diff options
Diffstat (limited to 'drivers/acpi/parser/psxface.c')
| -rw-r--r-- | drivers/acpi/parser/psxface.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c index 4dcbd443160e..4c426f4c6af6 100644 --- a/drivers/acpi/parser/psxface.c +++ b/drivers/acpi/parser/psxface.c @@ -50,6 +50,10 @@ ACPI_MODULE_NAME("psxface") /* Local Prototypes */ +static void acpi_ps_start_trace(struct acpi_parameter_info *info); + +static void acpi_ps_stop_trace(struct acpi_parameter_info *info); + static acpi_status acpi_ps_execute_pass(struct acpi_parameter_info *info); static void @@ -57,6 +61,136 @@ acpi_ps_update_parameter_list(struct acpi_parameter_info *info, u16 action); /******************************************************************************* * + * FUNCTION: acpi_debug_trace + * + * PARAMETERS: method_name - Valid ACPI name string + * debug_level - Optional level mask. 0 to use default + * debug_layer - Optional layer mask. 0 to use default + * Flags - bit 1: one shot(1) or persistent(0) + * + * RETURN: Status + * + * DESCRIPTION: External interface to enable debug tracing during control + * method execution + * + ******************************************************************************/ + +acpi_status +acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags) +{ + acpi_status status; + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* TBDs: Validate name, allow full path or just nameseg */ + + acpi_gbl_trace_method_name = *(u32 *) name; + acpi_gbl_trace_flags = flags; + + if (debug_level) { + acpi_gbl_trace_dbg_level = debug_level; + } + if (debug_layer) { + acpi_gbl_trace_dbg_layer = debug_layer; + } + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_start_trace + * + * PARAMETERS: Info - Method info struct + * + * RETURN: None + * + * DESCRIPTION: Start control method execution trace + * + ******************************************************************************/ + +static void acpi_ps_start_trace(struct acpi_parameter_info *info) +{ + acpi_status status; + + ACPI_FUNCTION_ENTRY(); + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return; + } + + if ((!acpi_gbl_trace_method_name) || + (acpi_gbl_trace_method_name != info->node->name.integer)) { + goto exit; + } + + acpi_gbl_original_dbg_level = acpi_dbg_level; + acpi_gbl_original_dbg_layer = acpi_dbg_layer; + + acpi_dbg_level = 0x00FFFFFF; + acpi_dbg_layer = ACPI_UINT32_MAX; + + if (acpi_gbl_trace_dbg_level) { + acpi_dbg_level = acpi_gbl_trace_dbg_level; + } + if (acpi_gbl_trace_dbg_layer) { + acpi_dbg_layer = acpi_gbl_trace_dbg_layer; + } + + exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ps_stop_trace + * + * PARAMETERS: Info - Method info struct + * + * RETURN: None + * + * DESCRIPTION: Stop control method execution trace + * + ******************************************************************************/ + +static void acpi_ps_stop_trace(struct acpi_parameter_info *info) +{ + acpi_status status; + + ACPI_FUNCTION_ENTRY(); + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return; + } + + if ((!acpi_gbl_trace_method_name) || + (acpi_gbl_trace_method_name != info->node->name.integer)) { + goto exit; + } + + /* Disable further tracing if type is one-shot */ + + if (acpi_gbl_trace_flags & 1) { + acpi_gbl_trace_method_name = 0; + acpi_gbl_trace_dbg_level = 0; + acpi_gbl_trace_dbg_layer = 0; + } + + acpi_dbg_level = acpi_gbl_original_dbg_level; + acpi_dbg_layer = acpi_gbl_original_dbg_layer; + + exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); +} + +/******************************************************************************* + * * FUNCTION: acpi_ps_execute_method * * PARAMETERS: Info - Method info block, contains: @@ -104,6 +238,10 @@ acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info) */ acpi_ps_update_parameter_list(info, REF_INCREMENT); + /* Begin tracing if requested */ + + acpi_ps_start_trace(info); + /* * 1) Perform the first pass parse of the method to enter any * named objects that it creates into the namespace @@ -129,6 +267,10 @@ acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info) status = acpi_ps_execute_pass(info); cleanup: + /* End optional tracing */ + + acpi_ps_stop_trace(info); + /* Take away the extra reference that we gave the parameters above */ acpi_ps_update_parameter_list(info, REF_DECREMENT); |