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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> |
bd3ff194 | 25 | #include <linux/export.h> |
1da177e4 LT |
26 | #include <asm/mmzone.h> |
27 | #include <asm/numa.h> | |
28 | #include <asm/cpu.h> | |
29 | ||
1da177e4 LT |
30 | static struct ia64_cpu *sysfs_cpus; |
31 | ||
fe086a7b AC |
32 | void arch_fix_phys_package_id(int num, u32 slot) |
33 | { | |
34 | #ifdef CONFIG_SMP | |
35 | if (cpu_data(num)->socket_id == -1) | |
36 | cpu_data(num)->socket_id = slot; | |
37 | #endif | |
38 | } | |
39 | EXPORT_SYMBOL_GPL(arch_fix_phys_package_id); | |
40 | ||
6d3c5111 HS |
41 | |
42 | #ifdef CONFIG_HOTPLUG_CPU | |
43 | int __ref arch_register_cpu(int num) | |
1da177e4 | 44 | { |
6d3c5111 | 45 | #ifdef CONFIG_ACPI |
55e59c51 | 46 | /* |
25985edc | 47 | * If CPEI can be re-targeted or if this is not |
72486f1f | 48 | * CPEI target, then it is hotpluggable |
55e59c51 | 49 | */ |
72486f1f SS |
50 | if (can_cpei_retarget() || !is_cpu_cpei_target(num)) |
51 | sysfs_cpus[num].cpu.hotpluggable = 1; | |
3212fe15 | 52 | map_cpu_to_node(num, node_cpuid[num].nid); |
46906c44 | 53 | #endif |
76b67ed9 | 54 | return register_cpu(&sysfs_cpus[num].cpu, num); |
1da177e4 | 55 | } |
6d3c5111 | 56 | EXPORT_SYMBOL(arch_register_cpu); |
1da177e4 | 57 | |
8704ad85 | 58 | void __ref arch_unregister_cpu(int num) |
1da177e4 | 59 | { |
3212fe15 | 60 | unregister_cpu(&sysfs_cpus[num].cpu); |
8704ad85 | 61 | #ifdef CONFIG_ACPI |
3212fe15 | 62 | unmap_cpu_from_node(num, cpu_to_node(num)); |
8704ad85 | 63 | #endif |
1da177e4 | 64 | } |
1da177e4 | 65 | EXPORT_SYMBOL(arch_unregister_cpu); |
6d3c5111 HS |
66 | #else |
67 | static int __init arch_register_cpu(int num) | |
68 | { | |
69 | return register_cpu(&sysfs_cpus[num].cpu, num); | |
70 | } | |
1da177e4 LT |
71 | #endif /*CONFIG_HOTPLUG_CPU*/ |
72 | ||
73 | ||
74 | static int __init topology_init(void) | |
75 | { | |
76 | int i, err = 0; | |
77 | ||
78 | #ifdef CONFIG_NUMA | |
69dcc991 ZY |
79 | /* |
80 | * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? | |
81 | */ | |
82 | for_each_online_node(i) { | |
0fc44159 | 83 | if ((err = register_one_node(i))) |
1da177e4 | 84 | goto out; |
69dcc991 | 85 | } |
1da177e4 LT |
86 | #endif |
87 | ||
69dcc991 | 88 | sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL); |
a813213d PJ |
89 | if (!sysfs_cpus) |
90 | panic("kzalloc in topology_init failed - NR_CPUS too big?"); | |
1da177e4 | 91 | |
69dcc991 | 92 | for_each_present_cpu(i) { |
1da177e4 LT |
93 | if((err = arch_register_cpu(i))) |
94 | goto out; | |
69dcc991 | 95 | } |
1da177e4 LT |
96 | out: |
97 | return err; | |
98 | } | |
99 | ||
69dcc991 | 100 | subsys_initcall(topology_init); |
f1918005 ZY |
101 | |
102 | ||
103 | /* | |
104 | * Export cpu cache information through sysfs | |
105 | */ | |
106 | ||
107 | /* | |
108 | * A bunch of string array to get pretty printing | |
109 | */ | |
110 | static const char *cache_types[] = { | |
111 | "", /* not used */ | |
112 | "Instruction", | |
113 | "Data", | |
114 | "Unified" /* unified */ | |
115 | }; | |
116 | ||
117 | static const char *cache_mattrib[]={ | |
118 | "WriteThrough", | |
119 | "WriteBack", | |
120 | "", /* reserved */ | |
121 | "" /* reserved */ | |
122 | }; | |
123 | ||
124 | struct cache_info { | |
125 | pal_cache_config_info_t cci; | |
126 | cpumask_t shared_cpu_map; | |
127 | int level; | |
128 | int type; | |
129 | struct kobject kobj; | |
130 | }; | |
131 | ||
132 | struct cpu_cache_info { | |
133 | struct cache_info *cache_leaves; | |
134 | int num_cache_leaves; | |
135 | struct kobject kobj; | |
136 | }; | |
137 | ||
db6a5cef | 138 | static struct cpu_cache_info all_cpu_cache_info[NR_CPUS] __cpuinitdata; |
f1918005 ZY |
139 | #define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) |
140 | ||
141 | #ifdef CONFIG_SMP | |
db6a5cef | 142 | static void __cpuinit cache_shared_cpu_map_setup( unsigned int cpu, |
f1918005 ZY |
143 | struct cache_info * this_leaf) |
144 | { | |
145 | pal_cache_shared_info_t csi; | |
146 | int num_shared, i = 0; | |
147 | unsigned int j; | |
148 | ||
149 | if (cpu_data(cpu)->threads_per_core <= 1 && | |
150 | cpu_data(cpu)->cores_per_socket <= 1) { | |
151 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
152 | return; | |
153 | } | |
154 | ||
155 | if (ia64_pal_cache_shared_info(this_leaf->level, | |
156 | this_leaf->type, | |
157 | 0, | |
158 | &csi) != PAL_STATUS_SUCCESS) | |
159 | return; | |
160 | ||
161 | num_shared = (int) csi.num_shared; | |
162 | do { | |
fb1bb34d | 163 | for_each_possible_cpu(j) |
f1918005 ZY |
164 | if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id |
165 | && cpu_data(j)->core_id == csi.log1_cid | |
166 | && cpu_data(j)->thread_id == csi.log1_tid) | |
167 | cpu_set(j, this_leaf->shared_cpu_map); | |
168 | ||
169 | i++; | |
170 | } while (i < num_shared && | |
171 | ia64_pal_cache_shared_info(this_leaf->level, | |
172 | this_leaf->type, | |
173 | i, | |
174 | &csi) == PAL_STATUS_SUCCESS); | |
175 | } | |
176 | #else | |
db6a5cef | 177 | static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, |
f1918005 ZY |
178 | struct cache_info * this_leaf) |
179 | { | |
180 | cpu_set(cpu, this_leaf->shared_cpu_map); | |
181 | return; | |
182 | } | |
183 | #endif | |
184 | ||
185 | static ssize_t show_coherency_line_size(struct cache_info *this_leaf, | |
186 | char *buf) | |
187 | { | |
188 | return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); | |
189 | } | |
190 | ||
191 | static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, | |
192 | char *buf) | |
193 | { | |
194 | return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); | |
195 | } | |
196 | ||
197 | static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) | |
198 | { | |
199 | return sprintf(buf, | |
200 | "%s\n", | |
201 | cache_mattrib[this_leaf->cci.pcci_cache_attr]); | |
202 | } | |
203 | ||
204 | static ssize_t show_size(struct cache_info *this_leaf, char *buf) | |
205 | { | |
206 | return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); | |
207 | } | |
208 | ||
209 | static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) | |
210 | { | |
211 | unsigned number_of_sets = this_leaf->cci.pcci_cache_size; | |
212 | number_of_sets /= this_leaf->cci.pcci_assoc; | |
213 | number_of_sets /= 1 << this_leaf->cci.pcci_line_size; | |
214 | ||
215 | return sprintf(buf, "%u\n", number_of_sets); | |
216 | } | |
217 | ||
218 | static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) | |
219 | { | |
220 | ssize_t len; | |
221 | cpumask_t shared_cpu_map; | |
222 | ||
223 | cpus_and(shared_cpu_map, this_leaf->shared_cpu_map, cpu_online_map); | |
29c0177e | 224 | len = cpumask_scnprintf(buf, NR_CPUS+1, &shared_cpu_map); |
f1918005 ZY |
225 | len += sprintf(buf+len, "\n"); |
226 | return len; | |
227 | } | |
228 | ||
229 | static ssize_t show_type(struct cache_info *this_leaf, char *buf) | |
230 | { | |
231 | int type = this_leaf->type + this_leaf->cci.pcci_unified; | |
232 | return sprintf(buf, "%s\n", cache_types[type]); | |
233 | } | |
234 | ||
235 | static ssize_t show_level(struct cache_info *this_leaf, char *buf) | |
236 | { | |
237 | return sprintf(buf, "%u\n", this_leaf->level); | |
238 | } | |
239 | ||
240 | struct cache_attr { | |
241 | struct attribute attr; | |
242 | ssize_t (*show)(struct cache_info *, char *); | |
243 | ssize_t (*store)(struct cache_info *, const char *, size_t count); | |
244 | }; | |
245 | ||
246 | #ifdef define_one_ro | |
247 | #undef define_one_ro | |
248 | #endif | |
249 | #define define_one_ro(_name) \ | |
250 | static struct cache_attr _name = \ | |
251 | __ATTR(_name, 0444, show_##_name, NULL) | |
252 | ||
253 | define_one_ro(level); | |
254 | define_one_ro(type); | |
255 | define_one_ro(coherency_line_size); | |
256 | define_one_ro(ways_of_associativity); | |
257 | define_one_ro(size); | |
258 | define_one_ro(number_of_sets); | |
259 | define_one_ro(shared_cpu_map); | |
260 | define_one_ro(attributes); | |
261 | ||
262 | static struct attribute * cache_default_attrs[] = { | |
263 | &type.attr, | |
264 | &level.attr, | |
265 | &coherency_line_size.attr, | |
266 | &ways_of_associativity.attr, | |
267 | &attributes.attr, | |
268 | &size.attr, | |
269 | &number_of_sets.attr, | |
270 | &shared_cpu_map.attr, | |
271 | NULL | |
272 | }; | |
273 | ||
274 | #define to_object(k) container_of(k, struct cache_info, kobj) | |
275 | #define to_attr(a) container_of(a, struct cache_attr, attr) | |
276 | ||
277 | static ssize_t cache_show(struct kobject * kobj, struct attribute * attr, char * buf) | |
278 | { | |
279 | struct cache_attr *fattr = to_attr(attr); | |
280 | struct cache_info *this_leaf = to_object(kobj); | |
281 | ssize_t ret; | |
282 | ||
283 | ret = fattr->show ? fattr->show(this_leaf, buf) : 0; | |
284 | return ret; | |
285 | } | |
286 | ||
52cf25d0 | 287 | static const struct sysfs_ops cache_sysfs_ops = { |
f1918005 ZY |
288 | .show = cache_show |
289 | }; | |
290 | ||
291 | static struct kobj_type cache_ktype = { | |
292 | .sysfs_ops = &cache_sysfs_ops, | |
293 | .default_attrs = cache_default_attrs, | |
294 | }; | |
295 | ||
296 | static struct kobj_type cache_ktype_percpu_entry = { | |
297 | .sysfs_ops = &cache_sysfs_ops, | |
298 | }; | |
299 | ||
300 | static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu) | |
301 | { | |
cbf283c0 JJ |
302 | kfree(all_cpu_cache_info[cpu].cache_leaves); |
303 | all_cpu_cache_info[cpu].cache_leaves = NULL; | |
f1918005 ZY |
304 | all_cpu_cache_info[cpu].num_cache_leaves = 0; |
305 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
f1918005 ZY |
306 | return; |
307 | } | |
308 | ||
309 | static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu) | |
310 | { | |
e088a4ad | 311 | unsigned long i, levels, unique_caches; |
f1918005 ZY |
312 | pal_cache_config_info_t cci; |
313 | int j; | |
e088a4ad | 314 | long status; |
f1918005 ZY |
315 | struct cache_info *this_cache; |
316 | int num_cache_leaves = 0; | |
317 | ||
318 | if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { | |
319 | printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); | |
320 | return -1; | |
321 | } | |
322 | ||
323 | this_cache=kzalloc(sizeof(struct cache_info)*unique_caches, | |
324 | GFP_KERNEL); | |
325 | if (this_cache == NULL) | |
326 | return -ENOMEM; | |
327 | ||
328 | for (i=0; i < levels; i++) { | |
329 | for (j=2; j >0 ; j--) { | |
330 | if ((status=ia64_pal_cache_config_info(i,j, &cci)) != | |
331 | PAL_STATUS_SUCCESS) | |
332 | continue; | |
333 | ||
334 | this_cache[num_cache_leaves].cci = cci; | |
335 | this_cache[num_cache_leaves].level = i + 1; | |
336 | this_cache[num_cache_leaves].type = j; | |
337 | ||
338 | cache_shared_cpu_map_setup(cpu, | |
339 | &this_cache[num_cache_leaves]); | |
340 | num_cache_leaves ++; | |
341 | } | |
342 | } | |
343 | ||
344 | all_cpu_cache_info[cpu].cache_leaves = this_cache; | |
345 | all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; | |
346 | ||
347 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | /* Add cache interface for CPU device */ | |
353 | static int __cpuinit cache_add_dev(struct sys_device * sys_dev) | |
354 | { | |
355 | unsigned int cpu = sys_dev->id; | |
356 | unsigned long i, j; | |
357 | struct cache_info *this_object; | |
358 | int retval = 0; | |
359 | cpumask_t oldmask; | |
360 | ||
361 | if (all_cpu_cache_info[cpu].kobj.parent) | |
362 | return 0; | |
363 | ||
364 | oldmask = current->cpus_allowed; | |
552dce3a | 365 | retval = set_cpus_allowed_ptr(current, cpumask_of(cpu)); |
f1918005 ZY |
366 | if (unlikely(retval)) |
367 | return retval; | |
368 | ||
369 | retval = cpu_cache_sysfs_init(cpu); | |
552dce3a | 370 | set_cpus_allowed_ptr(current, &oldmask); |
f1918005 ZY |
371 | if (unlikely(retval < 0)) |
372 | return retval; | |
373 | ||
c199790a GKH |
374 | retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj, |
375 | &cache_ktype_percpu_entry, &sys_dev->kobj, | |
376 | "%s", "cache"); | |
5359dffd FY |
377 | if (unlikely(retval < 0)) { |
378 | cpu_cache_sysfs_exit(cpu); | |
379 | return retval; | |
380 | } | |
f1918005 ZY |
381 | |
382 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { | |
383 | this_object = LEAF_KOBJECT_PTR(cpu,i); | |
c199790a GKH |
384 | retval = kobject_init_and_add(&(this_object->kobj), |
385 | &cache_ktype, | |
386 | &all_cpu_cache_info[cpu].kobj, | |
387 | "index%1lu", i); | |
f1918005 ZY |
388 | if (unlikely(retval)) { |
389 | for (j = 0; j < i; j++) { | |
38a382ae | 390 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj)); |
f1918005 | 391 | } |
38a382ae | 392 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 | 393 | cpu_cache_sysfs_exit(cpu); |
5359dffd | 394 | return retval; |
f1918005 | 395 | } |
c199790a | 396 | kobject_uevent(&(this_object->kobj), KOBJ_ADD); |
f1918005 | 397 | } |
c199790a | 398 | kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD); |
f1918005 ZY |
399 | return retval; |
400 | } | |
401 | ||
402 | /* Remove cache interface for CPU device */ | |
403 | static int __cpuinit cache_remove_dev(struct sys_device * sys_dev) | |
404 | { | |
405 | unsigned int cpu = sys_dev->id; | |
406 | unsigned long i; | |
407 | ||
408 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) | |
38a382ae | 409 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); |
f1918005 ZY |
410 | |
411 | if (all_cpu_cache_info[cpu].kobj.parent) { | |
38a382ae | 412 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 ZY |
413 | memset(&all_cpu_cache_info[cpu].kobj, |
414 | 0, | |
415 | sizeof(struct kobject)); | |
416 | } | |
417 | ||
418 | cpu_cache_sysfs_exit(cpu); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | /* | |
424 | * When a cpu is hot-plugged, do a check and initiate | |
425 | * cache kobject if necessary | |
426 | */ | |
9c7b216d | 427 | static int __cpuinit cache_cpu_callback(struct notifier_block *nfb, |
f1918005 ZY |
428 | unsigned long action, void *hcpu) |
429 | { | |
430 | unsigned int cpu = (unsigned long)hcpu; | |
431 | struct sys_device *sys_dev; | |
432 | ||
433 | sys_dev = get_cpu_sysdev(cpu); | |
434 | switch (action) { | |
435 | case CPU_ONLINE: | |
8bb78442 | 436 | case CPU_ONLINE_FROZEN: |
f1918005 ZY |
437 | cache_add_dev(sys_dev); |
438 | break; | |
439 | case CPU_DEAD: | |
8bb78442 | 440 | case CPU_DEAD_FROZEN: |
f1918005 ZY |
441 | cache_remove_dev(sys_dev); |
442 | break; | |
443 | } | |
444 | return NOTIFY_OK; | |
445 | } | |
446 | ||
74b85f37 | 447 | static struct notifier_block __cpuinitdata cache_cpu_notifier = |
f1918005 ZY |
448 | { |
449 | .notifier_call = cache_cpu_callback | |
450 | }; | |
451 | ||
db6a5cef | 452 | static int __init cache_sysfs_init(void) |
f1918005 ZY |
453 | { |
454 | int i; | |
455 | ||
456 | for_each_online_cpu(i) { | |
db6a5cef SS |
457 | struct sys_device *sys_dev = get_cpu_sysdev((unsigned int)i); |
458 | cache_add_dev(sys_dev); | |
f1918005 ZY |
459 | } |
460 | ||
be6b5a35 | 461 | register_hotcpu_notifier(&cache_cpu_notifier); |
f1918005 ZY |
462 | |
463 | return 0; | |
464 | } | |
465 | ||
466 | device_initcall(cache_sysfs_init); | |
467 |