22  * Firmware map entry. Because firmware memory maps are flat and not
34 	struct list_head	list;	/* entry for the linked list */
35 	struct kobject		kobj;   /* kobject for each entry */
43 static ssize_t start_show(struct firmware_map_entry *entry, char *buf);
44 static ssize_t end_show(struct firmware_map_entry *entry, char *buf);
45 static ssize_t type_show(struct firmware_map_entry *entry, char *buf);
56 	ssize_t (*show)(struct firmware_map_entry *entry, char *buf);
64  * These are default attributes that are added for every memmap entry.
84  * map entry is allocated by bootmem, we need to remember the storage and
99 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in release_firmware_map_entry()  local
101 	if (PageReserved(virt_to_page(entry))) {  in release_firmware_map_entry()
104 		 * the memory is hot-added again. The entry will be added to  in release_firmware_map_entry()
109 		list_add(&entry->list, &map_entries_bootmem);  in release_firmware_map_entry()
115 	kfree(entry);  in release_firmware_map_entry()
129  * firmware_map_add_entry() - Does the real work to add a firmware memmap entry.
133  * @entry: Pre-allocated (either kmalloc() or bootmem allocator), uninitialised
134  *         entry.
143 				  struct firmware_map_entry *entry)  in firmware_map_add_entry()  argument
147 	entry->start = start;  in firmware_map_add_entry()
148 	entry->end = end - 1;  in firmware_map_add_entry()
149 	entry->type = type;  in firmware_map_add_entry()
150 	INIT_LIST_HEAD(&entry->list);  in firmware_map_add_entry()
151 	kobject_init(&entry->kobj, &memmap_ktype);  in firmware_map_add_entry()
154 	list_add_tail(&entry->list, &map_entries);  in firmware_map_add_entry()
162  * memmap entry.
163  * @entry: removed entry.
167 static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)  in firmware_map_remove_entry()  argument
169 	list_del(&entry->list);  in firmware_map_remove_entry()
173  * Add memmap entry on sysfs
175 static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in add_sysfs_fw_map_entry()  argument
180 	if (entry->kobj.state_in_sysfs)  in add_sysfs_fw_map_entry()
189 	entry->kobj.kset = mmap_kset;  in add_sysfs_fw_map_entry()
190 	if (kobject_add(&entry->kobj, NULL, "%d", map_entries_nr++))  in add_sysfs_fw_map_entry()
191 		kobject_put(&entry->kobj);  in add_sysfs_fw_map_entry()
197  * Remove memmap entry on sysfs
199 static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in remove_sysfs_fw_map_entry()  argument
201 	kobject_put(&entry->kobj);  in remove_sysfs_fw_map_entry()
205  * firmware_map_find_entry_in_list() - Search memmap entry in a given list.
209  * @list:  In which to find the entry.
213  * the lock until the processing of the returned entry has completed.
215  * Return: Pointer to the entry to be found on success, or NULL on failure.
221 	struct firmware_map_entry *entry;  in firmware_map_find_entry_in_list()  local
223 	list_for_each_entry(entry, list, list)  in firmware_map_find_entry_in_list()
224 		if ((entry->start == start) && (entry->end == end) &&  in firmware_map_find_entry_in_list()
225 		    (!strcmp(entry->type, type))) {  in firmware_map_find_entry_in_list()
226 			return entry;  in firmware_map_find_entry_in_list()
233  * firmware_map_find_entry() - Search memmap entry in map_entries.
240  * until the processing of the returned entry has completed.
242  * Return: Pointer to the entry to be found on success, or NULL on failure.
251  * firmware_map_find_entry_bootmem() - Search memmap entry in map_entries_bootmem.
257  * given entry in map_entries_bootmem.
259  * Return: Pointer to the entry to be found on success, or NULL on failure.
269  * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
275  * Adds a firmware mapping entry. This function is for memory hotplug, it is
277  * it will create the syfs entry dynamically.
283 	struct firmware_map_entry *entry;  in firmware_map_add_hotplug()  local
285 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_add_hotplug()
286 	if (entry)  in firmware_map_add_hotplug()
289 	entry = firmware_map_find_entry_bootmem(start, end - 1, type);  in firmware_map_add_hotplug()
290 	if (!entry) {  in firmware_map_add_hotplug()
291 		entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC);  in firmware_map_add_hotplug()
292 		if (!entry)  in firmware_map_add_hotplug()
297 		list_del(&entry->list);  in firmware_map_add_hotplug()
300 		memset(entry, 0, sizeof(*entry));  in firmware_map_add_hotplug()
303 	firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_hotplug()
304 	/* create the memmap entry */  in firmware_map_add_hotplug()
305 	add_sysfs_fw_map_entry(entry);  in firmware_map_add_hotplug()
311  * firmware_map_add_early() - Adds a firmware mapping entry.
316  * Adds a firmware mapping entry. This function uses the bootmem allocator
325 	struct firmware_map_entry *entry;  in firmware_map_add_early()  local
327 	entry = memblock_alloc(sizeof(struct firmware_map_entry),  in firmware_map_add_early()
329 	if (WARN_ON(!entry))  in firmware_map_add_early()
332 	return firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_early()
336  * firmware_map_remove() - remove a firmware mapping entry
341  * removes a firmware mapping entry.
343  * Return: 0 on success, or -EINVAL if no entry.
347 	struct firmware_map_entry *entry;  in firmware_map_remove()  local
350 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_remove()
351 	if (!entry) {  in firmware_map_remove()
356 	firmware_map_remove_entry(entry);  in firmware_map_remove()
359 	/* remove the memmap entry */  in firmware_map_remove()
360 	remove_sysfs_fw_map_entry(entry);  in firmware_map_remove()
369 static ssize_t start_show(struct firmware_map_entry *entry, char *buf)  in start_show()  argument
372 		(unsigned long long)entry->start);  in start_show()
375 static ssize_t end_show(struct firmware_map_entry *entry, char *buf)  in end_show()  argument
378 		(unsigned long long)entry->end);  in end_show()
381 static ssize_t type_show(struct firmware_map_entry *entry, char *buf)  in type_show()  argument
383 	return snprintf(buf, PAGE_SIZE, "%s\n", entry->type);  in type_show()
394 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in memmap_attr_show()  local
397 	return memmap_attr->show(entry, buf);  in memmap_attr_show()
410 	struct firmware_map_entry *entry;  in firmware_memmap_init()  local
412 	list_for_each_entry(entry, &map_entries, list)  in firmware_memmap_init()
413 		add_sysfs_fw_map_entry(entry);  in firmware_memmap_init()