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.
85  * map entry is allocated by bootmem, we need to remember the storage and
100 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in release_firmware_map_entry()  local
102 	if (PageReserved(virt_to_page(entry))) {  in release_firmware_map_entry()
105 		 * the memory is hot-added again. The entry will be added to  in release_firmware_map_entry()
110 		list_add(&entry->list, &map_entries_bootmem);  in release_firmware_map_entry()
116 	kfree(entry);  in release_firmware_map_entry()
130  * firmware_map_add_entry() - Does the real work to add a firmware memmap entry.
134  * @entry: Pre-allocated (either kmalloc() or bootmem allocator), uninitialised
135  *         entry.
144 				  struct firmware_map_entry *entry)  in firmware_map_add_entry()  argument
148 	entry->start = start;  in firmware_map_add_entry()
149 	entry->end = end - 1;  in firmware_map_add_entry()
150 	entry->type = type;  in firmware_map_add_entry()
151 	INIT_LIST_HEAD(&entry->list);  in firmware_map_add_entry()
152 	kobject_init(&entry->kobj, &memmap_ktype);  in firmware_map_add_entry()
155 	list_add_tail(&entry->list, &map_entries);  in firmware_map_add_entry()
163  * memmap entry.
164  * @entry: removed entry.
168 static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)  in firmware_map_remove_entry()  argument
170 	list_del(&entry->list);  in firmware_map_remove_entry()
174  * Add memmap entry on sysfs
176 static int add_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in add_sysfs_fw_map_entry()  argument
181 	if (entry->kobj.state_in_sysfs)  in add_sysfs_fw_map_entry()
190 	entry->kobj.kset = mmap_kset;  in add_sysfs_fw_map_entry()
191 	if (kobject_add(&entry->kobj, NULL, "%d", map_entries_nr++))  in add_sysfs_fw_map_entry()
192 		kobject_put(&entry->kobj);  in add_sysfs_fw_map_entry()
198  * Remove memmap entry on sysfs
200 static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)  in remove_sysfs_fw_map_entry()  argument
202 	kobject_put(&entry->kobj);  in remove_sysfs_fw_map_entry()
206  * firmware_map_find_entry_in_list() - Search memmap entry in a given list.
210  * @list:  In which to find the entry.
214  * the lock until the processing of the returned entry has completed.
216  * Return: Pointer to the entry to be found on success, or NULL on failure.
222 	struct firmware_map_entry *entry;  in firmware_map_find_entry_in_list()  local
224 	list_for_each_entry(entry, list, list)  in firmware_map_find_entry_in_list()
225 		if ((entry->start == start) && (entry->end == end) &&  in firmware_map_find_entry_in_list()
226 		    (!strcmp(entry->type, type))) {  in firmware_map_find_entry_in_list()
227 			return entry;  in firmware_map_find_entry_in_list()
234  * firmware_map_find_entry() - Search memmap entry in map_entries.
241  * until the processing of the returned entry has completed.
243  * Return: Pointer to the entry to be found on success, or NULL on failure.
252  * firmware_map_find_entry_bootmem() - Search memmap entry in map_entries_bootmem.
258  * given entry in map_entries_bootmem.
260  * Return: Pointer to the entry to be found on success, or NULL on failure.
270  * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
276  * Adds a firmware mapping entry. This function is for memory hotplug, it is
278  * it will create the syfs entry dynamically.
284 	struct firmware_map_entry *entry;  in firmware_map_add_hotplug()  local
286 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_add_hotplug()
287 	if (entry)  in firmware_map_add_hotplug()
290 	entry = firmware_map_find_entry_bootmem(start, end - 1, type);  in firmware_map_add_hotplug()
291 	if (!entry) {  in firmware_map_add_hotplug()
292 		entry = kzalloc(sizeof(struct firmware_map_entry), GFP_ATOMIC);  in firmware_map_add_hotplug()
293 		if (!entry)  in firmware_map_add_hotplug()
298 		list_del(&entry->list);  in firmware_map_add_hotplug()
301 		memset(entry, 0, sizeof(*entry));  in firmware_map_add_hotplug()
304 	firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_hotplug()
305 	/* create the memmap entry */  in firmware_map_add_hotplug()
306 	add_sysfs_fw_map_entry(entry);  in firmware_map_add_hotplug()
312  * firmware_map_add_early() - Adds a firmware mapping entry.
317  * Adds a firmware mapping entry. This function uses the bootmem allocator
326 	struct firmware_map_entry *entry;  in firmware_map_add_early()  local
328 	entry = memblock_alloc(sizeof(struct firmware_map_entry),  in firmware_map_add_early()
330 	if (WARN_ON(!entry))  in firmware_map_add_early()
333 	return firmware_map_add_entry(start, end, type, entry);  in firmware_map_add_early()
337  * firmware_map_remove() - remove a firmware mapping entry
342  * removes a firmware mapping entry.
344  * Return: 0 on success, or -EINVAL if no entry.
348 	struct firmware_map_entry *entry;  in firmware_map_remove()  local
351 	entry = firmware_map_find_entry(start, end - 1, type);  in firmware_map_remove()
352 	if (!entry) {  in firmware_map_remove()
357 	firmware_map_remove_entry(entry);  in firmware_map_remove()
360 	/* remove the memmap entry */  in firmware_map_remove()
361 	remove_sysfs_fw_map_entry(entry);  in firmware_map_remove()
370 static ssize_t start_show(struct firmware_map_entry *entry, char *buf)  in start_show()  argument
373 		(unsigned long long)entry->start);  in start_show()
376 static ssize_t end_show(struct firmware_map_entry *entry, char *buf)  in end_show()  argument
379 		(unsigned long long)entry->end);  in end_show()
382 static ssize_t type_show(struct firmware_map_entry *entry, char *buf)  in type_show()  argument
384 	return snprintf(buf, PAGE_SIZE, "%s\n", entry->type);  in type_show()
395 	struct firmware_map_entry *entry = to_memmap_entry(kobj);  in memmap_attr_show()  local
398 	return memmap_attr->show(entry, buf);  in memmap_attr_show()
411 	struct firmware_map_entry *entry;  in firmware_memmap_init()  local
413 	list_for_each_entry(entry, &map_entries, list)  in firmware_memmap_init()
414 		add_sysfs_fw_map_entry(entry);  in firmware_memmap_init()