407 lines
11 KiB
C
407 lines
11 KiB
C
/*
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* debug.c - ACPI debug interface to userspace.
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*/
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/moduleparam.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <asm/uaccess.h>
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#include <acpi/acpi_drivers.h>
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#define _COMPONENT ACPI_SYSTEM_COMPONENT
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ACPI_MODULE_NAME("debug");
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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_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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/* --------------------------------------------------------------------------
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FS Interface (/sys)
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-------------------------------------------------------------------------- */
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static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
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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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result += 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 &
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ACPI_ALL_DRIVERS) == 0 ? ' ' : '-');
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result += sprintf(buffer+result, "--\ndebug_layer = 0x%08X ( * = enabled)\n", 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, struct kernel_param *kp) {
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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].
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value) ? '*' : ' ');
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}
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result += 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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module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
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module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
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static char trace_method_name[6];
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module_param_string(trace_method_name, trace_method_name, 6, 0644);
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static unsigned int trace_debug_layer;
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module_param(trace_debug_layer, uint, 0644);
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static unsigned int trace_debug_level;
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module_param(trace_debug_level, uint, 0644);
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static int param_set_trace_state(const char *val, struct kernel_param *kp)
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{
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int result = 0;
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if (!strncmp(val, "enable", strlen("enable") - 1)) {
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result = acpi_debug_trace(trace_method_name, trace_debug_level,
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trace_debug_layer, 0);
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if (result)
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result = -EBUSY;
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goto exit;
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}
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if (!strncmp(val, "disable", strlen("disable") - 1)) {
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int name = 0;
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result = acpi_debug_trace((char *)&name, trace_debug_level,
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trace_debug_layer, 0);
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if (result)
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result = -EBUSY;
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goto exit;
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}
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if (!strncmp(val, "1", 1)) {
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result = acpi_debug_trace(trace_method_name, trace_debug_level,
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trace_debug_layer, 1);
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if (result)
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result = -EBUSY;
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goto exit;
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}
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result = -EINVAL;
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exit:
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return result;
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}
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static int param_get_trace_state(char *buffer, struct kernel_param *kp)
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{
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if (!acpi_gbl_trace_method_name)
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return sprintf(buffer, "disable");
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else {
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if (acpi_gbl_trace_flags & 1)
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return sprintf(buffer, "1");
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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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/* --------------------------------------------------------------------------
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DebugFS Interface
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-------------------------------------------------------------------------- */
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static ssize_t cm_write(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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static char *buf;
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static int uncopied_bytes;
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struct acpi_table_header table;
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acpi_status status;
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if (!(*ppos)) {
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/* parse the table header to get the table length */
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if (count <= sizeof(struct acpi_table_header))
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return -EINVAL;
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if (copy_from_user(&table, user_buf,
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sizeof(struct acpi_table_header)))
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return -EFAULT;
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uncopied_bytes = table.length;
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buf = kzalloc(uncopied_bytes, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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}
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if (uncopied_bytes < count) {
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kfree(buf);
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return -EINVAL;
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}
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if (copy_from_user(buf + (*ppos), user_buf, count)) {
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kfree(buf);
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return -EFAULT;
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}
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uncopied_bytes -= count;
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*ppos += count;
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if (!uncopied_bytes) {
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status = acpi_install_method(buf);
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kfree(buf);
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if (ACPI_FAILURE(status))
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return -EINVAL;
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add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
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}
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return count;
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}
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static const struct file_operations cm_fops = {
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.write = cm_write,
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};
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static int acpi_debugfs_init(void)
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{
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struct dentry *acpi_dir, *cm_dentry;
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acpi_dir = debugfs_create_dir("acpi", NULL);
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if (!acpi_dir)
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goto err;
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cm_dentry = debugfs_create_file("custom_method", S_IWUGO,
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acpi_dir, NULL, &cm_fops);
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if (!cm_dentry)
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goto err;
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return 0;
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err:
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if (acpi_dir)
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debugfs_remove(acpi_dir);
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return -EINVAL;
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}
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/* --------------------------------------------------------------------------
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FS Interface (/proc)
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-------------------------------------------------------------------------- */
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#ifdef CONFIG_ACPI_PROCFS
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#define ACPI_SYSTEM_FILE_DEBUG_LAYER "debug_layer"
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#define ACPI_SYSTEM_FILE_DEBUG_LEVEL "debug_level"
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static int acpi_system_debug_proc_show(struct seq_file *m, void *v)
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{
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unsigned int i;
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seq_printf(m, "%-25s\tHex SET\n", "Description");
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switch ((unsigned long)m->private) {
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case 0:
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for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
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seq_printf(m, "%-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].
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value) ? '*' : ' ');
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}
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seq_printf(m, "%-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 &
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ACPI_ALL_DRIVERS) ==
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0 ? ' ' : '-');
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seq_printf(m,
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"--\ndebug_layer = 0x%08X (* = enabled, - = partial)\n",
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acpi_dbg_layer);
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break;
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case 1:
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for (i = 0; i < ARRAY_SIZE(acpi_debug_levels); i++) {
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seq_printf(m, "%-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].
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value) ? '*' : ' ');
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}
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seq_printf(m, "--\ndebug_level = 0x%08X (* = enabled)\n",
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acpi_dbg_level);
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break;
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}
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return 0;
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}
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static int acpi_system_debug_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_system_debug_proc_show, PDE(inode)->data);
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}
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static ssize_t acpi_system_debug_proc_write(struct file *file,
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const char __user * buffer,
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size_t count, loff_t *pos)
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{
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char debug_string[12] = { '\0' };
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if (count > sizeof(debug_string) - 1)
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return -EINVAL;
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if (copy_from_user(debug_string, buffer, count))
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return -EFAULT;
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debug_string[count] = '\0';
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switch ((unsigned long)PDE(file->f_path.dentry->d_inode)->data) {
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case 0:
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acpi_dbg_layer = simple_strtoul(debug_string, NULL, 0);
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break;
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case 1:
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acpi_dbg_level = simple_strtoul(debug_string, NULL, 0);
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break;
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default:
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return -EINVAL;
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}
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return count;
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}
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static const struct file_operations acpi_system_debug_proc_fops = {
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.owner = THIS_MODULE,
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.open = acpi_system_debug_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = acpi_system_debug_proc_write,
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};
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#endif
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int __init acpi_procfs_init(void)
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{
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#ifdef CONFIG_ACPI_PROCFS
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struct proc_dir_entry *entry;
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int error = 0;
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char *name;
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/* 'debug_layer' [R/W] */
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name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
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entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir, &acpi_system_debug_proc_fops,
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(void *)0);
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if (!entry)
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goto Error;
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/* 'debug_level' [R/W] */
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name = ACPI_SYSTEM_FILE_DEBUG_LEVEL;
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entry = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir, &acpi_system_debug_proc_fops,
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(void *)1);
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if (!entry)
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goto Error;
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Done:
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return error;
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Error:
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remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LEVEL, acpi_root_dir);
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remove_proc_entry(ACPI_SYSTEM_FILE_DEBUG_LAYER, acpi_root_dir);
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error = -ENODEV;
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goto Done;
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#else
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return 0;
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#endif
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}
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int __init acpi_debug_init(void)
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{
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acpi_debugfs_init();
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acpi_procfs_init();
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return 0;
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}
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