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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 | 21 | #include <linux/init.h> |
57c8a661 | 22 | #include <linux/memblock.h> |
1da177e4 | 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 | { |
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); |
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 KH |
58 | unregister_cpu(&sysfs_cpus[num].cpu); |
59 | unmap_cpu_from_node(num, cpu_to_node(num)); | |
1da177e4 | 60 | } |
1da177e4 | 61 | EXPORT_SYMBOL(arch_unregister_cpu); |
6d3c5111 HS |
62 | #else |
63 | static int __init arch_register_cpu(int num) | |
64 | { | |
65 | return register_cpu(&sysfs_cpus[num].cpu, num); | |
66 | } | |
1da177e4 LT |
67 | #endif /*CONFIG_HOTPLUG_CPU*/ |
68 | ||
69 | ||
70 | static int __init topology_init(void) | |
71 | { | |
72 | int i, err = 0; | |
73 | ||
74 | #ifdef CONFIG_NUMA | |
69dcc991 ZY |
75 | /* |
76 | * MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? | |
77 | */ | |
78 | for_each_online_node(i) { | |
0fc44159 | 79 | if ((err = register_one_node(i))) |
1da177e4 | 80 | goto out; |
69dcc991 | 81 | } |
1da177e4 LT |
82 | #endif |
83 | ||
6396bb22 | 84 | sysfs_cpus = kcalloc(NR_CPUS, sizeof(struct ia64_cpu), GFP_KERNEL); |
a813213d PJ |
85 | if (!sysfs_cpus) |
86 | panic("kzalloc in topology_init failed - NR_CPUS too big?"); | |
1da177e4 | 87 | |
69dcc991 | 88 | for_each_present_cpu(i) { |
1da177e4 LT |
89 | if((err = arch_register_cpu(i))) |
90 | goto out; | |
69dcc991 | 91 | } |
1da177e4 LT |
92 | out: |
93 | return err; | |
94 | } | |
95 | ||
69dcc991 | 96 | subsys_initcall(topology_init); |
f1918005 ZY |
97 | |
98 | ||
99 | /* | |
100 | * Export cpu cache information through sysfs | |
101 | */ | |
102 | ||
103 | /* | |
104 | * A bunch of string array to get pretty printing | |
105 | */ | |
106 | static const char *cache_types[] = { | |
107 | "", /* not used */ | |
108 | "Instruction", | |
109 | "Data", | |
110 | "Unified" /* unified */ | |
111 | }; | |
112 | ||
113 | static const char *cache_mattrib[]={ | |
114 | "WriteThrough", | |
115 | "WriteBack", | |
116 | "", /* reserved */ | |
117 | "" /* reserved */ | |
118 | }; | |
119 | ||
120 | struct cache_info { | |
121 | pal_cache_config_info_t cci; | |
122 | cpumask_t shared_cpu_map; | |
123 | int level; | |
124 | int type; | |
125 | struct kobject kobj; | |
126 | }; | |
127 | ||
128 | struct cpu_cache_info { | |
129 | struct cache_info *cache_leaves; | |
130 | int num_cache_leaves; | |
131 | struct kobject kobj; | |
132 | }; | |
133 | ||
ccce9bb8 | 134 | static struct cpu_cache_info all_cpu_cache_info[NR_CPUS]; |
f1918005 ZY |
135 | #define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) |
136 | ||
137 | #ifdef CONFIG_SMP | |
ccce9bb8 | 138 | static void cache_shared_cpu_map_setup(unsigned int cpu, |
f1918005 ZY |
139 | struct cache_info * this_leaf) |
140 | { | |
141 | pal_cache_shared_info_t csi; | |
142 | int num_shared, i = 0; | |
143 | unsigned int j; | |
144 | ||
145 | if (cpu_data(cpu)->threads_per_core <= 1 && | |
146 | cpu_data(cpu)->cores_per_socket <= 1) { | |
5d2068da | 147 | cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
f1918005 ZY |
148 | return; |
149 | } | |
150 | ||
151 | if (ia64_pal_cache_shared_info(this_leaf->level, | |
152 | this_leaf->type, | |
153 | 0, | |
154 | &csi) != PAL_STATUS_SUCCESS) | |
155 | return; | |
156 | ||
157 | num_shared = (int) csi.num_shared; | |
158 | do { | |
fb1bb34d | 159 | for_each_possible_cpu(j) |
f1918005 ZY |
160 | if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id |
161 | && cpu_data(j)->core_id == csi.log1_cid | |
162 | && cpu_data(j)->thread_id == csi.log1_tid) | |
5d2068da | 163 | cpumask_set_cpu(j, &this_leaf->shared_cpu_map); |
f1918005 ZY |
164 | |
165 | i++; | |
166 | } while (i < num_shared && | |
167 | ia64_pal_cache_shared_info(this_leaf->level, | |
168 | this_leaf->type, | |
169 | i, | |
170 | &csi) == PAL_STATUS_SUCCESS); | |
171 | } | |
172 | #else | |
ccce9bb8 | 173 | static void cache_shared_cpu_map_setup(unsigned int cpu, |
f1918005 ZY |
174 | struct cache_info * this_leaf) |
175 | { | |
5d2068da | 176 | cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
f1918005 ZY |
177 | return; |
178 | } | |
179 | #endif | |
180 | ||
181 | static ssize_t show_coherency_line_size(struct cache_info *this_leaf, | |
182 | char *buf) | |
183 | { | |
184 | return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); | |
185 | } | |
186 | ||
187 | static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, | |
188 | char *buf) | |
189 | { | |
190 | return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); | |
191 | } | |
192 | ||
193 | static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) | |
194 | { | |
195 | return sprintf(buf, | |
196 | "%s\n", | |
197 | cache_mattrib[this_leaf->cci.pcci_cache_attr]); | |
198 | } | |
199 | ||
200 | static ssize_t show_size(struct cache_info *this_leaf, char *buf) | |
201 | { | |
202 | return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); | |
203 | } | |
204 | ||
205 | static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) | |
206 | { | |
207 | unsigned number_of_sets = this_leaf->cci.pcci_cache_size; | |
208 | number_of_sets /= this_leaf->cci.pcci_assoc; | |
209 | number_of_sets /= 1 << this_leaf->cci.pcci_line_size; | |
210 | ||
211 | return sprintf(buf, "%u\n", number_of_sets); | |
212 | } | |
213 | ||
214 | static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) | |
215 | { | |
f1918005 ZY |
216 | cpumask_t shared_cpu_map; |
217 | ||
7d7f9848 SB |
218 | cpumask_and(&shared_cpu_map, |
219 | &this_leaf->shared_cpu_map, cpu_online_mask); | |
90b586c0 TH |
220 | return scnprintf(buf, PAGE_SIZE, "%*pb\n", |
221 | cpumask_pr_args(&shared_cpu_map)); | |
f1918005 ZY |
222 | } |
223 | ||
224 | static ssize_t show_type(struct cache_info *this_leaf, char *buf) | |
225 | { | |
226 | int type = this_leaf->type + this_leaf->cci.pcci_unified; | |
227 | return sprintf(buf, "%s\n", cache_types[type]); | |
228 | } | |
229 | ||
230 | static ssize_t show_level(struct cache_info *this_leaf, char *buf) | |
231 | { | |
232 | return sprintf(buf, "%u\n", this_leaf->level); | |
233 | } | |
234 | ||
235 | struct cache_attr { | |
236 | struct attribute attr; | |
237 | ssize_t (*show)(struct cache_info *, char *); | |
238 | ssize_t (*store)(struct cache_info *, const char *, size_t count); | |
239 | }; | |
240 | ||
241 | #ifdef define_one_ro | |
242 | #undef define_one_ro | |
243 | #endif | |
244 | #define define_one_ro(_name) \ | |
245 | static struct cache_attr _name = \ | |
246 | __ATTR(_name, 0444, show_##_name, NULL) | |
247 | ||
248 | define_one_ro(level); | |
249 | define_one_ro(type); | |
250 | define_one_ro(coherency_line_size); | |
251 | define_one_ro(ways_of_associativity); | |
252 | define_one_ro(size); | |
253 | define_one_ro(number_of_sets); | |
254 | define_one_ro(shared_cpu_map); | |
255 | define_one_ro(attributes); | |
256 | ||
257 | static struct attribute * cache_default_attrs[] = { | |
258 | &type.attr, | |
259 | &level.attr, | |
260 | &coherency_line_size.attr, | |
261 | &ways_of_associativity.attr, | |
262 | &attributes.attr, | |
263 | &size.attr, | |
264 | &number_of_sets.attr, | |
265 | &shared_cpu_map.attr, | |
266 | NULL | |
267 | }; | |
268 | ||
269 | #define to_object(k) container_of(k, struct cache_info, kobj) | |
270 | #define to_attr(a) container_of(a, struct cache_attr, attr) | |
271 | ||
4fafc8c2 | 272 | static ssize_t ia64_cache_show(struct kobject * kobj, struct attribute * attr, char * buf) |
f1918005 ZY |
273 | { |
274 | struct cache_attr *fattr = to_attr(attr); | |
275 | struct cache_info *this_leaf = to_object(kobj); | |
276 | ssize_t ret; | |
277 | ||
278 | ret = fattr->show ? fattr->show(this_leaf, buf) : 0; | |
279 | return ret; | |
280 | } | |
281 | ||
52cf25d0 | 282 | static const struct sysfs_ops cache_sysfs_ops = { |
4fafc8c2 | 283 | .show = ia64_cache_show |
f1918005 ZY |
284 | }; |
285 | ||
286 | static struct kobj_type cache_ktype = { | |
287 | .sysfs_ops = &cache_sysfs_ops, | |
288 | .default_attrs = cache_default_attrs, | |
289 | }; | |
290 | ||
291 | static struct kobj_type cache_ktype_percpu_entry = { | |
292 | .sysfs_ops = &cache_sysfs_ops, | |
293 | }; | |
294 | ||
ccce9bb8 | 295 | static void cpu_cache_sysfs_exit(unsigned int cpu) |
f1918005 | 296 | { |
cbf283c0 JJ |
297 | kfree(all_cpu_cache_info[cpu].cache_leaves); |
298 | all_cpu_cache_info[cpu].cache_leaves = NULL; | |
f1918005 ZY |
299 | all_cpu_cache_info[cpu].num_cache_leaves = 0; |
300 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
f1918005 ZY |
301 | return; |
302 | } | |
303 | ||
ccce9bb8 | 304 | static int cpu_cache_sysfs_init(unsigned int cpu) |
f1918005 | 305 | { |
e088a4ad | 306 | unsigned long i, levels, unique_caches; |
f1918005 ZY |
307 | pal_cache_config_info_t cci; |
308 | int j; | |
e088a4ad | 309 | long status; |
f1918005 ZY |
310 | struct cache_info *this_cache; |
311 | int num_cache_leaves = 0; | |
312 | ||
313 | if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { | |
314 | printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); | |
315 | return -1; | |
316 | } | |
317 | ||
6396bb22 KC |
318 | this_cache=kcalloc(unique_caches, sizeof(struct cache_info), |
319 | GFP_KERNEL); | |
f1918005 ZY |
320 | if (this_cache == NULL) |
321 | return -ENOMEM; | |
322 | ||
323 | for (i=0; i < levels; i++) { | |
324 | for (j=2; j >0 ; j--) { | |
325 | if ((status=ia64_pal_cache_config_info(i,j, &cci)) != | |
326 | PAL_STATUS_SUCCESS) | |
327 | continue; | |
328 | ||
329 | this_cache[num_cache_leaves].cci = cci; | |
330 | this_cache[num_cache_leaves].level = i + 1; | |
331 | this_cache[num_cache_leaves].type = j; | |
332 | ||
333 | cache_shared_cpu_map_setup(cpu, | |
334 | &this_cache[num_cache_leaves]); | |
335 | num_cache_leaves ++; | |
336 | } | |
337 | } | |
338 | ||
339 | all_cpu_cache_info[cpu].cache_leaves = this_cache; | |
340 | all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; | |
341 | ||
342 | memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | /* Add cache interface for CPU device */ | |
5c584dd5 | 348 | static int cache_add_dev(unsigned int cpu) |
f1918005 | 349 | { |
5c584dd5 | 350 | struct device *sys_dev = get_cpu_device(cpu); |
f1918005 ZY |
351 | unsigned long i, j; |
352 | struct cache_info *this_object; | |
353 | int retval = 0; | |
f1918005 ZY |
354 | |
355 | if (all_cpu_cache_info[cpu].kobj.parent) | |
356 | return 0; | |
357 | ||
f1918005 ZY |
358 | |
359 | retval = cpu_cache_sysfs_init(cpu); | |
f1918005 ZY |
360 | if (unlikely(retval < 0)) |
361 | return retval; | |
362 | ||
c199790a GKH |
363 | retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj, |
364 | &cache_ktype_percpu_entry, &sys_dev->kobj, | |
365 | "%s", "cache"); | |
5359dffd FY |
366 | if (unlikely(retval < 0)) { |
367 | cpu_cache_sysfs_exit(cpu); | |
368 | return retval; | |
369 | } | |
f1918005 ZY |
370 | |
371 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { | |
372 | this_object = LEAF_KOBJECT_PTR(cpu,i); | |
c199790a GKH |
373 | retval = kobject_init_and_add(&(this_object->kobj), |
374 | &cache_ktype, | |
375 | &all_cpu_cache_info[cpu].kobj, | |
376 | "index%1lu", i); | |
f1918005 ZY |
377 | if (unlikely(retval)) { |
378 | for (j = 0; j < i; j++) { | |
38a382ae | 379 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj)); |
f1918005 | 380 | } |
38a382ae | 381 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 | 382 | cpu_cache_sysfs_exit(cpu); |
5359dffd | 383 | return retval; |
f1918005 | 384 | } |
c199790a | 385 | kobject_uevent(&(this_object->kobj), KOBJ_ADD); |
f1918005 | 386 | } |
c199790a | 387 | kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD); |
f1918005 ZY |
388 | return retval; |
389 | } | |
390 | ||
391 | /* Remove cache interface for CPU device */ | |
5c584dd5 | 392 | static int cache_remove_dev(unsigned int cpu) |
f1918005 | 393 | { |
f1918005 ZY |
394 | unsigned long i; |
395 | ||
396 | for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) | |
38a382ae | 397 | kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); |
f1918005 ZY |
398 | |
399 | if (all_cpu_cache_info[cpu].kobj.parent) { | |
38a382ae | 400 | kobject_put(&all_cpu_cache_info[cpu].kobj); |
f1918005 ZY |
401 | memset(&all_cpu_cache_info[cpu].kobj, |
402 | 0, | |
403 | sizeof(struct kobject)); | |
404 | } | |
405 | ||
406 | cpu_cache_sysfs_exit(cpu); | |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
db6a5cef | 411 | static int __init cache_sysfs_init(void) |
f1918005 | 412 | { |
5c584dd5 | 413 | int ret; |
f1918005 | 414 | |
5c584dd5 SAS |
415 | ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/topology:online", |
416 | cache_add_dev, cache_remove_dev); | |
417 | WARN_ON(ret < 0); | |
f1918005 ZY |
418 | return 0; |
419 | } | |
f1918005 | 420 | device_initcall(cache_sysfs_init); |