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1047 lines
27 KiB
1047 lines
27 KiB
// 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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|
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#define pr_fmt(fmt) "ACPI: " fmt |
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|
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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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|
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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_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_CONTAINER_COMPONENT), |
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ACPI_DEBUG_INIT(ACPI_SYSTEM_COMPONENT), |
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ACPI_DEBUG_INIT(ACPI_MEMORY_DEVICE_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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|
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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\n", 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\n"); |
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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\n"); |
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else |
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return sprintf(buffer, "method\n"); |
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} else |
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return sprintf(buffer, "enable\n"); |
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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\n", 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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|
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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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|
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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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|
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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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|
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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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|
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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; |
|
|
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if (bert->header.length < sizeof(struct acpi_table_bert) || |
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bert->region_length < sizeof(struct acpi_hest_generic_status)) { |
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kfree(data_attr); |
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return -EINVAL; |
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} |
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data_attr->addr = bert->address; |
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data_attr->attr.size = bert->region_length; |
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data_attr->attr.attr.name = "BERT"; |
|
|
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return sysfs_create_bin_file(tables_data_kobj, &data_attr->attr); |
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} |
|
|
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static struct acpi_data_obj { |
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char *name; |
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int (*fn)(void *, struct acpi_data_attr *); |
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} acpi_data_objs[] = { |
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{ ACPI_SIG_BERT, acpi_bert_data_init }, |
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}; |
|
|
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#define NUM_ACPI_DATA_OBJS ARRAY_SIZE(acpi_data_objs) |
|
|
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static int acpi_table_data_init(struct acpi_table_header *th) |
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{ |
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struct acpi_data_attr *data_attr; |
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int i; |
|
|
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for (i = 0; i < NUM_ACPI_DATA_OBJS; i++) { |
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if (ACPI_COMPARE_NAMESEG(th->signature, acpi_data_objs[i].name)) { |
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data_attr = kzalloc(sizeof(*data_attr), GFP_KERNEL); |
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if (!data_attr) |
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return -ENOMEM; |
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sysfs_attr_init(&data_attr->attr.attr); |
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data_attr->attr.read = acpi_data_show; |
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data_attr->attr.attr.mode = 0400; |
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return acpi_data_objs[i].fn(th, data_attr); |
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} |
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} |
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return 0; |
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} |
|
|
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static int acpi_tables_sysfs_init(void) |
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{ |
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struct acpi_table_attr *table_attr; |
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struct acpi_table_header *table_header = NULL; |
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int table_index; |
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acpi_status status; |
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int ret; |
|
|
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tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
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if (!tables_kobj) |
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goto err; |
|
|
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tables_data_kobj = kobject_create_and_add("data", tables_kobj); |
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if (!tables_data_kobj) |
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goto err_tables_data; |
|
|
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dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); |
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if (!dynamic_tables_kobj) |
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goto err_dynamic_tables; |
|
|
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for (table_index = 0;; table_index++) { |
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status = acpi_get_table_by_index(table_index, &table_header); |
|
|
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if (status == AE_BAD_PARAMETER) |
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break; |
|
|
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if (ACPI_FAILURE(status)) |
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continue; |
|
|
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table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); |
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if (!table_attr) |
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return -ENOMEM; |
|
|
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ret = acpi_table_attr_init(tables_kobj, |
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table_attr, table_header); |
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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 0x100 |
|
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)) |
|
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; |
|
u16 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 kobject *kobj, struct kobj_attribute *attr, |
|
char *buf) |
|
{ |
|
return sprintf(buf, "%d\n", acpi_gbl_FADT.preferred_profile); |
|
} |
|
|
|
static const struct kobj_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) { |
|
kobject_put(&hotplug->kobj); |
|
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 [email protected] 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; |
|
}
|
|
|