To give people easily an idea what could be WMI driven on their system. Introduces: wmi.debug=[01]
Tested on an acer: ACPI: WMI: DEBUG Event INTEGER_TYPE - 65535 Situation where a driver registers for specific event and debug handler gets overridden and set again if the registering driver gets unloaded again is untested, but should work. Signed-off-by: Thomas Renninger <[email protected]> CC: [email protected] CC: [email protected] CC: [email protected] --- drivers/platform/x86/wmi.c | 58 +++++++++++++++++++++++++++++++++++++------ 1 files changed, 50 insertions(+), 8 deletions(-) diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 39ec5b6..dbd7281 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -81,6 +81,11 @@ static struct wmi_block wmi_blocks; #define ACPI_WMI_STRING 0x4 /* GUID takes & returns a string */ #define ACPI_WMI_EVENT 0x8 /* GUID is an event */ +static int debug; +module_param(debug, bool, 0444); +MODULE_PARM_DESC(debug, + "Debug facility to log WMI Events [0/1]"); + static int acpi_wmi_remove(struct acpi_device *device, int type); static int acpi_wmi_add(struct acpi_device *device); static void acpi_wmi_notify(struct acpi_device *device, u32 event); @@ -477,6 +482,37 @@ const struct acpi_buffer *in) } EXPORT_SYMBOL_GPL(wmi_set_block); +static void wmi_notify_debug(u32 value, void *context) +{ + struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + + wmi_get_event_data(value, &response); + + obj = (union acpi_object *)response.pointer; + + if (!obj) + return; + + printk(KERN_INFO PREFIX "DEBUG Event "); + switch(obj->type) { + case ACPI_TYPE_BUFFER: + printk("BUFFER_TYPE - length %d\n", obj->buffer.length); + break; + case ACPI_TYPE_STRING: + printk("STRING_TYPE - %s\n", obj->string.pointer); + break; + case ACPI_TYPE_INTEGER: + printk("INTEGER_TYPE - %llu\n", obj->integer.value); + break; + case ACPI_TYPE_PACKAGE: + printk("PACKAGE_TYPE - %d elements\n", obj->package.count); + break; + default: + printk("object type 0x%X\n", obj->type); + } +} + /** * wmi_install_notify_handler - Register handler for WMI events * @handler: Function to handle notifications @@ -496,7 +532,7 @@ wmi_notify_handler handler, void *data) if (!find_guid(guid, &block)) return AE_NOT_EXIST; - if (block->handler) + if (block->handler && block->handler != wmi_notify_debug) return AE_ALREADY_ACQUIRED; block->handler = handler; @@ -516,7 +552,7 @@ EXPORT_SYMBOL_GPL(wmi_install_notify_handler); acpi_status wmi_remove_notify_handler(const char *guid) { struct wmi_block *block; - acpi_status status; + acpi_status status = AE_OK; if (!guid) return AE_BAD_PARAMETER; @@ -524,14 +560,16 @@ acpi_status wmi_remove_notify_handler(const char *guid) if (!find_guid(guid, &block)) return AE_NOT_EXIST; - if (!block->handler) + if (!block->handler || block->handler == wmi_notify_debug) return AE_NULL_ENTRY; - status = wmi_method_enable(block, 0); - - block->handler = NULL; - block->handler_data = NULL; - + if (debug) { + block->handler = wmi_notify_debug; + } else { + status = wmi_method_enable(block, 0); + block->handler = NULL; + block->handler_data = NULL; + } return status; } EXPORT_SYMBOL_GPL(wmi_remove_notify_handler); @@ -782,6 +820,10 @@ static __init acpi_status parse_wdg(acpi_handle handle) wblock->gblock = gblock[i]; wblock->handle = handle; + if (debug) { + wblock->handler = wmi_notify_debug; + status = wmi_method_enable(wblock, 1); + } list_add_tail(&wblock->list, &wmi_blocks.list); } -- 1.6.3 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
