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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * This file contains NUMA specific variables and functions which can | |
7 | * be split away from DISCONTIGMEM and are used on NUMA machines with | |
8 | * contiguous memory. | |
9 | * 2002/08/07 Erich Focht <efocht@ess.nec.de> | |
10 | * Populate cpu entries in sysfs for non-numa systems as well | |
11 | * Intel Corporation - Ashok Raj | |
f1918005 ZY |
12 | * 02/27/2006 Zhang, Yanmin |
13 | * Populate cpu cache entries in sysfs for cpu cache info | |
1da177e4 LT |
14 | */ |
15 | ||
1da177e4 LT |
16 | #include <linux/cpu.h> |
17 | #include <linux/kernel.h> | |
18 | #include <linux/mm.h> | |
19 | #include <linux/node.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/bootmem.h> | |
22 | #include <linux/nodemask.h> | |
f1918005 | 23 | #include <linux/notifier.h> |
1da177e4 LT |
24 | #include <asm/mmzone.h> |
25 | #include <asm/numa.h> | |
26 | #include <asm/cpu.h> | |
27 | ||
1da177e4 LT |
28 | static struct ia64_cpu *sysfs_cpus; |
29 | ||
fe086a7b AC |
30 | void arch_fix_phys_package_id(int num, u32 slot) |
31 | { | |
32 | #ifdef CONFIG_SMP | |
33 | if (cpu_data(num)->socket_id == -1) | |
34 | cpu_data(num)->socket_id = slot; | |
35 | #endif | |
36 | } | |
37 | EXPORT_SYMBOL_GPL(arch_fix_phys_package_id); | |
38 | ||
6d3c5111 HS |
39 | |
40 | #ifdef CONFIG_HOTPLUG_CPU | |
41 | int __ref arch_register_cpu(int num) | |
1da177e4 | 42 | { |
6d3c5111 | 43 | #ifdef CONFIG_ACPI |
55e59c51 | 44 | /* |
72486f1f SS |
45 | * If CPEI can be re-targetted or if this is not |
46 | * CPEI target, then it is hotpluggable | |
55e59c51 | 47 | */ |
72486f1f SS |
48 | if (can_cpei_retarget() || !is_cpu_cpei_target(num)) |
49 | sysfs_cpus[num].cpu.hotpluggable = 1; | |
3212fe15 | 50 | map_cpu_to_node(num, node_cpuid[num].nid); |
46906c44 | 51 | #endif |
76b67ed9 | 52 | return register_cpu(&sysfs_cpus[num].cpu, num); |
1da177e4 | 53 | } |
6d3c5111 | 54 | EXPORT_SYMBOL(arch_register_cpu); |
1da177e4 | 55 | |
8704ad85 | 56 | void __ref arch_unregister_cpu(int num) |
1da177e4 | 57 | { |
3212fe15 | 58 | unregister_cpu(&sysfs_cpus[num].cpu); |
8704ad85 | 59 | #ifdef CONFIG_ACPI |
3212fe15 | 60 | unmap_cpu_from_node(num, cpu_to_node(num)); |
8704ad85 | 61 | #endif |
1da177e4 | 62 | } |
1da177e4 | 63 | EXPORT_SYMBOL(arch_unregister_cpu); |
6d3c5111 HS |
64 | #else |
65 | static int __init arch_register_cpu(int num) | |
66 | { | |
67 | return register_cpu(&sysfs_cpus[num].cpu, num); | |
68 | } | |
1da177e4 LT |
69 | #endif /*CONFIG_HOTPLUG_CPU*/ |
70 | ||
71 | ||
72 | static int __init topology_init(void) | |
73 | { | |
74 | int i, err = 0; | |
75 | ||
76 | #ifdef CONFIG_NUMA | |
69dcc991 ZY |
77 | /* |
78 | * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? | |
79 | */ | |
80 | for_each_online_node(i) { | |
0fc44159 | 81 | if ((err = register_one_node(i))) |
1da177e4 | 82 | goto out; |
69dcc991 | 83 | } |
1da177e4 LT |
84 | #endif |
85 | ||
69dcc991 | 86 | sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL); |
a813213d PJ |
87 | if (!sysfs_cpus) |
88 | panic("kzalloc in topology_init failed - NR_CPUS too big?"); | |
1da177e4 | 89 | |
69dcc991 | 90 | for_each_present_cpu(i) { |
1da177e4 LT |
91 | if((err = arch_register_cpu(i))) |
92 | goto out; | |
69dcc991 | 93 | } |
1da177e4 LT |
94 | out: |
95 | return err; | |
96 | } | |
97 | ||
69dcc991 | 98 | subsys_initcall(topology_init); |
f1918005 ZY |
99 | |
100 | ||
101 | /* | |
102 | * Export cpu cache information through sysfs | |
103 | */ | |
104 | ||
105 | /* | |
106 | * A bunch of string array to get pretty printing | |
107 | */ | |
108 | static const char *cache_types[] = { | |
109 | "", /* not used */ | |
110 | "Instruction", | |
111 | "Data", | |
112 | "Unified" /* unified */ | |
113 | }; | |
114 | ||
115 | static const char *cache_mattrib[]={ | |
116 | "WriteThrough", | |
117 | "WriteBack", | |
118 | "", /* reserved */ | |
119 | "" /* reserved */ | |
120 | }; | |
121 | ||
122 | struct cache_info { | |
123 | pal_cache_config_info_t cci; | |
124 | cpumask_t shared_cpu_map; | |
125 | int level; | |
126 | int type; | |
127 | struct kobject kobj; | |
128 | }; | |
129 | ||
130 | struct cpu_cache_info { | |
131 | struct cache_info *cache_leaves; | |
132 | int num_cache_leaves; | |
133 | struct kobject kobj; | |
134 | }; | |
135 | ||
db6a5cef | 136 | static struct cpu_cache_info all_cpu_cache_info[NR_CPUS] __cpuinitdata; |
f1918005 ZY |
137 | #define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) |
138 | ||
139 | #ifdef CONFIG_SMP | |
db6a5cef | 140 | static void __cpuinit cache_shared_cpu_map_setup( unsigned int cpu, |
f1918005 ZY |
141 | struct cache_info * this_leaf) |
142 | { | |
143 | pal_cache_shared_info_t csi; | |
144 | int num_shared, i = 0; | |
145 | unsigned int j; | |
146 | ||
147 | if (cpu_data(cpu)->threads_per_core <= 1 && | |
148 | cpu_data(cpu)->cores_per_socket <= 1) { | |
149 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
150 | return; | |
151 | } | |
152 | ||
153 | if (ia64_pal_cache_shared_info(this_leaf->level, | |
154 | this_leaf->type, | |
155 | 0, | |
156 | &csi) != PAL_STATUS_SUCCESS) | |
157 | return; | |
158 | ||
159 | num_shared = (int) csi.num_shared; | |
160 | do { | |
fb1bb34d | 161 | for_each_possible_cpu(j) |
f1918005 ZY |
162 | if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id |
163 | && cpu_data(j)->core_id == csi.log1_cid | |
164 | && cpu_data(j)->thread_id == csi.log1_tid) | |
165 | cpu_set(j, this_leaf->shared_cpu_map); | |
166 | ||
167 | i++; | |
168 | } while (i < num_shared && | |
169 | ia64_pal_cache_shared_info(this_leaf->level, | |
170 | this_leaf->type, | |
171 | i, | |
172 | &csi) == PAL_STATUS_SUCCESS); | |
173 | } | |
174 | #else | |
db6a5cef | 175 | static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, |
f1918005 ZY |
176 | struct cache_info * this_leaf) |
177 | { | |
178 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
179 | return; | |
180 | } | |
181 | #endif | |
182 | ||
183 | static ssize_t show_coherency_line_size(struct cache_info *this_leaf, | |
184 | char *buf) | |
185 | { | |
186 | return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); | |
187 | } | |
188 | ||
189 | static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, | |
190 | char *buf) | |
191 | { | |
192 | return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); | |
193 | } | |
194 | ||
195 | static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) | |
196 | { | |
197 | return sprintf(buf, | |
198 | "%s\n", | |
199 | cache_mattrib[this_leaf->cci.pcci_cache_attr]); | |
200 | } | |
201 | ||
202 | static ssize_t show_size(struct cache_info *this_leaf, char *buf) | |
203 | { | |
204 | return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); | |
205 | } | |
206 | ||
207 | static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) | |
208 | { | |
209 | unsigned number_of_sets = this_leaf->cci.pcci_cache_size; | |
210 | number_of_sets /= this_leaf->cci.pcci_assoc; | |
211 | number_of_sets /= 1 << this_leaf->cci.pcci_line_size; | |
212 | ||
213 | return sprintf(buf, "%u\n", number_of_sets); | |
214 | } | |
215 | ||
216 | static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) | |
217 | { | |
218 | ssize_t len; | |
219 | cpumask_t shared_cpu_map; | |
220 | ||
221 | cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map); | |
29c0177e | 222 | len = cpumask_scnprintf(buf, NR_CPUS+1, &shared_cpu_map); |
f1918005 ZY |
223 | len += sprintf(buf+len, "\n"); |
224 | return len; | |
225 | } | |
226 | ||
227 | static ssize_t show_type(struct cache_info *this_leaf, char *buf) | |
228 | { | |
229 | int type = this_leaf->type + this_leaf->cci.pcci_unified; | |
230 | return sprintf(buf, "%s\n", cache_types[type]); | |
231 | } | |
232 | ||
233 | static ssize_t show_level(struct cache_info *this_leaf, char *buf) | |
234 | { | |
235 | return sprintf(buf, "%u\n", this_leaf->level); | |
236 | } | |
237 | ||
238 | struct cache_attr { | |
239 | struct attribute attr; | |
240 | ssize_t (*show)(struct cache_info *, char *); | |
241 | ssize_t (*store)(struct cache_info *, const char *, size_t count); | |
242 | }; | |
243 | ||
244 | #ifdef define_one_ro | |
245 | #undef define_one_ro | |
246 | #endif | |
247 | #define define_one_ro(_name) \ | |
248 | static struct cache_attr _name = \ | |
249 | __ATTR(_name, 0444, show_##_name, NULL) | |
250 | ||
251 | define_one_ro(level); | |
252 | define_one_ro(type); | |
253 | define_one_ro(coherency_line_size); | |
254 | define_one_ro(ways_of_associativity); | |
255 | define_one_ro(size); | |
256 | define_one_ro(number_of_sets); | |
257 | define_one_ro(shared_cpu_map); | |
258 | define_one_ro(attributes); | |
259 | ||
260 | static struct attribute * cache_default_attrs[] = { | |
261 | &type.attr, | |
262 | &level.attr, | |
263 | &coherency_line_size.attr, | |
264 | &ways_of_associativity.attr, | |
265 | &attributes.attr, | |
266 | &size.attr, | |
267 | &number_of_sets.attr, | |
268 | &shared_cpu_map.attr, | |
269 | NULL | |
270 | }; | |
271 | ||
272 | #define to_object(k) container_of(k, struct cache_info, kobj) | |
273 | #define to_attr(a) container_of(a, struct cache_attr, attr) | |
274 | ||
275 | static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf) | |
276 | { | |
277 | struct cache_attr *fattr = to_attr(attr); | |
278 | struct cache_info *this_leaf = to_object(kobj); | |
279 | ssize_t ret; | |
280 | ||
281 | ret = fattr->show ? fattr->show(this_leaf, buf) : 0; | |
282 | return ret; | |
283 | } | |
284 | ||
52cf25d0 | 285 | static const struct sysfs_ops cache_sysfs_ops = { |
f1918005 ZY |
286 | .show = cache_show |
287 | }; | |
288 | ||
289 | static struct kobj_type cache_ktype = { | |
290 | .sysfs_ops = &cache_sysfs_ops, | |
291 | .default_attrs = cache_default_attrs, | |
292 | }; | |
293 | ||
294 | static struct kobj_type cache_ktype_percpu_entry = { | |
295 | .sysfs_ops = &cache_sysfs_ops, | |
296 | }; | |
297 | ||
298 | static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu) | |
299 | { | |
cbf283c0 JJ |
300 | kfree(all_cpu_cache_info[cpu].cache_leaves); |
301 | all_cpu_cache_info[cpu].cache_leaves = NULL; | |
f1918005 ZY |
302 | all_cpu_cache_info[cpu].num_cache_leaves = 0; |
303 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
f1918005 ZY |
304 | return; |
305 | } | |
306 | ||
307 | static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu) | |
308 | { | |
e088a4ad | 309 | unsigned long i, levels, unique_caches; |
f1918005 ZY |
310 | pal_cache_config_info_t cci; |
311 | int j; | |
e088a4ad | 312 | long status; |
f1918005 ZY |
313 | struct cache_info *this_cache; |
314 | int num_cache_leaves = 0; | |
315 | ||
316 | if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { | |
317 | printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); | |
318 | return -1; | |
319 | } | |
320 | ||
321 | this_cache=kzalloc(sizeof(struct cache_info)*unique_caches, | |
322 | GFP_KERNEL); | |
323 | if (this_cache == NULL) | |
324 | return -ENOMEM; | |
325 | ||
326 | for (i=0; i < levels; i++) { | |
327 | for (j=2; j >0 ; j--) { | |
328 | if ((status=ia64_pal_cache_config_info(i,j, &cci)) != | |
329 | PAL_STATUS_SUCCESS) | |
330 | continue; | |
331 | ||
332 | this_cache[num_cache_leaves].cci = cci; | |
333 | this_cache[num_cache_leaves].level = i + 1; | |
334 | this_cache[num_cache_leaves].type = j; | |
335 | ||
336 | cache_shared_cpu_map_setup(cpu, | |
337 | &this_cache[num_cache_leaves]); | |
338 | num_cache_leaves ++; | |
339 | } | |
340 | } | |
341 | ||
342 | all_cpu_cache_info[cpu].cache_leaves = this_cache; | |
343 | all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; | |
344 | ||
345 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
350 | /* Add cache interface for CPU device */ | |
351 | static int __cpuinit cache_add_dev(struct sys_device * sys_dev) | |
352 | { | |
353 | unsigned int cpu = sys_dev->id; | |
354 | unsigned long i, j; | |
355 | struct cache_info *this_object; | |
356 | int retval = 0; | |
357 | cpumask_t oldmask; | |
358 | ||
359 | if (all_cpu_cache_info[cpu].kobj.parent) | |
360 | return 0; | |
361 | ||
362 | oldmask = current->cpus_allowed; | |
363 | retval = set_cpus_allowed(current, cpumask_of_cpu(cpu)); | |
364 | if (unlikely(retval)) | |
365 | return retval; | |
366 | ||
367 | retval = cpu_cache_sysfs_init(cpu); | |
368 | set_cpus_allowed(current, oldmask); | |
369 | if (unlikely(retval < 0)) | |
370 | return retval; | |
371 | ||
c199790a GKH |
372 | retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj, |
373 | &cache_ktype_percpu_entry, &sys_dev->kobj, | |
374 | "%s", "cache"); | |
5359dffd FY |
375 | if (unlikely(retval < 0)) { |
376 | cpu_cache_sysfs_exit(cpu); | |
377 | return retval; | |
378 | } | |
f1918005 ZY |
379 | |
380 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { | |
381 | this_object = LEAF_KOBJECT_PTR(cpu,i); | |
c199790a GKH |
382 | retval = kobject_init_and_add(&(this_object->kobj), |
383 | &cache_ktype, | |
384 | &all_cpu_cache_info[cpu].kobj, | |
385 | "index%1lu", i); | |
f1918005 ZY |
386 | if (unlikely(retval)) { |
387 | for (j = 0; j < i; j++) { | |
38a382ae | 388 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj)); |
f1918005 | 389 | } |
38a382ae | 390 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 | 391 | cpu_cache_sysfs_exit(cpu); |
5359dffd | 392 | return retval; |
f1918005 | 393 | } |
c199790a | 394 | kobject_uevent(&(this_object->kobj), KOBJ_ADD); |
f1918005 | 395 | } |
c199790a | 396 | kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD); |
f1918005 ZY |
397 | return retval; |
398 | } | |
399 | ||
400 | /* Remove cache interface for CPU device */ | |
401 | static int __cpuinit cache_remove_dev(struct sys_device * sys_dev) | |
402 | { | |
403 | unsigned int cpu = sys_dev->id; | |
404 | unsigned long i; | |
405 | ||
406 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) | |
38a382ae | 407 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); |
f1918005 ZY |
408 | |
409 | if (all_cpu_cache_info[cpu].kobj.parent) { | |
38a382ae | 410 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 ZY |
411 | memset(&all_cpu_cache_info[cpu].kobj, |
412 | 0, | |
413 | sizeof(struct kobject)); | |
414 | } | |
415 | ||
416 | cpu_cache_sysfs_exit(cpu); | |
417 | ||
418 | return 0; | |
419 | } | |
420 | ||
421 | /* | |
422 | * When a cpu is hot-plugged, do a check and initiate | |
423 | * cache kobject if necessary | |
424 | */ | |
9c7b216d | 425 | static int __cpuinit cache_cpu_callback(struct notifier_block *nfb, |
f1918005 ZY |
426 | unsigned long action, void *hcpu) |
427 | { | |
428 | unsigned int cpu = (unsigned long)hcpu; | |
429 | struct sys_device *sys_dev; | |
430 | ||
431 | sys_dev = get_cpu_sysdev(cpu); | |
432 | switch (action) { | |
433 | case CPU_ONLINE: | |
8bb78442 | 434 | case CPU_ONLINE_FROZEN: |
f1918005 ZY |
435 | cache_add_dev(sys_dev); |
436 | break; | |
437 | case CPU_DEAD: | |
8bb78442 | 438 | case CPU_DEAD_FROZEN: |
f1918005 ZY |
439 | cache_remove_dev(sys_dev); |
440 | break; | |
441 | } | |
442 | return NOTIFY_OK; | |
443 | } | |
444 | ||
74b85f37 | 445 | static struct notifier_block __cpuinitdata cache_cpu_notifier = |
f1918005 ZY |
446 | { |
447 | .notifier_call = cache_cpu_callback | |
448 | }; | |
449 | ||
db6a5cef | 450 | static int __init cache_sysfs_init(void) |
f1918005 ZY |
451 | { |
452 | int i; | |
453 | ||
454 | for_each_online_cpu(i) { | |
db6a5cef SS |
455 | struct sys_device *sys_dev = get_cpu_sysdev((unsigned int)i); |
456 | cache_add_dev(sys_dev); | |
f1918005 ZY |
457 | } |
458 | ||
be6b5a35 | 459 | register_hotcpu_notifier(&cache_cpu_notifier); |
f1918005 ZY |
460 | |
461 | return 0; | |
462 | } | |
463 | ||
464 | device_initcall(cache_sysfs_init); | |
465 |