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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>
23#include <linux/notifier.h>
24#include <asm/mmzone.h>
25#include <asm/numa.h>
26#include <asm/cpu.h>
27
28static struct ia64_cpu *sysfs_cpus;
29
30void 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}
37EXPORT_SYMBOL_GPL(arch_fix_phys_package_id);
38
39
40#ifdef CONFIG_HOTPLUG_CPU
41int __ref arch_register_cpu(int num)
42{
43#ifdef CONFIG_ACPI
44
45
46
47
48 if (can_cpei_retarget() || !is_cpu_cpei_target(num))
49 sysfs_cpus[num].cpu.hotpluggable = 1;
50 map_cpu_to_node(num, node_cpuid[num].nid);
51#endif
52 return register_cpu(&sysfs_cpus[num].cpu, num);
53}
54EXPORT_SYMBOL(arch_register_cpu);
55
56void __ref arch_unregister_cpu(int num)
57{
58 unregister_cpu(&sysfs_cpus[num].cpu);
59#ifdef CONFIG_ACPI
60 unmap_cpu_from_node(num, cpu_to_node(num));
61#endif
62}
63EXPORT_SYMBOL(arch_unregister_cpu);
64#else
65static int __init arch_register_cpu(int num)
66{
67 return register_cpu(&sysfs_cpus[num].cpu, num);
68}
69#endif
70
71
72static int __init topology_init(void)
73{
74 int i, err = 0;
75
76#ifdef CONFIG_NUMA
77
78
79
80 for_each_online_node(i) {
81 if ((err = register_one_node(i)))
82 goto out;
83 }
84#endif
85
86 sysfs_cpus = kzalloc(sizeof(struct ia64_cpu) * NR_CPUS, GFP_KERNEL);
87 if (!sysfs_cpus)
88 panic("kzalloc in topology_init failed - NR_CPUS too big?");
89
90 for_each_present_cpu(i) {
91 if((err = arch_register_cpu(i)))
92 goto out;
93 }
94out:
95 return err;
96}
97
98subsys_initcall(topology_init);
99
100
101
102
103
104
105
106
107
108static const char *cache_types[] = {
109 "",
110 "Instruction",
111 "Data",
112 "Unified"
113};
114
115static const char *cache_mattrib[]={
116 "WriteThrough",
117 "WriteBack",
118 "",
119 ""
120};
121
122struct 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
130struct cpu_cache_info {
131 struct cache_info *cache_leaves;
132 int num_cache_leaves;
133 struct kobject kobj;
134};
135
136static struct cpu_cache_info all_cpu_cache_info[NR_CPUS] __cpuinitdata;
137#define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y])
138
139#ifdef CONFIG_SMP
140static void __cpuinit cache_shared_cpu_map_setup( unsigned int cpu,
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 {
161 for_each_possible_cpu(j)
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
175static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu,
176 struct cache_info * this_leaf)
177{
178 cpu_set(cpu, this_leaf->shared_cpu_map);
179 return;
180}
181#endif
182
183static 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
189static 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
195static 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
202static 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
207static 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
216static 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);
222 len = cpumask_scnprintf(buf, NR_CPUS+1, &shared_cpu_map);
223 len += sprintf(buf+len, "\n");
224 return len;
225}
226
227static 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
233static ssize_t show_level(struct cache_info *this_leaf, char *buf)
234{
235 return sprintf(buf, "%u\n", this_leaf->level);
236}
237
238struct 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
251define_one_ro(level);
252define_one_ro(type);
253define_one_ro(coherency_line_size);
254define_one_ro(ways_of_associativity);
255define_one_ro(size);
256define_one_ro(number_of_sets);
257define_one_ro(shared_cpu_map);
258define_one_ro(attributes);
259
260static 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
275static 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
285static struct sysfs_ops cache_sysfs_ops = {
286 .show = cache_show
287};
288
289static struct kobj_type cache_ktype = {
290 .sysfs_ops = &cache_sysfs_ops,
291 .default_attrs = cache_default_attrs,
292};
293
294static struct kobj_type cache_ktype_percpu_entry = {
295 .sysfs_ops = &cache_sysfs_ops,
296};
297
298static void __cpuinit cpu_cache_sysfs_exit(unsigned int cpu)
299{
300 kfree(all_cpu_cache_info[cpu].cache_leaves);
301 all_cpu_cache_info[cpu].cache_leaves = NULL;
302 all_cpu_cache_info[cpu].num_cache_leaves = 0;
303 memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject));
304 return;
305}
306
307static int __cpuinit cpu_cache_sysfs_init(unsigned int cpu)
308{
309 unsigned long i, levels, unique_caches;
310 pal_cache_config_info_t cci;
311 int j;
312 long status;
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
351static 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
372 retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj,
373 &cache_ktype_percpu_entry, &sys_dev->kobj,
374 "%s", "cache");
375 if (unlikely(retval < 0)) {
376 cpu_cache_sysfs_exit(cpu);
377 return retval;
378 }
379
380 for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) {
381 this_object = LEAF_KOBJECT_PTR(cpu,i);
382 retval = kobject_init_and_add(&(this_object->kobj),
383 &cache_ktype,
384 &all_cpu_cache_info[cpu].kobj,
385 "index%1lu", i);
386 if (unlikely(retval)) {
387 for (j = 0; j < i; j++) {
388 kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj));
389 }
390 kobject_put(&all_cpu_cache_info[cpu].kobj);
391 cpu_cache_sysfs_exit(cpu);
392 return retval;
393 }
394 kobject_uevent(&(this_object->kobj), KOBJ_ADD);
395 }
396 kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD);
397 return retval;
398}
399
400
401static 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++)
407 kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj));
408
409 if (all_cpu_cache_info[cpu].kobj.parent) {
410 kobject_put(&all_cpu_cache_info[cpu].kobj);
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
423
424
425static int __cpuinit cache_cpu_callback(struct notifier_block *nfb,
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:
434 case CPU_ONLINE_FROZEN:
435 cache_add_dev(sys_dev);
436 break;
437 case CPU_DEAD:
438 case CPU_DEAD_FROZEN:
439 cache_remove_dev(sys_dev);
440 break;
441 }
442 return NOTIFY_OK;
443}
444
445static struct notifier_block __cpuinitdata cache_cpu_notifier =
446{
447 .notifier_call = cache_cpu_callback
448};
449
450static int __init cache_sysfs_init(void)
451{
452 int i;
453
454 for_each_online_cpu(i) {
455 struct sys_device *sys_dev = get_cpu_sysdev((unsigned int)i);
456 cache_add_dev(sys_dev);
457 }
458
459 register_hotcpu_notifier(&cache_cpu_notifier);
460
461 return 0;
462}
463
464device_initcall(cache_sysfs_init);
465
466
