Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 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> |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 16 | #include <linux/topology.h> |
Randy.Dunlap | c59ede7 | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 17 | #include <linux/capability.h> |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 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> |
Daniel Walker | da19cbc | 2008-02-04 23:35:47 -0800 | [diff] [blame] | 23 | #include <linux/mutex.h> |
Shaohua Li | 9f1b16a | 2008-10-18 20:27:12 -0700 | [diff] [blame] | 24 | #include <linux/stat.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Shaohua Li | 9f1b16a | 2008-10-18 20:27:12 -0700 | [diff] [blame] | 26 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 27 | #include <asm/atomic.h> |
| 28 | #include <asm/uaccess.h> |
| 29 | |
Nathan Fontenot | 2938ffb | 2010-10-19 12:45:24 -0500 | [diff] [blame] | 30 | static DEFINE_MUTEX(mem_sysfs_mutex); |
| 31 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 32 | #define MEMORY_CLASS_NAME "memory" |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 33 | #define MIN_MEMORY_BLOCK_SIZE (1 << SECTION_SIZE_BITS) |
| 34 | |
| 35 | static int sections_per_block; |
| 36 | |
| 37 | static inline int base_memory_block_id(int section_nr) |
| 38 | { |
| 39 | return section_nr / sections_per_block; |
| 40 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 41 | |
| 42 | static struct sysdev_class memory_sysdev_class = { |
Kay Sievers | af5ca3f | 2007-12-20 02:09:39 +0100 | [diff] [blame] | 43 | .name = MEMORY_CLASS_NAME, |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 44 | }; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 45 | |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 46 | static const char *memory_uevent_name(struct kset *kset, struct kobject *kobj) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 47 | { |
| 48 | return MEMORY_CLASS_NAME; |
| 49 | } |
| 50 | |
Al Viro | 9ec0fd4 | 2007-10-14 06:53:45 +0100 | [diff] [blame] | 51 | static int memory_uevent(struct kset *kset, struct kobject *obj, struct kobj_uevent_env *env) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 52 | { |
| 53 | int retval = 0; |
| 54 | |
| 55 | return retval; |
| 56 | } |
| 57 | |
Emese Revfy | 9cd4361 | 2009-12-31 14:52:51 +0100 | [diff] [blame] | 58 | static const struct kset_uevent_ops memory_uevent_ops = { |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 59 | .name = memory_uevent_name, |
| 60 | .uevent = memory_uevent, |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 61 | }; |
| 62 | |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 63 | static BLOCKING_NOTIFIER_HEAD(memory_chain); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 64 | |
Andy Whitcroft | 98a38eb | 2006-01-06 00:10:35 -0800 | [diff] [blame] | 65 | int register_memory_notifier(struct notifier_block *nb) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 66 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 67 | return blocking_notifier_chain_register(&memory_chain, nb); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 68 | } |
Hannes Hering | 3c82c30 | 2008-05-07 14:43:01 +0200 | [diff] [blame] | 69 | EXPORT_SYMBOL(register_memory_notifier); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 70 | |
Andy Whitcroft | 98a38eb | 2006-01-06 00:10:35 -0800 | [diff] [blame] | 71 | void unregister_memory_notifier(struct notifier_block *nb) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 72 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 73 | blocking_notifier_chain_unregister(&memory_chain, nb); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 74 | } |
Hannes Hering | 3c82c30 | 2008-05-07 14:43:01 +0200 | [diff] [blame] | 75 | EXPORT_SYMBOL(unregister_memory_notifier); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 76 | |
Robert Jennings | 925cc71 | 2009-12-17 14:44:38 +0000 | [diff] [blame] | 77 | static ATOMIC_NOTIFIER_HEAD(memory_isolate_chain); |
| 78 | |
| 79 | int register_memory_isolate_notifier(struct notifier_block *nb) |
| 80 | { |
| 81 | return atomic_notifier_chain_register(&memory_isolate_chain, nb); |
| 82 | } |
| 83 | EXPORT_SYMBOL(register_memory_isolate_notifier); |
| 84 | |
| 85 | void unregister_memory_isolate_notifier(struct notifier_block *nb) |
| 86 | { |
| 87 | atomic_notifier_chain_unregister(&memory_isolate_chain, nb); |
| 88 | } |
| 89 | EXPORT_SYMBOL(unregister_memory_isolate_notifier); |
| 90 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 91 | /* |
| 92 | * register_memory - Setup a sysfs device for a memory block |
| 93 | */ |
Badari Pulavarty | 00a41db | 2008-02-11 09:23:18 -0800 | [diff] [blame] | 94 | static |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 95 | int register_memory(struct memory_block *memory) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 96 | { |
| 97 | int error; |
| 98 | |
| 99 | memory->sysdev.cls = &memory_sysdev_class; |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 100 | memory->sysdev.id = memory->start_section_nr / sections_per_block; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 101 | |
| 102 | error = sysdev_register(&memory->sysdev); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 103 | return error; |
| 104 | } |
| 105 | |
| 106 | static void |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 107 | unregister_memory(struct memory_block *memory) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 108 | { |
| 109 | BUG_ON(memory->sysdev.cls != &memory_sysdev_class); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 110 | |
Badari Pulavarty | 00a41db | 2008-02-11 09:23:18 -0800 | [diff] [blame] | 111 | /* drop the ref. we got in remove_memory_block() */ |
| 112 | kobject_put(&memory->sysdev.kobj); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 113 | sysdev_unregister(&memory->sysdev); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 114 | } |
| 115 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 116 | unsigned long __weak memory_block_size_bytes(void) |
| 117 | { |
| 118 | return MIN_MEMORY_BLOCK_SIZE; |
| 119 | } |
| 120 | |
| 121 | static unsigned long get_memory_block_size(void) |
| 122 | { |
| 123 | unsigned long block_sz; |
| 124 | |
| 125 | block_sz = memory_block_size_bytes(); |
| 126 | |
| 127 | /* Validate blk_sz is a power of 2 and not less than section size */ |
| 128 | if ((block_sz & (block_sz - 1)) || (block_sz < MIN_MEMORY_BLOCK_SIZE)) { |
| 129 | WARN_ON(1); |
| 130 | block_sz = MIN_MEMORY_BLOCK_SIZE; |
| 131 | } |
| 132 | |
| 133 | return block_sz; |
| 134 | } |
| 135 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 136 | /* |
| 137 | * use this as the physical section index that this memsection |
| 138 | * uses. |
| 139 | */ |
| 140 | |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 141 | static ssize_t show_mem_start_phys_index(struct sys_device *dev, |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 142 | struct sysdev_attribute *attr, char *buf) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 143 | { |
| 144 | struct memory_block *mem = |
| 145 | container_of(dev, struct memory_block, sysdev); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 146 | unsigned long phys_index; |
| 147 | |
| 148 | phys_index = mem->start_section_nr / sections_per_block; |
| 149 | return sprintf(buf, "%08lx\n", phys_index); |
| 150 | } |
| 151 | |
| 152 | static ssize_t show_mem_end_phys_index(struct sys_device *dev, |
| 153 | struct sysdev_attribute *attr, char *buf) |
| 154 | { |
| 155 | struct memory_block *mem = |
| 156 | container_of(dev, struct memory_block, sysdev); |
| 157 | unsigned long phys_index; |
| 158 | |
| 159 | phys_index = mem->end_section_nr / sections_per_block; |
| 160 | return sprintf(buf, "%08lx\n", phys_index); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | /* |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 164 | * Show whether the section of memory is likely to be hot-removable |
| 165 | */ |
Stephen Rothwell | 1f07be1 | 2008-07-28 11:05:04 +1000 | [diff] [blame] | 166 | static ssize_t show_mem_removable(struct sys_device *dev, |
| 167 | struct sysdev_attribute *attr, char *buf) |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 168 | { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 169 | unsigned long i, pfn; |
| 170 | int ret = 1; |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 171 | struct memory_block *mem = |
| 172 | container_of(dev, struct memory_block, sysdev); |
| 173 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 174 | for (i = 0; i < sections_per_block; i++) { |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 175 | pfn = section_nr_to_pfn(mem->start_section_nr + i); |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 176 | ret &= is_mem_section_removable(pfn, PAGES_PER_SECTION); |
| 177 | } |
| 178 | |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 179 | return sprintf(buf, "%d\n", ret); |
| 180 | } |
| 181 | |
| 182 | /* |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 183 | * online, offline, going offline, etc. |
| 184 | */ |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 185 | static ssize_t show_mem_state(struct sys_device *dev, |
| 186 | struct sysdev_attribute *attr, char *buf) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 187 | { |
| 188 | struct memory_block *mem = |
| 189 | container_of(dev, struct memory_block, sysdev); |
| 190 | ssize_t len = 0; |
| 191 | |
| 192 | /* |
| 193 | * We can probably put these states in a nice little array |
| 194 | * so that they're not open-coded |
| 195 | */ |
| 196 | switch (mem->state) { |
| 197 | case MEM_ONLINE: |
| 198 | len = sprintf(buf, "online\n"); |
| 199 | break; |
| 200 | case MEM_OFFLINE: |
| 201 | len = sprintf(buf, "offline\n"); |
| 202 | break; |
| 203 | case MEM_GOING_OFFLINE: |
| 204 | len = sprintf(buf, "going-offline\n"); |
| 205 | break; |
| 206 | default: |
| 207 | len = sprintf(buf, "ERROR-UNKNOWN-%ld\n", |
| 208 | mem->state); |
| 209 | WARN_ON(1); |
| 210 | break; |
| 211 | } |
| 212 | |
| 213 | return len; |
| 214 | } |
| 215 | |
Yasunori Goto | 7b78d33 | 2007-10-21 16:41:36 -0700 | [diff] [blame] | 216 | int memory_notify(unsigned long val, void *v) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 217 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 218 | return blocking_notifier_call_chain(&memory_chain, val, v); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 219 | } |
| 220 | |
Robert Jennings | 925cc71 | 2009-12-17 14:44:38 +0000 | [diff] [blame] | 221 | int memory_isolate_notify(unsigned long val, void *v) |
| 222 | { |
| 223 | return atomic_notifier_call_chain(&memory_isolate_chain, val, v); |
| 224 | } |
| 225 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 226 | /* |
| 227 | * MEMORY_HOTPLUG depends on SPARSEMEM in mm/Kconfig, so it is |
| 228 | * OK to have direct references to sparsemem variables in here. |
| 229 | */ |
| 230 | static int |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 231 | memory_section_action(unsigned long phys_index, unsigned long action) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 232 | { |
| 233 | int i; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 234 | unsigned long start_pfn, start_paddr; |
| 235 | struct page *first_page; |
| 236 | int ret; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 237 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 238 | first_page = pfn_to_page(phys_index << PFN_SECTION_SHIFT); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 239 | |
| 240 | /* |
| 241 | * The probe routines leave the pages reserved, just |
| 242 | * as the bootmem code does. Make sure they're still |
| 243 | * that way. |
| 244 | */ |
| 245 | if (action == MEM_ONLINE) { |
| 246 | for (i = 0; i < PAGES_PER_SECTION; i++) { |
| 247 | if (PageReserved(first_page+i)) |
| 248 | continue; |
| 249 | |
| 250 | printk(KERN_WARNING "section number %ld page number %d " |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 251 | "not reserved, was it already online?\n", |
| 252 | phys_index, i); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 253 | return -EBUSY; |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | switch (action) { |
| 258 | case MEM_ONLINE: |
| 259 | start_pfn = page_to_pfn(first_page); |
| 260 | ret = online_pages(start_pfn, PAGES_PER_SECTION); |
| 261 | break; |
| 262 | case MEM_OFFLINE: |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 263 | start_paddr = page_to_pfn(first_page) << PAGE_SHIFT; |
| 264 | ret = remove_memory(start_paddr, |
| 265 | PAGES_PER_SECTION << PAGE_SHIFT); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 266 | break; |
| 267 | default: |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 268 | WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: " |
| 269 | "%ld\n", __func__, phys_index, action, action); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 270 | ret = -EINVAL; |
| 271 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 272 | |
| 273 | return ret; |
| 274 | } |
| 275 | |
| 276 | static int memory_block_change_state(struct memory_block *mem, |
| 277 | unsigned long to_state, unsigned long from_state_req) |
| 278 | { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 279 | int i, ret = 0; |
| 280 | |
Daniel Walker | da19cbc | 2008-02-04 23:35:47 -0800 | [diff] [blame] | 281 | mutex_lock(&mem->state_mutex); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 282 | |
| 283 | if (mem->state != from_state_req) { |
| 284 | ret = -EINVAL; |
| 285 | goto out; |
| 286 | } |
| 287 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 288 | if (to_state == MEM_OFFLINE) |
| 289 | mem->state = MEM_GOING_OFFLINE; |
| 290 | |
| 291 | for (i = 0; i < sections_per_block; i++) { |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 292 | ret = memory_section_action(mem->start_section_nr + i, |
| 293 | to_state); |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 294 | if (ret) |
| 295 | break; |
| 296 | } |
| 297 | |
| 298 | if (ret) { |
| 299 | for (i = 0; i < sections_per_block; i++) |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 300 | memory_section_action(mem->start_section_nr + i, |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 301 | from_state_req); |
| 302 | |
| 303 | mem->state = from_state_req; |
| 304 | } else |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 305 | mem->state = to_state; |
| 306 | |
| 307 | out: |
Daniel Walker | da19cbc | 2008-02-04 23:35:47 -0800 | [diff] [blame] | 308 | mutex_unlock(&mem->state_mutex); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 309 | return ret; |
| 310 | } |
| 311 | |
| 312 | static ssize_t |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 313 | store_mem_state(struct sys_device *dev, |
| 314 | struct sysdev_attribute *attr, const char *buf, size_t count) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 315 | { |
| 316 | struct memory_block *mem; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 317 | int ret = -EINVAL; |
| 318 | |
| 319 | mem = container_of(dev, struct memory_block, sysdev); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 320 | |
| 321 | if (!strncmp(buf, "online", min((int)count, 6))) |
| 322 | ret = memory_block_change_state(mem, MEM_ONLINE, MEM_OFFLINE); |
| 323 | else if(!strncmp(buf, "offline", min((int)count, 7))) |
| 324 | ret = memory_block_change_state(mem, MEM_OFFLINE, MEM_ONLINE); |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 325 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 326 | if (ret) |
| 327 | return ret; |
| 328 | return count; |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * phys_device is a bad name for this. What I really want |
| 333 | * is a way to differentiate between memory ranges that |
| 334 | * are part of physical devices that constitute |
| 335 | * a complete removable unit or fru. |
| 336 | * i.e. do these ranges belong to the same physical device, |
| 337 | * s.t. if I offline all of these sections I can then |
| 338 | * remove the physical device? |
| 339 | */ |
Andi Kleen | 4a0b2b4 | 2008-07-01 18:48:41 +0200 | [diff] [blame] | 340 | static ssize_t show_phys_device(struct sys_device *dev, |
| 341 | struct sysdev_attribute *attr, char *buf) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 342 | { |
| 343 | struct memory_block *mem = |
| 344 | container_of(dev, struct memory_block, sysdev); |
| 345 | return sprintf(buf, "%d\n", mem->phys_device); |
| 346 | } |
| 347 | |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 348 | static SYSDEV_ATTR(phys_index, 0444, show_mem_start_phys_index, NULL); |
| 349 | static SYSDEV_ATTR(end_phys_index, 0444, show_mem_end_phys_index, NULL); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 350 | static SYSDEV_ATTR(state, 0644, show_mem_state, store_mem_state); |
| 351 | static SYSDEV_ATTR(phys_device, 0444, show_phys_device, NULL); |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 352 | static SYSDEV_ATTR(removable, 0444, show_mem_removable, NULL); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 353 | |
| 354 | #define mem_create_simple_file(mem, attr_name) \ |
| 355 | sysdev_create_file(&mem->sysdev, &attr_##attr_name) |
| 356 | #define mem_remove_simple_file(mem, attr_name) \ |
| 357 | sysdev_remove_file(&mem->sysdev, &attr_##attr_name) |
| 358 | |
| 359 | /* |
| 360 | * Block size attribute stuff |
| 361 | */ |
| 362 | static ssize_t |
Andi Kleen | 8564a6c | 2010-01-05 12:48:06 +0100 | [diff] [blame] | 363 | print_block_size(struct sysdev_class *class, struct sysdev_class_attribute *attr, |
| 364 | char *buf) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 365 | { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 366 | return sprintf(buf, "%lx\n", get_memory_block_size()); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Andi Kleen | 8564a6c | 2010-01-05 12:48:06 +0100 | [diff] [blame] | 369 | static SYSDEV_CLASS_ATTR(block_size_bytes, 0444, print_block_size, NULL); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 370 | |
| 371 | static int block_size_init(void) |
| 372 | { |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 373 | return sysfs_create_file(&memory_sysdev_class.kset.kobj, |
Andi Kleen | 8564a6c | 2010-01-05 12:48:06 +0100 | [diff] [blame] | 374 | &attr_block_size_bytes.attr); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Some architectures will have custom drivers to do this, and |
| 379 | * will not need to do it from userspace. The fake hot-add code |
| 380 | * as well as ppc64 will do all of their discovery in userspace |
| 381 | * and will require this interface. |
| 382 | */ |
| 383 | #ifdef CONFIG_ARCH_MEMORY_PROBE |
| 384 | static ssize_t |
Andi Kleen | 28812fe | 2010-01-05 12:48:07 +0100 | [diff] [blame] | 385 | memory_probe_store(struct class *class, struct class_attribute *attr, |
| 386 | const char *buf, size_t count) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 387 | { |
| 388 | u64 phys_addr; |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 389 | int nid; |
Nathan Fontenot | 6add7cd | 2011-01-31 10:55:23 -0600 | [diff] [blame^] | 390 | int i, ret; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 391 | |
| 392 | phys_addr = simple_strtoull(buf, NULL, 0); |
| 393 | |
Nathan Fontenot | 6add7cd | 2011-01-31 10:55:23 -0600 | [diff] [blame^] | 394 | for (i = 0; i < sections_per_block; i++) { |
| 395 | nid = memory_add_physaddr_to_nid(phys_addr); |
| 396 | ret = add_memory(nid, phys_addr, |
| 397 | PAGES_PER_SECTION << PAGE_SHIFT); |
| 398 | if (ret) |
| 399 | break; |
| 400 | |
| 401 | phys_addr += MIN_MEMORY_BLOCK_SIZE; |
| 402 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 403 | |
| 404 | if (ret) |
| 405 | count = ret; |
| 406 | |
| 407 | return count; |
| 408 | } |
Greg Kroah-Hartman | bd79667 | 2010-01-19 13:08:16 -0800 | [diff] [blame] | 409 | static CLASS_ATTR(probe, S_IWUSR, NULL, memory_probe_store); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 410 | |
| 411 | static int memory_probe_init(void) |
| 412 | { |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 413 | return sysfs_create_file(&memory_sysdev_class.kset.kobj, |
Greg Kroah-Hartman | bd79667 | 2010-01-19 13:08:16 -0800 | [diff] [blame] | 414 | &class_attr_probe.attr); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 415 | } |
| 416 | #else |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 417 | static inline int memory_probe_init(void) |
| 418 | { |
| 419 | return 0; |
| 420 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 421 | #endif |
| 422 | |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 423 | #ifdef CONFIG_MEMORY_FAILURE |
| 424 | /* |
| 425 | * Support for offlining pages of memory |
| 426 | */ |
| 427 | |
| 428 | /* Soft offline a page */ |
| 429 | static ssize_t |
Andi Kleen | 28812fe | 2010-01-05 12:48:07 +0100 | [diff] [blame] | 430 | store_soft_offline_page(struct class *class, |
| 431 | struct class_attribute *attr, |
| 432 | const char *buf, size_t count) |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 433 | { |
| 434 | int ret; |
| 435 | u64 pfn; |
| 436 | if (!capable(CAP_SYS_ADMIN)) |
| 437 | return -EPERM; |
| 438 | if (strict_strtoull(buf, 0, &pfn) < 0) |
| 439 | return -EINVAL; |
| 440 | pfn >>= PAGE_SHIFT; |
| 441 | if (!pfn_valid(pfn)) |
| 442 | return -ENXIO; |
| 443 | ret = soft_offline_page(pfn_to_page(pfn), 0); |
| 444 | return ret == 0 ? count : ret; |
| 445 | } |
| 446 | |
| 447 | /* Forcibly offline a page, including killing processes. */ |
| 448 | static ssize_t |
Andi Kleen | 28812fe | 2010-01-05 12:48:07 +0100 | [diff] [blame] | 449 | store_hard_offline_page(struct class *class, |
| 450 | struct class_attribute *attr, |
| 451 | const char *buf, size_t count) |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 452 | { |
| 453 | int ret; |
| 454 | u64 pfn; |
| 455 | if (!capable(CAP_SYS_ADMIN)) |
| 456 | return -EPERM; |
| 457 | if (strict_strtoull(buf, 0, &pfn) < 0) |
| 458 | return -EINVAL; |
| 459 | pfn >>= PAGE_SHIFT; |
| 460 | ret = __memory_failure(pfn, 0, 0); |
| 461 | return ret ? ret : count; |
| 462 | } |
| 463 | |
Greg Kroah-Hartman | bd79667 | 2010-01-19 13:08:16 -0800 | [diff] [blame] | 464 | static CLASS_ATTR(soft_offline_page, 0644, NULL, store_soft_offline_page); |
| 465 | static CLASS_ATTR(hard_offline_page, 0644, NULL, store_hard_offline_page); |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 466 | |
| 467 | static __init int memory_fail_init(void) |
| 468 | { |
| 469 | int err; |
| 470 | |
| 471 | err = sysfs_create_file(&memory_sysdev_class.kset.kobj, |
Greg Kroah-Hartman | bd79667 | 2010-01-19 13:08:16 -0800 | [diff] [blame] | 472 | &class_attr_soft_offline_page.attr); |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 473 | if (!err) |
| 474 | err = sysfs_create_file(&memory_sysdev_class.kset.kobj, |
Greg Kroah-Hartman | bd79667 | 2010-01-19 13:08:16 -0800 | [diff] [blame] | 475 | &class_attr_hard_offline_page.attr); |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 476 | return err; |
| 477 | } |
| 478 | #else |
| 479 | static inline int memory_fail_init(void) |
| 480 | { |
| 481 | return 0; |
| 482 | } |
| 483 | #endif |
| 484 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 485 | /* |
| 486 | * Note that phys_device is optional. It is here to allow for |
| 487 | * differentiation between which *physical* devices each |
| 488 | * section belongs to... |
| 489 | */ |
Heiko Carstens | bc32df0 | 2010-03-15 00:35:03 -0400 | [diff] [blame] | 490 | int __weak arch_get_memory_phys_device(unsigned long start_pfn) |
| 491 | { |
| 492 | return 0; |
| 493 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 494 | |
Robin Holt | 9838303 | 2010-09-29 14:00:55 -0500 | [diff] [blame] | 495 | struct memory_block *find_memory_block_hinted(struct mem_section *section, |
| 496 | struct memory_block *hint) |
| 497 | { |
| 498 | struct kobject *kobj; |
| 499 | struct sys_device *sysdev; |
| 500 | struct memory_block *mem; |
| 501 | char name[sizeof(MEMORY_CLASS_NAME) + 9 + 1]; |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 502 | int block_id = base_memory_block_id(__section_nr(section)); |
Robin Holt | 9838303 | 2010-09-29 14:00:55 -0500 | [diff] [blame] | 503 | |
| 504 | kobj = hint ? &hint->sysdev.kobj : NULL; |
| 505 | |
| 506 | /* |
| 507 | * This only works because we know that section == sysdev->id |
| 508 | * slightly redundant with sysdev_register() |
| 509 | */ |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 510 | sprintf(&name[0], "%s%d", MEMORY_CLASS_NAME, block_id); |
Robin Holt | 9838303 | 2010-09-29 14:00:55 -0500 | [diff] [blame] | 511 | |
| 512 | kobj = kset_find_obj_hinted(&memory_sysdev_class.kset, name, kobj); |
| 513 | if (!kobj) |
| 514 | return NULL; |
| 515 | |
| 516 | sysdev = container_of(kobj, struct sys_device, kobj); |
| 517 | mem = container_of(sysdev, struct memory_block, sysdev); |
| 518 | |
| 519 | return mem; |
| 520 | } |
| 521 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 522 | /* |
| 523 | * For now, we have a linear search to go find the appropriate |
| 524 | * memory_block corresponding to a particular phys_index. If |
| 525 | * this gets to be a real problem, we can always use a radix |
| 526 | * tree or something here. |
| 527 | * |
| 528 | * This could be made generic for all sysdev classes. |
| 529 | */ |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 530 | struct memory_block *find_memory_block(struct mem_section *section) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 531 | { |
Robin Holt | 9838303 | 2010-09-29 14:00:55 -0500 | [diff] [blame] | 532 | return find_memory_block_hinted(section, NULL); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 533 | } |
| 534 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 535 | static int init_memory_block(struct memory_block **memory, |
| 536 | struct mem_section *section, unsigned long state) |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 537 | { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 538 | struct memory_block *mem; |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 539 | unsigned long start_pfn; |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 540 | int scn_nr; |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 541 | int ret = 0; |
| 542 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 543 | mem = kzalloc(sizeof(*mem), GFP_KERNEL); |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 544 | if (!mem) |
| 545 | return -ENOMEM; |
| 546 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 547 | scn_nr = __section_nr(section); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 548 | mem->start_section_nr = |
| 549 | base_memory_block_id(scn_nr) * sections_per_block; |
| 550 | mem->end_section_nr = mem->start_section_nr + sections_per_block - 1; |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 551 | mem->state = state; |
Nathan Fontenot | 0768121 | 2010-10-19 12:46:19 -0500 | [diff] [blame] | 552 | mem->section_count++; |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 553 | mutex_init(&mem->state_mutex); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 554 | start_pfn = section_nr_to_pfn(mem->start_section_nr); |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 555 | mem->phys_device = arch_get_memory_phys_device(start_pfn); |
| 556 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 557 | ret = register_memory(mem); |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 558 | if (!ret) |
| 559 | ret = mem_create_simple_file(mem, phys_index); |
| 560 | if (!ret) |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 561 | ret = mem_create_simple_file(mem, end_phys_index); |
| 562 | if (!ret) |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 563 | ret = mem_create_simple_file(mem, state); |
| 564 | if (!ret) |
| 565 | ret = mem_create_simple_file(mem, phys_device); |
| 566 | if (!ret) |
| 567 | ret = mem_create_simple_file(mem, removable); |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 568 | |
| 569 | *memory = mem; |
| 570 | return ret; |
| 571 | } |
| 572 | |
| 573 | static int add_memory_section(int nid, struct mem_section *section, |
| 574 | unsigned long state, enum mem_add_context context) |
| 575 | { |
| 576 | struct memory_block *mem; |
| 577 | int ret = 0; |
| 578 | |
| 579 | mutex_lock(&mem_sysfs_mutex); |
| 580 | |
| 581 | mem = find_memory_block(section); |
| 582 | if (mem) { |
| 583 | mem->section_count++; |
| 584 | kobject_put(&mem->sysdev.kobj); |
| 585 | } else |
| 586 | ret = init_memory_block(&mem, section, state); |
| 587 | |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 588 | if (!ret) { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 589 | if (context == HOTPLUG && |
| 590 | mem->section_count == sections_per_block) |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 591 | ret = register_mem_sect_under_node(mem, nid); |
| 592 | } |
| 593 | |
Nathan Fontenot | 2938ffb | 2010-10-19 12:45:24 -0500 | [diff] [blame] | 594 | mutex_unlock(&mem_sysfs_mutex); |
Nathan Fontenot | e4619c8 | 2010-10-19 12:44:20 -0500 | [diff] [blame] | 595 | return ret; |
| 596 | } |
| 597 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 598 | int remove_memory_block(unsigned long node_id, struct mem_section *section, |
| 599 | int phys_device) |
| 600 | { |
| 601 | struct memory_block *mem; |
| 602 | |
Nathan Fontenot | 2938ffb | 2010-10-19 12:45:24 -0500 | [diff] [blame] | 603 | mutex_lock(&mem_sysfs_mutex); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 604 | mem = find_memory_block(section); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 605 | unregister_mem_sect_under_nodes(mem, __section_nr(section)); |
Nathan Fontenot | 0768121 | 2010-10-19 12:46:19 -0500 | [diff] [blame] | 606 | |
| 607 | mem->section_count--; |
| 608 | if (mem->section_count == 0) { |
Nathan Fontenot | 0768121 | 2010-10-19 12:46:19 -0500 | [diff] [blame] | 609 | mem_remove_simple_file(mem, phys_index); |
Nathan Fontenot | d336016 | 2011-01-20 10:44:29 -0600 | [diff] [blame] | 610 | mem_remove_simple_file(mem, end_phys_index); |
Nathan Fontenot | 0768121 | 2010-10-19 12:46:19 -0500 | [diff] [blame] | 611 | mem_remove_simple_file(mem, state); |
| 612 | mem_remove_simple_file(mem, phys_device); |
| 613 | mem_remove_simple_file(mem, removable); |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 614 | unregister_memory(mem); |
| 615 | kfree(mem); |
| 616 | } else |
| 617 | kobject_put(&mem->sysdev.kobj); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 618 | |
Nathan Fontenot | 2938ffb | 2010-10-19 12:45:24 -0500 | [diff] [blame] | 619 | mutex_unlock(&mem_sysfs_mutex); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | /* |
| 624 | * need an interface for the VM to add new memory regions, |
| 625 | * but without onlining it. |
| 626 | */ |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 627 | int register_new_memory(int nid, struct mem_section *section) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 628 | { |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 629 | return add_memory_section(nid, section, MEM_OFFLINE, HOTPLUG); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | int unregister_memory_section(struct mem_section *section) |
| 633 | { |
Andy Whitcroft | 540557b | 2007-10-16 01:24:11 -0700 | [diff] [blame] | 634 | if (!present_section(section)) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 635 | return -EINVAL; |
| 636 | |
| 637 | return remove_memory_block(0, section, 0); |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * Initialize the sysfs support for memory devices... |
| 642 | */ |
| 643 | int __init memory_dev_init(void) |
| 644 | { |
| 645 | unsigned int i; |
| 646 | int ret; |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 647 | int err; |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 648 | unsigned long block_sz; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 649 | |
Kay Sievers | 312c004 | 2005-11-16 09:00:00 +0100 | [diff] [blame] | 650 | memory_sysdev_class.kset.uevent_ops = &memory_uevent_ops; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 651 | ret = sysdev_class_register(&memory_sysdev_class); |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 652 | if (ret) |
| 653 | goto out; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 654 | |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 655 | block_sz = get_memory_block_size(); |
| 656 | sections_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE; |
| 657 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 658 | /* |
| 659 | * Create entries for memory sections that were found |
| 660 | * during boot and have been initialized |
| 661 | */ |
| 662 | for (i = 0; i < NR_MEM_SECTIONS; i++) { |
Andy Whitcroft | 540557b | 2007-10-16 01:24:11 -0700 | [diff] [blame] | 663 | if (!present_section_nr(i)) |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 664 | continue; |
Nathan Fontenot | 0c2c99b | 2011-01-20 10:43:34 -0600 | [diff] [blame] | 665 | err = add_memory_section(0, __nr_to_section(i), MEM_ONLINE, |
| 666 | BOOT); |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 667 | if (!ret) |
| 668 | ret = err; |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 669 | } |
| 670 | |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 671 | err = memory_probe_init(); |
| 672 | if (!ret) |
| 673 | ret = err; |
Andi Kleen | facb601 | 2009-12-16 12:20:00 +0100 | [diff] [blame] | 674 | err = memory_fail_init(); |
| 675 | if (!ret) |
| 676 | ret = err; |
Andrew Morton | 28ec24e | 2006-12-06 20:37:29 -0800 | [diff] [blame] | 677 | err = block_size_init(); |
| 678 | if (!ret) |
| 679 | ret = err; |
| 680 | out: |
| 681 | if (ret) |
Harvey Harrison | 2b3a302 | 2008-03-04 16:41:05 -0800 | [diff] [blame] | 682 | printk(KERN_ERR "%s() failed: %d\n", __func__, ret); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 683 | return ret; |
| 684 | } |