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Commit | Line | Data |
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3947be19 DH |
1 | /* |
2 | * drivers/base/memory.c - basic Memory class support | |
3 | * | |
4 | * Written by Matt Tolentino <matthew.e.tolentino@intel.com> | |
5 | * Dave Hansen <haveblue@us.ibm.com> | |
6 | * | |
7 | * This file provides the necessary infrastructure to represent | |
8 | * a SPARSEMEM-memory-model system's physical memory in /sysfs. | |
9 | * All arch-independent code that assumes MEMORY_HOTPLUG requires | |
10 | * SPARSEMEM should be contained here, or in mm/memory_hotplug.c. | |
11 | */ | |
12 | ||
13 | #include <linux/sysdev.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
3947be19 | 16 | #include <linux/topology.h> |
c59ede7b | 17 | #include <linux/capability.h> |
3947be19 DH |
18 | #include <linux/device.h> |
19 | #include <linux/memory.h> | |
20 | #include <linux/kobject.h> | |
21 | #include <linux/memory_hotplug.h> | |
22 | #include <linux/mm.h> | |
da19cbcf | 23 | #include <linux/mutex.h> |
9f1b16a5 | 24 | #include <linux/stat.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
9f1b16a5 | 26 | |
3947be19 DH |
27 | #include <asm/atomic.h> |
28 | #include <asm/uaccess.h> | |
29 | ||
30 | #define MEMORY_CLASS_NAME "memory" | |
31 | ||
32 | static struct sysdev_class memory_sysdev_class = { | |
af5ca3f4 | 33 | .name = MEMORY_CLASS_NAME, |
3947be19 | 34 | }; |
3947be19 | 35 | |
312c004d | 36 | static const char *memory_uevent_name(struct kset *kset, struct kobject *kobj) |
3947be19 DH |
37 | { |
38 | return MEMORY_CLASS_NAME; | |
39 | } | |
40 | ||
9ec0fd4e | 41 | static int memory_uevent(struct kset *kset, struct kobject *obj, struct kobj_uevent_env *env) |
3947be19 DH |
42 | { |
43 | int retval = 0; | |
44 | ||
45 | return retval; | |
46 | } | |
47 | ||
9cd43611 | 48 | static const struct kset_uevent_ops memory_uevent_ops = { |
312c004d KS |
49 | .name = memory_uevent_name, |
50 | .uevent = memory_uevent, | |
3947be19 DH |
51 | }; |
52 | ||
e041c683 | 53 | static BLOCKING_NOTIFIER_HEAD(memory_chain); |
3947be19 | 54 | |
98a38ebd | 55 | int register_memory_notifier(struct notifier_block *nb) |
3947be19 | 56 | { |
e041c683 | 57 | return blocking_notifier_chain_register(&memory_chain, nb); |
3947be19 | 58 | } |
3c82c30c | 59 | EXPORT_SYMBOL(register_memory_notifier); |
3947be19 | 60 | |
98a38ebd | 61 | void unregister_memory_notifier(struct notifier_block *nb) |
3947be19 | 62 | { |
e041c683 | 63 | blocking_notifier_chain_unregister(&memory_chain, nb); |
3947be19 | 64 | } |
3c82c30c | 65 | EXPORT_SYMBOL(unregister_memory_notifier); |
3947be19 | 66 | |
925cc71e RJ |
67 | static ATOMIC_NOTIFIER_HEAD(memory_isolate_chain); |
68 | ||
69 | int register_memory_isolate_notifier(struct notifier_block *nb) | |
70 | { | |
71 | return atomic_notifier_chain_register(&memory_isolate_chain, nb); | |
72 | } | |
73 | EXPORT_SYMBOL(register_memory_isolate_notifier); | |
74 | ||
75 | void unregister_memory_isolate_notifier(struct notifier_block *nb) | |
76 | { | |
77 | atomic_notifier_chain_unregister(&memory_isolate_chain, nb); | |
78 | } | |
79 | EXPORT_SYMBOL(unregister_memory_isolate_notifier); | |
80 | ||
3947be19 DH |
81 | /* |
82 | * register_memory - Setup a sysfs device for a memory block | |
83 | */ | |
00a41db5 BP |
84 | static |
85 | int register_memory(struct memory_block *memory, struct mem_section *section) | |
3947be19 DH |
86 | { |
87 | int error; | |
88 | ||
89 | memory->sysdev.cls = &memory_sysdev_class; | |
90 | memory->sysdev.id = __section_nr(section); | |
91 | ||
92 | error = sysdev_register(&memory->sysdev); | |
3947be19 DH |
93 | return error; |
94 | } | |
95 | ||
96 | static void | |
00a41db5 | 97 | unregister_memory(struct memory_block *memory, struct mem_section *section) |
3947be19 DH |
98 | { |
99 | BUG_ON(memory->sysdev.cls != &memory_sysdev_class); | |
100 | BUG_ON(memory->sysdev.id != __section_nr(section)); | |
101 | ||
00a41db5 BP |
102 | /* drop the ref. we got in remove_memory_block() */ |
103 | kobject_put(&memory->sysdev.kobj); | |
3947be19 | 104 | sysdev_unregister(&memory->sysdev); |
3947be19 DH |
105 | } |
106 | ||
107 | /* | |
108 | * use this as the physical section index that this memsection | |
109 | * uses. | |
110 | */ | |
111 | ||
4a0b2b4d AK |
112 | static ssize_t show_mem_phys_index(struct sys_device *dev, |
113 | struct sysdev_attribute *attr, char *buf) | |
3947be19 DH |
114 | { |
115 | struct memory_block *mem = | |
116 | container_of(dev, struct memory_block, sysdev); | |
117 | return sprintf(buf, "%08lx\n", mem->phys_index); | |
118 | } | |
119 | ||
5c755e9f BP |
120 | /* |
121 | * Show whether the section of memory is likely to be hot-removable | |
122 | */ | |
1f07be1c SR |
123 | static ssize_t show_mem_removable(struct sys_device *dev, |
124 | struct sysdev_attribute *attr, char *buf) | |
5c755e9f BP |
125 | { |
126 | unsigned long start_pfn; | |
127 | int ret; | |
128 | struct memory_block *mem = | |
129 | container_of(dev, struct memory_block, sysdev); | |
130 | ||
131 | start_pfn = section_nr_to_pfn(mem->phys_index); | |
132 | ret = is_mem_section_removable(start_pfn, PAGES_PER_SECTION); | |
133 | return sprintf(buf, "%d\n", ret); | |
134 | } | |
135 | ||
3947be19 DH |
136 | /* |
137 | * online, offline, going offline, etc. | |
138 | */ | |
4a0b2b4d AK |
139 | static ssize_t show_mem_state(struct sys_device *dev, |
140 | struct sysdev_attribute *attr, char *buf) | |
3947be19 DH |
141 | { |
142 | struct memory_block *mem = | |
143 | container_of(dev, struct memory_block, sysdev); | |
144 | ssize_t len = 0; | |
145 | ||
146 | /* | |
147 | * We can probably put these states in a nice little array | |
148 | * so that they're not open-coded | |
149 | */ | |
150 | switch (mem->state) { | |
151 | case MEM_ONLINE: | |
152 | len = sprintf(buf, "online\n"); | |
153 | break; | |
154 | case MEM_OFFLINE: | |
155 | len = sprintf(buf, "offline\n"); | |
156 | break; | |
157 | case MEM_GOING_OFFLINE: | |
158 | len = sprintf(buf, "going-offline\n"); | |
159 | break; | |
160 | default: | |
161 | len = sprintf(buf, "ERROR-UNKNOWN-%ld\n", | |
162 | mem->state); | |
163 | WARN_ON(1); | |
164 | break; | |
165 | } | |
166 | ||
167 | return len; | |
168 | } | |
169 | ||
7b78d335 | 170 | int memory_notify(unsigned long val, void *v) |
3947be19 | 171 | { |
e041c683 | 172 | return blocking_notifier_call_chain(&memory_chain, val, v); |
3947be19 DH |
173 | } |
174 | ||
925cc71e RJ |
175 | int memory_isolate_notify(unsigned long val, void *v) |
176 | { | |
177 | return atomic_notifier_call_chain(&memory_isolate_chain, val, v); | |
178 | } | |
179 | ||
3947be19 DH |
180 | /* |
181 | * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is | |
182 | * OK to have direct references to sparsemem variables in here. | |
183 | */ | |
184 | static int | |
185 | memory_block_action(struct memory_block *mem, unsigned long action) | |
186 | { | |
187 | int i; | |
188 | unsigned long psection; | |
189 | unsigned long start_pfn, start_paddr; | |
190 | struct page *first_page; | |
191 | int ret; | |
192 | int old_state = mem->state; | |
193 | ||
194 | psection = mem->phys_index; | |
195 | first_page = pfn_to_page(psection << PFN_SECTION_SHIFT); | |
196 | ||
197 | /* | |
198 | * The probe routines leave the pages reserved, just | |
199 | * as the bootmem code does. Make sure they're still | |
200 | * that way. | |
201 | */ | |
202 | if (action == MEM_ONLINE) { | |
203 | for (i = 0; i < PAGES_PER_SECTION; i++) { | |
204 | if (PageReserved(first_page+i)) | |
205 | continue; | |
206 | ||
207 | printk(KERN_WARNING "section number %ld page number %d " | |
208 | "not reserved, was it already online? \n", | |
209 | psection, i); | |
210 | return -EBUSY; | |
211 | } | |
212 | } | |
213 | ||
214 | switch (action) { | |
215 | case MEM_ONLINE: | |
216 | start_pfn = page_to_pfn(first_page); | |
217 | ret = online_pages(start_pfn, PAGES_PER_SECTION); | |
218 | break; | |
219 | case MEM_OFFLINE: | |
220 | mem->state = MEM_GOING_OFFLINE; | |
3947be19 DH |
221 | start_paddr = page_to_pfn(first_page) << PAGE_SHIFT; |
222 | ret = remove_memory(start_paddr, | |
223 | PAGES_PER_SECTION << PAGE_SHIFT); | |
224 | if (ret) { | |
225 | mem->state = old_state; | |
226 | break; | |
227 | } | |
3947be19 DH |
228 | break; |
229 | default: | |
f810a5cf | 230 | WARN(1, KERN_WARNING "%s(%p, %ld) unknown action: %ld\n", |
2b3a302a | 231 | __func__, mem, action, action); |
3947be19 DH |
232 | ret = -EINVAL; |
233 | } | |
3947be19 DH |
234 | |
235 | return ret; | |
236 | } | |
237 | ||
238 | static int memory_block_change_state(struct memory_block *mem, | |
239 | unsigned long to_state, unsigned long from_state_req) | |
240 | { | |
241 | int ret = 0; | |
da19cbcf | 242 | mutex_lock(&mem->state_mutex); |
3947be19 DH |
243 | |
244 | if (mem->state != from_state_req) { | |
245 | ret = -EINVAL; | |
246 | goto out; | |
247 | } | |
248 | ||
249 | ret = memory_block_action(mem, to_state); | |
250 | if (!ret) | |
251 | mem->state = to_state; | |
252 | ||
253 | out: | |
da19cbcf | 254 | mutex_unlock(&mem->state_mutex); |
3947be19 DH |
255 | return ret; |
256 | } | |
257 | ||
258 | static ssize_t | |
4a0b2b4d AK |
259 | store_mem_state(struct sys_device *dev, |
260 | struct sysdev_attribute *attr, const char *buf, size_t count) | |
3947be19 DH |
261 | { |
262 | struct memory_block *mem; | |
263 | unsigned int phys_section_nr; | |
264 | int ret = -EINVAL; | |
265 | ||
266 | mem = container_of(dev, struct memory_block, sysdev); | |
267 | phys_section_nr = mem->phys_index; | |
268 | ||
540557b9 | 269 | if (!present_section_nr(phys_section_nr)) |
3947be19 DH |
270 | goto out; |
271 | ||
272 | if (!strncmp(buf, "online", min((int)count, 6))) | |
273 | ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE); | |
274 | else if(!strncmp(buf, "offline", min((int)count, 7))) | |
275 | ret = memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE); | |
276 | out: | |
277 | if (ret) | |
278 | return ret; | |
279 | return count; | |
280 | } | |
281 | ||
282 | /* | |
283 | * phys_device is a bad name for this. What I really want | |
284 | * is a way to differentiate between memory ranges that | |
285 | * are part of physical devices that constitute | |
286 | * a complete removable unit or fru. | |
287 | * i.e. do these ranges belong to the same physical device, | |
288 | * s.t. if I offline all of these sections I can then | |
289 | * remove the physical device? | |
290 | */ | |
4a0b2b4d AK |
291 | static ssize_t show_phys_device(struct sys_device *dev, |
292 | struct sysdev_attribute *attr, char *buf) | |
3947be19 DH |
293 | { |
294 | struct memory_block *mem = | |
295 | container_of(dev, struct memory_block, sysdev); | |
296 | return sprintf(buf, "%d\n", mem->phys_device); | |
297 | } | |
298 | ||
299 | static SYSDEV_ATTR(phys_index, 0444, show_mem_phys_index, NULL); | |
300 | static SYSDEV_ATTR(state, 0644, show_mem_state, store_mem_state); | |
301 | static SYSDEV_ATTR(phys_device, 0444, show_phys_device, NULL); | |
5c755e9f | 302 | static SYSDEV_ATTR(removable, 0444, show_mem_removable, NULL); |
3947be19 DH |
303 | |
304 | #define mem_create_simple_file(mem, attr_name) \ | |
305 | sysdev_create_file(&mem->sysdev, &attr_##attr_name) | |
306 | #define mem_remove_simple_file(mem, attr_name) \ | |
307 | sysdev_remove_file(&mem->sysdev, &attr_##attr_name) | |
308 | ||
309 | /* | |
310 | * Block size attribute stuff | |
311 | */ | |
312 | static ssize_t | |
8564a6c1 AK |
313 | print_block_size(struct sysdev_class *class, struct sysdev_class_attribute *attr, |
314 | char *buf) | |
3947be19 | 315 | { |
4dc86ae1 | 316 | return sprintf(buf, "%lx\n", (unsigned long)PAGES_PER_SECTION * PAGE_SIZE); |
3947be19 DH |
317 | } |
318 | ||
8564a6c1 | 319 | static SYSDEV_CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL); |
3947be19 DH |
320 | |
321 | static int block_size_init(void) | |
322 | { | |
28ec24e2 | 323 | return sysfs_create_file(&memory_sysdev_class.kset.kobj, |
8564a6c1 | 324 | &attr_block_size_bytes.attr); |
3947be19 DH |
325 | } |
326 | ||
327 | /* | |
328 | * Some architectures will have custom drivers to do this, and | |
329 | * will not need to do it from userspace. The fake hot-add code | |
330 | * as well as ppc64 will do all of their discovery in userspace | |
331 | * and will require this interface. | |
332 | */ | |
333 | #ifdef CONFIG_ARCH_MEMORY_PROBE | |
334 | static ssize_t | |
28812fe1 AK |
335 | memory_probe_store(struct class *class, struct class_attribute *attr, |
336 | const char *buf, size_t count) | |
3947be19 DH |
337 | { |
338 | u64 phys_addr; | |
bc02af93 | 339 | int nid; |
3947be19 DH |
340 | int ret; |
341 | ||
342 | phys_addr = simple_strtoull(buf, NULL, 0); | |
343 | ||
bc02af93 YG |
344 | nid = memory_add_physaddr_to_nid(phys_addr); |
345 | ret = add_memory(nid, phys_addr, PAGES_PER_SECTION << PAGE_SHIFT); | |
3947be19 DH |
346 | |
347 | if (ret) | |
348 | count = ret; | |
349 | ||
350 | return count; | |
351 | } | |
bd796671 | 352 | static CLASS_ATTR(probe, S_IWUSR, NULL, memory_probe_store); |
3947be19 DH |
353 | |
354 | static int memory_probe_init(void) | |
355 | { | |
28ec24e2 | 356 | return sysfs_create_file(&memory_sysdev_class.kset.kobj, |
bd796671 | 357 | &class_attr_probe.attr); |
3947be19 DH |
358 | } |
359 | #else | |
28ec24e2 AM |
360 | static inline int memory_probe_init(void) |
361 | { | |
362 | return 0; | |
363 | } | |
3947be19 DH |
364 | #endif |
365 | ||
facb6011 AK |
366 | #ifdef CONFIG_MEMORY_FAILURE |
367 | /* | |
368 | * Support for offlining pages of memory | |
369 | */ | |
370 | ||
371 | /* Soft offline a page */ | |
372 | static ssize_t | |
28812fe1 AK |
373 | store_soft_offline_page(struct class *class, |
374 | struct class_attribute *attr, | |
375 | const char *buf, size_t count) | |
facb6011 AK |
376 | { |
377 | int ret; | |
378 | u64 pfn; | |
379 | if (!capable(CAP_SYS_ADMIN)) | |
380 | return -EPERM; | |
381 | if (strict_strtoull(buf, 0, &pfn) < 0) | |
382 | return -EINVAL; | |
383 | pfn >>= PAGE_SHIFT; | |
384 | if (!pfn_valid(pfn)) | |
385 | return -ENXIO; | |
386 | ret = soft_offline_page(pfn_to_page(pfn), 0); | |
387 | return ret == 0 ? count : ret; | |
388 | } | |
389 | ||
390 | /* Forcibly offline a page, including killing processes. */ | |
391 | static ssize_t | |
28812fe1 AK |
392 | store_hard_offline_page(struct class *class, |
393 | struct class_attribute *attr, | |
394 | const char *buf, size_t count) | |
facb6011 AK |
395 | { |
396 | int ret; | |
397 | u64 pfn; | |
398 | if (!capable(CAP_SYS_ADMIN)) | |
399 | return -EPERM; | |
400 | if (strict_strtoull(buf, 0, &pfn) < 0) | |
401 | return -EINVAL; | |
402 | pfn >>= PAGE_SHIFT; | |
403 | ret = __memory_failure(pfn, 0, 0); | |
404 | return ret ? ret : count; | |
405 | } | |
406 | ||
bd796671 GKH |
407 | static CLASS_ATTR(soft_offline_page, 0644, NULL, store_soft_offline_page); |
408 | static CLASS_ATTR(hard_offline_page, 0644, NULL, store_hard_offline_page); | |
facb6011 AK |
409 | |
410 | static __init int memory_fail_init(void) | |
411 | { | |
412 | int err; | |
413 | ||
414 | err = sysfs_create_file(&memory_sysdev_class.kset.kobj, | |
bd796671 | 415 | &class_attr_soft_offline_page.attr); |
facb6011 AK |
416 | if (!err) |
417 | err = sysfs_create_file(&memory_sysdev_class.kset.kobj, | |
bd796671 | 418 | &class_attr_hard_offline_page.attr); |
facb6011 AK |
419 | return err; |
420 | } | |
421 | #else | |
422 | static inline int memory_fail_init(void) | |
423 | { | |
424 | return 0; | |
425 | } | |
426 | #endif | |
427 | ||
3947be19 DH |
428 | /* |
429 | * Note that phys_device is optional. It is here to allow for | |
430 | * differentiation between which *physical* devices each | |
431 | * section belongs to... | |
432 | */ | |
bc32df00 HC |
433 | int __weak arch_get_memory_phys_device(unsigned long start_pfn) |
434 | { | |
435 | return 0; | |
436 | } | |
3947be19 | 437 | |
c04fc586 | 438 | static int add_memory_block(int nid, struct mem_section *section, |
bc32df00 | 439 | unsigned long state, enum mem_add_context context) |
3947be19 | 440 | { |
0b0acbec | 441 | struct memory_block *mem = kzalloc(sizeof(*mem), GFP_KERNEL); |
bc32df00 | 442 | unsigned long start_pfn; |
3947be19 DH |
443 | int ret = 0; |
444 | ||
445 | if (!mem) | |
446 | return -ENOMEM; | |
447 | ||
3947be19 DH |
448 | mem->phys_index = __section_nr(section); |
449 | mem->state = state; | |
da19cbcf | 450 | mutex_init(&mem->state_mutex); |
bc32df00 HC |
451 | start_pfn = section_nr_to_pfn(mem->phys_index); |
452 | mem->phys_device = arch_get_memory_phys_device(start_pfn); | |
3947be19 | 453 | |
00a41db5 | 454 | ret = register_memory(mem, section); |
3947be19 DH |
455 | if (!ret) |
456 | ret = mem_create_simple_file(mem, phys_index); | |
457 | if (!ret) | |
458 | ret = mem_create_simple_file(mem, state); | |
459 | if (!ret) | |
460 | ret = mem_create_simple_file(mem, phys_device); | |
5c755e9f BP |
461 | if (!ret) |
462 | ret = mem_create_simple_file(mem, removable); | |
c04fc586 GH |
463 | if (!ret) { |
464 | if (context == HOTPLUG) | |
465 | ret = register_mem_sect_under_node(mem, nid); | |
466 | } | |
3947be19 DH |
467 | |
468 | return ret; | |
469 | } | |
470 | ||
98383031 RH |
471 | struct memory_block *find_memory_block_hinted(struct mem_section *section, |
472 | struct memory_block *hint) | |
3947be19 DH |
473 | { |
474 | struct kobject *kobj; | |
475 | struct sys_device *sysdev; | |
476 | struct memory_block *mem; | |
477 | char name[sizeof(MEMORY_CLASS_NAME) + 9 + 1]; | |
478 | ||
98383031 RH |
479 | kobj = hint ? &hint->sysdev.kobj : NULL; |
480 | ||
3947be19 DH |
481 | /* |
482 | * This only works because we know that section == sysdev->id | |
483 | * slightly redundant with sysdev_register() | |
484 | */ | |
485 | sprintf(&name[0], "%s%d", MEMORY_CLASS_NAME, __section_nr(section)); | |
486 | ||
98383031 | 487 | kobj = kset_find_obj_hinted(&memory_sysdev_class.kset, name, kobj); |
3947be19 DH |
488 | if (!kobj) |
489 | return NULL; | |
490 | ||
491 | sysdev = container_of(kobj, struct sys_device, kobj); | |
492 | mem = container_of(sysdev, struct memory_block, sysdev); | |
493 | ||
494 | return mem; | |
495 | } | |
496 | ||
98383031 RH |
497 | /* |
498 | * For now, we have a linear search to go find the appropriate | |
499 | * memory_block corresponding to a particular phys_index. If | |
500 | * this gets to be a real problem, we can always use a radix | |
501 | * tree or something here. | |
502 | * | |
503 | * This could be made generic for all sysdev classes. | |
504 | */ | |
505 | struct memory_block *find_memory_block(struct mem_section *section) | |
506 | { | |
507 | return find_memory_block_hinted(section, NULL); | |
508 | } | |
509 | ||
3947be19 DH |
510 | int remove_memory_block(unsigned long node_id, struct mem_section *section, |
511 | int phys_device) | |
512 | { | |
513 | struct memory_block *mem; | |
514 | ||
515 | mem = find_memory_block(section); | |
c04fc586 | 516 | unregister_mem_sect_under_nodes(mem); |
3947be19 DH |
517 | mem_remove_simple_file(mem, phys_index); |
518 | mem_remove_simple_file(mem, state); | |
519 | mem_remove_simple_file(mem, phys_device); | |
5c755e9f | 520 | mem_remove_simple_file(mem, removable); |
00a41db5 | 521 | unregister_memory(mem, section); |
3947be19 DH |
522 | |
523 | return 0; | |
524 | } | |
525 | ||
526 | /* | |
527 | * need an interface for the VM to add new memory regions, | |
528 | * but without onlining it. | |
529 | */ | |
c04fc586 | 530 | int register_new_memory(int nid, struct mem_section *section) |
3947be19 | 531 | { |
bc32df00 | 532 | return add_memory_block(nid, section, MEM_OFFLINE, HOTPLUG); |
3947be19 DH |
533 | } |
534 | ||
535 | int unregister_memory_section(struct mem_section *section) | |
536 | { | |
540557b9 | 537 | if (!present_section(section)) |
3947be19 DH |
538 | return -EINVAL; |
539 | ||
540 | return remove_memory_block(0, section, 0); | |
541 | } | |
542 | ||
543 | /* | |
544 | * Initialize the sysfs support for memory devices... | |
545 | */ | |
546 | int __init memory_dev_init(void) | |
547 | { | |
548 | unsigned int i; | |
549 | int ret; | |
28ec24e2 | 550 | int err; |
3947be19 | 551 | |
312c004d | 552 | memory_sysdev_class.kset.uevent_ops = &memory_uevent_ops; |
3947be19 | 553 | ret = sysdev_class_register(&memory_sysdev_class); |
28ec24e2 AM |
554 | if (ret) |
555 | goto out; | |
3947be19 DH |
556 | |
557 | /* | |
558 | * Create entries for memory sections that were found | |
559 | * during boot and have been initialized | |
560 | */ | |
561 | for (i = 0; i < NR_MEM_SECTIONS; i++) { | |
540557b9 | 562 | if (!present_section_nr(i)) |
3947be19 | 563 | continue; |
c04fc586 | 564 | err = add_memory_block(0, __nr_to_section(i), MEM_ONLINE, |
bc32df00 | 565 | BOOT); |
28ec24e2 AM |
566 | if (!ret) |
567 | ret = err; | |
3947be19 DH |
568 | } |
569 | ||
28ec24e2 | 570 | err = memory_probe_init(); |
facb6011 AK |
571 | if (!ret) |
572 | ret = err; | |
573 | err = memory_fail_init(); | |
28ec24e2 AM |
574 | if (!ret) |
575 | ret = err; | |
576 | err = block_size_init(); | |
577 | if (!ret) | |
578 | ret = err; | |
579 | out: | |
580 | if (ret) | |
2b3a302a | 581 | printk(KERN_ERR "%s() failed: %d\n", __func__, ret); |
3947be19 DH |
582 | return ret; |
583 | } |