333 lines
8.6 KiB
C
333 lines
8.6 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/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 <asm/uaccess.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acglobal.h>
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#define _COMPONENT ACPI_SYSTEM_COMPONENT
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ACPI_MODULE_NAME("debug");
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#ifdef MODULE_PARAM_PREFIX
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#undef MODULE_PARAM_PREFIX
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#endif
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#define MODULE_PARAM_PREFIX "acpi."
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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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};
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static const struct acpi_dlevel acpi_debug_levels[] = {
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ACPI_DEBUG_INIT(ACPI_LV_ERROR),
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ACPI_DEBUG_INIT(ACPI_LV_WARN),
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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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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
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acpi_system_read_debug(char *page,
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char **start, off_t off, int count, int *eof, void *data)
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{
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char *p = page;
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int size = 0;
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unsigned int i;
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if (off != 0)
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goto end;
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p += sprintf(p, "%-25s\tHex SET\n", "Description");
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switch ((unsigned long)data) {
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case 0:
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for (i = 0; i < ARRAY_SIZE(acpi_debug_layers); i++) {
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p += sprintf(p, "%-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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p += sprintf(p, "%-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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p += sprintf(p,
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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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p += sprintf(p, "%-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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p += sprintf(p, "--\ndebug_level = 0x%08X (* = enabled)\n",
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acpi_dbg_level);
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break;
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default:
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p += sprintf(p, "Invalid debug option\n");
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break;
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}
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end:
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size = (p - page);
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if (size <= off + count)
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*eof = 1;
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*start = page + off;
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size -= off;
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if (size > count)
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size = count;
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if (size < 0)
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size = 0;
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return size;
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}
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static int
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acpi_system_write_debug(struct file *file,
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const char __user * buffer,
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unsigned long count, void *data)
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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)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 int __init acpi_debug_init(void)
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{
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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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if (acpi_disabled)
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return 0;
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/* 'debug_layer' [R/W] */
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name = ACPI_SYSTEM_FILE_DEBUG_LAYER;
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entry =
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create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir, acpi_system_read_debug,
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(void *)0);
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if (entry)
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entry->write_proc = acpi_system_write_debug;
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else
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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 =
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create_proc_read_entry(name, S_IFREG | S_IRUGO | S_IWUSR,
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acpi_root_dir, acpi_system_read_debug,
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(void *)1);
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if (entry)
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entry->write_proc = acpi_system_write_debug;
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else
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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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}
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subsys_initcall(acpi_debug_init);
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#endif
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