80 static int debug_prolog_level_fn(debug_info_t *id,
83 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,
86 static int debug_prolog_pages_fn(debug_info_t *id,
89 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,
92 static int debug_input_flush_fn(debug_info_t *id, struct debug_view *view,
95 static int debug_hex_ascii_format_fn(debug_info_t *id, struct debug_view *view,
438 	debug_info_t *id;  in debug_next_entry()  local
440 	id = p_info->debug_info_snap;  in debug_next_entry()
446 	if (!id->areas)  in debug_next_entry()
448 	p_info->act_entry += id->entry_size;  in debug_next_entry()
450 	if (p_info->act_entry > (PAGE_SIZE - id->entry_size)) {  in debug_next_entry()
454 		if ((p_info->act_page % id->pages_per_area) == 0) {  in debug_next_entry()
459 		if (p_info->act_area >= id->nr_areas)  in debug_next_entry()
495 	debug_info_t *id;  in debug_prev_entry()  local
497 	id = p_info->debug_info_snap;  in debug_prev_entry()
500 	if (!id->areas)  in debug_prev_entry()
502 	p_info->act_entry -= id->entry_size;  in debug_prev_entry()
506 		p_info->act_entry = rounddown(PAGE_SIZE, id->entry_size) - id->entry_size;  in debug_prev_entry()
511 			p_info->act_page = id->pages_per_area - 1;  in debug_prev_entry()
514 			p_info->act_area = (id->nr_areas - 1) % id->nr_areas;  in debug_prev_entry()
517 	if (id->active_area == p_info->act_area &&  in debug_prev_entry()
518 	    id->active_pages[id->active_area] == p_info->act_page &&  in debug_prev_entry()
519 	    id->active_entries[id->active_area] == p_info->act_entry)  in debug_prev_entry()
732 ssize_t debug_dump(debug_info_t *id, struct debug_view *view,  in debug_dump()  argument
743 	p_info = debug_file_private_alloc(id, view);  in debug_dump()
763 static void _debug_register(debug_info_t *id)  in _debug_register()  argument
766 	id->debugfs_root_entry = debugfs_create_dir(id->name,  in _debug_register()
772 		debug_area_first = id;  in _debug_register()
773 		id->prev = NULL;  in _debug_register()
776 		debug_area_last->next = id;  in _debug_register()
777 		id->prev = debug_area_last;  in _debug_register()
779 	debug_area_last = id;  in _debug_register()
780 	id->next = NULL;  in _debug_register()
782 	debug_register_view(id, &debug_level_view);  in _debug_register()
783 	debug_register_view(id, &debug_flush_view);  in _debug_register()
784 	debug_register_view(id, &debug_pages_view);  in _debug_register()
866 void debug_register_static(debug_info_t *id, int pages_per_area, int nr_areas)  in debug_register_static()  argument
873 		       id->name);  in debug_register_static()
877 	copy = debug_info_alloc("", pages_per_area, nr_areas, id->buf_size,  in debug_register_static()
878 				id->level, ALL_AREAS);  in debug_register_static()
880 		pr_err("Registering debug feature %s failed\n", id->name);  in debug_register_static()
883 		spin_lock_irqsave(&id->lock, flags);  in debug_register_static()
884 		id->areas = NULL;  in debug_register_static()
885 		id->active_pages = NULL;  in debug_register_static()
886 		id->active_entries = NULL;  in debug_register_static()
887 		spin_unlock_irqrestore(&id->lock, flags);  in debug_register_static()
893 	spin_lock_irqsave(&id->lock, flags);  in debug_register_static()
894 	debug_events_append(copy, id);  in debug_register_static()
895 	debug_areas_swap(id, copy);  in debug_register_static()
896 	spin_unlock_irqrestore(&id->lock, flags);  in debug_register_static()
905 	_debug_register(id);  in debug_register_static()
910 static void _debug_unregister(debug_info_t *id)  in _debug_unregister()  argument
915 		if (!id->views[i])  in _debug_unregister()
917 		debugfs_remove(id->debugfs_entries[i]);  in _debug_unregister()
919 	debugfs_remove(id->debugfs_root_entry);  in _debug_unregister()
920 	if (id == debug_area_first)  in _debug_unregister()
921 		debug_area_first = id->next;  in _debug_unregister()
922 	if (id == debug_area_last)  in _debug_unregister()
923 		debug_area_last = id->prev;  in _debug_unregister()
924 	if (id->prev)  in _debug_unregister()
925 		id->prev->next = id->next;  in _debug_unregister()
926 	if (id->next)  in _debug_unregister()
927 		id->next->prev = id->prev;  in _debug_unregister()
938 void debug_unregister(debug_info_t *id)  in debug_unregister()  argument
940 	if (!id)  in debug_unregister()
943 	_debug_unregister(id);  in debug_unregister()
946 	debug_info_put(id);  in debug_unregister()
954 static int debug_set_size(debug_info_t *id, int nr_areas, int pages_per_area)  in debug_set_size()  argument
959 	if (!id || (nr_areas <= 0) || (pages_per_area < 0))  in debug_set_size()
962 	new_id = debug_info_alloc("", pages_per_area, nr_areas, id->buf_size,  in debug_set_size()
963 				  id->level, ALL_AREAS);  in debug_set_size()
970 	spin_lock_irqsave(&id->lock, flags);  in debug_set_size()
971 	debug_events_append(new_id, id);  in debug_set_size()
972 	debug_areas_swap(new_id, id);  in debug_set_size()
974 	spin_unlock_irqrestore(&id->lock, flags);  in debug_set_size()
975 	pr_info("%s: set new size (%i pages)\n", id->name, pages_per_area);  in debug_set_size()
989 void debug_set_level(debug_info_t *id, int new_level)  in debug_set_level()  argument
993 	if (!id)  in debug_set_level()
997 		pr_info("%s: switched off\n", id->name);  in debug_set_level()
1000 			id->name, new_level, 0, DEBUG_MAX_LEVEL);  in debug_set_level()
1004 	spin_lock_irqsave(&id->lock, flags);  in debug_set_level()
1005 	id->level = new_level;  in debug_set_level()
1006 	spin_unlock_irqrestore(&id->lock, flags);  in debug_set_level()
1014 static inline void proceed_active_entry(debug_info_t *id)  in proceed_active_entry()  argument
1016 	if ((id->active_entries[id->active_area] += id->entry_size)  in proceed_active_entry()
1017 	    > (PAGE_SIZE - id->entry_size)) {  in proceed_active_entry()
1018 		id->active_entries[id->active_area] = 0;  in proceed_active_entry()
1019 		id->active_pages[id->active_area] =  in proceed_active_entry()
1020 			(id->active_pages[id->active_area] + 1) %  in proceed_active_entry()
1021 			id->pages_per_area;  in proceed_active_entry()
1029 static inline void proceed_active_area(debug_info_t *id)  in proceed_active_area()  argument
1031 	id->active_area++;  in proceed_active_area()
1032 	id->active_area = id->active_area % id->nr_areas;  in proceed_active_area()
1038 static inline debug_entry_t *get_active_entry(debug_info_t *id)  in get_active_entry()  argument
1040 	return (debug_entry_t *) (((char *) id->areas[id->active_area]  in get_active_entry()
1041 				   [id->active_pages[id->active_area]]) +  in get_active_entry()
1042 				  id->active_entries[id->active_area]);  in get_active_entry()
1086 static inline void debug_finish_entry(debug_info_t *id, debug_entry_t *active,  in debug_finish_entry()  argument
1100 	proceed_active_entry(id);  in debug_finish_entry()
1102 		proceed_active_area(id);  in debug_finish_entry()
1179 debug_entry_t *debug_event_common(debug_info_t *id, int level, const void *buf,  in debug_event_common()  argument
1185 	if (!debug_active || !id->areas)  in debug_event_common()
1188 		if (!spin_trylock_irqsave(&id->lock, flags))  in debug_event_common()
1191 		spin_lock_irqsave(&id->lock, flags);  in debug_event_common()
1194 		active = get_active_entry(id);  in debug_event_common()
1195 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_event_common()
1196 		if (len < id->buf_size)  in debug_event_common()
1197 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_event_common()
1198 		debug_finish_entry(id, active, level, 0);  in debug_event_common()
1199 		len -= id->buf_size;  in debug_event_common()
1200 		buf += id->buf_size;  in debug_event_common()
1203 	spin_unlock_irqrestore(&id->lock, flags);  in debug_event_common()
1212 debug_entry_t *debug_exception_common(debug_info_t *id, int level,  in debug_exception_common()  argument
1218 	if (!debug_active || !id->areas)  in debug_exception_common()
1221 		if (!spin_trylock_irqsave(&id->lock, flags))  in debug_exception_common()
1224 		spin_lock_irqsave(&id->lock, flags);  in debug_exception_common()
1227 		active = get_active_entry(id);  in debug_exception_common()
1228 		memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size));  in debug_exception_common()
1229 		if (len < id->buf_size)  in debug_exception_common()
1230 			memset((DEBUG_DATA(active)) + len, 0, id->buf_size - len);  in debug_exception_common()
1231 		debug_finish_entry(id, active, level, len <= id->buf_size);  in debug_exception_common()
1232 		len -= id->buf_size;  in debug_exception_common()
1233 		buf += id->buf_size;  in debug_exception_common()
1236 	spin_unlock_irqrestore(&id->lock, flags);  in debug_exception_common()
1258 debug_entry_t *__debug_sprintf_event(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_event()  argument
1266 	if (!debug_active || !id->areas)  in __debug_sprintf_event()
1271 		if (!spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_event()
1274 		spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_event()
1276 	active = get_active_entry(id);  in __debug_sprintf_event()
1280 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_event()
1283 	debug_finish_entry(id, active, level, 0);  in __debug_sprintf_event()
1284 	spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_event()
1293 debug_entry_t *__debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)  in __debug_sprintf_exception()  argument
1301 	if (!debug_active || !id->areas)  in __debug_sprintf_exception()
1307 		if (!spin_trylock_irqsave(&id->lock, flags))  in __debug_sprintf_exception()
1310 		spin_lock_irqsave(&id->lock, flags);  in __debug_sprintf_exception()
1312 	active = get_active_entry(id);  in __debug_sprintf_exception()
1316 	for (idx = 0; idx < min(numargs, (int)(id->buf_size / sizeof(long)) - 1); idx++)  in __debug_sprintf_exception()
1319 	debug_finish_entry(id, active, level, 1);  in __debug_sprintf_exception()
1320 	spin_unlock_irqrestore(&id->lock, flags);  in __debug_sprintf_exception()
1337 int debug_register_view(debug_info_t *id, struct debug_view *view)  in debug_register_view()  argument
1345 	if (!id)  in debug_register_view()
1347 	mode = (id->mode | S_IFREG) & ~S_IXUGO;  in debug_register_view()
1352 	pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,  in debug_register_view()
1353 				  id, &debug_file_ops);  in debug_register_view()
1354 	spin_lock_irqsave(&id->lock, flags);  in debug_register_view()
1356 		if (!id->views[i])  in debug_register_view()
1362 		id->views[i] = view;  in debug_register_view()
1363 		id->debugfs_entries[i] = pde;  in debug_register_view()
1365 	spin_unlock_irqrestore(&id->lock, flags);  in debug_register_view()
1368 		       "number of views %i\n", id->name, view->name, i);  in debug_register_view()
1387 int debug_unregister_view(debug_info_t *id, struct debug_view *view)  in debug_unregister_view()  argument
1393 	if (!id)  in debug_unregister_view()
1395 	spin_lock_irqsave(&id->lock, flags);  in debug_unregister_view()
1397 		if (id->views[i] == view)  in debug_unregister_view()
1403 		dentry = id->debugfs_entries[i];  in debug_unregister_view()
1404 		id->views[i] = NULL;  in debug_unregister_view()
1405 		id->debugfs_entries[i] = NULL;  in debug_unregister_view()
1407 	spin_unlock_irqrestore(&id->lock, flags);  in debug_unregister_view()
1454 static int debug_prolog_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_pages_fn()  argument
1457 	return scnprintf(out_buf, out_buf_size, "%i\n", id->pages_per_area);  in debug_prolog_pages_fn()
1464 static int debug_input_pages_fn(debug_info_t *id, struct debug_view *view,  in debug_input_pages_fn()  argument
1487 	rc = debug_set_size(id, id->nr_areas, new_pages);  in debug_input_pages_fn()
1503 static int debug_prolog_level_fn(debug_info_t *id, struct debug_view *view,  in debug_prolog_level_fn()  argument
1508 	if (id->level == DEBUG_OFF_LEVEL)  in debug_prolog_level_fn()
1511 		rc = scnprintf(out_buf, out_buf_size, "%i\n", id->level);  in debug_prolog_level_fn()
1518 static int debug_input_level_fn(debug_info_t *id, struct debug_view *view,  in debug_input_level_fn()  argument
1537 		debug_set_level(id, DEBUG_OFF_LEVEL);  in debug_input_level_fn()
1547 		debug_set_level(id, new_level);  in debug_input_level_fn()
1560 static void debug_flush(debug_info_t *id, int area)  in debug_flush()  argument
1565 	if (!id || !id->areas)  in debug_flush()
1567 	spin_lock_irqsave(&id->lock, flags);  in debug_flush()
1569 		id->active_area = 0;  in debug_flush()
1570 		memset(id->active_entries, 0, id->nr_areas * sizeof(int));  in debug_flush()
1571 		for (i = 0; i < id->nr_areas; i++) {  in debug_flush()
1572 			id->active_pages[i] = 0;  in debug_flush()
1573 			for (j = 0; j < id->pages_per_area; j++)  in debug_flush()
1574 				memset(id->areas[i][j], 0, PAGE_SIZE);  in debug_flush()
1576 	} else if (area >= 0 && area < id->nr_areas) {  in debug_flush()
1577 		id->active_entries[area] = 0;  in debug_flush()
1578 		id->active_pages[area] = 0;  in debug_flush()
1579 		for (i = 0; i < id->pages_per_area; i++)  in debug_flush()
1580 			memset(id->areas[area][i], 0, PAGE_SIZE);  in debug_flush()
1582 	spin_unlock_irqrestore(&id->lock, flags);  in debug_flush()
1588 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()