79 static int debug_prolog_level_fn(debug_info_t *id,
82 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,
85 static int debug_prolog_pages_fn(debug_info_t *id,
88 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,
91 static int debug_input_flush_fn(debug_info_t *id, struct debug_view *view,
94 static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
436 	debug_info_t *id;  in debug_next_entry()  local
438 	id = p_info->debug_info_snap;  in debug_next_entry()
444 	if (!id->areas)  in debug_next_entry()
446 	p_info->act_entry += id->entry_size;  in debug_next_entry()
448 	if (p_info->act_entry > (PAGE_SIZE - id->entry_size)) {  in debug_next_entry()
452 		if ((p_info->act_page % id->pages_per_area) == 0) {  in debug_next_entry()
457 		if (p_info->act_area >= id->nr_areas)  in debug_next_entry()
493 	debug_info_t *id;  in debug_prev_entry()  local
495 	id = p_info->debug_info_snap;  in debug_prev_entry()
498 	if (!id->areas)  in debug_prev_entry()
500 	p_info->act_entry -= id->entry_size;  in debug_prev_entry()
504 		p_info->act_entry = rounddown(PAGE_SIZE, id->entry_size) - id->entry_size;  in debug_prev_entry()
509 			p_info->act_page = id->pages_per_area - 1;  in debug_prev_entry()
512 			p_info->act_area = (id->nr_areas - 1) % id->nr_areas;  in debug_prev_entry()
515 	if (id->active_area == p_info->act_area &&  in debug_prev_entry()
516 	    id->active_pages[id->active_area] == p_info->act_page &&  in debug_prev_entry()
517 	    id->active_entries[id->active_area] == p_info->act_entry)  in debug_prev_entry()
730 ssize_t debug_dump(debug_info_t *id, struct debug_view *view,  in debug_dump()  argument
741 	p_info = debug_file_private_alloc(id, view);  in debug_dump()
761 static void _debug_register(debug_info_t *id)  in _debug_register()  argument
764 	id->debugfs_root_entry = debugfs_create_dir(id->name,  in _debug_register()
770 		debug_area_first = id;  in _debug_register()
771 		id->prev = NULL;  in _debug_register()
774 		debug_area_last->next = id;  in _debug_register()
775 		id->prev = debug_area_last;  in _debug_register()
777 	debug_area_last = id;  in _debug_register()
778 	id->next = NULL;  in _debug_register()
780 	debug_register_view(id, &debug_level_view);  in _debug_register()
781 	debug_register_view(id, &debug_flush_view);  in _debug_register()
782 	debug_register_view(id, &debug_pages_view);  in _debug_register()
864 void debug_register_static(debug_info_t *id, int pages_per_area, int nr_areas)  in debug_register_static()  argument
871 		       id->name);  in debug_register_static()
875 	copy = debug_info_alloc("", pages_per_area, nr_areas, id->buf_size,  in debug_register_static()
876 				id->level, ALL_AREAS);  in debug_register_static()
878 		pr_err("Registering debug feature %s failed\n", id->name);  in debug_register_static()
881 		raw_spin_lock_irqsave(&id->lock, flags);  in debug_register_static()
882 		id->areas = NULL;  in debug_register_static()
883 		id->active_pages = NULL;  in debug_register_static()
884 		id->active_entries = NULL;  in debug_register_static()
885 		raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_register_static()
891 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_register_static()
892 	debug_events_append(copy, id);  in debug_register_static()
893 	debug_areas_swap(id, copy);  in debug_register_static()
894 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_register_static()
903 	_debug_register(id);  in debug_register_static()
908 static void _debug_unregister(debug_info_t *id)  in _debug_unregister()  argument
913 		if (!id->views[i])  in _debug_unregister()
915 		debugfs_remove(id->debugfs_entries[i]);  in _debug_unregister()
917 	debugfs_remove(id->debugfs_root_entry);  in _debug_unregister()
918 	if (id == debug_area_first)  in _debug_unregister()
919 		debug_area_first = id->next;  in _debug_unregister()
920 	if (id == debug_area_last)  in _debug_unregister()
921 		debug_area_last = id->prev;  in _debug_unregister()
922 	if (id->prev)  in _debug_unregister()
923 		id->prev->next = id->next;  in _debug_unregister()
924 	if (id->next)  in _debug_unregister()
925 		id->next->prev = id->prev;  in _debug_unregister()
936 void debug_unregister(debug_info_t *id)  in debug_unregister()  argument
938 	if (!id)  in debug_unregister()
941 	_debug_unregister(id);  in debug_unregister()
944 	debug_info_put(id);  in debug_unregister()
952 static int debug_set_size(debug_info_t *id, int nr_areas, int pages_per_area)  in debug_set_size()  argument
957 	if (!id || (nr_areas <= 0) || (pages_per_area < 0))  in debug_set_size()
960 	new_id = debug_info_alloc("", pages_per_area, nr_areas, id->buf_size,  in debug_set_size()
961 				  id->level, ALL_AREAS);  in debug_set_size()
968 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_set_size()
969 	debug_events_append(new_id, id);  in debug_set_size()
970 	debug_areas_swap(new_id, id);  in debug_set_size()
971 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_set_size()
973 	pr_info("%s: set new size (%i pages)\n", id->name, pages_per_area);  in debug_set_size()
987 void debug_set_level(debug_info_t *id, int new_level)  in debug_set_level()  argument
991 	if (!id)  in debug_set_level()
995 		pr_info("%s: switched off\n", id->name);  in debug_set_level()
998 			id->name, new_level, 0, DEBUG_MAX_LEVEL);  in debug_set_level()
1002 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_set_level()
1003 	id->level = new_level;  in debug_set_level()
1004 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_set_level()
1012 static inline void proceed_active_entry(debug_info_t *id)  in proceed_active_entry()  argument
1014 	if ((id->active_entries[id->active_area] += id->entry_size)  in proceed_active_entry()
1015 	    > (PAGE_SIZE - id->entry_size)) {  in proceed_active_entry()
1016 		id->active_entries[id->active_area] = 0;  in proceed_active_entry()
1017 		id->active_pages[id->active_area] =  in proceed_active_entry()
1018 			(id->active_pages[id->active_area] + 1) %  in proceed_active_entry()
1019 			id->pages_per_area;  in proceed_active_entry()
1027 static inline void proceed_active_area(debug_info_t *id)  in proceed_active_area()  argument
1029 	id->active_area++;  in proceed_active_area()
1030 	id->active_area = id->active_area % id->nr_areas;  in proceed_active_area()
1036 static inline debug_entry_t *get_active_entry(debug_info_t *id)  in get_active_entry()  argument
1038 	return (debug_entry_t *) (((char *) id->areas[id->active_area]  in get_active_entry()
1039 				   [id->active_pages[id->active_area]]) +  in get_active_entry()
1040 				  id->active_entries[id->active_area]);  in get_active_entry()
1084 static inline void debug_finish_entry(debug_info_t *id, debug_entry_t *active,  in debug_finish_entry()  argument
1098 	proceed_active_entry(id);  in debug_finish_entry()
1100 		proceed_active_area(id);  in debug_finish_entry()
1177 debug_entry_t *debug_event_common(debug_info_t *id, int level, const void *buf,  in debug_event_common()  argument
1183 	if (!debug_active || !id->areas)  in debug_event_common()
1186 		if (!raw_spin_trylock_irqsave(&id->lock, flags))  in debug_event_common()
1189 		raw_spin_lock_irqsave(&id->lock, flags);  in debug_event_common()
1192 		active = get_active_entry(id);  in debug_event_common()
1193 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_event_common()
1194 		if (len < id->buf_size)  in debug_event_common()
1195 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_event_common()
1196 		debug_finish_entry(id, active, level, 0);  in debug_event_common()
1197 		len -= id->buf_size;  in debug_event_common()
1198 		buf += id->buf_size;  in debug_event_common()
1201 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_event_common()
1210 debug_entry_t *debug_exception_common(debug_info_t *id, int level,  in debug_exception_common()  argument
1216 	if (!debug_active || !id->areas)  in debug_exception_common()
1219 		if (!raw_spin_trylock_irqsave(&id->lock, flags))  in debug_exception_common()
1222 		raw_spin_lock_irqsave(&id->lock, flags);  in debug_exception_common()
1225 		active = get_active_entry(id);  in debug_exception_common()
1226 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_exception_common()
1227 		if (len < id->buf_size)  in debug_exception_common()
1228 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_exception_common()
1229 		debug_finish_entry(id, active, level, len <= id->buf_size);  in debug_exception_common()
1230 		len -= id->buf_size;  in debug_exception_common()
1231 		buf += id->buf_size;  in debug_exception_common()
1234 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_exception_common()
1256 debug_entry_t *__debug_sprintf_event(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_event()  argument
1264 	if (!debug_active || !id->areas)  in __debug_sprintf_event()
1269 		if (!raw_spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_event()
1272 		raw_spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_event()
1274 	active = get_active_entry(id);  in __debug_sprintf_event()
1278 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_event()
1281 	debug_finish_entry(id, active, level, 0);  in __debug_sprintf_event()
1282 	raw_spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_event()
1291 debug_entry_t *__debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_exception()  argument
1299 	if (!debug_active || !id->areas)  in __debug_sprintf_exception()
1305 		if (!raw_spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_exception()
1308 		raw_spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_exception()
1310 	active = get_active_entry(id);  in __debug_sprintf_exception()
1314 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_exception()
1317 	debug_finish_entry(id, active, level, 1);  in __debug_sprintf_exception()
1318 	raw_spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_exception()
1335 int debug_register_view(debug_info_t *id, struct debug_view *view)  in debug_register_view()  argument
1343 	if (!id)  in debug_register_view()
1345 	mode = (id->mode | S_IFREG) & ~S_IXUGO;  in debug_register_view()
1350 	pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,  in debug_register_view()
1351 				  id, &debug_file_ops);  in debug_register_view()
1352 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_register_view()
1354 		if (!id->views[i])  in debug_register_view()
1360 		id->views[i] = view;  in debug_register_view()
1361 		id->debugfs_entries[i] = pde;  in debug_register_view()
1363 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_register_view()
1366 		       "number of views %i\n", id->name, view->name, i);  in debug_register_view()
1385 int debug_unregister_view(debug_info_t *id, struct debug_view *view)  in debug_unregister_view()  argument
1391 	if (!id)  in debug_unregister_view()
1393 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_unregister_view()
1395 		if (id->views[i] == view)  in debug_unregister_view()
1401 		dentry = id->debugfs_entries[i];  in debug_unregister_view()
1402 		id->views[i] = NULL;  in debug_unregister_view()
1403 		id->debugfs_entries[i] = NULL;  in debug_unregister_view()
1405 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_unregister_view()
1449 static int debug_prolog_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_pages_fn()  argument
1452 	return scnprintf(out_buf, out_buf_size, "%i\n", id->pages_per_area);  in debug_prolog_pages_fn()
1459 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_input_pages_fn()  argument
1482 	rc = debug_set_size(id, id->nr_areas, new_pages);  in debug_input_pages_fn()
1498 static int debug_prolog_level_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_level_fn()  argument
1503 	if (id->level == DEBUG_OFF_LEVEL)  in debug_prolog_level_fn()
1506 		rc = scnprintf(out_buf, out_buf_size, "%i\n", id->level);  in debug_prolog_level_fn()
1513 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,  in debug_input_level_fn()  argument
1532 		debug_set_level(id, DEBUG_OFF_LEVEL);  in debug_input_level_fn()
1542 		debug_set_level(id, new_level);  in debug_input_level_fn()
1555 static void debug_flush(debug_info_t *id, int area)  in debug_flush()  argument
1560 	if (!id || !id->areas)  in debug_flush()
1562 	raw_spin_lock_irqsave(&id->lock, flags);  in debug_flush()
1564 		id->active_area = 0;  in debug_flush()
1565 		memset(id->active_entries, 0, id->nr_areas * sizeof(int));  in debug_flush()
1566 		for (i = 0; i < id->nr_areas; i++) {  in debug_flush()
1567 			id->active_pages[i] = 0;  in debug_flush()
1568 			for (j = 0; j < id->pages_per_area; j++)  in debug_flush()
1569 				memset(id->areas[i][j], 0, PAGE_SIZE);  in debug_flush()
1571 	} else if (area >= 0 && area < id->nr_areas) {  in debug_flush()
1572 		id->active_entries[area] = 0;  in debug_flush()
1573 		id->active_pages[area] = 0;  in debug_flush()
1574 		for (i = 0; i < id->pages_per_area; i++)  in debug_flush()
1575 			memset(id->areas[area][i], 0, PAGE_SIZE);  in debug_flush()
1577 	raw_spin_unlock_irqrestore(&id->lock, flags);  in debug_flush()
1583 static int debug_input_flush_fn(debug_info_t *id, struct debug_view *view,  in debug_input_flush_fn()  argument
1606 		debug_flush(id, DEBUG_FLUSH_ALL);  in debug_input_flush_fn()
1612 		debug_flush(id, area);  in debug_input_flush_fn()
1627 static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,  in debug_hex_ascii_format_fn()  argument
1632 	for (i = 0; i < id->buf_size; i++) {  in debug_hex_ascii_format_fn()
1637 	for (i = 0; i < id->buf_size; i++) {  in debug_hex_ascii_format_fn()
1652 int debug_dflt_header_fn(debug_info_t *id, struct debug_view *view,  in debug_dflt_header_fn()  argument
1685 int debug_sprintf_format_fn(debug_info_t *id, struct debug_view *view,  in debug_sprintf_format_fn()  argument
1693 	num_longs = id->buf_size / sizeof(long);  in debug_sprintf_format_fn()