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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> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
1da177e4 LT |
21 | #include <linux/init.h> |
22 | #include <linux/bootmem.h> | |
23 | #include <linux/nodemask.h> | |
f1918005 | 24 | #include <linux/notifier.h> |
1da177e4 LT |
25 | #include <asm/mmzone.h> |
26 | #include <asm/numa.h> | |
27 | #include <asm/cpu.h> | |
28 | ||
1da177e4 LT |
29 | static struct ia64_cpu *sysfs_cpus; |
30 | ||
fe086a7b AC |
31 | void arch_fix_phys_package_id(int num, u32 slot) |
32 | { | |
33 | #ifdef CONFIG_SMP | |
34 | if (cpu_data(num)->socket_id == -1) | |
35 | cpu_data(num)->socket_id = slot; | |
36 | #endif | |
37 | } | |
38 | EXPORT_SYMBOL_GPL(arch_fix_phys_package_id); | |
39 | ||
6d3c5111 HS |
40 | |
41 | #ifdef CONFIG_HOTPLUG_CPU | |
42 | int __ref arch_register_cpu(int num) | |
1da177e4 | 43 | { |
6d3c5111 | 44 | #ifdef CONFIG_ACPI |
55e59c51 | 45 | /* |
25985edc | 46 | * If CPEI can be re-targeted or if this is not |
72486f1f | 47 | * CPEI target, then it is hotpluggable |
55e59c51 | 48 | */ |
72486f1f SS |
49 | if (can_cpei_retarget() || !is_cpu_cpei_target(num)) |
50 | sysfs_cpus[num].cpu.hotpluggable = 1; | |
3212fe15 | 51 | map_cpu_to_node(num, node_cpuid[num].nid); |
46906c44 | 52 | #endif |
76b67ed9 | 53 | return register_cpu(&sysfs_cpus[num].cpu, num); |
1da177e4 | 54 | } |
6d3c5111 | 55 | EXPORT_SYMBOL(arch_register_cpu); |
1da177e4 | 56 | |
8704ad85 | 57 | void __ref arch_unregister_cpu(int num) |
1da177e4 | 58 | { |
3212fe15 | 59 | unregister_cpu(&sysfs_cpus[num].cpu); |
8704ad85 | 60 | #ifdef CONFIG_ACPI |
3212fe15 | 61 | unmap_cpu_from_node(num, cpu_to_node(num)); |
8704ad85 | 62 | #endif |
1da177e4 | 63 | } |
1da177e4 | 64 | EXPORT_SYMBOL(arch_unregister_cpu); |
6d3c5111 HS |
65 | #else |
66 | static int __init arch_register_cpu(int num) | |
67 | { | |
68 | return register_cpu(&sysfs_cpus[num].cpu, num); | |
69 | } | |
1da177e4 LT |
70 | #endif /*CONFIG_HOTPLUG_CPU*/ |
71 | ||
72 | ||
73 | static int __init topology_init(void) | |
74 | { | |
75 | int i, err = 0; | |
76 | ||
77 | #ifdef CONFIG_NUMA | |
69dcc991 ZY |
78 | /* |
79 | * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? | |
80 | */ | |
81 | for_each_online_node(i) { | |
0fc44159 | 82 | if ((err = register_one_node(i))) |
1da177e4 | 83 | goto out; |
69dcc991 | 84 | } |
1da177e4 LT |
85 | #endif |
86 | ||
69dcc991 | 87 | sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL); |
a813213d PJ |
88 | if (!sysfs_cpus) |
89 | panic("kzalloc in topology_init failed - NR_CPUS too big?"); | |
1da177e4 | 90 | |
69dcc991 | 91 | for_each_present_cpu(i) { |
1da177e4 LT |
92 | if((err = arch_register_cpu(i))) |
93 | goto out; | |
69dcc991 | 94 | } |
1da177e4 LT |
95 | out: |
96 | return err; | |
97 | } | |
98 | ||
69dcc991 | 99 | subsys_initcall(topology_init); |
f1918005 ZY |
100 | |
101 | ||
102 | /* | |
103 | * Export cpu cache information through sysfs | |
104 | */ | |
105 | ||
106 | /* | |
107 | * A bunch of string array to get pretty printing | |
108 | */ | |
109 | static const char *cache_types[] = { | |
110 | "", /* not used */ | |
111 | "Instruction", | |
112 | "Data", | |
113 | "Unified" /* unified */ | |
114 | }; | |
115 | ||
116 | static const char *cache_mattrib[]={ | |
117 | "WriteThrough", | |
118 | "WriteBack", | |
119 | "", /* reserved */ | |
120 | "" /* reserved */ | |
121 | }; | |
122 | ||
123 | struct cache_info { | |
124 | pal_cache_config_info_t cci; | |
125 | cpumask_t shared_cpu_map; | |
126 | int level; | |
127 | int type; | |
128 | struct kobject kobj; | |
129 | }; | |
130 | ||
131 | struct cpu_cache_info { | |
132 | struct cache_info *cache_leaves; | |
133 | int num_cache_leaves; | |
134 | struct kobject kobj; | |
135 | }; | |
136 | ||
db6a5cef | 137 | static struct cpu_cache_info all_cpu_cache_info[NR_CPUS] __cpuinitdata; |
f1918005 ZY |
138 | #define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) |
139 | ||
140 | #ifdef CONFIG_SMP | |
db6a5cef | 141 | static void __cpuinit cache_shared_cpu_map_setup( unsigned int cpu, |
f1918005 ZY |
142 | struct cache_info * this_leaf) |
143 | { | |
144 | pal_cache_shared_info_t csi; | |
145 | int num_shared, i = 0; | |
146 | unsigned int j; | |
147 | ||
148 | if (cpu_data(cpu)->threads_per_core <= 1 && | |
149 | cpu_data(cpu)->cores_per_socket <= 1) { | |
150 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
151 | return; | |
152 | } | |
153 | ||
154 | if (ia64_pal_cache_shared_info(this_leaf->level, | |
155 | this_leaf->type, | |
156 | 0, | |
157 | &csi) != PAL_STATUS_SUCCESS) | |
158 | return; | |
159 | ||
160 | num_shared = (int) csi.num_shared; | |
161 | do { | |
fb1bb34d | 162 | for_each_possible_cpu(j) |
f1918005 ZY |
163 | if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id |
164 | && cpu_data(j)->core_id == csi.log1_cid | |
165 | && cpu_data(j)->thread_id == csi.log1_tid) | |
166 | cpu_set(j, this_leaf->shared_cpu_map); | |
167 | ||
168 | i++; | |
169 | } while (i < num_shared && | |
170 | ia64_pal_cache_shared_info(this_leaf->level, | |
171 | this_leaf->type, | |
172 | i, | |
173 | &csi) == PAL_STATUS_SUCCESS); | |
174 | } | |
175 | #else | |
db6a5cef | 176 | static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, |
f1918005 ZY |
177 | struct cache_info * this_leaf) |
178 | { | |
179 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
180 | return; | |
181 | } | |
182 | #endif | |
183 | ||
184 | static ssize_t show_coherency_line_size(struct cache_info *this_leaf, | |
185 | char *buf) | |
186 | { | |
187 | return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); | |
188 | } | |
189 | ||
190 | static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, | |
191 | char *buf) | |
192 | { | |
193 | return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); | |
194 | } | |
195 | ||
196 | static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) | |
197 | { | |
198 | return sprintf(buf, | |
199 | "%s\n", | |
200 | cache_mattrib[this_leaf->cci.pcci_cache_attr]); | |
201 | } | |
202 | ||
203 | static ssize_t show_size(struct cache_info *this_leaf, char *buf) | |
204 | { | |
205 | return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); | |
206 | } | |
207 | ||
208 | static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) | |
209 | { | |
210 | unsigned number_of_sets = this_leaf->cci.pcci_cache_size; | |
211 | number_of_sets /= this_leaf->cci.pcci_assoc; | |
212 | number_of_sets /= 1 << this_leaf->cci.pcci_line_size; | |
213 | ||
214 | return sprintf(buf, "%u\n", number_of_sets); | |
215 | } | |
216 | ||
217 | static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) | |
218 | { | |
219 | ssize_t len; | |
220 | cpumask_t shared_cpu_map; | |
221 | ||
222 | cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map); | |
29c0177e | 223 | len = cpumask_scnprintf(buf, NR_CPUS+1, &shared_cpu_map); |
f1918005 ZY |
224 | len += sprintf(buf+len, "\n"); |
225 | return len; | |
226 | } | |
227 | ||
228 | static ssize_t show_type(struct cache_info *this_leaf, char *buf) | |
229 | { | |
230 | int type = this_leaf->type + this_leaf->cci.pcci_unified; | |
231 | return sprintf(buf, "%s\n", cache_types[type]); | |
232 | } | |
233 | ||
234 | static ssize_t show_level(struct cache_info *this_leaf, char *buf) | |
235 | { | |
236 | return sprintf(buf, "%u\n", this_leaf->level); | |
237 | } | |
238 | ||
239 | struct cache_attr { | |
240 | struct attribute attr; | |
241 | ssize_t (*show)(struct cache_info *, char *); | |
242 | ssize_t (*store)(struct cache_info *, const char *, size_t count); | |
243 | }; | |
244 | ||
245 | #ifdef define_one_ro | |
246 | #undef define_one_ro | |
247 | #endif | |
248 | #define define_one_ro(_name) \ | |
249 | static struct cache_attr _name = \ | |
250 | __ATTR(_name, 0444, show_##_name, NULL) | |
251 | ||
252 | define_one_ro(level); | |
253 | define_one_ro(type); | |
254 | define_one_ro(coherency_line_size); | |
255 | define_one_ro(ways_of_associativity); | |
256 | define_one_ro(size); | |
257 | define_one_ro(number_of_sets); | |
258 | define_one_ro(shared_cpu_map); | |
259 | define_one_ro(attributes); | |
260 | ||
261 | static struct attribute * cache_default_attrs[] = { | |
262 | &type.attr, | |
263 | &level.attr, | |
264 | &coherency_line_size.attr, | |
265 | &ways_of_associativity.attr, | |
266 | &attributes.attr, | |
267 | &size.attr, | |
268 | &number_of_sets.attr, | |
269 | &shared_cpu_map.attr, | |
270 | NULL | |
271 | }; | |
272 | ||
273 | #define to_object(k) container_of(k, struct cache_info, kobj) | |
274 | #define to_attr(a) container_of(a, struct cache_attr, attr) | |
275 | ||
276 | static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf) | |
277 | { | |
278 | struct cache_attr *fattr = to_attr(attr); | |
279 | struct cache_info *this_leaf = to_object(kobj); | |
280 | ssize_t ret; | |
281 | ||
282 | ret = fattr->show ? fattr->show(this_leaf, buf) : 0; | |
283 | return ret; | |
284 | } | |
285 | ||
52cf25d0 | 286 | static const struct sysfs_ops cache_sysfs_ops = { |
f1918005 ZY |
287 | .show = cache_show |
288 | }; | |
289 | ||
290 | static struct kobj_type cache_ktype = { | |
291 | .sysfs_ops = &cache_sysfs_ops, | |
292 | .default_attrs = cache_default_attrs, | |
293 | }; | |
294 | ||
295 | static struct kobj_type cache_ktype_percpu_entry = { | |
296 | .sysfs_ops = &cache_sysfs_ops, | |
297 | }; | |
298 | ||
299 | static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu) | |
300 | { | |
cbf283c0 JJ |
301 | kfree(all_cpu_cache_info[cpu].cache_leaves); |
302 | all_cpu_cache_info[cpu].cache_leaves = NULL; | |
f1918005 ZY |
303 | all_cpu_cache_info[cpu].num_cache_leaves = 0; |
304 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
f1918005 ZY |
305 | return; |
306 | } | |
307 | ||
308 | static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu) | |
309 | { | |
e088a4ad | 310 | unsigned long i, levels, unique_caches; |
f1918005 ZY |
311 | pal_cache_config_info_t cci; |
312 | int j; | |
e088a4ad | 313 | long status; |
f1918005 ZY |
314 | struct cache_info *this_cache; |
315 | int num_cache_leaves = 0; | |
316 | ||
317 | if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { | |
318 | printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); | |
319 | return -1; | |
320 | } | |
321 | ||
322 | this_cache=kzalloc(sizeof(struct cache_info)*unique_caches, | |
323 | GFP_KERNEL); | |
324 | if (this_cache == NULL) | |
325 | return -ENOMEM; | |
326 | ||
327 | for (i=0; i < levels; i++) { | |
328 | for (j=2; j >0 ; j--) { | |
329 | if ((status=ia64_pal_cache_config_info(i,j, &cci)) != | |
330 | PAL_STATUS_SUCCESS) | |
331 | continue; | |
332 | ||
333 | this_cache[num_cache_leaves].cci = cci; | |
334 | this_cache[num_cache_leaves].level = i + 1; | |
335 | this_cache[num_cache_leaves].type = j; | |
336 | ||
337 | cache_shared_cpu_map_setup(cpu, | |
338 | &this_cache[num_cache_leaves]); | |
339 | num_cache_leaves ++; | |
340 | } | |
341 | } | |
342 | ||
343 | all_cpu_cache_info[cpu].cache_leaves = this_cache; | |
344 | all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; | |
345 | ||
346 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | /* Add cache interface for CPU device */ | |
352 | static int __cpuinit cache_add_dev(struct sys_device * sys_dev) | |
353 | { | |
354 | unsigned int cpu = sys_dev->id; | |
355 | unsigned long i, j; | |
356 | struct cache_info *this_object; | |
357 | int retval = 0; | |
358 | cpumask_t oldmask; | |
359 | ||
360 | if (all_cpu_cache_info[cpu].kobj.parent) | |
361 | return 0; | |
362 | ||
363 | oldmask = current->cpus_allowed; | |
552dce3a | 364 | retval = set_cpus_allowed_ptr(current, cpumask_of(cpu)); |
f1918005 ZY |
365 | if (unlikely(retval)) |
366 | return retval; | |
367 | ||
368 | retval = cpu_cache_sysfs_init(cpu); | |
552dce3a | 369 | set_cpus_allowed_ptr(current, &oldmask); |
f1918005 ZY |
370 | if (unlikely(retval < 0)) |
371 | return retval; | |
372 | ||
c199790a GKH |
373 | retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj, |
374 | &cache_ktype_percpu_entry, &sys_dev->kobj, | |
375 | "%s", "cache"); | |
5359dffd FY |
376 | if (unlikely(retval < 0)) { |
377 | cpu_cache_sysfs_exit(cpu); | |
378 | return retval; | |
379 | } | |
f1918005 ZY |
380 | |
381 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { | |
382 | this_object = LEAF_KOBJECT_PTR(cpu,i); | |
c199790a GKH |
383 | retval = kobject_init_and_add(&(this_object->kobj), |
384 | &cache_ktype, | |
385 | &all_cpu_cache_info[cpu].kobj, | |
386 | "index%1lu", i); | |
f1918005 ZY |
387 | if (unlikely(retval)) { |
388 | for (j = 0; j < i; j++) { | |
38a382ae | 389 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj)); |
f1918005 | 390 | } |
38a382ae | 391 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 | 392 | cpu_cache_sysfs_exit(cpu); |
5359dffd | 393 | return retval; |
f1918005 | 394 | } |
c199790a | 395 | kobject_uevent(&(this_object->kobj), KOBJ_ADD); |
f1918005 | 396 | } |
c199790a | 397 | kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD); |
f1918005 ZY |
398 | return retval; |
399 | } | |
400 | ||
401 | /* Remove cache interface for CPU device */ | |
402 | static int __cpuinit cache_remove_dev(struct sys_device * sys_dev) | |
403 | { | |
404 | unsigned int cpu = sys_dev->id; | |
405 | unsigned long i; | |
406 | ||
407 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) | |
38a382ae | 408 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); |
f1918005 ZY |
409 | |
410 | if (all_cpu_cache_info[cpu].kobj.parent) { | |
38a382ae | 411 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 ZY |
412 | memset(&all_cpu_cache_info[cpu].kobj, |
413 | 0, | |
414 | sizeof(struct kobject)); | |
415 | } | |
416 | ||
417 | cpu_cache_sysfs_exit(cpu); | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
422 | /* | |
423 | * When a cpu is hot-plugged, do a check and initiate | |
424 | * cache kobject if necessary | |
425 | */ | |
9c7b216d | 426 | static int __cpuinit cache_cpu_callback(struct notifier_block *nfb, |
f1918005 ZY |
427 | unsigned long action, void *hcpu) |
428 | { | |
429 | unsigned int cpu = (unsigned long)hcpu; | |
430 | struct sys_device *sys_dev; | |
431 | ||
432 | sys_dev = get_cpu_sysdev(cpu); | |
433 | switch (action) { | |
434 | case CPU_ONLINE: | |
8bb78442 | 435 | case CPU_ONLINE_FROZEN: |
f1918005 ZY |
436 | cache_add_dev(sys_dev); |
437 | break; | |
438 | case CPU_DEAD: | |
8bb78442 | 439 | case CPU_DEAD_FROZEN: |
f1918005 ZY |
440 | cache_remove_dev(sys_dev); |
441 | break; | |
442 | } | |
443 | return NOTIFY_OK; | |
444 | } | |
445 | ||
74b85f37 | 446 | static struct notifier_block __cpuinitdata cache_cpu_notifier = |
f1918005 ZY |
447 | { |
448 | .notifier_call = cache_cpu_callback | |
449 | }; | |
450 | ||
db6a5cef | 451 | static int __init cache_sysfs_init(void) |
f1918005 ZY |
452 | { |
453 | int i; | |
454 | ||
455 | for_each_online_cpu(i) { | |
db6a5cef SS |
456 | struct sys_device *sys_dev = get_cpu_sysdev((unsigned int)i); |
457 | cache_add_dev(sys_dev); | |
f1918005 ZY |
458 | } |
459 | ||
be6b5a35 | 460 | register_hotcpu_notifier(&cache_cpu_notifier); |
f1918005 ZY |
461 | |
462 | return 0; | |
463 | } | |
464 | ||
465 | device_initcall(cache_sysfs_init); | |
466 |