & ACPI_EVENT_FLAG_STATUS_SET)
|
|
size += sprintf(buf + size, " STS");
|
|
else
|
|
size += sprintf(buf + size, " ");
|
|
|
|
if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER))
|
|
size += sprintf(buf + size, " invalid ");
|
|
else if (status & ACPI_EVENT_FLAG_ENABLED)
|
|
size += sprintf(buf + size, " enabled ");
|
|
else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
|
|
size += sprintf(buf + size, " wake_enabled");
|
|
else
|
|
size += sprintf(buf + size, " disabled ");
|
|
if (status & ACPI_EVENT_FLAG_MASKED)
|
|
size += sprintf(buf + size, " masked ");
|
|
else
|
|
size += sprintf(buf + size, " unmasked");
|
|
|
|
end:
|
|
size += sprintf(buf + size, "\n");
|
|
return result ? result : size;
|
|
}
|
|
|
|
/*
|
|
* counter_set() sets the specified counter.
|
|
* setting the total "sci" file to any value clears all counters.
|
|
* enable/disable/clear a gpe/fixed event in user space.
|
|
*/
|
|
static ssize_t counter_set(struct kobject *kobj,
|
|
struct kobj_attribute *attr, const char *buf,
|
|
size_t size)
|
|
{
|
|
int index = attr - counter_attrs;
|
|
acpi_event_status status;
|
|
acpi_handle handle;
|
|
int result = 0;
|
|
unsigned long tmp;
|
|
|
|
if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
|
|
int i;
|
|
for (i = 0; i < num_counters; ++i)
|
|
all_counters[i].count = 0;
|
|
acpi_gpe_count = 0;
|
|
acpi_irq_handled = 0;
|
|
acpi_irq_not_handled = 0;
|
|
goto end;
|
|
}
|
|
|
|
/* show the event status for both GPEs and Fixed Events */
|
|
result = get_status(index, &status, &handle);
|
|
if (result)
|
|
goto end;
|
|
|
|
if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) {
|
|
printk(KERN_WARNING PREFIX
|
|
"Can not change Invalid GPE/Fixed Event status\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (index < num_gpes) {
|
|
if (!strcmp(buf, "disable\n") &&
|
|
(status & ACPI_EVENT_FLAG_ENABLED))
|
|
result = acpi_disable_gpe(handle, index);
|
|
else if (!strcmp(buf, "enable\n") &&
|
|
!(status & ACPI_EVENT_FLAG_ENABLED))
|
|
result = acpi_enable_gpe(handle, index);
|
|
else if (!strcmp(buf, "clear\n") &&
|
|
(status & ACPI_EVENT_FLAG_STATUS_SET))
|
|
result = acpi_clear_gpe(handle, index);
|
|
else if (!strcmp(buf, "mask\n"))
|
|
result = acpi_mask_gpe(handle, index, TRUE);
|
|
else if (!strcmp(buf, "unmask\n"))
|
|
result = acpi_mask_gpe(handle, index, FALSE);
|
|
else if (!kstrtoul(buf, 0, &tmp))
|
|
all_counters[index].count = tmp;
|
|
else
|
|
result = -EINVAL;
|
|
} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
|
|
int event = index - num_gpes;
|
|
if (!strcmp(buf, "disable\n") &&
|
|
(status & ACPI_EVENT_FLAG_ENABLE_SET))
|
|
result = acpi_disable_event(event, ACPI_NOT_ISR);
|
|
else if (!strcmp(buf, "enable\n") &&
|
|
!(status & ACPI_EVENT_FLAG_ENABLE_SET))
|
|
result = acpi_enable_event(event, ACPI_NOT_ISR);
|
|
else if (!strcmp(buf, "clear\n") &&
|
|
(status & ACPI_EVENT_FLAG_STATUS_SET))
|
|
result = acpi_clear_event(event);
|
|
else if (!kstrtoul(buf, 0, &tmp))
|
|
all_counters[index].count = tmp;
|
|
else
|
|
result = -EINVAL;
|
|
} else
|
|
all_counters[index].count = strtoul(buf, NULL, 0);
|
|
|
|
if (ACPI_FAILURE(result))
|
|
result = -EINVAL;
|
|
end:
|
|
return result ? result : size;
|
|
}
|
|
|
|
/*
|
|
* A Quirk Mechanism for GPE Flooding Prevention:
|
|
*
|
|
* Quirks may be needed to prevent GPE flooding on a specific GPE. The
|
|
* flooding typically cannot be detected and automatically prevented by
|
|
* ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in
|
|
* the AML tables. This normally indicates a feature gap in Linux, thus
|
|
* instead of providing endless quirk tables, we provide a boot parameter
|
|
* for those who want this quirk. For example, if the users want to prevent
|
|
* the GPE flooding for GPE 00, they need to specify the following boot
|
|
* parameter:
|
|
* acpi_mask_gpe=0x00
|
|
* The masking status can be modified by the following runtime controlling
|
|
* interface:
|
|
* echo unmask > /sys/firmware/acpi/interrupts/gpe00
|
|
*/
|
|
#define ACPI_MASKABLE_GPE_MAX 0xFF
|
|
static DECLARE_BITMAP(acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) __initdata;
|
|
|
|
static int __init acpi_gpe_set_masked_gpes(char *val)
|
|
{
|
|
u8 gpe;
|
|
|
|
if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX)
|
|
return -EINVAL;
|
|
set_bit(gpe, acpi_masked_gpes_map);
|
|
|
|
return 1;
|
|
}
|
|
__setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes);
|
|
|
|
void __init acpi_gpe_apply_masked_gpes(void)
|
|
{
|
|
acpi_handle handle;
|
|
acpi_status status;
|
|
u8 gpe;
|
|
|
|
for_each_set_bit(gpe, acpi_masked_gpes_map, ACPI_MASKABLE_GPE_MAX) {
|
|
status = acpi_get_gpe_device(gpe, &handle);
|
|
if (ACPI_SUCCESS(status)) {
|
|
pr_info("Masking GPE 0x%x.\n", gpe);
|
|
(void)acpi_mask_gpe(handle, gpe, TRUE);
|
|
}
|
|
}
|
|
}
|
|
|
|
void acpi_irq_stats_init(void)
|
|
{
|
|
acpi_status status;
|
|
int i;
|
|
|
|
if (all_counters)
|
|
return;
|
|
|
|
num_gpes = acpi_current_gpe_count;
|
|
num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
|
|
|
|
all_attrs = kcalloc(num_counters + 1, sizeof(struct attribute *),
|
|
GFP_KERNEL);
|
|
if (all_attrs == NULL)
|
|
return;
|
|
|
|
all_counters = kcalloc(num_counters, sizeof(struct event_counter),
|
|
GFP_KERNEL);
|
|
if (all_counters == NULL)
|
|
goto fail;
|
|
|
|
status = acpi_install_global_event_handler(acpi_global_event_handler, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
goto fail;
|
|
|
|
counter_attrs = kcalloc(num_counters, sizeof(struct kobj_attribute),
|
|
GFP_KERNEL);
|
|
if (counter_attrs == NULL)
|
|
goto fail;
|
|
|
|
for (i = 0; i < num_counters; ++i) {
|
|
char buffer[12];
|
|
char *name;
|
|
|
|
if (i < num_gpes)
|
|
sprintf(buffer, "gpe%02X", i);
|
|
else if (i == num_gpes + ACPI_EVENT_PMTIMER)
|
|
sprintf(buffer, "ff_pmtimer");
|
|
else if (i == num_gpes + ACPI_EVENT_GLOBAL)
|
|
sprintf(buffer, "ff_gbl_lock");
|
|
else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
|
|
sprintf(buffer, "ff_pwr_btn");
|
|
else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
|
|
sprintf(buffer, "ff_slp_btn");
|
|
else if (i == num_gpes + ACPI_EVENT_RTC)
|
|
sprintf(buffer, "ff_rt_clk");
|
|
else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
|
|
sprintf(buffer, "gpe_all");
|
|
else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
|
|
sprintf(buffer, "sci");
|
|
else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT)
|
|
sprintf(buffer, "sci_not");
|
|
else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
|
|
sprintf(buffer, "error");
|
|
else
|
|
sprintf(buffer, "bug%02X", i);
|
|
|
|
name = kstrdup(buffer, GFP_KERNEL);
|
|
if (name == NULL)
|
|
goto fail;
|
|
|
|
sysfs_attr_init(&counter_attrs[i].attr);
|
|
counter_attrs[i].attr.name = name;
|
|
counter_attrs[i].attr.mode = 0644;
|
|
counter_attrs[i].show = counter_show;
|
|
counter_attrs[i].store = counter_set;
|
|
|
|
all_attrs[i] = &counter_attrs[i].attr;
|
|
}
|
|
|
|
interrupt_stats_attr_group.attrs = all_attrs;
|
|
if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
|
|
return;
|
|
|
|
fail:
|
|
delete_gpe_attr_array();
|
|
return;
|
|
}
|
|
|
|
static void __exit interrupt_stats_exit(void)
|
|
{
|
|
sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
|
|
|
|
delete_gpe_attr_array();
|
|
|
|
return;
|
|
}
|
|
|
|
static ssize_t
|
|
acpi_show_profile(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile);
|
|
}
|
|
|
|
static const struct device_attribute pm_profile_attr =
|
|
__ATTR(pm_profile, S_IRUGO, acpi_show_profile, NULL);
|
|
|
|
static ssize_t hotplug_enabled_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
|
|
|
|
return sprintf(buf, "%d\n", hotplug->enabled);
|
|
}
|
|
|
|
static ssize_t hotplug_enabled_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
struct acpi_hotplug_profile *hotplug = to_acpi_hotplug_profile(kobj);
|
|
unsigned int val;
|
|
|
|
if (kstrtouint(buf, 10, &val) || val > 1)
|
|
return -EINVAL;
|
|
|
|
acpi_scan_hotplug_enabled(hotplug, val);
|
|
return size;
|
|
}
|
|
|
|
static struct kobj_attribute hotplug_enabled_attr =
|
|
__ATTR(enabled, S_IRUGO | S_IWUSR, hotplug_enabled_show,
|
|
hotplug_enabled_store);
|
|
|
|
static struct attribute *hotplug_profile_attrs[] = {
|
|
&hotplug_enabled_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct kobj_type acpi_hotplug_profile_ktype = {
|
|
.sysfs_ops = &kobj_sysfs_ops,
|
|
.default_attrs = hotplug_profile_attrs,
|
|
};
|
|
|
|
void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug,
|
|
const char *name)
|
|
{
|
|
int error;
|
|
|
|
if (!hotplug_kobj)
|
|
goto err_out;
|
|
|
|
error = kobject_init_and_add(&hotplug->kobj,
|
|
&acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name);
|
|
if (error)
|
|
goto err_out;
|
|
|
|
kobject_uevent(&hotplug->kobj, KOBJ_ADD);
|
|
return;
|
|
|
|
err_out:
|
|
pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name);
|
|
}
|
|
|
|
static ssize_t force_remove_show(struct kobject *kobj,
|
|
struct kobj_attribute *attr, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", 0);
|
|
}
|
|
|
|
static ssize_t force_remove_store(struct kobject *kobj,
|
|
struct kobj_attribute *attr,
|
|
const char *buf, size_t size)
|
|
{
|
|
bool val;
|
|
int ret;
|
|
|
|
ret = strtobool(buf, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (val) {
|
|
pr_err("Enabling force_remove is not supported anymore. Please report to linux-acpi@vger.kernel.org if you depend on this functionality\n");
|
|
return -EINVAL;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
static const struct kobj_attribute force_remove_attr =
|
|
__ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show,
|
|
force_remove_store);
|
|
|
|
int __init acpi_sysfs_init(void)
|
|
{
|
|
int result;
|
|
|
|
result = acpi_tables_sysfs_init();
|
|
if (result)
|
|
return result;
|
|
|
|
hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj);
|
|
if (!hotplug_kobj)
|
|
return -ENOMEM;
|
|
|
|
result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr);
|
|
if (result)
|
|
return result;
|
|
|
|
result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr);
|
|
return result;
|
|
}
|