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Merge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / kernel / sysfs.c
CommitLineData
1da177e4
LT		 1#include <linux/sysdev.h>
2#include <linux/cpu.h>
3#include <linux/smp.h>
4#include <linux/percpu.h>
5#include <linux/init.h>
6#include <linux/sched.h>
7#include <linux/module.h>
8#include <linux/nodemask.h>
9#include <linux/cpumask.h>
10#include <linux/notifier.h>
11
12#include <asm/current.h>
13#include <asm/processor.h>
14#include <asm/cputable.h>
1ababe11 15#include <asm/firmware.h>
1da177e4
LT		 16#include <asm/hvcall.h>
17#include <asm/prom.h>
1da177e4 18#include <asm/machdep.h>
2249ca9d 19#include <asm/smp.h>
1da177e4 20
b950bdd0
BH		 21#ifdef CONFIG_PPC64
22#include <asm/paca.h>
23#include <asm/lppaca.h>
24#endif
25
1da177e4
LT		 26static DEFINE_PER_CPU(struct cpu, cpu_devices);
27
124c27d3
NL		 28static DEFINE_PER_CPU(struct kobject *, cache_toplevel);
29
b950bdd0
BH		 30/*
31 * SMT snooze delay stuff, 64-bit only for now
32 */
33
34#ifdef CONFIG_PPC64
1da177e4 35
0ddd3e7d
AB		 36/* Time in microseconds we delay before sleeping in the idle loop */
37DEFINE_PER_CPU(unsigned long, smt_snooze_delay) = { 100 };
1da177e4 38
4a0b2b4d
AK		 39static ssize_t store_smt_snooze_delay(struct sys_device *dev,
40 struct sysdev_attribute *attr,
41 const char *buf,
1da177e4
LT		 42 size_t count)
43{
44 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
45 ssize_t ret;
46 unsigned long snooze;
47
48 ret = sscanf(buf, "%lu", &snooze);
49 if (ret != 1)
50 return -EINVAL;
51
52 per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
53
54 return count;
55}
56
4a0b2b4d
AK		 57static ssize_t show_smt_snooze_delay(struct sys_device *dev,
58 struct sysdev_attribute *attr,
59 char *buf)
1da177e4
LT		 60{
61 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
62
63 return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
64}
65
66static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
67 store_smt_snooze_delay);
68
69/* Only parse OF options if the matching cmdline option was not specified */
70static int smt_snooze_cmdline;
71
72static int __init smt_setup(void)
73{
74 struct device_node *options;
a7f67bdf 75 const unsigned int *val;
1da177e4
LT		 76 unsigned int cpu;
77
78 if (!cpu_has_feature(CPU_FTR_SMT))
69ed3324 79 return -ENODEV;
1da177e4 80
8c8dc322 81 options = of_find_node_by_path("/options");
1da177e4 82 if (!options)
69ed3324 83 return -ENODEV;
1da177e4 84
e2eb6392 85 val = of_get_property(options, "ibm,smt-snooze-delay", NULL);
1da177e4 86 if (!smt_snooze_cmdline && val) {
0e551954 87 for_each_possible_cpu(cpu)
1da177e4
LT		 88 per_cpu(smt_snooze_delay, cpu) = *val;
89 }
90
8c8dc322 91 of_node_put(options);
69ed3324 92 return 0;
1da177e4
LT		 93}
94__initcall(smt_setup);
95
96static int __init setup_smt_snooze_delay(char *str)
97{
98 unsigned int cpu;
99 int snooze;
100
101 if (!cpu_has_feature(CPU_FTR_SMT))
102 return 1;
103
104 smt_snooze_cmdline = 1;
105
106 if (get_option(&str, &snooze)) {
0e551954 107 for_each_possible_cpu(cpu)
1da177e4
LT		 108 per_cpu(smt_snooze_delay, cpu) = snooze;
109 }
110
111 return 1;
112}
113__setup("smt-snooze-delay=", setup_smt_snooze_delay);
114
b950bdd0 115#endif /* CONFIG_PPC64 */
180a3362 116
1da177e4
LT		 117/*
118 * Enabling PMCs will slow partition context switch times so we only do
119 * it the first time we write to the PMCs.
120 */
121
122static DEFINE_PER_CPU(char, pmcs_enabled);
123
b950bdd0 124void ppc_enable_pmcs(void)
1da177e4 125{
1da177e4
LT		 126 /* Only need to enable them once */
127 if (__get_cpu_var(pmcs_enabled))
128 return;
129
130 __get_cpu_var(pmcs_enabled) = 1;
131
180a3362
ME		 132 if (ppc_md.enable_pmcs)
133 ppc_md.enable_pmcs();
1da177e4 134}
b950bdd0 135EXPORT_SYMBOL(ppc_enable_pmcs);
1da177e4 136
33a7f122 137#if defined(CONFIG_6xx) || defined(CONFIG_PPC64)
1da177e4
LT		 138/* XXX convert to rusty's on_one_cpu */
139static unsigned long run_on_cpu(unsigned long cpu,
140 unsigned long (*func)(unsigned long),
141 unsigned long arg)
142{
143 cpumask_t old_affinity = current->cpus_allowed;
144 unsigned long ret;
145
146 /* should return -EINVAL to userspace */
147 if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
148 return 0;
149
150 ret = func(arg);
151
152 set_cpus_allowed(current, old_affinity);
153
154 return ret;
155}
33a7f122 156#endif
1da177e4
LT		 157
158#define SYSFS_PMCSETUP(NAME, ADDRESS) \
159static unsigned long read_##NAME(unsigned long junk) \
160{ \
161 return mfspr(ADDRESS); \
162} \
163static unsigned long write_##NAME(unsigned long val) \
164{ \
b950bdd0 165 ppc_enable_pmcs(); \
1da177e4
LT		 166 mtspr(ADDRESS, val); \
167 return 0; \
168} \
4a0b2b4d
AK		 169static ssize_t show_##NAME(struct sys_device *dev, \
170 struct sysdev_attribute *attr, \
171 char *buf) \
1da177e4
LT		 172{ \
173 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
174 unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
175 return sprintf(buf, "%lx\n", val); \
176} \
3ff6eecc 177static ssize_t __used \
4a0b2b4d
AK		 178 store_##NAME(struct sys_device *dev, struct sysdev_attribute *attr, \
179 const char *buf, size_t count) \
1da177e4
LT		 180{ \
181 struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
182 unsigned long val; \
183 int ret = sscanf(buf, "%lx", &val); \
184 if (ret != 1) \
185 return -EINVAL; \
186 run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
187 return count; \
188}
189
6529c13d
OJ		 190
191/* Let's define all possible registers, we'll only hook up the ones
192 * that are implemented on the current processor
193 */
194
33a7f122 195#if defined(CONFIG_PPC64)
b950bdd0
BH		 196#define HAS_PPC_PMC_CLASSIC 1
197#define HAS_PPC_PMC_IBM 1
198#define HAS_PPC_PMC_PA6T 1
33a7f122 199#elif defined(CONFIG_6xx)
b950bdd0
BH		 200#define HAS_PPC_PMC_CLASSIC 1
201#define HAS_PPC_PMC_IBM 1
202#define HAS_PPC_PMC_G4 1
203#endif
204
205
206#ifdef HAS_PPC_PMC_CLASSIC
1da177e4
LT		 207SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
208SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
1da177e4
LT		 209SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
210SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
211SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
212SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
213SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
214SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
b950bdd0
BH		 215
216#ifdef HAS_PPC_PMC_G4
217SYSFS_PMCSETUP(mmcr2, SPRN_MMCR2);
218#endif
219
220#ifdef CONFIG_PPC64
1da177e4
LT		 221SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
222SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
b950bdd0
BH		 223
224SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
1da177e4 225SYSFS_PMCSETUP(purr, SPRN_PURR);
f050982a 226SYSFS_PMCSETUP(spurr, SPRN_SPURR);
4c198557 227SYSFS_PMCSETUP(dscr, SPRN_DSCR);
1da177e4 228
b950bdd0
BH		 229static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
230static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
231static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
232static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
233#endif /* CONFIG_PPC64 */
234
235#ifdef HAS_PPC_PMC_PA6T
25fc530e
OJ		 236SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
237SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
238SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
239SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
240SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
241SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
2e1957fd
OJ		 242#ifdef CONFIG_DEBUG_KERNEL
243SYSFS_PMCSETUP(hid0, SPRN_HID0);
244SYSFS_PMCSETUP(hid1, SPRN_HID1);
245SYSFS_PMCSETUP(hid4, SPRN_HID4);
246SYSFS_PMCSETUP(hid5, SPRN_HID5);
247SYSFS_PMCSETUP(ima0, SPRN_PA6T_IMA0);
248SYSFS_PMCSETUP(ima1, SPRN_PA6T_IMA1);
249SYSFS_PMCSETUP(ima2, SPRN_PA6T_IMA2);
250SYSFS_PMCSETUP(ima3, SPRN_PA6T_IMA3);
251SYSFS_PMCSETUP(ima4, SPRN_PA6T_IMA4);
252SYSFS_PMCSETUP(ima5, SPRN_PA6T_IMA5);
253SYSFS_PMCSETUP(ima6, SPRN_PA6T_IMA6);
254SYSFS_PMCSETUP(ima7, SPRN_PA6T_IMA7);
255SYSFS_PMCSETUP(ima8, SPRN_PA6T_IMA8);
256SYSFS_PMCSETUP(ima9, SPRN_PA6T_IMA9);
257SYSFS_PMCSETUP(imaat, SPRN_PA6T_IMAAT);
258SYSFS_PMCSETUP(btcr, SPRN_PA6T_BTCR);
259SYSFS_PMCSETUP(pccr, SPRN_PA6T_PCCR);
260SYSFS_PMCSETUP(rpccr, SPRN_PA6T_RPCCR);
261SYSFS_PMCSETUP(der, SPRN_PA6T_DER);
262SYSFS_PMCSETUP(mer, SPRN_PA6T_MER);
263SYSFS_PMCSETUP(ber, SPRN_PA6T_BER);
264SYSFS_PMCSETUP(ier, SPRN_PA6T_IER);
265SYSFS_PMCSETUP(sier, SPRN_PA6T_SIER);
266SYSFS_PMCSETUP(siar, SPRN_PA6T_SIAR);
267SYSFS_PMCSETUP(tsr0, SPRN_PA6T_TSR0);
268SYSFS_PMCSETUP(tsr1, SPRN_PA6T_TSR1);
269SYSFS_PMCSETUP(tsr2, SPRN_PA6T_TSR2);
270SYSFS_PMCSETUP(tsr3, SPRN_PA6T_TSR3);
271#endif /* CONFIG_DEBUG_KERNEL */
b950bdd0 272#endif /* HAS_PPC_PMC_PA6T */
6529c13d 273
b950bdd0 274#ifdef HAS_PPC_PMC_IBM
6529c13d
OJ		 275static struct sysdev_attribute ibm_common_attrs[] = {
276 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
277 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
278};
b950bdd0
BH		 279#endif /* HAS_PPC_PMC_G4 */
280
281#ifdef HAS_PPC_PMC_G4
282static struct sysdev_attribute g4_common_attrs[] = {
283 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
284 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
285 _SYSDEV_ATTR(mmcr2, 0600, show_mmcr2, store_mmcr2),
286};
287#endif /* HAS_PPC_PMC_G4 */
6529c13d 288
b950bdd0 289static struct sysdev_attribute classic_pmc_attrs[] = {
6529c13d
OJ		 290 _SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
291 _SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
292 _SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
293 _SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
294 _SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
295 _SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
b950bdd0 296#ifdef CONFIG_PPC64
6529c13d
OJ		 297 _SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
298 _SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
b950bdd0 299#endif
6529c13d
OJ		 300};
301
b950bdd0 302#ifdef HAS_PPC_PMC_PA6T
6529c13d
OJ		 303static struct sysdev_attribute pa6t_attrs[] = {
304 _SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
305 _SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
306 _SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
307 _SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
308 _SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
309 _SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
310 _SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
311 _SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
2e1957fd
OJ		 312#ifdef CONFIG_DEBUG_KERNEL
313 _SYSDEV_ATTR(hid0, 0600, show_hid0, store_hid0),
314 _SYSDEV_ATTR(hid1, 0600, show_hid1, store_hid1),
315 _SYSDEV_ATTR(hid4, 0600, show_hid4, store_hid4),
316 _SYSDEV_ATTR(hid5, 0600, show_hid5, store_hid5),
317 _SYSDEV_ATTR(ima0, 0600, show_ima0, store_ima0),
318 _SYSDEV_ATTR(ima1, 0600, show_ima1, store_ima1),
319 _SYSDEV_ATTR(ima2, 0600, show_ima2, store_ima2),
320 _SYSDEV_ATTR(ima3, 0600, show_ima3, store_ima3),
321 _SYSDEV_ATTR(ima4, 0600, show_ima4, store_ima4),
322 _SYSDEV_ATTR(ima5, 0600, show_ima5, store_ima5),
323 _SYSDEV_ATTR(ima6, 0600, show_ima6, store_ima6),
324 _SYSDEV_ATTR(ima7, 0600, show_ima7, store_ima7),
325 _SYSDEV_ATTR(ima8, 0600, show_ima8, store_ima8),
326 _SYSDEV_ATTR(ima9, 0600, show_ima9, store_ima9),
327 _SYSDEV_ATTR(imaat, 0600, show_imaat, store_imaat),
328 _SYSDEV_ATTR(btcr, 0600, show_btcr, store_btcr),
329 _SYSDEV_ATTR(pccr, 0600, show_pccr, store_pccr),
330 _SYSDEV_ATTR(rpccr, 0600, show_rpccr, store_rpccr),
331 _SYSDEV_ATTR(der, 0600, show_der, store_der),
332 _SYSDEV_ATTR(mer, 0600, show_mer, store_mer),
333 _SYSDEV_ATTR(ber, 0600, show_ber, store_ber),
334 _SYSDEV_ATTR(ier, 0600, show_ier, store_ier),
335 _SYSDEV_ATTR(sier, 0600, show_sier, store_sier),
336 _SYSDEV_ATTR(siar, 0600, show_siar, store_siar),
337 _SYSDEV_ATTR(tsr0, 0600, show_tsr0, store_tsr0),
338 _SYSDEV_ATTR(tsr1, 0600, show_tsr1, store_tsr1),
339 _SYSDEV_ATTR(tsr2, 0600, show_tsr2, store_tsr2),
340 _SYSDEV_ATTR(tsr3, 0600, show_tsr3, store_tsr3),
341#endif /* CONFIG_DEBUG_KERNEL */
6529c13d 342};
b950bdd0
BH		 343#endif /* HAS_PPC_PMC_PA6T */
344#endif /* HAS_PPC_PMC_CLASSIC */
6529c13d 345
124c27d3
NL		 346struct cache_desc {
347 struct kobject kobj;
348 struct cache_desc *next;
349 const char *type; /* Instruction, Data, or Unified */
350 u32 size; /* total cache size in KB */
351 u32 line_size; /* in bytes */
352 u32 nr_sets; /* number of sets */
353 u32 level; /* e.g. 1, 2, 3... */
354 u32 associativity; /* e.g. 8-way... 0 is fully associative */
355};
356
357DEFINE_PER_CPU(struct cache_desc *, cache_desc);
358
359static struct cache_desc *kobj_to_cache_desc(struct kobject *k)
360{
361 return container_of(k, struct cache_desc, kobj);
362}
363
364static void cache_desc_release(struct kobject *k)
365{
366 struct cache_desc *desc = kobj_to_cache_desc(k);
367
368 pr_debug("%s: releasing %s\n", __func__, kobject_name(k));
369
370 if (desc->next)
371 kobject_put(&desc->next->kobj);
372
373 kfree(kobj_to_cache_desc(k));
374}
375
376static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf)
377{
378 struct kobj_attribute *kobj_attr;
379
380 kobj_attr = container_of(attr, struct kobj_attribute, attr);
381
382 return kobj_attr->show(k, kobj_attr, buf);
383}
384
385static struct sysfs_ops cache_desc_sysfs_ops = {
386 .show = cache_desc_show,
387};
388
389static struct kobj_type cache_desc_type = {
390 .release = cache_desc_release,
391 .sysfs_ops = &cache_desc_sysfs_ops,
392};
393
394static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
395{
396 struct cache_desc *cache = kobj_to_cache_desc(k);
397
398 return sprintf(buf, "%uK\n", cache->size);
399}
400
401static struct kobj_attribute cache_size_attr =
402 __ATTR(size, 0444, cache_size_show, NULL);
403
404static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
405{
406 struct cache_desc *cache = kobj_to_cache_desc(k);
407
408 return sprintf(buf, "%u\n", cache->line_size);
409}
410
411static struct kobj_attribute cache_line_size_attr =
412 __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL);
413
414static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
415{
416 struct cache_desc *cache = kobj_to_cache_desc(k);
417
418 return sprintf(buf, "%u\n", cache->nr_sets);
419}
420
421static struct kobj_attribute cache_nr_sets_attr =
422 __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL);
423
424static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
425{
426 struct cache_desc *cache = kobj_to_cache_desc(k);
427
428 return sprintf(buf, "%s\n", cache->type);
429}
430
431static struct kobj_attribute cache_type_attr =
432 __ATTR(type, 0444, cache_type_show, NULL);
433
434static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
435{
436 struct cache_desc *cache = kobj_to_cache_desc(k);
437
438 return sprintf(buf, "%u\n", cache->level);
439}
440
441static struct kobj_attribute cache_level_attr =
442 __ATTR(level, 0444, cache_level_show, NULL);
443
444static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
445{
446 struct cache_desc *cache = kobj_to_cache_desc(k);
447
448 return sprintf(buf, "%u\n", cache->associativity);
449}
450
451static struct kobj_attribute cache_assoc_attr =
452 __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL);
453
454struct cache_desc_info {
455 const char *type;
456 const char *size_prop;
457 const char *line_size_prop;
458 const char *nr_sets_prop;
459};
460
461/* PowerPC Processor binding says the [di]-cache-* must be equal on
462 * unified caches, so just use d-cache properties. */
463static struct cache_desc_info ucache_info = {
464 .type = "Unified",
465 .size_prop = "d-cache-size",
466 .line_size_prop = "d-cache-line-size",
467 .nr_sets_prop = "d-cache-sets",
468};
469
470static struct cache_desc_info dcache_info = {
471 .type = "Data",
472 .size_prop = "d-cache-size",
473 .line_size_prop = "d-cache-line-size",
474 .nr_sets_prop = "d-cache-sets",
475};
476
477static struct cache_desc_info icache_info = {
478 .type = "Instruction",
479 .size_prop = "i-cache-size",
480 .line_size_prop = "i-cache-line-size",
481 .nr_sets_prop = "i-cache-sets",
482};
483
484static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info)
485{
486 const u32 *cache_line_size;
487 struct cache_desc *new;
488 const u32 *cache_size;
489 const u32 *nr_sets;
490 int rc;
491
492 new = kzalloc(sizeof(*new), GFP_KERNEL);
493 if (!new)
494 return NULL;
495
496 rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent,
497 "index%d", index);
498 if (rc)
499 goto err;
500
501 /* type */
502 new->type = info->type;
503 rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr);
504 WARN_ON(rc);
505
506 /* level */
507 new->level = level;
508 rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr);
509 WARN_ON(rc);
510
511 /* size */
512 cache_size = of_get_property(np, info->size_prop, NULL);
513 if (cache_size) {
514 new->size = *cache_size / 1024;
515 rc = sysfs_create_file(&new->kobj,
516 &cache_size_attr.attr);
517 WARN_ON(rc);
518 }
519
520 /* coherency_line_size */
521 cache_line_size = of_get_property(np, info->line_size_prop, NULL);
522 if (cache_line_size) {
523 new->line_size = *cache_line_size;
524 rc = sysfs_create_file(&new->kobj,
525 &cache_line_size_attr.attr);
526 WARN_ON(rc);
527 }
528
529 /* number_of_sets */
530 nr_sets = of_get_property(np, info->nr_sets_prop, NULL);
531 if (nr_sets) {
532 new->nr_sets = *nr_sets;
533 rc = sysfs_create_file(&new->kobj,
534 &cache_nr_sets_attr.attr);
535 WARN_ON(rc);
536 }
537
538 /* ways_of_associativity */
539 if (new->nr_sets == 1) {
540 /* fully associative */
541 new->associativity = 0;
542 goto create_assoc;
543 }
544
545 if (new->nr_sets && new->size && new->line_size) {
546 /* If we have values for all of these we can derive
547 * the associativity. */
548 new->associativity =
549 ((new->size * 1024) / new->nr_sets) / new->line_size;
550create_assoc:
551 rc = sysfs_create_file(&new->kobj,
552 &cache_assoc_attr.attr);
553 WARN_ON(rc);
554 }
555
556 return new;
557err:
558 kfree(new);
559 return NULL;
560}
561
562static bool cache_is_unified(struct device_node *np)
563{
564 return of_get_property(np, "cache-unified", NULL);
565}
566
567static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level)
568{
569 const phandle *next_cache_phandle;
570 struct device_node *next_cache;
571 struct cache_desc *new, **end;
572
573 pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index);
574
575 if (cache_is_unified(np)) {
576 new = create_cache_desc(np, parent, index, level,
577 &ucache_info);
578 } else {
579 new = create_cache_desc(np, parent, index, level,
580 &dcache_info);
581 if (new) {
582 index++;
583 new->next = create_cache_desc(np, parent, index, level,
584 &icache_info);
585 }
586 }
587 if (!new)
588 return NULL;
589
590 end = &new->next;
591 while (*end)
592 end = &(*end)->next;
593
594 next_cache_phandle = of_get_property(np, "l2-cache", NULL);
595 if (!next_cache_phandle)
596 goto out;
597
598 next_cache = of_find_node_by_phandle(*next_cache_phandle);
599 if (!next_cache)
600 goto out;
601
602 *end = create_cache_index_info(next_cache, parent, ++index, ++level);
603
604 of_node_put(next_cache);
605out:
606 return new;
607}
608
609static void __cpuinit create_cache_info(struct sys_device *sysdev)
610{
611 struct kobject *cache_toplevel;
612 struct device_node *np = NULL;
613 int cpu = sysdev->id;
614
615 cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj);
616 if (!cache_toplevel)
617 return;
618 per_cpu(cache_toplevel, cpu) = cache_toplevel;
619 np = of_get_cpu_node(cpu, NULL);
620 if (np != NULL) {
621 per_cpu(cache_desc, cpu) =
622 create_cache_index_info(np, cache_toplevel, 0, 1);
623 of_node_put(np);
624 }
625 return;
626}
1da177e4 627
9ba1984e 628static void __cpuinit register_cpu_online(unsigned int cpu)
1da177e4
LT		 629{
630 struct cpu *c = &per_cpu(cpu_devices, cpu);
631 struct sys_device *s = &c->sysdev;
6529c13d
OJ		 632 struct sysdev_attribute *attrs, *pmc_attrs;
633 int i, nattrs;
1da177e4 634
b950bdd0 635#ifdef CONFIG_PPC64
ad5cb17f
SR		 636 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
637 cpu_has_feature(CPU_FTR_SMT))
1da177e4 638 sysdev_create_file(s, &attr_smt_snooze_delay);
b950bdd0 639#endif
1da177e4
LT		 640
641 /* PMC stuff */
6529c13d 642 switch (cur_cpu_spec->pmc_type) {
b950bdd0 643#ifdef HAS_PPC_PMC_IBM
6529c13d
OJ		 644 case PPC_PMC_IBM:
645 attrs = ibm_common_attrs;
646 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0 647 pmc_attrs = classic_pmc_attrs;
6529c13d 648 break;
b950bdd0
BH		 649#endif /* HAS_PPC_PMC_IBM */
650#ifdef HAS_PPC_PMC_G4
651 case PPC_PMC_G4:
652 attrs = g4_common_attrs;
653 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
654 pmc_attrs = classic_pmc_attrs;
655 break;
656#endif /* HAS_PPC_PMC_G4 */
657#ifdef HAS_PPC_PMC_PA6T
6529c13d
OJ		 658 case PPC_PMC_PA6T:
659 /* PA Semi starts counting at PMC0 */
660 attrs = pa6t_attrs;
661 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
662 pmc_attrs = NULL;
663 break;
b950bdd0 664#endif /* HAS_PPC_PMC_PA6T */
6529c13d
OJ		 665 default:
666 attrs = NULL;
667 nattrs = 0;
668 pmc_attrs = NULL;
669 }
670
671 for (i = 0; i < nattrs; i++)
672 sysdev_create_file(s, &attrs[i]);
1da177e4 673
6529c13d
OJ		 674 if (pmc_attrs)
675 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
676 sysdev_create_file(s, &pmc_attrs[i]);
1da177e4 677
b950bdd0 678#ifdef CONFIG_PPC64
1da177e4
LT		 679 if (cpu_has_feature(CPU_FTR_MMCRA))
680 sysdev_create_file(s, &attr_mmcra);
681
afd05423 682 if (cpu_has_feature(CPU_FTR_PURR))
1da177e4 683 sysdev_create_file(s, &attr_purr);
4c198557 684
f050982a
AB		 685 if (cpu_has_feature(CPU_FTR_SPURR))
686 sysdev_create_file(s, &attr_spurr);
687
4c198557
AB		 688 if (cpu_has_feature(CPU_FTR_DSCR))
689 sysdev_create_file(s, &attr_dscr);
b950bdd0 690#endif /* CONFIG_PPC64 */
124c27d3
NL		 691
692 create_cache_info(s);
1da177e4
LT		 693}
694
695#ifdef CONFIG_HOTPLUG_CPU
124c27d3
NL		 696static void remove_cache_info(struct sys_device *sysdev)
697{
698 struct kobject *cache_toplevel;
699 struct cache_desc *cache_desc;
700 int cpu = sysdev->id;
701
702 cache_desc = per_cpu(cache_desc, cpu);
f3d3d307 703 if (cache_desc != NULL)
124c27d3 704 kobject_put(&cache_desc->kobj);
f3d3d307 705
124c27d3
NL		 706 cache_toplevel = per_cpu(cache_toplevel, cpu);
707 if (cache_toplevel != NULL)
708 kobject_put(cache_toplevel);
709}
710
1da177e4
LT		 711static void unregister_cpu_online(unsigned int cpu)
712{
713 struct cpu *c = &per_cpu(cpu_devices, cpu);
714 struct sys_device *s = &c->sysdev;
6529c13d
OJ		 715 struct sysdev_attribute *attrs, *pmc_attrs;
716 int i, nattrs;
1da177e4 717
72486f1f 718 BUG_ON(!c->hotpluggable);
1da177e4 719
ad5cb17f
SR		 720 if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
721 cpu_has_feature(CPU_FTR_SMT))
1da177e4 722 sysdev_remove_file(s, &attr_smt_snooze_delay);
1da177e4
LT		 723
724 /* PMC stuff */
6529c13d 725 switch (cur_cpu_spec->pmc_type) {
b950bdd0 726#ifdef HAS_PPC_PMC_IBM
6529c13d
OJ		 727 case PPC_PMC_IBM:
728 attrs = ibm_common_attrs;
729 nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
b950bdd0
BH		 730 pmc_attrs = classic_pmc_attrs;
731 break;
732#endif /* HAS_PPC_PMC_IBM */
733#ifdef HAS_PPC_PMC_G4
734 case PPC_PMC_G4:
735 attrs = g4_common_attrs;
736 nattrs = sizeof(g4_common_attrs) / sizeof(struct sysdev_attribute);
737 pmc_attrs = classic_pmc_attrs;
6529c13d 738 break;
b950bdd0
BH		 739#endif /* HAS_PPC_PMC_G4 */
740#ifdef HAS_PPC_PMC_PA6T
6529c13d
OJ		 741 case PPC_PMC_PA6T:
742 /* PA Semi starts counting at PMC0 */
743 attrs = pa6t_attrs;
744 nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
745 pmc_attrs = NULL;
746 break;
b950bdd0 747#endif /* HAS_PPC_PMC_PA6T */
6529c13d
OJ		 748 default:
749 attrs = NULL;
750 nattrs = 0;
751 pmc_attrs = NULL;
752 }
1da177e4 753
6529c13d
OJ		 754 for (i = 0; i < nattrs; i++)
755 sysdev_remove_file(s, &attrs[i]);
756
757 if (pmc_attrs)
758 for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
759 sysdev_remove_file(s, &pmc_attrs[i]);
1da177e4 760
b950bdd0 761#ifdef CONFIG_PPC64
1da177e4
LT		 762 if (cpu_has_feature(CPU_FTR_MMCRA))
763 sysdev_remove_file(s, &attr_mmcra);
764
afd05423 765 if (cpu_has_feature(CPU_FTR_PURR))
1da177e4 766 sysdev_remove_file(s, &attr_purr);
4c198557 767
f050982a
AB		 768 if (cpu_has_feature(CPU_FTR_SPURR))
769 sysdev_remove_file(s, &attr_spurr);
770
4c198557
AB		 771 if (cpu_has_feature(CPU_FTR_DSCR))
772 sysdev_remove_file(s, &attr_dscr);
b950bdd0 773#endif /* CONFIG_PPC64 */
124c27d3
NL		 774
775 remove_cache_info(s);
1da177e4
LT		 776}
777#endif /* CONFIG_HOTPLUG_CPU */
778
8c78f307 779static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
1da177e4
LT		 780 unsigned long action, void *hcpu)
781{
782 unsigned int cpu = (unsigned int)(long)hcpu;
783
784 switch (action) {
785 case CPU_ONLINE:
8bb78442 786 case CPU_ONLINE_FROZEN:
1da177e4
LT		 787 register_cpu_online(cpu);
788 break;
789#ifdef CONFIG_HOTPLUG_CPU
790 case CPU_DEAD:
8bb78442 791 case CPU_DEAD_FROZEN:
1da177e4
LT		 792 unregister_cpu_online(cpu);
793 break;
794#endif
795 }
796 return NOTIFY_OK;
797}
798
8c78f307 799static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
1da177e4
LT		 800 .notifier_call = sysfs_cpu_notify,
801};
802
0344c6c5
CK		 803static DEFINE_MUTEX(cpu_mutex);
804
805int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
806{
807 int cpu;
808
809 mutex_lock(&cpu_mutex);
810
811 for_each_possible_cpu(cpu) {
812 sysdev_create_file(get_cpu_sysdev(cpu), attr);
813 }
814
815 mutex_unlock(&cpu_mutex);
816 return 0;
817}
818EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
819
820int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
821{
822 int cpu;
823 struct sys_device *sysdev;
6bcc4c01 824 int ret;
0344c6c5
CK		 825
826 mutex_lock(&cpu_mutex);
827
828 for_each_possible_cpu(cpu) {
829 sysdev = get_cpu_sysdev(cpu);
6bcc4c01
OJ		 830 ret = sysfs_create_group(&sysdev->kobj, attrs);
831 WARN_ON(ret != 0);
0344c6c5
CK		 832 }
833
834 mutex_unlock(&cpu_mutex);
835 return 0;
836}
837EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
838
839
840void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
841{
842 int cpu;
843
844 mutex_lock(&cpu_mutex);
845
846 for_each_possible_cpu(cpu) {
847 sysdev_remove_file(get_cpu_sysdev(cpu), attr);
848 }
849
850 mutex_unlock(&cpu_mutex);
851}
852EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
853
854void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
855{
856 int cpu;
857 struct sys_device *sysdev;
858
859 mutex_lock(&cpu_mutex);
860
861 for_each_possible_cpu(cpu) {
862 sysdev = get_cpu_sysdev(cpu);
863 sysfs_remove_group(&sysdev->kobj, attrs);
864 }
865
866 mutex_unlock(&cpu_mutex);
867}
868EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
869
870
1da177e4
LT		 871/* NUMA stuff */
872
873#ifdef CONFIG_NUMA
1da177e4
LT		 874static void register_nodes(void)
875{
876 int i;
877
0fc44159
YG		 878 for (i = 0; i < MAX_NUMNODES; i++)
879 register_one_node(i);
1da177e4 880}
953039c8
JK		 881
882int sysfs_add_device_to_node(struct sys_device *dev, int nid)
883{
884 struct node *node = &node_devices[nid];
885 return sysfs_create_link(&node->sysdev.kobj, &dev->kobj,
886 kobject_name(&dev->kobj));
887}
12654f77 888EXPORT_SYMBOL_GPL(sysfs_add_device_to_node);
953039c8
JK		 889
890void sysfs_remove_device_from_node(struct sys_device *dev, int nid)
891{
892 struct node *node = &node_devices[nid];
893 sysfs_remove_link(&node->sysdev.kobj, kobject_name(&dev->kobj));
894}
12654f77 895EXPORT_SYMBOL_GPL(sysfs_remove_device_from_node);
953039c8 896
1da177e4
LT		 897#else
898static void register_nodes(void)
899{
900 return;
901}
953039c8 902
1da177e4
LT		 903#endif
904
905/* Only valid if CPU is present. */
00bf6e90
SR		 906static ssize_t show_physical_id(struct sys_device *dev,
907 struct sysdev_attribute *attr, char *buf)
1da177e4
LT		 908{
909 struct cpu *cpu = container_of(dev, struct cpu, sysdev);
910
911 return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
912}
913static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
914
915static int __init topology_init(void)
916{
917 int cpu;
1da177e4
LT		 918
919 register_nodes();
1da177e4
LT		 920 register_cpu_notifier(&sysfs_cpu_nb);
921
0e551954 922 for_each_possible_cpu(cpu) {
1da177e4
LT		 923 struct cpu *c = &per_cpu(cpu_devices, cpu);
924
1da177e4
LT		 925 /*
926 * For now, we just see if the system supports making
927 * the RTAS calls for CPU hotplug. But, there may be a
928 * more comprehensive way to do this for an individual
929 * CPU. For instance, the boot cpu might never be valid
930 * for hotplugging.
931 */
72486f1f
SS		 932 if (ppc_md.cpu_die)
933 c->hotpluggable = 1;
1da177e4 934
72486f1f 935 if (cpu_online(cpu) || c->hotpluggable) {
76b67ed9 936 register_cpu(c, cpu);
1da177e4
LT		 937
938 sysdev_create_file(&c->sysdev, &attr_physical_id);
939 }
940
941 if (cpu_online(cpu))
942 register_cpu_online(cpu);
943 }
944
945 return 0;
946}
e9e77ce8 947subsys_initcall(topology_init);
kernel source for telekom puls (alcatel/mediatek)