31  * Firmware map entry. Because firmware memory maps are flat and not
43 	struct list_head	list;	/* entry for the linked list */
44 	struct kobject		kobj;   /* kobject for each entry */
52 static ssize_t start_show(struct firmware_map_entry *entry, char *buf);
53 static ssize_t end_show(struct firmware_map_entry *entry, char *buf);
54 static ssize_t type_show(struct firmware_map_entry *entry, char *buf);
65 	ssize_t (*show)(struct firmware_map_entry *entry, char *buf);
73  * These are default attributes that are added for every memmap entry.
93  * map entry is allocated by bootmem, we need to remember the storage and
108 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in release_firmware_map_entry()  local
110 	if (PageReserved(virt_to_page(entry))) {  in release_firmware_map_entry()
113 		 * the memory is hot-added again. The entry will be added to  in release_firmware_map_entry()
118 		list_add(&entry->list, &map_entries_bootmem);  in release_firmware_map_entry()
124 	kfree(entry);  in release_firmware_map_entry()
138  * firmware_map_add_entry() - Does the real work to add a firmware memmap entry.
142  * @entry: Pre-allocated (either kmalloc() or bootmem allocator), uninitialised
143  *         entry.
152 				  struct firmware_map_entry *entry)  in firmware_map_add_entry()  argument
156 	entry->start = start;  in firmware_map_add_entry()
157 	entry->end = end - 1;  in firmware_map_add_entry()
158 	entry->type = type;  in firmware_map_add_entry()
159 	INIT_LIST_HEAD(&entry->list);  in firmware_map_add_entry()
160 	kobject_init(&entry->kobj, &memmap_ktype);  in firmware_map_add_entry()
163 	list_add_tail(&entry->list, &map_entries);  in firmware_map_add_entry()
171  * memmap entry.
172  * @entry: removed entry.
176 static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)  in firmware_map_remove_entry()  argument
178 	list_del(&entry->list);  in firmware_map_remove_entry()
182  * Add memmap entry on sysfs
184 static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in add_sysfs_fw_map_entry()  argument
189 	if (entry->kobj.state_in_sysfs)  in add_sysfs_fw_map_entry()
198 	entry->kobj.kset = mmap_kset;  in add_sysfs_fw_map_entry()
199 	if (kobject_add(&entry->kobj, NULL, "%d", map_entries_nr++))  in add_sysfs_fw_map_entry()
200 		kobject_put(&entry->kobj);  in add_sysfs_fw_map_entry()
206  * Remove memmap entry on sysfs
208 static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in remove_sysfs_fw_map_entry()  argument
210 	kobject_put(&entry->kobj);  in remove_sysfs_fw_map_entry()
214  * firmware_map_find_entry_in_list() - Search memmap entry in a given list.
218  * @list:  In which to find the entry.
222  * the lock until the processing of the returned entry has completed.
224  * Return: Pointer to the entry to be found on success, or NULL on failure.
230 	struct firmware_map_entry *entry;  in firmware_map_find_entry_in_list()  local
232 	list_for_each_entry(entry, list, list)  in firmware_map_find_entry_in_list()
233 		if ((entry->start == start) && (entry->end == end) &&  in firmware_map_find_entry_in_list()
234 		    (!strcmp(entry->type, type))) {  in firmware_map_find_entry_in_list()
235 			return entry;  in firmware_map_find_entry_in_list()
242  * firmware_map_find_entry() - Search memmap entry in map_entries.
249  * until the processing of the returned entry has completed.
251  * Return: Pointer to the entry to be found on success, or NULL on failure.
260  * firmware_map_find_entry_bootmem() - Search memmap entry in map_entries_bootmem.
266  * given entry in map_entries_bootmem.
268  * Return: Pointer to the entry to be found on success, or NULL on failure.
278  * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
284  * Adds a firmware mapping entry. This function is for memory hotplug, it is
286  * it will create the syfs entry dynamically.
292 	struct firmware_map_entry *entry;  in firmware_map_add_hotplug()  local
294 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_add_hotplug()
295 	if (entry)  in firmware_map_add_hotplug()
298 	entry = firmware_map_find_entry_bootmem(start, end - 1, type);  in firmware_map_add_hotplug()
299 	if (!entry) {  in firmware_map_add_hotplug()
300 		entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC);  in firmware_map_add_hotplug()
301 		if (!entry)  in firmware_map_add_hotplug()
306 		list_del(&entry->list);  in firmware_map_add_hotplug()
309 		memset(entry, 0, sizeof(*entry));  in firmware_map_add_hotplug()
312 	firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_hotplug()
313 	/* create the memmap entry */  in firmware_map_add_hotplug()
314 	add_sysfs_fw_map_entry(entry);  in firmware_map_add_hotplug()
320  * firmware_map_add_early() - Adds a firmware mapping entry.
325  * Adds a firmware mapping entry. This function uses the bootmem allocator
334 	struct firmware_map_entry *entry;  in firmware_map_add_early()  local
336 	entry = memblock_virt_alloc(sizeof(struct firmware_map_entry), 0);  in firmware_map_add_early()
337 	if (WARN_ON(!entry))  in firmware_map_add_early()
340 	return firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_early()
344  * firmware_map_remove() - remove a firmware mapping entry
349  * removes a firmware mapping entry.
351  * Return: 0 on success, or -EINVAL if no entry.
355 	struct firmware_map_entry *entry;  in firmware_map_remove()  local
358 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_remove()
359 	if (!entry) {  in firmware_map_remove()
364 	firmware_map_remove_entry(entry);  in firmware_map_remove()
367 	/* remove the memmap entry */  in firmware_map_remove()
368 	remove_sysfs_fw_map_entry(entry);  in firmware_map_remove()
377 static ssize_t start_show(struct firmware_map_entry *entry, char *buf)  in start_show()  argument
380 		(unsigned long long)entry->start);  in start_show()
383 static ssize_t end_show(struct firmware_map_entry *entry, char *buf)  in end_show()  argument
386 		(unsigned long long)entry->end);  in end_show()
389 static ssize_t type_show(struct firmware_map_entry *entry, char *buf)  in type_show()  argument
391 	return snprintf(buf, PAGE_SIZE, "%s\n", entry->type);  in type_show()
402 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in memmap_attr_show()  local
405 	return memmap_attr->show(entry, buf);  in memmap_attr_show()
418 	struct firmware_map_entry *entry;  in firmware_memmap_init()  local
420 	list_for_each_entry(entry, &map_entries, list)  in firmware_memmap_init()
421 		add_sysfs_fw_map_entry(entry);  in firmware_memmap_init()